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4786 lines
140 KiB
C
4786 lines
140 KiB
C
/* Symbol table lookup for the GNU debugger, GDB.
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Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
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1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009
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Free Software Foundation, Inc.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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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 "gdbcore.h"
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#include "frame.h"
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#include "target.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 "gdbcmd.h"
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#include "call-cmds.h"
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#include "gdb_regex.h"
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#include "expression.h"
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#include "language.h"
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#include "demangle.h"
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#include "inferior.h"
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#include "linespec.h"
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#include "source.h"
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#include "filenames.h" /* for FILENAME_CMP */
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#include "objc-lang.h"
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#include "ada-lang.h"
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#include "p-lang.h"
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#include "addrmap.h"
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#include "hashtab.h"
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#include "gdb_obstack.h"
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#include "block.h"
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#include "dictionary.h"
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#include <sys/types.h>
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#include <fcntl.h>
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#include "gdb_string.h"
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#include "gdb_stat.h"
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#include <ctype.h>
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#include "cp-abi.h"
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#include "cp-support.h"
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#include "observer.h"
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#include "gdb_assert.h"
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#include "solist.h"
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#include "macrotab.h"
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#include "macroscope.h"
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/* Prototypes for local functions */
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static void completion_list_add_name (char *, char *, int, char *, char *);
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static void rbreak_command (char *, int);
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static void types_info (char *, int);
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static void functions_info (char *, int);
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static void variables_info (char *, int);
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static void sources_info (char *, int);
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static void output_source_filename (const char *, int *);
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static int find_line_common (struct linetable *, int, int *);
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/* This one is used by linespec.c */
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char *operator_chars (char *p, char **end);
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static struct symbol *lookup_symbol_aux (const char *name,
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const char *linkage_name,
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const struct block *block,
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const domain_enum domain,
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enum language language,
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int *is_a_field_of_this);
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static
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struct symbol *lookup_symbol_aux_local (const char *name,
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const char *linkage_name,
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const struct block *block,
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const domain_enum domain);
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static
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struct symbol *lookup_symbol_aux_symtabs (int block_index,
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const char *name,
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const char *linkage_name,
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const domain_enum domain);
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static
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struct symbol *lookup_symbol_aux_psymtabs (int block_index,
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const char *name,
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const char *linkage_name,
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const domain_enum domain);
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static int file_matches (char *, char **, int);
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static void print_symbol_info (domain_enum,
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struct symtab *, struct symbol *, int, char *);
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static void print_msymbol_info (struct minimal_symbol *);
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static void symtab_symbol_info (char *, domain_enum, int);
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void _initialize_symtab (void);
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/* */
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/* Allow the user to configure the debugger behavior with respect
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to multiple-choice menus when more than one symbol matches during
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a symbol lookup. */
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const char multiple_symbols_ask[] = "ask";
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const char multiple_symbols_all[] = "all";
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const char multiple_symbols_cancel[] = "cancel";
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static const char *multiple_symbols_modes[] =
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{
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multiple_symbols_ask,
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multiple_symbols_all,
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multiple_symbols_cancel,
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NULL
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};
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static const char *multiple_symbols_mode = multiple_symbols_all;
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/* Read-only accessor to AUTO_SELECT_MODE. */
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const char *
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multiple_symbols_select_mode (void)
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{
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return multiple_symbols_mode;
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}
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/* Block in which the most recently searched-for symbol was found.
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Might be better to make this a parameter to lookup_symbol and
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value_of_this. */
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const struct block *block_found;
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/* Check for a symtab of a specific name; first in symtabs, then in
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psymtabs. *If* there is no '/' in the name, a match after a '/'
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in the symtab filename will also work. */
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struct symtab *
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lookup_symtab (const char *name)
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{
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struct symtab *s;
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struct partial_symtab *ps;
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struct objfile *objfile;
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char *real_path = NULL;
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char *full_path = NULL;
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/* Here we are interested in canonicalizing an absolute path, not
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absolutizing a relative path. */
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if (IS_ABSOLUTE_PATH (name))
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{
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full_path = xfullpath (name);
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make_cleanup (xfree, full_path);
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real_path = gdb_realpath (name);
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make_cleanup (xfree, real_path);
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}
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got_symtab:
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/* First, search for an exact match */
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ALL_SYMTABS (objfile, s)
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{
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if (FILENAME_CMP (name, s->filename) == 0)
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{
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return s;
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}
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/* If the user gave us an absolute path, try to find the file in
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this symtab and use its absolute path. */
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if (full_path != NULL)
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{
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const char *fp = symtab_to_fullname (s);
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if (fp != NULL && FILENAME_CMP (full_path, fp) == 0)
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{
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return s;
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}
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}
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if (real_path != NULL)
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{
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char *fullname = symtab_to_fullname (s);
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if (fullname != NULL)
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{
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char *rp = gdb_realpath (fullname);
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make_cleanup (xfree, rp);
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if (FILENAME_CMP (real_path, rp) == 0)
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{
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return s;
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}
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}
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}
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}
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/* Now, search for a matching tail (only if name doesn't have any dirs) */
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if (lbasename (name) == name)
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ALL_SYMTABS (objfile, s)
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{
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if (FILENAME_CMP (lbasename (s->filename), name) == 0)
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return s;
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}
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/* Same search rules as above apply here, but now we look thru the
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psymtabs. */
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ps = lookup_partial_symtab (name);
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if (!ps)
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return (NULL);
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if (ps->readin)
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error (_("Internal: readin %s pst for `%s' found when no symtab found."),
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ps->filename, name);
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s = PSYMTAB_TO_SYMTAB (ps);
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if (s)
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return s;
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/* At this point, we have located the psymtab for this file, but
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the conversion to a symtab has failed. This usually happens
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when we are looking up an include file. In this case,
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PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
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been created. So, we need to run through the symtabs again in
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order to find the file.
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XXX - This is a crock, and should be fixed inside of the the
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symbol parsing routines. */
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goto got_symtab;
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}
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/* Lookup the partial symbol table of a source file named NAME.
