/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) | +----------------------------------------------------------------------+ | This source file is subject to version 2.00 of the Zend license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.zend.com/license/2_00.txt. | | If you did not receive a copy of the Zend license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@zend.com so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Authors: Andi Gutmans | | Zeev Suraski | | Nikita Popov | +----------------------------------------------------------------------+ */ #include #include "zend.h" #include "zend_compile.h" #include "zend_constants.h" #include "zend_llist.h" #include "zend_API.h" #include "zend_exceptions.h" #include "zend_interfaces.h" #include "zend_virtual_cwd.h" #include "zend_multibyte.h" #include "zend_language_scanner.h" #include "zend_inheritance.h" #include "zend_vm.h" #define SET_NODE(target, src) do { \ target ## _type = (src)->op_type; \ if ((src)->op_type == IS_CONST) { \ target.constant = zend_add_literal(&(src)->u.constant); \ } else { \ target = (src)->u.op; \ } \ } while (0) #define GET_NODE(target, src) do { \ (target)->op_type = src ## _type; \ if ((target)->op_type == IS_CONST) { \ ZVAL_COPY_VALUE(&(target)->u.constant, CT_CONSTANT(src)); \ } else { \ (target)->u.op = src; \ } \ } while (0) #define FC(member) (CG(file_context).member) typedef struct _zend_loop_var { zend_uchar opcode; zend_uchar var_type; uint32_t var_num; uint32_t try_catch_offset; } zend_loop_var; static inline uint32_t zend_alloc_cache_slots(unsigned count) { zend_op_array *op_array = CG(active_op_array); uint32_t ret = op_array->cache_size; op_array->cache_size += count * sizeof(void*); return ret; } static inline uint32_t zend_alloc_cache_slot(void) { return zend_alloc_cache_slots(1); } ZEND_API zend_op_array *(*zend_compile_file)(zend_file_handle *file_handle, int type); ZEND_API zend_op_array *(*zend_compile_string)(zval *source_string, char *filename); #ifndef ZTS ZEND_API zend_compiler_globals compiler_globals; ZEND_API zend_executor_globals executor_globals; #endif static zend_op *zend_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2); static zend_bool zend_try_ct_eval_array(zval *result, zend_ast *ast); static void init_op(zend_op *op) { MAKE_NOP(op); op->extended_value = 0; op->lineno = CG(zend_lineno); } static zend_always_inline uint32_t get_next_op_number(void) { return CG(active_op_array)->last; } static zend_op *get_next_op(void) { zend_op_array *op_array = CG(active_op_array); uint32_t next_op_num = op_array->last++; zend_op *next_op; if (UNEXPECTED(next_op_num >= CG(context).opcodes_size)) { CG(context).opcodes_size *= 4; op_array->opcodes = erealloc(op_array->opcodes, CG(context).opcodes_size * sizeof(zend_op)); } next_op = &(op_array->opcodes[next_op_num]); init_op(next_op); return next_op; } static zend_brk_cont_element *get_next_brk_cont_element(void) { CG(context).last_brk_cont++; CG(context).brk_cont_array = erealloc(CG(context).brk_cont_array, sizeof(zend_brk_cont_element) * CG(context).last_brk_cont); return &CG(context).brk_cont_array[CG(context).last_brk_cont-1]; } static void zend_destroy_property_info_internal(zval *zv) /* {{{ */ { zend_property_info *property_info = Z_PTR_P(zv); zend_string_release(property_info->name); free(property_info); } /* }}} */ static zend_string *zend_build_runtime_definition_key(zend_string *name, uint32_t start_lineno) /* {{{ */ { zend_string *filename = CG(active_op_array)->filename; zend_string *result = zend_strpprintf(0, "%c%s%s:%" PRIu32 "$%" PRIx32, '\0', ZSTR_VAL(name), ZSTR_VAL(filename), start_lineno, CG(rtd_key_counter)++); return zend_new_interned_string(result); } /* }}} */ static zend_bool zend_get_unqualified_name(const zend_string *name, const char **result, size_t *result_len) /* {{{ */ { const char *ns_separator = zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)); if (ns_separator != NULL) { *result = ns_separator + 1; *result_len = ZSTR_VAL(name) + ZSTR_LEN(name) - *result; return 1; } return 0; } /* }}} */ struct reserved_class_name { const char *name; size_t len; }; static const struct reserved_class_name reserved_class_names[] = { {ZEND_STRL("bool")}, {ZEND_STRL("false")}, {ZEND_STRL("float")}, {ZEND_STRL("int")}, {ZEND_STRL("null")}, {ZEND_STRL("parent")}, {ZEND_STRL("self")}, {ZEND_STRL("static")}, {ZEND_STRL("string")}, {ZEND_STRL("true")}, {ZEND_STRL("void")}, {ZEND_STRL("iterable")}, {ZEND_STRL("object")}, {NULL, 0} }; static zend_bool zend_is_reserved_class_name(const zend_string *name) /* {{{ */ { const struct reserved_class_name *reserved = reserved_class_names; const char *uqname = ZSTR_VAL(name); size_t uqname_len = ZSTR_LEN(name); zend_get_unqualified_name(name, &uqname, &uqname_len); for (; reserved->name; ++reserved) { if (uqname_len == reserved->len && zend_binary_strcasecmp(uqname, uqname_len, reserved->name, reserved->len) == 0 ) { return 1; } } return 0; } /* }}} */ void zend_assert_valid_class_name(const zend_string *name) /* {{{ */ { if (zend_is_reserved_class_name(name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as class name as it is reserved", ZSTR_VAL(name)); } } /* }}} */ typedef struct _builtin_type_info { const char* name; const size_t name_len; const zend_uchar type; } builtin_type_info; static const builtin_type_info builtin_types[] = { {ZEND_STRL("int"), IS_LONG}, {ZEND_STRL("float"), IS_DOUBLE}, {ZEND_STRL("string"), IS_STRING}, {ZEND_STRL("bool"), _IS_BOOL}, {ZEND_STRL("void"), IS_VOID}, {ZEND_STRL("iterable"), IS_ITERABLE}, {ZEND_STRL("object"), IS_OBJECT}, {NULL, 0, IS_UNDEF} }; static zend_always_inline zend_uchar zend_lookup_builtin_type_by_name(const zend_string *name) /* {{{ */ { const builtin_type_info *info = &builtin_types[0]; for (; info->name; ++info) { if (ZSTR_LEN(name) == info->name_len && zend_binary_strcasecmp(ZSTR_VAL(name), ZSTR_LEN(name), info->name, info->name_len) == 0 ) { return info->type; } } return 0; } /* }}} */ void zend_oparray_context_begin(zend_oparray_context *prev_context) /* {{{ */ { *prev_context = CG(context); CG(context).opcodes_size = INITIAL_OP_ARRAY_SIZE; CG(context).vars_size = 0; CG(context).literals_size = 0; CG(context).fast_call_var = -1; CG(context).try_catch_offset = -1; CG(context).current_brk_cont = -1; CG(context).last_brk_cont = 0; CG(context).brk_cont_array = NULL; CG(context).labels = NULL; } /* }}} */ void zend_oparray_context_end(zend_oparray_context *prev_context) /* {{{ */ { if (CG(context).brk_cont_array) { efree(CG(context).brk_cont_array); CG(context).brk_cont_array = NULL; } if (CG(context).labels) { zend_hash_destroy(CG(context).labels); FREE_HASHTABLE(CG(context).labels); CG(context).labels = NULL; } CG(context) = *prev_context; } /* }}} */ static void zend_reset_import_tables(void) /* {{{ */ { if (FC(imports)) { zend_hash_destroy(FC(imports)); efree(FC(imports)); FC(imports) = NULL; } if (FC(imports_function)) { zend_hash_destroy(FC(imports_function)); efree(FC(imports_function)); FC(imports_function) = NULL; } if (FC(imports_const)) { zend_hash_destroy(FC(imports_const)); efree(FC(imports_const)); FC(imports_const) = NULL; } } /* }}} */ static void zend_end_namespace(void) /* {{{ */ { FC(in_namespace) = 0; zend_reset_import_tables(); if (FC(current_namespace)) { zend_string_release_ex(FC(current_namespace), 0); FC(current_namespace) = NULL; } } /* }}} */ void zend_file_context_begin(zend_file_context *prev_context) /* {{{ */ { *prev_context = CG(file_context); FC(imports) = NULL; FC(imports_function) = NULL; FC(imports_const) = NULL; FC(current_namespace) = NULL; FC(in_namespace) = 0; FC(has_bracketed_namespaces) = 0; FC(declarables).ticks = 0; zend_hash_init(&FC(seen_symbols), 8, NULL, NULL, 0); } /* }}} */ void zend_file_context_end(zend_file_context *prev_context) /* {{{ */ { zend_end_namespace(); zend_hash_destroy(&FC(seen_symbols)); CG(file_context) = *prev_context; } /* }}} */ void zend_init_compiler_data_structures(void) /* {{{ */ { zend_stack_init(&CG(loop_var_stack), sizeof(zend_loop_var)); zend_stack_init(&CG(delayed_oplines_stack), sizeof(zend_op)); CG(active_class_entry) = NULL; CG(in_compilation) = 0; CG(skip_shebang) = 0; CG(encoding_declared) = 0; CG(memoized_exprs) = NULL; CG(memoize_mode) = 0; } /* }}} */ static void zend_register_seen_symbol(zend_string *name, uint32_t kind) { zval *zv = zend_hash_find(&FC(seen_symbols), name); if (zv) { Z_LVAL_P(zv) |= kind; } else { zval tmp; ZVAL_LONG(&tmp, kind); zend_hash_add_new(&FC(seen_symbols), name, &tmp); } } static zend_bool zend_have_seen_symbol(zend_string *name, uint32_t kind) { zval *zv = zend_hash_find(&FC(seen_symbols), name); return zv && (Z_LVAL_P(zv) & kind) != 0; } ZEND_API void file_handle_dtor(zend_file_handle *fh) /* {{{ */ { zend_file_handle_dtor(fh); } /* }}} */ void init_compiler(void) /* {{{ */ { CG(arena) = zend_arena_create(64 * 1024); CG(active_op_array) = NULL; memset(&CG(context), 0, sizeof(CG(context))); zend_init_compiler_data_structures(); zend_init_rsrc_list(); zend_hash_init(&CG(filenames_table), 8, NULL, ZVAL_PTR_DTOR, 0); zend_llist_init(&CG(open_files), sizeof(zend_file_handle), (void (*)(void *)) file_handle_dtor, 0); CG(unclean_shutdown) = 0; CG(delayed_variance_obligations) = NULL; CG(delayed_autoloads) = NULL; } /* }}} */ void shutdown_compiler(void) /* {{{ */ { zend_stack_destroy(&CG(loop_var_stack)); zend_stack_destroy(&CG(delayed_oplines_stack)); zend_hash_destroy(&CG(filenames_table)); zend_arena_destroy(CG(arena)); if (CG(delayed_variance_obligations)) { zend_hash_destroy(CG(delayed_variance_obligations)); FREE_HASHTABLE(CG(delayed_variance_obligations)); CG(delayed_variance_obligations) = NULL; } if (CG(delayed_autoloads)) { zend_hash_destroy(CG(delayed_autoloads)); FREE_HASHTABLE(CG(delayed_autoloads)); CG(delayed_autoloads) = NULL; } } /* }}} */ ZEND_API zend_string *zend_set_compiled_filename(zend_string *new_compiled_filename) /* {{{ */ { zval *p, rv; if ((p = zend_hash_find(&CG(filenames_table), new_compiled_filename))) { ZEND_ASSERT(Z_TYPE_P(p) == IS_STRING); CG(compiled_filename) = Z_STR_P(p); return Z_STR_P(p); } new_compiled_filename = zend_new_interned_string(zend_string_copy(new_compiled_filename)); ZVAL_STR(&rv, new_compiled_filename); zend_hash_add_new(&CG(filenames_table), new_compiled_filename, &rv); CG(compiled_filename) = new_compiled_filename; return new_compiled_filename; } /* }}} */ ZEND_API void zend_restore_compiled_filename(zend_string *original_compiled_filename) /* {{{ */ { CG(compiled_filename) = original_compiled_filename; } /* }}} */ ZEND_API zend_string *zend_get_compiled_filename(void) /* {{{ */ { return CG(compiled_filename); } /* }}} */ ZEND_API int zend_get_compiled_lineno(void) /* {{{ */ { return CG(zend_lineno); } /* }}} */ ZEND_API zend_bool zend_is_compiling(void) /* {{{ */ { return CG(in_compilation); } /* }}} */ static zend_always_inline uint32_t get_temporary_variable(void) /* {{{ */ { return (uint32_t)CG(active_op_array)->T++; } /* }}} */ static int lookup_cv(zend_string *name) /* {{{ */{ zend_op_array *op_array = CG(active_op_array); int i = 0; zend_ulong hash_value = zend_string_hash_val(name); while (i < op_array->last_var) { if (ZSTR_H(op_array->vars[i]) == hash_value && zend_string_equals(op_array->vars[i], name)) { return (int)(zend_intptr_t)ZEND_CALL_VAR_NUM(NULL, i); } i++; } i = op_array->last_var; op_array->last_var++; if (op_array->last_var > CG(context).vars_size) { CG(context).vars_size += 16; /* FIXME */ op_array->vars = erealloc(op_array->vars, CG(context).vars_size * sizeof(zend_string*)); } op_array->vars[i] = zend_string_copy(name); return (int)(zend_intptr_t)ZEND_CALL_VAR_NUM(NULL, i); } /* }}} */ void zend_del_literal(zend_op_array *op_array, int n) /* {{{ */ { zval_ptr_dtor_nogc(CT_CONSTANT_EX(op_array, n)); if (n + 1 == op_array->last_literal) { op_array->last_literal--; } else { ZVAL_UNDEF(CT_CONSTANT_EX(op_array, n)); } } /* }}} */ static inline zend_string *zval_make_interned_string(zval *zv) /* {{{ */ { ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING); Z_STR_P(zv) = zend_new_interned_string(Z_STR_P(zv)); if (ZSTR_IS_INTERNED(Z_STR_P(zv))) { Z_TYPE_FLAGS_P(zv) = 0; } return Z_STR_P(zv); } /* Common part of zend_add_literal and zend_append_individual_literal */ static inline void zend_insert_literal(zend_op_array *op_array, zval *zv, int literal_position) /* {{{ */ { zval *lit = CT_CONSTANT_EX(op_array, literal_position); if (Z_TYPE_P(zv) == IS_STRING) { zval_make_interned_string(zv); } ZVAL_COPY_VALUE(lit, zv); Z_EXTRA_P(lit) = 0; } /* }}} */ /* Is used while compiling a function, using the context to keep track of an approximate size to avoid to relocate to often. Literals are truncated to actual size in the second compiler pass (pass_two()). */ static int zend_add_literal(zval *zv) /* {{{ */ { zend_op_array *op_array = CG(active_op_array); int i = op_array->last_literal; op_array->last_literal++; if (i >= CG(context).literals_size) { while (i >= CG(context).literals_size) { CG(context).literals_size += 16; /* FIXME */ } op_array->literals = (zval*)erealloc(op_array->literals, CG(context).literals_size * sizeof(zval)); } zend_insert_literal(op_array, zv, i); return i; } /* }}} */ static inline int zend_add_literal_string(zend_string **str) /* {{{ */ { int ret; zval zv; ZVAL_STR(&zv, *str); ret = zend_add_literal(&zv); *str = Z_STR(zv); return ret; } /* }}} */ static int zend_add_func_name_literal(zend_string *name) /* {{{ */ { /* Original name */ int ret = zend_add_literal_string(&name); /* Lowercased name */ zend_string *lc_name = zend_string_tolower(name); zend_add_literal_string(&lc_name); return ret; } /* }}} */ static int zend_add_ns_func_name_literal(zend_string *name) /* {{{ */ { const char *unqualified_name; size_t unqualified_name_len; /* Original name */ int ret = zend_add_literal_string(&name); /* Lowercased name */ zend_string *lc_name = zend_string_tolower(name); zend_add_literal_string(&lc_name); /* Lowercased unqualfied name */ if (zend_get_unqualified_name(name, &unqualified_name, &unqualified_name_len)) { lc_name = zend_string_alloc(unqualified_name_len, 0); zend_str_tolower_copy(ZSTR_VAL(lc_name), unqualified_name, unqualified_name_len); zend_add_literal_string(&lc_name); } return ret; } /* }}} */ static int zend_add_class_name_literal(zend_string *name) /* {{{ */ { /* Original name */ int ret = zend_add_literal_string(&name); /* Lowercased name */ zend_string *lc_name = zend_string_tolower(name); zend_add_literal_string(&lc_name); return ret; } /* }}} */ static int zend_add_const_name_literal(zend_string *name, zend_bool unqualified) /* {{{ */ { zend_string *tmp_name; int ret = zend_add_literal_string(&name); size_t ns_len = 0, after_ns_len = ZSTR_LEN(name); const char *after_ns = zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)); if (after_ns) { after_ns += 1; ns_len = after_ns - ZSTR_VAL(name) - 1; after_ns_len = ZSTR_LEN(name) - ns_len - 1; /* lowercased namespace name & original constant name */ tmp_name = zend_string_init(ZSTR_VAL(name), ZSTR_LEN(name), 0); zend_str_tolower(ZSTR_VAL(tmp_name), ns_len); zend_add_literal_string(&tmp_name); /* lowercased namespace name & lowercased constant name */ tmp_name = zend_string_tolower(name); zend_add_literal_string(&tmp_name); if (!unqualified) { return ret; } } else { after_ns = ZSTR_VAL(name); } /* original unqualified constant name */ tmp_name = zend_string_init(after_ns, after_ns_len, 0); zend_add_literal_string(&tmp_name); /* lowercased unqualified constant name */ tmp_name = zend_string_alloc(after_ns_len, 0); zend_str_tolower_copy(ZSTR_VAL(tmp_name), after_ns, after_ns_len); zend_add_literal_string(&tmp_name); return ret; } /* }}} */ #define LITERAL_STR(op, str) do { \ zval _c; \ ZVAL_STR(&_c, str); \ op.constant = zend_add_literal(&_c); \ } while (0) void zend_stop_lexing(void) { if (LANG_SCNG(on_event)) { LANG_SCNG(on_event)(ON_STOP, END, 0, LANG_SCNG(on_event_context)); } LANG_SCNG(yy_cursor) = LANG_SCNG(yy_limit); } static inline void zend_begin_loop( zend_uchar free_opcode, const znode *loop_var, zend_bool is_switch) /* {{{ */ { zend_brk_cont_element *brk_cont_element; int parent = CG(context).current_brk_cont; zend_loop_var info = {0}; CG(context).current_brk_cont = CG(context).last_brk_cont; brk_cont_element = get_next_brk_cont_element(); brk_cont_element->parent = parent; brk_cont_element->is_switch = is_switch; if (loop_var && (loop_var->op_type & (IS_VAR|IS_TMP_VAR))) { uint32_t start = get_next_op_number(); info.opcode = free_opcode; info.var_type = loop_var->op_type; info.var_num = loop_var->u.op.var; brk_cont_element->start = start; } else { info.opcode = ZEND_NOP; /* The start field is used to free temporary variables in case of exceptions. * We won't try to free something of we don't have loop variable. */ brk_cont_element->start = -1; } zend_stack_push(&CG(loop_var_stack), &info); } /* }}} */ static inline void zend_end_loop(int cont_addr, const znode *var_node) /* {{{ */ { uint32_t end = get_next_op_number(); zend_brk_cont_element *brk_cont_element = &CG(context).brk_cont_array[CG(context).current_brk_cont]; brk_cont_element->cont = cont_addr; brk_cont_element->brk = end; CG(context).current_brk_cont = brk_cont_element->parent; zend_stack_del_top(&CG(loop_var_stack)); } /* }}} */ void zend_do_free(znode *op1) /* {{{ */ { if (op1->op_type == IS_TMP_VAR) { zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1]; while (opline->opcode == ZEND_END_SILENCE) { opline--; } if (opline->result_type == IS_TMP_VAR && opline->result.var == op1->u.op.var) { if (opline->opcode == ZEND_BOOL || opline->opcode == ZEND_BOOL_NOT) { return; } } zend_emit_op(NULL, ZEND_FREE, op1, NULL); } else if (op1->op_type == IS_VAR) { zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1]; while (opline->opcode == ZEND_END_SILENCE || opline->opcode == ZEND_EXT_FCALL_END || opline->opcode == ZEND_OP_DATA) { opline--; } if (opline->result_type == IS_VAR && opline->result.var == op1->u.op.var) { if (opline->opcode == ZEND_FETCH_THIS) { opline->opcode = ZEND_NOP; opline->result_type = IS_UNUSED; } else { opline->result_type = IS_UNUSED; } } else { while (opline >= CG(active_op_array)->opcodes) { if ((opline->opcode == ZEND_FETCH_LIST_R || opline->opcode == ZEND_FETCH_LIST_W) && opline->op1_type == IS_VAR && opline->op1.var == op1->u.op.var) { zend_emit_op(NULL, ZEND_FREE, op1, NULL); return; } if (opline->result_type == IS_VAR && opline->result.var == op1->u.op.var) { if (opline->opcode == ZEND_NEW) { zend_emit_op(NULL, ZEND_FREE, op1, NULL); } break; } opline--; } } } else if (op1->op_type == IS_CONST) { /* Destroy value without using GC: When opcache moves arrays into SHM it will * free the zend_array structure, so references to it from outside the op array * become invalid. GC would cause such a reference in the root buffer. */ zval_ptr_dtor_nogc(&op1->u.constant); } } /* }}} */ uint32_t zend_add_class_modifier(uint32_t flags, uint32_t new_flag) /* {{{ */ { uint32_t new_flags = flags | new_flag; if ((flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) && (new_flag & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) { zend_throw_exception(zend_ce_compile_error, "Multiple abstract modifiers are not allowed", 0); return 0; } if ((flags & ZEND_ACC_FINAL) && (new_flag & ZEND_ACC_FINAL)) { zend_throw_exception(zend_ce_compile_error, "Multiple final modifiers are not allowed", 0); return 0; } if ((new_flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) && (new_flags & ZEND_ACC_FINAL)) { zend_throw_exception(zend_ce_compile_error, "Cannot use the final modifier on an abstract class", 0); return 0; } return new_flags; } /* }}} */ uint32_t zend_add_member_modifier(uint32_t flags, uint32_t new_flag) /* {{{ */ { uint32_t new_flags = flags | new_flag; if ((flags & ZEND_ACC_PPP_MASK) && (new_flag & ZEND_ACC_PPP_MASK)) { zend_throw_exception(zend_ce_compile_error, "Multiple access type modifiers are not allowed", 0); return 0; } if ((flags & ZEND_ACC_ABSTRACT) && (new_flag & ZEND_ACC_ABSTRACT)) { zend_throw_exception(zend_ce_compile_error, "Multiple abstract modifiers are not allowed", 0); return 0; } if ((flags & ZEND_ACC_STATIC) && (new_flag & ZEND_ACC_STATIC)) { zend_throw_exception(zend_ce_compile_error, "Multiple static modifiers are not allowed", 0); return 0; } if ((flags & ZEND_ACC_FINAL) && (new_flag & ZEND_ACC_FINAL)) { zend_throw_exception(zend_ce_compile_error, "Multiple final modifiers are not allowed", 0); return 0; } if ((new_flags & ZEND_ACC_ABSTRACT) && (new_flags & ZEND_ACC_FINAL)) { zend_throw_exception(zend_ce_compile_error, "Cannot use the final modifier on an abstract class member", 0); return 0; } return new_flags; } /* }}} */ zend_string *zend_concat3(char *str1, size_t str1_len, char *str2, size_t str2_len, char *str3, size_t str3_len) /* {{{ */ { size_t len = str1_len + str2_len + str3_len; zend_string *res = zend_string_alloc(len, 0); memcpy(ZSTR_VAL(res), str1, str1_len); memcpy(ZSTR_VAL(res) + str1_len, str2, str2_len); memcpy(ZSTR_VAL(res) + str1_len + str2_len, str3, str3_len); ZSTR_VAL(res)[len] = '\0'; return res; } zend_string *zend_concat_names(char *name1, size_t name1_len, char *name2, size_t name2_len) { return zend_concat3(name1, name1_len, "\\", 1, name2, name2_len); } zend_string *zend_prefix_with_ns(zend_string *name) { if (FC(current_namespace)) { zend_string *ns = FC(current_namespace); return zend_concat_names(ZSTR_VAL(ns), ZSTR_LEN(ns), ZSTR_VAL(name), ZSTR_LEN(name)); } else { return zend_string_copy(name); } } void *zend_hash_find_ptr_lc(HashTable *ht, const char *str, size_t len) { void *result; zend_string *lcname; ALLOCA_FLAG(use_heap); ZSTR_ALLOCA_ALLOC(lcname, len, use_heap); zend_str_tolower_copy(ZSTR_VAL(lcname), str, len); result = zend_hash_find_ptr(ht, lcname); ZSTR_ALLOCA_FREE(lcname, use_heap); return result; } zend_string *zend_resolve_non_class_name( zend_string *name, uint32_t type, zend_bool *is_fully_qualified, zend_bool case_sensitive, HashTable *current_import_sub ) { char *compound; *is_fully_qualified = 0; if (ZSTR_VAL(name)[0] == '\\') { /* Remove \ prefix (only relevant if this is a string rather than a label) */ *is_fully_qualified = 1; return zend_string_init(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1, 0); } if (type == ZEND_NAME_FQ) { *is_fully_qualified = 1; return zend_string_copy(name); } if (type == ZEND_NAME_RELATIVE) { *is_fully_qualified = 1; return zend_prefix_with_ns(name); } if (current_import_sub) { /* If an unqualified name is a function/const alias, replace it. */ zend_string *import_name; if (case_sensitive) { import_name = zend_hash_find_ptr(current_import_sub, name); } else { import_name = zend_hash_find_ptr_lc(current_import_sub, ZSTR_VAL(name), ZSTR_LEN(name)); } if (import_name) { *is_fully_qualified = 1; return zend_string_copy(import_name); } } compound = memchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)); if (compound) { *is_fully_qualified = 1; } if (compound && FC(imports)) { /* If the first part of a qualified name is an alias, substitute it. */ size_t len = compound - ZSTR_VAL(name); zend_string *import_name = zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), len); if (import_name) { return zend_concat_names( ZSTR_VAL(import_name), ZSTR_LEN(import_name), ZSTR_VAL(name) + len + 1, ZSTR_LEN(name) - len - 1); } } return zend_prefix_with_ns(name); } /* }}} */ zend_string *zend_resolve_function_name(zend_string *name, uint32_t type, zend_bool *is_fully_qualified) /* {{{ */ { return zend_resolve_non_class_name( name, type, is_fully_qualified, 0, FC(imports_function)); } /* }}} */ zend_string *zend_resolve_const_name(zend_string *name, uint32_t type, zend_bool *is_fully_qualified) /* {{{ */ { return zend_resolve_non_class_name( name, type, is_fully_qualified, 1, FC(imports_const)); } /* }}} */ zend_string *zend_resolve_class_name(zend_string *name, uint32_t type) /* {{{ */ { char *compound; if (type == ZEND_NAME_RELATIVE) { return zend_prefix_with_ns(name); } if (type == ZEND_NAME_FQ || ZSTR_VAL(name)[0] == '\\') { /* Remove \ prefix (only relevant if this is a string rather than a label) */ if (ZSTR_VAL(name)[0] == '\\') { name = zend_string_init(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1, 0); } else { zend_string_addref(name); } /* Ensure that \self, \parent and \static are not used */ if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type(name)) { zend_error_noreturn(E_COMPILE_ERROR, "'\\%s' is an invalid class name", ZSTR_VAL(name)); } return name; } if (FC(imports)) { compound = memchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)); if (compound) { /* If the first part of a qualified name is an alias, substitute it. */ size_t len = compound - ZSTR_VAL(name); zend_string *import_name = zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), len); if (import_name) { return zend_concat_names( ZSTR_VAL(import_name), ZSTR_LEN(import_name), ZSTR_VAL(name) + len + 1, ZSTR_LEN(name) - len - 1); } } else { /* If an unqualified name is an alias, replace it. */ zend_string *import_name = zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), ZSTR_LEN(name)); if (import_name) { return zend_string_copy(import_name); } } } /* If not fully qualified and not an alias, prepend the current namespace */ return zend_prefix_with_ns(name); } /* }}} */ zend_string *zend_resolve_class_name_ast(zend_ast *ast) /* {{{ */ { zval *class_name = zend_ast_get_zval(ast); if (Z_TYPE_P(class_name) != IS_STRING) { zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name"); } return zend_resolve_class_name(Z_STR_P(class_name), ast->attr); } /* }}} */ static void label_ptr_dtor(zval *zv) /* {{{ */ { efree_size(Z_PTR_P(zv), sizeof(zend_label)); } /* }}} */ static void str_dtor(zval *zv) /* {{{ */ { zend_string_release_ex(Z_STR_P(zv), 0); } /* }}} */ static zend_bool zend_is_call(zend_ast *ast); static uint32_t zend_add_try_element(uint32_t try_op) /* {{{ */ { zend_op_array *op_array = CG(active_op_array); uint32_t try_catch_offset = op_array->last_try_catch++; zend_try_catch_element *elem; op_array->try_catch_array = safe_erealloc( op_array->try_catch_array, sizeof(zend_try_catch_element), op_array->last_try_catch, 0); elem = &op_array->try_catch_array[try_catch_offset]; elem->try_op = try_op; elem->catch_op = 0; elem->finally_op = 0; elem->finally_end = 0; return try_catch_offset; } /* }}} */ ZEND_API void function_add_ref(zend_function *function) /* {{{ */ { if (function->type == ZEND_USER_FUNCTION) { zend_op_array *op_array = &function->op_array; if (op_array->refcount) { (*op_array->refcount)++; } if (op_array->static_variables) { if (!(GC_FLAGS(op_array->static_variables) & IS_ARRAY_IMMUTABLE)) { GC_ADDREF(op_array->static_variables); } } if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) { ZEND_ASSERT(op_array->fn_flags & ZEND_ACC_PRELOADED); ZEND_MAP_PTR_NEW(op_array->run_time_cache); ZEND_MAP_PTR_NEW(op_array->static_variables_ptr); } else { ZEND_MAP_PTR_INIT(op_array->static_variables_ptr, &op_array->static_variables); ZEND_MAP_PTR_INIT(op_array->run_time_cache, zend_arena_alloc(&CG(arena), sizeof(void*))); ZEND_MAP_PTR_SET(op_array->run_time_cache, NULL); } } else if (function->type == ZEND_INTERNAL_FUNCTION) { if (function->common.function_name) { zend_string_addref(function->common.function_name); } } } /* }}} */ static zend_never_inline ZEND_COLD ZEND_NORETURN void do_bind_function_error(zend_string *lcname, zend_op_array *op_array, zend_bool compile_time) /* {{{ */ { zval *zv = zend_hash_find_ex(compile_time ? CG(function_table) : EG(function_table), lcname, 1); int error_level = compile_time ? E_COMPILE_ERROR : E_ERROR; zend_function *old_function; ZEND_ASSERT(zv != NULL); old_function = (zend_function*)Z_PTR_P(zv); if (old_function->type == ZEND_USER_FUNCTION && old_function->op_array.last > 0) { zend_error_noreturn(error_level, "Cannot redeclare %s() (previously declared in %s:%d)", op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name), ZSTR_VAL(old_function->op_array.filename), old_function->op_array.opcodes[0].lineno); } else { zend_error_noreturn(error_level, "Cannot redeclare %s()", op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name)); } } ZEND_API int do_bind_function(zval *lcname) /* {{{ */ { zend_function *function; zval *rtd_key, *zv; rtd_key = lcname + 1; zv = zend_hash_find_ex(EG(function_table), Z_STR_P(rtd_key), 1); if (UNEXPECTED(!zv)) { do_bind_function_error(Z_STR_P(lcname), NULL, 0); return FAILURE; } function = (zend_function*)Z_PTR_P(zv); zv = zend_hash_set_bucket_key(EG(function_table), (Bucket*)zv, Z_STR_P(lcname)); if (UNEXPECTED(!zv)) { do_bind_function_error(Z_STR_P(lcname), &function->op_array, 0); return FAILURE; } return SUCCESS; } /* }}} */ ZEND_API int do_bind_class(zval *lcname, zend_string *lc_parent_name) /* {{{ */ { zend_class_entry *ce; zval *rtd_key, *zv; rtd_key = lcname + 1; zv = zend_hash_find_ex(EG(class_table), Z_STR_P(rtd_key), 1); if (UNEXPECTED(!zv)) { ce = zend_hash_find_ptr(EG(class_table), Z_STR_P(lcname)); if (ce) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare %s %s, because the name is already in use", zend_get_object_type(ce), ZSTR_VAL(ce->name)); return FAILURE; } else { do { ZEND_ASSERT(EG(current_execute_data)->func->op_array.fn_flags & ZEND_ACC_PRELOADED); if (zend_preload_autoload && zend_preload_autoload(EG(current_execute_data)->func->op_array.filename) == SUCCESS) { zv = zend_hash_find_ex(EG(class_table), Z_STR_P(rtd_key), 1); if (EXPECTED(zv != NULL)) { break; } } zend_error_noreturn(E_ERROR, "Class %s wasn't preloaded", Z_STRVAL_P(lcname)); return FAILURE; } while (0); } } /* Register the derived class */ ce = (zend_class_entry*)Z_PTR_P(zv); zv = zend_hash_set_bucket_key(EG(class_table), (Bucket*)zv, Z_STR_P(lcname)); if (UNEXPECTED(!zv)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare %s %s, because the name is already in use", zend_get_object_type(ce), ZSTR_VAL(ce->name)); return FAILURE; } if (zend_do_link_class(ce, lc_parent_name) == FAILURE) { /* Reload bucket pointer, the hash table may have been reallocated */ zv = zend_hash_find(EG(class_table), Z_STR_P(lcname)); zend_hash_set_bucket_key(EG(class_table), (Bucket *) zv, Z_STR_P(rtd_key)); return FAILURE; } return SUCCESS; } /* }}} */ static void zend_mark_function_as_generator() /* {{{ */ { if (!CG(active_op_array)->function_name) { zend_error_noreturn(E_COMPILE_ERROR, "The \"yield\" expression can only be used inside a function"); } if (CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) { zend_arg_info return_info = CG(active_op_array)->arg_info[-1]; if (ZEND_TYPE_CODE(return_info.type) != IS_ITERABLE) { const char *msg = "Generators may only declare a return type of Generator, Iterator, Traversable, or iterable, %s is not permitted"; if (!ZEND_TYPE_IS_CLASS(return_info.type)) { zend_error_noreturn(E_COMPILE_ERROR, msg, zend_get_type_by_const(ZEND_TYPE_CODE(return_info.type))); } if (!zend_string_equals_literal_ci(ZEND_TYPE_NAME(return_info.type), "Traversable") && !zend_string_equals_literal_ci(ZEND_TYPE_NAME(return_info.type), "Iterator") && !zend_string_equals_literal_ci(ZEND_TYPE_NAME(return_info.type), "Generator")) { zend_error_noreturn(E_COMPILE_ERROR, msg, ZSTR_VAL(ZEND_TYPE_NAME(return_info.type))); } } } CG(active_op_array)->fn_flags |= ZEND_ACC_GENERATOR; } /* }}} */ ZEND_API uint32_t zend_build_delayed_early_binding_list(const zend_op_array *op_array) /* {{{ */ { if (op_array->fn_flags & ZEND_ACC_EARLY_BINDING) { uint32_t first_early_binding_opline = (uint32_t)-1; uint32_t *prev_opline_num = &first_early_binding_opline; zend_op *opline = op_array->opcodes; zend_op *end = opline + op_array->last; while (opline < end) { if (opline->opcode == ZEND_DECLARE_CLASS_DELAYED) { *prev_opline_num = opline - op_array->opcodes; prev_opline_num = &opline->result.opline_num; } ++opline; } *prev_opline_num = -1; return first_early_binding_opline; } return (uint32_t)-1; } /* }}} */ ZEND_API void zend_do_delayed_early_binding(zend_op_array *op_array, uint32_t first_early_binding_opline) /* {{{ */ { if (first_early_binding_opline != (uint32_t)-1) { zend_bool orig_in_compilation = CG(in_compilation); uint32_t opline_num = first_early_binding_opline; void **run_time_cache; if (!ZEND_MAP_PTR(op_array->run_time_cache)) { void *ptr; ZEND_ASSERT(op_array->fn_flags & ZEND_ACC_HEAP_RT_CACHE); ptr = emalloc(op_array->cache_size + sizeof(void*)); ZEND_MAP_PTR_INIT(op_array->run_time_cache, ptr); ptr = (char*)ptr + sizeof(void*); ZEND_MAP_PTR_SET(op_array->run_time_cache, ptr); memset(ptr, 0, op_array->cache_size); } run_time_cache = RUN_TIME_CACHE(op_array); CG(in_compilation) = 1; while (opline_num != (uint32_t)-1) { const zend_op *opline = &op_array->opcodes[opline_num]; zval *lcname = RT_CONSTANT(opline, opline->op1); zval *zv = zend_hash_find_ex(EG(class_table), Z_STR_P(lcname + 1), 1); if (zv) { zend_class_entry *ce = Z_CE_P(zv); zend_string *lc_parent_name = Z_STR_P(RT_CONSTANT(opline, opline->op2)); zend_class_entry *parent_ce = zend_hash_find_ex_ptr(EG(class_table), lc_parent_name, 1); if (parent_ce) { if (zend_try_early_bind(ce, parent_ce, Z_STR_P(lcname), zv)) { /* Store in run-time cache */ ((void**)((char*)run_time_cache + opline->extended_value))[0] = ce; } } } opline_num = op_array->opcodes[opline_num].result.opline_num; } CG(in_compilation) = orig_in_compilation; } } /* }}} */ ZEND_API zend_string *zend_mangle_property_name(const char *src1, size_t src1_length, const char *src2, size_t src2_length, int internal) /* {{{ */ { size_t prop_name_length = 1 + src1_length + 1 + src2_length; zend_string *prop_name = zend_string_alloc(prop_name_length, internal); ZSTR_VAL(prop_name)[0] = '\0'; memcpy(ZSTR_VAL(prop_name) + 1, src1, src1_length+1); memcpy(ZSTR_VAL(prop_name) + 1 + src1_length + 1, src2, src2_length+1); return prop_name; } /* }}} */ static zend_always_inline size_t zend_strnlen(const char* s, size_t maxlen) /* {{{ */ { size_t len = 0; while (*s++ && maxlen--) len++; return len; } /* }}} */ ZEND_API int zend_unmangle_property_name_ex(const zend_string *name, const char **class_name, const char **prop_name, size_t *prop_len) /* {{{ */ { size_t class_name_len; size_t anonclass_src_len; *class_name = NULL; if (!ZSTR_LEN(name) || ZSTR_VAL(name)[0] != '\0') { *prop_name = ZSTR_VAL(name); if (prop_len) { *prop_len = ZSTR_LEN(name); } return SUCCESS; } if (ZSTR_LEN(name) < 3 || ZSTR_VAL(name)[1] == '\0') { zend_error(E_NOTICE, "Illegal member variable name"); *prop_name = ZSTR_VAL(name); if (prop_len) { *prop_len = ZSTR_LEN(name); } return FAILURE; } class_name_len = zend_strnlen(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 2); if (class_name_len >= ZSTR_LEN(name) - 2 || ZSTR_VAL(name)[class_name_len + 1] != '\0') { zend_error(E_NOTICE, "Corrupt member variable name"); *prop_name = ZSTR_VAL(name); if (prop_len) { *prop_len = ZSTR_LEN(name); } return FAILURE; } *class_name = ZSTR_VAL(name) + 1; anonclass_src_len = zend_strnlen(*class_name + class_name_len + 1, ZSTR_LEN(name) - class_name_len - 2); if (class_name_len + anonclass_src_len + 2 != ZSTR_LEN(name)) { class_name_len += anonclass_src_len + 1; } *prop_name = ZSTR_VAL(name) + class_name_len + 2; if (prop_len) { *prop_len = ZSTR_LEN(name) - class_name_len - 2; } return SUCCESS; } /* }}} */ static zend_constant *zend_lookup_reserved_const(const char *name, size_t len) /* {{{ */ { zend_constant *c = zend_hash_find_ptr_lc(EG(zend_constants), name, len); if (c && !