60250e8b18
* exceptions.h (enum return_reason, RETURN_MASK) (RETURN_MASK_QUIT, RETURN_MASK_ERROR, RETURN_MASK_ALL) (return_mask, throw_exception, catch_exceptions_ftype) (catch_exceptions_with_msg, catch_errors_ftype, catch_errors) (catch_command_errors_ftype, catch_command_errors): Move to exceptions.h. * exceptions.c, exceptions.h: New files. * top.c: Do not include <setjmp.h>. (SIGJMP_BUF, SIGSETJMP, SIGLONGJMP, catch_return) (throw_exception, catcher, catch_exceptions) (catch_exceptions_with_msg, struct catch_errors_args) (do_catch_errors, catch_errors, struct captured_command_args) (do_captured_command, catch_command_errors): Move to exceptions.c. * wrapper.c, wince.c, win32-nat.c, utils.c: Include "exceptions.h". * tui/tui-interp.c, top.c, thread.c, symmisc.c: Ditto. * symfile-mem.c, stack.c, solib.c, rs6000-nat.c: Ditto. * remote-sds.c, remote-mips.c, remote-fileio.c: Ditto. * remote-e7000.c, objc-lang.c, ocd.c: Ditto. * remote.c, nto-procfs.c, monitor.c, mi/mi-main.c: Ditto. * main.c, m32r-rom.c, infrun.c, inf-loop.c: Ditto. * hppa-hpux-tdep.c, frame.c, event-top.c, event-loop.c: Ditto. * corelow.c, corefile.c, cli/cli-interp.c, breakpoint.c: Ditto. * ada-valprint.c, ada-lang.c: Ditto. * Makefile.in (HFILES_NO_SRCDIR, COMMON_OBS): Add exceptions.h and exceptions.o. Update all dependencies.
1931 lines
50 KiB
C
1931 lines
50 KiB
C
/* Objective-C language support routines for GDB, the GNU debugger.
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Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
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Contributed by Apple Computer, Inc.
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Written by Michael Snyder.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "c-lang.h"
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#include "objc-lang.h"
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#include "exceptions.h"
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#include "complaints.h"
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#include "value.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdb_string.h" /* for strchr */
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#include "target.h" /* for target_has_execution */
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "frame.h"
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#include "gdb_regex.h"
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#include "regcache.h"
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#include "block.h"
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#include "infcall.h"
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#include "valprint.h"
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#include "gdb_assert.h"
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#include <ctype.h>
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struct objc_object {
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CORE_ADDR isa;
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};
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struct objc_class {
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CORE_ADDR isa;
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CORE_ADDR super_class;
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CORE_ADDR name;
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long version;
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long info;
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long instance_size;
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CORE_ADDR ivars;
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CORE_ADDR methods;
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CORE_ADDR cache;
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CORE_ADDR protocols;
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};
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struct objc_super {
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CORE_ADDR receiver;
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CORE_ADDR class;
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};
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struct objc_method {
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CORE_ADDR name;
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CORE_ADDR types;
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CORE_ADDR imp;
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};
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/* Lookup a structure type named "struct NAME", visible in lexical
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block BLOCK. If NOERR is nonzero, return zero if NAME is not
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suitably defined. */
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struct symbol *
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lookup_struct_typedef (char *name, struct block *block, int noerr)
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{
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struct symbol *sym;
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sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0,
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(struct symtab **) NULL);
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if (sym == NULL)
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{
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if (noerr)
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return 0;
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else
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error ("No struct type named %s.", name);
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}
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if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
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{
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if (noerr)
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return 0;
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else
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error ("This context has class, union or enum %s, not a struct.",
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name);
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}
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return sym;
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}
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CORE_ADDR
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lookup_objc_class (char *classname)
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{
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struct value * function, *classval;
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if (! target_has_execution)
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{
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/* Can't call into inferior to lookup class. */
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return 0;
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}
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if (lookup_minimal_symbol("objc_lookUpClass", 0, 0))
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function = find_function_in_inferior("objc_lookUpClass");
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else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0))
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function = find_function_in_inferior("objc_lookup_class");
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else
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{
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complaint (&symfile_complaints, "no way to lookup Objective-C classes");
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return 0;
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}
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classval = value_string (classname, strlen (classname) + 1);
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classval = value_coerce_array (classval);
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return (CORE_ADDR) value_as_long (call_function_by_hand (function,
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1, &classval));
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}
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CORE_ADDR
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lookup_child_selector (char *selname)
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{
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struct value * function, *selstring;
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if (! target_has_execution)
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{
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/* Can't call into inferior to lookup selector. */
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return 0;
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}
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if (lookup_minimal_symbol("sel_getUid", 0, 0))
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function = find_function_in_inferior("sel_getUid");
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else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0))
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function = find_function_in_inferior("sel_get_any_uid");