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*If* there is no '/' in the name, a match after a '/'
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in the psymtab filename will also work. */
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struct partial_symtab *
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lookup_partial_symtab (const char *name)
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{
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struct partial_symtab *pst;
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struct objfile *objfile;
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char *full_path = NULL;
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char *real_path = NULL;
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/* Here we are interested in canonicalizing an absolute path, not
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absolutizing a relative path. */
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if (IS_ABSOLUTE_PATH (name))
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{
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full_path = xfullpath (name);
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make_cleanup (xfree, full_path);
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real_path = gdb_realpath (name);
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make_cleanup (xfree, real_path);
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}
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ALL_PSYMTABS (objfile, pst)
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{
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if (FILENAME_CMP (name, pst->filename) == 0)
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{
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return (pst);
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}
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/* If the user gave us an absolute path, try to find the file in
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this symtab and use its absolute path. */
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if (full_path != NULL)
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{
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psymtab_to_fullname (pst);
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if (pst->fullname != NULL
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&& FILENAME_CMP (full_path, pst->fullname) == 0)
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{
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return pst;
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}
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}
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if (real_path != NULL)
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{
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char *rp = NULL;
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psymtab_to_fullname (pst);
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if (pst->fullname != NULL)
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{
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rp = gdb_realpath (pst->fullname);
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make_cleanup (xfree, rp);
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}
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if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
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{
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return pst;
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}
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}
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}
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/* Now, search for a matching tail (only if name doesn't have any dirs) */
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if (lbasename (name) == name)
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ALL_PSYMTABS (objfile, pst)
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{
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if (FILENAME_CMP (lbasename (pst->filename), name) == 0)
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return (pst);
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}
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return (NULL);
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}
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/* Mangle a GDB method stub type. This actually reassembles the pieces of the
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full method name, which consist of the class name (from T), the unadorned
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method name from METHOD_ID, and the signature for the specific overload,
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specified by SIGNATURE_ID. Note that this function is g++ specific. */
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char *
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gdb_mangle_name (struct type *type, int method_id, int signature_id)
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{
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int mangled_name_len;
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char *mangled_name;
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struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
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struct fn_field *method = &f[signature_id];
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char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
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char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
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char *newname = type_name_no_tag (type);
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/* Does the form of physname indicate that it is the full mangled name
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of a constructor (not just the args)? */
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int is_full_physname_constructor;
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int is_constructor;
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int is_destructor = is_destructor_name (physname);
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/* Need a new type prefix. */
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char *const_prefix = method->is_const ? "C" : "";
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char *volatile_prefix = method->is_volatile ? "V" : "";
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char buf[20];
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int len = (newname == NULL ? 0 : strlen (newname));
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/* Nothing to do if physname already contains a fully mangled v3 abi name
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or an operator name. */
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if ((physname[0] == '_' && physname[1] == 'Z')
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|| is_operator_name (field_name))
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return xstrdup (physname);
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is_full_physname_constructor = is_constructor_name (physname);
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is_constructor =
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is_full_physname_constructor || (newname && strcmp (field_name, newname) == 0);
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if (!is_destructor)
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is_destructor = (strncmp (physname, "__dt", 4) == 0);
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if (is_destructor || is_full_physname_constructor)
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{
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mangled_name = (char *) xmalloc (strlen (physname) + 1);
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strcpy (mangled_name, physname);
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return mangled_name;
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}
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if (len == 0)
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{
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sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
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}
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else if (physname[0] == 't' || physname[0] == 'Q')
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{
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/* The physname for template and qualified methods already includes
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the class name. */
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sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
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newname = NULL;
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len = 0;
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}
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else
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{
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sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
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}
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mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
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+ strlen (buf) + len + strlen (physname) + 1);
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{
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mangled_name = (char *) xmalloc (mangled_name_len);
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if (is_constructor)
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mangled_name[0] = '\0';
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else
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strcpy (mangled_name, field_name);
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}
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strcat (mangled_name, buf);
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/* If the class doesn't have a name, i.e. newname NULL, then we just
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mangle it using 0 for the length of the class. Thus it gets mangled
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as something starting with `::' rather than `classname::'. */
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if (newname != NULL)
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strcat (mangled_name, newname);
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strcat (mangled_name, physname);
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return (mangled_name);
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}
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/* Initialize the language dependent portion of a symbol
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depending upon the language for the symbol. */
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void
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symbol_init_language_specific (struct general_symbol_info *gsymbol,
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enum language language)
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{
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gsymbol->language = language;
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if (gsymbol->language == language_cplus
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|| gsymbol->language == language_java
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|| gsymbol->language == language_objc)
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{
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gsymbol->language_specific.cplus_specific.demangled_name = NULL;
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}
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else
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{
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memset (&gsymbol->language_specific, 0,
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sizeof (gsymbol->language_specific));
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}
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}
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/* Functions to initialize a symbol's mangled name. */
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/* Create the hash table used for demangled names. Each hash entry is
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a pair of strings; one for the mangled name and one for the demangled
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name. The entry is hashed via just the mangled name. */
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static void
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create_demangled_names_hash (struct objfile *objfile)
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{
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||
/* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
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The hash table code will round this up to the next prime number.
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||
Choosing a much larger table size wastes memory, and saves only about
|
||
1% in symbol reading. */
|
||
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objfile->demangled_names_hash = htab_create_alloc
|
||
(256, htab_hash_string, (int (*) (const void *, const void *)) streq,
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NULL, xcalloc, xfree);
|
||
}
|
||
|
||
/* Try to determine the demangled name for a symbol, based on the
|
||
language of that symbol. If the language is set to language_auto,
|
||
it will attempt to find any demangling algorithm that works and
|
||
then set the language appropriately. The returned name is allocated
|
||
by the demangler and should be xfree'd. */
|
||
|
||
static char *
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||
symbol_find_demangled_name (struct general_symbol_info *gsymbol,
|
||
const char *mangled)
|
||
{
|
||
char *demangled = NULL;
|
||
|
||
if (gsymbol->language == language_unknown)
|
||
gsymbol->language = language_auto;
|
||
|
||
if (gsymbol->language == language_objc
|
||
|| gsymbol->language == language_auto)
|
||
{
|
||
demangled =
|
||
objc_demangle (mangled, 0);
|
||
if (demangled != NULL)
|
||
{
|
||
gsymbol->language = language_objc;
|
||
return demangled;
|
||
}
|
||
}
|
||
if (gsymbol->language == language_cplus
|
||
|| gsymbol->language == language_auto)
|
||
{
|
||
demangled =
|
||
cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
|
||
if (demangled != NULL)
|
||
{
|
||
gsymbol->language = language_cplus;
|
||
return demangled;
|
||
}
|
||
}
|
||
if (gsymbol->language == language_java)
|
||
{
|
||
demangled =
|
||
cplus_demangle (mangled,
|
||
DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
|
||
if (demangled != NULL)
|
||
{
|
||
gsymbol->language = language_java;
|
||
return demangled;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Set both the mangled and demangled (if any) names for GSYMBOL based
|
||
on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
|
||
is used, and the memory comes from that objfile's objfile_obstack.
|
||
LINKAGE_NAME is copied, so the pointer can be discarded after
|
||
calling this function. */
|
||
|
||
/* We have to be careful when dealing with Java names: when we run
|
||
into a Java minimal symbol, we don't know it's a Java symbol, so it
|
||
gets demangled as a C++ name. This is unfortunate, but there's not
|
||
much we can do about it: but when demangling partial symbols and
|
||
regular symbols, we'd better not reuse the wrong demangled name.
|
||
(See PR gdb/1039.) We solve this by putting a distinctive prefix
|
||
on Java names when storing them in the hash table. */
|
||
|
||
/* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
|
||
don't mind the Java prefix so much: different languages have
|
||
different demangling requirements, so it's only natural that we
|
||
need to keep language data around in our demangling cache. But
|
||
it's not good that the minimal symbol has the wrong demangled name.
|
||
Unfortunately, I can't think of any easy solution to that
|
||
problem. */
|
||
|
||
#define JAVA_PREFIX "##JAVA$$"
|
||
#define JAVA_PREFIX_LEN 8
|
||
|
||
void
|
||
symbol_set_names (struct general_symbol_info *gsymbol,
|
||
const char *linkage_name, int len, struct objfile *objfile)
|
||
{
|
||
char **slot;
|
||
/* A 0-terminated copy of the linkage name. */
|
||
const char *linkage_name_copy;
|
||
/* A copy of the linkage name that might have a special Java prefix
|
||
added to it, for use when looking names up in the hash table. */
|
||
const char *lookup_name;
|
||
/* The length of lookup_name. */
|
||
int lookup_len;
|
||
|
||
if (objfile->demangled_names_hash == NULL)
|
||
create_demangled_names_hash (objfile);
|
||
|
||
if (gsymbol->language == language_ada)
|
||
{
|
||
/* In Ada, we do the symbol lookups using the mangled name, so
|
||
we can save some space by not storing the demangled name.
|
||
|
||
As a side note, we have also observed some overlap between
|
||
the C++ mangling and Ada mangling, similarly to what has
|
||
been observed with Java. Because we don't store the demangled
|
||
name with the symbol, we don't need to use the same trick
|
||
as Java. */
|
||
gsymbol->name = obstack_alloc (&objfile->objfile_obstack, len + 1);
|
||
memcpy (gsymbol->name, linkage_name, len);
|
||
gsymbol->name[len] = '\0';
|
||
gsymbol->language_specific.cplus_specific.demangled_name = NULL;
|
||
|
||
return;
|
||
}
|
||
|
||
/* The stabs reader generally provides names that are not
|
||
NUL-terminated; most of the other readers don't do this, so we
|
||
can just use the given copy, unless we're in the Java case. */
|
||
if (gsymbol->language == language_java)
|
||
{
|
||
char *alloc_name;
|
||
lookup_len = len + JAVA_PREFIX_LEN;
|
||
|
||
alloc_name = alloca (lookup_len + 1);
|
||
memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
|
||
memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
|
||
alloc_name[lookup_len] = '\0';
|
||
|
||
lookup_name = alloc_name;
|
||
linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
|
||
}
|
||
else if (linkage_name[len] != '\0')
|
||
{
|
||
char *alloc_name;
|
||
lookup_len = len;
|
||
|
||
alloc_name = alloca (lookup_len + 1);
|
||
memcpy (alloc_name, linkage_name, len);
|
||
alloc_name[lookup_len] = '\0';
|
||
|
||
lookup_name = alloc_name;
|
||
linkage_name_copy = alloc_name;
|
||
}
|
||
else
|
||
{
|
||
lookup_len = len;
|
||
lookup_name = linkage_name;
|
||
linkage_name_copy = linkage_name;
|
||
}
|
||
|
||
slot = (char **) htab_find_slot (objfile->demangled_names_hash,
|
||
lookup_name, INSERT);
|
||
|
||
/* If this name is not in the hash table, add it. */
|
||
if (*slot == NULL)
|
||
{
|
||
char *demangled_name = symbol_find_demangled_name (gsymbol,
|
||
linkage_name_copy);
|
||
int demangled_len = demangled_name ? strlen (demangled_name) : 0;
|
||
|
||
/* If there is a demangled name, place it right after the mangled name.