(ZEND_CONSTANT_FLAGS(c) & CONST_CS) && (ZEND_CONSTANT_FLAGS(c) & CONST_CT_SUBST)) { return c; } return NULL; } /* }}} */ static zend_bool zend_try_ct_eval_const(zval *zv, zend_string *name, zend_bool is_fully_qualified) /* {{{ */ { zend_constant *c; /* Substitute case-sensitive (or lowercase) constants */ c = zend_hash_find_ptr(EG(zend_constants), name); if (c && ( ((ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT) && !(CG(compiler_options) & ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION) && (!(ZEND_CONSTANT_FLAGS(c) & CONST_NO_FILE_CACHE) || !(CG(compiler_options) & ZEND_COMPILE_WITH_FILE_CACHE))) || (Z_TYPE(c->value) < IS_OBJECT && !(CG(compiler_options) & ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION)) )) { ZVAL_COPY_OR_DUP(zv, &c->value); return 1; } { /* Substitute true, false and null (including unqualified usage in namespaces) */ const char *lookup_name = ZSTR_VAL(name); size_t lookup_len = ZSTR_LEN(name); if (!is_fully_qualified) { zend_get_unqualified_name(name, &lookup_name, &lookup_len); } c = zend_lookup_reserved_const(lookup_name, lookup_len); if (c) { ZVAL_COPY_OR_DUP(zv, &c->value); return 1; } } return 0; } /* }}} */ static inline zend_bool zend_is_scope_known() /* {{{ */ { if (CG(active_op_array)->fn_flags & ZEND_ACC_CLOSURE) { /* Closures can be rebound to a different scope */ return 0; } if (!CG(active_class_entry)) { /* The scope is known if we're in a free function (no scope), but not if we're in * a file/eval (which inherits including/eval'ing scope). */ return CG(active_op_array)->function_name != NULL; } /* For traits self etc refers to the using class, not the trait itself */ return (CG(active_class_entry)->ce_flags & ZEND_ACC_TRAIT) == 0; } /* }}} */ static inline zend_bool class_name_refers_to_active_ce(zend_string *class_name, uint32_t fetch_type) /* {{{ */ { if (!CG(active_class_entry)) { return 0; } if (fetch_type == ZEND_FETCH_CLASS_SELF && zend_is_scope_known()) { return 1; } return fetch_type == ZEND_FETCH_CLASS_DEFAULT && zend_string_equals_ci(class_name, CG(active_class_entry)->name); } /* }}} */ uint32_t zend_get_class_fetch_type(zend_string *name) /* {{{ */ { if (zend_string_equals_literal_ci(name, "self")) { return ZEND_FETCH_CLASS_SELF; } else if (zend_string_equals_literal_ci(name, "parent")) { return ZEND_FETCH_CLASS_PARENT; } else if (zend_string_equals_literal_ci(name, "static")) { return ZEND_FETCH_CLASS_STATIC; } else { return ZEND_FETCH_CLASS_DEFAULT; } } /* }}} */ static uint32_t zend_get_class_fetch_type_ast(zend_ast *name_ast) /* {{{ */ { /* Fully qualified names are always default refs */ if (name_ast->attr == ZEND_NAME_FQ) { return ZEND_FETCH_CLASS_DEFAULT; } return zend_get_class_fetch_type(zend_ast_get_str(name_ast)); } /* }}} */ static void zend_ensure_valid_class_fetch_type(uint32_t fetch_type) /* {{{ */ { if (fetch_type != ZEND_FETCH_CLASS_DEFAULT && zend_is_scope_known()) { zend_class_entry *ce = CG(active_class_entry); if (!ce) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use \"%s\" when no class scope is active", fetch_type == ZEND_FETCH_CLASS_SELF ? "self" : fetch_type == ZEND_FETCH_CLASS_PARENT ? "parent" : "static"); } else if (fetch_type == ZEND_FETCH_CLASS_PARENT && !ce->parent_name) { zend_error(E_DEPRECATED, "Cannot use \"parent\" when current class scope has no parent"); } } } /* }}} */ static zend_bool zend_try_compile_const_expr_resolve_class_name(zval *zv, zend_ast *class_ast) /* {{{ */ { uint32_t fetch_type; zval *class_name; if (class_ast->kind != ZEND_AST_ZVAL) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use ::class with dynamic class name"); } class_name = zend_ast_get_zval(class_ast); if (Z_TYPE_P(class_name) != IS_STRING) { zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name"); } fetch_type = zend_get_class_fetch_type(Z_STR_P(class_name)); zend_ensure_valid_class_fetch_type(fetch_type); switch (fetch_type) { case ZEND_FETCH_CLASS_SELF: if (CG(active_class_entry) && zend_is_scope_known()) { ZVAL_STR_COPY(zv, CG(active_class_entry)->name); return 1; } return 0; case ZEND_FETCH_CLASS_PARENT: if (CG(active_class_entry) && CG(active_class_entry)->parent_name && zend_is_scope_known()) { ZVAL_STR_COPY(zv, CG(active_class_entry)->parent_name); return 1; } return 0; case ZEND_FETCH_CLASS_STATIC: return 0; case ZEND_FETCH_CLASS_DEFAULT: ZVAL_STR(zv, zend_resolve_class_name_ast(class_ast)); return 1; EMPTY_SWITCH_DEFAULT_CASE() } } /* }}} */ /* We don't use zend_verify_const_access because we need to deal with unlinked classes. */ static zend_bool zend_verify_ct_const_access(zend_class_constant *c, zend_class_entry *scope) { if (Z_ACCESS_FLAGS(c->value) & ZEND_ACC_PUBLIC) { return 1; } else if (Z_ACCESS_FLAGS(c->value) & ZEND_ACC_PRIVATE) { return c->ce == scope; } else { zend_class_entry *ce = c->ce; while (1) { if (ce == scope) { return 1; } if (!ce->parent) { break; } if (ce->ce_flags & ZEND_ACC_RESOLVED_PARENT) { ce = ce->parent; } else { ce = zend_hash_find_ptr_lc(CG(class_table), ZSTR_VAL(ce->parent_name), ZSTR_LEN(ce->parent_name)); if (!ce) { break; } } } /* Reverse case cannot be true during compilation */ return 0; } } static zend_bool zend_try_ct_eval_class_const(zval *zv, zend_string *class_name, zend_string *name) /* {{{ */ { uint32_t fetch_type = zend_get_class_fetch_type(class_name); zend_class_constant *cc; zval *c; if (class_name_refers_to_active_ce(class_name, fetch_type)) { cc = zend_hash_find_ptr(&CG(active_class_entry)->constants_table, name); } else if (fetch_type == ZEND_FETCH_CLASS_DEFAULT && !(CG(compiler_options) & ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION)) { zend_class_entry *ce = zend_hash_find_ptr_lc(CG(class_table), ZSTR_VAL(class_name), ZSTR_LEN(class_name)); if (ce) { cc = zend_hash_find_ptr(&ce->constants_table, name); } else { return 0; } } else { return 0; } if (CG(compiler_options) & ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION) { return 0; } if (!cc || !zend_verify_ct_const_access(cc, CG(active_class_entry))) { return 0; } c = &cc->value; /* Substitute case-sensitive (or lowercase) persistent class constants */ if (Z_TYPE_P(c) < IS_OBJECT) { ZVAL_COPY_OR_DUP(zv, c); return 1; } return 0; } /* }}} */ static void zend_add_to_list(void *result, void *item) /* {{{ */ { void** list = *(void**)result; size_t n = 0; if (list) { while (list[n]) { n++; } } list = erealloc(list, sizeof(void*) * (n+2)); list[n] = item; list[n+1] = NULL; *(void**)result = list; } /* }}} */ void zend_do_extended_stmt(void) /* {{{ */ { zend_op *opline; if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT)) { return; } opline = get_next_op(); opline->opcode = ZEND_EXT_STMT; } /* }}} */ void zend_do_extended_fcall_begin(void) /* {{{ */ { zend_op *opline; if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_FCALL)) { return; } opline = get_next_op(); opline->opcode = ZEND_EXT_FCALL_BEGIN; } /* }}} */ void zend_do_extended_fcall_end(void) /* {{{ */ { zend_op *opline; if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_FCALL)) { return; } opline = get_next_op(); opline->opcode = ZEND_EXT_FCALL_END; } /* }}} */ zend_bool zend_is_auto_global_str(char *name, size_t len) /* {{{ */ { zend_auto_global *auto_global; if ((auto_global = zend_hash_str_find_ptr(CG(auto_globals), name, len)) != NULL) { if (auto_global->armed) { auto_global->armed = auto_global->auto_global_callback(auto_global->name); } return 1; } return 0; } /* }}} */ zend_bool zend_is_auto_global(zend_string *name) /* {{{ */ { zend_auto_global *auto_global; if ((auto_global = zend_hash_find_ptr(CG(auto_globals), name)) != NULL) { if (auto_global->armed) { auto_global->armed = auto_global->auto_global_callback(auto_global->name); } return 1; } return 0; } /* }}} */ int zend_register_auto_global(zend_string *name, zend_bool jit, zend_auto_global_callback auto_global_callback) /* {{{ */ { zend_auto_global auto_global; int retval; auto_global.name = name; auto_global.auto_global_callback = auto_global_callback; auto_global.jit = jit; retval = zend_hash_add_mem(CG(auto_globals), auto_global.name, &auto_global, sizeof(zend_auto_global)) != NULL ? SUCCESS : FAILURE; return retval; } /* }}} */ ZEND_API void zend_activate_auto_globals(void) /* {{{ */ { zend_auto_global *auto_global; ZEND_HASH_FOREACH_PTR(CG(auto_globals), auto_global) { if (auto_global->jit) { auto_global->armed = 1; } else if (auto_global->auto_global_callback) { auto_global->armed = auto_global->auto_global_callback(auto_global->name); } else { auto_global->armed = 0; } } ZEND_HASH_FOREACH_END(); } /* }}} */ int ZEND_FASTCALL zendlex(zend_parser_stack_elem *elem) /* {{{ */ { zval zv; int ret; if (CG(increment_lineno)) { CG(zend_lineno)++; CG(increment_lineno) = 0; } ret = lex_scan(&zv, elem); ZEND_ASSERT(!EG(exception) || ret == T_ERROR); return ret; } /* }}} */ ZEND_API void zend_initialize_class_data(zend_class_entry *ce, zend_bool nullify_handlers) /* {{{ */ { zend_bool persistent_hashes = ce->type == ZEND_INTERNAL_CLASS; ce->refcount = 1; ce->ce_flags = ZEND_ACC_CONSTANTS_UPDATED; if (CG(compiler_options) & ZEND_COMPILE_GUARDS) { ce->ce_flags |= ZEND_ACC_USE_GUARDS; } ce->default_properties_table = NULL; ce->default_static_members_table = NULL; zend_hash_init_ex(&ce->properties_info, 8, NULL, (persistent_hashes ? zend_destroy_property_info_internal : NULL), persistent_hashes, 0); zend_hash_init_ex(&ce->constants_table, 8, NULL, NULL, persistent_hashes, 0); zend_hash_init_ex(&ce->function_table, 8, NULL, ZEND_FUNCTION_DTOR, persistent_hashes, 0); if (ce->type == ZEND_INTERNAL_CLASS) { ZEND_MAP_PTR_INIT(ce->static_members_table, NULL); } else { ZEND_MAP_PTR_INIT(ce->static_members_table, &ce->default_static_members_table); ce->info.user.doc_comment = NULL; } ce->default_properties_count = 0; ce->default_static_members_count = 0; ce->properties_info_table = NULL; if (nullify_handlers) { ce->constructor = NULL; ce->destructor = NULL; ce->clone = NULL; ce->__get = NULL; ce->__set = NULL; ce->__unset = NULL; ce->__isset = NULL; ce->__call = NULL; ce->__callstatic = NULL; ce->__tostring = NULL; ce->create_object = NULL; ce->get_iterator = NULL; ce->iterator_funcs_ptr = NULL; ce->get_static_method = NULL; ce->parent = NULL; ce->parent_name = NULL; ce->num_interfaces = 0; ce->interfaces = NULL; ce->num_traits = 0; ce->trait_names = NULL; ce->trait_aliases = NULL; ce->trait_precedences = NULL; ce->serialize = NULL; ce->unserialize = NULL; ce->serialize_func = NULL; ce->unserialize_func = NULL; ce->__debugInfo = NULL; if (ce->type == ZEND_INTERNAL_CLASS) { ce->info.internal.module = NULL; ce->info.internal.builtin_functions = NULL; } } } /* }}} */ ZEND_API zend_string *zend_get_compiled_variable_name(const zend_op_array *op_array, uint32_t var) /* {{{ */ { return op_array->vars[EX_VAR_TO_NUM(var)]; } /* }}} */ zend_ast *zend_ast_append_str(zend_ast *left_ast, zend_ast *right_ast) /* {{{ */ { zval *left_zv = zend_ast_get_zval(left_ast); zend_string *left = Z_STR_P(left_zv); zend_string *right = zend_ast_get_str(right_ast); zend_string *result; size_t left_len = ZSTR_LEN(left); size_t len = left_len + ZSTR_LEN(right) + 1; /* left\right */ result = zend_string_extend(left, len, 0); ZSTR_VAL(result)[left_len] = '\\'; memcpy(&ZSTR_VAL(result)[left_len + 1], ZSTR_VAL(right), ZSTR_LEN(right)); ZSTR_VAL(result)[len] = '\0'; zend_string_release_ex(right, 0); ZVAL_STR(left_zv, result); return left_ast; } /* }}} */ zend_ast *zend_negate_num_string(zend_ast *ast) /* {{{ */ { zval *zv = zend_ast_get_zval(ast); if (Z_TYPE_P(zv) == IS_LONG) { if (Z_LVAL_P(zv) == 0) { ZVAL_NEW_STR(zv, zend_string_init("-0", sizeof("-0")-1, 0)); } else { ZEND_ASSERT(Z_LVAL_P(zv) > 0); Z_LVAL_P(zv) *= -1; } } else if (Z_TYPE_P(zv) == IS_STRING) { size_t orig_len = Z_STRLEN_P(zv); Z_STR_P(zv) = zend_string_extend(Z_STR_P(zv), orig_len + 1, 0); memmove(Z_STRVAL_P(zv) + 1, Z_STRVAL_P(zv), orig_len + 1); Z_STRVAL_P(zv)[0] = '-'; } else { ZEND_ASSERT(0); } return ast; } /* }}} */ void zend_verify_namespace(void) /* {{{ */ { if (FC(has_bracketed_namespaces) && !FC(in_namespace)) { zend_error_noreturn(E_COMPILE_ERROR, "No code may exist outside of namespace {}"); } } /* }}} */ /* {{{ zend_dirname Returns directory name component of path */ ZEND_API size_t zend_dirname(char *path, size_t len) { register char *end = path + len - 1; unsigned int len_adjust = 0; #ifdef ZEND_WIN32 /* Note that on Win32 CWD is per drive (heritage from CP/M). * This means dirname("c:foo") maps to "c:." or "c:" - which means CWD on C: drive. */ if ((2 <= len) && isalpha((int)((unsigned char *)path)[0]) && (':' == path[1])) { /* Skip over the drive spec (if any) so as not to change */ path += 2; len_adjust += 2; if (2 == len) { /* Return "c:" on Win32 for dirname("c:"). * It would be more consistent to return "c:." * but that would require making the string *longer*. */ return len; } } #endif if (len == 0) { /* Illegal use of this function */ return 0; } /* Strip trailing slashes */ while (end >= path && IS_SLASH_P(end)) { end--; } if (end < path) { /* The path only contained slashes */ path[0] = DEFAULT_SLASH; path[1] = '\0'; return 1 + len_adjust; } /* Strip filename */ while (end >= path && !IS_SLASH_P(end)) { end--; } if (end < path) { /* No slash found, therefore return '.' */ path[0] = '.'; path[1] = '\0'; return 1 + len_adjust; } /* Strip slashes which came before the file name */ while (end >= path && IS_SLASH_P(end)) { end--; } if (end < path) { path[0] = DEFAULT_SLASH; path[1] = '\0'; return 1 + len_adjust; } *(end+1) = '\0'; return (size_t)(end + 1 - path) + len_adjust; } /* }}} */ static void zend_adjust_for_fetch_type(zend_op *opline, znode *result, uint32_t type) /* {{{ */ { zend_uchar factor = (opline->opcode == ZEND_FETCH_STATIC_PROP_R) ? 1 : 3; switch (type) { case BP_VAR_R: opline->result_type = IS_TMP_VAR; result->op_type = IS_TMP_VAR; return; case BP_VAR_W: opline->opcode += 1 * factor; return; case BP_VAR_RW: opline->opcode += 2 * factor; return; case BP_VAR_IS: opline->result_type = IS_TMP_VAR; result->op_type = IS_TMP_VAR; opline->opcode += 3 * factor; return; case BP_VAR_FUNC_ARG: opline->opcode += 4 * factor; return; case BP_VAR_UNSET: opline->opcode += 5 * factor; return; EMPTY_SWITCH_DEFAULT_CASE() } } /* }}} */ static inline void zend_make_var_result(znode *result, zend_op *opline) /* {{{ */ { opline->result_type = IS_VAR; opline->result.var = get_temporary_variable(); GET_NODE(result, opline->result); } /* }}} */ static inline void zend_make_tmp_result(znode *result, zend_op *opline) /* {{{ */ { opline->result_type = IS_TMP_VAR; opline->result.var = get_temporary_variable(); GET_NODE(result, opline->result); } /* }}} */ static zend_op *zend_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */ { zend_op *opline = get_next_op(); opline->opcode = opcode; if (op1 != NULL) { SET_NODE(opline->op1, op1); } if (op2 != NULL) { SET_NODE(opline->op2, op2); } if (result) { zend_make_var_result(result, opline); } return opline; } /* }}} */ static zend_op *zend_emit_op_tmp(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */ { zend_op *opline = get_next_op(); opline->opcode = opcode; if (op1 != NULL) { SET_NODE(opline->op1, op1); } if (op2 != NULL) { SET_NODE(opline->op2, op2); } if (result) { zend_make_tmp_result(result, opline); } return opline; } /* }}} */ static void zend_emit_tick(void) /* {{{ */ { zend_op *opline; /* This prevents a double TICK generated by the parser statement of "declare()" */ if (CG(active_op_array)->last && CG(active_op_array)->opcodes[CG(active_op_array)->last - 1].opcode == ZEND_TICKS) { return; } opline = get_next_op(); opline->opcode = ZEND_TICKS; opline->extended_value = FC(declarables).ticks; } /* }}} */ static inline zend_op *zend_emit_op_data(znode *value) /* {{{ */ { return zend_emit_op(NULL, ZEND_OP_DATA, value, NULL); } /* }}} */ static inline uint32_t zend_emit_jump(uint32_t opnum_target) /* {{{ */ { uint32_t opnum = get_next_op_number(); zend_op *opline = zend_emit_op(NULL, ZEND_JMP, NULL, NULL); opline->op1.opline_num = opnum_target; return opnum; } /* }}} */ ZEND_API int zend_is_smart_branch(zend_op *opline) /* {{{ */ { switch (opline->opcode) { case ZEND_IS_IDENTICAL: case ZEND_IS_NOT_IDENTICAL: case ZEND_IS_EQUAL: case ZEND_IS_NOT_EQUAL: case ZEND_IS_SMALLER: case ZEND_IS_SMALLER_OR_EQUAL: case ZEND_CASE: case ZEND_ISSET_ISEMPTY_CV: case ZEND_ISSET_ISEMPTY_VAR: case ZEND_ISSET_ISEMPTY_DIM_OBJ: case ZEND_ISSET_ISEMPTY_PROP_OBJ: case ZEND_ISSET_ISEMPTY_STATIC_PROP: case ZEND_INSTANCEOF: case ZEND_TYPE_CHECK: case ZEND_DEFINED: case ZEND_IN_ARRAY: case ZEND_ARRAY_KEY_EXISTS: return 1; default: return 0; } } /* }}} */ static inline uint32_t zend_emit_cond_jump(zend_uchar opcode, znode *cond, uint32_t opnum_target) /* {{{ */ { uint32_t opnum = get_next_op_number(); zend_op *opline; if ((cond->op_type & (IS_CV|IS_CONST)) && opnum > 0 && zend_is_smart_branch(CG(active_op_array)->opcodes + opnum - 1)) { /* emit extra NOP to avoid incorrect SMART_BRANCH in very rare cases */ zend_emit_op(NULL, ZEND_NOP, NULL, NULL); opnum = get_next_op_number(); } opline = zend_emit_op(NULL, opcode, cond, NULL); opline->op2.opline_num = opnum_target; return opnum; } /* }}} */ static inline void zend_update_jump_target(uint32_t opnum_jump, uint32_t opnum_target) /* {{{ */ { zend_op *opline = &CG(active_op_array)->opcodes[opnum_jump]; switch (opline->opcode) { case ZEND_JMP: opline->op1.opline_num = opnum_target; break; case ZEND_JMPZ: case ZEND_JMPNZ: case ZEND_JMPZ_EX: case ZEND_JMPNZ_EX: case ZEND_JMP_SET: case ZEND_COALESCE: opline->op2.opline_num = opnum_target; break; EMPTY_SWITCH_DEFAULT_CASE() } } /* }}} */ static inline void zend_update_jump_target_to_next(uint32_t opnum_jump) /* {{{ */ { zend_update_jump_target(opnum_jump, get_next_op_number()); } /* }}} */ static inline zend_op *zend_delayed_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */ { zend_op tmp_opline; init_op(&tmp_opline); tmp_opline.opcode = opcode; if (op1 != NULL) { SET_NODE(tmp_opline.op1, op1); } if (op2 != NULL) { SET_NODE(tmp_opline.op2, op2); } if (result) { zend_make_var_result(result, &tmp_opline); } zend_stack_push(&CG(delayed_oplines_stack), &tmp_opline); return zend_stack_top(&CG(delayed_oplines_stack)); } /* }}} */ static inline uint32_t zend_delayed_compile_begin(void) /* {{{ */ { return zend_stack_count(&CG(delayed_oplines_stack)); } /* }}} */ static zend_op *zend_delayed_compile_end(uint32_t offset) /* {{{ */ { zend_op *opline = NULL, *oplines = zend_stack_base(&CG(delayed_oplines_stack)); uint32_t i, count = zend_stack_count(&CG(delayed_oplines_stack)); ZEND_ASSERT(count >= offset); for (i = offset; i < count; ++i) { opline = get_next_op(); memcpy(opline, &oplines[i], sizeof(zend_op)); } CG(delayed_oplines_stack).top = offset; return opline; } /* }}} */ #define ZEND_MEMOIZE_NONE 0 #define ZEND_MEMOIZE_COMPILE 1 #define ZEND_MEMOIZE_FETCH 2 static void zend_compile_memoized_expr(znode *result, zend_ast *expr) /* {{{ */ { int memoize_mode = CG(memoize_mode); if (memoize_mode == ZEND_MEMOIZE_COMPILE) { znode memoized_result; /* Go through normal compilation */ CG(memoize_mode) = ZEND_MEMOIZE_NONE; zend_compile_expr(result, expr); CG(memoize_mode) = ZEND_MEMOIZE_COMPILE; if (result->op_type == IS_VAR) { zend_emit_op(&memoized_result, ZEND_COPY_TMP, result, NULL); } else if (result->op_type == IS_TMP_VAR) { zend_emit_op_tmp(&memoized_result, ZEND_COPY_TMP, result, NULL); } else { if (result->op_type == IS_CONST) { Z_TRY_ADDREF(result->u.constant); } memoized_result = *result; } zend_hash_index_update_mem( CG(memoized_exprs), (uintptr_t) expr, &memoized_result, sizeof(znode)); } else if (memoize_mode == ZEND_MEMOIZE_FETCH) { znode *memoized_result = zend_hash_index_find_ptr(CG(memoized_exprs), (uintptr_t) expr); *result = *memoized_result; if (result->op_type == IS_CONST) { Z_TRY_ADDREF(result->u.constant); } } else { ZEND_ASSERT(0); } } /* }}} */ static void zend_emit_return_type_check( znode *expr, zend_arg_info *return_info, zend_bool implicit) /* {{{ */ { if (ZEND_TYPE_IS_SET(return_info->type)) { zend_op *opline; /* `return ...;` is illegal in a void function (but `return;` isn't) */ if (ZEND_TYPE_CODE(return_info->type) == IS_VOID) { if (expr) { if (expr->op_type == IS_CONST && Z_TYPE(expr->u.constant) == IS_NULL) { zend_error_noreturn(E_COMPILE_ERROR, "A void function must not return a value " "(did you mean \"return;\" instead of \"return null;\"?)"); } else { zend_error_noreturn(E_COMPILE_ERROR, "A void function must not return a value"); } } /* we don't need run-time check */ return; } if (!expr && !implicit) { if (ZEND_TYPE_ALLOW_NULL(return_info->type)) { zend_error_noreturn(E_COMPILE_ERROR, "A function with return type must return a value " "(did you mean \"return null;\" instead of \"return;\"?)"); } else { zend_error_noreturn(E_COMPILE_ERROR, "A function with return type must return a value"); } } if (expr && expr->op_type == IS_CONST) { if ((ZEND_TYPE_CODE(return_info->type) == Z_TYPE(expr->u.constant)) ||((ZEND_TYPE_CODE(return_info->type) == _IS_BOOL) && (Z_TYPE(expr->u.constant) == IS_FALSE || Z_TYPE(expr->u.constant) == IS_TRUE)) || (ZEND_TYPE_ALLOW_NULL(return_info->type) && Z_TYPE(expr->u.constant) == IS_NULL)) { /* we don't need run-time check */ return; } } opline = zend_emit_op(NULL, ZEND_VERIFY_RETURN_TYPE, expr, NULL); if (expr && expr->op_type == IS_CONST) { opline->result_type = expr->op_type = IS_TMP_VAR; opline->result.var = expr->u.op.var = get_temporary_variable(); } if (ZEND_TYPE_IS_CLASS(return_info->type)) { opline->op2.num = CG(active_op_array)->cache_size; CG(active_op_array)->cache_size += sizeof(void*); } else { opline->op2.num = -1; } } } /* }}} */ void zend_emit_final_return(int return_one) /* {{{ */ { znode zn; zend_op *ret; zend_bool returns_reference = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0; if (CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE && !(CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR)) { zend_emit_return_type_check(NULL, CG(active_op_array)->arg_info - 1, 1); } zn.op_type = IS_CONST; if (return_one) { ZVAL_LONG(&zn.u.constant, 1); } else { ZVAL_NULL(&zn.u.constant); } ret = zend_emit_op(NULL, returns_reference ? ZEND_RETURN_BY_REF : ZEND_RETURN, &zn, NULL); ret->extended_value = -1; } /* }}} */ static inline zend_bool zend_is_variable(zend_ast *ast) /* {{{ */ { return ast->kind == ZEND_AST_VAR || ast->kind == ZEND_AST_DIM || ast->kind == ZEND_AST_PROP || ast->kind == ZEND_AST_STATIC_PROP; } /* }}} */ static inline zend_bool zend_is_call(zend_ast *ast) /* {{{ */ { return ast->kind == ZEND_AST_CALL || ast->kind == ZEND_AST_METHOD_CALL || ast->kind == ZEND_AST_STATIC_CALL; } /* }}} */ static inline zend_bool zend_is_variable_or_call(zend_ast *ast) /* {{{ */ { return zend_is_variable(ast) || zend_is_call(ast); } /* }}} */ static inline zend_bool zend_is_unticked_stmt(zend_ast *ast) /* {{{ */ { return ast->kind == ZEND_AST_STMT_LIST || ast->kind == ZEND_AST_LABEL || ast->kind == ZEND_AST_PROP_DECL || ast->kind == ZEND_AST_CLASS_CONST_DECL || ast->kind == ZEND_AST_USE_TRAIT || ast->kind == ZEND_AST_METHOD; } /* }}} */ static inline zend_bool zend_can_write_to_variable(zend_ast *ast) /* {{{ */ { while (ast->kind == ZEND_AST_DIM || ast->kind == ZEND_AST_PROP) { ast = ast->child[0]; } return zend_is_variable_or_call(ast); } /* }}} */ static inline zend_bool zend_is_const_default_class_ref(zend_ast *name_ast) /* {{{ */ { if (name_ast->kind != ZEND_AST_ZVAL) { return 0; } return ZEND_FETCH_CLASS_DEFAULT == zend_get_class_fetch_type_ast(name_ast); } /* }}} */ static inline void zend_handle_numeric_op(znode *node) /* {{{ */ { if (node->op_type == IS_CONST && Z_TYPE(node->u.constant) == IS_STRING) { zend_ulong index; if (ZEND_HANDLE_NUMERIC(Z_STR(node->u.constant), index)) { zval_ptr_dtor(&node->u.constant); ZVAL_LONG(&node->u.constant, index); } } } /* }}} */ static inline void zend_handle_numeric_dim(zend_op *opline, znode *dim_node) /* {{{ */ { if (Z_TYPE(dim_node->u.constant) == IS_STRING) { zend_ulong index; if (ZEND_HANDLE_NUMERIC(Z_STR(dim_node->u.constant), index)) { /* For numeric indexes we also keep the original value to use by ArrayAccess * See bug #63217 */ int c = zend_add_literal(&dim_node->u.constant); ZEND_ASSERT(opline->op2.constant + 1 == c); ZVAL_LONG(CT_CONSTANT(opline->op2), index); Z_EXTRA_P(CT_CONSTANT(opline->op2)) = ZEND_EXTRA_VALUE; return; } } } /* }}} */ static inline void zend_set_class_name_op1(zend_op *opline, znode *class_node) /* {{{ */ { if (class_node->op_type == IS_CONST) { opline->op1_type = IS_CONST; opline->op1.constant = zend_add_class_name_literal( Z_STR(class_node->u.constant)); } else { SET_NODE(opline->op1, class_node); } } /* }}} */ static void zend_compile_class_ref(znode *result, zend_ast *name_ast, uint32_t fetch_flags) /* {{{ */ { uint32_t fetch_type; if (name_ast->kind != ZEND_AST_ZVAL) { znode name_node; zend_compile_expr(&name_node, name_ast); if (name_node.op_type == IS_CONST) { zend_string *name; if (Z_TYPE(name_node.u.constant) != IS_STRING) { zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name"); } name = Z_STR(name_node.u.constant); fetch_type = zend_get_class_fetch_type(name); if (fetch_type == ZEND_FETCH_CLASS_DEFAULT) { result->op_type = IS_CONST; ZVAL_STR(&result->u.constant, zend_resolve_class_name(name, ZEND_NAME_FQ)); } else { zend_ensure_valid_class_fetch_type(fetch_type); result->op_type = IS_UNUSED; result->u.op.num = fetch_type | fetch_flags; } zend_string_release_ex(name, 0); } else { zend_op *opline = zend_emit_op(result, ZEND_FETCH_CLASS, NULL, &name_node); opline->op1.num = ZEND_FETCH_CLASS_DEFAULT | fetch_flags; } return; } /* Fully qualified names are always default refs */ if (name_ast->attr == ZEND_NAME_FQ) { result->op_type = IS_CONST; ZVAL_STR(&result->u.constant, zend_resolve_class_name_ast(name_ast)); return; } fetch_type = zend_get_class_fetch_type(zend_ast_get_str(name_ast)); if (ZEND_FETCH_CLASS_DEFAULT == fetch_type) { result->op_type = IS_CONST; ZVAL_STR(&result->u.constant, zend_resolve_class_name_ast(name_ast)); } else { zend_ensure_valid_class_fetch_type(fetch_type); result->op_type = IS_UNUSED; result->u.op.num = fetch_type | fetch_flags; } } /* }}} */ static int zend_try_compile_cv(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *name_ast = ast->child[0]; if (name_ast->kind == ZEND_AST_ZVAL) { zval *zv = zend_ast_get_zval(name_ast); zend_string *name; if (EXPECTED(Z_TYPE_P(zv) == IS_STRING)) { name = zval_make_interned_string(zv); } else { name = zend_new_interned_string(zval_get_string_func(zv)); } if (zend_is_auto_global(name)) { return FAILURE; } result->op_type = IS_CV; result->u.op.var = lookup_cv(name); if (UNEXPECTED(Z_TYPE_P(zv) != IS_STRING)) { zend_string_release_ex(name, 0); } return SUCCESS; } return FAILURE; } /* }}} */ static zend_op *zend_compile_simple_var_no_cv(znode *result, zend_ast *ast, uint32_t type, int delayed) /* {{{ */ { zend_ast *name_ast = ast->child[0]; znode name_node; zend_op *opline; zend_compile_expr(&name_node, name_ast); if (name_node.op_type == IS_CONST) { convert_to_string(&name_node.u.constant); } if (delayed) { opline = zend_delayed_emit_op(result, ZEND_FETCH_R, &name_node, NULL); } else { opline = zend_emit_op(result, ZEND_FETCH_R, &name_node, NULL); } if (name_node.op_type == IS_CONST && zend_is_auto_global(Z_STR(name_node.u.constant))) { opline->extended_value = ZEND_FETCH_GLOBAL; } else { opline->extended_value = ZEND_FETCH_LOCAL; } zend_adjust_for_fetch_type(opline, result, type); return opline; } /* }}} */ static zend_bool is_this_fetch(zend_ast *ast) /* {{{ */ { if (ast->kind == ZEND_AST_VAR && ast->child[0]->kind == ZEND_AST_ZVAL) { zval *name = zend_ast_get_zval(ast->child[0]); return Z_TYPE_P(name) == IS_STRING && zend_string_equals_literal(Z_STR_P(name), "this"); } return 0; } /* }}} */ static zend_op *zend_compile_simple_var(znode *result, zend_ast *ast, uint32_t type, int delayed) /* {{{ */ { if (is_this_fetch(ast)) { zend_op *opline = zend_emit_op(result, ZEND_FETCH_THIS, NULL, NULL); if ((type == BP_VAR_R) || (type == BP_VAR_IS)) { opline->result_type = IS_TMP_VAR; result->op_type = IS_TMP_VAR; } CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS; return opline; } else if (zend_try_compile_cv(result, ast) == FAILURE) { return zend_compile_simple_var_no_cv(result, ast, type, delayed); } return NULL; } /* }}} */ static void zend_separate_if_call_and_write(znode *node, zend_ast *ast, uint32_t type) /* {{{ */ { if (type != BP_VAR_R && type != BP_VAR_IS && zend_is_call(ast)) { if (node->op_type == IS_VAR) { zend_op *opline = zend_emit_op(NULL, ZEND_SEPARATE, node, NULL); opline->result_type = IS_VAR; opline->result.var = opline->op1.var; } else { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use result of built-in function in write context"); } } } /* }}} */ zend_op *zend_delayed_compile_var(znode *result, zend_ast *ast, uint32_t type, zend_bool by_ref); void zend_compile_assign(znode *result, zend_ast *ast); static inline void zend_emit_assign_znode(zend_ast *var_ast, znode *value_node) /* {{{ */ { znode dummy_node; zend_ast *assign_ast = zend_ast_create(ZEND_AST_ASSIGN, var_ast, zend_ast_create_znode(value_node)); zend_compile_assign(&dummy_node, assign_ast); zend_do_free(&dummy_node); } /* }}} */ static zend_op *zend_delayed_compile_dim(znode *result, zend_ast *ast, uint32_t type) /* {{{ */ { if (ast->attr == ZEND_DIM_ALTERNATIVE_SYNTAX) { zend_error(E_DEPRECATED, "Array and string offset access syntax with curly braces is deprecated"); } zend_ast *var_ast = ast->child[0]; zend_ast *dim_ast = ast->child[1]; zend_op *opline; znode var_node, dim_node; opline = zend_delayed_compile_var(&var_node, var_ast, type, 0); if (opline && type == BP_VAR_W && (opline->opcode == ZEND_FETCH_STATIC_PROP_W || opline->opcode == ZEND_FETCH_OBJ_W)) { opline->extended_value |= ZEND_FETCH_DIM_WRITE; } zend_separate_if_call_and_write(&var_node, var_ast, type); if (dim_ast == NULL) { if (type == BP_VAR_R || type == BP_VAR_IS) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading"); } if (type == BP_VAR_UNSET) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for unsetting"); } dim_node.op_type = IS_UNUSED; } else { zend_compile_expr(&dim_node, dim_ast); } opline = zend_delayed_emit_op(result, ZEND_FETCH_DIM_R, &var_node, &dim_node); zend_adjust_for_fetch_type(opline, result, type); if (dim_node.op_type == IS_CONST) { zend_handle_numeric_dim(opline, &dim_node); } return opline; } /* }}} */ static zend_op *zend_compile_dim(znode *result, zend_ast *ast, uint32_t type) /* {{{ */ { uint32_t offset = zend_delayed_compile_begin(); zend_delayed_compile_dim(result, ast, type); return zend_delayed_compile_end(offset); } /* }}} */ static zend_op *zend_delayed_compile_prop(znode *result, zend_ast *ast, uint32_t type) /* {{{ */ { zend_ast *obj_ast = ast->child[0]; zend_ast *prop_ast = ast->child[1]; znode obj_node, prop_node; zend_op *opline; if (is_this_fetch(obj_ast)) { obj_node.op_type = IS_UNUSED; CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS; } else { opline = zend_delayed_compile_var(&obj_node, obj_ast, type, 0); if (opline && type == BP_VAR_W && (opline->opcode == ZEND_FETCH_STATIC_PROP_W || opline->opcode == ZEND_FETCH_OBJ_W)) { opline->extended_value |= ZEND_FETCH_OBJ_WRITE; } zend_separate_if_call_and_write(&obj_node, obj_ast, type); } zend_compile_expr(&prop_node, prop_ast); opline = zend_delayed_emit_op(result, ZEND_FETCH_OBJ_R, &obj_node, &prop_node); if (opline->op2_type == IS_CONST) { convert_to_string(CT_CONSTANT(opline->op2)); opline->extended_value = zend_alloc_cache_slots(3); } zend_adjust_for_fetch_type(opline, result, type); return opline; } /* }}} */ static zend_op *zend_compile_prop(znode *result, zend_ast *ast, uint32_t type, int by_ref) /* {{{ */ { uint32_t offset = zend_delayed_compile_begin(); zend_op *opline = zend_delayed_compile_prop(result, ast, type); if (by_ref) { /* shared with cache_slot */ opline->extended_value |= ZEND_FETCH_REF; } return zend_delayed_compile_end(offset); } /* }}} */ zend_op *zend_compile_static_prop(znode *result, zend_ast *ast, uint32_t type, int by_ref, int delayed) /* {{{ */ { zend_ast *class_ast = ast->child[0]; zend_ast *prop_ast = ast->child[1]; znode class_node, prop_node; zend_op *opline; zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION); zend_compile_expr(&prop_node, prop_ast); if (delayed) { opline = zend_delayed_emit_op(result, ZEND_FETCH_STATIC_PROP_R, &prop_node, NULL); } else { opline = zend_emit_op(result, ZEND_FETCH_STATIC_PROP_R, &prop_node, NULL); } if (opline->op1_type == IS_CONST) { convert_to_string(CT_CONSTANT(opline->op1)); opline->extended_value = zend_alloc_cache_slots(3); } if (class_node.op_type == IS_CONST) { opline->op2_type = IS_CONST; opline->op2.constant = zend_add_class_name_literal( Z_STR(class_node.u.constant)); if (opline->op1_type != IS_CONST) { opline->extended_value = zend_alloc_cache_slot(); } } else { SET_NODE(opline->op2, &class_node); } if (by_ref && (type == BP_VAR_W || type == BP_VAR_FUNC_ARG)) { /* shared with cache_slot */ opline->extended_value |= ZEND_FETCH_REF; } zend_adjust_for_fetch_type(opline, result, type); return opline; } /* }}} */ static void zend_verify_list_assign_target(zend_ast *var_ast, zend_bool old_style) /* {{{ */ { if (var_ast->kind == ZEND_AST_ARRAY) { if (var_ast->attr == ZEND_ARRAY_SYNTAX_LONG) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot assign to array(), use [] instead"); } if (old_style != var_ast->attr) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix [] and list()"); } } else if (!zend_can_write_to_variable(var_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Assignments can only happen to writable values"); } } /* }}} */ static inline void zend_emit_assign_ref_znode(zend_ast *var_ast, znode *value_node); /* Propagate refs used on leaf elements to the surrounding list() structures. */ static zend_bool zend_propagate_list_refs(zend_ast *ast) { /* {{{ */ zend_ast_list *list = zend_ast_get_list(ast); zend_bool has_refs = 0; uint32_t i; for (i = 0; i < list->children; ++i) { zend_ast *elem_ast = list->child[i]; if (elem_ast) { zend_ast *var_ast = elem_ast->child[0]; if (var_ast->kind == ZEND_AST_ARRAY) { elem_ast->attr = zend_propagate_list_refs(var_ast); } has_refs |= elem_ast->attr; } } return has_refs; } /* }}} */ static void zend_compile_list_assign( znode *result, zend_ast *ast, znode *expr_node, zend_bool old_style) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; zend_bool has_elems = 0; zend_bool is_keyed = list->children > 0 && list->child[0] != NULL && list->child[0]->child[1] != NULL; if (list->children && expr_node->op_type == IS_CONST && Z_TYPE(expr_node->u.constant) == IS_STRING) { zval_make_interned_string(&expr_node->u.constant); } for (i = 0; i < list->children; ++i) { zend_ast *elem_ast = list->child[i]; zend_ast *var_ast, *key_ast; znode fetch_result, dim_node; zend_op *opline; if (elem_ast == NULL) { if (is_keyed) { zend_error(E_COMPILE_ERROR, "Cannot use empty array entries in keyed array assignment"); } else { continue; } } if (elem_ast->kind == ZEND_AST_UNPACK) { zend_error(E_COMPILE_ERROR, "Spread operator is not supported in assignments"); } var_ast = elem_ast->child[0]; key_ast = elem_ast->child[1]; has_elems = 1; if (is_keyed) { if (key_ast == NULL) { zend_error(E_COMPILE_ERROR, "Cannot mix keyed and unkeyed array entries in assignments"); } zend_compile_expr(&dim_node, key_ast); } else { if (key_ast != NULL) { zend_error(E_COMPILE_ERROR, "Cannot mix keyed and unkeyed array entries in assignments"); } dim_node.op_type = IS_CONST; ZVAL_LONG(&dim_node.u.constant, i); } if (expr_node->op_type == IS_CONST) { Z_TRY_ADDREF(expr_node->u.constant); } zend_verify_list_assign_target(var_ast, old_style); opline = zend_emit_op(&fetch_result, elem_ast->attr ? (expr_node->op_type == IS_CV ? ZEND_FETCH_DIM_W : ZEND_FETCH_LIST_W) : ZEND_FETCH_LIST_R, expr_node, &dim_node); if (dim_node.op_type == IS_CONST) { zend_handle_numeric_dim(opline, &dim_node); } if (var_ast->kind == ZEND_AST_ARRAY) { if (elem_ast->attr) { zend_emit_op(&fetch_result, ZEND_MAKE_REF, &fetch_result, NULL); } zend_compile_list_assign(NULL, var_ast, &fetch_result, var_ast->attr); } else if (elem_ast->attr) { zend_emit_assign_ref_znode(var_ast, &fetch_result); } else { zend_emit_assign_znode(var_ast, &fetch_result); } } if (has_elems == 0) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use empty list"); } if (result) { *result = *expr_node; } else { zend_do_free(expr_node); } } /* }}} */ static void zend_ensure_writable_variable(const zend_ast *ast) /* {{{ */ { if (ast->kind == ZEND_AST_CALL) { zend_error_noreturn(E_COMPILE_ERROR, "Can't use function return value in write context"); } if (ast->kind == ZEND_AST_METHOD_CALL || ast->kind == ZEND_AST_STATIC_CALL) { zend_error_noreturn(E_COMPILE_ERROR, "Can't use method return value in write context"); } } /* }}} */ /* Detects $a... = $a pattern */ zend_bool zend_is_assign_to_self(zend_ast *var_ast, zend_ast *expr_ast) /* {{{ */ { if (expr_ast->kind != ZEND_AST_VAR || expr_ast->child[0]->kind != ZEND_AST_ZVAL) { return 0; } while (zend_is_variable(var_ast) && var_ast->kind != ZEND_AST_VAR) { var_ast = var_ast->child[0]; } if (var_ast->kind != ZEND_AST_VAR || var_ast->child[0]->kind != ZEND_AST_ZVAL) { return 0; } { zend_string *name1 = zval_get_string(zend_ast_get_zval(var_ast->child[0])); zend_string *name2 = zval_get_string(zend_ast_get_zval(expr_ast->child[0])); zend_bool result = zend_string_equals(name1, name2); zend_string_release_ex(name1, 0); zend_string_release_ex(name2, 0); return result; } } /* }}} */ void zend_compile_assign(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; zend_ast *expr_ast = ast->child[1]; znode var_node, expr_node; zend_op *opline; uint32_t offset; if (is_this_fetch(var_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this"); } zend_ensure_writable_variable(var_ast); switch (var_ast->kind) { case ZEND_AST_VAR: offset = zend_delayed_compile_begin(); zend_delayed_compile_var(&var_node, var_ast, BP_VAR_W, 0); zend_compile_expr(&expr_node, expr_ast); zend_delayed_compile_end(offset); zend_emit_op(result, ZEND_ASSIGN, &var_node, &expr_node); return; case ZEND_AST_STATIC_PROP: offset = zend_delayed_compile_begin(); zend_delayed_compile_var(result, var_ast, BP_VAR_W, 0); zend_compile_expr(&expr_node, expr_ast); opline = zend_delayed_compile_end(offset); opline->opcode = ZEND_ASSIGN_STATIC_PROP; zend_emit_op_data(&expr_node); return; case ZEND_AST_DIM: offset = zend_delayed_compile_begin(); zend_delayed_compile_dim(result, var_ast, BP_VAR_W); if (zend_is_assign_to_self(var_ast, expr_ast) && !is_this_fetch(expr_ast)) { /* $a[0] = $a should evaluate the right $a first */ znode cv_node; if (zend_try_compile_cv(&cv_node, expr_ast) == FAILURE) { zend_compile_simple_var_no_cv(&expr_node, expr_ast, BP_VAR_R, 0); } else { zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &cv_node, NULL); } } else { zend_compile_expr(&expr_node, expr_ast); } opline = zend_delayed_compile_end(offset); opline->opcode = ZEND_ASSIGN_DIM; opline = zend_emit_op_data(&expr_node); return; case ZEND_AST_PROP: offset = zend_delayed_compile_begin(); zend_delayed_compile_prop(result, var_ast, BP_VAR_W); zend_compile_expr(&expr_node, expr_ast); opline = zend_delayed_compile_end(offset); opline->opcode = ZEND_ASSIGN_OBJ; zend_emit_op_data(&expr_node); return; case ZEND_AST_ARRAY: if (zend_propagate_list_refs(var_ast)) { if (!zend_is_variable_or_call(expr_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot assign reference to non referencable value"); } zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1); /* MAKE_REF is usually not necessary for CVs. However, if there are * self-assignments, this forces the RHS to evaluate first. */ zend_emit_op(&expr_node, ZEND_MAKE_REF, &expr_node, NULL); } else { if (expr_ast->kind == ZEND_AST_VAR) { /* list($a, $b) = $a should evaluate the right $a first */ znode cv_node; if (zend_try_compile_cv(&cv_node, expr_ast) == FAILURE) { zend_compile_simple_var_no_cv(&expr_node, expr_ast, BP_VAR_R, 0); } else { zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &cv_node, NULL); } } else { zend_compile_expr(&expr_node, expr_ast); } } zend_compile_list_assign(result, var_ast, &expr_node, var_ast->attr); return; EMPTY_SWITCH_DEFAULT_CASE(); } } /* }}} */ void zend_compile_assign_ref(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *target_ast = ast->child[0]; zend_ast *source_ast = ast->child[1]; znode target_node, source_node; zend_op *opline; uint32_t offset, flags; if (is_this_fetch(target_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this"); } zend_ensure_writable_variable(target_ast); offset = zend_delayed_compile_begin(); zend_delayed_compile_var(&target_node, target_ast, BP_VAR_W, 1); zend_compile_var(&source_node, source_ast, BP_VAR_W, 1); if ((target_ast->kind != ZEND_AST_VAR || target_ast->child[0]->kind != ZEND_AST_ZVAL) && source_node.op_type != IS_CV) { /* Both LHS and RHS expressions may modify the same data structure, * and the modification during RHS evaluation may dangle the pointer * to the result of the LHS evaluation. * Use MAKE_REF instruction to replace direct pointer with REFERENCE. * See: Bug #71539 */ zend_emit_op(&source_node, ZEND_MAKE_REF, &source_node, NULL); } opline = zend_delayed_compile_end(offset); if (source_node.op_type != IS_VAR && zend_is_call(source_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use result of built-in function in write context"); } flags = zend_is_call(source_ast) ? ZEND_RETURNS_FUNCTION : 0; if (opline && opline->opcode == ZEND_FETCH_OBJ_W) { opline->opcode = ZEND_ASSIGN_OBJ_REF; opline->extended_value &= ~ZEND_FETCH_REF; opline->extended_value |= flags; zend_emit_op_data(&source_node); if (result != NULL) { *result = target_node; } } else if (opline && opline->opcode == ZEND_FETCH_STATIC_PROP_W) { opline->opcode = ZEND_ASSIGN_STATIC_PROP_REF; opline->extended_value &= ~ZEND_FETCH_REF; opline->extended_value |= flags; zend_emit_op_data(&source_node); if (result != NULL) { *result = target_node; } } else { opline = zend_emit_op(result, ZEND_ASSIGN_REF, &target_node, &source_node); opline->extended_value = flags; } } /* }}} */ static inline void zend_emit_assign_ref_znode(zend_ast *var_ast, znode *value_node) /* {{{ */ { zend_ast *assign_ast = zend_ast_create(ZEND_AST_ASSIGN_REF, var_ast, zend_ast_create_znode(value_node)); zend_compile_assign_ref(NULL, assign_ast); } /* }}} */ void zend_compile_compound_assign(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; zend_ast *expr_ast = ast->child[1]; uint32_t opcode = ast->attr; znode var_node, expr_node; zend_op *opline; uint32_t offset, cache_slot; zend_ensure_writable_variable(var_ast); switch (var_ast->kind) { case ZEND_AST_VAR: offset = zend_delayed_compile_begin(); zend_delayed_compile_var(&var_node, var_ast, BP_VAR_RW, 0); zend_compile_expr(&expr_node, expr_ast); zend_delayed_compile_end(offset); opline = zend_emit_op(result, ZEND_ASSIGN_OP, &var_node, &expr_node); opline->extended_value = opcode; return; case ZEND_AST_STATIC_PROP: offset = zend_delayed_compile_begin(); zend_delayed_compile_var(result, var_ast, BP_VAR_RW, 0); zend_compile_expr(&expr_node, expr_ast); opline = zend_delayed_compile_end(offset); cache_slot = opline->extended_value; opline->opcode = ZEND_ASSIGN_STATIC_PROP_OP; opline->extended_value = opcode; opline = zend_emit_op_data(&expr_node); opline->extended_value = cache_slot; return; case ZEND_AST_DIM: offset = zend_delayed_compile_begin(); zend_delayed_compile_dim(result, var_ast, BP_VAR_RW); zend_compile_expr(&expr_node, expr_ast); opline = zend_delayed_compile_end(offset); opline->opcode = ZEND_ASSIGN_DIM_OP; opline->extended_value = opcode; zend_emit_op_data(&expr_node); return; case ZEND_AST_PROP: offset = zend_delayed_compile_begin(); zend_delayed_compile_prop(result, var_ast, BP_VAR_RW); zend_compile_expr(&expr_node, expr_ast); opline = zend_delayed_compile_end(offset); cache_slot = opline->extended_value; opline->opcode = ZEND_ASSIGN_OBJ_OP; opline->extended_value = opcode; opline = zend_emit_op_data(&expr_node); opline->extended_value = cache_slot; return; EMPTY_SWITCH_DEFAULT_CASE() } } /* }}} */ uint32_t zend_compile_args(zend_ast *ast, zend_function *fbc) /* {{{ */ { zend_ast_list *args = zend_ast_get_list(ast); uint32_t i; zend_bool uses_arg_unpack = 0; uint32_t arg_count = 0; /* number of arguments not including unpacks */ for (i = 0; i < args->children; ++i) { zend_ast *arg = args->child[i]; uint32_t arg_num = i + 1; znode arg_node; zend_op *opline; zend_uchar opcode; if (arg->kind == ZEND_AST_UNPACK) { uses_arg_unpack = 1; fbc = NULL; zend_compile_expr(&arg_node, arg->child[0]); opline = zend_emit_op(NULL, ZEND_SEND_UNPACK, &arg_node, NULL); opline->op2.num = arg_count; opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, arg_count); continue; } if (uses_arg_unpack) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use positional argument after argument unpacking"); } arg_count++; if (zend_is_variable_or_call(arg)) { if (zend_is_call(arg)) { zend_compile_var(&arg_node, arg, BP_VAR_R, 0); if (arg_node.op_type & (IS_CONST|IS_TMP_VAR)) { /* Function call was converted into builtin instruction */ opcode = ZEND_SEND_VAL; } else { if (fbc) { if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) { opcode = ZEND_SEND_VAR_NO_REF; } else if (ARG_MAY_BE_SENT_BY_REF(fbc, arg_num)) { opcode = ZEND_SEND_VAL; } else { opcode = ZEND_SEND_VAR; } } else { opcode = ZEND_SEND_VAR_NO_REF_EX; } } } else if (fbc) { if (ARG_SHOULD_BE_SENT_BY_REF(fbc, arg_num)) { zend_compile_var(&arg_node, arg, BP_VAR_W, 1); opcode = ZEND_SEND_REF; } else { zend_compile_var(&arg_node, arg, BP_VAR_R, 0); opcode = (arg_node.op_type == IS_TMP_VAR) ? ZEND_SEND_VAL : ZEND_SEND_VAR; } } else { do { if (arg->kind == ZEND_AST_VAR) { CG(zend_lineno) = zend_ast_get_lineno(ast); if (is_this_fetch(arg)) { zend_emit_op(&arg_node, ZEND_FETCH_THIS, NULL, NULL); opcode = ZEND_SEND_VAR_EX; CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS; break; } else if (zend_try_compile_cv(&arg_node, arg) == SUCCESS) { opcode = ZEND_SEND_VAR_EX; break; } } opline = zend_emit_op(NULL, ZEND_CHECK_FUNC_ARG, NULL, NULL); opline->op2.num = arg_num; zend_compile_var(&arg_node, arg, BP_VAR_FUNC_ARG, 1); opcode = ZEND_SEND_FUNC_ARG; } while (0); } } else { zend_compile_expr(&arg_node, arg); if (arg_node.op_type == IS_VAR) { /* pass ++$a or something similar */ if (fbc) { if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) { opcode = ZEND_SEND_VAR_NO_REF; } else if (ARG_MAY_BE_SENT_BY_REF(fbc, arg_num)) { opcode = ZEND_SEND_VAL; } else { opcode = ZEND_SEND_VAR; } } else { opcode = ZEND_SEND_VAR_NO_REF_EX; } } else if (arg_node.op_type == IS_CV) { if (fbc) { if (ARG_SHOULD_BE_SENT_BY_REF(fbc, arg_num)) { opcode = ZEND_SEND_REF; } else { opcode = ZEND_SEND_VAR; } } else { opcode = ZEND_SEND_VAR_EX; } } else { if (fbc) { opcode = ZEND_SEND_VAL; if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) { zend_error_noreturn(E_COMPILE_ERROR, "Only variables can be passed by reference"); } } else { opcode = ZEND_SEND_VAL_EX; } } } opline = zend_emit_op(NULL, opcode, &arg_node, NULL); opline->op2.opline_num = arg_num; opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, arg_num); } return arg_count; } /* }}} */ ZEND_API zend_uchar zend_get_call_op(const zend_op *init_op, zend_function *fbc) /* {{{ */ { if (fbc) { if (fbc->type == ZEND_INTERNAL_FUNCTION && !(CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS)) { if (init_op->opcode == ZEND_INIT_FCALL && !zend_execute_internal) { if (!(fbc->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_DEPRECATED|ZEND_ACC_HAS_TYPE_HINTS|ZEND_ACC_RETURN_REFERENCE))) { return ZEND_DO_ICALL; } else { return ZEND_DO_FCALL_BY_NAME; } } } else if (!(CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS)){ if (zend_execute_ex == execute_ex && !(fbc->common.fn_flags & ZEND_ACC_ABSTRACT)) { return ZEND_DO_UCALL; } } } else if (zend_execute_ex == execute_ex && !zend_execute_internal && (init_op->opcode == ZEND_INIT_FCALL_BY_NAME || init_op->opcode == ZEND_INIT_NS_FCALL_BY_NAME)) { return ZEND_DO_FCALL_BY_NAME; } return ZEND_DO_FCALL; } /* }}} */ void zend_compile_call_common(znode *result, zend_ast *args_ast, zend_function *fbc) /* {{{ */ { zend_op *opline; uint32_t opnum_init = get_next_op_number() - 1; uint32_t arg_count; arg_count = zend_compile_args(args_ast, fbc); zend_do_extended_fcall_begin(); opline = &CG(active_op_array)->opcodes[opnum_init]; opline->extended_value = arg_count; if (opline->opcode == ZEND_INIT_FCALL) { opline->op1.num = zend_vm_calc_used_stack(arg_count, fbc); } opline = zend_emit_op(result, zend_get_call_op(opline, fbc), NULL, NULL); zend_do_extended_fcall_end(); } /* }}} */ zend_bool zend_compile_function_name(znode *name_node, zend_ast *name_ast) /* {{{ */ { zend_string *orig_name = zend_ast_get_str(name_ast); zend_bool is_fully_qualified; name_node->op_type = IS_CONST; ZVAL_STR(&name_node->u.constant, zend_resolve_function_name( orig_name, name_ast->attr, &is_fully_qualified)); return !is_fully_qualified && FC(current_namespace); } /* }}} */ void zend_compile_ns_call(znode *result, znode *name_node, zend_ast *args_ast) /* {{{ */ { zend_op *opline = get_next_op(); opline->opcode = ZEND_INIT_NS_FCALL_BY_NAME; opline->op2_type = IS_CONST; opline->op2.constant = zend_add_ns_func_name_literal( Z_STR(name_node->u.constant)); opline->result.num = zend_alloc_cache_slot(); zend_compile_call_common(result, args_ast, NULL); } /* }}} */ void zend_compile_dynamic_call(znode *result, znode *name_node, zend_ast *args_ast) /* {{{ */ { if (name_node->op_type == IS_CONST && Z_TYPE(name_node->u.constant) == IS_STRING) { const char *colon; zend_string *str = Z_STR(name_node->u.constant); if ((colon = zend_memrchr(ZSTR_VAL(str), ':', ZSTR_LEN(str))) != NULL && colon > ZSTR_VAL(str) && *(colon - 1) == ':') { zend_string *class = zend_string_init(ZSTR_VAL(str), colon - ZSTR_VAL(str) - 1, 0); zend_string *method = zend_string_init(colon + 1, ZSTR_LEN(str) - (colon - ZSTR_VAL(str)) - 1, 0); zend_op *opline = get_next_op(); opline->opcode = ZEND_INIT_STATIC_METHOD_CALL; opline->op1_type = IS_CONST; opline->op1.constant = zend_add_class_name_literal(class); opline->op2_type = IS_CONST; opline->op2.constant = zend_add_func_name_literal(method); /* 2 slots, for class and method */ opline->result.num = zend_alloc_cache_slots(2); zval_ptr_dtor(&name_node->u.constant); } else { zend_op *opline = get_next_op(); opline->opcode = ZEND_INIT_FCALL_BY_NAME; opline->op2_type = IS_CONST; opline->op2.constant = zend_add_func_name_literal(str); opline->result.num = zend_alloc_cache_slot(); } } else { zend_emit_op(NULL, ZEND_INIT_DYNAMIC_CALL, NULL, name_node); } zend_compile_call_common(result, args_ast, NULL); } /* }}} */ static inline zend_bool zend_args_contain_unpack(zend_ast_list *args) /* {{{ */ { uint32_t i; for (i = 0; i < args->children; ++i) { if (args->child[i]->kind == ZEND_AST_UNPACK) { return 1; } } return 0; } /* }}} */ int zend_compile_func_strlen(znode *result, zend_ast_list *args) /* {{{ */ { znode arg_node; if ((CG(compiler_options) & ZEND_COMPILE_NO_BUILTIN_STRLEN) || args->children != 1 ) { return FAILURE; } zend_compile_expr(&arg_node, args->child[0]); if (arg_node.op_type == IS_CONST && Z_TYPE(arg_node.u.constant) == IS_STRING) { result->op_type = IS_CONST; ZVAL_LONG(&result->u.constant, Z_STRLEN(arg_node.u.constant)); zval_ptr_dtor_str(&arg_node.u.constant); } else { zend_emit_op_tmp(result, ZEND_STRLEN, &arg_node, NULL); } return SUCCESS; } /* }}} */ int zend_compile_func_typecheck(znode *result, zend_ast_list *args, uint32_t type) /* {{{ */ { znode arg_node; zend_op *opline; if (args->children != 1) { return FAILURE; } zend_compile_expr(&arg_node, args->child[0]); opline = zend_emit_op_tmp(result, ZEND_TYPE_CHECK, &arg_node, NULL); if (type != _IS_BOOL) { opline->extended_value = (1 << type); } else { opline->extended_value = (1 << IS_FALSE) | (1 << IS_TRUE); } return SUCCESS; } /* }}} */ int zend_compile_func_cast(znode *result, zend_ast_list *args, uint32_t type) /* {{{ */ { znode arg_node; zend_op *opline; if (args->children != 1) { return FAILURE; } zend_compile_expr(&arg_node, args->child[0]); opline = zend_emit_op_tmp(result, ZEND_CAST, &arg_node, NULL); opline->extended_value = type; return SUCCESS; } /* }}} */ int zend_compile_func_defined(znode *result, zend_ast_list *args) /* {{{ */ { zend_string *name; zend_op *opline; if (args->children != 1 || args->child[0]->kind != ZEND_AST_ZVAL) { return FAILURE; } name = zval_get_string(zend_ast_get_zval(args->child[0])); if (zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)) || zend_memrchr(ZSTR_VAL(name), ':', ZSTR_LEN(name))) { zend_string_release_ex(name, 0); return FAILURE; } if (zend_try_ct_eval_const(&result->u.constant, name, 0)) { zend_string_release_ex(name, 0); zval_ptr_dtor(&result->u.constant); ZVAL_TRUE(&result->u.constant); result->op_type = IS_CONST; return SUCCESS; } opline = zend_emit_op_tmp(result, ZEND_DEFINED, NULL, NULL); opline->op1_type = IS_CONST; LITERAL_STR(opline->op1, name); opline->extended_value = zend_alloc_cache_slot(); /* Lowercase constant name in a separate literal */ { zval c; zend_string *lcname = zend_string_tolower(name); ZVAL_NEW_STR(&c, lcname); zend_add_literal(&c); } return SUCCESS; } /* }}} */ int zend_compile_func_chr(znode *result, zend_ast_list *args) /* {{{ */ { if (args->children == 1 && args->child[0]->kind == ZEND_AST_ZVAL && Z_TYPE_P(zend_ast_get_zval(args->child[0])) == IS_LONG) { zend_long c = Z_LVAL_P(zend_ast_get_zval(args->child[0])) & 0xff; result->op_type = IS_CONST; ZVAL_INTERNED_STR(&result->u.constant, ZSTR_CHAR(c)); return SUCCESS; } else { return FAILURE; } } /* }}} */ int zend_compile_func_ord(znode *result, zend_ast_list *args) /* {{{ */ { if (args->children == 1 && args->child[0]->kind == ZEND_AST_ZVAL && Z_TYPE_P(zend_ast_get_zval(args->child[0])) == IS_STRING) { result->op_type = IS_CONST; ZVAL_LONG(&result->u.constant, (unsigned char)Z_STRVAL_P(zend_ast_get_zval(args->child[0]))[0]); return SUCCESS; } else { return FAILURE; } } /* }}} */ /* We can only calculate the stack size for functions that have been fully compiled, otherwise * additional CV or TMP slots may still be added. This prevents the use of INIT_FCALL for * directly or indirectly recursive function calls. */ static zend_bool fbc_is_finalized(zend_function *fbc) { return !ZEND_USER_CODE(fbc->type) || (fbc->common.fn_flags & ZEND_ACC_DONE_PASS_TWO); } static int zend_try_compile_ct_bound_init_user_func(zend_ast *name_ast, uint32_t num_args) /* {{{ */ { zend_string *name, *lcname; zend_function *fbc; zend_op *opline; if (name_ast->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(name_ast)) != IS_STRING) { return FAILURE; } name = zend_ast_get_str(name_ast); lcname = zend_string_tolower(name); fbc = zend_hash_find_ptr(CG(function_table), lcname); if (!fbc || !fbc_is_finalized(fbc) || (fbc->type == ZEND_INTERNAL_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS)) || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS)) || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) && fbc->op_array.filename != CG(active_op_array)->filename) ) { zend_string_release_ex(lcname, 0); return FAILURE; } opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, NULL); opline->extended_value = num_args; opline->op1.num = zend_vm_calc_used_stack(num_args, fbc); opline->op2_type = IS_CONST; LITERAL_STR(opline->op2, lcname); opline->result.num = zend_alloc_cache_slot(); return SUCCESS; } /* }}} */ static void zend_compile_init_user_func(zend_ast *name_ast, uint32_t num_args, zend_string *orig_func_name) /* {{{ */ { zend_op *opline; znode name_node; if (zend_try_compile_ct_bound_init_user_func(name_ast, num_args) == SUCCESS) { return; } zend_compile_expr(&name_node, name_ast); opline = zend_emit_op(NULL, ZEND_INIT_USER_CALL, NULL, &name_node); opline->op1_type = IS_CONST; LITERAL_STR(opline->op1, zend_string_copy(orig_func_name)); opline->extended_value = num_args; } /* }}} */ /* cufa = call_user_func_array */ int zend_compile_func_cufa(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */ { znode arg_node; if (args->children != 2) { return FAILURE; } zend_compile_init_user_func(args->child[0], 0, lcname); if (args->child[1]->kind == ZEND_AST_CALL && args->child[1]->child[0]->kind == ZEND_AST_ZVAL && Z_TYPE_P(zend_ast_get_zval(args->child[1]->child[0])) == IS_STRING && args->child[1]->child[1]->kind == ZEND_AST_ARG_LIST) { zend_string *orig_name = zend_ast_get_str(args->child[1]->child[0]); zend_ast_list *list = zend_ast_get_list(args->child[1]->child[1]); zend_bool is_fully_qualified; zend_string *name = zend_resolve_function_name(orig_name, args->child[1]->child[0]->attr, &is_fully_qualified); if (zend_string_equals_literal_ci(name, "array_slice") && list->children == 3 && list->child[1]->kind == ZEND_AST_ZVAL) { zval *zv = zend_ast_get_zval(list->child[1]); if (Z_TYPE_P(zv) == IS_LONG && Z_LVAL_P(zv) >= 0 && Z_LVAL_P(zv) <= 0x7fffffff) { zend_op *opline; znode len_node; zend_compile_expr(&arg_node, list->child[0]); zend_compile_expr(&len_node, list->child[2]); opline = zend_emit_op(NULL, ZEND_SEND_ARRAY, &arg_node, &len_node); opline->extended_value = Z_LVAL_P(zv); zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL); zend_string_release_ex(name, 0); return SUCCESS; } } zend_string_release_ex(name, 0); } zend_compile_expr(&arg_node, args->child[1]); zend_emit_op(NULL, ZEND_SEND_ARRAY, &arg_node, NULL); zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL); return SUCCESS; } /* }}} */ /* cuf = call_user_func */ int zend_compile_func_cuf(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */ { uint32_t i; if (args->children < 1) { return FAILURE; } zend_compile_init_user_func(args->child[0], args->children - 1, lcname); for (i = 1; i < args->children; ++i) { zend_ast *arg_ast = args->child[i]; znode arg_node; zend_op *opline; zend_compile_expr(&arg_node, arg_ast); opline = zend_emit_op(NULL, ZEND_SEND_USER, &arg_node, NULL); opline->op2.num = i; opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, i); } zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL); return SUCCESS; } /* }}} */ static void zend_compile_assert(znode *result, zend_ast_list *args, zend_string *name, zend_function *fbc) /* {{{ */ { if (EG(assertions) >= 0) { znode name_node; zend_op *opline; uint32_t check_op_number = get_next_op_number(); zend_emit_op(NULL, ZEND_ASSERT_CHECK, NULL, NULL); if (fbc && fbc_is_finalized(fbc)) { name_node.op_type = IS_CONST; ZVAL_STR_COPY(&name_node.u.constant, name); opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, &name_node); } else { opline = zend_emit_op(NULL, ZEND_INIT_NS_FCALL_BY_NAME, NULL, NULL); opline->op2_type = IS_CONST; opline->op2.constant = zend_add_ns_func_name_literal(name); } opline->result.num = zend_alloc_cache_slot(); if (args->children == 1 && (args->child[0]->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(args->child[0])) != IS_STRING)) { /* add "assert(condition) as assertion message */ zend_ast_list_add((zend_ast*)args, zend_ast_create_zval_from_str( zend_ast_export("assert(", args->child[0], ")"))); } zend_compile_call_common(result, (zend_ast*)args, fbc); opline = &CG(active_op_array)->opcodes[check_op_number]; opline->op2.opline_num = get_next_op_number(); SET_NODE(opline->result, result); } else { if (!fbc) { zend_string_release_ex(name, 0); } result->op_type = IS_CONST; ZVAL_TRUE(&result->u.constant); } } /* }}} */ static int zend_compile_func_in_array(znode *result, zend_ast_list *args) /* {{{ */ { zend_bool strict = 0; znode array, needly; zend_op *opline; if (args->children == 3) { if (args->child[2]->kind == ZEND_AST_ZVAL) { strict = zend_is_true(zend_ast_get_zval(args->child[2])); } else if (args->child[2]->kind == ZEND_AST_CONST) { zval value; zend_ast *name_ast = args->child[2]->child[0]; zend_bool is_fully_qualified; zend_string *resolved_name = zend_resolve_const_name( zend_ast_get_str(name_ast), name_ast->attr, &is_fully_qualified); if (!zend_try_ct_eval_const(&value, resolved_name, is_fully_qualified)) { zend_string_release_ex(resolved_name, 0); return FAILURE; } zend_string_release_ex(resolved_name, 0); strict = zend_is_true(&value); zval_ptr_dtor(&value); } else { return FAILURE; } } else if (args->children != 2) { return FAILURE; } if (args->child[1]->kind != ZEND_AST_ARRAY || !zend_try_ct_eval_array(&array.u.constant, args->child[1])) { return FAILURE; } if (zend_hash_num_elements(Z_ARRVAL(array.u.constant)) > 0) { zend_bool ok = 1; zval *val, tmp; HashTable *src = Z_ARRVAL(array.u.constant); HashTable *dst = zend_new_array(zend_hash_num_elements(src)); ZVAL_TRUE(&tmp); if (strict) { ZEND_HASH_FOREACH_VAL(src, val) { if (Z_TYPE_P(val) == IS_STRING) { zend_hash_add(dst, Z_STR_P(val), &tmp); } else if (Z_TYPE_P(val) == IS_LONG) { zend_hash_index_add(dst, Z_LVAL_P(val), &tmp); } else { zend_array_destroy(dst); ok = 0; break; } } ZEND_HASH_FOREACH_END(); } else { ZEND_HASH_FOREACH_VAL(src, val) { if (Z_TYPE_P(val) != IS_STRING || is_numeric_string(Z_STRVAL_P(val), Z_STRLEN_P(val), NULL, NULL, 0)) { zend_array_destroy(dst); ok = 0; break; } zend_hash_add(dst, Z_STR_P(val), &tmp); } ZEND_HASH_FOREACH_END(); } zend_array_destroy(src); if (!ok) { return FAILURE; } Z_ARRVAL(array.u.constant) = dst; } array.op_type = IS_CONST; zend_compile_expr(&needly, args->child[0]); opline = zend_emit_op_tmp(result, ZEND_IN_ARRAY, &needly, &array); opline->extended_value = strict; return SUCCESS; } /* }}} */ int zend_compile_func_count(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */ { znode arg_node; zend_op *opline; if (args->children != 1) { return FAILURE; } zend_compile_expr(&arg_node, args->child[0]); opline = zend_emit_op_tmp(result, ZEND_COUNT, &arg_node, NULL); opline->extended_value = zend_string_equals_literal(lcname, "sizeof"); return SUCCESS; } /* }}} */ int zend_compile_func_get_class(znode *result, zend_ast_list *args) /* {{{ */ { if (args->children == 0) { zend_emit_op_tmp(result, ZEND_GET_CLASS, NULL, NULL); } else { znode arg_node; if (args->children != 1) { return FAILURE; } zend_compile_expr(&arg_node, args->child[0]); zend_emit_op_tmp(result, ZEND_GET_CLASS, &arg_node, NULL); } return SUCCESS; } /* }}} */ int zend_compile_func_get_called_class(znode *result, zend_ast_list *args) /* {{{ */ { if (args->children != 0) { return FAILURE; } zend_emit_op_tmp(result, ZEND_GET_CALLED_CLASS, NULL, NULL); return SUCCESS; } /* }}} */ int zend_compile_func_gettype(znode *result, zend_ast_list *args) /* {{{ */ { znode arg_node; if (args->children != 1) { return FAILURE; } zend_compile_expr(&arg_node, args->child[0]); zend_emit_op_tmp(result, ZEND_GET_TYPE, &arg_node, NULL); return SUCCESS; } /* }}} */ int zend_compile_func_num_args(znode *result, zend_ast_list *args) /* {{{ */ { if (CG(active_op_array)->function_name && args->children == 0) { zend_emit_op_tmp(result, ZEND_FUNC_NUM_ARGS, NULL, NULL); return SUCCESS; } else { return FAILURE; } } /* }}} */ int zend_compile_func_get_args(znode *result, zend_ast_list *args) /* {{{ */ { if (CG(active_op_array)->function_name && args->children == 0) { zend_emit_op_tmp(result, ZEND_FUNC_GET_ARGS, NULL, NULL); return SUCCESS; } else { return FAILURE; } } /* }}} */ int zend_compile_func_array_key_exists(znode *result, zend_ast_list *args) /* {{{ */ { znode subject, needle; if (args->children != 2) { return FAILURE; } zend_compile_expr(&needle, args->child[0]); zend_compile_expr(&subject, args->child[1]); zend_emit_op_tmp(result, ZEND_ARRAY_KEY_EXISTS, &needle, &subject); return SUCCESS; } /* }}} */ int zend_compile_func_array_slice(znode *result, zend_ast_list *args) /* {{{ */ { if (CG(active_op_array)->function_name && args->children == 2 && args->child[0]->kind == ZEND_AST_CALL && args->child[0]->child[0]->kind == ZEND_AST_ZVAL && Z_TYPE_P(zend_ast_get_zval(args->child[0]->child[0])) == IS_STRING && args->child[0]->child[1]->kind == ZEND_AST_ARG_LIST && args->child[1]->kind == ZEND_AST_ZVAL) { zend_string *orig_name = zend_ast_get_str(args->child[0]->child[0]); zend_bool is_fully_qualified; zend_string *name = zend_resolve_function_name(orig_name, args->child[0]->child[0]->attr, &is_fully_qualified); zend_ast_list *list = zend_ast_get_list(args->child[0]->child[1]); zval *zv = zend_ast_get_zval(args->child[1]); znode first; if (zend_string_equals_literal_ci(name, "func_get_args") && list->children == 0 && Z_TYPE_P(zv) == IS_LONG && Z_LVAL_P(zv) >= 0) { first.op_type = IS_CONST; ZVAL_LONG(&first.u.constant, Z_LVAL_P(zv)); zend_emit_op_tmp(result, ZEND_FUNC_GET_ARGS, &first, NULL); zend_string_release_ex(name, 0); return SUCCESS; } zend_string_release_ex(name, 0); } return FAILURE; } /* }}} */ int zend_try_compile_special_func(znode *result, zend_string *lcname, zend_ast_list *args, zend_function *fbc, uint32_t type) /* {{{ */ { if (fbc->internal_function.handler == ZEND_FN(display_disabled_function)) { return FAILURE; } if (CG(compiler_options) & ZEND_COMPILE_NO_BUILTINS) { return FAILURE; } if (zend_args_contain_unpack(args)) { return FAILURE; } if (zend_string_equals_literal(lcname, "strlen")) { return zend_compile_func_strlen(result, args); } else if (zend_string_equals_literal(lcname, "is_null")) { return zend_compile_func_typecheck(result, args, IS_NULL); } else if (zend_string_equals_literal(lcname, "is_bool")) { return zend_compile_func_typecheck(result, args, _IS_BOOL); } else if (zend_string_equals_literal(lcname, "is_long") || zend_string_equals_literal(lcname, "is_int") || zend_string_equals_literal(lcname, "is_integer") ) { return zend_compile_func_typecheck(result, args, IS_LONG); } else if (zend_string_equals_literal(lcname, "is_float") || zend_string_equals_literal(lcname, "is_double") ) { return zend_compile_func_typecheck(result, args, IS_DOUBLE); } else if (zend_string_equals_literal(lcname, "is_string")) { return zend_compile_func_typecheck(result, args, IS_STRING); } else if (zend_string_equals_literal(lcname, "is_array")) { return zend_compile_func_typecheck(result, args, IS_ARRAY); } else if (zend_string_equals_literal(lcname, "is_object")) { return zend_compile_func_typecheck(result, args, IS_OBJECT); } else if (zend_string_equals_literal(lcname, "is_resource")) { return zend_compile_func_typecheck(result, args, IS_RESOURCE); } else if (zend_string_equals_literal(lcname, "boolval")) { return zend_compile_func_cast(result, args, _IS_BOOL); } else if (zend_string_equals_literal(lcname, "intval")) { return zend_compile_func_cast(result, args, IS_LONG); } else if (zend_string_equals_literal(lcname, "floatval") || zend_string_equals_literal(lcname, "doubleval") ) { return zend_compile_func_cast(result, args, IS_DOUBLE); } else if (zend_string_equals_literal(lcname, "strval")) { return zend_compile_func_cast(result, args, IS_STRING); } else if (zend_string_equals_literal(lcname, "defined")) { return zend_compile_func_defined(result, args); } else if (zend_string_equals_literal(lcname, "chr") && type == BP_VAR_R) { return zend_compile_func_chr(result, args); } else if (zend_string_equals_literal(lcname, "ord") && type == BP_VAR_R) { return zend_compile_func_ord(result, args); } else if (zend_string_equals_literal(lcname, "call_user_func_array")) { return zend_compile_func_cufa(result, args, lcname); } else if (zend_string_equals_literal(lcname, "call_user_func")) { return zend_compile_func_cuf(result, args, lcname); } else if (zend_string_equals_literal(lcname, "in_array")) { return zend_compile_func_in_array(result, args); } else if (zend_string_equals_literal(lcname, "count") || zend_string_equals_literal(lcname, "sizeof")) { return zend_compile_func_count(result, args, lcname); } else if (zend_string_equals_literal(lcname, "get_class")) { return zend_compile_func_get_class(result, args); } else if (zend_string_equals_literal(lcname, "get_called_class")) { return zend_compile_func_get_called_class(result, args); } else if (zend_string_equals_literal(lcname, "gettype")) { return zend_compile_func_gettype(result, args); } else if (zend_string_equals_literal(lcname, "func_num_args")) { return zend_compile_func_num_args(result, args); } else if (zend_string_equals_literal(lcname, "func_get_args")) { return zend_compile_func_get_args(result, args); } else if (zend_string_equals_literal(lcname, "array_slice")) { return zend_compile_func_array_slice(result, args); } else if (zend_string_equals_literal(lcname, "array_key_exists")) { return zend_compile_func_array_key_exists(result, args); } else { return FAILURE; } } /* }}} */ void zend_compile_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */ { zend_ast *name_ast = ast->child[0]; zend_ast *args_ast = ast->child[1]; znode name_node; if (name_ast->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(name_ast)) != IS_STRING) { zend_compile_expr(&name_node, name_ast); zend_compile_dynamic_call(result, &name_node, args_ast); return; } { zend_bool runtime_resolution = zend_compile_function_name(&name_node, name_ast); if (runtime_resolution) { if (zend_string_equals_literal_ci(zend_ast_get_str(name_ast), "assert")) { zend_compile_assert(result, zend_ast_get_list(args_ast), Z_STR(name_node.u.constant), NULL); } else { zend_compile_ns_call(result, &name_node, args_ast); } return; } } { zval *name = &name_node.u.constant; zend_string *lcname; zend_function *fbc; zend_op *opline; lcname = zend_string_tolower(Z_STR_P(name)); fbc = zend_hash_find_ptr(CG(function_table), lcname); /* Special assert() handling should apply independently of compiler flags. */ if (fbc && zend_string_equals_literal(lcname, "assert")) { zend_compile_assert(result, zend_ast_get_list(args_ast), lcname, fbc); zend_string_release(lcname); zval_ptr_dtor(&name_node.u.constant); return; } if (!fbc || !fbc_is_finalized(fbc) || (fbc->type == ZEND_INTERNAL_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS)) || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS)) || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) && fbc->op_array.filename != CG(active_op_array)->filename) ) { zend_string_release_ex(lcname, 0); zend_compile_dynamic_call(result, &name_node, args_ast); return; } if (zend_try_compile_special_func(result, lcname, zend_ast_get_list(args_ast), fbc, type) == SUCCESS ) { zend_string_release_ex(lcname, 0); zval_ptr_dtor(&name_node.u.constant); return; } zval_ptr_dtor(&name_node.u.constant); ZVAL_NEW_STR(&name_node.u.constant, lcname); opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, &name_node); opline->result.num = zend_alloc_cache_slot(); zend_compile_call_common(result, args_ast, fbc); } } /* }}} */ void zend_compile_method_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */ { zend_ast *obj_ast = ast->child[0]; zend_ast *method_ast = ast->child[1]; zend_ast *args_ast = ast->child[2]; znode obj_node, method_node; zend_op *opline; zend_function *fbc = NULL; if (is_this_fetch(obj_ast)) { obj_node.op_type = IS_UNUSED; CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS; } else { zend_compile_expr(&obj_node, obj_ast); } zend_compile_expr(&method_node, method_ast); opline = zend_emit_op(NULL, ZEND_INIT_METHOD_CALL, &obj_node, NULL); if (method_node.op_type == IS_CONST) { if (Z_TYPE(method_node.u.constant) != IS_STRING) { zend_error_noreturn(E_COMPILE_ERROR, "Method name must be a string"); } opline->op2_type = IS_CONST; opline->op2.constant = zend_add_func_name_literal( Z_STR(method_node.u.constant)); opline->result.num = zend_alloc_cache_slots(2); } else { SET_NODE(opline->op2, &method_node); } /* Check if this calls a known method on $this */ if (opline->op1_type == IS_UNUSED && opline->op2_type == IS_CONST && CG(active_class_entry) && zend_is_scope_known()) { zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op2) + 1); fbc = zend_hash_find_ptr(&CG(active_class_entry)->function_table, lcname); /* We only know the exact method that is being called if it is either private or final. * Otherwise an overriding method in a child class may be called. */ if (fbc && !(fbc->common.fn_flags & (ZEND_ACC_PRIVATE|ZEND_ACC_FINAL))) { fbc = NULL; } } zend_compile_call_common(result, args_ast, fbc); } /* }}} */ static zend_bool zend_is_constructor(zend_string *name) /* {{{ */ { return zend_string_equals_literal_ci(name, ZEND_CONSTRUCTOR_FUNC_NAME); } /* }}} */ void zend_compile_static_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */ { zend_ast *class_ast = ast->child[0]; zend_ast *method_ast = ast->child[1]; zend_ast *args_ast = ast->child[2]; znode class_node, method_node; zend_op *opline; zend_function *fbc = NULL; zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION); zend_compile_expr(&method_node, method_ast); if (method_node.op_type == IS_CONST) { zval *name = &method_node.u.constant; if (Z_TYPE_P(name) != IS_STRING) { zend_error_noreturn(E_COMPILE_ERROR, "Method name must be a string"); } if (zend_is_constructor(Z_STR_P(name))) { zval_ptr_dtor(name); method_node.op_type = IS_UNUSED; } } opline = get_next_op(); opline->opcode = ZEND_INIT_STATIC_METHOD_CALL; zend_set_class_name_op1(opline, &class_node); if (method_node.op_type == IS_CONST) { opline->op2_type = IS_CONST; opline->op2.constant = zend_add_func_name_literal( Z_STR(method_node.u.constant)); opline->result.num = zend_alloc_cache_slots(2); } else { if (opline->op1_type == IS_CONST) { opline->result.num = zend_alloc_cache_slot(); } SET_NODE(opline->op2, &method_node); } /* Check if we already know which method we're calling */ if (opline->op2_type == IS_CONST) { zend_class_entry *ce = NULL; if (opline->op1_type == IS_CONST) { zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op1) + 1); ce = zend_hash_find_ptr(CG(class_table), lcname); if (!ce && CG(active_class_entry) && zend_string_equals_ci(CG(active_class_entry)->name, lcname)) { ce = CG(active_class_entry); } } else if (opline->op1_type == IS_UNUSED && (opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF && zend_is_scope_known()) { ce = CG(active_class_entry); } if (ce) { zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op2) + 1); fbc = zend_hash_find_ptr(&ce->function_table, lcname); if (fbc && !(fbc->common.fn_flags & ZEND_ACC_PUBLIC)) { if (ce != CG(active_class_entry) && ((fbc->common.fn_flags & ZEND_ACC_PRIVATE) || !(fbc->common.scope->ce_flags & ZEND_ACC_LINKED) || (CG(active_class_entry) && !(CG(active_class_entry)->ce_flags & ZEND_ACC_LINKED)) || !zend_check_protected(zend_get_function_root_class(fbc), CG(active_class_entry)))) { /* incompatibe function */ fbc = NULL; } } } } zend_compile_call_common(result, args_ast, fbc); } /* }}} */ zend_op *zend_compile_class_decl(zend_ast *ast, zend_bool toplevel); void zend_compile_new(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *class_ast = ast->child[0]; zend_ast *args_ast = ast->child[1]; znode class_node, ctor_result; zend_op *opline; if (class_ast->kind == ZEND_AST_CLASS) { /* anon class declaration */ opline = zend_compile_class_decl(class_ast, 0); class_node.op_type = opline->result_type; class_node.u.op.var = opline->result.var; } else { zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION); } opline = zend_emit_op(result, ZEND_NEW, NULL, NULL); if (class_node.op_type == IS_CONST) { opline->op1_type = IS_CONST; opline->op1.constant = zend_add_class_name_literal( Z_STR(class_node.u.constant)); opline->op2.num = zend_alloc_cache_slot(); } else { SET_NODE(opline->op1, &class_node); } zend_compile_call_common(&ctor_result, args_ast, NULL); zend_do_free(&ctor_result); } /* }}} */ void zend_compile_clone(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *obj_ast = ast->child[0]; znode obj_node; zend_compile_expr(&obj_node, obj_ast); zend_emit_op_tmp(result, ZEND_CLONE, &obj_node, NULL); } /* }}} */ void zend_compile_global_var(zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; zend_ast *name_ast = var_ast->child[0]; znode name_node, result; zend_compile_expr(&name_node, name_ast); if (name_node.op_type == IS_CONST) { convert_to_string(&name_node.u.constant); } if (is_this_fetch(var_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as global variable"); } else if (zend_try_compile_cv(&result, var_ast) == SUCCESS) { zend_op *opline = zend_emit_op(NULL, ZEND_BIND_GLOBAL, &result, &name_node); opline->extended_value = zend_alloc_cache_slot(); } else { /* name_ast should be evaluated only. FETCH_GLOBAL_LOCK instructs FETCH_W * to not free the name_node operand, so it can be reused in the following * ASSIGN_REF, which then frees it. */ zend_op *opline = zend_emit_op(&result, ZEND_FETCH_W, &name_node, NULL); opline->extended_value = ZEND_FETCH_GLOBAL_LOCK; if (name_node.op_type == IS_CONST) { zend_string_addref(Z_STR(name_node.u.constant)); } zend_emit_assign_ref_znode( zend_ast_create(ZEND_AST_VAR, zend_ast_create_znode(&name_node)), &result ); } } /* }}} */ static void zend_compile_static_var_common(zend_string *var_name, zval *value, uint32_t mode) /* {{{ */ { zend_op *opline; if (!CG(active_op_array)->static_variables) { if (CG(active_op_array)->scope) { CG(active_op_array)->scope->ce_flags |= ZEND_HAS_STATIC_IN_METHODS; } CG(active_op_array)->static_variables = zend_new_array(8); } value = zend_hash_update(CG(active_op_array)->static_variables, var_name, value); if (zend_string_equals_literal(var_name, "this")) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as static variable"); } opline = zend_emit_op(NULL, ZEND_BIND_STATIC, NULL, NULL); opline->op1_type = IS_CV; opline->op1.var = lookup_cv(var_name); opline->extended_value = (uint32_t)((char*)value - (char*)CG(active_op_array)->static_variables->arData) | mode; } /* }}} */ void zend_compile_static_var(zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; zend_ast *value_ast = ast->child[1]; zval value_zv; if (value_ast) { zend_const_expr_to_zval(&value_zv, value_ast); } else { ZVAL_NULL(&value_zv); } zend_compile_static_var_common(zend_ast_get_str(var_ast), &value_zv, ZEND_BIND_REF); } /* }}} */ void zend_compile_unset(zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; znode var_node; zend_op *opline; zend_ensure_writable_variable(var_ast); switch (var_ast->kind) { case ZEND_AST_VAR: if (is_this_fetch(var_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot unset $this"); } else if (zend_try_compile_cv(&var_node, var_ast) == SUCCESS) { opline = zend_emit_op(NULL, ZEND_UNSET_CV, &var_node, NULL); } else { opline = zend_compile_simple_var_no_cv(NULL, var_ast, BP_VAR_UNSET, 0); opline->opcode = ZEND_UNSET_VAR; } return; case ZEND_AST_DIM: opline = zend_compile_dim(NULL, var_ast, BP_VAR_UNSET); opline->opcode = ZEND_UNSET_DIM; return; case ZEND_AST_PROP: opline = zend_compile_prop(NULL, var_ast, BP_VAR_UNSET, 0); opline->opcode = ZEND_UNSET_OBJ; return; case ZEND_AST_STATIC_PROP: opline = zend_compile_static_prop(NULL, var_ast, BP_VAR_UNSET, 0, 0); opline->opcode = ZEND_UNSET_STATIC_PROP; return; EMPTY_SWITCH_DEFAULT_CASE() } } /* }}} */ static int zend_handle_loops_and_finally_ex(zend_long depth, znode *return_value) /* {{{ */ { zend_loop_var *base; zend_loop_var *loop_var = zend_stack_top(&CG(loop_var_stack)); if (!loop_var) { return 1; } base = zend_stack_base(&CG(loop_var_stack)); for (; loop_var >= base; loop_var--) { if (loop_var->opcode == ZEND_FAST_CALL) { zend_op *opline = get_next_op(); opline->opcode = ZEND_FAST_CALL; opline->result_type = IS_TMP_VAR; opline->result.var = loop_var->var_num; if (return_value) { SET_NODE(opline->op2, return_value); } opline->op1.num = loop_var->try_catch_offset; } else if (loop_var->opcode == ZEND_DISCARD_EXCEPTION) { zend_op *opline = get_next_op(); opline->opcode = ZEND_DISCARD_EXCEPTION; opline->op1_type = IS_TMP_VAR; opline->op1.var = loop_var->var_num; } else if (loop_var->opcode == ZEND_RETURN) { /* Stack separator */ break; } else if (depth <= 1) { return 1; } else if (loop_var->opcode == ZEND_NOP) { /* Loop doesn't have freeable variable */ depth--; } else { zend_op *opline; ZEND_ASSERT(loop_var->var_type & (IS_VAR|IS_TMP_VAR)); opline = get_next_op(); opline->opcode = loop_var->opcode; opline->op1_type = loop_var->var_type; opline->op1.var = loop_var->var_num; opline->extended_value = ZEND_FREE_ON_RETURN; depth--; } } return (depth == 0); } /* }}} */ static int zend_handle_loops_and_finally(znode *return_value) /* {{{ */ { return zend_handle_loops_and_finally_ex(zend_stack_count(&CG(loop_var_stack)) + 1, return_value); } /* }}} */ static int zend_has_finally_ex(zend_long depth) /* {{{ */ { zend_loop_var *base; zend_loop_var *loop_var = zend_stack_top(&CG(loop_var_stack)); if (!loop_var) { return 0; } base = zend_stack_base(&CG(loop_var_stack)); for (; loop_var >= base; loop_var--) { if (loop_var->opcode == ZEND_FAST_CALL) { return 1; } else if (loop_var->opcode == ZEND_DISCARD_EXCEPTION) { } else if (loop_var->opcode == ZEND_RETURN) { /* Stack separator */ return 0; } else if (depth <= 1) { return 0; } else { depth--; } } return 0; } /* }}} */ static int zend_has_finally(void) /* {{{ */ { return zend_has_finally_ex(zend_stack_count(&CG(loop_var_stack)) + 1); } /* }}} */ void zend_compile_return(zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; zend_bool is_generator = (CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) != 0; zend_bool by_ref = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0; znode expr_node; zend_op *opline; if (is_generator) { /* For generators the by-ref flag refers to yields, not returns */ by_ref = 0; } if (!expr_ast) { expr_node.op_type = IS_CONST; ZVAL_NULL(&expr_node.u.constant); } else if (by_ref && zend_is_variable(expr_ast)) { zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1); } else { zend_compile_expr(&expr_node, expr_ast); } if ((CG(active_op_array)->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK) && (expr_node.op_type == IS_CV || (by_ref && expr_node.op_type == IS_VAR)) && zend_has_finally()) { /* Copy return value into temporary VAR to avoid modification in finally code */ if (by_ref) { zend_emit_op(&expr_node, ZEND_MAKE_REF, &expr_node, NULL); } else { zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &expr_node, NULL); } } /* Generator return types are handled separately */ if (!is_generator && CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) { zend_emit_return_type_check( expr_ast ? &expr_node : NULL, CG(active_op_array)->arg_info - 1, 0); } zend_handle_loops_and_finally((expr_node.op_type & (IS_TMP_VAR | IS_VAR)) ? &expr_node : NULL); opline = zend_emit_op(NULL, by_ref ? ZEND_RETURN_BY_REF : ZEND_RETURN, &expr_node, NULL); if (by_ref && expr_ast) { if (zend_is_call(expr_ast)) { opline->extended_value = ZEND_RETURNS_FUNCTION; } else if (!zend_is_variable(expr_ast)) { opline->extended_value = ZEND_RETURNS_VALUE; } } } /* }}} */ void zend_compile_echo(zend_ast *ast) /* {{{ */ { zend_op *opline; zend_ast *expr_ast = ast->child[0]; znode expr_node; zend_compile_expr(&expr_node, expr_ast); opline = zend_emit_op(NULL, ZEND_ECHO, &expr_node, NULL); opline->extended_value = 0; } /* }}} */ void zend_compile_throw(zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; znode expr_node; zend_compile_expr(&expr_node, expr_ast); zend_emit_op(NULL, ZEND_THROW, &expr_node, NULL); } /* }}} */ void zend_compile_break_continue(zend_ast *ast) /* {{{ */ { zend_ast *depth_ast = ast->child[0]; zend_op *opline; zend_long depth; ZEND_ASSERT(ast->kind == ZEND_AST_BREAK || ast->kind == ZEND_AST_CONTINUE); if (depth_ast) { zval *depth_zv; if (depth_ast->kind != ZEND_AST_ZVAL) { zend_error_noreturn(E_COMPILE_ERROR, "'%s' operator with non-integer operand " "is no longer supported", ast->kind == ZEND_AST_BREAK ? "break" : "continue"); } depth_zv = zend_ast_get_zval(depth_ast); if (Z_TYPE_P(depth_zv) != IS_LONG || Z_LVAL_P(depth_zv) < 1) { zend_error_noreturn(E_COMPILE_ERROR, "'%s' operator accepts only positive integers", ast->kind == ZEND_AST_BREAK ? "break" : "continue"); } depth = Z_LVAL_P(depth_zv); } else { depth = 1; } if (CG(context).current_brk_cont == -1) { zend_error_noreturn(E_COMPILE_ERROR, "'%s' not in the 'loop' or 'switch' context", ast->kind == ZEND_AST_BREAK ? "break" : "continue"); } else { if (!zend_handle_loops_and_finally_ex(depth, NULL)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot '%s' " ZEND_LONG_FMT " level%s", ast->kind == ZEND_AST_BREAK ? "break" : "continue", depth, depth == 1 ? "" : "s"); } } if (ast->kind == ZEND_AST_CONTINUE) { int d, cur = CG(context).current_brk_cont; for (d = depth - 1; d > 0; d--) { cur = CG(context).brk_cont_array[cur].parent; ZEND_ASSERT(cur != -1); } if (CG(context).brk_cont_array[cur].is_switch) { if (depth == 1) { zend_error(E_WARNING, "\"continue\" targeting switch is equivalent to \"break\". " \ "Did you mean to use \"continue " ZEND_LONG_FMT "\"?", depth + 1); } else { zend_error(E_WARNING, "\"continue " ZEND_LONG_FMT "\" targeting switch is equivalent to \"break " ZEND_LONG_FMT "\". " \ "Did you mean to use \"continue " ZEND_LONG_FMT "\"?", depth, depth, depth + 1); } } } opline = zend_emit_op(NULL, ast->kind == ZEND_AST_BREAK ? ZEND_BRK : ZEND_CONT, NULL, NULL); opline->op1.num = CG(context).current_brk_cont; opline->op2.num = depth; } /* }}} */ void zend_resolve_goto_label(zend_op_array *op_array, zend_op *opline) /* {{{ */ { zend_label *dest; int current, remove_oplines = opline->op1.num; zval *label; uint32_t opnum = opline - op_array->opcodes; label = CT_CONSTANT_EX(op_array, opline->op2.constant); if (CG(context).labels == NULL || (dest = zend_hash_find_ptr(CG(context).labels, Z_STR_P(label))) == NULL ) { CG(in_compilation) = 1; CG(active_op_array) = op_array; CG(zend_lineno) = opline->lineno; zend_error_noreturn(E_COMPILE_ERROR, "'goto' to undefined label '%s'", Z_STRVAL_P(label)); } zval_ptr_dtor_str(label); ZVAL_NULL(label); current = opline->extended_value; for (; current != dest->brk_cont; current = CG(context).brk_cont_array[current].parent) { if (current == -1) { CG(in_compilation) = 1; CG(active_op_array) = op_array; CG(zend_lineno) = opline->lineno; zend_error_noreturn(E_COMPILE_ERROR, "'goto' into loop or switch statement is disallowed"); } if (CG(context).brk_cont_array[current].start >= 0) { remove_oplines--; } } for (current = 0; current < op_array->last_try_catch; ++current) { zend_try_catch_element *elem = &op_array->try_catch_array[current]; if (elem->try_op > opnum) { break; } if (elem->finally_op && opnum < elem->finally_op - 1 && (dest->opline_num > elem->finally_end || dest->opline_num < elem->try_op) ) { remove_oplines--; } } opline->opcode = ZEND_JMP; opline->op1.opline_num = dest->opline_num; opline->extended_value = 0; SET_UNUSED(opline->op1); SET_UNUSED(opline->op2); SET_UNUSED(opline->result); ZEND_ASSERT(remove_oplines >= 0); while (remove_oplines--) { opline--; MAKE_NOP(opline); ZEND_VM_SET_OPCODE_HANDLER(opline); } } /* }}} */ void zend_compile_goto(zend_ast *ast) /* {{{ */ { zend_ast *label_ast = ast->child[0]; znode label_node; zend_op *opline; uint32_t opnum_start = get_next_op_number(); zend_compile_expr(&label_node, label_ast); /* Label resolution and unwinding adjustments happen in pass two. */ zend_handle_loops_and_finally(NULL); opline = zend_emit_op(NULL, ZEND_GOTO, NULL, &label_node); opline->op1.num = get_next_op_number() - opnum_start - 1; opline->extended_value = CG(context).current_brk_cont; } /* }}} */ void zend_compile_label(zend_ast *ast) /* {{{ */ { zend_string *label = zend_ast_get_str(ast->child[0]); zend_label dest; if (!CG(context).labels) { ALLOC_HASHTABLE(CG(context).labels); zend_hash_init(CG(context).labels, 8, NULL, label_ptr_dtor, 0); } dest.brk_cont = CG(context).current_brk_cont; dest.opline_num = get_next_op_number(); if (!zend_hash_add_mem(CG(context).labels, label, &dest, sizeof(zend_label))) { zend_error_noreturn(E_COMPILE_ERROR, "Label '%s' already defined", ZSTR_VAL(label)); } } /* }}} */ void zend_compile_while(zend_ast *ast) /* {{{ */ { zend_ast *cond_ast = ast->child[0]; zend_ast *stmt_ast = ast->child[1]; znode cond_node; uint32_t opnum_start, opnum_jmp, opnum_cond; opnum_jmp = zend_emit_jump(0); zend_begin_loop(ZEND_NOP, NULL, 0); opnum_start = get_next_op_number(); zend_compile_stmt(stmt_ast); opnum_cond = get_next_op_number(); zend_update_jump_target(opnum_jmp, opnum_cond); zend_compile_expr(&cond_node, cond_ast); zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, opnum_start); zend_end_loop(opnum_cond, NULL); } /* }}} */ void zend_compile_do_while(zend_ast *ast) /* {{{ */ { zend_ast *stmt_ast = ast->child[0]; zend_ast *cond_ast = ast->child[1]; znode cond_node; uint32_t opnum_start, opnum_cond; zend_begin_loop(ZEND_NOP, NULL, 0); opnum_start = get_next_op_number(); zend_compile_stmt(stmt_ast); opnum_cond = get_next_op_number(); zend_compile_expr(&cond_node, cond_ast); zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, opnum_start); zend_end_loop(opnum_cond, NULL); } /* }}} */ void zend_compile_expr_list(znode *result, zend_ast *ast) /* {{{ */ { zend_ast_list *list; uint32_t i; result->op_type = IS_CONST; ZVAL_TRUE(&result->u.constant); if (!ast) { return; } list = zend_ast_get_list(ast); for (i = 0; i < list->children; ++i) { zend_ast *expr_ast = list->child[i]; zend_do_free(result); zend_compile_expr(result, expr_ast); } } /* }}} */ void zend_compile_for(zend_ast *ast) /* {{{ */ { zend_ast *init_ast = ast->child[0]; zend_ast *cond_ast = ast->child[1]; zend_ast *loop_ast = ast->child[2]; zend_ast *stmt_ast = ast->child[3]; znode result; uint32_t opnum_start, opnum_jmp, opnum_loop; zend_compile_expr_list(&result, init_ast); zend_do_free(&result); opnum_jmp = zend_emit_jump(0); zend_begin_loop(ZEND_NOP, NULL, 0); opnum_start = get_next_op_number(); zend_compile_stmt(stmt_ast); opnum_loop = get_next_op_number(); zend_compile_expr_list(&result, loop_ast); zend_do_free(&result); zend_update_jump_target_to_next(opnum_jmp); zend_compile_expr_list(&result, cond_ast); zend_do_extended_stmt(); zend_emit_cond_jump(ZEND_JMPNZ, &result, opnum_start); zend_end_loop(opnum_loop, NULL); } /* }}} */ void zend_compile_foreach(zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; zend_ast *value_ast = ast->child[1]; zend_ast *key_ast = ast->child[2]; zend_ast *stmt_ast = ast->child[3]; zend_bool by_ref = value_ast->kind == ZEND_AST_REF; zend_bool is_variable = zend_is_variable(expr_ast) && zend_can_write_to_variable(expr_ast); znode expr_node, reset_node, value_node, key_node; zend_op *opline; uint32_t opnum_reset, opnum_fetch; if (key_ast) { if (key_ast->kind == ZEND_AST_REF) { zend_error_noreturn(E_COMPILE_ERROR, "Key element cannot be a reference"); } if (key_ast->kind == ZEND_AST_ARRAY) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use list as key element"); } } if (by_ref) { value_ast = value_ast->child[0]; } if (value_ast->kind == ZEND_AST_ARRAY && zend_propagate_list_refs(value_ast)) { by_ref = 1; } if (by_ref && is_variable) { zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1); } else { zend_compile_expr(&expr_node, expr_ast); } if (by_ref) { zend_separate_if_call_and_write(&expr_node, expr_ast, BP_VAR_W); } opnum_reset = get_next_op_number(); opline = zend_emit_op(&reset_node, by_ref ? ZEND_FE_RESET_RW : ZEND_FE_RESET_R, &expr_node, NULL); zend_begin_loop(ZEND_FE_FREE, &reset_node, 0); opnum_fetch = get_next_op_number(); opline = zend_emit_op(NULL, by_ref ? ZEND_FE_FETCH_RW : ZEND_FE_FETCH_R, &reset_node, NULL); if (is_this_fetch(value_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this"); } else if (value_ast->kind == ZEND_AST_VAR && zend_try_compile_cv(&value_node, value_ast) == SUCCESS) { SET_NODE(opline->op2, &value_node); } else { opline->op2_type = IS_VAR; opline->op2.var = get_temporary_variable(); GET_NODE(&value_node, opline->op2); if (value_ast->kind == ZEND_AST_ARRAY) { zend_compile_list_assign(NULL, value_ast, &value_node, value_ast->attr); } else if (by_ref) { zend_emit_assign_ref_znode(value_ast, &value_node); } else { zend_emit_assign_znode(value_ast, &value_node); } } if (key_ast) { opline = &CG(active_op_array)->opcodes[opnum_fetch]; zend_make_tmp_result(&key_node, opline); zend_emit_assign_znode(key_ast, &key_node); } zend_compile_stmt(stmt_ast); /* Place JMP and FE_FREE on the line where foreach starts. It would be * better to use the end line, but this information is not available * currently. */ CG(zend_lineno) = ast->lineno; zend_emit_jump(opnum_fetch); opline = &CG(active_op_array)->opcodes[opnum_reset]; opline->op2.opline_num = get_next_op_number(); opline = &CG(active_op_array)->opcodes[opnum_fetch]; opline->extended_value = get_next_op_number(); zend_end_loop(opnum_fetch, &reset_node); opline = zend_emit_op(NULL, ZEND_FE_FREE, &reset_node, NULL); } /* }}} */ void zend_compile_if(zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; uint32_t *jmp_opnums = NULL; if (list->children > 1) { jmp_opnums = safe_emalloc(sizeof(uint32_t), list->children - 1, 0); } for (i = 0; i < list->children; ++i) { zend_ast *elem_ast = list->child[i]; zend_ast *cond_ast = elem_ast->child[0]; zend_ast *stmt_ast = elem_ast->child[1]; if (cond_ast) { znode cond_node; uint32_t opnum_jmpz; zend_compile_expr(&cond_node, cond_ast); opnum_jmpz = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0); zend_compile_stmt(stmt_ast); if (i != list->children - 1) { jmp_opnums[i] = zend_emit_jump(0); } zend_update_jump_target_to_next(opnum_jmpz); } else { /* "else" can only occur as last element. */ ZEND_ASSERT(i == list->children - 1); zend_compile_stmt(stmt_ast); } } if (list->children > 1) { for (i = 0; i < list->children - 1; ++i) { zend_update_jump_target_to_next(jmp_opnums[i]); } efree(jmp_opnums); } } /* }}} */ static zend_uchar determine_switch_jumptable_type(zend_ast_list *cases) { uint32_t i; zend_uchar common_type = IS_UNDEF; for (i = 0; i < cases->children; i++) { zend_ast *case_ast = cases->child[i]; zend_ast **cond_ast = &case_ast->child[0]; zval *cond_zv; if (!case_ast->child[0]) { /* Skip default clause */ continue; } zend_eval_const_expr(cond_ast); if ((*cond_ast)->kind != ZEND_AST_ZVAL) { /* Non-constant case */ return IS_UNDEF; } cond_zv = zend_ast_get_zval(case_ast->child[0]); if (Z_TYPE_P(cond_zv) != IS_LONG && Z_TYPE_P(cond_zv) != IS_STRING) { /* We only optimize switched on integers and strings */ return IS_UNDEF; } if (common_type == IS_UNDEF) { common_type = Z_TYPE_P(cond_zv); } else if (common_type != Z_TYPE_P(cond_zv)) { /* Non-uniform case types */ return IS_UNDEF; } if (Z_TYPE_P(cond_zv) == IS_STRING && is_numeric_string(Z_STRVAL_P(cond_zv), Z_STRLEN_P(cond_zv), NULL, NULL, 0)) { /* Numeric strings cannot be compared with a simple hash lookup */ return IS_UNDEF; } } return common_type; } static zend_bool should_use_jumptable(zend_ast_list *cases, zend_uchar jumptable_type) { if (CG(compiler_options) & ZEND_COMPILE_NO_JUMPTABLES) { return 0; } /* Thresholds are chosen based on when the average switch time for equidistributed * input becomes smaller when using the jumptable optimization. */ if (jumptable_type == IS_LONG) { return cases->children >= 5; } else { ZEND_ASSERT(jumptable_type == IS_STRING); return cases->children >= 2; } } void zend_compile_switch(zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; zend_ast_list *cases = zend_ast_get_list(ast->child[1]); uint32_t i; zend_bool has_default_case = 0; znode expr_node, case_node; zend_op *opline; uint32_t *jmpnz_opnums, opnum_default_jmp, opnum_switch = (uint32_t)-1; zend_uchar jumptable_type; HashTable *jumptable = NULL; zend_compile_expr(&expr_node, expr_ast); zend_begin_loop(ZEND_FREE, &expr_node, 1); case_node.op_type = IS_TMP_VAR; case_node.u.op.var = get_temporary_variable(); jumptable_type = determine_switch_jumptable_type(cases); if (jumptable_type != IS_UNDEF && should_use_jumptable(cases, jumptable_type)) { znode jumptable_op; ALLOC_HASHTABLE(jumptable); zend_hash_init(jumptable, cases->children, NULL, NULL, 0); jumptable_op.op_type = IS_CONST; ZVAL_ARR(&jumptable_op.u.constant, jumptable); opline = zend_emit_op(NULL, jumptable_type == IS_LONG ? ZEND_SWITCH_LONG : ZEND_SWITCH_STRING, &expr_node, &jumptable_op); if (opline->op1_type == IS_CONST) { Z_TRY_ADDREF_P(CT_CONSTANT(opline->op1)); } opnum_switch = opline - CG(active_op_array)->opcodes; } jmpnz_opnums = safe_emalloc(sizeof(uint32_t), cases->children, 0); for (i = 0; i < cases->children; ++i) { zend_ast *case_ast = cases->child[i]; zend_ast *cond_ast = case_ast->child[0]; znode cond_node; if (!cond_ast) { if (has_default_case) { CG(zend_lineno) = case_ast->lineno; zend_error_noreturn(E_COMPILE_ERROR, "Switch statements may only contain one default clause"); } has_default_case = 1; continue; } zend_compile_expr(&cond_node, cond_ast); if (expr_node.op_type == IS_CONST && Z_TYPE(expr_node.u.constant) == IS_FALSE) { jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0); } else if (expr_node.op_type == IS_CONST && Z_TYPE(expr_node.u.constant) == IS_TRUE) { jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, 0); } else { opline = zend_emit_op(NULL, (expr_node.op_type & (IS_VAR|IS_TMP_VAR)) ? ZEND_CASE : ZEND_IS_EQUAL, &expr_node, &cond_node); SET_NODE(opline->result, &case_node); if (opline->op1_type == IS_CONST) { Z_TRY_ADDREF_P(CT_CONSTANT(opline->op1)); } jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPNZ, &case_node, 0); } } opnum_default_jmp = zend_emit_jump(0); for (i = 0; i < cases->children; ++i) { zend_ast *case_ast = cases->child[i]; zend_ast *cond_ast = case_ast->child[0]; zend_ast *stmt_ast = case_ast->child[1]; if (cond_ast) { zend_update_jump_target_to_next(jmpnz_opnums[i]); if (jumptable) { zval *cond_zv = zend_ast_get_zval(cond_ast); zval jmp_target; ZVAL_LONG(&jmp_target, get_next_op_number()); ZEND_ASSERT(Z_TYPE_P(cond_zv) == jumptable_type); if (Z_TYPE_P(cond_zv) == IS_LONG) { zend_hash_index_add(jumptable, Z_LVAL_P(cond_zv), &jmp_target); } else { ZEND_ASSERT(Z_TYPE_P(cond_zv) == IS_STRING); zend_hash_add(jumptable, Z_STR_P(cond_zv), &jmp_target); } } } else { zend_update_jump_target_to_next(opnum_default_jmp); if (jumptable) { ZEND_ASSERT(opnum_switch != (uint32_t)-1); opline = &CG(active_op_array)->opcodes[opnum_switch]; opline->extended_value = get_next_op_number(); } } zend_compile_stmt(stmt_ast); } if (!has_default_case) { zend_update_jump_target_to_next(opnum_default_jmp); if (jumptable) { opline = &CG(active_op_array)->opcodes[opnum_switch]; opline->extended_value = get_next_op_number(); } } zend_end_loop(get_next_op_number(), &expr_node); if (expr_node.op_type & (IS_VAR|IS_TMP_VAR)) { opline = zend_emit_op(NULL, ZEND_FREE, &expr_node, NULL); opline->extended_value = ZEND_FREE_SWITCH; } else if (expr_node.op_type == IS_CONST) { zval_ptr_dtor_nogc(&expr_node.u.constant); } efree(jmpnz_opnums); } /* }}} */ void zend_compile_try(zend_ast *ast) /* {{{ */ { zend_ast *try_ast = ast->child[0]; zend_ast_list *catches = zend_ast_get_list(ast->child[1]); zend_ast *finally_ast = ast->child[2]; uint32_t i, j; zend_op *opline; uint32_t try_catch_offset; uint32_t *jmp_opnums = safe_emalloc(sizeof(uint32_t), catches->children, 0); uint32_t orig_fast_call_var = CG(context).fast_call_var; uint32_t orig_try_catch_offset = CG(context).try_catch_offset; if (catches->children == 0 && !finally_ast) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use try without catch or finally"); } /* label: try { } must not be equal to try { label: } */ if (CG(context).labels) { zend_label *label; ZEND_HASH_REVERSE_FOREACH_PTR(CG(context).labels, label) { if (label->opline_num == get_next_op_number()) { zend_emit_op(NULL, ZEND_NOP, NULL, NULL); } break; } ZEND_HASH_FOREACH_END(); } try_catch_offset = zend_add_try_element(get_next_op_number()); if (finally_ast) { zend_loop_var fast_call; if (!(CG(active_op_array)->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK)) { CG(active_op_array)->fn_flags |= ZEND_ACC_HAS_FINALLY_BLOCK; } CG(context).fast_call_var = get_temporary_variable(); /* Push FAST_CALL on unwind stack */ fast_call.opcode = ZEND_FAST_CALL; fast_call.var_type = IS_TMP_VAR; fast_call.var_num = CG(context).fast_call_var; fast_call.try_catch_offset = try_catch_offset; zend_stack_push(&CG(loop_var_stack), &fast_call); } CG(context).try_catch_offset = try_catch_offset; zend_compile_stmt(try_ast); if (catches->children != 0) { jmp_opnums[0] = zend_emit_jump(0); } for (i = 0; i < catches->children; ++i) { zend_ast *catch_ast = catches->child[i]; zend_ast_list *classes = zend_ast_get_list(catch_ast->child[0]); zend_ast *var_ast = catch_ast->child[1]; zend_ast *stmt_ast = catch_ast->child[2]; zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_ast)); zend_bool is_last_catch = (i + 1 == catches->children); uint32_t *jmp_multicatch = safe_emalloc(sizeof(uint32_t), classes->children - 1, 0); uint32_t opnum_catch = (uint32_t)-1; CG(zend_lineno) = catch_ast->lineno; for (j = 0; j < classes->children; j++) { zend_ast *class_ast = classes->child[j]; zend_bool is_last_class = (j + 1 == classes->children); if (!zend_is_const_default_class_ref(class_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Bad class name in the catch statement"); } opnum_catch = get_next_op_number(); if (i == 0 && j == 0) { CG(active_op_array)->try_catch_array[try_catch_offset].catch_op = opnum_catch; } opline = get_next_op(); opline->opcode = ZEND_CATCH; opline->op1_type = IS_CONST; opline->op1.constant = zend_add_class_name_literal( zend_resolve_class_name_ast(class_ast)); opline->extended_value = zend_alloc_cache_slot(); if (zend_string_equals_literal(var_name, "this")) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this"); } opline->result_type = IS_CV; opline->result.var = lookup_cv(var_name); if (is_last_catch && is_last_class) { opline->extended_value |= ZEND_LAST_CATCH; } if (!is_last_class) { jmp_multicatch[j] = zend_emit_jump(0); opline = &CG(active_op_array)->opcodes[opnum_catch]; opline->op2.opline_num = get_next_op_number(); } } for (j = 0; j < classes->children - 1; j++) { zend_update_jump_target_to_next(jmp_multicatch[j]); } efree(jmp_multicatch); zend_compile_stmt(stmt_ast); if (!is_last_catch) { jmp_opnums[i + 1] = zend_emit_jump(0); } ZEND_ASSERT(opnum_catch != (uint32_t)-1 && "Should have at least one class"); opline = &CG(active_op_array)->opcodes[opnum_catch]; if (!is_last_catch) { opline->op2.opline_num = get_next_op_number(); } } for (i = 0; i < catches->children; ++i) { zend_update_jump_target_to_next(jmp_opnums[i]); } if (finally_ast) { zend_loop_var discard_exception; uint32_t opnum_jmp = get_next_op_number() + 1; /* Pop FAST_CALL from unwind stack */ zend_stack_del_top(&CG(loop_var_stack)); /* Push DISCARD_EXCEPTION on unwind stack */ discard_exception.opcode = ZEND_DISCARD_EXCEPTION; discard_exception.var_type = IS_TMP_VAR; discard_exception.var_num = CG(context).fast_call_var; zend_stack_push(&CG(loop_var_stack), &discard_exception); CG(zend_lineno) = finally_ast->lineno; opline = zend_emit_op(NULL, ZEND_FAST_CALL, NULL, NULL); opline->op1.num = try_catch_offset; opline->result_type = IS_TMP_VAR; opline->result.var = CG(context).fast_call_var; zend_emit_op(NULL, ZEND_JMP, NULL, NULL); zend_compile_stmt(finally_ast); CG(active_op_array)->try_catch_array[try_catch_offset].finally_op = opnum_jmp + 1; CG(active_op_array)->try_catch_array[try_catch_offset].finally_end = get_next_op_number(); opline = zend_emit_op(NULL, ZEND_FAST_RET, NULL, NULL); opline->op1_type = IS_TMP_VAR; opline->op1.var = CG(context).fast_call_var; opline->op2.num = orig_try_catch_offset; zend_update_jump_target_to_next(opnum_jmp); CG(context).fast_call_var = orig_fast_call_var; /* Pop DISCARD_EXCEPTION from unwind stack */ zend_stack_del_top(&CG(loop_var_stack)); } CG(context).try_catch_offset = orig_try_catch_offset; efree(jmp_opnums); } /* }}} */ /* Encoding declarations must already be handled during parsing */ zend_bool zend_handle_encoding_declaration(zend_ast *ast) /* {{{ */ { zend_ast_list *declares = zend_ast_get_list(ast); uint32_t i; for (i = 0; i < declares->children; ++i) { zend_ast *declare_ast = declares->child[i]; zend_ast *name_ast = declare_ast->child[0]; zend_ast *value_ast = declare_ast->child[1]; zend_string *name = zend_ast_get_str(name_ast); if (zend_string_equals_literal_ci(name, "encoding")) { if (value_ast->kind != ZEND_AST_ZVAL) { zend_throw_exception(zend_ce_compile_error, "Encoding must be a literal", 0); return 0; } if (CG(multibyte)) { zend_string *encoding_name = zval_get_string(zend_ast_get_zval(value_ast)); const zend_encoding *new_encoding, *old_encoding; zend_encoding_filter old_input_filter; CG(encoding_declared) = 1; new_encoding = zend_multibyte_fetch_encoding(ZSTR_VAL(encoding_name)); if (!new_encoding) { zend_error(E_COMPILE_WARNING, "Unsupported encoding [%s]", ZSTR_VAL(encoding_name)); } else { old_input_filter = LANG_SCNG(input_filter); old_encoding = LANG_SCNG(script_encoding); zend_multibyte_set_filter(new_encoding); /* need to re-scan if input filter changed */ if (old_input_filter != LANG_SCNG(input_filter) || (old_input_filter && new_encoding != old_encoding)) { zend_multibyte_yyinput_again(old_input_filter, old_encoding); } } zend_string_release_ex(encoding_name, 0); } else { zend_error(E_COMPILE_WARNING, "declare(encoding=...) ignored because " "Zend multibyte feature is turned off by settings"); } } } return 1; } /* }}} */ static int zend_declare_is_first_statement(zend_ast *ast) /* {{{ */ { uint32_t i = 0; zend_ast_list *file_ast = zend_ast_get_list(CG(ast)); /* Check to see if this declare is preceded only by declare statements */ while (i < file_ast->children) { if (file_ast->child[i] == ast) { return SUCCESS; } else if (file_ast->child[i] == NULL) { /* Empty statements are not allowed prior to a declare */ return FAILURE; } else if (file_ast->child[i]->kind != ZEND_AST_DECLARE) { /* declares can only be preceded by other declares */ return FAILURE; } i++; } return FAILURE; } /* }}} */ void zend_compile_declare(zend_ast *ast) /* {{{ */ { zend_ast_list *declares = zend_ast_get_list(ast->child[0]); zend_ast *stmt_ast = ast->child[1]; zend_declarables orig_declarables = FC(declarables); uint32_t i; for (i = 0; i < declares->children; ++i) { zend_ast *declare_ast = declares->child[i]; zend_ast *name_ast = declare_ast->child[0]; zend_ast *value_ast = declare_ast->child[1]; zend_string *name = zend_ast_get_str(name_ast); if (value_ast->kind != ZEND_AST_ZVAL) { zend_error_noreturn(E_COMPILE_ERROR, "declare(%s) value must be a literal", ZSTR_VAL(name)); } if (zend_string_equals_literal_ci(name, "ticks")) { zval value_zv; zend_const_expr_to_zval(&value_zv, value_ast); FC(declarables).ticks = zval_get_long(&value_zv); zval_ptr_dtor_nogc(&value_zv); } else if (zend_string_equals_literal_ci(name, "encoding")) { if (FAILURE == zend_declare_is_first_statement(ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Encoding declaration pragma must be " "the very first statement in the script"); } } else if (zend_string_equals_literal_ci(name, "strict_types")) { zval value_zv; if (FAILURE == zend_declare_is_first_statement(ast)) { zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must be " "the very first statement in the script"); } if (ast->child[1] != NULL) { zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must not " "use block mode"); } zend_const_expr_to_zval(&value_zv, value_ast); if (Z_TYPE(value_zv) != IS_LONG || (Z_LVAL(value_zv) != 0 && Z_LVAL(value_zv) != 1)) { zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must have 0 or 1 as its value"); } if (Z_LVAL(value_zv) == 1) { CG(active_op_array)->fn_flags |= ZEND_ACC_STRICT_TYPES; } } else { zend_error(E_COMPILE_WARNING, "Unsupported declare '%s'", ZSTR_VAL(name)); } } if (stmt_ast) { zend_compile_stmt(stmt_ast); FC(declarables) = orig_declarables; } } /* }}} */ void zend_compile_stmt_list(zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; for (i = 0; i < list->children; ++i) { zend_compile_stmt(list->child[i]); } } /* }}} */ ZEND_API void zend_set_function_arg_flags(zend_function *func) /* {{{ */ { uint32_t i, n; func->common.arg_flags[0] = 0; func->common.arg_flags[1] = 0; func->common.arg_flags[2] = 0; if (func->common.arg_info) { n = MIN(func->common.num_args, MAX_ARG_FLAG_NUM); i = 0; while (i < n) { ZEND_SET_ARG_FLAG(func, i + 1, func->common.arg_info[i].pass_by_reference); i++; } if (UNEXPECTED(func->common.fn_flags & ZEND_ACC_VARIADIC && func->common.arg_info[i].pass_by_reference)) { uint32_t pass_by_reference = func->common.arg_info[i].pass_by_reference; while (i < MAX_ARG_FLAG_NUM) { ZEND_SET_ARG_FLAG(func, i + 1, pass_by_reference); i++; } } } } /* }}} */ static zend_type zend_compile_typename(zend_ast *ast, zend_bool force_allow_null) /* {{{ */ { zend_bool allow_null = force_allow_null; zend_ast_attr orig_ast_attr = ast->attr; zend_type type; if (ast->attr & ZEND_TYPE_NULLABLE) { allow_null = 1; ast->attr &= ~ZEND_TYPE_NULLABLE; } if (ast->kind == ZEND_AST_TYPE) { return ZEND_TYPE_ENCODE(ast->attr, allow_null); } else { zend_string *class_name = zend_ast_get_str(ast); zend_uchar type_code = zend_lookup_builtin_type_by_name(class_name); if (type_code != 0) { if ((ast->attr & ZEND_NAME_NOT_FQ) != ZEND_NAME_NOT_FQ) { zend_error_noreturn(E_COMPILE_ERROR, "Type declaration '%s' must be unqualified", ZSTR_VAL(zend_string_tolower(class_name))); } type = ZEND_TYPE_ENCODE(type_code, allow_null); } else { uint32_t fetch_type = zend_get_class_fetch_type_ast(ast); if (fetch_type == ZEND_FETCH_CLASS_DEFAULT) { class_name = zend_resolve_class_name_ast(ast); zend_assert_valid_class_name(class_name); } else { zend_ensure_valid_class_fetch_type(fetch_type); zend_string_addref(class_name); } type = ZEND_TYPE_ENCODE_CLASS(class_name, allow_null); } } ast->attr = orig_ast_attr; return type; } /* }}} */ void zend_compile_params(zend_ast *ast, zend_ast *return_type_ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; zend_op_array *op_array = CG(active_op_array); zend_arg_info *arg_infos; if (return_type_ast) { /* Use op_array->arg_info[-1] for return type */ arg_infos = safe_emalloc(sizeof(zend_arg_info), list->children + 1, 0); arg_infos->name = NULL; arg_infos->pass_by_reference = (op_array->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0; arg_infos->is_variadic = 0; arg_infos->type = zend_compile_typename(return_type_ast, 0); if (ZEND_TYPE_CODE(arg_infos->type) == IS_VOID && ZEND_TYPE_ALLOW_NULL(arg_infos->type)) { zend_error_noreturn(E_COMPILE_ERROR, "Void type cannot be nullable"); } arg_infos++; op_array->fn_flags |= ZEND_ACC_HAS_RETURN_TYPE; } else { if (list->children == 0) { return; } arg_infos = safe_emalloc(sizeof(zend_arg_info), list->children, 0); } for (i = 0; i < list->children; ++i) { zend_ast *param_ast = list->child[i]; zend_ast *type_ast = param_ast->child[0]; zend_ast *var_ast = param_ast->child[1]; zend_ast *default_ast = param_ast->child[2]; zend_string *name = zval_make_interned_string(zend_ast_get_zval(var_ast)); zend_bool is_ref = (param_ast->attr & ZEND_PARAM_REF) != 0; zend_bool is_variadic = (param_ast->attr & ZEND_PARAM_VARIADIC) != 0; znode var_node, default_node; zend_uchar opcode; zend_op *opline; zend_arg_info *arg_info; if (zend_is_auto_global(name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign auto-global variable %s", ZSTR_VAL(name)); } var_node.op_type = IS_CV; var_node.u.op.var = lookup_cv(name); if (EX_VAR_TO_NUM(var_node.u.op.var) != i) { zend_error_noreturn(E_COMPILE_ERROR, "Redefinition of parameter $%s", ZSTR_VAL(name)); } else if (zend_string_equals_literal(name, "this")) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as parameter"); } if (op_array->fn_flags & ZEND_ACC_VARIADIC) { zend_error_noreturn(E_COMPILE_ERROR, "Only the last parameter can be variadic"); } if (is_variadic) { opcode = ZEND_RECV_VARIADIC; default_node.op_type = IS_UNUSED; op_array->fn_flags |= ZEND_ACC_VARIADIC; if (default_ast) { zend_error_noreturn(E_COMPILE_ERROR, "Variadic parameter cannot have a default value"); } } else if (default_ast) { /* we cannot substitute constants here or it will break ReflectionParameter::getDefaultValueConstantName() and ReflectionParameter::isDefaultValueConstant() */ uint32_t cops = CG(compiler_options); CG(compiler_options) |= ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION | ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION; opcode = ZEND_RECV_INIT; default_node.op_type = IS_CONST; zend_const_expr_to_zval(&default_node.u.constant, default_ast); CG(compiler_options) = cops; } else { opcode = ZEND_RECV; default_node.op_type = IS_UNUSED; op_array->required_num_args = i + 1; } arg_info = &arg_infos[i]; arg_info->name = zend_string_copy(name); arg_info->pass_by_reference = is_ref; arg_info->is_variadic = is_variadic; /* TODO: Keep compatibility, but may be better reset "allow_null" ??? */ arg_info->type = ZEND_TYPE_ENCODE(0, 1); if (type_ast) { zend_bool has_null_default = default_ast && (Z_TYPE(default_node.u.constant) == IS_NULL || (Z_TYPE(default_node.u.constant) == IS_CONSTANT_AST && Z_ASTVAL(default_node.u.constant)->kind == ZEND_AST_CONSTANT && strcasecmp(ZSTR_VAL(zend_ast_get_constant_name(Z_ASTVAL(default_node.u.constant))), "NULL") == 0)); op_array->fn_flags |= ZEND_ACC_HAS_TYPE_HINTS; arg_info->type = zend_compile_typename(type_ast, has_null_default); if (ZEND_TYPE_CODE(arg_info->type) == IS_VOID) { zend_error_noreturn(E_COMPILE_ERROR, "void cannot be used as a parameter type"); } if (type_ast->kind == ZEND_AST_TYPE) { if (ZEND_TYPE_CODE(arg_info->type) == IS_ARRAY) { if (default_ast && !has_null_default && Z_TYPE(default_node.u.constant) != IS_ARRAY && Z_TYPE(default_node.u.constant) != IS_CONSTANT_AST ) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with array type can only be an array or NULL"); } } else if (ZEND_TYPE_CODE(arg_info->type) == IS_CALLABLE && default_ast) { if (!has_null_default && Z_TYPE(default_node.u.constant) != IS_CONSTANT_AST) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with callable type can only be NULL"); } } } else { if (default_ast && !has_null_default && Z_TYPE(default_node.u.constant) != IS_CONSTANT_AST) { if (ZEND_TYPE_IS_CLASS(arg_info->type)) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with a class type can only be NULL"); } else switch (ZEND_TYPE_CODE(arg_info->type)) { case IS_DOUBLE: if (Z_TYPE(default_node.u.constant) != IS_DOUBLE && Z_TYPE(default_node.u.constant) != IS_LONG) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with a float type can only be float, integer, or NULL"); } convert_to_double(&default_node.u.constant); break; case IS_ITERABLE: if (Z_TYPE(default_node.u.constant) != IS_ARRAY) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with iterable type can only be an array or NULL"); } break; case IS_OBJECT: zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with an object type can only be NULL"); break; default: if (!ZEND_SAME_FAKE_TYPE(ZEND_TYPE_CODE(arg_info->type), Z_TYPE(default_node.u.constant))) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters " "with a %s type can only be %s or NULL", zend_get_type_by_const(ZEND_TYPE_CODE(arg_info->type)), zend_get_type_by_const(ZEND_TYPE_CODE(arg_info->type))); } break; } } } } opline = zend_emit_op(NULL, opcode, NULL, &default_node); SET_NODE(opline->result, &var_node); opline->op1.num = i + 1; if (type_ast) { /* Allocate cache slot to speed-up run-time class resolution */ if (opline->opcode == ZEND_RECV_INIT) { if (ZEND_TYPE_IS_CLASS(arg_info->type)) { opline->extended_value = zend_alloc_cache_slot(); } } else { if (ZEND_TYPE_IS_CLASS(arg_info->type)) { opline->op2.num = op_array->cache_size; op_array->cache_size += sizeof(void*); } else { opline->op2.num = -1; } } } else { if (opline->opcode != ZEND_RECV_INIT) { opline->op2.num = -1; } } } /* These are assigned at the end to avoid uninitialized memory in case of an error */ op_array->num_args = list->children; op_array->arg_info = arg_infos; /* Don't count the variadic argument */ if (op_array->fn_flags & ZEND_ACC_VARIADIC) { op_array->num_args--; } zend_set_function_arg_flags((zend_function*)op_array); } /* }}} */ static void zend_compile_closure_binding(znode *closure, zend_op_array *op_array, zend_ast *uses_ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(uses_ast); uint32_t i; if (!list->children) { return; } if (!op_array->static_variables) { op_array->static_variables = zend_new_array(8); } for (i = 0; i < list->children; ++i) { zend_ast *var_name_ast = list->child[i]; zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_name_ast)); uint32_t mode = var_name_ast->attr; zend_op *opline; zval *value; if (zend_string_equals_literal(var_name, "this")) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as lexical variable"); } if (zend_is_auto_global(var_name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use auto-global as lexical variable"); } value = zend_hash_add(op_array->static_variables, var_name, &EG(uninitialized_zval)); if (!value) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use variable $%s twice", ZSTR_VAL(var_name)); } CG(zend_lineno) = zend_ast_get_lineno(var_name_ast); opline = zend_emit_op(NULL, ZEND_BIND_LEXICAL, closure, NULL); opline->op2_type = IS_CV; opline->op2.var = lookup_cv(var_name); opline->extended_value = (uint32_t)((char*)value - (char*)op_array->static_variables->arData) | mode; } } /* }}} */ typedef struct { HashTable uses; zend_bool varvars_used; } closure_info; static void find_implicit_binds_recursively(closure_info *info, zend_ast *ast) { if (!ast) { return; } if (ast->kind == ZEND_AST_VAR) { zend_ast *name_ast = ast->child[0]; if (name_ast->kind == ZEND_AST_ZVAL && Z_TYPE_P(zend_ast_get_zval(name_ast)) == IS_STRING) { zend_string *name = zend_ast_get_str(name_ast); if (zend_is_auto_global(name)) { /* These is no need to explicitly import auto-globals. */ return; } if (zend_string_equals_literal(name, "this")) { /* $this does not need to be explicitly imported. */ return; } zend_hash_add_empty_element(&info->uses, name); } else { info->varvars_used = 1; find_implicit_binds_recursively(info, name_ast); } } else if (zend_ast_is_list(ast)) { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; for (i = 0; i < list->children; i++) { find_implicit_binds_recursively(info, list->child[i]); } } else if (ast->kind == ZEND_AST_CLOSURE) { /* For normal closures add the use() list. */ zend_ast_decl *closure_ast = (zend_ast_decl *) ast; zend_ast *uses_ast = closure_ast->child[1]; if (uses_ast) { zend_ast_list *uses_list = zend_ast_get_list(uses_ast); uint32_t i; for (i = 0; i < uses_list->children; i++) { zend_hash_add_empty_element(&info->uses, zend_ast_get_str(uses_list->child[i])); } } } else if (ast->kind == ZEND_AST_ARROW_FUNC) { /* For arrow functions recursively check the expression. */ zend_ast_decl *closure_ast = (zend_ast_decl *) ast; find_implicit_binds_recursively(info, closure_ast->child[2]); } else if (!zend_ast_is_special(ast)) { uint32_t i, children = zend_ast_get_num_children(ast); for (i = 0; i < children; i++) { find_implicit_binds_recursively(info, ast->child[i]); } } } static void find_implicit_binds(closure_info *info, zend_ast *params_ast, zend_ast *stmt_ast) { zend_ast_list *param_list = zend_ast_get_list(params_ast); uint32_t i; zend_hash_init(&info->uses, param_list->children, NULL, NULL, 0); find_implicit_binds_recursively(info, stmt_ast); /* Remove variables that are parameters */ for (i = 0; i < param_list->children; i++) { zend_ast *param_ast = param_list->child[i]; zend_hash_del(&info->uses, zend_ast_get_str(param_ast->child[1])); } } static void compile_implicit_lexical_binds( closure_info *info, znode *closure, zend_op_array *op_array) { zend_string *var_name; zend_op *opline; /* TODO We might want to use a special binding mode if varvars_used is set. */ if (zend_hash_num_elements(&info->uses) == 0) { return; } if (!op_array->static_variables) { op_array->static_variables = zend_new_array(8); } ZEND_HASH_FOREACH_STR_KEY(&info->uses, var_name) zval *value = zend_hash_add( op_array->static_variables, var_name, &EG(uninitialized_zval)); uint32_t offset = (uint32_t)((char*)value - (char*)op_array->static_variables->arData); opline = zend_emit_op(NULL, ZEND_BIND_LEXICAL, closure, NULL); opline->op2_type = IS_CV; opline->op2.var = lookup_cv(var_name); opline->extended_value = offset | ZEND_BIND_IMPLICIT; ZEND_HASH_FOREACH_END(); } static void zend_compile_closure_uses(zend_ast *ast) /* {{{ */ { zend_op_array *op_array = CG(active_op_array); zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; for (i = 0; i < list->children; ++i) { zend_ast *var_ast = list->child[i]; zend_string *var_name = zend_ast_get_str(var_ast); zval zv; ZVAL_NULL(&zv); { int i; for (i = 0; i < op_array->last_var; i++) { if (zend_string_equals(op_array->vars[i], var_name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use lexical variable $%s as a parameter name", ZSTR_VAL(var_name)); } } } CG(zend_lineno) = zend_ast_get_lineno(var_ast); zend_compile_static_var_common(var_name, &zv, var_ast->attr ? ZEND_BIND_REF : 0); } } /* }}} */ static void zend_compile_implicit_closure_uses(closure_info *info) { zend_string *var_name; ZEND_HASH_FOREACH_STR_KEY(&info->uses, var_name) zval zv; ZVAL_NULL(&zv); zend_compile_static_var_common(var_name, &zv, ZEND_BIND_IMPLICIT); ZEND_HASH_FOREACH_END(); } void zend_begin_method_decl(zend_op_array *op_array, zend_string *name, zend_bool has_body) /* {{{ */ { zend_class_entry *ce = CG(active_class_entry); zend_bool in_interface = (ce->ce_flags & ZEND_ACC_INTERFACE) != 0; zend_bool in_trait = (ce->ce_flags & ZEND_ACC_TRAIT) != 0; zend_bool is_public = (op_array->fn_flags & ZEND_ACC_PUBLIC) != 0; zend_bool is_static = (op_array->fn_flags & ZEND_ACC_STATIC) != 0; zend_string *lcname; if (in_interface) { if (!is_public || (op_array->fn_flags & (ZEND_ACC_FINAL|ZEND_ACC_ABSTRACT))) { zend_error_noreturn(E_COMPILE_ERROR, "Access type for interface method " "%s::%s() must be omitted", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } op_array->fn_flags |= ZEND_ACC_ABSTRACT; } if (op_array->fn_flags & ZEND_ACC_ABSTRACT) { if (op_array->fn_flags & ZEND_ACC_PRIVATE) { zend_error_noreturn(E_COMPILE_ERROR, "%s function %s::%s() cannot be declared private", in_interface ? "Interface" : "Abstract", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } if (has_body) { zend_error_noreturn(E_COMPILE_ERROR, "%s function %s::%s() cannot contain body", in_interface ? "Interface" : "Abstract", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } ce->ce_flags |= ZEND_ACC_IMPLICIT_ABSTRACT_CLASS; } else if (!has_body) { zend_error_noreturn(E_COMPILE_ERROR, "Non-abstract method %s::%s() must contain body", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } op_array->scope = ce; op_array->function_name = zend_string_copy(name); lcname = zend_string_tolower(name); lcname = zend_new_interned_string(lcname); if (zend_hash_add_ptr(&ce->function_table, lcname, op_array) == NULL) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::%s()", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } if (in_interface) { if (ZSTR_VAL(lcname)[0] != '_' || ZSTR_VAL(lcname)[1] != '_') { /* pass */ } else if (zend_string_equals_literal(lcname, ZEND_CALL_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __call() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_CALLSTATIC_FUNC_NAME)) { if (!is_public || !is_static) { zend_error(E_WARNING, "The magic method __callStatic() must have " "public visibility and be static"); } } else if (zend_string_equals_literal(lcname, ZEND_GET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __get() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_SET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __set() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_UNSET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __unset() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_ISSET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __isset() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_TOSTRING_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __toString() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_INVOKE_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __invoke() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_DEBUGINFO_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __debugInfo() must have " "public visibility and cannot be static"); } } } else { if (!in_trait && zend_string_equals_ci(lcname, ce->name)) { if (!ce->constructor) { ce->constructor = (zend_function *) op_array; } } else if (zend_string_equals_literal(lcname, "serialize")) { ce->serialize_func = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, "unserialize")) { ce->unserialize_func = (zend_function *) op_array; } else if (ZSTR_VAL(lcname)[0] != '_' || ZSTR_VAL(lcname)[1] != '_') { if (!is_static) { op_array->fn_flags |= ZEND_ACC_ALLOW_STATIC; } } else if (zend_string_equals_literal(lcname, ZEND_CONSTRUCTOR_FUNC_NAME)) { ce->constructor = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, ZEND_DESTRUCTOR_FUNC_NAME)) { ce->destructor = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, ZEND_CLONE_FUNC_NAME)) { ce->clone = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, ZEND_CALL_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __call() must have " "public visibility and cannot be static"); } ce->__call = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, ZEND_CALLSTATIC_FUNC_NAME)) { if (!is_public || !is_static) { zend_error(E_WARNING, "The magic method __callStatic() must have " "public visibility and be static"); } ce->__callstatic = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, ZEND_GET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __get() must have " "public visibility and cannot be static"); } ce->__get = (zend_function *) op_array; ce->ce_flags |= ZEND_ACC_USE_GUARDS; } else if (zend_string_equals_literal(lcname, ZEND_SET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __set() must have " "public visibility and cannot be static"); } ce->__set = (zend_function *) op_array; ce->ce_flags |= ZEND_ACC_USE_GUARDS; } else if (zend_string_equals_literal(lcname, ZEND_UNSET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __unset() must have " "public visibility and cannot be static"); } ce->__unset = (zend_function *) op_array; ce->ce_flags |= ZEND_ACC_USE_GUARDS; } else if (zend_string_equals_literal(lcname, ZEND_ISSET_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __isset() must have " "public visibility and cannot be static"); } ce->__isset = (zend_function *) op_array; ce->ce_flags |= ZEND_ACC_USE_GUARDS; } else if (zend_string_equals_literal(lcname, ZEND_TOSTRING_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __toString() must have " "public visibility and cannot be static"); } ce->__tostring = (zend_function *) op_array; } else if (zend_string_equals_literal(lcname, ZEND_INVOKE_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __invoke() must have " "public visibility and cannot be static"); } } else if (zend_string_equals_literal(lcname, ZEND_DEBUGINFO_FUNC_NAME)) { if (!is_public || is_static) { zend_error(E_WARNING, "The magic method __debugInfo() must have " "public visibility and cannot be static"); } ce->__debugInfo = (zend_function *) op_array; } else if (!is_static) { op_array->fn_flags |= ZEND_ACC_ALLOW_STATIC; } } zend_string_release_ex(lcname, 0); } /* }}} */ static void zend_begin_func_decl(znode *result, zend_op_array *op_array, zend_ast_decl *decl, zend_bool toplevel) /* {{{ */ { zend_ast *params_ast = decl->child[0]; zend_string *unqualified_name, *name, *lcname, *key; zend_op *opline; unqualified_name = decl->name; op_array->function_name = name = zend_prefix_with_ns(unqualified_name); lcname = zend_string_tolower(name); if (FC(imports_function)) { zend_string *import_name = zend_hash_find_ptr_lc( FC(imports_function), ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name)); if (import_name && !zend_string_equals_ci(lcname, import_name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare function %s " "because the name is already in use", ZSTR_VAL(name)); } } if (zend_string_equals_literal(lcname, ZEND_AUTOLOAD_FUNC_NAME)) { if (zend_ast_get_list(params_ast)->children != 1) { zend_error_noreturn(E_COMPILE_ERROR, "%s() must take exactly 1 argument", ZEND_AUTOLOAD_FUNC_NAME); } zend_error(E_DEPRECATED, "__autoload() is deprecated, use spl_autoload_register() instead"); } if (zend_string_equals_literal_ci(unqualified_name, "assert")) { zend_error(E_DEPRECATED, "Defining a custom assert() function is deprecated, " "as the function has special semantics"); } zend_register_seen_symbol(lcname, ZEND_SYMBOL_FUNCTION); if (toplevel) { if (UNEXPECTED(zend_hash_add_ptr(CG(function_table), lcname, op_array) == NULL)) { do_bind_function_error(lcname, op_array, 1); } zend_string_release_ex(lcname, 0); return; } key = zend_build_runtime_definition_key(lcname, decl->start_lineno); if (!zend_hash_add_ptr(CG(function_table), key, op_array)) { zend_error_noreturn(E_ERROR, "Runtime definition key collision for function %s. This is a bug", ZSTR_VAL(name)); } if (op_array->fn_flags & ZEND_ACC_CLOSURE) { opline = zend_emit_op_tmp(result, ZEND_DECLARE_LAMBDA_FUNCTION, NULL, NULL); opline->extended_value = zend_alloc_cache_slot(); opline->op1_type = IS_CONST; LITERAL_STR(opline->op1, key); } else { opline = get_next_op(); opline->opcode = ZEND_DECLARE_FUNCTION; opline->op1_type = IS_CONST; LITERAL_STR(opline->op1, zend_string_copy(lcname)); /* RTD key is placed after lcname literal in op1 */ zend_add_literal_string(&key); } zend_string_release_ex(lcname, 0); } /* }}} */ void zend_compile_func_decl(znode *result, zend_ast *ast, zend_bool toplevel) /* {{{ */ { zend_ast_decl *decl = (zend_ast_decl *) ast; zend_ast *params_ast = decl->child[0]; zend_ast *uses_ast = decl->child[1]; zend_ast *stmt_ast = decl->child[2]; zend_ast *return_type_ast = decl->child[3]; zend_bool is_method = decl->kind == ZEND_AST_METHOD; zend_class_entry *orig_class_entry = CG(active_class_entry); zend_op_array *orig_op_array = CG(active_op_array); zend_op_array *op_array = zend_arena_alloc(&CG(arena), sizeof(zend_op_array)); zend_oparray_context orig_oparray_context; closure_info info; memset(&info, 0, sizeof(closure_info)); init_op_array(op_array, ZEND_USER_FUNCTION, INITIAL_OP_ARRAY_SIZE); if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) { op_array->fn_flags |= ZEND_ACC_PRELOADED; ZEND_MAP_PTR_NEW(op_array->run_time_cache); ZEND_MAP_PTR_NEW(op_array->static_variables_ptr); } else { ZEND_MAP_PTR_INIT(op_array->run_time_cache, zend_arena_alloc(&CG(arena), sizeof(void*))); ZEND_MAP_PTR_SET(op_array->run_time_cache, NULL); } op_array->fn_flags |= (orig_op_array->fn_flags & ZEND_ACC_STRICT_TYPES); op_array->fn_flags |= decl->flags; op_array->line_start = decl->start_lineno; op_array->line_end = decl->end_lineno; if (decl->doc_comment) { op_array->doc_comment = zend_string_copy(decl->doc_comment); } if (decl->kind == ZEND_AST_CLOSURE || decl->kind == ZEND_AST_ARROW_FUNC) { op_array->fn_flags |= ZEND_ACC_CLOSURE; } if (is_method) { zend_bool has_body = stmt_ast != NULL; zend_begin_method_decl(op_array, decl->name, has_body); } else { zend_begin_func_decl(result, op_array, decl, toplevel); if (decl->kind == ZEND_AST_ARROW_FUNC) { find_implicit_binds(&info, params_ast, stmt_ast); compile_implicit_lexical_binds(&info, result, op_array); } else if (uses_ast) { zend_compile_closure_binding(result, op_array, uses_ast); } } CG(active_op_array) = op_array; /* Do not leak the class scope into free standing functions, even if they are dynamically * defined inside a class method. This is necessary for correct handling of magic constants. * For example __CLASS__ should always be "" inside a free standing function. */ if (decl->kind == ZEND_AST_FUNC_DECL) { CG(active_class_entry) = NULL; } if (toplevel) { op_array->fn_flags |= ZEND_ACC_TOP_LEVEL; } zend_oparray_context_begin(&orig_oparray_context); if (CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT) { zend_op *opline_ext = zend_emit_op(NULL, ZEND_EXT_NOP, NULL, NULL); opline_ext->lineno = decl->start_lineno; } { /* Push a separator to the loop variable stack */ zend_loop_var dummy_var; dummy_var.opcode = ZEND_RETURN; zend_stack_push(&CG(loop_var_stack), (void *) &dummy_var); } zend_compile_params(params_ast, return_type_ast); if (CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) { zend_mark_function_as_generator(); zend_emit_op(NULL, ZEND_GENERATOR_CREATE, NULL, NULL); } if (decl->kind == ZEND_AST_ARROW_FUNC) { zend_compile_implicit_closure_uses(&info); zend_hash_destroy(&info.uses); } else if (uses_ast) { zend_compile_closure_uses(uses_ast); } zend_compile_stmt(stmt_ast); if (is_method) { zend_check_magic_method_implementation( CG(active_class_entry), (zend_function *) op_array, E_COMPILE_ERROR); } /* put the implicit return on the really last line */ CG(zend_lineno) = decl->end_lineno; zend_do_extended_stmt(); zend_emit_final_return(0); pass_two(CG(active_op_array)); zend_oparray_context_end(&orig_oparray_context); /* Pop the loop variable stack separator */ zend_stack_del_top(&CG(loop_var_stack)); CG(active_op_array) = orig_op_array; CG(active_class_entry) = orig_class_entry; } /* }}} */ void zend_compile_prop_decl(zend_ast *ast, zend_ast *type_ast, uint32_t flags) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); zend_class_entry *ce = CG(active_class_entry); uint32_t i, children = list->children; if (ce->ce_flags & ZEND_ACC_INTERFACE) { zend_error_noreturn(E_COMPILE_ERROR, "Interfaces may not include member variables"); } if (flags & ZEND_ACC_ABSTRACT) { zend_error_noreturn(E_COMPILE_ERROR, "Properties cannot be declared abstract"); } for (i = 0; i < children; ++i) { zend_ast *prop_ast = list->child[i]; zend_ast *name_ast = prop_ast->child[0]; zend_ast *value_ast = prop_ast->child[1]; zend_ast *doc_comment_ast = prop_ast->child[2]; zend_string *name = zval_make_interned_string(zend_ast_get_zval(name_ast)); zend_string *doc_comment = NULL; zval value_zv; zend_type type = 0; if (type_ast) { type = zend_compile_typename(type_ast, 0); if (ZEND_TYPE_CODE(type) == IS_VOID || ZEND_TYPE_CODE(type) == IS_CALLABLE) { zend_error_noreturn(E_COMPILE_ERROR, "Property %s::$%s cannot have type %s", ZSTR_VAL(ce->name), ZSTR_VAL(name), zend_get_type_by_const(ZEND_TYPE_CODE(type))); } } /* Doc comment has been appended as last element in ZEND_AST_PROP_ELEM ast */ if (doc_comment_ast) { doc_comment = zend_string_copy(zend_ast_get_str(doc_comment_ast)); } if (flags & ZEND_ACC_FINAL) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare property %s::$%s final, " "the final modifier is allowed only for methods and classes", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } if (zend_hash_exists(&ce->properties_info, name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(name)); } if (value_ast) { zend_const_expr_to_zval(&value_zv, value_ast); if (ZEND_TYPE_IS_SET(type) && !Z_CONSTANT(value_zv)) { if (Z_TYPE(value_zv) == IS_NULL) { if (!ZEND_TYPE_ALLOW_NULL(type)) { const char *name = ZEND_TYPE_IS_CLASS(type) ? ZSTR_VAL(ZEND_TYPE_NAME(type)) : zend_get_type_by_const(ZEND_TYPE_CODE(type)); zend_error_noreturn(E_COMPILE_ERROR, "Default value for property of type %s may not be null. " "Use the nullable type ?%s to allow null default value", name, name); } } else if (ZEND_TYPE_IS_CLASS(type)) { zend_error_noreturn(E_COMPILE_ERROR, "Property of type %s may not have default value", ZSTR_VAL(ZEND_TYPE_NAME(type))); } else if (ZEND_TYPE_CODE(type) == IS_ARRAY || ZEND_TYPE_CODE(type) == IS_ITERABLE) { if (Z_TYPE(value_zv) != IS_ARRAY) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for property of type %s can only be an array", zend_get_type_by_const(ZEND_TYPE_CODE(type))); } } else if (ZEND_TYPE_CODE(type) == IS_DOUBLE) { if (Z_TYPE(value_zv) != IS_DOUBLE && Z_TYPE(value_zv) != IS_LONG) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for property of type float can only be float or int"); } convert_to_double(&value_zv); } else if (!ZEND_SAME_FAKE_TYPE(ZEND_TYPE_CODE(type), Z_TYPE(value_zv))) { zend_error_noreturn(E_COMPILE_ERROR, "Default value for property of type %s can only be %s", zend_get_type_by_const(ZEND_TYPE_CODE(type)), zend_get_type_by_const(ZEND_TYPE_CODE(type))); } } } else if (!ZEND_TYPE_IS_SET(type)) { ZVAL_NULL(&value_zv); } else { ZVAL_UNDEF(&value_zv); } zend_declare_typed_property(ce, name, &value_zv, flags, doc_comment, type); } } /* }}} */ void zend_compile_prop_group(zend_ast *list) /* {{{ */ { zend_ast *type_ast = list->child[0]; zend_ast *prop_ast = list->child[1]; zend_compile_prop_decl(prop_ast, type_ast, list->attr); } /* }}} */ void zend_compile_class_const_decl(zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); zend_class_entry *ce = CG(active_class_entry); uint32_t i; if ((ce->ce_flags & ZEND_ACC_TRAIT) != 0) { zend_error_noreturn(E_COMPILE_ERROR, "Traits cannot have constants"); return; } for (i = 0; i < list->children; ++i) { zend_ast *const_ast = list->child[i]; zend_ast *name_ast = const_ast->child[0]; zend_ast *value_ast = const_ast->child[1]; zend_ast *doc_comment_ast = const_ast->child[2]; zend_string *name = zval_make_interned_string(zend_ast_get_zval(name_ast)); zend_string *doc_comment = doc_comment_ast ? zend_string_copy(zend_ast_get_str(doc_comment_ast)) : NULL; zval value_zv; if (UNEXPECTED(ast->attr & (ZEND_ACC_STATIC|ZEND_ACC_ABSTRACT|ZEND_ACC_FINAL))) { if (ast->attr & ZEND_ACC_STATIC) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'static' as constant modifier"); } else if (ast->attr & ZEND_ACC_ABSTRACT) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'abstract' as constant modifier"); } else if (ast->attr & ZEND_ACC_FINAL) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'final' as constant modifier"); } } zend_const_expr_to_zval(&value_zv, value_ast); zend_declare_class_constant_ex(ce, name, &value_zv, ast->attr, doc_comment); } } /* }}} */ static void zend_compile_method_ref(zend_ast *ast, zend_trait_method_reference *method_ref) /* {{{ */ { zend_ast *class_ast = ast->child[0]; zend_ast *method_ast = ast->child[1]; method_ref->method_name = zend_string_copy(zend_ast_get_str(method_ast)); if (class_ast) { method_ref->class_name = zend_resolve_class_name_ast(class_ast); } else { method_ref->class_name = NULL; } } /* }}} */ static void zend_compile_trait_precedence(zend_ast *ast) /* {{{ */ { zend_ast *method_ref_ast = ast->child[0]; zend_ast *insteadof_ast = ast->child[1]; zend_ast_list *insteadof_list = zend_ast_get_list(insteadof_ast); uint32_t i; zend_trait_precedence *precedence = emalloc(sizeof(zend_trait_precedence) + (insteadof_list->children - 1) * sizeof(zend_string*)); zend_compile_method_ref(method_ref_ast, &precedence->trait_method); precedence->num_excludes = insteadof_list->children; for (i = 0; i < insteadof_list->children; ++i) { zend_ast *name_ast = insteadof_list->child[i]; precedence->exclude_class_names[i] = zend_resolve_class_name_ast(name_ast); } zend_add_to_list(&CG(active_class_entry)->trait_precedences, precedence); } /* }}} */ static void zend_compile_trait_alias(zend_ast *ast) /* {{{ */ { zend_ast *method_ref_ast = ast->child[0]; zend_ast *alias_ast = ast->child[1]; uint32_t modifiers = ast->attr; zend_trait_alias *alias; if (modifiers == ZEND_ACC_STATIC) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'static' as method modifier"); } else if (modifiers == ZEND_ACC_ABSTRACT) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'abstract' as method modifier"); } else if (modifiers == ZEND_ACC_FINAL) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'final' as method modifier"); } alias = emalloc(sizeof(zend_trait_alias)); zend_compile_method_ref(method_ref_ast, &alias->trait_method); alias->modifiers = modifiers; if (alias_ast) { alias->alias = zend_string_copy(zend_ast_get_str(alias_ast)); } else { alias->alias = NULL; } zend_add_to_list(&CG(active_class_entry)->trait_aliases, alias); } /* }}} */ void zend_compile_use_trait(zend_ast *ast) /* {{{ */ { zend_ast_list *traits = zend_ast_get_list(ast->child[0]); zend_ast_list *adaptations = ast->child[1] ? zend_ast_get_list(ast->child[1]) : NULL; zend_class_entry *ce = CG(active_class_entry); uint32_t i; ce->ce_flags |= ZEND_ACC_IMPLEMENT_TRAITS; ce->trait_names = erealloc(ce->trait_names, sizeof(zend_class_name) * (ce->num_traits + traits->children)); for (i = 0; i < traits->children; ++i) { zend_ast *trait_ast = traits->child[i]; zend_string *name = zend_ast_get_str(trait_ast); if (ce->ce_flags & ZEND_ACC_INTERFACE) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use traits inside of interfaces. " "%s is used in %s", ZSTR_VAL(name), ZSTR_VAL(ce->name)); } switch (zend_get_class_fetch_type(name)) { case ZEND_FETCH_CLASS_SELF: case ZEND_FETCH_CLASS_PARENT: case ZEND_FETCH_CLASS_STATIC: zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as trait name " "as it is reserved", ZSTR_VAL(name)); break; } ce->trait_names[ce->num_traits].name = zend_resolve_class_name_ast(trait_ast); ce->trait_names[ce->num_traits].lc_name = zend_string_tolower(ce->trait_names[ce->num_traits].name); ce->num_traits++; } if (!adaptations) { return; } for (i = 0; i < adaptations->children; ++i) { zend_ast *adaptation_ast = adaptations->child[i]; switch (adaptation_ast->kind) { case ZEND_AST_TRAIT_PRECEDENCE: zend_compile_trait_precedence(adaptation_ast); break; case ZEND_AST_TRAIT_ALIAS: zend_compile_trait_alias(adaptation_ast); break; EMPTY_SWITCH_DEFAULT_CASE() } } } /* }}} */ void zend_compile_implements(zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); zend_class_entry *ce = CG(active_class_entry); zend_class_name *interface_names; uint32_t i; interface_names = emalloc(sizeof(zend_class_name) * list->children); for (i = 0; i < list->children; ++i) { zend_ast *class_ast = list->child[i]; zend_string *name = zend_ast_get_str(class_ast); if (!zend_is_const_default_class_ref(class_ast)) { efree(interface_names); zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as interface name as it is reserved", ZSTR_VAL(name)); } interface_names[i].name = zend_resolve_class_name_ast(class_ast); interface_names[i].lc_name = zend_string_tolower(interface_names[i].name); } ce->ce_flags |= ZEND_ACC_IMPLEMENT_INTERFACES; ce->num_interfaces = list->children; ce->interface_names = interface_names; } /* }}} */ static zend_string *zend_generate_anon_class_name(uint32_t start_lineno) /* {{{ */ { zend_string *filename = CG(active_op_array)->filename; zend_string *result = zend_strpprintf(0, "class@anonymous%c%s:%" PRIu32 "$%" PRIx32, '\0', ZSTR_VAL(filename), start_lineno, CG(rtd_key_counter)++); return zend_new_interned_string(result); } /* }}} */ zend_op *zend_compile_class_decl(zend_ast *ast, zend_bool toplevel) /* {{{ */ { zend_ast_decl *decl = (zend_ast_decl *) ast; zend_ast *extends_ast = decl->child[0]; zend_ast *implements_ast = decl->child[1]; zend_ast *stmt_ast = decl->child[2]; zend_string *name, *lcname; zend_class_entry *ce = zend_arena_alloc(&CG(arena), sizeof(zend_class_entry)); zend_op *opline; zend_class_entry *original_ce = CG(active_class_entry); if (EXPECTED((decl->flags & ZEND_ACC_ANON_CLASS) == 0)) { zend_string *unqualified_name = decl->name; if (CG(active_class_entry)) { zend_error_noreturn(E_COMPILE_ERROR, "Class declarations may not be nested"); } zend_assert_valid_class_name(unqualified_name); name = zend_prefix_with_ns(unqualified_name); name = zend_new_interned_string(name); lcname = zend_string_tolower(name); if (FC(imports)) { zend_string *import_name = zend_hash_find_ptr_lc( FC(imports), ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name)); if (import_name && !zend_string_equals_ci(lcname, import_name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare class %s " "because the name is already in use", ZSTR_VAL(name)); } } zend_register_seen_symbol(lcname, ZEND_SYMBOL_CLASS); } else { name = zend_generate_anon_class_name(decl->start_lineno); lcname = zend_string_tolower(name); } lcname = zend_new_interned_string(lcname); ce->type = ZEND_USER_CLASS; ce->name = name; zend_initialize_class_data(ce, 1); if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) { ce->ce_flags |= ZEND_ACC_PRELOADED; ZEND_MAP_PTR_NEW(ce->static_members_table); } ce->ce_flags |= decl->flags; ce->info.user.filename = zend_get_compiled_filename(); ce->info.user.line_start = decl->start_lineno; ce->info.user.line_end = decl->end_lineno; if (decl->doc_comment) { ce->info.user.doc_comment = zend_string_copy(decl->doc_comment); } if (UNEXPECTED((decl->flags & ZEND_ACC_ANON_CLASS))) { /* Serialization is not supported for anonymous classes */ ce->serialize = zend_class_serialize_deny; ce->unserialize = zend_class_unserialize_deny; } if (extends_ast) { znode extends_node; zend_string *extends_name; if (!zend_is_const_default_class_ref(extends_ast)) { extends_name = zend_ast_get_str(extends_ast); zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as class name as it is reserved", ZSTR_VAL(extends_name)); } zend_compile_expr(&extends_node, extends_ast); if (extends_node.op_type != IS_CONST || Z_TYPE(extends_node.u.constant) != IS_STRING) { zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name"); } extends_name = Z_STR(extends_node.u.constant); ce->parent_name = zend_resolve_class_name(extends_name, extends_ast->kind == ZEND_AST_ZVAL ? extends_ast->attr : ZEND_NAME_FQ); zend_string_release_ex(extends_name, 0); ce->ce_flags |= ZEND_ACC_INHERITED; } CG(active_class_entry) = ce; zend_compile_stmt(stmt_ast); /* Reset lineno for final opcodes and errors */ CG(zend_lineno) = ast->lineno; if (!(ce->ce_flags & ZEND_ACC_IMPLEMENT_TRAITS)) { /* For traits this check is delayed until after trait binding */ zend_check_deprecated_constructor(ce); } if (ce->constructor) { ce->constructor->common.fn_flags |= ZEND_ACC_CTOR; if (ce->constructor->common.fn_flags & ZEND_ACC_STATIC) { zend_error_noreturn(E_COMPILE_ERROR, "Constructor %s::%s() cannot be static", ZSTR_VAL(ce->name), ZSTR_VAL(ce->constructor->common.function_name)); } if (ce->constructor->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) { zend_error_noreturn(E_COMPILE_ERROR, "Constructor %s::%s() cannot declare a return type", ZSTR_VAL(ce->name), ZSTR_VAL(ce->constructor->common.function_name)); } } if (ce->destructor) { ce->destructor->common.fn_flags |= ZEND_ACC_DTOR; if (ce->destructor->common.fn_flags & ZEND_ACC_STATIC) { zend_error_noreturn(E_COMPILE_ERROR, "Destructor %s::%s() cannot be static", ZSTR_VAL(ce->name), ZSTR_VAL(ce->destructor->common.function_name)); } else if (ce->destructor->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) { zend_error_noreturn(E_COMPILE_ERROR, "Destructor %s::%s() cannot declare a return type", ZSTR_VAL(ce->name), ZSTR_VAL(ce->destructor->common.function_name)); } } if (ce->clone) { if (ce->clone->common.fn_flags & ZEND_ACC_STATIC) { zend_error_noreturn(E_COMPILE_ERROR, "Clone method %s::%s() cannot be static", ZSTR_VAL(ce->name), ZSTR_VAL(ce->clone->common.function_name)); } else if (ce->clone->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) { zend_error_noreturn(E_COMPILE_ERROR, "Clone method %s::%s() cannot declare a return type", ZSTR_VAL(ce->name), ZSTR_VAL(ce->clone->common.function_name)); } } if (implements_ast) { zend_compile_implements(implements_ast); } if ((ce->ce_flags & (ZEND_ACC_IMPLICIT_ABSTRACT_CLASS|ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) == ZEND_ACC_IMPLICIT_ABSTRACT_CLASS) { zend_verify_abstract_class(ce); } CG(active_class_entry) = original_ce; if (toplevel) { ce->ce_flags |= ZEND_ACC_TOP_LEVEL; } if (toplevel /* We currently don't early-bind classes that implement interfaces or use traits */ && !(ce->ce_flags & (ZEND_ACC_IMPLEMENT_INTERFACES|ZEND_ACC_IMPLEMENT_TRAITS)) && !(CG(compiler_options) & ZEND_COMPILE_PRELOAD)) { if (extends_ast) { zend_class_entry *parent_ce = zend_lookup_class_ex( ce->parent_name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD); if (parent_ce && ((parent_ce->type != ZEND_INTERNAL_CLASS) || !(CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_CLASSES)) && ((parent_ce->type != ZEND_USER_CLASS) || !(CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) || (parent_ce->info.user.filename == ce->info.user.filename))) { CG(zend_lineno) = decl->end_lineno; if (zend_try_early_bind(ce, parent_ce, lcname, NULL)) { CG(zend_lineno) = ast->lineno; zend_string_release(lcname); return NULL; } CG(zend_lineno) = ast->lineno; } } else { if (EXPECTED(zend_hash_add_ptr(CG(class_table), lcname, ce) != NULL)) { zend_string_release(lcname); zend_build_properties_info_table(ce); ce->ce_flags |= ZEND_ACC_LINKED; return NULL; } } } opline = get_next_op(); if (ce->parent_name) { /* Lowercased parent name */ zend_string *lc_parent_name = zend_string_tolower(ce->parent_name); opline->op2_type = IS_CONST; LITERAL_STR(opline->op2, lc_parent_name); } opline->op1_type = IS_CONST; LITERAL_STR(opline->op1, lcname); if (decl->flags & ZEND_ACC_ANON_CLASS) { opline->opcode = ZEND_DECLARE_ANON_CLASS; opline->extended_value = zend_alloc_cache_slot(); opline->result_type = IS_VAR; opline->result.var = get_temporary_variable(); if (!zend_hash_add_ptr(CG(class_table), lcname, ce)) { zend_error_noreturn(E_ERROR, "Runtime definition key collision for %s. This is a bug", ZSTR_VAL(name)); } } else { zend_string *key = zend_build_runtime_definition_key(lcname, decl->start_lineno); /* RTD key is placed after lcname literal in op1 */ zend_add_literal_string(&key); if (!zend_hash_add_ptr(CG(class_table), key, ce)) { zend_error_noreturn(E_ERROR, "Runtime definition key collision for class %s. This is a bug", ZSTR_VAL(name)); } opline->opcode = ZEND_DECLARE_CLASS; if (extends_ast && toplevel && (CG(compiler_options) & ZEND_COMPILE_DELAYED_BINDING) /* We currently don't early-bind classes that implement interfaces or use traits */ && !