old-cross-binutils/gdb/objc-lang.c
Tom Tromey f8eba3c616 the "ambiguous linespec" series
gdb
2011-12-06  Joel Brobecker  <brobecker@acacore.com>

        * language.h (struct language_defn): Add new component
        la_symbol_name_compare.
        * symfile.h (struct quick_symbol_functions): Update the profile
        of parameter "name_matcher" for the expand_symtabs_matching
        method.  Update the documentation accordingly.
        * ada-lang.h (ada_name_for_lookup): Add declaration.
        * ada-lang.c (ada_name_for_lookup): New function, extracted out
        from ada_iterate_over_symbols.
        (ada_iterate_over_symbols): Do not encode symbol name anymore.
        (ada_expand_partial_symbol_name): Adjust profile.
        (ada_language_defn): Add value for la_symbol_name_compare field.
        * linespec.c: #include "ada-lang.h".
        (iterate_name_matcher): Add language parameter. Replace call
        to strcmp_iw by call to language->la_symbol_name_compare.
        (decode_variable): Encode COPY if current language is Ada.
        * dwarf2read.c (dw2_expand_symtabs_matching): Adjust profile
        of name_matcher parameter.  Adjust call to name_matcher.
        * psymtab.c (expand_symtabs_matching_via_partial): Likewise.
        (expand_partial_symbol_names): Update profile of parameter "fun".
        * psymtab.h (expand_partial_symbol_names): Update profile of
        parameter "fun".
        * symtab.c (demangle_for_lookup): Update function documentation.
        (search_symbols_name_matches): Add language parameter.
        (expand_partial_symbol_name): Likewise.
        * c-lang.c (c_language_defn, cplus_language_defn)
        (asm_language_defn, minimal_language_defn): Add value for
        la_symbol_name_compare field.
        * d-lang.c (d_language_defn): Likewise.
        * f-lang.c (f_language_defn): Ditto.
        * jv-lang.c (java_language_defn): Ditto.
        * m2-lang.c (m2_language_defn): Ditto.
        * objc-lang.c (objc_language_defn): Ditto.
        * opencl-lang.c (opencl_language_defn): Ditto.
        * p-lang.c (pascal_language_defn): Ditto.
        * language.c (unknown_language_defn, auto_language_defn)
        (local_language_defn): Ditto.

2011-12-06  Tom Tromey  <tromey@redhat.com>

	* linespec.c (iterate_over_all_matching_symtabs): Use
	LA_ITERATE_OVER_SYMBOLS.
	(lookup_prefix_sym, add_matching_symbols_to_info): Likewise.
	(find_function_symbols, decode_variable): Remove Ada special
	case.
	* language.h (struct language_defn) <la_iterate_over_symbols>: New
	field.
	(LA_ITERATE_OVER_SYMBOLS): New macro.
	* language.c (unknown_language_defn, auto_language_defn)
	(local_language_defn): Update.
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Update.
	* d-lang.c (d_language_defn): Update.
	* f-lang.c (f_language_defn): Update.
	* jv-lang.c (java_language_defn): Update.
	* m2-lang.c (m2_language_defn): Update.
	* objc-lang.c (objc_language_defn): Update.
	* opencl-lang.c (opencl_language_defn): Update.
	* p-lang.c (pascal_language_defn): Update.
	* ada-lang.c (ada_iterate_over_symbols): New function.
	(ada_language_defn): Update.

2011-12-06  Tom Tromey  <tromey@redhat.com>
	    Joel Brobecker  <brobecker@acacore.com>