|
||
Otherwise, just place a second zero byte after the end of the mangled
|
||
name. */
|
||
*slot = obstack_alloc (&objfile->objfile_obstack,
|
||
lookup_len + demangled_len + 2);
|
||
memcpy (*slot, lookup_name, lookup_len + 1);
|
||
if (demangled_name != NULL)
|
||
{
|
||
memcpy (*slot + lookup_len + 1, demangled_name, demangled_len + 1);
|
||
xfree (demangled_name);
|
||
}
|
||
else
|
||
(*slot)[lookup_len + 1] = '\0';
|
||
}
|
||
|
||
gsymbol->name = *slot + lookup_len - len;
|
||
if ((*slot)[lookup_len + 1] != '\0')
|
||
gsymbol->language_specific.cplus_specific.demangled_name
|
||
= &(*slot)[lookup_len + 1];
|
||
else
|
||
gsymbol->language_specific.cplus_specific.demangled_name = NULL;
|
||
}
|
||
|
||
/* Return the source code name of a symbol. In languages where
|
||
demangling is necessary, this is the demangled name. */
|
||
|
||
char *
|
||
symbol_natural_name (const struct general_symbol_info *gsymbol)
|
||
{
|
||
switch (gsymbol->language)
|
||
{
|
||
case language_cplus:
|
||
case language_java:
|
||
case language_objc:
|
||
if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
|
||
return gsymbol->language_specific.cplus_specific.demangled_name;
|
||
break;
|
||
case language_ada:
|
||
if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
|
||
return gsymbol->language_specific.cplus_specific.demangled_name;
|
||
else
|
||
return ada_decode_symbol (gsymbol);
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
return gsymbol->name;
|
||
}
|
||
|
||
/* Return the demangled name for a symbol based on the language for
|
||
that symbol. If no demangled name exists, return NULL. */
|
||
char *
|
||
symbol_demangled_name (const struct general_symbol_info *gsymbol)
|
||
{
|
||
switch (gsymbol->language)
|
||
{
|
||
case language_cplus:
|
||
case language_java:
|
||
case language_objc:
|
||
if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
|
||
return gsymbol->language_specific.cplus_specific.demangled_name;
|
||
break;
|
||
case language_ada:
|
||
if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
|
||
return gsymbol->language_specific.cplus_specific.demangled_name;
|
||
else
|
||
return ada_decode_symbol (gsymbol);
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Return the search name of a symbol---generally the demangled or
|
||
linkage name of the symbol, depending on how it will be searched for.
|
||
If there is no distinct demangled name, then returns the same value
|
||
(same pointer) as SYMBOL_LINKAGE_NAME. */
|
||
char *
|
||
symbol_search_name (const struct general_symbol_info *gsymbol)
|
||
{
|
||
if (gsymbol->language == language_ada)
|
||
return gsymbol->name;
|
||
else
|
||
return symbol_natural_name (gsymbol);
|
||
}
|
||
|
||
/* Initialize the structure fields to zero values. */
|
||
void
|
||
init_sal (struct symtab_and_line *sal)
|
||
{
|
||
sal->symtab = 0;
|
||
sal->section = 0;
|
||
sal->line = 0;
|
||
sal->pc = 0;
|
||
sal->end = 0;
|
||
sal->explicit_pc = 0;
|
||
sal->explicit_line = 0;
|
||
}
|
||
|
||
|
||
/* Return 1 if the two sections are the same, or if they could
|
||
plausibly be copies of each other, one in an original object
|
||
file and another in a separated debug file. */
|
||
|
||
int
|
||
matching_obj_sections (struct obj_section *obj_first,
|
||
struct obj_section *obj_second)
|
||
{
|
||
asection *first = obj_first? obj_first->the_bfd_section : NULL;
|
||
asection *second = obj_second? obj_second->the_bfd_section : NULL;
|
||
struct objfile *obj;
|
||
|
||
/* If they're the same section, then they match. */
|
||
if (first == second)
|
||
return 1;
|
||
|
||
/* If either is NULL, give up. */
|
||
if (first == NULL || second == NULL)
|
||
return 0;
|
||
|
||
/* This doesn't apply to absolute symbols. */
|
||
if (first->owner == NULL || second->owner == NULL)
|
||
return 0;
|
||
|
||
/* If they're in the same object file, they must be different sections. */
|
||
if (first->owner == second->owner)
|
||
return 0;
|
||
|
||
/* Check whether the two sections are potentially corresponding. They must
|
||
have the same size, address, and name. We can't compare section indexes,
|
||
which would be more reliable, because some sections may have been
|
||
stripped. */
|
||
if (bfd_get_section_size (first) != bfd_get_section_size (second))
|
||
return 0;
|
||
|
||
/* In-memory addresses may start at a different offset, relativize them. */
|
||
if (bfd_get_section_vma (first->owner, first)
|
||
- bfd_get_start_address (first->owner)
|
||
!= bfd_get_section_vma (second->owner, second)
|
||
- bfd_get_start_address (second->owner))
|
||
return 0;
|
||
|
||
if (bfd_get_section_name (first->owner, first) == NULL
|
||
|| bfd_get_section_name (second->owner, second) == NULL
|
||
|| strcmp (bfd_get_section_name (first->owner, first),
|
||
bfd_get_section_name (second->owner, second)) != 0)
|
||
return 0;
|
||
|
||
/* Otherwise check that they are in corresponding objfiles. */
|
||
|
||
ALL_OBJFILES (obj)
|
||
if (obj->obfd == first->owner)
|
||
break;
|
||
gdb_assert (obj != NULL);
|
||
|
||
if (obj->separate_debug_objfile != NULL
|
||
&& obj->separate_debug_objfile->obfd == second->owner)
|
||
return 1;
|
||
if (obj->separate_debug_objfile_backlink != NULL
|
||
&& obj->separate_debug_objfile_backlink->obfd == second->owner)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Find which partial symtab contains PC and SECTION starting at psymtab PST.
|
||
We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */
|
||
|
||
static struct partial_symtab *
|
||
find_pc_sect_psymtab_closer (CORE_ADDR pc, struct obj_section *section,
|
||
struct partial_symtab *pst,
|
||
struct minimal_symbol *msymbol)
|
||
{
|
||
struct objfile *objfile = pst->objfile;
|
||
struct partial_symtab *tpst;
|
||
struct partial_symtab *best_pst = pst;
|
||
CORE_ADDR best_addr = pst->textlow;
|
||
|
||
/* An objfile that has its functions reordered might have
|
||
many partial symbol tables containing the PC, but
|
||
we want the partial symbol table that contains the
|
||
function containing the PC. */
|
||
if (!(objfile->flags & OBJF_REORDERED) &&
|
||
section == 0) /* can't validate section this way */
|
||
return pst;
|
||
|
||
if (msymbol == NULL)
|
||
return (pst);
|
||
|
||
/* The code range of partial symtabs sometimes overlap, so, in
|
||
the loop below, we need to check all partial symtabs and
|
||
find the one that fits better for the given PC address. We
|
||
select the partial symtab that contains a symbol whose
|
||
address is closest to the PC address. By closest we mean
|
||
that find_pc_sect_symbol returns the symbol with address
|
||
that is closest and still less than the given PC. */
|
||
for (tpst = pst; tpst != NULL; tpst = tpst->next)
|
||
{
|
||
if (pc >= tpst->textlow && pc < tpst->texthigh)
|
||
{
|
||
struct partial_symbol *p;
|
||
CORE_ADDR this_addr;
|
||
|
||
/* NOTE: This assumes that every psymbol has a
|
||
corresponding msymbol, which is not necessarily
|
||
true; the debug info might be much richer than the
|
||
object's symbol table. */
|
||
p = find_pc_sect_psymbol (tpst, pc, section);
|
||
if (p != NULL
|
||
&& SYMBOL_VALUE_ADDRESS (p)
|
||
== SYMBOL_VALUE_ADDRESS (msymbol))
|
||
return tpst;
|
||
|
||
/* Also accept the textlow value of a psymtab as a
|
||
"symbol", to provide some support for partial
|
||
symbol tables with line information but no debug
|
||
symbols (e.g. those produced by an assembler). */
|
||
if (p != NULL)
|
||
this_addr = SYMBOL_VALUE_ADDRESS (p);
|
||
else
|
||
this_addr = tpst->textlow;
|
||
|
||
/* Check whether it is closer than our current
|
||
BEST_ADDR. Since this symbol address is
|
||
necessarily lower or equal to PC, the symbol closer
|
||
to PC is the symbol which address is the highest.
