diff options
Diffstat (limited to 'gdb/jv-lang.c')
| -rw-r--r-- | gdb/jv-lang.c | 1088 |
1 files changed, 1088 insertions, 0 deletions
diff --git a/gdb/jv-lang.c b/gdb/jv-lang.c new file mode 100644 index 00000000000..a98147aaf49 --- /dev/null +++ b/gdb/jv-lang.c @@ -0,0 +1,1088 @@ +/* Java language support routines for GDB, the GNU debugger. + Copyright 1997, 1998, 1999 Free Software Foundation, Inc. + +This file is part of GDB. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "expression.h" +#include "parser-defs.h" +#include "language.h" +#include "gdbtypes.h" +#include "symtab.h" +#include "symfile.h" +#include "objfiles.h" +#include "gdb_string.h" +#include "value.h" +#include "c-lang.h" +#include "jv-lang.h" +#include "gdbcore.h" +#include <ctype.h> + +struct type *java_int_type; +struct type *java_byte_type; +struct type *java_short_type; +struct type *java_long_type; +struct type *java_boolean_type; +struct type *java_char_type; +struct type *java_float_type; +struct type *java_double_type; +struct type *java_void_type; + +static int java_demangled_signature_length PARAMS ((char*)); +static void java_demangled_signature_copy PARAMS ((char*, char*)); + +static void java_emit_char PARAMS ((int c, GDB_FILE *stream, int quoter)); + +/* This objfile contains symtabs that have been dynamically created + to record dynamically loaded Java classes and dynamically + compiled java methods. */ + +static struct objfile *dynamics_objfile = NULL; + +static struct type *java_link_class_type PARAMS ((struct type *, value_ptr)); + +static struct objfile * +get_dynamics_objfile () +{ + if (dynamics_objfile == NULL) + { + dynamics_objfile = allocate_objfile (NULL, 0, 0, 0); + } + return dynamics_objfile; +} + +#if 1 +/* symtab contains classes read from the inferior. */ + +static struct symtab *class_symtab = NULL; + +/* Maximum number of class in class_symtab before relocation is needed. */ + +static int class_symtab_space; + +struct symtab * +get_java_class_symtab () +{ + if (class_symtab == NULL) + { + struct objfile *objfile = get_dynamics_objfile(); + struct blockvector *bv; + struct block *bl; + class_symtab = allocate_symtab ("<java-classes>", objfile); + class_symtab->language = language_java; + bv = (struct blockvector *) + obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector)); + BLOCKVECTOR_NBLOCKS (bv) = 1; + BLOCKVECTOR (class_symtab) = bv; + + /* Allocate dummy STATIC_BLOCK. */ + bl = (struct block *) + obstack_alloc (&objfile->symbol_obstack, sizeof (struct block)); + BLOCK_NSYMS (bl) = 0; + BLOCK_START (bl) = 0; + BLOCK_END (bl) = 0; + BLOCK_FUNCTION (bl) = NULL; + BLOCK_SUPERBLOCK (bl) = NULL; + BLOCK_GCC_COMPILED (bl) = 0; + BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl; + + /* Allocate GLOBAL_BLOCK. This has to be relocatable. */ + class_symtab_space = 128; + bl = (struct block *) + mmalloc (objfile->md, + sizeof (struct block) + + ((class_symtab_space - 1) * sizeof (struct symbol *))); + *bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); + BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl; + class_symtab->free_ptr = (char *) bl; + } + return class_symtab; +} + +static void +add_class_symtab_symbol (sym) + struct symbol *sym; +{ + struct symtab *symtab = get_java_class_symtab (); + struct blockvector *bv = BLOCKVECTOR (symtab); + struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); + if (BLOCK_NSYMS (bl) >= class_symtab_space) + { + /* Need to re-allocate. */ + class_symtab_space *= 2; + bl = (struct block *) + mrealloc (symtab->objfile->md, bl, + sizeof (struct block) + + ((class_symtab_space - 1) * sizeof (struct symbol *))); + class_symtab->free_ptr = (char *) bl; + BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl; + } + + BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym; + BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1; +} + +static struct symbol * add_class_symbol PARAMS ((struct type *type, CORE_ADDR addr)); + +static struct symbol * +add_class_symbol (type, addr) + struct type *type; + CORE_ADDR addr; +{ + struct symbol *sym; + sym = (struct symbol *) + obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol)); + memset (sym, 0, sizeof (struct symbol)); + SYMBOL_LANGUAGE (sym) = language_java; + SYMBOL_NAME (sym) = TYPE_TAG_NAME (type); + SYMBOL_CLASS (sym) = LOC_TYPEDEF; + /* SYMBOL_VALUE (sym) = valu;*/ + SYMBOL_TYPE (sym) = type; + SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; + SYMBOL_VALUE_ADDRESS (sym) = addr; + return sym; +} +#endif + +struct type * +java_lookup_class (name) + char *name; +{ + struct symbol *sym; + sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE, + (int *) 0, (struct symtab **) NULL); + if (sym != NULL) + return SYMBOL_TYPE (sym); +#if 0 + CORE_ADDR addr; + if (called from parser) + { + call lookup_class (or similar) in inferior; + if not found: + return NULL; + addr = found in inferior; + } + else + addr = 0; + struct type *type; + type = alloc_type (objfile); + TYPE_CODE (type) = TYPE_CODE_STRUCT; + INIT_CPLUS_SPECIFIC (type); + TYPE_TAG_NAME (type) = obsavestring (name, strlen(name), &objfile->type_obstack); + TYPE_FLAGS (type) |= TYPE_FLAG_STUB; + TYPE ? = addr; + return type; +#else + /* FIXME - should search inferior's symbol table. */ + return NULL; +#endif +} + +/* Return a nul-terminated string (allocated on OBSTACK) for + a name given by NAME (which has type Utf8Const*). */ + +char * +get_java_utf8_name (obstack, name) + struct obstack *obstack; + value_ptr name; +{ + char *chrs; + value_ptr temp = name; + int name_length; + CORE_ADDR data_addr; + temp = value_struct_elt (&temp, NULL, "length", NULL, "structure"); + name_length = (int) value_as_long (temp); + data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp) + + TYPE_LENGTH (VALUE_TYPE (temp)); + chrs = obstack_alloc (obstack, name_length+1); + chrs [name_length] = '\0'; + read_memory_section (data_addr, chrs, name_length, NULL); + return chrs; +} + +value_ptr +java_class_from_object (obj_val) + value_ptr obj_val; +{ + /* This is all rather inefficient, since the offsets of vtable and + class are fixed. FIXME */ + value_ptr vtable_val; + + if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR + && TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0) + obj_val = value_at (get_java_object_type (), + value_as_pointer (obj_val), NULL); + + vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure"); + return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure"); +} + +/* Check if CLASS_IS_PRIMITIVE(value of clas): */ +int +java_class_is_primitive (clas) + value_ptr clas; +{ + value_ptr vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct"); + CORE_ADDR i = value_as_pointer (vtable); + return (int) (i & 0x7fffffff) == (int) 0x7fffffff; +} + +/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */ + +struct type * +type_from_class (clas) + value_ptr clas; +{ + struct type *type; + char *name; + value_ptr temp; + struct objfile *objfile; + value_ptr utf8_name; + char *nptr; + CORE_ADDR addr; + struct block *bl; + int i; + int is_array = 0; + + type = check_typedef (VALUE_TYPE (clas)); + if (TYPE_CODE (type) == TYPE_CODE_PTR) + { + if (value_logical_not (clas)) + return NULL; + clas = value_ind (clas); + } + addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas); + +#if 0 + get_java_class_symtab (); + bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK); + for (i = BLOCK_NSYMS (bl); --i >= 0; ) + { + struct symbol *sym = BLOCK_SYM (bl, i); + if (SYMBOL_VALUE_ADDRESS (sym) == addr) + return SYMBOL_TYPE (sym); + } +#endif + + objfile = get_dynamics_objfile(); + if (java_class_is_primitive (clas)) + { + value_ptr sig; + temp = clas; + sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure"); + return java_primitive_type (value_as_long (sig)); + } + + /* Get Class name. */ + /* if clasloader non-null, prepend loader address. FIXME */ + temp = clas; + utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure"); + name = get_java_utf8_name (&objfile->type_obstack, utf8_name); + for (nptr = name; *nptr != 0; nptr++) + { + if (*nptr == '/') + *nptr = '.'; + } + + type = java_lookup_class (name); + if (type != NULL) + return type; + + type = alloc_type (objfile); + TYPE_CODE (type) = TYPE_CODE_STRUCT; + INIT_CPLUS_SPECIFIC (type); + + if (name[0] == '[') + { + char *signature = name; + int namelen = java_demangled_signature_length (signature); + if (namelen > strlen (name)) + name = obstack_alloc (&objfile->type_obstack, namelen+1); + java_demangled_signature_copy (name, signature); + name[namelen] = '\0'; + is_array = 1; + temp = clas; + /* Set array element type. */ + temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure"); + VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas)); + TYPE_TARGET_TYPE (type) = type_from_class (temp); + } + + ALLOCATE_CPLUS_STRUCT_TYPE (type); + TYPE_TAG_NAME (type) = name; + + add_class_symtab_symbol (add_class_symbol (type, addr)); + return java_link_class_type (type, clas); +} + +/* Fill in class TYPE with data from the CLAS value. */ + +struct type * +java_link_class_type (type, clas) + struct type *type; + value_ptr clas; +{ + value_ptr temp; + char *unqualified_name; + char *name = TYPE_TAG_NAME (type); + int ninterfaces, nfields, nmethods; + int type_is_object = 0; + struct fn_field *fn_fields; + struct fn_fieldlist *fn_fieldlists; + value_ptr fields, field, method, methods; + int i, j; + struct objfile *objfile = get_dynamics_objfile(); + struct type *tsuper; + + unqualified_name = strrchr (name, '.'); + if (unqualified_name == NULL) + unqualified_name = name; + + temp = clas; + temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure"); + if (name != NULL && strcmp (name, "java.lang.Object") == 0) + { + tsuper = get_java_object_type (); + if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR) + tsuper = TYPE_TARGET_TYPE (tsuper); + type_is_object = 1; + } + else + tsuper = type_from_class (temp); + +#if 1 + ninterfaces = 0; +#else + temp = clas; + ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure")); +#endif + TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces; + temp = clas; + nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure")); + nfields += TYPE_N_BASECLASSES (type); + nfields++; /* Add one for dummy "class" field. */ + TYPE_NFIELDS (type) = nfields; + TYPE_FIELDS (type) = (struct field *) + TYPE_ALLOC (type, sizeof (struct field) * nfields); + + memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); + + TYPE_FIELD_PRIVATE_BITS (type) = + (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); + + TYPE_FIELD_PROTECTED_BITS (type) = + (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); + + TYPE_FIELD_IGNORE_BITS (type) = + (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); + + TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) + TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type))); + B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type)); + + if (tsuper != NULL) + { + TYPE_BASECLASS (type, 0) = tsuper; + if (type_is_object) + SET_TYPE_FIELD_PRIVATE (type, 0); + } + + i = strlen (name); + if (i > 2 && name[i-1] == ']' && tsuper != NULL) + { + /* FIXME */ + TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */ + } + else + { + temp = clas; + temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure"); + TYPE_LENGTH (type) = value_as_long (temp); + } + + fields = NULL; + nfields--; /* First set up dummy "class" field. */ + SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields), + VALUE_ADDRESS (clas) + VALUE_OFFSET (clas)); + TYPE_FIELD_NAME (type, nfields) = "class"; + TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas); + SET_TYPE_FIELD_PRIVATE (type, nfields); + + for (i = TYPE_N_BASECLASSES (type); i < nfields; i++) + { + int accflags; + int boffset; + if (fields == NULL) + { + temp = clas; + fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure"); + field = value_ind (fields); + } + else + { /* Re-use field value for next field. */ + VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field)); + VALUE_LAZY (field) = 1; + } + temp = field; + temp = value_struct_elt (&temp, NULL, "name", NULL, "structure"); + TYPE_FIELD_NAME (type, i) = + get_java_utf8_name (&objfile->type_obstack, temp); + temp = field; + accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags", + NULL, "structure")); + temp = field; + temp = value_struct_elt (&temp, NULL, "info", NULL, "structure"); + boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset", + NULL, "structure")); + if (accflags & 0x0001) /* public access */ + { + /* ??? */ + } + if (accflags & 0x0002) /* private access */ + { + SET_TYPE_FIELD_PRIVATE (type, i); + } + if (accflags & 0x0004) /* protected access */ + { + SET_TYPE_FIELD_PROTECTED (type, i); + } + if (accflags & 0x0008) /* ACC_STATIC */ + SET_FIELD_PHYSADDR(TYPE_FIELD(type, i), boffset); + else + TYPE_FIELD_BITPOS (type, i) = 8 * boffset; + if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */ + { + TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */ + } + else + { + struct type *ftype; + temp = field; + temp = value_struct_elt (&temp, NULL, "type", NULL, "structure"); + ftype = type_from_class (temp); + if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT) + ftype = lookup_pointer_type (ftype); + TYPE_FIELD_TYPE (type, i) = ftype; + } + } + + temp = clas; + nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count", + NULL, "structure")); + TYPE_NFN_FIELDS_TOTAL (type) = nmethods; + j = nmethods * sizeof (struct fn_field); + fn_fields = (struct fn_field*) + obstack_alloc (&dynamics_objfile->symbol_obstack, j); + memset (fn_fields, 0, j); + fn_fieldlists = (struct fn_fieldlist*) + alloca (nmethods * sizeof (struct fn_fieldlist)); + + methods = NULL; + for (i = 0; i < nmethods; i++) + { + char *mname; + int k; + if (methods == NULL) + { + temp = clas; + methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure"); + method = value_ind (methods); + } + else + { /* Re-use method value for next method. */ + VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method)); + VALUE_LAZY (method) = 1; + } + + /* Get method name. */ + temp = method; + temp = value_struct_elt (&temp, NULL, "name", NULL, "structure"); + mname = get_java_utf8_name (&objfile->type_obstack, temp); + if (strcmp (mname, "<init>") == 0) + mname = unqualified_name; + + /* Check for an existing method with the same name. + * This makes building the fn_fieldslists an O(nmethods**2) + * operation. That could be using hashing, but I doubt it + * is worth it. Note that we do maintain the order of methods + * in the inferior's Method table (as long as that is grouped + * by method name), which I think is desirable. --PB */ + for (k = 0, j = TYPE_NFN_FIELDS (type); ; ) + { + if (--j < 0) + { /* No match - new method name. */ + j = TYPE_NFN_FIELDS(type)++; + fn_fieldlists[j].name = mname; + fn_fieldlists[j].length = 1; + fn_fieldlists[j].fn_fields = &fn_fields[i]; + k = i; + break; + } + if (strcmp (mname, fn_fieldlists[j].name) == 0) + { /* Found an existing method with the same name. */ + int l; + if (mname != unqualified_name) + obstack_free (&objfile->type_obstack, mname); + mname = fn_fieldlists[j].name; + fn_fieldlists[j].length++; + k = i - k; /* Index of new slot. */ + /* Shift intervening fn_fields (between k and i) down. */ + for (l = i; l > k; l--) fn_fields[l] = fn_fields[l-1]; + for (l = TYPE_NFN_FIELDS (type); --l > j; ) + fn_fieldlists[l].fn_fields++; + break; + } + k += fn_fieldlists[j].length; + } + fn_fields[k].physname = ""; + fn_fields[k].is_stub = 1; + fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME*/ + TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD; + } + + j = TYPE_NFN_FIELDS(type) * sizeof (struct fn_fieldlist); + TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist*) + obstack_alloc (&dynamics_objfile->symbol_obstack, j); + memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j); + + return type; +} + +static struct type *java_object_type; + +struct type * +get_java_object_type () +{ + if (java_object_type == NULL) + { + struct symbol *sym; + sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_NAMESPACE, + (int *) 0, (struct symtab **) NULL); + if (sym == NULL) + error ("cannot find java.lang.Object"); + java_object_type = SYMBOL_TYPE (sym); + } + return java_object_type; +} + +int +get_java_object_header_size () +{ + struct type *objtype = get_java_object_type (); + if (objtype == NULL) + return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT); + else + return TYPE_LENGTH (objtype); +} + +int +is_object_type (type) + struct type *type; +{ + CHECK_TYPEDEF (type); + if (TYPE_CODE (type) == TYPE_CODE_PTR) + { + struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type)); + char *name; + if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT) + return 0; + while (TYPE_N_BASECLASSES (ttype) > 0) + ttype = TYPE_BASECLASS (ttype, 0); + name = TYPE_TAG_NAME (ttype); + if (name != NULL && strcmp (name, "java.lang.Object") == 0) + return 