diff options
Diffstat (limited to 'Zend/zend_execute_API.c')
-rw-r--r-- | Zend/zend_execute_API.c | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/Zend/zend_execute_API.c b/Zend/zend_execute_API.c new file mode 100644 index 0000000000..9834499195 --- /dev/null +++ b/Zend/zend_execute_API.c @@ -0,0 +1,708 @@ +/* + +----------------------------------------------------------------------+ + | Zend Engine | + +----------------------------------------------------------------------+ + | Copyright (c) 1998-2000 Zend Technologies Ltd. (http://www.zend.com) | + +----------------------------------------------------------------------+ + | This source file is subject to version 0.92 of the Zend license, | + | that is bundled with this package in the file LICENSE, and is | + | available at through the world-wide-web at | + | http://www.zend.com/license/0_92.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 <andi@zend.com> | + | Zeev Suraski <zeev@zend.com> | + +----------------------------------------------------------------------+ +*/ + + +#include <stdio.h> +#include <signal.h> + +#include "zend.h" +#include "zend_compile.h" +#include "zend_execute.h" +#include "zend_API.h" +#include "zend_ptr_stack.h" +#include "zend_constants.h" +#include "zend_extensions.h" +#include "zend_execute_locks.h" +#if HAVE_SYS_TIME_H +#include <sys/time.h> +#endif + + +ZEND_API void (*zend_execute)(zend_op_array *op_array ELS_DC); + +#ifdef ZEND_WIN32 +#include <process.h> +/* true global */ +static WNDCLASS wc; +static HWND timeout_window; +static HANDLE timeout_thread_event; +static DWORD timeout_thread_id; +static int timeout_thread_initialized=0; +#endif + + +#if ZEND_DEBUG +static void (*original_sigsegv_handler)(int); +static void zend_handle_sigsegv(int dummy) +{ + fflush(stdout); + fflush(stderr); + if (original_sigsegv_handler==zend_handle_sigsegv) { + signal(SIGSEGV, original_sigsegv_handler); + } else { + signal(SIGSEGV, SIG_DFL); + } + { + ELS_FETCH(); + + fprintf(stderr, "SIGSEGV caught on opcode %d on opline %d of %s() at %s:%d\n\n", + active_opline->opcode, + active_opline-EG(active_op_array)->opcodes, + get_active_function_name(), + zend_get_executed_filename(ELS_C), + zend_get_executed_lineno(ELS_C)); + } + if (original_sigsegv_handler!=zend_handle_sigsegv) { + original_sigsegv_handler(dummy); + } +} +#endif + + +static void zend_extension_activator(zend_extension *extension) +{ + if (extension->activate) { + extension->activate(); + } +} + + +static void zend_extension_deactivator(zend_extension *extension) +{ + if (extension->deactivate) { + extension->deactivate(); + } +} + + +static int is_not_internal_function(zend_function *function) +{ + return(function->type != ZEND_INTERNAL_FUNCTION); +} + + +static int is_not_internal_class(zend_class_entry *ce) +{ + return(ce->type != ZEND_INTERNAL_CLASS); +} + + +void init_executor(CLS_D ELS_DC) +{ + INIT_ZVAL(EG(uninitialized_zval)); + INIT_ZVAL(EG(error_zval)); + EG(uninitialized_zval_ptr)=&EG(uninitialized_zval); + EG(error_zval_ptr)=&EG(error_zval); + zend_ptr_stack_init(&EG(arg_types_stack)); +/* destroys stack frame, therefore makes core dumps worthless */ +#if 0&&ZEND_DEBUG + original_sigsegv_handler = signal(SIGSEGV, zend_handle_sigsegv); +#endif + EG(return_value_ptr_ptr) = &EG(global_return_value_ptr); + EG(global_return_value_ptr) = NULL; + + EG(symtable_cache_ptr) = EG(symtable_cache)-1; + EG(symtable_cache_limit)=EG(symtable_cache)+SYMTABLE_CACHE_SIZE-1; + EG(no_extensions)=0; + + EG(function_table) = CG(function_table); + EG(class_table) = CG(class_table); + + EG(in_execution) = 0; + + zend_ptr_stack_init(&EG(argument_stack)); + + zend_hash_init(&EG(symbol_table), 50, NULL, ZVAL_PTR_DTOR, 0); + EG(active_symbol_table) = &EG(symbol_table); + + zend_llist_apply(&zend_extensions, (void (*)(void *)) zend_extension_activator); + EG(opline_ptr) = NULL; + EG(garbage_ptr) = 0; + + zend_hash_init(&EG(included_files), 5, NULL, NULL, 0); + + EG(ticks_count) = 0; + + EG(user_error_handler) = NULL; + + zend_ptr_stack_init(&EG(user_error_handlers)); + + EG(orig_error_reporting) = EG(error_reporting); + +#ifdef ZEND_WIN32 + EG(timed_out) = 0; +#endif +} + + +void shutdown_executor(ELS_D) +{ + zend_ptr_stack_destroy(&EG(arg_types_stack)); + + while (EG(symtable_cache_ptr)>=EG(symtable_cache)) { + zend_hash_destroy(*EG(symtable_cache_ptr)); + efree(*EG(symtable_cache_ptr)); + EG(symtable_cache_ptr)--; + } + zend_llist_apply(&zend_extensions, (void (*)(void *)) zend_extension_deactivator); + + zend_hash_destroy(&EG(symbol_table)); + + while (EG(garbage_ptr)--) { + if (EG(garbage)[EG(garbage_ptr)]->refcount==1) { + zval_ptr_dtor(&EG(garbage)[EG(garbage_ptr)]); + } + } + + zend_ptr_stack_destroy(&EG(argument_stack)); + + /* Destroy all op arrays */ + zend_hash_apply(EG(function_table), (int (*)(void *)) is_not_internal_function); + zend_hash_apply(EG(class_table), (int (*)(void *)) is_not_internal_class); + + zend_destroy_rsrc_list(ELS_C); /* must be destroyed after the main symbol table and + * op arrays are destroyed. + */ + + clean_non_persistent_constants(); +#if ZEND_DEBUG + signal(SIGSEGV, original_sigsegv_handler); +#endif + + zend_hash_destroy(&EG(included_files)); + + if (EG(user_error_handler)) { + zval_dtor(EG(user_error_handler)); + FREE_ZVAL(EG(user_error_handler)); + } + + zend_ptr_stack_clean(&EG(user_error_handlers), ZVAL_DESTRUCTOR, 1); + zend_ptr_stack_destroy(&EG(user_error_handlers)); + + EG(error_reporting) = EG(orig_error_reporting); +} + + +ZEND_API char *get_active_function_name() +{ + ELS_FETCH(); + + switch(EG(function_state_ptr)->function->type) { + case ZEND_USER_FUNCTION: { + char *function_name = ((zend_op_array *) EG(function_state_ptr)->function)->function_name; + + if (function_name) { + return function_name; + } else { + return "main"; + } + } + break; + case ZEND_INTERNAL_FUNCTION: + return ((zend_internal_function *) EG(function_state_ptr)->function)->function_name; + break; + default: + return NULL; + } +} + + +ZEND_API char *zend_get_executed_filename(ELS_D) +{ + if (EG(active_op_array)) { + return EG(active_op_array)->filename; + } else { + return "[no active file]"; + } +} + + +ZEND_API uint zend_get_executed_lineno(ELS_D) +{ + if (EG(opline_ptr)) { + return active_opline->lineno; + } else { + return 0; + } +} + + +ZEND_API zend_bool zend_is_executing() +{ + ELS_FETCH(); + + return EG(in_execution); +} + + +ZEND_API void _zval_ptr_dtor(zval **zval_ptr ZEND_FILE_LINE_DC) +{ +#if DEBUG_ZEND>=2 + printf("Reducing refcount for %x (%x): %d->%d\n", *zval_ptr, zval_ptr, (*zval_ptr)->refcount, (*zval_ptr)->refcount-1); +#endif + (*zval_ptr)->refcount--; + if ((*zval_ptr)->refcount==0) { + zval_dtor(*zval_ptr); + safe_free_zval_ptr(*zval_ptr); + } else if (((*zval_ptr)->refcount == 1) && ((*zval_ptr)->type != IS_OBJECT)) { + (*zval_ptr)->is_ref = 0; + } +} + + +ZEND_API int zend_is_true(zval *op) +{ + return i_zend_is_true(op); +} + + +ZEND_API int zval_update_constant(zval **pp, void *arg) +{ + zval *p = *pp; + zend_bool inline_change = (zend_bool) (unsigned long) arg; + + if (p->type == IS_CONSTANT) { + zval c; + int refcount; + + SEPARATE_ZVAL(pp); + p = *pp; + + refcount = p->refcount; + + if (!zend_get_constant(p->value.str.val, p->value.str.len, &c)) { + zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'", + p->value.str.val, + p->value.str.val); + p->type = IS_STRING; + if (!inline_change) { + zval_copy_ctor(p); + } + } else { + if (inline_change) { + STR_FREE(p->value.str.val); + } + *p = c; + } + INIT_PZVAL(p); + p->refcount = refcount; + } else if (p->type == IS_CONSTANT_ARRAY) { + SEPARATE_ZVAL(pp); + p = *pp; + p->type = IS_ARRAY; + zend_hash_apply_with_argument(p->value.ht, (int (*)(void *,void *)) zval_update_constant, (void *) 1); + } + return 0; +} + + +int call_user_function(HashTable *function_table, zval *object, zval *function_name, zval *retval_ptr, int param_count, zval *params[]) +{ + zval ***params_array = (zval ***) emalloc(sizeof(zval **)*param_count); + int i; + int ex_retval; + zval *local_retval_ptr; + + for (i=0; i<param_count; i++) { + params_array[i] = ¶ms[i]; + } + ex_retval = call_user_function_ex(function_table, object, function_name, &local_retval_ptr, param_count, params_array, 1, NULL); + if (local_retval_ptr) { + COPY_PZVAL_TO_ZVAL(*retval_ptr, local_retval_ptr); + } else { + INIT_ZVAL(*retval_ptr); + } + efree(params_array); + return ex_retval; +} + + +int call_user_function_ex(HashTable *function_table, zval *object, zval *function_name, zval **retval_ptr_ptr, int param_count, zval **params[], int no_separation, HashTable *symbol_table) +{ + int i; + zval **original_return_value; + HashTable *calling_symbol_table; + zend_function_state function_state; + zend_function_state *original_function_state_ptr; + zend_op_array *original_op_array; + zend_op **original_opline_ptr; + ELS_FETCH(); + + *retval_ptr_ptr = NULL; + + if (function_name->type==IS_ARRAY) { /* assume array($obj, $name) couple */ + zval **tmp_object_ptr, **tmp_real_function_name; + + if (zend_hash_index_find(function_name->value.ht, 0, (void **) &tmp_object_ptr)==FAILURE) { + return FAILURE; + } + if (zend_hash_index_find(function_name->value.ht, 1, (void **) &tmp_real_function_name)==FAILURE) { + return FAILURE; + } + function_name = *tmp_real_function_name; + SEPARATE_ZVAL_IF_NOT_REF(tmp_object_ptr); + object = *tmp_object_ptr; + object->is_ref = 1; + } + + if (object) { + if (object->type != IS_OBJECT) { + return FAILURE; + } + function_table = &object->value.obj.ce->function_table; + } + + if (function_name->type!=IS_STRING) { + return FAILURE; + } + + original_function_state_ptr = EG(function_state_ptr); + zend_str_tolower(function_name->value.str.val, function_name->value.str.len); + if (zend_hash_find(function_table, function_name->value.str.val, function_name->value.str.len+1, (void **) &function_state.function)==FAILURE) { + return FAILURE; + } + + for (i=0; i<param_count; i++) { + zval *param; + + if (function_state.function->common.arg_types + && i<function_state.function->common.arg_types[0] + && function_state.function->common.arg_types[i+1]==BYREF_FORCE + && !PZVAL_IS_REF(*params[i])) { + if ((*params[i])->refcount>1) { + zval *new_zval; + + if (no_separation) { + return FAILURE; + } + ALLOC_ZVAL(new_zval); + *new_zval = **params[i]; + zval_copy_ctor(new_zval); + new_zval->refcount = 1; + (*params[i])->refcount--; + *params[i] = new_zval; + } + (*params[i])->refcount++; + (*params[i])->is_ref = 1; + param = *params[i]; + } else if (*params[i] != &EG(uninitialized_zval)) { + (*params[i])->refcount++; + param = *params[i]; + } else { + ALLOC_ZVAL(param); + *param = **(params[i]); + INIT_PZVAL(param); + } + zend_ptr_stack_push(&EG(argument_stack), param); + } + + zend_ptr_stack_n_push(&EG(argument_stack), 2, (void *) (long) param_count, NULL); + + if (function_state.function->type == ZEND_USER_FUNCTION) { + calling_symbol_table = EG(active_symbol_table); + if (symbol_table) { + EG(active_symbol_table) = symbol_table; + } else { + ALLOC_HASHTABLE(EG(active_symbol_table)); + zend_hash_init(EG(active_symbol_table), 0, NULL, ZVAL_PTR_DTOR, 0); + } + if (object) { + zval *dummy, **this_ptr; + + ALLOC_ZVAL(dummy); + INIT_ZVAL(*dummy); + + zend_hash_update(EG(active_symbol_table), "this", sizeof("this"), &dummy, sizeof(zval *), (void **) &this_ptr); + zend_assign_to_variable_reference(NULL, this_ptr, &object, NULL ELS_CC); + } + original_return_value = EG(return_value_ptr_ptr); + original_op_array = EG(active_op_array); + EG(return_value_ptr_ptr) = retval_ptr_ptr; + EG(active_op_array) = (zend_op_array *) function_state.function; + original_opline_ptr = EG(opline_ptr); + zend_execute(EG(active_op_array) ELS_CC); + if (!symbol_table) { + zend_hash_destroy(EG(active_symbol_table)); + FREE_HASHTABLE(EG(active_symbol_table)); + } + EG(active_symbol_table) = calling_symbol_table; + EG(active_op_array) = original_op_array; + EG(return_value_ptr_ptr)=original_return_value; + EG(opline_ptr) = original_opline_ptr; + } else { + ALLOC_INIT_ZVAL(*retval_ptr_ptr); + ((zend_internal_function *) function_state.function)->handler(param_count, *retval_ptr_ptr, object, 1 ELS_CC); + INIT_PZVAL(*retval_ptr_ptr); + } + zend_ptr_stack_clear_multiple(ELS_C); + EG(function_state_ptr) = original_function_state_ptr; + + return SUCCESS; +} + + +ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name CLS_DC ELS_DC) +{ + zval pv; + zend_op_array *new_op_array; + zend_op_array *original_active_op_array = EG(active_op_array); + zend_function_state *original_function_state_ptr = EG(function_state_ptr); + int original_handle_op_arrays; + int retval; + + if (retval_ptr) { + pv.value.str.len = strlen(str)+sizeof("return ;")-1; + pv.value.str.val = emalloc(pv.value.str.len+1); + strcpy(pv.value.str.val, "return "); + strcat(pv.value.str.val, str); + strcat(pv.value.str.val, " ;"); + } else { + pv.value.str.len = strlen(str); + pv.value.str.val = estrndup(str, pv.value.str.len); + } + pv.type = IS_STRING; + + /*printf("Evaluating '%s'\n", pv.value.str.val);*/ + + original_handle_op_arrays = CG(handle_op_arrays); + CG(handle_op_arrays) = 0; + new_op_array = compile_string(&pv, string_name CLS_CC); + CG(handle_op_arrays) = original_handle_op_arrays; + + if (new_op_array) { + zval *local_retval_ptr=NULL; + zval **original_return_value_ptr_ptr = EG(return_value_ptr_ptr); + zend_op **original_opline_ptr = EG(opline_ptr); + + EG(return_value_ptr_ptr) = &local_retval_ptr; + EG(active_op_array) = new_op_array; + EG(no_extensions)=1; + + zend_execute(new_op_array ELS_CC); + + if (local_retval_ptr) { + if (retval_ptr) { + COPY_PZVAL_TO_ZVAL(*retval_ptr, local_retval_ptr); + } else { + zval_ptr_dtor(&local_retval_ptr); + } + } else { + if (retval_ptr) { + INIT_ZVAL(*retval_ptr); + } + } + + EG(no_extensions)=0; + EG(opline_ptr) = original_opline_ptr; + EG(active_op_array) = original_active_op_array; + EG(function_state_ptr) = original_function_state_ptr; + destroy_op_array(new_op_array); + efree(new_op_array); + EG(return_value_ptr_ptr) = original_return_value_ptr_ptr; + retval = SUCCESS; + } else { + retval = FAILURE; + } + zval_dtor(&pv); + return retval; +} + + + +#if SUPPORT_INTERACTIVE +void execute_new_code(CLS_D) +{ + ELS_FETCH(); + + if (!EG(interactive) + || CG(active_op_array)->backpatch_count>0 + || CG(active_op_array)->function_name + || CG(active_op_array)->type!=ZEND_USER_FUNCTION) { + return; + } + CG(active_op_array)->start_op_number = CG(active_op_array)->last_executed_op_number; + CG(active_op_array)->end_op_number = CG(active_op_array)->last; + EG(active_op_array) = CG(active_op_array); + zend_execute(CG(active_op_array) ELS_CC); + zval_ptr_dtor(EG(return_value_ptr_ptr)); + CG(active_op_array)->start_op_number = CG(active_op_array)->last_executed_op_number; +} +#endif + + +ZEND_API void zend_timeout(int dummy) +{ + ELS_FETCH(); + + /* is there any point in this? we're terminating the request anyway... + PLS_FETCH(); + + PG(connection_status) |= PHP_CONNECTION_TIMEOUT; + */ + zend_error(E_ERROR, "Maximum execution time of %d