|
||
This way we return the psymtab which contains such
|
||
best match symbol. This can help in cases where the
|
||
symbol information/debuginfo is not complete, like
|
||
for instance on IRIX6 with gcc, where no debug info
|
||
is emitted for statics. (See also the nodebug.exp
|
||
testcase.) */
|
||
if (this_addr > best_addr)
|
||
{
|
||
best_addr = this_addr;
|
||
best_pst = tpst;
|
||
}
|
||
}
|
||
}
|
||
return best_pst;
|
||
}
|
||
|
||
/* Find which partial symtab contains PC and SECTION. Return 0 if
|
||
none. We return the psymtab that contains a symbol whose address
|
||
exactly matches PC, or, if we cannot find an exact match, the
|
||
psymtab that contains a symbol whose address is closest to PC. */
|
||
struct partial_symtab *
|
||
find_pc_sect_psymtab (CORE_ADDR pc, struct obj_section *section)
|
||
{
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
|
||
/* If we know that this is not a text address, return failure. This is
|
||
necessary because we loop based on texthigh and textlow, which do
|
||
not include the data ranges. */
|
||
msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
|
||
if (msymbol
|
||
&& (MSYMBOL_TYPE (msymbol) == mst_data
|
||
|| MSYMBOL_TYPE (msymbol) == mst_bss
|
||
|| MSYMBOL_TYPE (msymbol) == mst_abs
|
||
|| MSYMBOL_TYPE (msymbol) == mst_file_data
|
||
|| MSYMBOL_TYPE (msymbol) == mst_file_bss))
|
||
return NULL;
|
||
|
||
/* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
|
||
than the later used TEXTLOW/TEXTHIGH one. */
|
||
|
||
ALL_OBJFILES (objfile)
|
||
if (objfile->psymtabs_addrmap != NULL)
|
||
{
|
||
struct partial_symtab *pst;
|
||
|
||
pst = addrmap_find (objfile->psymtabs_addrmap, pc);
|
||
if (pst != NULL)
|
||
{
|
||
/* FIXME: addrmaps currently do not handle overlayed sections,
|
||
so fall back to the non-addrmap case if we're debugging
|
||
overlays and the addrmap returned the wrong section. */
|
||
if (overlay_debugging && msymbol && section)
|
||
{
|
||
struct partial_symbol *p;
|
||
/* NOTE: This assumes that every psymbol has a
|
||
corresponding msymbol, which is not necessarily
|
||
true; the debug info might be much richer than the
|
||
object's symbol table. */
|
||
p = find_pc_sect_psymbol (pst, pc, section);
|
||
if (!p
|
||
|| SYMBOL_VALUE_ADDRESS (p)
|
||
!= SYMBOL_VALUE_ADDRESS (msymbol))
|
||
continue;
|
||
}
|
||
|
||
/* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as
|
||
PSYMTABS_ADDRMAP we used has already the best 1-byte
|
||
granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into
|
||
a worse chosen section due to the TEXTLOW/TEXTHIGH ranges
|
||
overlap. */
|
||
|
||
return pst;
|
||
}
|
||
}
|
||
|
||
/* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
|
||
which still have no corresponding full SYMTABs read. But it is not
|
||
present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB
|
||
so far. */
|
||
|
||
ALL_OBJFILES (objfile)
|
||
{
|
||
struct partial_symtab *pst;
|
||
|
||
/* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of
|
||
its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying
|
||
debug info type in single OBJFILE. */
|
||
|
||
ALL_OBJFILE_PSYMTABS (objfile, pst)
|
||
if (pc >= pst->textlow && pc < pst->texthigh)
|
||
{
|
||
struct partial_symtab *best_pst;
|
||
|
||
best_pst = find_pc_sect_psymtab_closer (pc, section, pst,
|
||
msymbol);
|
||
if (best_pst != NULL)
|
||
return best_pst;
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Find which partial symtab contains PC. Return 0 if none.
|
||
Backward compatibility, no section */
|
||
|
||
struct partial_symtab *
|
||
find_pc_psymtab (CORE_ADDR pc)
|
||
{
|
||
return find_pc_sect_psymtab (pc, find_pc_mapped_section (pc));
|
||
}
|
||
|
||
/* Find which partial symbol within a psymtab matches PC and SECTION.
|
||
Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
|
||
|
||
struct partial_symbol *
|
||
find_pc_sect_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc,
|
||
struct obj_section *section)
|
||
{
|
||
struct partial_symbol *best = NULL, *p, **pp;
|
||
CORE_ADDR best_pc;
|
||
|
||
if (!psymtab)
|
||
psymtab = find_pc_sect_psymtab (pc, section);
|
||
if (!psymtab)
|
||
return 0;
|
||
|
||
/* Cope with programs that start at address 0 */
|
||
best_pc = (psymtab->textlow != 0) ? psymtab->textlow - 1 : 0;
|
||
|
||
/* Search the global symbols as well as the static symbols, so that
|
||
find_pc_partial_function doesn't use a minimal symbol and thus
|
||
cache a bad endaddr. */
|
||
for (pp = psymtab->objfile->global_psymbols.list + psymtab->globals_offset;
|
||
(pp - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset)
|
||
< psymtab->n_global_syms);
|
||
pp++)
|
||
{
|
||
p = *pp;
|
||
if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
|
||
&& SYMBOL_CLASS (p) == LOC_BLOCK
|
||
&& pc >= SYMBOL_VALUE_ADDRESS (p)
|
||
&& (SYMBOL_VALUE_ADDRESS (p) > best_pc
|
||
|| (psymtab->textlow == 0
|
||
&& best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
|
||
{
|
||
if (section) /* match on a specific section */
|
||
{
|
||
fixup_psymbol_section (p, psymtab->objfile);
|
||
if (!matching_obj_sections (SYMBOL_OBJ_SECTION (p), section))
|
||
continue;
|
||
}
|
||
best_pc = SYMBOL_VALUE_ADDRESS (p);
|
||
best = p;
|
||
}
|
||
}
|
||
|
||
for (pp = psymtab->objfile->static_psymbols.list + psymtab->statics_offset;
|
||
(pp - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset)
|
||
< psymtab->n_static_syms);
|
||
pp++)
|
||
{
|
||
p = *pp;
|
||
if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
|
||
&& SYMBOL_CLASS (p) == LOC_BLOCK
|
||
&& pc >= SYMBOL_VALUE_ADDRESS (p)
|
||
&& (SYMBOL_VALUE_ADDRESS (p) > best_pc
|
||
|| (psymtab->textlow == 0
|
||
&& best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
|
||
{
|
||
if (section) /* match on a specific section */
|
||
{
|
||
fixup_psymbol_section (p, psymtab->objfile);
|
||
if (!matching_obj_sections (SYMBOL_OBJ_SECTION (p), section))
|
||
continue;
|
||
}
|
||
best_pc = SYMBOL_VALUE_ADDRESS (p);
|
||
best = p;
|
||
}
|
||
}
|
||
|
||
return best;
|
||
}
|
||
|
||
/* Find which partial symbol within a psymtab matches PC. Return 0 if none.
