/* Support for printing Java values 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 "gdbcore.h" #include "expression.h" #include "value.h" #include "demangle.h" #include "valprint.h" #include "language.h" #include "jv-lang.h" #include "c-lang.h" #include "annotate.h" /* Local functions */ static void java_print_value_fields (struct type * type, char *valaddr, CORE_ADDR address, struct ui_file *stream, int format, int recurse, enum val_prettyprint pretty); int java_value_print (struct value *val, struct ui_file *stream, int format, enum val_prettyprint pretty) { struct type *type; CORE_ADDR address; int i; char *name; type = VALUE_TYPE (val); address = VALUE_ADDRESS (val) + VALUE_OFFSET (val); if (is_object_type (type)) { CORE_ADDR obj_addr; /* Get the run-time type, and cast the object into that */ obj_addr = unpack_pointer (type, VALUE_CONTENTS (val)); if (obj_addr != 0) { type = type_from_class (java_class_from_object (val)); type = lookup_pointer_type (type); val = value_at (type, address, NULL); } } if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val)) type_print (TYPE_TARGET_TYPE (type), "", stream, -1); name = TYPE_TAG_NAME (type); if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL && (i = strlen (name), name[i - 1] == ']')) { char buf4[4]; long length; unsigned int things_printed = 0; int reps; struct type *el_type = java_primitive_type_from_name (name, i - 2); i = 0; read_memory (address + JAVA_OBJECT_SIZE, buf4, 4); length = (long) extract_signed_integer (buf4, 4); fprintf_filtered (stream, "{length: %ld", length); if (el_type == NULL) { CORE_ADDR element; CORE_ADDR next_element = -1; /* dummy initial value */ address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */ while (i < length && things_printed < print_max) { char *buf; buf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT); fputs_filtered (", ", stream); wrap_here (n_spaces (2)); if (i > 0) element = next_element; else { read_memory (address, buf, sizeof (buf)); address += TARGET_PTR_BIT / HOST_CHAR_BIT; element = extract_address (buf, sizeof (buf)); } for (reps = 1; i + reps < length; reps++) { read_memory (address, buf, sizeof (buf)); address += TARGET_PTR_BIT / HOST_CHAR_BIT; next_element = extract_address (buf, sizeof (buf)); if (next_element != element) break; } if (reps == 1) fprintf_filtered (stream, "%d: ", i); else fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1); if (element == 0) fprintf_filtered (stream, "null"); else fprintf_filtered (stream, "@%s", paddr_nz (element)); things_printed++; i += reps; } } else { struct value *v = allocate_value (el_type); struct value *next_v = allocate_value (el_type); VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4; VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v); while (i < length && things_printed < print_max) { fputs_filtered (", ", stream); wrap_here (n_spaces (2)); if (i > 0) { struct value *tmp; tmp = next_v; next_v = v; v = tmp; } else { VALUE_LAZY (v) = 1; VALUE_OFFSET (v) = 0; } VALUE_OFFSET (next_v) = VALUE_OFFSET (v); for (reps = 1; i + reps < length; reps++) { VALUE_LAZY (next_v) = 1; VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type); if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v), TYPE_LENGTH (el_type)) != 0) break; } if (reps == 1) fprintf_filtered (stream, "%d: ", i); else fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1); val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0, stream, format, 2, 1, pretty); things_printed++; i += reps; } } if (i < length) fprintf_filtered (stream, "..."); fprintf_filtered (stream, "}"); return 0; } /* If it's type String, print it */ if (TYPE_CODE (type) == TYPE_CODE_PTR && TYPE_TARGET_TYPE (type) && TYPE_NAME (TYPE_TARGET_TYPE (type)) && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0 && (format == 0 || format == 's') && address != 0 && value_as_address (val) != 0) { struct value *data_val; CORE_ADDR data; struct value *boffset_val; unsigned long boffset; struct value *count_val; unsigned long count; struct value *mark; mark = value_mark (); /* Remember start of new values */ data_val = value_struct_elt (&val, NULL, "data", NULL, NULL); data = value_as_address (data_val); boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL); boffset = value_as_address (boffset_val); count_val = value_struct_elt (&val, NULL, "count", NULL, NULL); count = value_as_address (count_val); value_free_to_mark (mark); /* Release unnecessary values */ val_print_string (data + boffset, count, 2, stream); return 0; } return (val_print (type, VALUE_CONTENTS (val), 0, address, stream, format, 1, 0, pretty)); } /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the same meanings as in cp_print_value and c_val_print. DONT_PRINT is an array of baseclass types that we should not print, or zero if called from top level. */ static void java_print_value_fields (struct type *type, char *valaddr, CORE_ADDR address, struct ui_file *stream, int format, int recurse, enum val_prettyprint pretty) { int i, len, n_baseclasses; CHECK_TYPEDEF (type); fprintf_filtered (stream, "{"); len = TYPE_NFIELDS (type); n_baseclasses = TYPE_N_BASECLASSES (type); if (n_baseclasses > 0) { int i, n_baseclasses = TYPE_N_BASECLASSES (type); for (i = 0; i < n_baseclasses; i++) { int boffset; struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); char *basename = TYPE_NAME (baseclass); char *base_valaddr; if (BASETYPE_VIA_VIRTUAL (type, i)) continue; if (basename != NULL && strcmp (basename, "java.lang.Object") == 0) continue; boffset = 0; if (pretty) { fprintf_filtered (stream, "\n"); print_spaces_filtered (2 * (recurse + 1), stream); } fputs_filtered ("<", stream); /* Not sure what the best notation is in the case where there is no baseclass name. */ fputs_filtered (basename ? basename : "", stream); fputs_filtered ("> = ", stream); base_valaddr = valaddr; java_print_value_fields (baseclass, base_valaddr, address + boffset, stream, format, recurse + 1, pretty); fputs_filtered (", ", stream); flush_it: ; } } if (!len && n_baseclasses == 1) fprintf_filtered (stream, "<No data fields>"); else { extern int inspect_it; int fields_seen = 0; for (i = n_baseclasses; i < len; i++) { /* If requested, skip printing of static fields. */ if (TYPE_FIELD_STATIC (type, i)) { char *name = TYPE_FIELD_NAME (type, i); if (!static_field_print) continue; if (name != NULL && strcmp (name, "class") == 0) continue; } if (fields_seen) fprintf_filtered (stream, ", "); else if (n_baseclasses > 0) { if (pretty) { fprintf_filtered (stream, "\n"); print_spaces_filtered (2 + 2 * recurse, stream); fputs_filtered ("members of ", stream); fputs_filtered (type_name_no_tag (type), stream); fputs_filtered (": ", stream); } } fields_seen = 1; if (pretty) { fprintf_filtered (stream, "\n"); print_spaces_filtered (2 + 2 * recurse, stream); } else { wrap_here (n_spaces (2 + 2 * recurse)); } if (inspect_it) { if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) fputs_filtered ("\"( ptr \"", stream); else fputs_filtered ("\"( nodef \"", stream); if (TYPE_FIELD_STATIC (type, i)) fputs_filtered ("static ", stream); fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), language_cplus, DMGL_PARAMS | DMGL_ANSI); fputs_filtered ("\" \"", stream); fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), language_cplus, DMGL_PARAMS | DMGL_ANSI); fputs_filtered ("\") \"", stream); } else { annotate_field_begin (TYPE_FIELD_TYPE (type, i)); if (TYPE_FIELD_STATIC (type, i)) fputs_filtered ("static ", stream); fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), language_cplus, DMGL_PARAMS | DMGL_ANSI); annotate_field_name_end (); fputs_filtered (": ", stream); annotate_field_value (); } if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i)) { struct value *v; /* Bitfields require special handling, especially due to byte order problems. */ if (TYPE_FIELD_IGNORE (type, i)) { fputs_filtered ("<optimized out or zero length>", stream); } else { v = value_from_longest (TYPE_FIELD_TYPE (type, i), unpack_field_as_long (type, valaddr, i)); val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0, 0, stream, format, 0, recurse + 1, pretty); } } else { if (TYPE_FIELD_IGNORE (type, i)) { fputs_filtered ("<optimized out or zero length>", stream); } else if (TYPE_FIELD_STATIC (type, i)) { struct value *v = value_static_field (type, i); if (v == NULL) fputs_filtered ("<optimized out>", stream); else { struct type *t = check_typedef (VALUE_TYPE (v)); if (TYPE_CODE (t) == TYPE_CODE_STRUCT) v = value_addr (v); val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v), stream, format, 0, recurse + 1, pretty); } } else if (TYPE_FIELD_TYPE (type, i) == NULL) fputs_filtered ("<unknown type>", stream); else { val_print (TYPE_FIELD_TYPE (type, i), valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0, address + TYPE_FIELD_BITPOS (type, i) / 8, stream, format, 0, recurse + 1, pretty); } } annotate_field_end (); } if (pretty) { fprintf_filtered (stream, "\n"); print_spaces_filtered (2 * recurse, stream); } } fprintf_filtered (stream, "}"); } /* Print data of type TYPE located at VALADDR (within GDB), which came from the inferior at address ADDRESS, onto stdio stream STREAM according to FORMAT (a letter or 0 for natural format). The data at VALADDR is in target byte order. If the data are a string pointer, returns the number of string characters printed. If DEREF_REF is nonzero, then dereference references, otherwise just print them like pointers. The PRETTY parameter controls prettyprinting. */ int java_val_print (struct type *type, char *valaddr, int embedded_offset, CORE_ADDR address, struct ui_file *stream, int format, int deref_ref, int recurse, enum val_prettyprint pretty) { register unsigned int i = 0; /* Number of characters printed */ struct type *target_type; CORE_ADDR addr; CHECK_TYPEDEF (type); switch (TYPE_CODE (type)) { case TYPE_CODE_PTR: if (format && format != 's') { print_scalar_formatted (valaddr, type, format, 0, stream); break; } #if 0 if (vtblprint && cp_is_vtbl_ptr_type (type)) { /* Print the unmangled name if desired. */ /* Print vtable entry - we only get here if we ARE using -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */ print_address_demangle (extract_address (valaddr, TYPE_LENGTH (type)), stream, demangle); break; } #endif addr = unpack_pointer (type, valaddr); if (addr == 0) { fputs_filtered ("null", stream); return i; } target_type = check_typedef (TYPE_TARGET_TYPE (type)); if (TYPE_CODE (target_type) == TYPE_CODE_FUNC) { /* Try to print what function it points to. */ print_address_demangle (addr, stream, demangle); /* Return value is irrelevant except for string pointers. */ return (0); } if (addressprint && format != 's') { fputs_filtered ("@", stream); print_longest (stream, 'x', 0, (ULONGEST) addr); } return i; case TYPE_CODE_CHAR: format = format ? format : output_format; if (format) print_scalar_formatted (valaddr, type, format, 0, stream); else LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream); break; case TYPE_CODE_INT: /* Can't just call c_val_print because that print bytes as C chars. */ format = format ? format : output_format; if (format) print_scalar_formatted (valaddr, type, format, 0, stream); else val_print_type_code_int (type, valaddr, stream); break; case TYPE_CODE_STRUCT: java_print_value_fields (type, valaddr, address, stream, format, recurse, pretty); break; default: return c_val_print (type, valaddr, embedded_offset, address, stream, format, deref_ref, recurse, pretty); } return 0; }