	PR breakpoints/13105, PR objc/8341, PR objc/8343, PR objc/8366,
	PR objc/8535, PR breakpoints/11657, PR breakpoints/11970,
	PR breakpoints/12023, PR breakpoints/12334, PR breakpoints/12856,
	PR shlibs/8929, PR shlibs/7393:
	* python/py-type.c (compare_maybe_null_strings): Rename from
	compare_strings.
	(check_types_equal): Update.
	* utils.c (compare_strings): New function.
	* tui/tui-winsource.c (tui_update_breakpoint_info): Update for
	location changes.
	* tracepoint.c (scope_info): Update.
	(trace_find_line_command): Use DECODE_LINE_FUNFIRSTLINE.
	* symtab.h (iterate_over_minimal_symbols)
	(iterate_over_some_symtabs, iterate_over_symtabs)
	(find_pcs_for_symtab_line, iterate_over_symbols)
	(demangle_for_lookup): Declare.
	(expand_line_sal): Remove.
	* symtab.c (iterate_over_some_symtabs, iterate_over_symtabs)
	(lookup_symtab_callback): New functions.
	(lookup_symtab): Rewrite.
	(demangle_for_lookup): New function, extract from
	lookup_symbol_in_language.
	(lookup_symbol_in_language): Use it.
	(iterate_over_symbols): New function.
	(find_line_symtab): Update.
	(find_pcs_for_symtab_line): New functions.
	(find_line_common): Add 'start' argument.
	(decode_line_spec): Update.  Change argument to 'flags', change
	interpretation.
	(append_expanded_sal): Remove.
	(append_exact_match_to_sals): Remove.
	(expand_line_sal): Remove.
	* symfile.h (struct quick_symbol_functions) <lookup_symtab>:
	Remove.
	<map_symtabs_matching_filename>: New field.
	* stack.c (func_command): Only look in the current program space.
	Use DECODE_LINE_FUNFIRSTLINE.
	* source.c (line_info): Set pspace on sal.  Check program space in
	the loop.  Use DECODE_LINE_LIST_MODE.
	(select_source_symtab): Use DECODE_LINE_FUNFIRSTLINE.
	* solib-target.c: Remove DEF_VEC_I(CORE_ADDR).
	* python/python.c (gdbpy_decode_line): Update.
	* psymtab.c (partial_map_expand_apply): New function.
	(partial_map_symtabs_matching_filename): Rename from
	lookup_partial_symbol.  Update arguments.
	(lookup_symtab_via_partial_symtab): Remove.
	(psym_functions): Update.
	* objc-lang.h (parse_selector, parse_method): Don't declare.
	(find_imps): Update.
	* objc-lang.c (parse_selector, parse_method): Now static.
	(find_methods): Change arguments.  Fill in a vector of symbol
	names.
	(uniquify_strings): New function.
	(find_imps): Change arguments.
	* minsyms.c (iterate_over_minimal_symbols): New function.
	* linespec.h (enum decode_line_flags): New.
	(struct linespec_sals): New.
	(struct linespec_result) <canonical>: Remove.
	<pre_expanded, addr_string, sals>: New fields.
	(destroy_linespec_result, make_cleanup_destroy_linespec_result)
	(decode_line_full): Declare.
	(decode_line_1): Update.
	* linespec.c (struct address_entry, struct linespec_state, struct
	collect_info): New types.
	(add_sal_to_sals_basic, add_sal_to_sals, hash_address_entry)
	(eq_address_entry, maybe_add_address): New functions.
	(total_number_of_methods): Remove.
	(iterate_name_matcher, iterate_over_all_matching_symtabs): New
	functions.
	(find_methods): Change arguments.  Don't canonicalize input.
	Simplify logic.
	(add_matching_methods, add_constructors)
	(build_canonical_line_spec): Remove.
	(filter_results, convert_results_to_lsals): New functions.
	(decode_line_2): Change arguments.  Rewrite for new data
	structures.
	(decode_line_internal): Rename from decode_line_1.  Change
	arguments.  Add cleanups.  Update for new data structures.
	(linespec_state_constructor, linespec_state_destructor)
	(decode_line_full, decode_line_1): New functions.
	(decode_indirect): Change arguments.  Update.
	(locate_first_half): Use skip_spaces.
	(decode_objc): Change arguments.  Update for new data structures.
	Simplify logic.
	(decode_compound): Change arguments.  Add cleanups.  Remove
	fallback code, replace with error.
	(struct decode_compound_collector): New type.
	(collect_one_symbol): New function.
	(lookup_prefix_sym): Change arguments.  Update.
	(compare_symbol_name, add_all_symbol_names_from_pspace)
	(find_superclass_methods ): New functions.
	(find_method): Rewrite.
	(struct symtab_collector): New type.
	(add_symtabs_to_list, collect_symtabs_from_filename): New
	functions.
	(symtabs_from_filename): Change API.  Rename from
	symtab_from_filename.
	(collect_function_symbols): New function.
	(find_function_symbols): Change API.  Rename from
	find_function_symbol.  Rewrite.
	(decode_all_digits): Change arguments.  Rewrite.
	(decode_dollar): Change arguments.  Use decode_variable.
	(decode_label): Change arguments.  Rewrite.
	(collect_symbols): New function.
	(minsym_found): Change arguments.  Rewrite.
	(check_minsym, search_minsyms_for_name)
	(add_matching_symbols_to_info): New function.
	(decode_variable): Change arguments.  Iterate over all symbols.
	(symbol_found): Remove.
	(symbol_to_sal): New function.
	(init_linespec_result, destroy_linespec_result)
	(cleanup_linespec_result, make_cleanup_destroy_linespec_result):
	New functions.
	(decode_digits_list_mode, decode_digits_ordinary): New functions.
	* dwarf2read.c (dw2_map_expand_apply): New function.
	(dw2_map_symtabs_matching_filename): Rename from
	dw2_lookup_symtab.  Change arguments.
	(dwarf2_gdb_index_functions): Update.
	* dwarf2loc.c: Remove DEF_VEC_I(CORE_ADDR).
	* defs.h (compare_strings): Declare.
	* cli/cli-cmds.c (compare_strings): Move to utils.c.
	(edit_command, list_command): Use DECODE_LINE_LIST_MODE.  Call
	filter_sals.
	(compare_symtabs, filter_sals): New functions.
	* breakpoint.h (struct bp_location) <line_number, source_file>:
	New fields.
	(struct breakpoint) <line_number, source_file>: Remove.
	<filter>: New field.
	* breakpoint.c (print_breakpoint_location, init_raw_breakpoint)
	(momentary_breakpoint_from_master, add_location_to_breakpoint):
	Update for changes to locations.
	(init_breakpoint_sal): Add 'filter' argument.  Set 'filter' on
	breakpoint.
	(create_breakpoint_sal): Add 'filter' argument.
	(remove_sal, expand_line_sal_maybe): Remove.
	(create_breakpoints_sal): Remove 'sals' argument.  Handle
	pre-expanded sals and the filter.
	(parse_breakpoint_sals): Use decode_line_full.
	(check_fast_tracepoint_sals): Use get_sal_arch.
	(create_breakpoint): Create a linespec_sals.  Update.
	(break_range_command): Use decode_line_full.  Update.
	(until_break_command): Update.
	(clear_command): Update match conditions for linespec.c changes.
	Use DECODE_LINE_LIST_MODE.
	(say_where): Update for changes to locations.
	(bp_location_dtor): Free 'source_file'.
	(base_breakpoint_dtor): Free 'filter'.  Don't free 'source_file'.
	(update_static_tracepoint): Update for changes to locations.
	(update_breakpoint_locations): Disable ranged breakpoint if too
	many locations match.  Update.
	(addr_string_to_sals): Use decode_line_full.  Resolve all sal
	PCs.
	(breakpoint_re_set_default): Don't call expand_line_sal_maybe.
	(decode_line_spec_1): Update.  Change argument name to 'flags',
	change interpretation.
	* block.h (block_containing_function): Declare.
	* block.c (block_containing_function): New function.
	* skip.c (skip_function_command): Update.
	(skip_re_set): Update.
	* infcmd.c (jump_command): Use DECODE_LINE_FUNFIRSTLINE.
	* mi/mi-main.c (mi_cmd_trace_find): Use DECODE_LINE_FUNFIRSTLINE.
	* NEWS: Add entry.

2011-12-06  Tom Tromey  <tromey@redhat.com>

	* elfread.c (elf_gnu_ifunc_resolver_return_stop): Allow
	breakpoint's pspace to be NULL.
	* breakpoint.h (struct breakpoint) <pspace>: Update comment.
	* breakpoint.c (init_raw_breakpoint): Conditionally set
	breakpoint's pspace.
	(init_breakpoint_sal): Don't set breakpoint's pspace.
	(prepare_re_set_context): Conditionally switch program space.
	(addr_string_to_sals): Check executing_startup on location's
	program space.

2011-12-06  Tom Tromey  <tromey@redhat.com>

	* breakpoint.h (enum enable_state) <bp_startup_disabled>: Remove.
	* breakpoint.c (should_be_inserted): Explicitly check if program
	space is executing startup.
	(describe_other_breakpoints): Update.
	(disable_breakpoints_before_startup): Change executing_startup
	earlier.  Remove loop.
	(enable_breakpoints_after_startup): Likewise.
	(init_breakpoint_sal): Don't use bp_startup_disabled.
	(create_breakpoint): Don't use bp_startup_disabled.
	(update_global_location_list): Use should_be_inserted.
	(bkpt_re_set): Update.
gdb/testsuite
2011-12-06  Joel Brobecker  <brobecker@acacore.com>

        * gdb.ada/fullname_bp.exp: Add tests for other valid linespecs
        involving a fully qualified function name.

2011-12-06  Tom Tromey  <tromey@redhat.com>

	* gdb.ada/homonym.exp: Add three breakpoint tests.

2011-12-06  Tom Tromey  <tromey@redhat.com>

	* gdb.base/solib-weak.exp (do_test): Remove kfail.
	* gdb.trace/tracecmd.exp: Disable pending breakpoints earlier.
	* gdb.objc/objcdecode.exp: Update for output changes.
	* gdb.linespec/linespec.exp: New file.
	* gdb.linespec/lspec.cc: New file.
	* gdb.linespec/lspec.h: New file.
	* gdb.linespec/body.h: New file.
	* gdb.linespec/base/two/thefile.cc: New file.
	* gdb.linespec/base/one/thefile.cc: New file.
	* gdb.linespec/Makefile.in: New file.
	* gdb.cp/templates.exp (test_template_breakpoints): Update for
	output changes.
	* gdb.cp/re-set-overloaded.exp: Remove kfail.
	* gdb.cp/ovldbreak.exp: Update for output changes.  "all" test now
	makes one breakpoint.
	* gdb.cp/method2.exp (test_break): Update for output changes.
	* gdb.cp/mb-templates.exp: Update for output changes.
	* gdb.cp/mb-inline.exp: Update for output changes.
	* gdb.cp/mb-ctor.exp: Update for output changes.
	* gdb.cp/ovsrch.exp: Use fully-qualified names.
	* gdb.base/solib-symbol.exp: Run to main later.  Breakpoint now
	has multiple matches.
	* gdb.base/sepdebug.exp: Disable pending breakpoints.  Update for
	error message change.
	* gdb.base/list.exp (test_list_filename_and_number): Update for
	error message change.
	* gdb.base/break.exp: Disable pending breakpoints.  Update for
	output changes.
	* configure.ac: Add gdb.linespec.
	* configure: Rebuild.
	* Makefile.in (ALL_SUBDIRS): Add gdb.linespec.
gdb/doc
2011-12-06  Tom Tromey  <tromey@redhat.com>