|
||
Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
|
||
|
||
struct partial_symbol *
|
||
find_pc_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc)
|
||
{
|
||
return find_pc_sect_psymbol (psymtab, pc, find_pc_mapped_section (pc));
|
||
}
|
||
|
||
/* Debug symbols usually don't have section information. We need to dig that
|
||
out of the minimal symbols and stash that in the debug symbol. */
|
||
|
||
static void
|
||
fixup_section (struct general_symbol_info *ginfo,
|
||
CORE_ADDR addr, struct objfile *objfile)
|
||
{
|
||
struct minimal_symbol *msym;
|
||
|
||
/* First, check whether a minimal symbol with the same name exists
|
||
and points to the same address. The address check is required
|
||
e.g. on PowerPC64, where the minimal symbol for a function will
|
||
point to the function descriptor, while the debug symbol will
|
||
point to the actual function code. */
|
||
msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
|
||
if (msym)
|
||
{
|
||
ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
|
||
ginfo->section = SYMBOL_SECTION (msym);
|
||
}
|
||
else
|
||
{
|
||
/* Static, function-local variables do appear in the linker
|
||
(minimal) symbols, but are frequently given names that won't
|
||
be found via lookup_minimal_symbol(). E.g., it has been
|
||
observed in frv-uclinux (ELF) executables that a static,
|
||
function-local variable named "foo" might appear in the
|
||
linker symbols as "foo.6" or "foo.3". Thus, there is no
|
||
point in attempting to extend the lookup-by-name mechanism to
|
||
handle this case due to the fact that there can be multiple
|
||
names.
|
||
|
||
So, instead, search the section table when lookup by name has
|
||
failed. The ``addr'' and ``endaddr'' fields may have already
|
||
been relocated. If so, the relocation offset (i.e. the
|
||
ANOFFSET value) needs to be subtracted from these values when
|
||
performing the comparison. We unconditionally subtract it,
|
||
because, when no relocation has been performed, the ANOFFSET
|
||
value will simply be zero.
|
||
|
||
The address of the symbol whose section we're fixing up HAS
|
||
NOT BEEN adjusted (relocated) yet. It can't have been since
|
||
the section isn't yet known and knowing the section is
|
||
necessary in order to add the correct relocation value. In
|
||
other words, we wouldn't even be in this function (attempting
|
||
to compute the section) if it were already known.
|
||
|
||
Note that it is possible to search the minimal symbols
|
||
(subtracting the relocation value if necessary) to find the
|
||
matching minimal symbol, but this is overkill and much less
|
||
efficient. It is not necessary to find the matching minimal
|
||
symbol, only its section.
|
||
|
||
Note that this technique (of doing a section table search)
|
||
can fail when unrelocated section addresses overlap. For
|
||
this reason, we still attempt a lookup by name prior to doing
|
||
a search of the section table. */
|
||
|
||
struct obj_section *s;
|
||
ALL_OBJFILE_OSECTIONS (objfile, s)
|
||
{
|
||
int idx = s->the_bfd_section->index;
|
||
CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
|
||
|
||
if (obj_section_addr (s) - offset <= addr
|
||
&& addr < obj_section_endaddr (s) - offset)
|
||
{
|
||
ginfo->obj_section = s;
|
||
ginfo->section = idx;
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
struct symbol *
|
||
fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
if (!sym)
|
||
return NULL;
|
||
|
||
if (SYMBOL_OBJ_SECTION (sym))
|
||
return sym;
|
||
|
||
/* We either have an OBJFILE, or we can get at it from the sym's
|
||
symtab. Anything else is a bug. */
|
||
gdb_assert (objfile || SYMBOL_SYMTAB (sym));
|
||
|
||
if (objfile == NULL)
|
||
objfile = SYMBOL_SYMTAB (sym)->objfile;
|
||
|
||
/* We should have an objfile by now. */
|
||
gdb_assert (objfile);
|
||
|
||
switch (SYMBOL_CLASS (sym))
|
||
{
|
||
case LOC_STATIC:
|
||
case LOC_LABEL:
|
||
addr = SYMBOL_VALUE_ADDRESS (sym);
|
||
break;
|
||
case LOC_BLOCK:
|
||
addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
|
||
break;
|
||
|
||
default:
|
||
/* Nothing else will be listed in the minsyms -- no use looking
|
||
it up. */
|
||
return sym;
|
||
}
|
||
|
||
fixup_section (&sym->ginfo, addr, objfile);
|
||
|
||
return sym;
|
||
}
|
||
|
||
struct partial_symbol *
|
||
fixup_psymbol_section (struct partial_symbol *psym, struct objfile *objfile)
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
if (!psym)
|
||
return NULL;
|
||
|
||
if (SYMBOL_OBJ_SECTION (psym))
|
||
return psym;
|
||
|
||
gdb_assert (objfile);
|
||
|
||
switch (SYMBOL_CLASS (psym))
|
||
{
|
||
case LOC_STATIC:
|
||
case LOC_LABEL:
|
||
case LOC_BLOCK:
|
||
addr = SYMBOL_VALUE_ADDRESS (psym);
|
||
break;
|
||
default:
|
||
/* Nothing else will be listed in the minsyms -- no use looking
|
||
it up. */
|
||
return psym;
|
||
}
|
||
|
||
fixup_section (&psym->ginfo, addr, objfile);
|
||
|
||
return psym;
|
||
}
|
||
|
||
/* Find the definition for a specified symbol name NAME
|
||
in domain DOMAIN, visible from lexical block BLOCK.
|
||
Returns the struct symbol pointer, or zero if no symbol is found.
|
||
C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
|
||
NAME is a field of the current implied argument `this'. If so set
|
||
*IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
|
||
BLOCK_FOUND is set to the block in which NAME is found (in the case of
|
||
a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
|
||
|
||
/* This function has a bunch of loops in it and it would seem to be
|
||
attractive to put in some QUIT's (though I'm not really sure
|
||
whether it can run long enough to be really important). But there
|
||
are a few calls for which it would appear to be bad news to quit
|
||
out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
|
||
that there is C++ code below which can error(), but that probably
|
||
doesn't affect these calls since they are looking for a known
|
||
variable and thus can probably assume it will never hit the C++
|
||
code). */
|
||
|
||
struct symbol *
|
||
lookup_symbol_in_language (const char *name, const struct block *block,
|
||
const domain_enum domain, enum language lang,
|
||
int *is_a_field_of_this)
|
||
{
|
||
char *demangled_name = NULL;
|
||
const char *modified_name = NULL;
|
||
const char *mangled_name = NULL;
|
||
struct symbol *returnval;
|
||
struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
|
||
|
||
modified_name = name;
|
||
|
||
/* If we are using C++ or Java, demangle the name before doing a lookup, so
|
||
we can always binary search. */
|
||
if (lang == language_cplus)
|
||
{
|
||
demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
|
||
if (demangled_name)
|
||
{
|
||
mangled_name = name;
|
||
modified_name = demangled_name;
|
||
make_cleanup (xfree, demangled_name);
|
||
}
|
||
else
|
||
{
|
||
/* If we were given a non-mangled name, canonicalize it
|
||
according to the language (so far only for C++). */
|
||
demangled_name = cp_canonicalize_string (name);
|
||
if (demangled_name)
|
||
{
|
||
modified_name = demangled_name;
|
||
make_cleanup (xfree, demangled_name);
|
||
}
|
||
}
|
||
}
|
||
else if (lang == language_java)
|
||
{
|
||
demangled_name = cplus_demangle (name,
|
||
DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
|
||
if (demangled_name)
|
||
{
|
||
mangled_name = name;
|
||
modified_name = demangled_name;
|
||
make_cleanup (xfree, demangled_name);
|
||
}
|
||
}
|
||
|
||
if (case_sensitivity == case_sensitive_off)
|
||
{
|
||
char *copy;
|
||
int len, i;
|
||
|
||
len = strlen (name);
|
||
copy = (char *) alloca (len + 1);
|
||
for (i= 0; i < len; i++)
|
||
copy[i] = tolower (name[i]);
|
||
copy[len] = 0;
|
||
modified_name = copy;
|
||
}
|
||
|
||
returnval = lookup_symbol_aux (modified_name, mangled_name, block,
|
||
domain, lang, is_a_field_of_this);
|
||
do_cleanups (cleanup);
|
||
|
||
return returnval;
|
||
}
|
||
|
||
/* Behave like lookup_symbol_in_language, but performed with the
|
||
current language. */
|
||
|
||
struct symbol *
|
||
lookup_symbol (const char *name, const struct block *block,
|
||
domain_enum domain, int *is_a_field_of_this)
|
||
{
|
||
return lookup_symbol_in_language (name, block, domain,
|
||
current_language->la_language,
|
||
is_a_field_of_this);
|
||
}
|
||
|
||
/* Behave like lookup_symbol except that NAME is the natural name
|
||
of the symbol that we're looking for and, if LINKAGE_NAME is
|
||
non-NULL, ensure that the symbol's linkage name matches as
|
||
well. */
|
||
|
||
static struct symbol *
|
||
lookup_symbol_aux (const char *name, const char *linkage_name,
|
||
const struct block *block, const domain_enum domain,
|
||
enum language language, int *is_a_field_of_this)
|
||
{
|
||
struct symbol *sym;
|
||
const struct language_defn *langdef;
|
||
|
||
/* Make sure we do something sensible with is_a_field_of_this, since
|
||
the callers that set this parameter to some non-null value will
|
||
certainly use it later and expect it to be either 0 or 1.