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else
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{
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complaint (&symfile_complaints, "no way to lookup Objective-C selectors");
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return 0;
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}
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selstring = value_coerce_array (value_string (selname,
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strlen (selname) + 1));
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return value_as_long (call_function_by_hand (function, 1, &selstring));
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}
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struct value *
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value_nsstring (char *ptr, int len)
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{
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struct value *stringValue[3];
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struct value *function, *nsstringValue;
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struct symbol *sym;
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struct type *type;
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if (!target_has_execution)
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return 0; /* Can't call into inferior to create NSString. */
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sym = lookup_struct_typedef("NSString", 0, 1);
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if (sym == NULL)
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sym = lookup_struct_typedef("NXString", 0, 1);
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if (sym == NULL)
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type = lookup_pointer_type(builtin_type_void);
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else
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type = lookup_pointer_type(SYMBOL_TYPE (sym));
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stringValue[2] = value_string(ptr, len);
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stringValue[2] = value_coerce_array(stringValue[2]);
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/* _NSNewStringFromCString replaces "istr" after Lantern2A. */
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if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0))
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{
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function = find_function_in_inferior("_NSNewStringFromCString");
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nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
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}
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else if (lookup_minimal_symbol("istr", 0, 0))
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{
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function = find_function_in_inferior("istr");
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nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
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}
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else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0))
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{
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function = find_function_in_inferior("+[NSString stringWithCString:]");
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stringValue[0] = value_from_longest
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(builtin_type_long, lookup_objc_class ("NSString"));
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stringValue[1] = value_from_longest
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(builtin_type_long, lookup_child_selector ("stringWithCString:"));
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nsstringValue = call_function_by_hand(function, 3, &stringValue[0]);
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}
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else
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error ("NSString: internal error -- no way to create new NSString");
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nsstringValue->type = type;
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return nsstringValue;
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}
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/* Objective-C name demangling. */
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char *
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objc_demangle (const char *mangled, int options)
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{
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char *demangled, *cp;
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if (mangled[0] == '_' &&
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(mangled[1] == 'i' || mangled[1] == 'c') &&
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mangled[2] == '_')
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{
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cp = demangled = xmalloc(strlen(mangled) + 2);
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if (mangled[1] == 'i')
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*cp++ = '-'; /* for instance method */
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else
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*cp++ = '+'; /* for class method */
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*cp++ = '['; /* opening left brace */
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strcpy(cp, mangled+3); /* tack on the rest of the mangled name */
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while (*cp && *cp == '_')
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cp++; /* skip any initial underbars in class name */
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cp = strchr(cp, '_');
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if (!cp) /* find first non-initial underbar */
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{
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xfree(demangled); /* not mangled name */
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return NULL;
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}
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if (cp[1] == '_') { /* easy case: no category name */
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*cp++ = ' '; /* replace two '_' with one ' ' */
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strcpy(cp, mangled + (cp - demangled) + 2);
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}
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else {
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*cp++ = '('; /* less easy case: category name */
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cp = strchr(cp, '_');
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if (!cp)
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{
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xfree(demangled); /* not mangled name */
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return NULL;
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}
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*cp++ = ')';
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*cp++ = ' '; /* overwriting 1st char of method name... */
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strcpy(cp, mangled + (cp - demangled)); /* get it back */
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}
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while (*cp && *cp == '_')
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cp++; /* skip any initial underbars in method name */
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for (; *cp; cp++)
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if (*cp == '_')
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*cp = ':'; /* replace remaining '_' with ':' */
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*cp++ = ']'; /* closing right brace */
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*cp++ = 0; /* string terminator */
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return demangled;
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}
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else
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return NULL; /* Not an objc mangled name. */
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}
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/* Print the character C on STREAM as part of the contents of a
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literal string whose delimiter is QUOTER. Note that that format
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for printing characters and strings is language specific. */
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static void
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objc_emit_char (int c, struct ui_file *stream, int quoter)
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{
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c &= 0xFF; /* Avoid sign bit follies. */
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if (PRINT_LITERAL_FORM (c))