	* gdb.texinfo (Set Breaks): Update for new behavior.
2011-12-06 18:54:43 +00:00

1774 lines
46 KiB
C

/* Objective-C language support routines for GDB, the GNU debugger.
Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Contributed by Apple Computer, Inc.
Written by Michael Snyder.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "c-lang.h"
#include "objc-lang.h"
#include "exceptions.h"
#include "complaints.h"
#include "value.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdb_string.h" /* for strchr */
#include "target.h" /* for target_has_execution */
#include "gdbcore.h"
#include "gdbcmd.h"
#include "frame.h"
#include "gdb_regex.h"
#include "regcache.h"
#include "block.h"
#include "infcall.h"
#include "valprint.h"
#include "gdb_assert.h"
#include <ctype.h>
struct objc_object {
CORE_ADDR isa;
};
struct objc_class {
CORE_ADDR isa;
CORE_ADDR super_class;
CORE_ADDR name;
long version;
long info;
long instance_size;
CORE_ADDR ivars;
CORE_ADDR methods;
CORE_ADDR cache;
CORE_ADDR protocols;
};
struct objc_super {
CORE_ADDR receiver;
CORE_ADDR class;
};
struct objc_method {
CORE_ADDR name;
CORE_ADDR types;
CORE_ADDR imp;
};
static const struct objfile_data *objc_objfile_data;
/* Lookup a structure type named "struct NAME", visible in lexical
block BLOCK. If NOERR is nonzero, return zero if NAME is not
suitably defined. */
struct symbol *
lookup_struct_typedef (char *name, struct block *block, int noerr)
{
struct symbol *sym;
sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
if (sym == NULL)
{
if (noerr)
return 0;
else
error (_("No struct type named %s."), name);
}
if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
{
if (noerr)
return 0;
else
error (_("This context has class, union or enum %s, not a struct."),
name);
}
return sym;
}
CORE_ADDR
lookup_objc_class (struct gdbarch *gdbarch, char *classname)
{
struct type *char_type = builtin_type (gdbarch)->builtin_char;
struct value * function, *classval;
if (! target_has_execution)
{
/* Can't call into inferior to lookup class. */
return 0;
}
if (lookup_minimal_symbol("objc_lookUpClass", 0, 0))
function = find_function_in_inferior("objc_lookUpClass", NULL);
else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0))
function = find_function_in_inferior("objc_lookup_class", NULL);
else
{
complaint (&symfile_complaints,
_("no way to lookup Objective-C classes"));
return 0;
}
classval = value_string (classname, strlen (classname) + 1, char_type);
classval = value_coerce_array (classval);
return (CORE_ADDR) value_as_long (call_function_by_hand (function,
1, &classval));
}
CORE_ADDR
lookup_child_selector (struct gdbarch *gdbarch, char *selname)
{
struct type *char_type = builtin_type (gdbarch)->builtin_char;
struct value * function, *selstring;
if (! target_has_execution)
{
/* Can't call into inferior to lookup selector. */
return 0;
}
if (lookup_minimal_symbol("sel_getUid", 0, 0))
function = find_function_in_inferior("sel_getUid", NULL);
else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0))
function = find_function_in_inferior("sel_get_any_uid", NULL);
else
{
complaint (&symfile_complaints,
_("no way to lookup Objective-C selectors"));
return 0;
}
selstring = value_coerce_array (value_string (selname,
strlen (selname) + 1,
char_type));
return value_as_long (call_function_by_hand (function, 1, &selstring));
}
struct value *
value_nsstring (struct gdbarch *gdbarch, char *ptr, int len)
{
struct type *char_type = builtin_type (gdbarch)->builtin_char;
struct value *stringValue[3];
struct value *function, *nsstringValue;
struct symbol *sym;
struct type *type;
if (!target_has_execution)
return 0; /* Can't call into inferior to create NSString. */
stringValue[2] = value_string(ptr, len, char_type);
stringValue[2] = value_coerce_array(stringValue[2]);
/* _NSNewStringFromCString replaces "istr" after Lantern2A. */
if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0))
{
function = find_function_in_inferior("_NSNewStringFromCString", NULL);
nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
}
else if (lookup_minimal_symbol("istr", 0, 0))
{
function = find_function_in_inferior("istr", NULL);
nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
}
else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0))
{
function
= find_function_in_inferior("+[NSString stringWithCString:]", NULL);
type = builtin_type (gdbarch)->builtin_long;
stringValue[0] = value_from_longest
(type, lookup_objc_class (gdbarch, "NSString"));
stringValue[1] = value_from_longest
(type, lookup_child_selector (gdbarch, "stringWithCString:"));
nsstringValue = call_function_by_hand(function, 3, &stringValue[0]);
}
else
error (_("NSString: internal error -- no way to create new NSString"));
sym = lookup_struct_typedef("NSString", 0, 1);
if (sym == NULL)
sym = lookup_struct_typedef("NXString", 0, 1);
if (sym == NULL)
type = builtin_type (gdbarch)->builtin_data_ptr;
else
type = lookup_pointer_type(SYMBOL_TYPE (sym));
deprecated_set_value_type (nsstringValue, type);
return nsstringValue;
}
/* Objective-C name demangling. */
char *
objc_demangle (const char *mangled, int options)
{
char *demangled, *cp;
if (mangled[0] == '_' &&
(mangled[1] == 'i' || mangled[1] == 'c') &&
mangled[2] == '_')
{
cp = demangled = xmalloc(strlen(mangled) + 2);
if (mangled[1] == 'i')
*cp++ = '-'; /* for instance method */
else
*cp++ = '+'; /* for class method */
*cp++ = '['; /* opening left brace */
strcpy(cp, mangled+3); /* Tack on the rest of the mangled name. */
while (*cp && *cp == '_')
cp++; /* Skip any initial underbars in class
name. */
cp = strchr(cp, '_');
if (!cp) /* Find first non-initial underbar. */
{
xfree(demangled); /* not mangled name */
return NULL;
}
if (cp[1] == '_') /* Easy case: no category name. */
{
*cp++ = ' '; /* Replace two '_' with one ' '. */
strcpy(cp, mangled + (cp - demangled) + 2);
}
else
{
*cp++ = '('; /* Less easy case: category name. */
cp = strchr(cp, '_');
if (!cp)
{
xfree(demangled); /* not mangled name */
return NULL;
}
*cp++ = ')';
*cp++ = ' '; /* Overwriting 1st char of method name... */
strcpy(cp, mangled + (cp - demangled)); /* Get it back. */
}
while (*cp && *cp == '_')
cp++; /* Skip any initial underbars in
method name. */
for (; *cp; cp++)
if (*cp == '_')
*cp = ':'; /* Replace remaining '_' with ':'. */
*cp++ = ']'; /* closing right brace */
*cp++ = 0; /* string terminator */
return demangled;
}
else
return NULL; /* Not an objc mangled name. */
}
/* 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
objc_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
{
c &= 0xFF; /* Avoid sign bit follies. */
if (PRINT_LITERAL_FORM (c))