|
||
If we don't set it, the contents of is_a_field_of_this are
|
||
undefined. */
|
||
if (is_a_field_of_this != NULL)
|
||
*is_a_field_of_this = 0;
|
||
|
||
/* Search specified block and its superiors. Don't search
|
||
STATIC_BLOCK or GLOBAL_BLOCK. */
|
||
|
||
sym = lookup_symbol_aux_local (name, linkage_name, block, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
/* If requested to do so by the caller and if appropriate for LANGUAGE,
|
||
check to see if NAME is a field of `this'. */
|
||
|
||
langdef = language_def (language);
|
||
|
||
if (langdef->la_name_of_this != NULL && is_a_field_of_this != NULL
|
||
&& block != NULL)
|
||
{
|
||
struct symbol *sym = NULL;
|
||
/* 'this' is only defined in the function's block, so find the
|
||
enclosing function block. */
|
||
for (; block && !BLOCK_FUNCTION (block);
|
||
block = BLOCK_SUPERBLOCK (block));
|
||
|
||
if (block && !dict_empty (BLOCK_DICT (block)))
|
||
sym = lookup_block_symbol (block, langdef->la_name_of_this,
|
||
NULL, VAR_DOMAIN);
|
||
if (sym)
|
||
{
|
||
struct type *t = sym->type;
|
||
|
||
/* I'm not really sure that type of this can ever
|
||
be typedefed; just be safe. */
|
||
CHECK_TYPEDEF (t);
|
||
if (TYPE_CODE (t) == TYPE_CODE_PTR
|
||
|| TYPE_CODE (t) == TYPE_CODE_REF)
|
||
t = TYPE_TARGET_TYPE (t);
|
||
|
||
if (TYPE_CODE (t) != TYPE_CODE_STRUCT
|
||
&& TYPE_CODE (t) != TYPE_CODE_UNION)
|
||
error (_("Internal error: `%s' is not an aggregate"),
|
||
langdef->la_name_of_this);
|
||
|
||
if (check_field (t, name))
|
||
{
|
||
*is_a_field_of_this = 1;
|
||
return NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Now do whatever is appropriate for LANGUAGE to look
|
||
up static and global variables. */
|
||
|
||
sym = langdef->la_lookup_symbol_nonlocal (name, linkage_name, block, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
/* Now search all static file-level symbols. Not strictly correct,
|
||
but more useful than an error. Do the symtabs first, then check
|
||
the psymtabs. If a psymtab indicates the existence of the
|
||
desired name as a file-level static, then do psymtab-to-symtab
|
||
conversion on the fly and return the found symbol. */
|
||
|
||
sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, linkage_name, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
sym = lookup_symbol_aux_psymtabs (STATIC_BLOCK, name, linkage_name, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Check to see if the symbol is defined in BLOCK or its superiors.
|
||
Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
|
||
|
||
static struct symbol *
|
||
lookup_symbol_aux_local (const char *name, const char *linkage_name,
|
||
const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym;
|
||
const struct block *static_block = block_static_block (block);
|
||
|
||
/* Check if either no block is specified or it's a global block. */
|
||
|
||
if (static_block == NULL)
|
||
return NULL;
|
||
|
||
while (block != static_block)
|
||
{
|
||
sym = lookup_symbol_aux_block (name, linkage_name, block, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
|
||
break;
|
||
block = BLOCK_SUPERBLOCK (block);
|
||
}
|
||
|
||
/* We've reached the edge of the function without finding a result. */
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Look up OBJFILE to BLOCK. */
|
||
|
||
static struct objfile *
|
||
lookup_objfile_from_block (const struct block *block)
|
||
{
|
||
struct objfile *obj;
|
||
struct symtab *s;
|
||
|
||
if (block == NULL)
|
||
return NULL;
|
||
|
||
block = block_global_block (block);
|
||
/* Go through SYMTABS. */
|
||
ALL_SYMTABS (obj, s)
|
||
if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
|
||
return obj;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Look up a symbol in a block; if found, fixup the symbol, and set
|
||
block_found appropriately. */
|
||
|
||
struct symbol *
|
||
lookup_symbol_aux_block (const char *name, const char *linkage_name,
|
||
const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym;
|
||
|
||
sym = lookup_block_symbol (block, name, linkage_name, domain);
|
||
if (sym)
|
||
{
|
||
block_found = block;
|
||
return fixup_symbol_section (sym, NULL);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Check all global symbols in OBJFILE in symtabs and
|
||
psymtabs. */
|
||
|
||
struct symbol *
|
||
lookup_global_symbol_from_objfile (const struct objfile *objfile,
|
||
const char *name,
|
||
const char *linkage_name,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym;
|
||
struct blockvector *bv;
|
||
const struct block *block;
|
||
struct symtab *s;
|
||
struct partial_symtab *ps;
|
||
|
||
/* Go through symtabs. */
|
||
ALL_OBJFILE_SYMTABS (objfile, s)
|
||
{
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
|
||
sym = lookup_block_symbol (block, name, linkage_name, domain);
|
||
if (sym)
|
||
{
|
||
block_found = block;
|
||
return fixup_symbol_section (sym, (struct objfile *)objfile);
|
||
}
|
||
}
|
||
|
||
/* Now go through psymtabs. */
|
||
ALL_OBJFILE_PSYMTABS (objfile, ps)
|
||
{
|
||
if (!ps->readin
|
||
&& lookup_partial_symbol (ps, name, linkage_name,
|
||
1, domain))
|
||
{
|
||
s = PSYMTAB_TO_SYMTAB (ps);
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
|
||
sym = lookup_block_symbol (block, name, linkage_name, domain);
|
||
return fixup_symbol_section (sym, (struct objfile *)objfile);
|
||
}
|
||
}
|
||
|
||
if (objfile->separate_debug_objfile)
|
||
return lookup_global_symbol_from_objfile (objfile->separate_debug_objfile,
|
||
name, linkage_name, domain);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Check to see if the symbol is defined in one of the symtabs.
|
||
BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
|
||
depending on whether or not we want to search global symbols or
|
||
static symbols. */
|
||
|
||
static struct symbol *
|
||
lookup_symbol_aux_symtabs (int block_index,
|
||
const char *name, const char *linkage_name,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym;
|
||
struct objfile *objfile;
|
||
struct blockvector *bv;
|
||
const struct block *block;
|
||
struct symtab *s;
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, block_index);
|
||
sym = lookup_block_symbol (block, name, linkage_name, domain);
|
||
if (sym)
|
||
{
|
||
block_found = block;
|
||
return fixup_symbol_section (sym, objfile);
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Check to see if the symbol is defined in one of the partial
|
||
symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
|
||
STATIC_BLOCK, depending on whether or not we want to search global
|
||
symbols or static symbols. */
|
||
|
||
static struct symbol *
|
||
lookup_symbol_aux_psymtabs (int block_index, const char *name,
|
||
const char *linkage_name,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym;
|
||
struct objfile *objfile;
|
||
struct blockvector *bv;
|
||
const struct block *block;
|
||
struct partial_symtab *ps;
|
||
struct symtab *s;
|
||
const int psymtab_index = (block_index == GLOBAL_BLOCK ? 1 : 0);
|
||
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
if (!ps->readin
|
||
&& lookup_partial_symbol (ps, name, linkage_name,
|
||
psymtab_index, domain))
|
||
{
|
||
s = PSYMTAB_TO_SYMTAB (ps);
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, block_index);
|
||
sym = lookup_block_symbol (block, name, linkage_name, domain);
|
||
if (!sym)
|
||
{
|
||
/* This shouldn't be necessary, but as a last resort try
|
||
looking in the statics even though the psymtab claimed
|
||
the symbol was global, or vice-versa. It's possible
|
||
that the psymtab gets it wrong in some cases. */
|
||
|
||
/* FIXME: carlton/2002-09-30: Should we really do that?