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{
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if (c == '\\' || c == quoter)
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{
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fputs_filtered ("\\", stream);
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}
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fprintf_filtered (stream, "%c", c);
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}
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else
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{
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switch (c)
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{
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case '\n':
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fputs_filtered ("\\n", stream);
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break;
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case '\b':
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fputs_filtered ("\\b", stream);
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break;
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case '\t':
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fputs_filtered ("\\t", stream);
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break;
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case '\f':
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fputs_filtered ("\\f", stream);
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break;
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case '\r':
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fputs_filtered ("\\r", stream);
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break;
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case '\033':
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fputs_filtered ("\\e", stream);
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break;
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case '\007':
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fputs_filtered ("\\a", stream);
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break;
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default:
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fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
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break;
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}
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}
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}
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static void
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objc_printchar (int c, struct ui_file *stream)
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{
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fputs_filtered ("'", stream);
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objc_emit_char (c, stream, '\'');
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fputs_filtered ("'", stream);
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}
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|
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/* Print the character string STRING, printing at most LENGTH
|
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characters. Printing stops early if the number hits print_max;
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repeat counts are printed as appropriate. Print ellipses at the
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end if we had to stop before printing LENGTH characters, or if
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FORCE_ELLIPSES. */
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|
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static void
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objc_printstr (struct ui_file *stream, char *string,
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unsigned int length, int width, int force_ellipses)
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|
{
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unsigned int i;
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unsigned int things_printed = 0;
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int in_quotes = 0;
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|
int need_comma = 0;
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|
|
/* If the string was not truncated due to `set print elements', and
|
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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')
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length--;
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|
|
if (length == 0)
|
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{
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fputs_filtered ("\"\"", stream);
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return;
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}
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|
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for (i = 0; i < length && things_printed < print_max; ++i)
|
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{
|
|
/* Position of the character we are examining to see whether it
|
|
is repeated. */
|
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unsigned int rep1;
|
|
/* Number of repetitions we have detected so far. */
|
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unsigned int reps;
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QUIT;
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if (need_comma)
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{
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fputs_filtered (", ", stream);
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need_comma = 0;
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}
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rep1 = i + 1;
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reps = 1;
|
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while (rep1 < length && string[rep1] == string[i])
|
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{
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++rep1;
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++reps;
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|
}
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|
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if (reps > repeat_count_threshold)
|
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{
|
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if (in_quotes)
|
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{
|
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if (inspect_it)
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fputs_filtered ("\\\", ", stream);
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else
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fputs_filtered ("\", ", stream);
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in_quotes = 0;
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}
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objc_printchar (string[i], stream);
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fprintf_filtered (stream, " <repeats %u times>", reps);
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i = rep1 - 1;
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things_printed += repeat_count_threshold;
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need_comma = 1;
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}
|
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else
|
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{
|
|
if (!in_quotes)
|
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{
|
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if (inspect_it)
|
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fputs_filtered ("\\\"", stream);
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|
else
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fputs_filtered ("\"", stream);
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in_quotes = 1;
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}
|
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objc_emit_char (string[i], stream, '"');
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++things_printed;
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}
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}
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|
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/* Terminate the quotes if necessary. */
|
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if (in_quotes)
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{
|
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if (inspect_it)
|
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fputs_filtered ("\\\"", stream);
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else
|
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fputs_filtered ("\"", stream);
|
|
}
|
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|
|
if (force_ellipses || i < length)
|
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fputs_filtered ("...", stream);
|
|
}
|
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|
|
/* Create a fundamental C type using default reasonable for the
|
|
current target.