{
if (c == '\\' || c == quoter)
{
fputs_filtered ("\\", stream);
}
fprintf_filtered (stream, "%c", c);
}
else
{
switch (c)
{
case '\n':
fputs_filtered ("\\n", stream);
break;
case '\b':
fputs_filtered ("\\b", stream);
break;
case '\t':
fputs_filtered ("\\t", stream);
break;
case '\f':
fputs_filtered ("\\f", stream);
break;
case '\r':
fputs_filtered ("\\r", stream);
break;
case '\033':
fputs_filtered ("\\e", stream);
break;
case '\007':
fputs_filtered ("\\a", stream);
break;
default:
fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
break;
}
}
}
static void
objc_printchar (int c, struct type *type, struct ui_file *stream)
{
fputs_filtered ("'", stream);
objc_emit_char (c, type, stream, '\'');
fputs_filtered ("'", stream);
}
/* Print the character string STRING, printing at most LENGTH
characters. Printing stops early if the number hits print_max;
repeat counts are printed as appropriate. Print ellipses at the
end if we had to stop before printing LENGTH characters, or if
FORCE_ELLIPSES. */
static void
objc_printstr (struct ui_file *stream, struct type *type,
const gdb_byte *string, unsigned int length,
const char *encoding, int force_ellipses,
const struct value_print_options *options)
{
unsigned int i;
unsigned int things_printed = 0;
int in_quotes = 0;
int need_comma = 0;
/* If the string was not truncated due to `set print elements', and
the last byte of it is a null, we don't print that, in
traditional C style. */
if ((!force_ellipses) && length > 0 && string[length-1] == '\0')
length--;
if (length == 0)
{
fputs_filtered ("\"\"", stream);
return;
}
for (i = 0; i < length && things_printed < options->print_max; ++i)
{
/* Position of the character we are examining to see whether it
is repeated. */
unsigned int rep1;
/* Number of repetitions we have detected so far. */
unsigned int reps;
QUIT;
if (need_comma)
{
fputs_filtered (", ", stream);
need_comma = 0;
}
rep1 = i + 1;
reps = 1;
while (rep1 < length && string[rep1] == string[i])
{
++rep1;
++reps;
}
if (reps > options->repeat_count_threshold)
{
if (in_quotes)
{
if (options->inspect_it)
fputs_filtered ("\\\", ", stream);
else
fputs_filtered ("\", ", stream);
in_quotes = 0;
}
objc_printchar (string[i], type, stream);
fprintf_filtered (stream, " <repeats %u times>", reps);
i = rep1 - 1;
things_printed += options->repeat_count_threshold;
need_comma = 1;
}
else
{
if (!in_quotes)
{
if (options->inspect_it)
fputs_filtered ("\\\"", stream);
else
fputs_filtered ("\"", stream);
in_quotes = 1;
}
objc_emit_char (string[i], type, stream, '"');
++things_printed;
}
}
/* Terminate the quotes if necessary. */
if (in_quotes)
{
if (options->inspect_it)
fputs_filtered ("\\\"", stream);
else
fputs_filtered ("\"", stream);
}
if (force_ellipses || i < length)
fputs_filtered ("...", stream);
}
/* Determine if we are currently in the Objective-C dispatch function.
If so, get the address of the method function that the dispatcher
would call and use that as the function to step into instead. Also
skip over the trampoline for the function (if any). This is better
for the user since they are only interested in stepping into the
method function anyway. */
static CORE_ADDR
objc_skip_trampoline (struct frame_info *frame, CORE_ADDR stop_pc)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
CORE_ADDR real_stop_pc;
CORE_ADDR method_stop_pc;
real_stop_pc = gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc);
if (real_stop_pc != 0)
find_objc_msgcall (real_stop_pc, &method_stop_pc);
else
find_objc_msgcall (stop_pc, &method_stop_pc);
if (method_stop_pc)
{
real_stop_pc = gdbarch_skip_trampoline_code
(gdbarch, frame, method_stop_pc);
if (real_stop_pc == 0)
real_stop_pc = method_stop_pc;
}
return real_stop_pc;
}
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
static const struct op_print objc_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},
{"+", 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},
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
{"-", UNOP_NEG, PREC_PREFIX, 0},
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
{"*", UNOP_IND, PREC_PREFIX, 0},
{"&", UNOP_ADDR, PREC_PREFIX, 0},
{"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
{NULL, OP_NULL, PREC_NULL, 0}
};
const struct language_defn objc_language_defn = {
"objective-c", /* Language name */
language_objc,
range_check_off,
type_check_off,
case_sensitive_on,
array_row_major,
macro_expansion_c,
&exp_descriptor_standard,
objc_parse,
objc_error,
null_post_parser,
objc_printchar, /* Print a character constant */
objc_printstr, /* Function to print string constant */
objc_emit_char,
c_print_type, /* Print a type using appropriate syntax */
c_print_typedef, /* Print a typedef using appropriate syntax */
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
objc_skip_trampoline, /* Language specific skip_trampoline */
"self", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
objc_demangle, /* Language specific symbol demangler */
NULL, /* Language specific
class_name_from_physname */
objc_op_print_tab, /* Expression operators for printing */
1, /* C-style arrays */
0, /* String lower bound */
default_word_break_characters,
default_make_symbol_completion_list,
c_language_arch_info,
default_print_array_index,
default_pass_by_reference,
default_get_string,
strcmp_iw_ordered,
iterate_over_symbols,
LANG_MAGIC
};
/*
* ObjC:
* Following functions help construct Objective-C message calls.
*/
struct selname /* For parsing Objective-C. */
{
struct selname *next;
char *msglist_sel;
int msglist_len;
};
static int msglist_len;
static struct selname *selname_chain;
static char *msglist_sel;
void
start_msglist(void)
{
struct selname *new =
(struct selname *) xmalloc (sizeof (struct selname));
new->next = selname_chain;
new->msglist_len = msglist_len;
new->msglist_sel = msglist_sel;
msglist_len = 0;
msglist_sel = (char *)xmalloc(1);
*msglist_sel = 0;
selname_chain = new;
}
void
add_msglist(struct stoken *str, int addcolon)
{
char *s, *p;
int len, plen;
if (str == 0) /* Unnamed arg, or... */
{
if (addcolon == 0) /* variable number of args. */
{
msglist_len++;
return;
}
p = "";
plen = 0;
}
else
{
p = str->ptr;
plen = str->length;
}
len = plen + strlen(msglist_sel) + 2;
s = (char *)xmalloc(len);
strcpy(s, msglist_sel);
strncat(s, p, plen);
xfree(msglist_sel);
msglist_sel = s;
if (addcolon)
{
s[len-2] = ':';
s[len-1] = 0;
msglist_len++;
}
else
s[len-2] = '\0';
}
int
end_msglist(void)
{
int val = msglist_len;
struct selname *sel = selname_chain;
char *p = msglist_sel;
CORE_ADDR selid;
selname_chain = sel->next;
msglist_len = sel->msglist_len;
msglist_sel = sel->msglist_sel;