|
||
If that happens, isn't it likely to be a GDB error, in
|
||
which case we should fix the GDB error rather than
|
||
silently dealing with it here? So I'd vote for
|
||
removing the check for the symbol in the other
|
||
block. */
|
||
block = BLOCKVECTOR_BLOCK (bv,
|
||
block_index == GLOBAL_BLOCK ?
|
||
STATIC_BLOCK : GLOBAL_BLOCK);
|
||
sym = lookup_block_symbol (block, name, linkage_name, domain);
|
||
if (!sym)
|
||
error (_("Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n%s may be an inlined function, or may be a template function\n(if a template, try specifying an instantiation: %s<type>)."),
|
||
block_index == GLOBAL_BLOCK ? "global" : "static",
|
||
name, ps->filename, name, name);
|
||
}
|
||
return fixup_symbol_section (sym, objfile);
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* A default version of lookup_symbol_nonlocal for use by languages
|
||
that can't think of anything better to do. This implements the C
|
||
lookup rules. */
|
||
|
||
struct symbol *
|
||
basic_lookup_symbol_nonlocal (const char *name,
|
||
const char *linkage_name,
|
||
const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym;
|
||
|
||
/* NOTE: carlton/2003-05-19: The comments below were written when
|
||
this (or what turned into this) was part of lookup_symbol_aux;
|
||
I'm much less worried about these questions now, since these
|
||
decisions have turned out well, but I leave these comments here
|
||
for posterity. */
|
||
|
||
/* NOTE: carlton/2002-12-05: There is a question as to whether or
|
||
not it would be appropriate to search the current global block
|
||
here as well. (That's what this code used to do before the
|
||
is_a_field_of_this check was moved up.) On the one hand, it's
|
||
redundant with the lookup_symbol_aux_symtabs search that happens
|
||
next. On the other hand, if decode_line_1 is passed an argument
|
||
like filename:var, then the user presumably wants 'var' to be
|
||
searched for in filename. On the third hand, there shouldn't be
|
||
multiple global variables all of which are named 'var', and it's
|
||
not like decode_line_1 has ever restricted its search to only
|
||
global variables in a single filename. All in all, only
|
||
searching the static block here seems best: it's correct and it's
|
||
cleanest. */
|
||
|
||
/* NOTE: carlton/2002-12-05: There's also a possible performance
|
||
issue here: if you usually search for global symbols in the
|
||
current file, then it would be slightly better to search the
|
||
current global block before searching all the symtabs. But there
|
||
are other factors that have a much greater effect on performance
|
||
than that one, so I don't think we should worry about that for
|
||
now. */
|
||
|
||
sym = lookup_symbol_static (name, linkage_name, block, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
return lookup_symbol_global (name, linkage_name, block, domain);
|
||
}
|
||
|
||
/* Lookup a symbol in the static block associated to BLOCK, if there
|
||
is one; do nothing if BLOCK is NULL or a global block. */
|
||
|
||
struct symbol *
|
||
lookup_symbol_static (const char *name,
|
||
const char *linkage_name,
|
||
const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
const struct block *static_block = block_static_block (block);
|
||
|
||
if (static_block != NULL)
|
||
return lookup_symbol_aux_block (name, linkage_name, static_block, domain);
|
||
else
|
||
return NULL;
|
||
}
|
||
|
||
/* Lookup a symbol in all files' global blocks (searching psymtabs if
|
||
necessary). */
|
||
|
||
struct symbol *
|
||
lookup_symbol_global (const char *name,
|
||
const char *linkage_name,
|
||
const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct symbol *sym = NULL;
|
||
struct objfile *objfile = NULL;
|
||
|
||
/* Call library-specific lookup procedure. */
|
||
objfile = lookup_objfile_from_block (block);
|
||
if (objfile != NULL)
|
||
sym = solib_global_lookup (objfile, name, linkage_name, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name, domain);
|
||
if (sym != NULL)
|
||
return sym;
|
||
|
||
return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name, domain);
|
||
}
|
||
|
||
int
|
||
symbol_matches_domain (enum language symbol_language,
|
||
domain_enum symbol_domain,
|
||
domain_enum domain)
|
||
{
|
||
/* For C++ "struct foo { ... }" also defines a typedef for "foo".
|
||
A Java class declaration also defines a typedef for the class.
|
||
Similarly, any Ada type declaration implicitly defines a typedef. */
|
||
if (symbol_language == language_cplus
|
||
|| symbol_language == language_java
|
||
|| symbol_language == language_ada)
|
||
{
|
||
if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
|
||
&& symbol_domain == STRUCT_DOMAIN)
|
||
return 1;
|
||
}
|
||
/* For all other languages, strict match is required. */
|
||
return (symbol_domain == domain);
|
||
}
|
||
|
||
/* Look, in partial_symtab PST, for symbol whose natural name is NAME.
|
||
If LINKAGE_NAME is non-NULL, check in addition that the symbol's
|
||
linkage name matches it. Check the global symbols if GLOBAL, the
|
||
static symbols if not */
|
||
|
||
struct partial_symbol *
|
||
lookup_partial_symbol (struct partial_symtab *pst, const char *name,
|
||
const char *linkage_name, int global,
|
||
domain_enum domain)
|
||
{
|
||
struct partial_symbol *temp;
|
||
struct partial_symbol **start, **psym;
|
||
struct partial_symbol **top, **real_top, **bottom, **center;
|
||
int length = (global ? pst->n_global_syms : pst->n_static_syms);
|
||
int do_linear_search = 1;
|
||
|
||
if (length == 0)
|
||
{
|
||
return (NULL);
|
||
}
|
||
start = (global ?
