/* Java language support routines for GDB, the GNU debugger. Copyright 1997, 1998, 1999-2000 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; /* Local functions */ extern void _initialize_java_language (void); static int java_demangled_signature_length (char *); static void java_demangled_signature_copy (char *, char *); static struct symtab *get_java_class_symtab (void); static char *get_java_utf8_name (struct obstack *obstack, value_ptr name); static int java_class_is_primitive (value_ptr clas); static struct type *java_lookup_type (char *signature); static value_ptr java_value_string (char *ptr, int len); static void java_emit_char (int c, struct ui_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 (struct type *, value_ptr); static struct objfile * get_dynamics_objfile (void) { if (dynamics_objfile == NULL) { dynamics_objfile = allocate_objfile (NULL, 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; static struct symtab * get_java_class_symtab (void) { 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 (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 (struct type *type, CORE_ADDR addr); static struct symbol * add_class_symbol (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 (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 (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 (data_addr, chrs, name_length); return chrs; } value_ptr java_class_from_object (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): */ static int java_class_is_primitive (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 (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 (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 (void) { 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 (void) { 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 (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 (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 (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 (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 (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 (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 (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 (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. */ static value_ptr java_value_string (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 (int c, struct ui_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 (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 (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, case_sensitive_on, 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 (void) { 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 */ extern void java_rerun_cleanup (void); void java_rerun_cleanup (void) { 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; }