selid = lookup_child_selector (parse_gdbarch, p);
if (!selid)
error (_("Can't find selector \"%s\""), p);
write_exp_elt_longcst (selid);
xfree(p);
write_exp_elt_longcst (val); /* Number of args */
xfree(sel);
return val;
}
/*
* Function: specialcmp (char *a, char *b)
*
* Special strcmp: treats ']' and ' ' as end-of-string.
* Used for qsorting lists of objc methods (either by class or selector).
*/
static int
specialcmp (char *a, char *b)
{
while (*a && *a != ' ' && *a != ']' && *b && *b != ' ' && *b != ']')
{
if (*a != *b)
return *a - *b;
a++, b++;
}
if (*a && *a != ' ' && *a != ']')
return 1; /* a is longer therefore greater. */
if (*b && *b != ' ' && *b != ']')
return -1; /* a is shorter therefore lesser. */
return 0; /* a and b are identical. */
}
/*
* Function: compare_selectors (const void *, const void *)
*
* Comparison function for use with qsort. Arguments are symbols or
* msymbols Compares selector part of objc method name alphabetically.
*/
static int
compare_selectors (const void *a, const void *b)
{
char *aname, *bname;
aname = SYMBOL_PRINT_NAME (*(struct symbol **) a);
bname = SYMBOL_PRINT_NAME (*(struct symbol **) b);
if (aname == NULL || bname == NULL)
error (_("internal: compare_selectors(1)"));
aname = strchr(aname, ' ');
bname = strchr(bname, ' ');
if (aname == NULL || bname == NULL)
error (_("internal: compare_selectors(2)"));
return specialcmp (aname+1, bname+1);
}
/*
* Function: selectors_info (regexp, from_tty)
*
* Implements the "Info selectors" command. Takes an optional regexp
* arg. Lists all objective c selectors that match the regexp. Works
* by grepping thru all symbols for objective c methods. Output list
* is sorted and uniqued.
*/
static void
selectors_info (char *regexp, int from_tty)
{
struct objfile *objfile;
struct minimal_symbol *msymbol;
char *name;
char *val;
int matches = 0;
int maxlen = 0;
int ix;
char myregexp[2048];
char asel[256];
struct symbol **sym_arr;
int plusminus = 0;
if (regexp == NULL)
strcpy(myregexp, ".*]"); /* Null input, match all objc methods. */
else
{
if (*regexp == '+' || *regexp == '-')
{ /* User wants only class methods or only instance methods. */
plusminus = *regexp++;
while (*regexp == ' ' || *regexp == '\t')
regexp++;
}
if (*regexp == '\0')
strcpy(myregexp, ".*]");
else
{
/* Allow a few extra bytes because of the strcat below. */
if (sizeof (myregexp) < strlen (regexp) + 4)
error (_("Regexp is too long: %s"), regexp);
strcpy(myregexp, regexp);
if (myregexp[strlen(myregexp) - 1] == '$') /* end of selector */
myregexp[strlen(myregexp) - 1] = ']'; /* end of method name */
else
strcat(myregexp, ".*]");
}
}
if (regexp != NULL)
{
val = re_comp (myregexp);
if (val != 0)
error (_("Invalid regexp (%s): %s"), val, regexp);
}
/* First time thru is JUST to get max length and count. */
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name
&& (name[0] == '-' || name[0] == '+')
&& name[1] == '[') /* Got a method name. */
{
/* Filter for class/instance methods. */
if (plusminus && name[0] != plusminus)
continue;
/* Find selector part. */
name = (char *) strchr (name+2, ' ');
if (name == NULL)
{
complaint (&symfile_complaints,
_("Bad method name '%s'"),
SYMBOL_NATURAL_NAME (msymbol));
continue;
}
if (regexp == NULL || re_exec(++name) != 0)
{
char *mystart = name;
char *myend = (char *) strchr (mystart, ']');
if (myend && (myend - mystart > maxlen))
maxlen = myend - mystart; /* Get longest selector. */
matches++;
}
}
}
if (matches)
{
printf_filtered (_("Selectors matching \"%s\":\n\n"),
regexp ? regexp : "*");
sym_arr = alloca (matches * sizeof (struct symbol *));
matches = 0;
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[') /* Got a method name. */
{
/* Filter for class/instance methods. */
if (plusminus && name[0] != plusminus)
continue;
/* Find selector part. */
name = (char *) strchr(name+2, ' ');
if (regexp == NULL || re_exec(++name) != 0)
sym_arr[matches++] = (struct symbol *) msymbol;
}
}
qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
compare_selectors);
/* Prevent compare on first iteration. */
asel[0] = 0;
for (ix = 0; ix < matches; ix++) /* Now do the output. */
{
char *p = asel;
QUIT;
name = SYMBOL_NATURAL_NAME (sym_arr[ix]);
name = strchr (name, ' ') + 1;
if (p[0] && specialcmp(name, p) == 0)
continue; /* Seen this one already (not unique). */
/* Copy selector part. */
while (*name && *name != ']')
*p++ = *name++;
*p++ = '\0';
/* Print in columns. */
puts_filtered_tabular(asel, maxlen + 1, 0);
}
begin_line();
}
else
printf_filtered (_("No selectors matching \"%s\"\n"),
regexp ? regexp : "*");
}
/*
* Function: compare_classes (const void *, const void *)
*
* Comparison function for use with qsort. Arguments are symbols or
* msymbols Compares class part of objc method name alphabetically.
*/
static int
compare_classes (const void *a, const void *b)
{
char *aname, *bname;
aname = SYMBOL_PRINT_NAME (*(struct symbol **) a);
bname = SYMBOL_PRINT_NAME (*(struct symbol **) b);
if (aname == NULL || bname == NULL)
error (_("internal: compare_classes(1)"));
return specialcmp (aname+1, bname+1);
}
/*
* Function: classes_info(regexp, from_tty)
*
* Implements the "info classes" command for objective c classes.
* Lists all objective c classes that match the optional regexp.
* Works by grepping thru the list of objective c methods. List will
* be sorted and uniqued (since one class may have many methods).
* BUGS: will not list a class that has no methods.
*/
static void
classes_info (char *regexp, int from_tty)
{
struct objfile *objfile;
struct minimal_symbol *msymbol;
char *name;
char *val;
int matches = 0;
int maxlen = 0;
int ix;
char myregexp[2048];
char aclass[256];
struct symbol **sym_arr;
if (regexp == NULL)
strcpy(myregexp, ".* "); /* Null input: match all objc classes. */
else
{
/* Allow a few extra bytes because of the strcat below. */
if (sizeof (myregexp) < strlen (regexp) + 4)
error (_("Regexp is too long: %s"), regexp);
strcpy(myregexp, regexp);
if (myregexp[strlen(myregexp) - 1] == '$')
/* In the method name, the end of the class name is marked by ' '. */
myregexp[strlen(myregexp) - 1] = ' ';
else
strcat(myregexp, ".* ");
}
if (regexp != NULL)
{
val = re_comp (myregexp);
if (val != 0)
error (_("Invalid regexp (%s): %s"), val, regexp);
}
/* First time thru is JUST to get max length and count. */
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[') /* Got a method name. */
if (regexp == NULL || re_exec(name+2) != 0)
{
/* Compute length of classname part. */
char *mystart = name + 2;
char *myend = (char *) strchr(mystart, ' ');
if (myend && (myend - mystart > maxlen))
maxlen = myend - mystart;