|
|
|
|
Some object/debugging file formats (DWARF version 1, COFF, etc) do
|
|
not define fundamental types such as "int" or "double". Others
|
|
(stabs or DWARF version 2, etc) do define fundamental types. For
|
|
the formats which don't provide fundamental types, gdb can create
|
|
such types using this function.
|
|
|
|
FIXME: Some compilers distinguish explicitly signed integral types
|
|
(signed short, signed int, signed long) from "regular" integral
|
|
types (short, int, long) in the debugging information. There is
|
|
some disagreement as to how useful this feature is. In particular,
|
|
gcc does not support this. Also, only some debugging formats allow
|
|
the distinction to be passed on to a debugger. For now, we always
|
|
just use "short", "int", or "long" as the type name, for both the
|
|
implicit and explicitly signed types. This also makes life easier
|
|
for the gdb test suite since we don't have to account for the
|
|
differences in output depending upon what the compiler and
|
|
debugging format support. We will probably have to re-examine the
|
|
issue when gdb starts taking it's fundamental type information
|
|
directly from the debugging information supplied by the compiler.
|
|
fnf@cygnus.com */
|
|
|
|
static struct type *
|
|
objc_create_fundamental_type (struct objfile *objfile, int typeid)
|
|
{
|
|
struct type *type = NULL;
|
|
|
|
switch (typeid)
|
|
{
|
|
default:
|
|
/* FIXME: For now, if we are asked to produce a type not in
|
|
this language, create the equivalent of a C integer type
|
|
with the name "<?type?>". When all the dust settles from
|
|
the type reconstruction work, this should probably become
|
|
an error. */
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
|
0, "<?type?>", objfile);
|
|
warning ("internal error: no C/C++ fundamental type %d", typeid);
|
|
break;
|
|
case FT_VOID:
|
|
type = init_type (TYPE_CODE_VOID,
|
|
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
|
0, "void", objfile);
|
|
break;
|
|
case FT_CHAR:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
|
0, "char", objfile);
|
|
break;
|
|
case FT_SIGNED_CHAR:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
|
0, "signed char", objfile);
|
|
break;
|
|
case FT_UNSIGNED_CHAR:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
|
TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
|
|
break;
|
|
case FT_SHORT:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
|
0, "short", objfile);
|
|
break;
|
|
case FT_SIGNED_SHORT:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
|
0, "short", objfile); /* FIXME-fnf */
|
|
break;
|
|
case FT_UNSIGNED_SHORT:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
|
TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
|
|
break;
|
|
case FT_INTEGER:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
|
0, "int", objfile);
|
|
break;
|
|
case FT_SIGNED_INTEGER:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
|
0, "int", objfile); /* FIXME -fnf */
|
|
break;
|
|
case FT_UNSIGNED_INTEGER:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
|
TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
|
|
break;
|
|
case FT_LONG:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
|
0, "long", objfile);
|
|
break;
|
|
case FT_SIGNED_LONG:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
|
0, "long", objfile); /* FIXME -fnf */
|
|
break;
|
|
case FT_UNSIGNED_LONG:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
|
TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
|
|
break;
|
|
case FT_LONG_LONG:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
|
0, "long long", objfile);
|
|
break;
|
|
case FT_SIGNED_LONG_LONG:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
|
0, "signed long long", objfile);
|
|
break;
|