(ce->ce_flags & (ZEND_ACC_IMPLEMENT_INTERFACES|ZEND_ACC_IMPLEMENT_TRAITS)) ) { CG(active_op_array)->fn_flags |= ZEND_ACC_EARLY_BINDING; opline->opcode = ZEND_DECLARE_CLASS_DELAYED; opline->extended_value = zend_alloc_cache_slot(); opline->result_type = IS_UNUSED; opline->result.opline_num = -1; } } return opline; } /* }}} */ static HashTable *zend_get_import_ht(uint32_t type) /* {{{ */ { switch (type) { case ZEND_SYMBOL_CLASS: if (!FC(imports)) { FC(imports) = emalloc(sizeof(HashTable)); zend_hash_init(FC(imports), 8, NULL, str_dtor, 0); } return FC(imports); case ZEND_SYMBOL_FUNCTION: if (!FC(imports_function)) { FC(imports_function) = emalloc(sizeof(HashTable)); zend_hash_init(FC(imports_function), 8, NULL, str_dtor, 0); } return FC(imports_function); case ZEND_SYMBOL_CONST: if (!FC(imports_const)) { FC(imports_const) = emalloc(sizeof(HashTable)); zend_hash_init(FC(imports_const), 8, NULL, str_dtor, 0); } return FC(imports_const); EMPTY_SWITCH_DEFAULT_CASE() } return NULL; } /* }}} */ static char *zend_get_use_type_str(uint32_t type) /* {{{ */ { switch (type) { case ZEND_SYMBOL_CLASS: return ""; case ZEND_SYMBOL_FUNCTION: return " function"; case ZEND_SYMBOL_CONST: return " const"; EMPTY_SWITCH_DEFAULT_CASE() } return " unknown"; } /* }}} */ static void zend_check_already_in_use(uint32_t type, zend_string *old_name, zend_string *new_name, zend_string *check_name) /* {{{ */ { if (zend_string_equals_ci(old_name, check_name)) { return; } zend_error_noreturn(E_COMPILE_ERROR, "Cannot use%s %s as %s because the name " "is already in use", zend_get_use_type_str(type), ZSTR_VAL(old_name), ZSTR_VAL(new_name)); } /* }}} */ void zend_compile_use(zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; zend_string *current_ns = FC(current_namespace); uint32_t type = ast->attr; HashTable *current_import = zend_get_import_ht(type); zend_bool case_sensitive = type == ZEND_SYMBOL_CONST; for (i = 0; i < list->children; ++i) { zend_ast *use_ast = list->child[i]; zend_ast *old_name_ast = use_ast->child[0]; zend_ast *new_name_ast = use_ast->child[1]; zend_string *old_name = zend_ast_get_str(old_name_ast); zend_string *new_name, *lookup_name; if (new_name_ast) { new_name = zend_string_copy(zend_ast_get_str(new_name_ast)); } else { const char *unqualified_name; size_t unqualified_name_len; if (zend_get_unqualified_name(old_name, &unqualified_name, &unqualified_name_len)) { /* The form "use A\B" is equivalent to "use A\B as B" */ new_name = zend_string_init(unqualified_name, unqualified_name_len, 0); } else { new_name = zend_string_copy(old_name); if (!current_ns) { if (type == T_CLASS && zend_string_equals_literal(new_name, "strict")) { zend_error_noreturn(E_COMPILE_ERROR, "You seem to be trying to use a different language..."); } zend_error(E_WARNING, "The use statement with non-compound name '%s' " "has no effect", ZSTR_VAL(new_name)); } } } if (case_sensitive) { lookup_name = zend_string_copy(new_name); } else { lookup_name = zend_string_tolower(new_name); } if (type == ZEND_SYMBOL_CLASS && zend_is_reserved_class_name(new_name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use %s as %s because '%s' " "is a special class name", ZSTR_VAL(old_name), ZSTR_VAL(new_name), ZSTR_VAL(new_name)); } if (current_ns) { zend_string *ns_name = zend_string_alloc(ZSTR_LEN(current_ns) + 1 + ZSTR_LEN(new_name), 0); zend_str_tolower_copy(ZSTR_VAL(ns_name), ZSTR_VAL(current_ns), ZSTR_LEN(current_ns)); ZSTR_VAL(ns_name)[ZSTR_LEN(current_ns)] = '\\'; memcpy(ZSTR_VAL(ns_name) + ZSTR_LEN(current_ns) + 1, ZSTR_VAL(lookup_name), ZSTR_LEN(lookup_name) + 1); if (zend_have_seen_symbol(ns_name, type)) { zend_check_already_in_use(type, old_name, new_name, ns_name); } zend_string_efree(ns_name); } else { if (zend_have_seen_symbol(lookup_name, type)) { zend_check_already_in_use(type, old_name, new_name, lookup_name); } } zend_string_addref(old_name); old_name = zend_new_interned_string(old_name); if (!zend_hash_add_ptr(current_import, lookup_name, old_name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use%s %s as %s because the name " "is already in use", zend_get_use_type_str(type), ZSTR_VAL(old_name), ZSTR_VAL(new_name)); } zend_string_release_ex(lookup_name, 0); zend_string_release_ex(new_name, 0); } } /* }}} */ void zend_compile_group_use(zend_ast *ast) /* {{{ */ { uint32_t i; zend_string *ns = zend_ast_get_str(ast->child[0]); zend_ast_list *list = zend_ast_get_list(ast->child[1]); for (i = 0; i < list->children; i++) { zend_ast *inline_use, *use = list->child[i]; zval *name_zval = zend_ast_get_zval(use->child[0]); zend_string *name = Z_STR_P(name_zval); zend_string *compound_ns = zend_concat_names(ZSTR_VAL(ns), ZSTR_LEN(ns), ZSTR_VAL(name), ZSTR_LEN(name)); zend_string_release_ex(name, 0); ZVAL_STR(name_zval, compound_ns); inline_use = zend_ast_create_list(1, ZEND_AST_USE, use); inline_use->attr = ast->attr ? ast->attr : use->attr; zend_compile_use(inline_use); } } /* }}} */ void zend_compile_const_decl(zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; for (i = 0; i < list->children; ++i) { zend_ast *const_ast = list->child[i]; zend_ast *name_ast = const_ast->child[0]; zend_ast *value_ast = const_ast->child[1]; zend_string *unqualified_name = zend_ast_get_str(name_ast); zend_string *name; znode name_node, value_node; zval *value_zv = &value_node.u.constant; value_node.op_type = IS_CONST; zend_const_expr_to_zval(value_zv, value_ast); if (zend_lookup_reserved_const(ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name))) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare constant '%s'", ZSTR_VAL(unqualified_name)); } name = zend_prefix_with_ns(unqualified_name); name = zend_new_interned_string(name); if (FC(imports_const)) { zend_string *import_name = zend_hash_find_ptr(FC(imports_const), unqualified_name); if (import_name && !zend_string_equals(import_name, name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare const %s because " "the name is already in use", ZSTR_VAL(name)); } } name_node.op_type = IS_CONST; ZVAL_STR(&name_node.u.constant, name); zend_emit_op(NULL, ZEND_DECLARE_CONST, &name_node, &value_node); zend_register_seen_symbol(name, ZEND_SYMBOL_CONST); } } /* }}}*/ void zend_compile_namespace(zend_ast *ast) /* {{{ */ { zend_ast *name_ast = ast->child[0]; zend_ast *stmt_ast = ast->child[1]; zend_string *name; zend_bool with_bracket = stmt_ast != NULL; /* handle mixed syntax declaration or nested namespaces */ if (!FC(has_bracketed_namespaces)) { if (FC(current_namespace)) { /* previous namespace declarations were unbracketed */ if (with_bracket) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix bracketed namespace declarations " "with unbracketed namespace declarations"); } } } else { /* previous namespace declarations were bracketed */ if (!with_bracket) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix bracketed namespace declarations " "with unbracketed namespace declarations"); } else if (FC(current_namespace) || FC(in_namespace)) { zend_error_noreturn(E_COMPILE_ERROR, "Namespace declarations cannot be nested"); } } if (((!with_bracket && !FC(current_namespace)) || (with_bracket && !FC(has_bracketed_namespaces))) && CG(active_op_array)->last > 0 ) { /* ignore ZEND_EXT_STMT and ZEND_TICKS */ uint32_t num = CG(active_op_array)->last; while (num > 0 && (CG(active_op_array)->opcodes[num-1].opcode == ZEND_EXT_STMT || CG(active_op_array)->opcodes[num-1].opcode == ZEND_TICKS)) { --num; } if (num > 0) { zend_error_noreturn(E_COMPILE_ERROR, "Namespace declaration statement has to be " "the very first statement or after any declare call in the script"); } } if (FC(current_namespace)) { zend_string_release_ex(FC(current_namespace), 0); } if (name_ast) { name = zend_ast_get_str(name_ast); if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type(name)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as namespace name", ZSTR_VAL(name)); } FC(current_namespace) = zend_string_copy(name); } else { FC(current_namespace) = NULL; } zend_reset_import_tables(); FC(in_namespace) = 1; if (with_bracket) { FC(has_bracketed_namespaces) = 1; } if (stmt_ast) { zend_compile_top_stmt(stmt_ast); zend_end_namespace(); } } /* }}} */ void zend_compile_halt_compiler(zend_ast *ast) /* {{{ */ { zend_ast *offset_ast = ast->child[0]; zend_long offset = Z_LVAL_P(zend_ast_get_zval(offset_ast)); zend_string *filename, *name; const char const_name[] = "__COMPILER_HALT_OFFSET__"; if (FC(has_bracketed_namespaces) && FC(in_namespace)) { zend_error_noreturn(E_COMPILE_ERROR, "__HALT_COMPILER() can only be used from the outermost scope"); } filename = zend_get_compiled_filename(); name = zend_mangle_property_name(const_name, sizeof(const_name) - 1, ZSTR_VAL(filename), ZSTR_LEN(filename), 0); zend_register_long_constant(ZSTR_VAL(name), ZSTR_LEN(name), offset, CONST_CS, 0); zend_string_release_ex(name, 0); } /* }}} */ static zend_bool zend_try_ct_eval_magic_const(zval *zv, zend_ast *ast) /* {{{ */ { zend_op_array *op_array = CG(active_op_array); zend_class_entry *ce = CG(active_class_entry); switch (ast->attr) { case T_LINE: ZVAL_LONG(zv, ast->lineno); break; case T_FILE: ZVAL_STR_COPY(zv, CG(compiled_filename)); break; case T_DIR: { zend_string *filename = CG(compiled_filename); zend_string *dirname = zend_string_init(ZSTR_VAL(filename), ZSTR_LEN(filename), 0); #ifdef ZEND_WIN32 ZSTR_LEN(dirname) = php_win32_ioutil_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname)); #else ZSTR_LEN(dirname) = zend_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname)); #endif if (strcmp(ZSTR_VAL(dirname), ".") == 0) { dirname = zend_string_extend(dirname, MAXPATHLEN, 0); #if HAVE_GETCWD ZEND_IGNORE_VALUE(VCWD_GETCWD(ZSTR_VAL(dirname), MAXPATHLEN)); #elif HAVE_GETWD ZEND_IGNORE_VALUE(VCWD_GETWD(ZSTR_VAL(dirname))); #endif ZSTR_LEN(dirname) = strlen(ZSTR_VAL(dirname)); } ZVAL_STR(zv, dirname); break; } case T_FUNC_C: if (op_array && op_array->function_name) { ZVAL_STR_COPY(zv, op_array->function_name); } else { ZVAL_EMPTY_STRING(zv); } break; case T_METHOD_C: /* Detect whether we are directly inside a class (e.g. a class constant) and treat * this as not being inside a function. */ if (op_array && ce && !op_array->scope && !(op_array->fn_flags & ZEND_ACC_CLOSURE)) { op_array = NULL; } if (op_array && op_array->function_name) { if (op_array->scope) { ZVAL_NEW_STR(zv, zend_concat3( ZSTR_VAL(op_array->scope->name), ZSTR_LEN(op_array->scope->name), "::", 2, ZSTR_VAL(op_array->function_name), ZSTR_LEN(op_array->function_name))); } else { ZVAL_STR_COPY(zv, op_array->function_name); } } else { ZVAL_EMPTY_STRING(zv); } break; case T_CLASS_C: if (ce) { if ((ce->ce_flags & ZEND_ACC_TRAIT) != 0) { return 0; } else { ZVAL_STR_COPY(zv, ce->name); } } else { ZVAL_EMPTY_STRING(zv); } break; case T_TRAIT_C: if (ce && (ce->ce_flags & ZEND_ACC_TRAIT) != 0) { ZVAL_STR_COPY(zv, ce->name); } else { ZVAL_EMPTY_STRING(zv); } break; case T_NS_C: if (FC(current_namespace)) { ZVAL_STR_COPY(zv, FC(current_namespace)); } else { ZVAL_EMPTY_STRING(zv); } break; EMPTY_SWITCH_DEFAULT_CASE() } return 1; } /* }}} */ ZEND_API zend_bool zend_binary_op_produces_numeric_string_error(uint32_t opcode, zval *op1, zval *op2) /* {{{ */ { if (!(opcode == ZEND_ADD || opcode == ZEND_SUB || opcode == ZEND_MUL || opcode == ZEND_DIV || opcode == ZEND_POW || opcode == ZEND_MOD || opcode == ZEND_SL || opcode == ZEND_SR || opcode == ZEND_BW_OR || opcode == ZEND_BW_AND || opcode == ZEND_BW_XOR)) { return 0; } /* While basic arithmetic operators always produce numeric string errors, * bitwise operators don't produce errors if both operands are strings */ if ((opcode == ZEND_BW_OR || opcode == ZEND_BW_AND || opcode == ZEND_BW_XOR) && Z_TYPE_P(op1) == IS_STRING && Z_TYPE_P(op2) == IS_STRING) { return 0; } if (Z_TYPE_P(op1) == IS_STRING && !is_numeric_string(Z_STRVAL_P(op1), Z_STRLEN_P(op1), NULL, NULL, 0)) { return 1; } if (Z_TYPE_P(op2) == IS_STRING && !is_numeric_string(Z_STRVAL_P(op2), Z_STRLEN_P(op2), NULL, NULL, 0)) { return 1; } return 0; } /* }}} */ ZEND_API zend_bool zend_binary_op_produces_array_conversion_error(uint32_t opcode, zval *op1, zval *op2) /* {{{ */ { if (opcode == ZEND_CONCAT && (Z_TYPE_P(op1) == IS_ARRAY || Z_TYPE_P(op2) == IS_ARRAY)) { return 1; } return 0; } /* }}} */ static inline zend_bool zend_try_ct_eval_binary_op(zval *result, uint32_t opcode, zval *op1, zval *op2) /* {{{ */ { binary_op_type fn = get_binary_op(opcode); /* don't evaluate division by zero at compile-time */ if ((opcode == ZEND_DIV || opcode == ZEND_MOD) && zval_get_long(op2) == 0) { return 0; } else if ((opcode == ZEND_SL || opcode == ZEND_SR) && zval_get_long(op2) < 0) { return 0; } /* don't evaluate numeric string error-producing operations at compile-time */ if (zend_binary_op_produces_numeric_string_error(opcode, op1, op2)) { return 0; } /* don't evaluate array to string conversions at compile-time */ if (zend_binary_op_produces_array_conversion_error(opcode, op1, op2)) { return 0; } fn(result, op1, op2); return 1; } /* }}} */ static inline void zend_ct_eval_unary_op(zval *result, uint32_t opcode, zval *op) /* {{{ */ { unary_op_type fn = get_unary_op(opcode); fn(result, op); } /* }}} */ static inline zend_bool zend_try_ct_eval_unary_pm(zval *result, zend_ast_kind kind, zval *op) /* {{{ */ { zval left; ZVAL_LONG(&left, (kind == ZEND_AST_UNARY_PLUS) ? 1 : -1); return zend_try_ct_eval_binary_op(result, ZEND_MUL, &left, op); } /* }}} */ static inline void zend_ct_eval_greater(zval *result, zend_ast_kind kind, zval *op1, zval *op2) /* {{{ */ { binary_op_type fn = kind == ZEND_AST_GREATER ? is_smaller_function : is_smaller_or_equal_function; fn(result, op2, op1); } /* }}} */ static zend_bool zend_try_ct_eval_array(zval *result, zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); zend_ast *last_elem_ast = NULL; uint32_t i; zend_bool is_constant = 1; if (ast->attr == ZEND_ARRAY_SYNTAX_LIST) { zend_error(E_COMPILE_ERROR, "Cannot use list() as standalone expression"); } /* First ensure that *all* child nodes are constant and by-val */ for (i = 0; i < list->children; ++i) { zend_ast *elem_ast = list->child[i]; if (elem_ast == NULL) { /* Report error at line of last non-empty element */ if (last_elem_ast) { CG(zend_lineno) = zend_ast_get_lineno(last_elem_ast); } zend_error(E_COMPILE_ERROR, "Cannot use empty array elements in arrays"); } if (elem_ast->kind != ZEND_AST_UNPACK) { zend_eval_const_expr(&elem_ast->child[0]); zend_eval_const_expr(&elem_ast->child[1]); if (elem_ast->attr /* by_ref */ || elem_ast->child[0]->kind != ZEND_AST_ZVAL || (elem_ast->child[1] && elem_ast->child[1]->kind != ZEND_AST_ZVAL) ) { is_constant = 0; } } else { zend_eval_const_expr(&elem_ast->child[0]); if (elem_ast->child[0]->kind != ZEND_AST_ZVAL) { is_constant = 0; } } last_elem_ast = elem_ast; } if (!is_constant) { return 0; } if (!list->children) { ZVAL_EMPTY_ARRAY(result); return 1; } array_init_size(result, list->children); for (i = 0; i < list->children; ++i) { zend_ast *elem_ast = list->child[i]; zend_ast *value_ast = elem_ast->child[0]; zend_ast *key_ast; zval *value = zend_ast_get_zval(value_ast); if (elem_ast->kind == ZEND_AST_UNPACK) { if (Z_TYPE_P(value) == IS_ARRAY) { HashTable *ht = Z_ARRVAL_P(value); zval *val; zend_string *key; ZEND_HASH_FOREACH_STR_KEY_VAL(ht, key, val) { if (key) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot unpack array with string keys"); } if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), val)) { zval_ptr_dtor(result); return 0; } Z_TRY_ADDREF_P(val); } ZEND_HASH_FOREACH_END(); continue; } else { zend_error_noreturn(E_COMPILE_ERROR, "Only arrays and Traversables can be unpacked"); } } Z_TRY_ADDREF_P(value); key_ast = elem_ast->child[1]; if (key_ast) { zval *key = zend_ast_get_zval(key_ast); switch (Z_TYPE_P(key)) { case IS_LONG: zend_hash_index_update(Z_ARRVAL_P(result), Z_LVAL_P(key), value); break; case IS_STRING: zend_symtable_update(Z_ARRVAL_P(result), Z_STR_P(key), value); break; case IS_DOUBLE: zend_hash_index_update(Z_ARRVAL_P(result), zend_dval_to_lval(Z_DVAL_P(key)), value); break; case IS_FALSE: zend_hash_index_update(Z_ARRVAL_P(result), 0, value); break; case IS_TRUE: zend_hash_index_update(Z_ARRVAL_P(result), 1, value); break; case IS_NULL: zend_hash_update(Z_ARRVAL_P(result), ZSTR_EMPTY_ALLOC(), value); break; default: zend_error_noreturn(E_COMPILE_ERROR, "Illegal offset type"); break; } } else { if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), value)) { zval_ptr_dtor_nogc(value); zval_ptr_dtor(result); return 0; } } } return 1; } /* }}} */ void zend_compile_binary_op(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *left_ast = ast->child[0]; zend_ast *right_ast = ast->child[1]; uint32_t opcode = ast->attr; if ((opcode == ZEND_ADD || opcode == ZEND_SUB) && left_ast->kind == ZEND_AST_BINARY_OP && left_ast->attr == ZEND_CONCAT) { zend_error(E_DEPRECATED, "The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence"); } if ((opcode == ZEND_SL || opcode == ZEND_SR) && ((left_ast->kind == ZEND_AST_BINARY_OP && left_ast->attr == ZEND_CONCAT) || (right_ast->kind == ZEND_AST_BINARY_OP && right_ast->attr == ZEND_CONCAT))) { zend_error(E_DEPRECATED, "The behavior of unparenthesized expressions containing both '.' and '>>'/'<<' will change in PHP 8: '<<'/'>>' will take a higher precedence"); } if (opcode == ZEND_PARENTHESIZED_CONCAT) { opcode = ZEND_CONCAT; } znode left_node, right_node; zend_compile_expr(&left_node, left_ast); zend_compile_expr(&right_node, right_ast); if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) { if (zend_try_ct_eval_binary_op(&result->u.constant, opcode, &left_node.u.constant, &right_node.u.constant) ) { result->op_type = IS_CONST; zval_ptr_dtor(&left_node.u.constant); zval_ptr_dtor(&right_node.u.constant); return; } } do { if (opcode == ZEND_IS_EQUAL || opcode == ZEND_IS_NOT_EQUAL) { if (left_node.op_type == IS_CONST) { if (Z_TYPE(left_node.u.constant) == IS_FALSE) { opcode = (opcode == ZEND_IS_NOT_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT; zend_emit_op_tmp(result, opcode, &right_node, NULL); break; } else if (Z_TYPE(left_node.u.constant) == IS_TRUE) { opcode = (opcode == ZEND_IS_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT; zend_emit_op_tmp(result, opcode, &right_node, NULL); break; } } else if (right_node.op_type == IS_CONST) { if (Z_TYPE(right_node.u.constant) == IS_FALSE) { opcode = (opcode == ZEND_IS_NOT_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT; zend_emit_op_tmp(result, opcode, &left_node, NULL); break; } else if (Z_TYPE(right_node.u.constant) == IS_TRUE) { opcode = (opcode == ZEND_IS_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT; zend_emit_op_tmp(result, opcode, &left_node, NULL); break; } } } if (opcode == ZEND_CONCAT) { /* convert constant operands to strings at compile-time */ if (left_node.op_type == IS_CONST) { if (Z_TYPE(left_node.u.constant) == IS_ARRAY) { zend_emit_op_tmp(&left_node, ZEND_CAST, &left_node, NULL)->extended_value = IS_STRING; } else { convert_to_string(&left_node.u.constant); } } if (right_node.op_type == IS_CONST) { if (Z_TYPE(right_node.u.constant) == IS_ARRAY) { zend_emit_op_tmp(&right_node, ZEND_CAST, &right_node, NULL)->extended_value = IS_STRING; } else { convert_to_string(&right_node.u.constant); } } if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) { opcode = ZEND_FAST_CONCAT; } } zend_emit_op_tmp(result, opcode, &left_node, &right_node); } while (0); } /* }}} */ /* We do not use zend_compile_binary_op for this because we want to retain the left-to-right * evaluation order. */ void zend_compile_greater(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *left_ast = ast->child[0]; zend_ast *right_ast = ast->child[1]; znode left_node, right_node; ZEND_ASSERT(ast->kind == ZEND_AST_GREATER || ast->kind == ZEND_AST_GREATER_EQUAL); zend_compile_expr(&left_node, left_ast); zend_compile_expr(&right_node, right_ast); if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) { result->op_type = IS_CONST; zend_ct_eval_greater(&result->u.constant, ast->kind, &left_node.u.constant, &right_node.u.constant); zval_ptr_dtor(&left_node.u.constant); zval_ptr_dtor(&right_node.u.constant); return; } zend_emit_op_tmp(result, ast->kind == ZEND_AST_GREATER ? ZEND_IS_SMALLER : ZEND_IS_SMALLER_OR_EQUAL, &right_node, &left_node); } /* }}} */ void zend_compile_unary_op(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; uint32_t opcode = ast->attr; znode expr_node; zend_compile_expr(&expr_node, expr_ast); if (expr_node.op_type == IS_CONST) { result->op_type = IS_CONST; zend_ct_eval_unary_op(&result->u.constant, opcode, &expr_node.u.constant); zval_ptr_dtor(&expr_node.u.constant); return; } zend_emit_op_tmp(result, opcode, &expr_node, NULL); } /* }}} */ void zend_compile_unary_pm(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; znode expr_node; znode lefthand_node; ZEND_ASSERT(ast->kind == ZEND_AST_UNARY_PLUS || ast->kind == ZEND_AST_UNARY_MINUS); zend_compile_expr(&expr_node, expr_ast); if (expr_node.op_type == IS_CONST) { if (zend_try_ct_eval_unary_pm(&result->u.constant, ast->kind, &expr_node.u.constant)) { result->op_type = IS_CONST; zval_ptr_dtor(&expr_node.u.constant); return; } } lefthand_node.op_type = IS_CONST; ZVAL_LONG(&lefthand_node.u.constant, (ast->kind == ZEND_AST_UNARY_PLUS) ? 1 : -1); zend_emit_op_tmp(result, ZEND_MUL, &lefthand_node, &expr_node); } /* }}} */ void zend_compile_short_circuiting(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *left_ast = ast->child[0]; zend_ast *right_ast = ast->child[1]; znode left_node, right_node; zend_op *opline_jmpz, *opline_bool; uint32_t opnum_jmpz; ZEND_ASSERT(ast->kind == ZEND_AST_AND || ast->kind == ZEND_AST_OR); zend_compile_expr(&left_node, left_ast); if (left_node.op_type == IS_CONST) { if ((ast->kind == ZEND_AST_AND && !zend_is_true(&left_node.u.constant)) || (ast->kind == ZEND_AST_OR && zend_is_true(&left_node.u.constant))) { result->op_type = IS_CONST; ZVAL_BOOL(&result->u.constant, zend_is_true(&left_node.u.constant)); } else { zend_compile_expr(&right_node, right_ast); if (right_node.op_type == IS_CONST) { result->op_type = IS_CONST; ZVAL_BOOL(&result->u.constant, zend_is_true(&right_node.u.constant)); zval_ptr_dtor(&right_node.u.constant); } else { zend_emit_op_tmp(result, ZEND_BOOL, &right_node, NULL); } } zval_ptr_dtor(&left_node.u.constant); return; } opnum_jmpz = get_next_op_number(); opline_jmpz = zend_emit_op(NULL, ast->kind == ZEND_AST_AND ? ZEND_JMPZ_EX : ZEND_JMPNZ_EX, &left_node, NULL); if (left_node.op_type == IS_TMP_VAR) { SET_NODE(opline_jmpz->result, &left_node); } else { opline_jmpz->result.var = get_temporary_variable(); opline_jmpz->result_type = IS_TMP_VAR; } GET_NODE(result, opline_jmpz->result); zend_compile_expr(&right_node, right_ast); opline_bool = zend_emit_op(NULL, ZEND_BOOL, &right_node, NULL); SET_NODE(opline_bool->result, result); zend_update_jump_target_to_next(opnum_jmpz); } /* }}} */ void zend_compile_post_incdec(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; ZEND_ASSERT(ast->kind == ZEND_AST_POST_INC || ast->kind == ZEND_AST_POST_DEC); zend_ensure_writable_variable(var_ast); if (var_ast->kind == ZEND_AST_PROP) { zend_op *opline = zend_compile_prop(NULL, var_ast, BP_VAR_RW, 0); opline->opcode = ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC_OBJ : ZEND_POST_DEC_OBJ; zend_make_tmp_result(result, opline); } else if (var_ast->kind == ZEND_AST_STATIC_PROP) { zend_op *opline = zend_compile_static_prop(NULL, var_ast, BP_VAR_RW, 0, 0); opline->opcode = ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC_STATIC_PROP : ZEND_POST_DEC_STATIC_PROP; zend_make_tmp_result(result, opline); } else { znode var_node; zend_compile_var(&var_node, var_ast, BP_VAR_RW, 0); zend_emit_op_tmp(result, ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC : ZEND_POST_DEC, &var_node, NULL); } } /* }}} */ void zend_compile_pre_incdec(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; ZEND_ASSERT(ast->kind == ZEND_AST_PRE_INC || ast->kind == ZEND_AST_PRE_DEC); zend_ensure_writable_variable(var_ast); if (var_ast->kind == ZEND_AST_PROP) { zend_op *opline = zend_compile_prop(result, var_ast, BP_VAR_RW, 0); opline->opcode = ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC_OBJ : ZEND_PRE_DEC_OBJ; } else if (var_ast->kind == ZEND_AST_STATIC_PROP) { zend_op *opline = zend_compile_static_prop(result, var_ast, BP_VAR_RW, 0, 0); opline->opcode = ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC_STATIC_PROP : ZEND_PRE_DEC_STATIC_PROP; } else { znode var_node; zend_compile_var(&var_node, var_ast, BP_VAR_RW, 0); zend_emit_op(result, ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC : ZEND_PRE_DEC, &var_node, NULL); } } /* }}} */ void zend_compile_cast(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; znode expr_node; zend_op *opline; zend_compile_expr(&expr_node, expr_ast); opline = zend_emit_op_tmp(result, ZEND_CAST, &expr_node, NULL); opline->extended_value = ast->attr; if (ast->attr == IS_NULL) { zend_error(E_DEPRECATED, "The (unset) cast is deprecated"); } } /* }}} */ static void zend_compile_shorthand_conditional(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *cond_ast = ast->child[0]; zend_ast *false_ast = ast->child[2]; znode cond_node, false_node; zend_op *opline_qm_assign; uint32_t opnum_jmp_set; ZEND_ASSERT(ast->child[1] == NULL); zend_compile_expr(&cond_node, cond_ast); opnum_jmp_set = get_next_op_number(); zend_emit_op_tmp(result, ZEND_JMP_SET, &cond_node, NULL); zend_compile_expr(&false_node, false_ast); opline_qm_assign = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &false_node, NULL); SET_NODE(opline_qm_assign->result, result); zend_update_jump_target_to_next(opnum_jmp_set); } /* }}} */ void zend_compile_conditional(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *cond_ast = ast->child[0]; zend_ast *true_ast = ast->child[1]; zend_ast *false_ast = ast->child[2]; znode cond_node, true_node, false_node; zend_op *opline_qm_assign2; uint32_t opnum_jmpz, opnum_jmp; if (cond_ast->kind == ZEND_AST_CONDITIONAL && cond_ast->attr != ZEND_PARENTHESIZED_CONDITIONAL) { if (cond_ast->child[1]) { if (true_ast) { zend_error(E_DEPRECATED, "Unparenthesized `a ? b : c ? d : e` is deprecated. " "Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`"); } else { zend_error(E_DEPRECATED, "Unparenthesized `a ? b : c ?: d` is deprecated. " "Use either `(a ? b : c) ?: d` or `a ? b : (c ?: d)`"); } } else { if (true_ast) { zend_error(E_DEPRECATED, "Unparenthesized `a ?: b ? c : d` is deprecated. " "Use either `(a ?: b) ? c : d` or `a ?: (b ? c : d)`"); } else { /* This case is harmless: (a ?: b) ?: c always produces the same result * as a ?: (b ?: c). */ } } } if (!true_ast) { zend_compile_shorthand_conditional(result, ast); return; } zend_compile_expr(&cond_node, cond_ast); opnum_jmpz = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0); zend_compile_expr(&true_node, true_ast); zend_emit_op_tmp(result, ZEND_QM_ASSIGN, &true_node, NULL); opnum_jmp = zend_emit_jump(0); zend_update_jump_target_to_next(opnum_jmpz); zend_compile_expr(&false_node, false_ast); opline_qm_assign2 = zend_emit_op(NULL, ZEND_QM_ASSIGN, &false_node, NULL); SET_NODE(opline_qm_assign2->result, result); zend_update_jump_target_to_next(opnum_jmp); } /* }}} */ void zend_compile_coalesce(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; zend_ast *default_ast = ast->child[1]; znode expr_node, default_node; zend_op *opline; uint32_t opnum; zend_compile_var(&expr_node, expr_ast, BP_VAR_IS, 0); opnum = get_next_op_number(); zend_emit_op_tmp(result, ZEND_COALESCE, &expr_node, NULL); zend_compile_expr(&default_node, default_ast); opline = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &default_node, NULL); SET_NODE(opline->result, result); opline = &CG(active_op_array)->opcodes[opnum]; opline->op2.opline_num = get_next_op_number(); } /* }}} */ static void znode_dtor(zval *zv) { znode *node = Z_PTR_P(zv); if (node->op_type == IS_CONST) { zval_ptr_dtor_nogc(&node->u.constant); } efree(node); } void zend_compile_assign_coalesce(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; zend_ast *default_ast = ast->child[1]; znode var_node_is, var_node_w, default_node, assign_node, *node; zend_op *opline; uint32_t coalesce_opnum; zend_bool need_frees = 0; /* Remember expressions compiled during the initial BP_VAR_IS lookup, * to avoid double-evaluation when we compile again with BP_VAR_W. */ HashTable *orig_memoized_exprs = CG(memoized_exprs); int orig_memoize_mode = CG(memoize_mode); zend_ensure_writable_variable(var_ast); if (is_this_fetch(var_ast)) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this"); } ALLOC_HASHTABLE(CG(memoized_exprs)); zend_hash_init(CG(memoized_exprs), 0, NULL, znode_dtor, 0); CG(memoize_mode) = ZEND_MEMOIZE_COMPILE; zend_compile_var(&var_node_is, var_ast, BP_VAR_IS, 0); coalesce_opnum = get_next_op_number(); zend_emit_op_tmp(result, ZEND_COALESCE, &var_node_is, NULL); CG(memoize_mode) = ZEND_MEMOIZE_NONE; zend_compile_expr(&default_node, default_ast); CG(memoize_mode) = ZEND_MEMOIZE_FETCH; zend_compile_var(&var_node_w, var_ast, BP_VAR_W, 0); /* Reproduce some of the zend_compile_assign() opcode fixup logic here. */ opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1]; switch (var_ast->kind) { case ZEND_AST_VAR: zend_emit_op(&assign_node, ZEND_ASSIGN, &var_node_w, &default_node); break; case ZEND_AST_STATIC_PROP: opline->opcode = ZEND_ASSIGN_STATIC_PROP; zend_emit_op_data(&default_node); assign_node = var_node_w; break; case ZEND_AST_DIM: opline->opcode = ZEND_ASSIGN_DIM; zend_emit_op_data(&default_node); assign_node = var_node_w; break; case ZEND_AST_PROP: opline->opcode = ZEND_ASSIGN_OBJ; zend_emit_op_data(&default_node); assign_node = var_node_w; break; EMPTY_SWITCH_DEFAULT_CASE(); } opline = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &assign_node, NULL); SET_NODE(opline->result, result); ZEND_HASH_FOREACH_PTR(CG(memoized_exprs), node) { if (node->op_type == IS_TMP_VAR || node->op_type == IS_VAR) { need_frees = 1; break; } } ZEND_HASH_FOREACH_END(); /* Free DUPed expressions if there are any */ if (need_frees) { uint32_t jump_opnum = zend_emit_jump(0); zend_update_jump_target_to_next(coalesce_opnum); ZEND_HASH_FOREACH_PTR(CG(memoized_exprs), node) { if (node->op_type == IS_TMP_VAR || node->op_type == IS_VAR) { zend_emit_op(NULL, ZEND_FREE, node, NULL); } } ZEND_HASH_FOREACH_END(); zend_update_jump_target_to_next(jump_opnum); } else { zend_update_jump_target_to_next(coalesce_opnum); } zend_hash_destroy(CG(memoized_exprs)); FREE_HASHTABLE(CG(memoized_exprs)); CG(memoized_exprs) = orig_memoized_exprs; CG(memoize_mode) = orig_memoize_mode; } /* }}} */ void zend_compile_print(znode *result, zend_ast *ast) /* {{{ */ { zend_op *opline; zend_ast *expr_ast = ast->child[0]; znode expr_node; zend_compile_expr(&expr_node, expr_ast); opline = zend_emit_op(NULL, ZEND_ECHO, &expr_node, NULL); opline->extended_value = 1; result->op_type = IS_CONST; ZVAL_LONG(&result->u.constant, 1); } /* }}} */ void zend_compile_exit(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; if (expr_ast) { znode expr_node; zend_compile_expr(&expr_node, expr_ast); zend_emit_op(NULL, ZEND_EXIT, &expr_node, NULL); } else { zend_emit_op(NULL, ZEND_EXIT, NULL, NULL); } result->op_type = IS_CONST; ZVAL_BOOL(&result->u.constant, 1); } /* }}} */ void zend_compile_yield(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *value_ast = ast->child[0]; zend_ast *key_ast = ast->child[1]; znode value_node, key_node; znode *value_node_ptr = NULL, *key_node_ptr = NULL; zend_op *opline; zend_bool returns_by_ref = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0; zend_mark_function_as_generator(); if (key_ast) { zend_compile_expr(&key_node, key_ast); key_node_ptr = &key_node; } if (value_ast) { if (returns_by_ref && zend_is_variable(value_ast)) { zend_compile_var(&value_node, value_ast, BP_VAR_W, 1); } else { zend_compile_expr(&value_node, value_ast); } value_node_ptr = &value_node; } opline = zend_emit_op(result, ZEND_YIELD, value_node_ptr, key_node_ptr); if (value_ast && returns_by_ref && zend_is_call(value_ast)) { opline->extended_value = ZEND_RETURNS_FUNCTION; } } /* }}} */ void zend_compile_yield_from(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; znode expr_node; zend_mark_function_as_generator(); if (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use \"yield from\" inside a by-reference generator"); } zend_compile_expr(&expr_node, expr_ast); zend_emit_op_tmp(result, ZEND_YIELD_FROM, &expr_node, NULL); } /* }}} */ void zend_compile_instanceof(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *obj_ast = ast->child[0]; zend_ast *class_ast = ast->child[1]; znode obj_node, class_node; zend_op *opline; zend_compile_expr(&obj_node, obj_ast); if (obj_node.op_type == IS_CONST) { zend_do_free(&obj_node); result->op_type = IS_CONST; ZVAL_FALSE(&result->u.constant); return; } zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_NO_AUTOLOAD | ZEND_FETCH_CLASS_EXCEPTION); opline = zend_emit_op_tmp(result, ZEND_INSTANCEOF, &obj_node, NULL); if (class_node.op_type == IS_CONST) { opline->op2_type = IS_CONST; opline->op2.constant = zend_add_class_name_literal( Z_STR(class_node.u.constant)); opline->extended_value = zend_alloc_cache_slot(); } else { SET_NODE(opline->op2, &class_node); } } /* }}} */ void zend_compile_include_or_eval(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; znode expr_node; zend_op *opline; zend_do_extended_fcall_begin(); zend_compile_expr(&expr_node, expr_ast); opline = zend_emit_op(result, ZEND_INCLUDE_OR_EVAL, &expr_node, NULL); opline->extended_value = ast->attr; zend_do_extended_fcall_end(); } /* }}} */ void zend_compile_isset_or_empty(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *var_ast = ast->child[0]; znode var_node; zend_op *opline = NULL; ZEND_ASSERT(ast->kind == ZEND_AST_ISSET || ast->kind == ZEND_AST_EMPTY); if (!zend_is_variable(var_ast)) { if (ast->kind == ZEND_AST_EMPTY) { /* empty(expr) can be transformed to !expr */ zend_ast *not_ast = zend_ast_create_ex(ZEND_AST_UNARY_OP, ZEND_BOOL_NOT, var_ast); zend_compile_expr(result, not_ast); return; } else { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use isset() on the result of an expression " "(you can use \"null !