matches++;
}
}
if (matches)
{
printf_filtered (_("Classes matching \"%s\":\n\n"),
regexp ? regexp : "*");
sym_arr = alloca (matches * sizeof (struct symbol *));
matches = 0;
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[') /* Got a method name. */
if (regexp == NULL || re_exec(name+2) != 0)
sym_arr[matches++] = (struct symbol *) msymbol;
}
qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
compare_classes);
/* Prevent compare on first iteration. */
aclass[0] = 0;
for (ix = 0; ix < matches; ix++) /* Now do the output. */
{
char *p = aclass;
QUIT;
name = SYMBOL_NATURAL_NAME (sym_arr[ix]);
name += 2;
if (p[0] && specialcmp(name, p) == 0)
continue; /* Seen this one already (not unique). */
/* Copy class part of method name. */
while (*name && *name != ' ')
*p++ = *name++;
*p++ = '\0';
/* Print in columns. */
puts_filtered_tabular(aclass, maxlen + 1, 0);
}
begin_line();
}
else
printf_filtered (_("No classes matching \"%s\"\n"), regexp ? regexp : "*");
}
static char *
parse_selector (char *method, char **selector)
{
char *s1 = NULL;
char *s2 = NULL;
int found_quote = 0;
char *nselector = NULL;
gdb_assert (selector != NULL);
s1 = method;
while (isspace (*s1))
s1++;
if (*s1 == '\'')
{
found_quote = 1;
s1++;
}
while (isspace (*s1))
s1++;
nselector = s1;
s2 = s1;
for (;;)
{
if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
*s1++ = *s2;
else if (isspace (*s2))
;
else if ((*s2 == '\0') || (*s2 == '\''))
break;
else
return NULL;
s2++;
}
*s1++ = '\0';
while (isspace (*s2))
s2++;
if (found_quote)
{
if (*s2 == '\'')
s2++;
while (isspace (*s2))
s2++;
}
if (selector != NULL)
*selector = nselector;
return s2;
}
static char *
parse_method (char *method, char *type, char **class,
char **category, char **selector)
{
char *s1 = NULL;
char *s2 = NULL;
int found_quote = 0;
char ntype = '\0';
char *nclass = NULL;
char *ncategory = NULL;
char *nselector = NULL;
gdb_assert (type != NULL);
gdb_assert (class != NULL);
gdb_assert (category != NULL);
gdb_assert (selector != NULL);
s1 = method;
while (isspace (*s1))
s1++;
if (*s1 == '\'')
{
found_quote = 1;
s1++;
}
while (isspace (*s1))
s1++;
if ((s1[0] == '+') || (s1[0] == '-'))
ntype = *s1++;
while (isspace (*s1))
s1++;
if (*s1 != '[')
return NULL;
s1++;
nclass = s1;
while (isalnum (*s1) || (*s1 == '_'))
s1++;
s2 = s1;
while (isspace (*s2))
s2++;
if (*s2 == '(')
{
s2++;
while (isspace (*s2))
s2++;
ncategory = s2;
while (isalnum (*s2) || (*s2 == '_'))
s2++;
*s2++ = '\0';
}
/* Truncate the class name now that we're not using the open paren. */
*s1++ = '\0';
nselector = s2;
s1 = s2;
for (;;)
{
if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
*s1++ = *s2;
else if (isspace (*s2))
;
else if (*s2 == ']')
break;
else
return NULL;
s2++;
}
*s1++ = '\0';
s2++;
while (isspace (*s2))
s2++;
if (found_quote)
{
if (*s2 != '\'')
return NULL;
s2++;
while (isspace (*s2))
s2++;
}
if (type != NULL)
*type = ntype;
if (class != NULL)
*class = nclass;
if (category != NULL)
*category = ncategory;
if (selector != NULL)
*selector = nselector;
return s2;
}
static void
find_methods (char type, const char *class, const char *category,
const char *selector,
VEC (const_char_ptr) **symbol_names)
{
struct objfile *objfile = NULL;
char *symname = NULL;
char ntype = '\0';
char *nclass = NULL;
char *ncategory = NULL;
char *nselector = NULL;
static char *tmp = NULL;
static unsigned int tmplen = 0;
gdb_assert (symbol_names != NULL);
ALL_OBJFILES (objfile)
{
unsigned int *objc_csym;
struct minimal_symbol *msymbol = NULL;
/* The objfile_csym variable counts the number of ObjC methods
that this objfile defines. We save that count as a private
objfile data. If we have already determined that this objfile
provides no ObjC methods, we can skip it entirely. */
unsigned int objfile_csym = 0;
objc_csym = objfile_data (objfile, objc_objfile_data);
if (objc_csym != NULL && *objc_csym == 0)
/* There are no ObjC symbols in this objfile. Skip it entirely. */
continue;
ALL_OBJFILE_MSYMBOLS (objfile, msymbol)
{
struct gdbarch *gdbarch = get_objfile_arch (objfile);
QUIT;
/* Check the symbol name first as this can be done entirely without
sending any query to the target. */
symname = SYMBOL_NATURAL_NAME (msymbol);
if (symname == NULL)
continue;
if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '['))
/* Not a method name. */
continue;
objfile_csym++;
/* Now that thinks are a bit sane, clean up the symname. */
while ((strlen (symname) + 1) >= tmplen)
{
tmplen = (tmplen == 0) ? 1024 : tmplen * 2;
tmp = xrealloc (tmp, tmplen);
}
strcpy (tmp, symname);
if (parse_method (tmp, &ntype, &nclass,
&ncategory, &nselector) == NULL)
continue;
if ((type != '\0') && (ntype != type))
continue;
if ((class != NULL)
&& ((nclass == NULL) || (strcmp (class, nclass) != 0)))
continue;
if ((category != NULL) &&
((ncategory == NULL) || (strcmp (category, ncategory) != 0)))
continue;
if ((selector != NULL) &&
((nselector == NULL) || (strcmp (selector, nselector) != 0)))
continue;
VEC_safe_push (const_char_ptr, *symbol_names, symname);
}
if (objc_csym == NULL)
{
objc_csym = obstack_alloc (&objfile->objfile_obstack,
sizeof (*objc_csym));
*objc_csym = objfile_csym;
set_objfile_data (objfile, objc_objfile_data, objc_csym);
}
else
/* Count of ObjC methods in this objfile should be constant. */
gdb_assert (*objc_csym == objfile_csym);
}
}
/* Uniquify a VEC of strings. */
static void
uniquify_strings (VEC (const_char_ptr) **strings)
{
int ix;
const char *elem, *last = NULL;
int out;
qsort (VEC_address (const_char_ptr, *strings),
VEC_length (const_char_ptr, *strings),
sizeof (const_char_ptr),
compare_strings);
out = 0;
for (ix = 0; VEC_iterate (const_char_ptr, *strings, ix, elem); ++ix)
{
if (last == NULL || strcmp (last, elem) != 0)
{
/* Keep ELEM. */
VEC_replace (const_char_ptr, *strings, out, elem);
++out;
}
last = elem;
}
VEC_truncate (const_char_ptr, *strings, out);
}
/*
* Function: find_imps (char *selector, struct symbol **sym_arr)
*
* Input: a string representing a selector
* a pointer to an array of symbol pointers
* possibly a pointer to a symbol found by the caller.
*
* Output: number of methods that implement that selector. Side
* effects: The array of symbol pointers is filled with matching syms.
*
* By analogy with function "find_methods" (symtab.c), builds a list
* of symbols matching the ambiguous input, so that "decode_line_2"
* (symtab.c) can list them and ask the user to choose one or more.
* In this case the matches are objective c methods
* ("implementations") matching an objective c selector.
*
* Note that it is possible for a normal (c-style) function to have