1; + name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char*)0; + if (name != NULL && strcmp (name, "vtable") == 0) + { + if (java_object_type == NULL) + java_object_type = type; + return 1; + } + } + return 0; +} + +struct type * +java_primitive_type (signature) + int signature; +{ + switch (signature) + { + case 'B': return java_byte_type; + case 'S': return java_short_type; + case 'I': return java_int_type; + case 'J': return java_long_type; + case 'Z': return java_boolean_type; + case 'C': return java_char_type; + case 'F': return java_float_type; + case 'D': return java_double_type; + case 'V': return java_void_type; + } + error ("unknown signature '%c' for primitive type", (char) signature); +} + +/* If name[0 .. namelen-1] is the name of a primitive Java type, + return that type. Otherwise, return NULL. */ + +struct type * +java_primitive_type_from_name (name, namelen) + char* name; + int namelen; +{ + switch (name[0]) + { + case 'b': + if (namelen == 4 && memcmp (name, "byte", 4) == 0) + return java_byte_type; + if (namelen == 7 && memcmp (name, "boolean", 7) == 0) + return java_boolean_type; + break; + case 'c': + if (namelen == 4 && memcmp (name, "char", 4) == 0) + return java_char_type; + case 'd': + if (namelen == 6 && memcmp (name, "double", 6) == 0) + return java_double_type; + break; + case 'f': + if (namelen == 5 && memcmp (name, "float", 5) == 0) + return java_float_type; + break; + case 'i': + if (namelen == 3 && memcmp (name, "int", 3) == 0) + return java_int_type; + break; + case 'l': + if (namelen == 4 && memcmp (name, "long", 4) == 0) + return java_long_type; + break; + case 's': + if (namelen == 5 && memcmp (name, "short", 5) == 0) + return java_short_type; + break; + case 'v': + if (namelen == 4 && memcmp (name, "void", 4) == 0) + return java_void_type; + break; + } + return NULL; +} + +/* Return the length (in bytes) of demangled name of the Java type + signature string SIGNATURE. */ + +static int +java_demangled_signature_length (signature) + char *signature; +{ + int array = 0; + for (; *signature == '['; signature++) + array += 2; /* Two chars for "[]". */ + switch (signature[0]) + { + case 'L': + /* Subtract 2 for 'L' and ';'. */ + return strlen (signature) - 2 + array; + default: + return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array; + } +} + +/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */ + +static void +java_demangled_signature_copy (result, signature) + char *result; + char *signature; +{ + int array = 0; + char *ptr; + int i; + while (*signature == '[') + { + array++; + signature++; + } + switch (signature[0]) + { + case 'L': + /* Subtract 2 for 'L' and ';', but add 1 for final nul. */ + signature++; + ptr = result; + for ( ; *signature != ';' && *signature != '\0'; signature++) + { + if (*signature == '/') + *ptr++ = '.'; + else + *ptr++ = *signature; + } + break; + default: + ptr = TYPE_NAME (java_primitive_type (signature[0])); + i = strlen (ptr); + strcpy (result, ptr); + ptr = result + i; + break; + } + while (--array >= 0) + { + *ptr++ = '['; + *ptr++ = ']'; + } +} + +/* Return the demangled name of the Java type signature string SIGNATURE, + as a freshly allocated copy. */ + +char * +java_demangle_type_signature (signature) + char *signature; +{ + int length = java_demangled_signature_length (signature); + char *result = xmalloc (length + 1); + java_demangled_signature_copy (result, signature); + result[length] = '\0'; + return result; +} + +struct type * +java_lookup_type (signature) + char *signature; +{ + switch (signature[0]) + { + case 'L': + case '[': + error ("java_lookup_type not fully implemented"); + default: + return java_primitive_type (signature[0]); + } +} + +/* Return the type of TYPE followed by DIMS pairs of [ ]. + If DIMS == 0, TYPE is returned. */ + +struct type * +java_array_type (type, dims) + struct type *type; + int dims; +{ + struct type *range_type; + + while (dims-- > 0) + { + range_type = create_range_type (NULL, builtin_type_int, 0, 0); + /* FIXME This is bogus! Java arrays are not gdb arrays! */ + type = create_array_type (NULL, type, range_type); + } + + return type; +} + +/* Create a Java string in the inferior from a (Utf8) literal. */ + +value_ptr +java_value_string (ptr, len) + char *ptr; + int len; +{ + error ("not implemented - java_value_string"); /* FIXME */ +} + +/* Print the character C on STREAM as part of the contents of a literal + string whose delimiter is QUOTER. Note that that format for printing + characters and strings is language specific. */ + +static void +java_emit_char (c, stream, quoter) + int c; + GDB_FILE *stream; + int quoter; +{ + switch (c) + { + case '\\': + case '\'': + fprintf_filtered (stream, "\\%c", c); + break; + case '\b': + fputs_filtered ("\\b", stream); + break; + case '\t': + fputs_filtered ("\\t", stream); + break; + case '\n': + fputs_filtered ("\\n", stream); + break; + case '\f': + fputs_filtered ("\\f", stream); + break; + case '\r': + fputs_filtered ("\\r", stream); + break; + default: + if (isprint (c)) + fputc_filtered (c, stream); + else + fprintf_filtered (stream, "\\u%.4x", (unsigned int) c); + break; + } +} + +static value_ptr +evaluate_subexp_java (expect_type, exp, pos, noside) + struct type *expect_type; + register struct expression *exp; + register int *pos; + enum noside noside; +{ + int pc = *pos; + int i; + char *name; + enum exp_opcode op = exp->elts[*pos].opcode; + value_ptr arg1, arg2; + struct type *type; + switch (op) + { + case UNOP_IND: + if (noside == EVAL_SKIP) + goto standard; + (*pos)++; + arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL); + if (is_object_type (VALUE_TYPE (arg1))) + { + struct type *type; + + type = type_from_class (java_class_from_object (arg1)); + arg1 = value_cast (lookup_pointer_type (type), arg1); + } + if (noside == EVAL_SKIP) + goto nosideret; + return value_ind (arg1); + + case BINOP_SUBSCRIPT: + (*pos)++; + arg1 = evaluate_subexp_with_coercion (exp, pos, noside); + arg2 = evaluate_subexp_with_coercion (exp, pos, noside); + if (noside == EVAL_SKIP) + goto nosideret; + /* If the user attempts to subscript something that is not an + array or pointer type (like a plain int variable for example), + then report this as an error. */ + + COERCE_REF (arg1); + type = check_typedef (VALUE_TYPE (arg1)); + if (TYPE_CODE (type) == TYPE_CODE_PTR) + type = check_typedef (TYPE_TARGET_TYPE (type)); + name = TYPE_NAME (type); + if (name == NULL) + name = TYPE_TAG_NAME (type); + i = name == NULL ? 0 : strlen (name); + if (TYPE_CODE (type) == TYPE_CODE_STRUCT + && i > 2 && name [i - 1] == ']') + { + CORE_ADDR address; + long length, index; + struct type *el_type; + char buf4[4]; + + value_ptr clas = java_class_from_object(arg1); + value_ptr temp = clas; + /* Get CLASS_ELEMENT_TYPE of the array type. */ + temp = value_struct_elt (&temp, NULL, "methods", + NULL, "structure"); + VALUE_TYPE (temp) = VALUE_TYPE (clas); + el_type = type_from_class (temp); + if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT) + el_type = lookup_pointer_type (el_type); + + if (noside == EVAL_AVOID_SIDE_EFFECTS) + return value_zero (el_type, VALUE_LVAL (arg1)); + address = value_as_pointer (arg1); + address += JAVA_OBJECT_SIZE; + read_memory (address, buf4, 4); + length = (long) extract_signed_integer (buf4, 4); + index = (long) value_as_long (arg2); + if (index >= length || index < 0) + error ("array index (%ld) out of bounds (length: %ld)", + index, length); + address = (address + 4) + index * TYPE_LENGTH (el_type); + return value_at (el_type, address, NULL); + } + else if (TYPE_CODE (type) == TYPE_CODE_ARRAY) + { + if (noside == EVAL_AVOID_SIDE_EFFECTS) + return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); + else + return value_subscript (arg1, arg2); + } + if (name) + error ("cannot subscript something of type `%s'", name); + else + error ("cannot subscript requested type"); + + case OP_STRING: + (*pos)++; + i = longest_to_int (exp->elts[pc + 1].longconst); + (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1); + if (noside == EVAL_SKIP) + goto nosideret; + return java_value_string (&exp->elts[pc + 2].string, i); + + case STRUCTOP_STRUCT: + arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); + /* Convert object field (such as TYPE.class) to reference. */ + if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT) + arg1 = value_addr (arg1); + return arg1; + default: + break; + } +standard: + return evaluate_subexp_standard (expect_type, exp, pos, noside); + nosideret: + return value_from_longest (builtin_type_long, (LONGEST) 1); +} + +static struct type * +java_create_fundamental_type (objfile, typeid) + struct objfile *objfile; + int typeid; +{ + switch (typeid) + { + case FT_VOID: return java_void_type; + case FT_BOOLEAN: return java_boolean_type; + case FT_CHAR: return java_char_type; + case FT_FLOAT: return java_float_type; + case FT_DBL_PREC_FLOAT: return java_double_type; + case FT_BYTE: case FT_SIGNED_CHAR: return java_byte_type; + case FT_SHORT: case FT_SIGNED_SHORT: return java_short_type; + case FT_INTEGER: case FT_SIGNED_INTEGER: return java_int_type; + case FT_LONG: case FT_SIGNED_LONG: return java_long_type; + } + return c_create_fundamental_type (objfile, typeid); +} + +/* Table mapping opcodes into strings for printing operators + and precedences of the operators. */ + +const struct op_print java_op_print_tab[] = + { + {",", BINOP_COMMA, PREC_COMMA, 0}, + {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, + {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, + {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, + {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, + {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, + {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, + {"==", BINOP_EQUAL, PREC_EQUAL, 0}, + {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, + {"<=", BINOP_LEQ, PREC_ORDER, 0}, + {">=", BINOP_GEQ, PREC_ORDER, 0}, + {">", BINOP_GTR, PREC_ORDER, 0}, + {"<", BINOP_LESS, PREC_ORDER, 0}, + {">>", BINOP_RSH, PREC_SHIFT, 0}, + {"<<", BINOP_LSH, PREC_SHIFT, 0}, +#if 0 + {">>>", BINOP_???, PREC_SHIFT, 0}, +#endif + {"+", BINOP_ADD, PREC_ADD, 0}, + {"-", BINOP_SUB, PREC_ADD, 0}, + {"*", BINOP_MUL, PREC_MUL, 0}, + {"/", BINOP_DIV, PREC_MUL, 0}, + {"%", BINOP_REM, PREC_MUL, 0}, + {"-", UNOP_NEG, PREC_PREFIX, 0}, + {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, + {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0}, + {"*", UNOP_IND, PREC_PREFIX, 0}, +#if 0 + {"instanceof", ???, ???, 0}, +#endif + {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0}, + {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0}, + {NULL, 0, 0, 0} +}; + +const struct language_defn java_language_defn = { + "java", /* Language name */ + language_java, + c_builtin_types, + range_check_off, + type_check_off, + java_parse, + java_error, + evaluate_subexp_java, + c_printchar, /* Print a character constant */ + c_printstr, /* Function to print string constant */ + java_emit_char, /* Function to print a single character */ + java_create_fundamental_type, /* Create fundamental type in this language */ + java_print_type, /* Print a type using appropriate syntax */ + java_val_print, /* Print a value using appropriate syntax */ + java_value_print, /* Print a top-level value */ + {"", "", "", ""}, /* Binary format info */ + {"0%lo", "0", "o", ""}, /* Octal format info */ + {"%ld", "", "d", ""}, /* Decimal format info */ + {"0x%lx", "0x", "x", ""}, /* Hex format info */ + java_op_print_tab, /* expression operators for printing */ + 0, /* not c-style arrays */ + 0, /* String lower bound */ + &builtin_type_char, /* Type of string elements */ + LANG_MAGIC +}; + +void +_initialize_java_language () +{ + + java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL); + java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL); + java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL); + java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL); + java_boolean_type= init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL); + java_char_type = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL); + java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL); + java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL); + java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL); + + add_language (&java_language_defn); +} + +/* Cleanup code that should be run on every "run". + We should use make_run_cleanup to have this be called. + But will that mess up values in value histry? FIXME */ + +void java_rerun_cleanup () +{ + if (class_symtab != NULL) + { + free_symtab (class_symtab); /* ??? */ + class_symtab = NULL; + } + if (dynamics_objfile != NULL) + { + free_objfile (dynamics_objfile); + dynamics_objfile = NULL; + } + + java_object_type = NULL; +} |