second%s exceeded", + EG(timeout_seconds), EG(timeout_seconds) == 1 ? "" : "s"); +} + + +#ifdef ZEND_WIN32 +static LRESULT CALLBACK zend_timeout_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) +{ + switch (message) { + case WM_DESTROY: + PostQuitMessage(0); + break; + case WM_REGISTER_ZEND_TIMEOUT: + /* wParam is the thread id pointer, lParam is the timeout amount in seconds */ + if (lParam==0) { + KillTimer(timeout_window, wParam); + } else { + SetTimer(timeout_window, wParam, lParam*1000, NULL); + } + break; + case WM_UNREGISTER_ZEND_TIMEOUT: + /* wParam is the thread id pointer */ + KillTimer(timeout_window, wParam); + break; + case WM_TIMER: { +#ifdef ZTS + zend_executor_globals *executor_globals; + + executor_globals = ts_resource_ex(executor_globals_id, &wParam); + if (!executor_globals) { + /* Thread died before receiving its timeout? */ + break; + } +#endif + KillTimer(timeout_window, wParam); + EG(timed_out) = 1; + } + break; + default: + return DefWindowProc(hWnd,message,wParam,lParam); + } + return 0; +} + + + +static unsigned __stdcall timeout_thread_proc(void *pArgs) +{ + MSG message; + + wc.style=0; + wc.lpfnWndProc = zend_timeout_WndProc; + wc.cbClsExtra=0; + wc.cbWndExtra=0; + wc.hInstance=NULL; + wc.hIcon=NULL; + wc.hCursor=NULL; + wc.hbrBackground=(HBRUSH)(COLOR_BACKGROUND + 5); + wc.lpszMenuName=NULL; + wc.lpszClassName = "Zend Timeout Window"; + if(!RegisterClass(&wc)) { + return -1; + } + timeout_window = CreateWindow(wc.lpszClassName, wc.lpszClassName, 0, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, NULL, NULL); + SetEvent(timeout_thread_event); + while (GetMessage(&message, NULL, 0, 0)) { + SendMessage(timeout_window, message.message, message.wParam, message.lParam); + if (message.message == WM_QUIT) { + break; + } + } + DestroyWindow(timeout_window); + UnregisterClass(wc.lpszClassName, NULL); + return 0; +} + + +void zend_init_timeout_thread() +{ + timeout_thread_event = CreateEvent(NULL, FALSE, FALSE, NULL); + _beginthreadex(NULL, 0, timeout_thread_proc, NULL, 0, &timeout_thread_id); + WaitForSingleObject(timeout_thread_event, INFINITE); +} + + +void zend_shutdown_timeout_thread() +{ + if (!timeout_thread_initialized) { + return; + } + PostThreadMessage(timeout_thread_id, WM_QUIT, 0, 0); +} + +#endif + +/* This one doesn't exists on QNX */ +#ifndef SIGPROF +#define SIGPROF 27 +#endif + +void zend_set_timeout(long seconds) +{ + ELS_FETCH(); + + EG(timeout_seconds) = seconds; +#ifdef ZEND_WIN32 + if (timeout_thread_initialized==0 && InterlockedIncrement(&timeout_thread_initialized)==1) { + /* We start up this process-wide thread here and not in zend_startup(), because if Zend + * is initialized inside a DllMain(), you're not supposed to start threads from it. + */ + zend_init_timeout_thread(); + } + PostThreadMessage(timeout_thread_id, WM_REGISTER_ZEND_TIMEOUT, (WPARAM) GetCurrentThreadId(), (LPARAM) seconds); +#else +# ifdef HAVE_SETITIMER + { + struct itimerval t_r; /* timeout requested */ + sigset_t sigset; + + t_r.it_value.tv_sec = seconds; + t_r.it_value.tv_usec = t_r.it_interval.tv_sec = t_r.it_interval.tv_usec = 0; + + setitimer(ITIMER_PROF, &t_r, NULL); + signal(SIGPROF, zend_timeout); + sigemptyset(&sigset); + sigaddset(&sigset, SIGPROF); + sigprocmask(SIG_UNBLOCK,&sigset,NULL); + } +# endif +#endif +} + + +void zend_unset_timeout(void) +{ + ELS_FETCH(); + +#ifdef ZEND_WIN32 + PostThreadMessage(timeout_thread_id, WM_UNREGISTER_ZEND_TIMEOUT, (WPARAM) GetCurrentThreadId(), (LPARAM) 0); +#else +# ifdef HAVE_SETITIMER + { + struct itimerval no_timeout; + + no_timeout.it_value.tv_sec = no_timeout.it_value.tv_usec = no_timeout.it_interval.tv_sec = no_timeout.it_interval.tv_usec = 0; + + setitimer(ITIMER_PROF, &no_timeout, NULL); + } +# endif +#endif +} |