* the same name as an objective c selector. To prevent the selector
* from eclipsing the function, we allow the caller (decode_line_1) to
* search for such a function first, and if it finds one, pass it in
* to us. We will then integrate it into the list. We also search
* for one here, among the minsyms.
*
* NOTE: if NUM_DEBUGGABLE is non-zero, the sym_arr will be divided
* into two parts: debuggable (struct symbol) syms, and
* non_debuggable (struct minimal_symbol) syms. The debuggable
* ones will come first, before NUM_DEBUGGABLE (which will thus
* be the index of the first non-debuggable one).
*/
char *
find_imps (char *method, VEC (const_char_ptr) **symbol_names)
{
char type = '\0';
char *class = NULL;
char *category = NULL;
char *selector = NULL;
char *buf = NULL;
char *tmp = NULL;
int selector_case = 0;
gdb_assert (symbol_names != NULL);
buf = (char *) alloca (strlen (method) + 1);
strcpy (buf, method);
tmp = parse_method (buf, &type, &class, &category, &selector);
if (tmp == NULL)
{
strcpy (buf, method);
tmp = parse_selector (buf, &selector);
if (tmp == NULL)
return NULL;
selector_case = 1;
}
find_methods (type, class, category, selector, symbol_names);
/* If we hit the "selector" case, and we found some methods, then
add the selector itself as a symbol, if it exists. */
if (selector_case && !VEC_empty (const_char_ptr, *symbol_names))
{
struct symbol *sym = lookup_symbol (selector, NULL, VAR_DOMAIN, 0);
if (sym != NULL)
VEC_safe_push (const_char_ptr, *symbol_names,
SYMBOL_NATURAL_NAME (sym));
else
{
struct minimal_symbol *msym = lookup_minimal_symbol (selector, 0, 0);
if (msym != NULL)
VEC_safe_push (const_char_ptr, *symbol_names,
SYMBOL_NATURAL_NAME (msym));
}
}
uniquify_strings (symbol_names);
return method + (tmp - buf);
}
static void
print_object_command (char *args, int from_tty)
{
struct value *object, *function, *description;
CORE_ADDR string_addr, object_addr;
int i = 0;
gdb_byte c = 0;
if (!args || !*args)
error (
"The 'print-object' command requires an argument (an Objective-C object)");
{
struct expression *expr = parse_expression (args);
struct cleanup *old_chain =
make_cleanup (free_current_contents, &expr);
int pc = 0;
object = evaluate_subexp (builtin_type (expr->gdbarch)->builtin_data_ptr,
expr, &pc, EVAL_NORMAL);
do_cleanups (old_chain);
}
/* Validate the address for sanity. */
object_addr = value_as_long (object);
read_memory (object_addr, &c, 1);
function = find_function_in_inferior ("_NSPrintForDebugger", NULL);
if (function == NULL)
error (_("Unable to locate _NSPrintForDebugger in child process"));
description = call_function_by_hand (function, 1, &object);
string_addr = value_as_long (description);
if (string_addr == 0)
error (_("object returns null description"));
read_memory (string_addr + i++, &c, 1);
if (c != 0)
do
{ /* Read and print characters up to EOS. */
QUIT;
printf_filtered ("%c", c);
read_memory (string_addr + i++, &c, 1);
} while (c != 0);
else
printf_filtered(_("<object returns empty description>"));
printf_filtered ("\n");
}
/* The data structure 'methcalls' is used to detect method calls (thru
* ObjC runtime lib functions objc_msgSend, objc_msgSendSuper, etc.),
* and ultimately find the method being called.
*/
struct objc_methcall {
char *name;
/* Return instance method to be called. */
int (*stop_at) (CORE_ADDR, CORE_ADDR *);
/* Start of pc range corresponding to method invocation. */
CORE_ADDR begin;
/* End of pc range corresponding to method invocation. */
CORE_ADDR end;
};
static int resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc);
static int resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc);
static int resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc);
static int resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc);
static struct objc_methcall methcalls[] = {
{ "_objc_msgSend", resolve_msgsend, 0, 0},
{ "_objc_msgSend_stret", resolve_msgsend_stret, 0, 0},
{ "_objc_msgSendSuper", resolve_msgsend_super, 0, 0},
{ "_objc_msgSendSuper_stret", resolve_msgsend_super_stret, 0, 0},
{ "_objc_getClass", NULL, 0, 0},
{ "_objc_getMetaClass", NULL, 0, 0}
};
#define nmethcalls (sizeof (methcalls) / sizeof (methcalls[0]))
/* The following function, "find_objc_msgsend", fills in the data
* structure "objc_msgs" by finding the addresses of each of the
* (currently four) functions that it holds (of which objc_msgSend is
* the first). This must be called each time symbols are loaded, in
* case the functions have moved for some reason.
*/
static void
find_objc_msgsend (void)
{
unsigned int i;
for (i = 0; i < nmethcalls; i++)
{
struct minimal_symbol *func;
/* Try both with and without underscore. */
func = lookup_minimal_symbol (methcalls[i].name, NULL, NULL);
if ((func == NULL) && (methcalls[i].name[0] == '_'))
{
func = lookup_minimal_symbol (methcalls[i].name + 1, NULL, NULL);
}
if (func == NULL)
{
methcalls[i].begin = 0;
methcalls[i].end = 0;
continue;
}
methcalls[i].begin = SYMBOL_VALUE_ADDRESS (func);
do {
methcalls[i].end = SYMBOL_VALUE_ADDRESS (++func);
} while (methcalls[i].begin == methcalls[i].end);
}
}
/* find_objc_msgcall (replaces pc_off_limits)
*
* ALL that this function now does is to determine whether the input
* address ("pc") is the address of one of the Objective-C message
* dispatch functions (mainly objc_msgSend or objc_msgSendSuper), and
* if so, it returns the address of the method that will be called.
*
* The old function "pc_off_limits" used to do a lot of other things
* in addition, such as detecting shared library jump stubs and
* returning the address of the shlib function that would be called.
* That functionality has been moved into the gdbarch_skip_trampoline_code and
* IN_SOLIB_TRAMPOLINE macros, which are resolved in the target-
* dependent modules.
*/
struct objc_submethod_helper_data {
int (*f) (CORE_ADDR, CORE_ADDR *);
CORE_ADDR pc;
CORE_ADDR *new_pc;
};
static int
find_objc_msgcall_submethod_helper (void * arg)
{
struct objc_submethod_helper_data *s =
(struct objc_submethod_helper_data *) arg;
if (s->f (s->pc, s->new_pc) == 0)
return 1;
else
return 0;
}
static int
find_objc_msgcall_submethod (int (*f) (CORE_ADDR, CORE_ADDR *),
CORE_ADDR pc,
CORE_ADDR *new_pc)
{
struct objc_submethod_helper_data s;
s.f = f;
s.pc = pc;
s.new_pc = new_pc;
if (catch_errors (find_objc_msgcall_submethod_helper,
(void *) &s,
"Unable to determine target of "
"Objective-C method call (ignoring):\n",
RETURN_MASK_ALL) == 0)
return 1;
else
return 0;
}
int
find_objc_msgcall (CORE_ADDR pc, CORE_ADDR *new_pc)
{
unsigned int i;
find_objc_msgsend ();
if (new_pc != NULL)
{
*new_pc = 0;
}
for (i = 0; i < nmethcalls; i++)