|
case FT_UNSIGNED_LONG_LONG:
|
|
type = init_type (TYPE_CODE_INT,
|
|
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
|
TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
|
|
break;
|
|
case FT_FLOAT:
|
|
type = init_type (TYPE_CODE_FLT,
|
|
TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
|
|
0, "float", objfile);
|
|
break;
|
|
case FT_DBL_PREC_FLOAT:
|
|
type = init_type (TYPE_CODE_FLT,
|
|
TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
|
|
0, "double", objfile);
|
|
break;
|
|
case FT_EXT_PREC_FLOAT:
|
|
type = init_type (TYPE_CODE_FLT,
|
|
TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
|
|
0, "long double", objfile);
|
|
break;
|
|
}
|
|
return (type);
|
|
}
|
|
|
|
/* 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 (CORE_ADDR stop_pc)
|
|
{
|
|
CORE_ADDR real_stop_pc;
|
|
CORE_ADDR method_stop_pc;
|
|
|
|
real_stop_pc = SKIP_TRAMPOLINE_CODE (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 = SKIP_TRAMPOLINE_CODE (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}
|
|
};
|
|
|
|
struct type ** const (objc_builtin_types[]) =
|
|
{
|
|
&builtin_type_int,
|
|
&builtin_type_long,
|
|
&builtin_type_short,
|
|
&builtin_type_char,
|
|
&builtin_type_float,
|
|
&builtin_type_double,
|
|
&builtin_type_void,
|
|
&builtin_type_long_long,
|
|
&builtin_type_signed_char,
|
|
&builtin_type_unsigned_char,
|
|
&builtin_type_unsigned_short,
|
|
&builtin_type_unsigned_int,
|
|
&builtin_type_unsigned_long,
|
|
&builtin_type_unsigned_long_long,
|
|
&builtin_type_long_double,
|
|
&builtin_type_complex,
|
|
&builtin_type_double_complex,
|
|
0
|
|
};
|
|
|
|
const struct language_defn objc_language_defn = {
|
|
"objective-c", /* Language name */
|
|
language_objc,
|
|
objc_builtin_types,
|
|
range_check_off,
|
|
type_check_off,
|
|
case_sensitive_on,
|
|
array_row_major,
|
|
&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,
|
|
objc_create_fundamental_type, /* Create fundamental type in this language */
|
|
c_print_type, /* Print a type 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 */
|
|
value_of_this, /* value_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 */
|
|
&builtin_type_char, /* Type of string elements */
|
|
default_word_break_characters,
|
|
NULL, /* FIXME: la_language_arch_info. */
|
|
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(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
|
|
{
|
|
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 (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
|
|
{
|
|
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 : "*");
|
|
}
|
|
|
|
/*
|
|
* 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).
|
|
*/
|
|
|
|
/*
|
|
* Function: total_number_of_imps (char *selector);
|
|
*
|
|
* Input: a string representing a selector
|
|
* Output: number of methods that implement that selector.
|
|
*
|
|
* By analogy with function "total_number_of_methods", this allows
|
|
* decode_line_1 (symtab.c) to detect if there are objective c methods
|
|
* matching the input, and to allocate an array of pointers to them
|
|
* which can be manipulated by "decode_line_2" (also in symtab.c).
|
|
*/
|
|
|
|
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;
|
|
}
|
|
|
|
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 (struct symtab *symtab, char type,
|
|
const char *class, const char *category,
|
|
const char *selector, struct symbol **syms,
|
|
unsigned int *nsym, unsigned int *ndebug)
|
|
{
|
|
struct objfile *objfile = NULL;
|
|
struct minimal_symbol *msymbol = NULL;
|
|
struct block *block = NULL;
|
|
struct symbol *sym = NULL;
|
|
|
|
char *symname = NULL;
|
|
|
|
char ntype = '\0';
|
|
char *nclass = NULL;
|
|
char *ncategory = NULL;
|
|
char *nselector = NULL;
|
|
|
|
unsigned int csym = 0;