== expression\" instead)"); } } switch (var_ast->kind) { case ZEND_AST_VAR: if (is_this_fetch(var_ast)) { opline = zend_emit_op(result, ZEND_ISSET_ISEMPTY_THIS, NULL, NULL); CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS; } else if (zend_try_compile_cv(&var_node, var_ast) == SUCCESS) { opline = zend_emit_op(result, ZEND_ISSET_ISEMPTY_CV, &var_node, NULL); } else { opline = zend_compile_simple_var_no_cv(result, var_ast, BP_VAR_IS, 0); opline->opcode = ZEND_ISSET_ISEMPTY_VAR; } break; case ZEND_AST_DIM: opline = zend_compile_dim(result, var_ast, BP_VAR_IS); opline->opcode = ZEND_ISSET_ISEMPTY_DIM_OBJ; break; case ZEND_AST_PROP: opline = zend_compile_prop(result, var_ast, BP_VAR_IS, 0); opline->opcode = ZEND_ISSET_ISEMPTY_PROP_OBJ; break; case ZEND_AST_STATIC_PROP: opline = zend_compile_static_prop(result, var_ast, BP_VAR_IS, 0, 0); opline->opcode = ZEND_ISSET_ISEMPTY_STATIC_PROP; break; EMPTY_SWITCH_DEFAULT_CASE() } result->op_type = opline->result_type = IS_TMP_VAR; if (!(ast->kind == ZEND_AST_ISSET)) { opline->extended_value |= ZEND_ISEMPTY; } } /* }}} */ void zend_compile_silence(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; znode silence_node; zend_emit_op_tmp(&silence_node, ZEND_BEGIN_SILENCE, NULL, NULL); if (expr_ast->kind == ZEND_AST_VAR) { /* For @$var we need to force a FETCH instruction, otherwise the CV access will * happen outside the silenced section. */ zend_compile_simple_var_no_cv(result, expr_ast, BP_VAR_R, 0 ); } else { zend_compile_expr(result, expr_ast); } zend_emit_op(NULL, ZEND_END_SILENCE, &silence_node, NULL); } /* }}} */ void zend_compile_shell_exec(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *expr_ast = ast->child[0]; zval fn_name; zend_ast *name_ast, *args_ast, *call_ast; ZVAL_STRING(&fn_name, "shell_exec"); name_ast = zend_ast_create_zval(&fn_name); args_ast = zend_ast_create_list(1, ZEND_AST_ARG_LIST, expr_ast); call_ast = zend_ast_create(ZEND_AST_CALL, name_ast, args_ast); zend_compile_expr(result, call_ast); zval_ptr_dtor(&fn_name); } /* }}} */ void zend_compile_array(znode *result, zend_ast *ast) /* {{{ */ { zend_ast_list *list = zend_ast_get_list(ast); zend_op *opline; uint32_t i, opnum_init = -1; zend_bool packed = 1; if (zend_try_ct_eval_array(&result->u.constant, ast)) { result->op_type = IS_CONST; return; } /* Empty arrays are handled at compile-time */ ZEND_ASSERT(list->children > 0); for (i = 0; i < list->children; ++i) { zend_ast *elem_ast = list->child[i]; zend_ast *value_ast, *key_ast; zend_bool by_ref; znode value_node, key_node, *key_node_ptr = NULL; if (elem_ast == NULL) { zend_error(E_COMPILE_ERROR, "Cannot use empty array elements in arrays"); } value_ast = elem_ast->child[0]; if (elem_ast->kind == ZEND_AST_UNPACK) { zend_compile_expr(&value_node, value_ast); if (i == 0) { opnum_init = get_next_op_number(); opline = zend_emit_op_tmp(result, ZEND_INIT_ARRAY, NULL, NULL); } opline = zend_emit_op(NULL, ZEND_ADD_ARRAY_UNPACK, &value_node, NULL); SET_NODE(opline->result, result); continue; } key_ast = elem_ast->child[1]; by_ref = elem_ast->attr; if (key_ast) { zend_compile_expr(&key_node, key_ast); zend_handle_numeric_op(&key_node); key_node_ptr = &key_node; } if (by_ref) { zend_ensure_writable_variable(value_ast); zend_compile_var(&value_node, value_ast, BP_VAR_W, 1); } else { zend_compile_expr(&value_node, value_ast); } if (i == 0) { opnum_init = get_next_op_number(); opline = zend_emit_op_tmp(result, ZEND_INIT_ARRAY, &value_node, key_node_ptr); opline->extended_value = list->children << ZEND_ARRAY_SIZE_SHIFT; } else { opline = zend_emit_op(NULL, ZEND_ADD_ARRAY_ELEMENT, &value_node, key_node_ptr); SET_NODE(opline->result, result); } opline->extended_value |= by_ref; if (key_ast && key_node.op_type == IS_CONST && Z_TYPE(key_node.u.constant) == IS_STRING) { packed = 0; } } /* Add a flag to INIT_ARRAY if we know this array cannot be packed */ if (!packed) { ZEND_ASSERT(opnum_init != (uint32_t)-1); opline = &CG(active_op_array)->opcodes[opnum_init]; opline->extended_value |= ZEND_ARRAY_NOT_PACKED; } } /* }}} */ void zend_compile_const(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *name_ast = ast->child[0]; zend_op *opline; zend_bool is_fully_qualified; zend_string *orig_name = zend_ast_get_str(name_ast); zend_string *resolved_name = zend_resolve_const_name(orig_name, name_ast->attr, &is_fully_qualified); if (zend_string_equals_literal(resolved_name, "__COMPILER_HALT_OFFSET__") || (name_ast->attr != ZEND_NAME_RELATIVE && zend_string_equals_literal(orig_name, "__COMPILER_HALT_OFFSET__"))) { zend_ast *last = CG(ast); while (last && last->kind == ZEND_AST_STMT_LIST) { zend_ast_list *list = zend_ast_get_list(last); if (list->children == 0) { break; } last = list->child[list->children-1]; } if (last && last->kind == ZEND_AST_HALT_COMPILER) { result->op_type = IS_CONST; ZVAL_LONG(&result->u.constant, Z_LVAL_P(zend_ast_get_zval(last->child[0]))); zend_string_release_ex(resolved_name, 0); return; } } if (zend_try_ct_eval_const(&result->u.constant, resolved_name, is_fully_qualified)) { result->op_type = IS_CONST; zend_string_release_ex(resolved_name, 0); return; } opline = zend_emit_op_tmp(result, ZEND_FETCH_CONSTANT, NULL, NULL); opline->op2_type = IS_CONST; if (is_fully_qualified) { opline->op2.constant = zend_add_const_name_literal( resolved_name, 0); } else { opline->op1.num = IS_CONSTANT_UNQUALIFIED; if (FC(current_namespace)) { opline->op1.num |= IS_CONSTANT_IN_NAMESPACE; opline->op2.constant = zend_add_const_name_literal( resolved_name, 1); } else { opline->op2.constant = zend_add_const_name_literal( resolved_name, 0); } } opline->extended_value = zend_alloc_cache_slot(); } /* }}} */ void zend_compile_class_const(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *class_ast = ast->child[0]; zend_ast *const_ast = ast->child[1]; znode class_node, const_node; zend_op *opline; zend_eval_const_expr(&ast->child[0]); zend_eval_const_expr(&ast->child[1]); class_ast = ast->child[0]; const_ast = ast->child[1]; if (class_ast->kind == ZEND_AST_ZVAL) { zend_string *resolved_name; resolved_name = zend_resolve_class_name_ast(class_ast); if (const_ast->kind == ZEND_AST_ZVAL && zend_try_ct_eval_class_const(&result->u.constant, resolved_name, zend_ast_get_str(const_ast))) { result->op_type = IS_CONST; zend_string_release_ex(resolved_name, 0); return; } zend_string_release_ex(resolved_name, 0); } zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION); zend_compile_expr(&const_node, const_ast); opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_CONSTANT, NULL, &const_node); zend_set_class_name_op1(opline, &class_node); opline->extended_value = zend_alloc_cache_slots(2); } /* }}} */ void zend_compile_class_name(znode *result, zend_ast *ast) /* {{{ */ { zend_ast *class_ast = ast->child[0]; zend_op *opline; if (zend_try_compile_const_expr_resolve_class_name(&result->u.constant, class_ast)) { result->op_type = IS_CONST; return; } opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_NAME, NULL, NULL); opline->op1.num = zend_get_class_fetch_type(zend_ast_get_str(class_ast)); } /* }}} */ static zend_op *zend_compile_rope_add_ex(zend_op *opline, znode *result, uint32_t num, znode *elem_node) /* {{{ */ { if (num == 0) { result->op_type = IS_TMP_VAR; result->u.op.var = -1; opline->opcode = ZEND_ROPE_INIT; } else { opline->opcode = ZEND_ROPE_ADD; SET_NODE(opline->op1, result); } SET_NODE(opline->op2, elem_node); SET_NODE(opline->result, result); opline->extended_value = num; return opline; } /* }}} */ static zend_op *zend_compile_rope_add(znode *result, uint32_t num, znode *elem_node) /* {{{ */ { zend_op *opline = get_next_op(); if (num == 0) { result->op_type = IS_TMP_VAR; result->u.op.var = -1; opline->opcode = ZEND_ROPE_INIT; } else { opline->opcode = ZEND_ROPE_ADD; SET_NODE(opline->op1, result); } SET_NODE(opline->op2, elem_node); SET_NODE(opline->result, result); opline->extended_value = num; return opline; } /* }}} */ static void zend_compile_encaps_list(znode *result, zend_ast *ast) /* {{{ */ { uint32_t i, j; uint32_t rope_init_lineno = -1; zend_op *opline = NULL, *init_opline; znode elem_node, last_const_node; zend_ast_list *list = zend_ast_get_list(ast); uint32_t reserved_op_number = -1; ZEND_ASSERT(list->children > 0); j = 0; last_const_node.op_type = IS_UNUSED; for (i = 0; i < list->children; i++) { zend_compile_expr(&elem_node, list->child[i]); if (elem_node.op_type == IS_CONST) { convert_to_string(&elem_node.u.constant); if (Z_STRLEN(elem_node.u.constant) == 0) { zval_ptr_dtor(&elem_node.u.constant); } else if (last_const_node.op_type == IS_CONST) { concat_function(&last_const_node.u.constant, &last_const_node.u.constant, &elem_node.u.constant); zval_ptr_dtor(&elem_node.u.constant); } else { last_const_node.op_type = IS_CONST; ZVAL_COPY_VALUE(&last_const_node.u.constant, &elem_node.u.constant); /* Reserve place for ZEND_ROPE_ADD instruction */ reserved_op_number = get_next_op_number(); opline = get_next_op(); opline->opcode = ZEND_NOP; } continue; } else { if (j == 0) { if (last_const_node.op_type == IS_CONST) { rope_init_lineno = reserved_op_number; } else { rope_init_lineno = get_next_op_number(); } } if (last_const_node.op_type == IS_CONST) { opline = &CG(active_op_array)->opcodes[reserved_op_number]; zend_compile_rope_add_ex(opline, result, j++, &last_const_node); last_const_node.op_type = IS_UNUSED; } opline = zend_compile_rope_add(result, j++, &elem_node); } } if (j == 0) { result->op_type = IS_CONST; if (last_const_node.op_type == IS_CONST) { ZVAL_COPY_VALUE(&result->u.constant, &last_const_node.u.constant); } else { ZVAL_EMPTY_STRING(&result->u.constant); /* empty string */ } CG(active_op_array)->last = reserved_op_number - 1; return; } else if (last_const_node.op_type == IS_CONST) { opline = &CG(active_op_array)->opcodes[reserved_op_number]; opline = zend_compile_rope_add_ex(opline, result, j++, &last_const_node); } init_opline = CG(active_op_array)->opcodes + rope_init_lineno; if (j == 1) { if (opline->op2_type == IS_CONST) { GET_NODE(result, opline->op2); MAKE_NOP(opline); } else { opline->opcode = ZEND_CAST; opline->extended_value = IS_STRING; opline->op1_type = opline->op2_type; opline->op1 = opline->op2; opline->result_type = IS_TMP_VAR; opline->result.var = get_temporary_variable(); SET_UNUSED(opline->op2); GET_NODE(result, opline->result); } } else if (j == 2) { opline->opcode = ZEND_FAST_CONCAT; opline->extended_value = 0; opline->op1_type = init_opline->op2_type; opline->op1 = init_opline->op2; opline->result_type = IS_TMP_VAR; opline->result.var = get_temporary_variable(); MAKE_NOP(init_opline); GET_NODE(result, opline->result); } else { uint32_t var; init_opline->extended_value = j; opline->opcode = ZEND_ROPE_END; opline->result.var = get_temporary_variable(); var = opline->op1.var = get_temporary_variable(); GET_NODE(result, opline->result); /* Allocates the necessary number of zval slots to keep the rope */ i = ((j * sizeof(zend_string*)) + (sizeof(zval) - 1)) / sizeof(zval); while (i > 1) { get_temporary_variable(); i--; } /* Update all the previous opcodes to use the same variable */ while (opline != init_opline) { opline--; if (opline->opcode == ZEND_ROPE_ADD && opline->result.var == (uint32_t)-1) { opline->op1.var = var; opline->result.var = var; } else if (opline->opcode == ZEND_ROPE_INIT && opline->result.var == (uint32_t)-1) { opline->result.var = var; } } } } /* }}} */ void zend_compile_magic_const(znode *result, zend_ast *ast) /* {{{ */ { zend_op *opline; if (zend_try_ct_eval_magic_const(&result->u.constant, ast)) { result->op_type = IS_CONST; return; } ZEND_ASSERT(ast->attr == T_CLASS_C && CG(active_class_entry) && (CG(active_class_entry)->ce_flags & ZEND_ACC_TRAIT) != 0); opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_NAME, NULL, NULL); opline->op1.num = ZEND_FETCH_CLASS_SELF; } /* }}} */ zend_bool zend_is_allowed_in_const_expr(zend_ast_kind kind) /* {{{ */ { return kind == ZEND_AST_ZVAL || kind == ZEND_AST_BINARY_OP || kind == ZEND_AST_GREATER || kind == ZEND_AST_GREATER_EQUAL || kind == ZEND_AST_AND || kind == ZEND_AST_OR || kind == ZEND_AST_UNARY_OP || kind == ZEND_AST_UNARY_PLUS || kind == ZEND_AST_UNARY_MINUS || kind == ZEND_AST_CONDITIONAL || kind == ZEND_AST_DIM || kind == ZEND_AST_ARRAY || kind == ZEND_AST_ARRAY_ELEM || kind == ZEND_AST_UNPACK || kind == ZEND_AST_CONST || kind == ZEND_AST_CLASS_CONST || kind == ZEND_AST_CLASS_NAME || kind == ZEND_AST_MAGIC_CONST || kind == ZEND_AST_COALESCE; } /* }}} */ void zend_compile_const_expr_class_const(zend_ast **ast_ptr) /* {{{ */ { zend_ast *ast = *ast_ptr; zend_ast *class_ast = ast->child[0]; zend_ast *const_ast = ast->child[1]; zend_string *class_name; zend_string *const_name = zend_ast_get_str(const_ast); zend_string *name; int fetch_type; if (class_ast->kind != ZEND_AST_ZVAL) { zend_error_noreturn(E_COMPILE_ERROR, "Dynamic class names are not allowed in compile-time class constant references"); } class_name = zend_ast_get_str(class_ast); fetch_type = zend_get_class_fetch_type(class_name); if (ZEND_FETCH_CLASS_STATIC == fetch_type) { zend_error_noreturn(E_COMPILE_ERROR, "\"static::\" is not allowed in compile-time constants"); } if (ZEND_FETCH_CLASS_DEFAULT == fetch_type) { class_name = zend_resolve_class_name_ast(class_ast); } else { zend_string_addref(class_name); } name = zend_concat3( ZSTR_VAL(class_name), ZSTR_LEN(class_name), "::", 2, ZSTR_VAL(const_name), ZSTR_LEN(const_name)); zend_ast_destroy(ast); zend_string_release_ex(class_name, 0); *ast_ptr = zend_ast_create_constant(name, fetch_type | ZEND_FETCH_CLASS_EXCEPTION); } /* }}} */ void zend_compile_const_expr_class_name(zend_ast **ast_ptr) /* {{{ */ { zend_ast *ast = *ast_ptr; zend_ast *class_ast = ast->child[0]; zend_string *class_name = zend_ast_get_str(class_ast); uint32_t fetch_type = zend_get_class_fetch_type(class_name); switch (fetch_type) { case ZEND_FETCH_CLASS_SELF: case ZEND_FETCH_CLASS_PARENT: /* For the const-eval representation store the fetch type instead of the name. */ zend_string_release(class_name); ast->child[0] = NULL; ast->attr = fetch_type; return; case ZEND_FETCH_CLASS_STATIC: zend_error_noreturn(E_COMPILE_ERROR, "static::class cannot be used for compile-time class name resolution"); return; EMPTY_SWITCH_DEFAULT_CASE() } } void zend_compile_const_expr_const(zend_ast **ast_ptr) /* {{{ */ { zend_ast *ast = *ast_ptr; zend_ast *name_ast = ast->child[0]; zend_string *orig_name = zend_ast_get_str(name_ast); zend_bool is_fully_qualified; zval result; zend_string *resolved_name; resolved_name = zend_resolve_const_name( orig_name, name_ast->attr, &is_fully_qualified); if (zend_try_ct_eval_const(&result, resolved_name, is_fully_qualified)) { zend_string_release_ex(resolved_name, 0); zend_ast_destroy(ast); *ast_ptr = zend_ast_create_zval(&result); return; } zend_ast_destroy(ast); *ast_ptr = zend_ast_create_constant(resolved_name, !is_fully_qualified ? IS_CONSTANT_UNQUALIFIED : 0); } /* }}} */ void zend_compile_const_expr_magic_const(zend_ast **ast_ptr) /* {{{ */ { zend_ast *ast = *ast_ptr; /* Other cases already resolved by constant folding */ ZEND_ASSERT(ast->attr == T_CLASS_C); zend_ast_destroy(ast); *ast_ptr = zend_ast_create(ZEND_AST_CONSTANT_CLASS); } /* }}} */ void zend_compile_const_expr(zend_ast **ast_ptr) /* {{{ */ { zend_ast *ast = *ast_ptr; if (ast == NULL || ast->kind == ZEND_AST_ZVAL) { return; } if (!zend_is_allowed_in_const_expr(ast->kind)) { zend_error_noreturn(E_COMPILE_ERROR, "Constant expression contains invalid operations"); } switch (ast->kind) { case ZEND_AST_CLASS_CONST: zend_compile_const_expr_class_const(ast_ptr); break; case ZEND_AST_CLASS_NAME: zend_compile_const_expr_class_name(ast_ptr); break; case ZEND_AST_CONST: zend_compile_const_expr_const(ast_ptr); break; case ZEND_AST_MAGIC_CONST: zend_compile_const_expr_magic_const(ast_ptr); break; default: zend_ast_apply(ast, zend_compile_const_expr); break; } } /* }}} */ void zend_const_expr_to_zval(zval *result, zend_ast *ast) /* {{{ */ { zend_ast *orig_ast = ast; zend_eval_const_expr(&ast); zend_compile_const_expr(&ast); if (ast->kind == ZEND_AST_ZVAL) { ZVAL_COPY_VALUE(result, zend_ast_get_zval(ast)); } else { ZVAL_AST(result, zend_ast_copy(ast)); /* destroy the ast here, it might have been replaced */ zend_ast_destroy(ast); } /* Kill this branch of the original AST, as it was already destroyed. * It would be nice to find a better solution to this problem in the * future. */ orig_ast->kind = 0; } /* }}} */ /* Same as compile_stmt, but with early binding */ void zend_compile_top_stmt(zend_ast *ast) /* {{{ */ { if (!ast) { return; } if (ast->kind == ZEND_AST_STMT_LIST) { zend_ast_list *list = zend_ast_get_list(ast); uint32_t i; for (i = 0; i < list->children; ++i) { zend_compile_top_stmt(list->child[i]); } return; } if (ast->kind == ZEND_AST_FUNC_DECL) { CG(zend_lineno) = ast->lineno; zend_compile_func_decl(NULL, ast, 1); CG(zend_lineno) = ((zend_ast_decl *) ast)->end_lineno; } else if (ast->kind == ZEND_AST_CLASS) { CG(zend_lineno) = ast->lineno; zend_compile_class_decl(ast, 1); CG(zend_lineno) = ((zend_ast_decl *) ast)->end_lineno; } else { zend_compile_stmt(ast); } if (ast->kind != ZEND_AST_NAMESPACE && ast->kind != ZEND_AST_HALT_COMPILER) { zend_verify_namespace(); } } /* }}} */ void zend_compile_stmt(zend_ast *ast) /* {{{ */ { if (!ast) { return; } CG(zend_lineno) = ast->lineno; if ((CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT) && !zend_is_unticked_stmt(ast)) { zend_do_extended_stmt(); } switch (ast->kind) { case ZEND_AST_STMT_LIST: zend_compile_stmt_list(ast); break; case ZEND_AST_GLOBAL: zend_compile_global_var(ast); break; case ZEND_AST_STATIC: zend_compile_static_var(ast); break; case ZEND_AST_UNSET: zend_compile_unset(ast); break; case ZEND_AST_RETURN: zend_compile_return(ast); break; case ZEND_AST_ECHO: zend_compile_echo(ast); break; case ZEND_AST_THROW: zend_compile_throw(ast); break; case ZEND_AST_BREAK: case ZEND_AST_CONTINUE: zend_compile_break_continue(ast); break; case ZEND_AST_GOTO: zend_compile_goto(ast); break; case ZEND_AST_LABEL: zend_compile_label(ast); break; case ZEND_AST_WHILE: zend_compile_while(ast); break; case ZEND_AST_DO_WHILE: zend_compile_do_while(ast); break; case ZEND_AST_FOR: zend_compile_for(ast); break; case ZEND_AST_FOREACH: zend_compile_foreach(ast); break; case ZEND_AST_IF: zend_compile_if(ast); break; case ZEND_AST_SWITCH: zend_compile_switch(ast); break; case ZEND_AST_TRY: zend_compile_try(ast); break; case ZEND_AST_DECLARE: zend_compile_declare(ast); break; case ZEND_AST_FUNC_DECL: case ZEND_AST_METHOD: zend_compile_func_decl(NULL, ast, 0); break; case ZEND_AST_PROP_GROUP: zend_compile_prop_group(ast); break; case ZEND_AST_CLASS_CONST_DECL: zend_compile_class_const_decl(ast); break; case ZEND_AST_USE_TRAIT: zend_compile_use_trait(ast); break; case ZEND_AST_CLASS: zend_compile_class_decl(ast, 0); break; case ZEND_AST_GROUP_USE: zend_compile_group_use(ast); break; case ZEND_AST_USE: zend_compile_use(ast); break; case ZEND_AST_CONST_DECL: zend_compile_const_decl(ast); break; case ZEND_AST_NAMESPACE: zend_compile_namespace(ast); break; case ZEND_AST_HALT_COMPILER: zend_compile_halt_compiler(ast); break; default: { znode result; zend_compile_expr(&result, ast); zend_do_free(&result); } } if (FC(declarables).ticks && !zend_is_unticked_stmt(ast)) { zend_emit_tick(); } } /* }}} */ void zend_compile_expr(znode *result, zend_ast *ast) /* {{{ */ { /* CG(zend_lineno) = ast->lineno; */ CG(zend_lineno) = zend_ast_get_lineno(ast); if (CG(memoize_mode) != ZEND_MEMOIZE_NONE) { zend_compile_memoized_expr(result, ast); return; } switch (ast->kind) { case ZEND_AST_ZVAL: ZVAL_COPY(&result->u.constant, zend_ast_get_zval(ast)); result->op_type = IS_CONST; return; case ZEND_AST_ZNODE: *result = *zend_ast_get_znode(ast); return; case ZEND_AST_VAR: case ZEND_AST_DIM: case ZEND_AST_PROP: case ZEND_AST_STATIC_PROP: case ZEND_AST_CALL: case ZEND_AST_METHOD_CALL: case ZEND_AST_STATIC_CALL: zend_compile_var(result, ast, BP_VAR_R, 0); return; case ZEND_AST_ASSIGN: zend_compile_assign(result, ast); return; case ZEND_AST_ASSIGN_REF: zend_compile_assign_ref(result, ast); return; case ZEND_AST_NEW: zend_compile_new(result, ast); return; case ZEND_AST_CLONE: zend_compile_clone(result, ast); return; case ZEND_AST_ASSIGN_OP: zend_compile_compound_assign(result, ast); return; case ZEND_AST_BINARY_OP: zend_compile_binary_op(result, ast); return; case ZEND_AST_GREATER: case ZEND_AST_GREATER_EQUAL: zend_compile_greater(result, ast); return; case ZEND_AST_UNARY_OP: zend_compile_unary_op(result, ast); return; case ZEND_AST_UNARY_PLUS: case ZEND_AST_UNARY_MINUS: zend_compile_unary_pm(result, ast); return; case ZEND_AST_AND: case ZEND_AST_OR: zend_compile_short_circuiting(result, ast); return; case ZEND_AST_POST_INC: case ZEND_AST_POST_DEC: zend_compile_post_incdec(result, ast); return; case ZEND_AST_PRE_INC: case ZEND_AST_PRE_DEC: zend_compile_pre_incdec(result, ast); return; case ZEND_AST_CAST: zend_compile_cast(result, ast); return; case ZEND_AST_CONDITIONAL: zend_compile_conditional(result, ast); return; case ZEND_AST_COALESCE: zend_compile_coalesce(result, ast); return; case ZEND_AST_ASSIGN_COALESCE: zend_compile_assign_coalesce(result, ast); return; case ZEND_AST_PRINT: zend_compile_print(result, ast); return; case ZEND_AST_EXIT: zend_compile_exit(result, ast); return; case ZEND_AST_YIELD: zend_compile_yield(result, ast); return; case ZEND_AST_YIELD_FROM: zend_compile_yield_from(result, ast); return; case ZEND_AST_INSTANCEOF: zend_compile_instanceof(result, ast); return; case ZEND_AST_INCLUDE_OR_EVAL: zend_compile_include_or_eval(result, ast); return; case ZEND_AST_ISSET: case ZEND_AST_EMPTY: zend_compile_isset_or_empty(result, ast); return; case ZEND_AST_SILENCE: zend_compile_silence(result, ast); return; case ZEND_AST_SHELL_EXEC: zend_compile_shell_exec(result, ast); return; case ZEND_AST_ARRAY: zend_compile_array(result, ast); return; case ZEND_AST_CONST: zend_compile_const(result, ast); return; case ZEND_AST_CLASS_CONST: zend_compile_class_const(result, ast); return; case ZEND_AST_CLASS_NAME: zend_compile_class_name(result, ast); return; case ZEND_AST_ENCAPS_LIST: zend_compile_encaps_list(result, ast); return; case ZEND_AST_MAGIC_CONST: zend_compile_magic_const(result, ast); return; case ZEND_AST_CLOSURE: case ZEND_AST_ARROW_FUNC: zend_compile_func_decl(result, ast, 0); return; default: ZEND_ASSERT(0 /* not supported */); } } /* }}} */ zend_op *zend_compile_var(znode *result, zend_ast *ast, uint32_t type, int by_ref) /* {{{ */ { CG(zend_lineno) = zend_ast_get_lineno(ast); switch (ast->kind) { case ZEND_AST_VAR: return zend_compile_simple_var(result, ast, type, 0); case ZEND_AST_DIM: return zend_compile_dim(result, ast, type); case ZEND_AST_PROP: return zend_compile_prop(result, ast, type, by_ref); case ZEND_AST_STATIC_PROP: return zend_compile_static_prop(result, ast, type, by_ref, 0); case ZEND_AST_CALL: zend_compile_call(result, ast, type); return NULL; case ZEND_AST_METHOD_CALL: zend_compile_method_call(result, ast, type); return NULL; case ZEND_AST_STATIC_CALL: zend_compile_static_call(result, ast, type); return NULL; case ZEND_AST_ZNODE: *result = *zend_ast_get_znode(ast); return NULL; default: if (type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use temporary expression in write context"); } zend_compile_expr(result, ast); return NULL; } } /* }}} */ zend_op *zend_delayed_compile_var(znode *result, zend_ast *ast, uint32_t type, zend_bool by_ref) /* {{{ */ { switch (ast->kind) { case ZEND_AST_VAR: return zend_compile_simple_var(result, ast, type, 1); case ZEND_AST_DIM: return zend_delayed_compile_dim(result, ast, type); case ZEND_AST_PROP: { zend_op *opline = zend_delayed_compile_prop(result, ast, type); if (by_ref) { opline->extended_value |= ZEND_FETCH_REF; } return opline; } case ZEND_AST_STATIC_PROP: return zend_compile_static_prop(result, ast, type, by_ref, 1); default: return zend_compile_var(result, ast, type, 0); } } /* }}} */ void zend_eval_const_expr(zend_ast **ast_ptr) /* {{{ */ { zend_ast *ast = *ast_ptr; zval result; if (!ast) { return; } switch (ast->kind) { case ZEND_AST_BINARY_OP: zend_eval_const_expr(&ast->child[0]); zend_eval_const_expr(&ast->child[1]); if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) { return; } if (!zend_try_ct_eval_binary_op(&result, ast->attr, zend_ast_get_zval(ast->child[0]), zend_ast_get_zval(ast->child[1])) ) { return; } break; case ZEND_AST_GREATER: case ZEND_AST_GREATER_EQUAL: zend_eval_const_expr(&ast->child[0]); zend_eval_const_expr(&ast->child[1]); if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) { return; } zend_ct_eval_greater(&result, ast->kind, zend_ast_get_zval(ast->child[0]), zend_ast_get_zval(ast->child[1])); break; case ZEND_AST_AND: case ZEND_AST_OR: { zend_bool child0_is_true, child1_is_true; zend_eval_const_expr(&ast->child[0]); zend_eval_const_expr(&ast->child[1]); if (ast->child[0]->kind != ZEND_AST_ZVAL) { return; } child0_is_true = zend_is_true(zend_ast_get_zval(ast->child[0])); if (child0_is_true == (ast->kind == ZEND_AST_OR)) { ZVAL_BOOL(&result, ast->kind == ZEND_AST_OR); break; } if (ast->child[1]->kind != ZEND_AST_ZVAL) { return; } child1_is_true = zend_is_true(zend_ast_get_zval(ast->child[1])); if (ast->kind == ZEND_AST_OR) { ZVAL_BOOL(&result, child0_is_true || child1_is_true); } else { ZVAL_BOOL(&result, child0_is_true && child1_is_true); } break; } case ZEND_AST_UNARY_OP: zend_eval_const_expr(&ast->child[0]); if (ast->child[0]->kind != ZEND_AST_ZVAL) { return; } zend_ct_eval_unary_op(&result, ast->attr, zend_ast_get_zval(ast->child[0])); break; case ZEND_AST_UNARY_PLUS: case ZEND_AST_UNARY_MINUS: zend_eval_const_expr(&ast->child[0]); if (ast->child[0]->kind != ZEND_AST_ZVAL) { return; } if (!zend_try_ct_eval_unary_pm(&result, ast->kind, zend_ast_get_zval(ast->child[0]))) { return; } break; case ZEND_AST_COALESCE: /* Set isset fetch indicator here, opcache disallows runtime altering of the AST */ if (ast->child[0]->kind == ZEND_AST_DIM) { ast->child[0]->attr |= ZEND_DIM_IS; } zend_eval_const_expr(&ast->child[0]); if (ast->child[0]->kind != ZEND_AST_ZVAL) { /* ensure everything was compile-time evaluated at least once */ zend_eval_const_expr(&ast->child[1]); return; } if (Z_TYPE_P(zend_ast_get_zval(ast->child[0])) == IS_NULL) { zend_eval_const_expr(&ast->child[1]); *ast_ptr = ast->child[1]; ast->child[1] = NULL; zend_ast_destroy(ast); } else { *ast_ptr = ast->child[0]; ast->child[0] = NULL; zend_ast_destroy(ast); } return; case ZEND_AST_CONDITIONAL: { zend_ast **child, *child_ast; zend_eval_const_expr(&ast->child[0]); if (ast->child[0]->kind != ZEND_AST_ZVAL) { /* ensure everything was compile-time evaluated at least once */ if (ast->child[1]) { zend_eval_const_expr(&ast->child[1]); } zend_eval_const_expr(&ast->child[2]); return; } child = &ast->child[2 - zend_is_true(zend_ast_get_zval(ast->child[0]))]; if (*child == NULL) { child--; } child_ast = *child; *child = NULL; zend_ast_destroy(ast); *ast_ptr = child_ast; zend_eval_const_expr(ast_ptr); return; } case ZEND_AST_DIM: { /* constant expression should be always read context ... */ zval *container, *dim; if (ast->child[1] == NULL) { zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading"); } if (ast->attr & ZEND_DIM_ALTERNATIVE_SYNTAX) { ast->attr &= ~ZEND_DIM_ALTERNATIVE_SYNTAX; /* remove flag to avoid duplicate warning */ zend_error(E_DEPRECATED, "Array and string offset access syntax with curly braces is deprecated"); } /* Set isset fetch indicator here, opcache disallows runtime altering of the AST */ if (ast->attr & ZEND_DIM_IS && ast->child[0]->kind == ZEND_AST_DIM) { ast->child[0]->attr |= ZEND_DIM_IS; } zend_eval_const_expr(&ast->child[0]); zend_eval_const_expr(&ast->child[1]); if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) { return; } container = zend_ast_get_zval(ast->child[0]); dim = zend_ast_get_zval(ast->child[1]); if (Z_TYPE_P(container) == IS_ARRAY) { zval *el; if (Z_TYPE_P(dim) == IS_LONG) { el = zend_hash_index_find(Z_ARR_P(container), Z_LVAL_P(dim)); if (el) { ZVAL_COPY(&result, el); } else { return; } } else if (Z_TYPE_P(dim) == IS_STRING) { el = zend_symtable_find(Z_ARR_P(container), Z_STR_P(dim)); if (el) { ZVAL_COPY(&result, el); } else { return; } } else { return; /* warning... handle at runtime */ } } else if (Z_TYPE_P(container) == IS_STRING) { zend_long offset; zend_uchar c; if (Z_TYPE_P(dim) == IS_LONG) { offset = Z_LVAL_P(dim); } else if (Z_TYPE_P(dim) != IS_STRING || is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), &offset, NULL, 1) != IS_LONG) { return; } if (offset < 0 || (size_t)offset >= Z_STRLEN_P(container)) { return; } c = (zend_uchar) Z_STRVAL_P(container)[offset]; ZVAL_INTERNED_STR(&result, ZSTR_CHAR(c)); } else if (Z_TYPE_P(container) <= IS_FALSE) { ZVAL_NULL(&result); } else { return; } break; } case ZEND_AST_ARRAY: if (!zend_try_ct_eval_array(&result, ast)) { return; } break; case ZEND_AST_MAGIC_CONST: if (!zend_try_ct_eval_magic_const(&result, ast)) { return; } break; case ZEND_AST_CONST: { zend_ast *name_ast = ast->child[0]; zend_bool is_fully_qualified; zend_string *resolved_name = zend_resolve_const_name( zend_ast_get_str(name_ast), name_ast->attr, &is_fully_qualified); if (!zend_try_ct_eval_const(&result, resolved_name, is_fully_qualified)) { zend_string_release_ex(resolved_name, 0); return; } zend_string_release_ex(resolved_name, 0); break; } case ZEND_AST_CLASS_CONST: { zend_ast *class_ast; zend_ast *name_ast; zend_string *resolved_name; zend_eval_const_expr(&ast->child[0]); zend_eval_const_expr(&ast->child[1]); class_ast = ast->child[0]; name_ast = ast->child[1]; if (class_ast->kind != ZEND_AST_ZVAL || name_ast->kind != ZEND_AST_ZVAL) { return; } resolved_name = zend_resolve_class_name_ast(class_ast); if (!zend_try_ct_eval_class_const(&result, resolved_name, zend_ast_get_str(name_ast))) { zend_string_release_ex(resolved_name, 0); return; } zend_string_release_ex(resolved_name, 0); break; } case ZEND_AST_CLASS_NAME: { zend_ast *class_ast = ast->child[0]; if (!zend_try_compile_const_expr_resolve_class_name(&result, class_ast)) { return; } break; } default: return; } zend_ast_destroy(ast); *ast_ptr = zend_ast_create_zval(&result); } /* }}} */