if ((pc >= methcalls[i].begin) && (pc < methcalls[i].end))
{
if (methcalls[i].stop_at != NULL)
return find_objc_msgcall_submethod (methcalls[i].stop_at,
pc, new_pc);
else
return 0;
}
return 0;
}
/* -Wmissing-prototypes */
extern initialize_file_ftype _initialize_objc_language;
void
_initialize_objc_language (void)
{
add_language (&objc_language_defn);
add_info ("selectors", selectors_info, /* INFO SELECTORS command. */
_("All Objective-C selectors, or those matching REGEXP."));
add_info ("classes", classes_info, /* INFO CLASSES command. */
_("All Objective-C classes, or those matching REGEXP."));
add_com ("print-object", class_vars, print_object_command,
_("Ask an Objective-C object to print itself."));
add_com_alias ("po", "print-object", class_vars, 1);
}
static void
read_objc_method (struct gdbarch *gdbarch, CORE_ADDR addr,
struct objc_method *method)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
method->name = read_memory_unsigned_integer (addr + 0, 4, byte_order);
method->types = read_memory_unsigned_integer (addr + 4, 4, byte_order);
method->imp = read_memory_unsigned_integer (addr + 8, 4, byte_order);
}
static unsigned long
read_objc_methlist_nmethods (struct gdbarch *gdbarch, CORE_ADDR addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
return read_memory_unsigned_integer (addr + 4, 4, byte_order);
}
static void
read_objc_methlist_method (struct gdbarch *gdbarch, CORE_ADDR addr,
unsigned long num, struct objc_method *method)
{
gdb_assert (num < read_objc_methlist_nmethods (gdbarch, addr));
read_objc_method (gdbarch, addr + 8 + (12 * num), method);
}
static void
read_objc_object (struct gdbarch *gdbarch, CORE_ADDR addr,
struct objc_object *object)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
object->isa = read_memory_unsigned_integer (addr, 4, byte_order);
}
static void
read_objc_super (struct gdbarch *gdbarch, CORE_ADDR addr,
struct objc_super *super)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
super->receiver = read_memory_unsigned_integer (addr, 4, byte_order);
super->class = read_memory_unsigned_integer (addr + 4, 4, byte_order);
};
static void
read_objc_class (struct gdbarch *gdbarch, CORE_ADDR addr,
struct objc_class *class)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
class->isa = read_memory_unsigned_integer (addr, 4, byte_order);
class->super_class = read_memory_unsigned_integer (addr + 4, 4, byte_order);
class->name = read_memory_unsigned_integer (addr + 8, 4, byte_order);
class->version = read_memory_unsigned_integer (addr + 12, 4, byte_order);
class->info = read_memory_unsigned_integer (addr + 16, 4, byte_order);
class->instance_size = read_memory_unsigned_integer (addr + 18, 4,
byte_order);
class->ivars = read_memory_unsigned_integer (addr + 24, 4, byte_order);
class->methods = read_memory_unsigned_integer (addr + 28, 4, byte_order);
class->cache = read_memory_unsigned_integer (addr + 32, 4, byte_order);
class->protocols = read_memory_unsigned_integer (addr + 36, 4, byte_order);
}
static CORE_ADDR
find_implementation_from_class (struct gdbarch *gdbarch,
CORE_ADDR class, CORE_ADDR sel)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR subclass = class;
while (subclass != 0)
{
struct objc_class class_str;
unsigned mlistnum = 0;
read_objc_class (gdbarch, subclass, &class_str);
for (;;)
{
CORE_ADDR mlist;
unsigned long nmethods;
unsigned long i;
mlist = read_memory_unsigned_integer (class_str.methods +
(4 * mlistnum),
4, byte_order);
if (mlist == 0)
break;
nmethods = read_objc_methlist_nmethods (gdbarch, mlist);
for (i = 0; i < nmethods; i++)
{
struct objc_method meth_str;
read_objc_methlist_method (gdbarch, mlist, i, &meth_str);
#if 0
fprintf (stderr,
"checking method 0x%lx against selector 0x%lx\n",
meth_str.name, sel);
#endif
if (meth_str.name == sel)
/* FIXME: hppa arch was doing a pointer dereference
here. There needs to be a better way to do that. */
return meth_str.imp;
}
mlistnum++;
}
subclass = class_str.super_class;
}
return 0;
}
static CORE_ADDR
find_implementation (struct gdbarch *gdbarch,
CORE_ADDR object, CORE_ADDR sel)
{
struct objc_object ostr;
if (object == 0)
return 0;
read_objc_object (gdbarch, object, &ostr);
if (ostr.isa == 0)
return 0;
return find_implementation_from_class (gdbarch, ostr.isa, sel);
}
static int
resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc)
{
struct frame_info *frame = get_current_frame ();
struct gdbarch *gdbarch = get_frame_arch (frame);
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
CORE_ADDR object;
CORE_ADDR sel;
CORE_ADDR res;
object = gdbarch_fetch_pointer_argument (gdbarch, frame, 0, ptr_type);
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
res = find_implementation (gdbarch, object, sel);
if (new_pc != 0)
*new_pc = res;
if (res == 0)
return 1;
return 0;
}
static int
resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
{
struct frame_info *frame = get_current_frame ();
struct gdbarch *gdbarch = get_frame_arch (frame);
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
CORE_ADDR object;
CORE_ADDR sel;
CORE_ADDR res;
object = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 2, ptr_type);
res = find_implementation (gdbarch, object, sel);
if (new_pc != 0)
*new_pc = res;
if (res == 0)
return 1;
return 0;
}
static int
resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc)
{
struct frame_info *frame = get_current_frame ();
struct gdbarch *gdbarch = get_frame_arch (frame);
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
struct objc_super sstr;
CORE_ADDR super;
CORE_ADDR sel;
CORE_ADDR res;
super = gdbarch_fetch_pointer_argument (gdbarch, frame, 0, ptr_type);
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
read_objc_super (gdbarch, super, &sstr);
if (sstr.class == 0)
return 0;
res = find_implementation_from_class (gdbarch, sstr.class, sel);
if (new_pc != 0)
*new_pc = res;
if (res == 0)
return 1;
return 0;
}
static int
resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
{
struct frame_info *frame = get_current_frame ();
struct gdbarch *gdbarch = get_frame_arch (frame);
struct type *ptr_type = builtin_type (gdbarch)->builtin_func_ptr;
struct objc_super sstr;
CORE_ADDR super;
CORE_ADDR sel;
CORE_ADDR res;
super = gdbarch_fetch_pointer_argument (gdbarch, frame, 1, ptr_type);
sel = gdbarch_fetch_pointer_argument (gdbarch, frame, 2, ptr_type);
read_objc_super (gdbarch, super, &sstr);
if (sstr.class == 0)
return 0;
res = find_implementation_from_class (gdbarch, sstr.class, sel);
if (new_pc != 0)
*new_pc = res;
if (res == 0)
return 1;
return 0;
}
void
_initialize_objc_lang (void)
{
objc_objfile_data = register_objfile_data ();
}