|
|
unsigned int cdebug = 0;
|
|
|
|
static char *tmp = NULL;
|
|
static unsigned int tmplen = 0;
|
|
|
|
gdb_assert (nsym != NULL);
|
|
gdb_assert (ndebug != NULL);
|
|
|
|
if (symtab)
|
|
block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
|
|
|
|
ALL_MSYMBOLS (objfile, msymbol)
|
|
{
|
|
QUIT;
|
|
|
|
if ((msymbol->type != mst_text) && (msymbol->type != mst_file_text))
|
|
/* Not a function or method. */
|
|
continue;
|
|
|
|
if (symtab)
|
|
if ((SYMBOL_VALUE_ADDRESS (msymbol) < BLOCK_START (block)) ||
|
|
(SYMBOL_VALUE_ADDRESS (msymbol) >= BLOCK_END (block)))
|
|
/* Not in the specified symtab. */
|
|
continue;
|
|
|
|
symname = SYMBOL_NATURAL_NAME (msymbol);
|
|
if (symname == NULL)
|
|
continue;
|
|
|
|
if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '['))
|
|
/* Not a method name. */
|
|
continue;
|
|
|
|
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;
|
|
|
|
sym = find_pc_function (SYMBOL_VALUE_ADDRESS (msymbol));
|
|
if (sym != NULL)
|
|
{
|
|
const char *newsymname = SYMBOL_NATURAL_NAME (sym);
|
|
|
|
if (strcmp (symname, newsymname) == 0)
|
|
{
|
|
/* Found a high-level method sym: swap it into the
|
|
lower part of sym_arr (below num_debuggable). */
|
|
if (syms != NULL)
|
|
{
|
|
syms[csym] = syms[cdebug];
|
|
syms[cdebug] = sym;
|
|
}
|
|
csym++;
|
|
cdebug++;
|
|
}
|
|
else
|
|
{
|
|
warning (
|
|
"debugging symbol \"%s\" does not match minimal symbol (\"%s\"); ignoring",
|
|
newsymname, symname);
|
|
if (syms != NULL)
|
|
syms[csym] = (struct symbol *) msymbol;
|
|
csym++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Found a non-debuggable method symbol. */
|
|
if (syms != NULL)
|
|
syms[csym] = (struct symbol *) msymbol;
|
|
csym++;
|
|
}
|
|
}
|
|
|
|
if (nsym != NULL)
|
|
*nsym = csym;
|
|
if (ndebug != NULL)
|
|
*ndebug = cdebug;
|
|
}
|
|
|
|
char *find_imps (struct symtab *symtab, struct block *block,
|
|
char *method, struct symbol **syms,
|
|
unsigned int *nsym, unsigned int *ndebug)
|
|
{
|
|
char type = '\0';
|
|
char *class = NULL;
|
|
char *category = NULL;
|
|
char *selector = NULL;
|
|
|
|
unsigned int csym = 0;
|
|
unsigned int cdebug = 0;
|
|
|
|
unsigned int ncsym = 0;
|
|
unsigned int ncdebug = 0;
|
|
|
|
char *buf = NULL;
|
|
char *tmp = NULL;
|
|
|
|
gdb_assert (nsym != NULL);
|
|
gdb_assert (ndebug != NULL);
|
|
|
|
if (nsym != NULL)
|
|
*nsym = 0;
|
|
if (ndebug != NULL)
|
|
*ndebug = 0;
|
|
|
|
buf = (char *) alloca (strlen (method) + 1);
|
|
strcpy (buf, method);
|
|
tmp = parse_method (buf, &type, &class, &category, &selector);
|
|
|
|
if (tmp == NULL) {
|
|
|
|
struct symbol *sym = NULL;
|
|
struct minimal_symbol *msym = NULL;
|
|
|
|
strcpy (buf, method);
|
|
tmp = parse_selector (buf, &selector);
|
|
|
|
if (tmp == NULL)
|
|
return NULL;
|
|
|
|
sym = lookup_symbol (selector, block, VAR_DOMAIN, 0, NULL);
|
|
if (sym != NULL)
|
|
{
|
|
if (syms)
|
|
syms[csym] = sym;
|
|
csym++;
|
|
cdebug++;
|
|
}
|
|
|
|
if (sym == NULL)
|
|
msym = lookup_minimal_symbol (selector, 0, 0);
|
|
|
|
if (msym != NULL)
|
|
{
|
|
if (syms)
|
|
syms[csym] = (struct symbol *)msym;
|
|
csym++;
|
|
}
|
|
}
|
|
|
|
if (syms != NULL)
|
|
find_methods (symtab, type, class, category, selector,
|
|
syms + csym, &ncsym, &ncdebug);
|
|
else
|
|
find_methods (symtab, type, class, category, selector,
|
|
NULL, &ncsym, &ncdebug);
|
|
|
|
/* If we didn't find any methods, just return. */
|
|
if (ncsym == 0 && ncdebug == 0)
|
|
return method;
|
|
|
|
/* Take debug symbols from the second batch of symbols and swap them
|
|
* with debug symbols from the first batch. Repeat until either the
|
|
* second section is out of debug symbols or the first section is
|
|
* full of debug symbols. Either way we have all debug symbols
|
|
* packed to the beginning of the buffer.
|
|
*/
|
|
|
|
if (syms != NULL)
|
|
{
|
|
while ((cdebug < csym) && (ncdebug > 0))
|
|
{
|
|
struct symbol *s = NULL;
|
|
/* First non-debugging symbol. */
|
|
unsigned int i = cdebug;
|
|
/* Last of second batch of debug symbols. */
|
|
unsigned int j = csym + ncdebug - 1;
|
|
|
|
s = syms[j];
|
|
syms[j] = syms[i];
|
|
syms[i] = s;
|
|
|
|
/* We've moved a symbol from the second debug section to the
|
|
first one. */
|
|
cdebug++;
|
|
ncdebug--;
|
|
}
|
|
}
|
|
|
|
csym += ncsym;
|
|
cdebug += ncdebug;
|
|
|
|
if (nsym != NULL)
|
|
*nsym = csym;
|
|
if (ndebug != NULL)
|
|
*ndebug = cdebug;
|
|
|
|
if (syms == NULL)
|
|
return method + (tmp - buf);
|
|
|
|
if (csym > 1)
|
|
{
|
|
/* Sort debuggable symbols. */
|
|
if (cdebug > 1)
|
|
qsort (syms, cdebug, sizeof (struct minimal_symbol *),
|
|
compare_classes);
|
|
|
|
/* Sort minimal_symbols. */
|
|
if ((csym - cdebug) > 1)
|
|
qsort (&syms[cdebug], csym - cdebug,
|
|
sizeof (struct minimal_symbol *), compare_classes);
|
|
}
|
|
/* Terminate the sym_arr list. */
|
|
syms[csym] = 0;
|
|
|
|
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;
|
|
char c = -1;
|
|
|
|
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 = expr->language_defn->la_exp_desc->evaluate_exp
|
|
(builtin_type_void_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");
|
|
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 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;
|
|
}
|
|
|
|
extern initialize_file_ftype _initialize_objc_language; /* -Wmissing-prototypes */
|
|
|
|
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 (CORE_ADDR addr, struct objc_method *method)
|
|
{
|
|
method->name = read_memory_unsigned_integer (addr + 0, 4);
|
|
method->types = read_memory_unsigned_integer (addr + 4, 4);
|
|
method->imp = read_memory_unsigned_integer (addr + 8, 4);
|
|
}
|
|
|
|
static
|
|
unsigned long read_objc_methlist_nmethods (CORE_ADDR addr)
|
|
{
|
|
return read_memory_unsigned_integer (addr + 4, 4);
|
|
}
|
|
|
|
static void
|
|
read_objc_methlist_method (CORE_ADDR addr, unsigned long num,
|
|
struct objc_method *method)
|
|
{
|
|
gdb_assert (num < read_objc_methlist_nmethods (addr));
|
|
read_objc_method (addr + 8 + (12 * num), method);
|
|
}
|
|
|
|
static void
|
|
read_objc_object (CORE_ADDR addr, struct objc_object *object)
|
|
{
|
|
object->isa = read_memory_unsigned_integer (addr, 4);
|
|
}
|
|
|
|
static void
|
|
read_objc_super (CORE_ADDR addr, struct objc_super *super)
|
|
{
|
|
super->receiver = read_memory_unsigned_integer (addr, 4);
|
|
super->class = read_memory_unsigned_integer (addr + 4, 4);
|
|
};
|
|
|
|
static void
|
|
read_objc_class (CORE_ADDR addr, struct objc_class *class)
|
|
{
|
|
class->isa = read_memory_unsigned_integer (addr, 4);
|
|
class->super_class = read_memory_unsigned_integer (addr + 4, 4);
|
|
class->name = read_memory_unsigned_integer (addr + 8, 4);
|
|
class->version = read_memory_unsigned_integer (addr + 12, 4);
|
|
class->info = read_memory_unsigned_integer (addr + 16, 4);
|
|
class->instance_size = read_memory_unsigned_integer (addr + 18, 4);
|
|
class->ivars = read_memory_unsigned_integer (addr + 24, 4);
|
|
class->methods = read_memory_unsigned_integer (addr + 28, 4);
|
|
class->cache = read_memory_unsigned_integer (addr + 32, 4);
|
|
class->protocols = read_memory_unsigned_integer (addr + 36, 4);
|
|
}
|
|
|
|
static CORE_ADDR
|
|
find_implementation_from_class (CORE_ADDR class, CORE_ADDR sel)
|
|
{
|
|
CORE_ADDR subclass = class;
|
|
|
|
while (subclass != 0)
|
|
{
|
|
|
|
struct objc_class class_str;
|
|
unsigned mlistnum = 0;
|
|
|
|
read_objc_class (subclass, &class_str);
|
|
|
|
for (;;)
|
|
{
|
|
CORE_ADDR mlist;
|
|
unsigned long nmethods;
|
|
unsigned long i;
|
|
|
|
mlist = read_memory_unsigned_integer (class_str.methods +
|
|
(4 * mlistnum), 4);
|
|
if (mlist == 0)
|
|
break;
|
|
|
|
nmethods = read_objc_methlist_nmethods (mlist);
|
|
|
|
for (i = 0; i < nmethods; i++)
|
|
{
|
|
struct objc_method meth_str;
|
|
read_objc_methlist_method (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 (CORE_ADDR object, CORE_ADDR sel)
|
|
{
|
|
struct objc_object ostr;
|
|
|
|
if (object == 0)
|
|
return 0;
|
|
read_objc_object (object, &ostr);
|
|
if (ostr.isa == 0)
|
|
return 0;
|
|
|
|
return find_implementation_from_class (ostr.isa, sel);
|
|
}
|
|
|
|
#define OBJC_FETCH_POINTER_ARGUMENT(argi) \
|
|
FETCH_POINTER_ARGUMENT (get_current_frame (), argi, builtin_type_void_func_ptr)
|
|
|
|
static int
|
|
resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc)
|
|
{
|
|
CORE_ADDR object;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
object = OBJC_FETCH_POINTER_ARGUMENT (0);
|
|
sel = OBJC_FETCH_POINTER_ARGUMENT (1);
|
|
|
|
res = find_implementation (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)
|
|
{
|
|
CORE_ADDR object;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
object = OBJC_FETCH_POINTER_ARGUMENT (1);
|
|
sel = OBJC_FETCH_POINTER_ARGUMENT (2);
|
|
|
|
res = find_implementation (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 objc_super sstr;
|
|
|
|
CORE_ADDR super;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
super = OBJC_FETCH_POINTER_ARGUMENT (0);
|
|
sel = OBJC_FETCH_POINTER_ARGUMENT (1);
|
|
|
|
read_objc_super (super, &sstr);
|
|
if (sstr.class == 0)
|
|
return 0;
|
|
|
|
res = find_implementation_from_class (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 objc_super sstr;
|
|
|
|
CORE_ADDR super;
|
|
CORE_ADDR sel;
|
|
CORE_ADDR res;
|
|
|
|
super = OBJC_FETCH_POINTER_ARGUMENT (1);
|
|
sel = OBJC_FETCH_POINTER_ARGUMENT (2);
|
|
|
|
read_objc_super (super, &sstr);
|
|
if (sstr.class == 0)
|
|
return 0;
|
|
|
|
res = find_implementation_from_class (sstr.class, sel);
|
|
if (new_pc != 0)
|
|
*new_pc = res;
|
|
if (res == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|