|
||
pst->objfile->global_psymbols.list + pst->globals_offset :
|
||
pst->objfile->static_psymbols.list + pst->statics_offset);
|
||
|
||
if (global) /* This means we can use a binary search. */
|
||
{
|
||
do_linear_search = 0;
|
||
|
||
/* Binary search. This search is guaranteed to end with center
|
||
pointing at the earliest partial symbol whose name might be
|
||
correct. At that point *all* partial symbols with an
|
||
appropriate name will be checked against the correct
|
||
domain. */
|
||
|
||
bottom = start;
|
||
top = start + length - 1;
|
||
real_top = top;
|
||
while (top > bottom)
|
||
{
|
||
center = bottom + (top - bottom) / 2;
|
||
if (!(center < top))
|
||
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
|
||
if (!do_linear_search
|
||
&& (SYMBOL_LANGUAGE (*center) == language_java))
|
||
{
|
||
do_linear_search = 1;
|
||
}
|
||
if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center), name) >= 0)
|
||
{
|
||
top = center;
|
||
}
|
||
else
|
||
{
|
||
bottom = center + 1;
|
||
}
|
||
}
|
||
if (!(top == bottom))
|
||
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
|
||
|
||
while (top <= real_top
|
||
&& (linkage_name != NULL
|
||
? strcmp (SYMBOL_LINKAGE_NAME (*top), linkage_name) == 0
|
||
: SYMBOL_MATCHES_SEARCH_NAME (*top,name)))
|
||
{
|
||
if (symbol_matches_domain (SYMBOL_LANGUAGE (*top),
|
||
SYMBOL_DOMAIN (*top), domain))
|
||
return (*top);
|
||
top++;
|
||
}
|
||
}
|
||
|
||
/* Can't use a binary search or else we found during the binary search that
|
||
we should also do a linear search. */
|
||
|
||
if (do_linear_search)
|
||
{
|
||
for (psym = start; psym < start + length; psym++)
|
||
{
|
||
if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym),
|
||
SYMBOL_DOMAIN (*psym), domain))
|
||
{
|
||
if (linkage_name != NULL
|
||
? strcmp (SYMBOL_LINKAGE_NAME (*psym), linkage_name) == 0
|
||
: SYMBOL_MATCHES_SEARCH_NAME (*psym, name))
|
||
{
|
||
return (*psym);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return (NULL);
|
||
}
|
||
|
||
/* Look up a type named NAME in the struct_domain. The type returned
|
||
must not be opaque -- i.e., must have at least one field
|
||
defined. */
|
||
|
||
struct type *
|
||
lookup_transparent_type (const char *name)
|
||
{
|
||
return current_language->la_lookup_transparent_type (name);
|
||
}
|
||
|
||
/* The standard implementation of lookup_transparent_type. This code
|
||
was modeled on lookup_symbol -- the parts not relevant to looking
|
||
up types were just left out. In particular it's assumed here that
|
||
types are available in struct_domain and only at file-static or
|
||
global blocks. */
|
||
|
||
struct type *
|
||
basic_lookup_transparent_type (const char *name)
|
||
{
|
||
struct symbol *sym;
|
||
struct symtab *s = NULL;
|
||
struct partial_symtab *ps;
|
||
struct blockvector *bv;
|
||
struct objfile *objfile;
|
||
struct block *block;
|
||
|
||
/* Now search all the global symbols. Do the symtab's first, then
|
||
check the psymtab's. If a psymtab indicates the existence
|
||
of the desired name as a global, then do psymtab-to-symtab
|
||
conversion on the fly and return the found symbol. */
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
|
||
sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
|
||
if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
|
||
{
|
||
return SYMBOL_TYPE (sym);
|
||
}
|
||
}
|
||
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
if (!ps->readin && lookup_partial_symbol (ps, name, NULL,
|
||
1, STRUCT_DOMAIN))
|
||
{
|
||
s = PSYMTAB_TO_SYMTAB (ps);
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
|
||
sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
|
||
if (!sym)
|
||
{
|
||
/* This shouldn't be necessary, but as a last resort
|
||
* try looking in the statics even though the psymtab
|
||
* claimed the symbol was global. It's possible that
|
||
* the psymtab gets it wrong in some cases.
|
||
*/
|
||
block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
|
||
sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
|
||
if (!sym)
|
||
error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
|
||
%s may be an inlined function, or may be a template function\n\
|
||
(if a template, try specifying an instantiation: %s<type>)."),
|
||
name, ps->filename, name, name);
|
||
}
|
||
if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
|
||
return SYMBOL_TYPE (sym);
|
||
}
|
||
}
|
||
|
||
/* Now search the static file-level symbols.
|
||
Not strictly correct, but more useful than an error.
|
||
Do the symtab's first, then
|
||
check the psymtab's. If a psymtab indicates the existence
|
||
of the desired name as a file-level static, then do psymtab-to-symtab
|
||
conversion on the fly and return the found symbol.
|
||
*/
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
|
||
sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
|
||
if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
|
||
{
|
||
return SYMBOL_TYPE (sym);
|
||
}
|
||
}
|
||
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
if (!ps->readin && lookup_partial_symbol (ps, name, NULL, 0, STRUCT_DOMAIN))
|
||
{
|
||
s = PSYMTAB_TO_SYMTAB (ps);
|
||
bv = BLOCKVECTOR (s);
|
||
block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
|
||
sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
|
||
if (!sym)
|
||
{
|
||
/* This shouldn't be necessary, but as a last resort
|
||
* try looking in the globals even though the psymtab
|
||
* claimed the symbol was static. It's possible that
|
||
* the psymtab gets it wrong in some cases.
|
||
*/
|
||
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
|
||
sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
|
||
if (!sym)
|
||
error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
|
||
%s may be an inlined function, or may be a template function\n\
|
||
(if a template, try specifying an instantiation: %s<type>)."),
|
||
name, ps->filename, name, name);
|
||
}
|
||
if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
|
||
return SYMBOL_TYPE (sym);
|
||
}
|
||
}
|
||
return (struct type *) 0;
|
||
}
|
||
|
||
|
||
/* Find the psymtab containing main(). */
|
||
/* FIXME: What about languages without main() or specially linked
|
||
executables that have no main() ? */
|
||
|
||
struct partial_symtab *
|
||
find_main_psymtab (void)
|
||
{
|
||
struct partial_symtab *pst;
|
||
struct objfile *objfile;
|
||
|
||
ALL_PSYMTABS (objfile, pst)
|
||
{
|
||
if (lookup_partial_symbol (pst, main_name (), NULL, 1, VAR_DOMAIN))
|
||
{
|
||
return (pst);
|
||
}
|
||
}
|
||
return (NULL);
|
||
}
|
||
|
||
/* Search BLOCK for symbol NAME in DOMAIN.
|
||
|
||
Note that if NAME is the demangled form of a C++ symbol, we will fail
|
||
to find a match during the binary search of the non-encoded names, but
|
||
for now we don't worry about the slight inefficiency of looking for
|
||
a match we'll never find, since it will go pretty quick. Once the
|
||
binary search terminates, we drop through and do a straight linear
|
||
search on the symbols. Each symbol which is marked as being a ObjC/C++
|
||
symbol (language_cplus or language_objc set) has both the encoded and
|
||
non-encoded names tested for a match.
|
||
|
||
If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
|
||
particular mangled name.
|
||
*/
|
||
|
||
struct symbol *
|
||
lookup_block_symbol (const struct block *block, const char *name,
|
||
const char *linkage_name,
|
||
const domain_enum domain)
|
||
{
|
||
struct dict_iterator iter;
|
||
struct symbol *sym;
|
||
|
||
if (!BLOCK_FUNCTION (block))
|
||
{
|
||
for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter);
|
||
sym != NULL;
|
||
sym = dict_iter_name_next (name, &iter))
|
||
{
|
||
if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
|
||
SYMBOL_DOMAIN (sym), domain)
|
||
&& (linkage_name != NULL
|
||
? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1))
|
||
return sym;
|
||
}
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
/* Note that parameter symbols do not always show up last in the
|
||
list; this loop makes sure to take anything else other than
|
||
parameter symbols first; it only uses parameter symbols as a
|
||
last resort. Note that this only takes up extra computation
|
||
time on a match. */
|
||
|
||
struct symbol *sym_found = NULL;
|
||
|
||
for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter);
|
||
sym != NULL;
|
||
sym = dict_iter_name_next (name, &iter))
|
||
{
|
||
if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
|
||
SYMBOL_DOMAIN (sym), domain)
|
||
&& (linkage_name != NULL
|
||
? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1))
|
||
{
|
||
sym_found = sym;
|
||
if (!SYMBOL_IS_ARGUMENT (sym))
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
return (sym_found); /* Will be NULL if not found. */
|
||
}
|
||
}
|
||
|
||
/* Find the symtab associated with PC and SECTION. Look through the
|
||
psymtabs and read in another symtab if necessary. */
|
||
|
||
struct symtab *
|
||
find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
|
||
{
|
||
struct block *b;
|
||
struct blockvector *bv;
|
||
struct symtab *s = NULL;
|
||
struct symtab *best_s = NULL;
|
||
struct partial_symtab *ps;
|
||
struct objfile *objfile;
|
||
CORE_ADDR distance = 0;
|
||
struct minimal_symbol *msymbol;
|
||
|
||
/* If we know that this is not a text address, return failure. This is
|
||
necessary because we loop based on the block's high and low code
|
||
addresses, which do not include the data ranges, and because
|
||
we call find_pc_sect_psymtab which has a similar restriction based
|
||
on the partial_symtab's texthigh and textlow. */
|
||
msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
|
||
if (msymbol
|
||
&& (MSYMBOL_TYPE (msymbol) == mst_data
|
||
|| MSYMBOL_TYPE (msymbol) == mst_bss
|
||
|| MSYMBOL_TYPE (msymbol) == mst_abs
|
||
|| MSYMBOL_TYPE (msymbol) == mst_file_data
|
||
|| MSYMBOL_TYPE (msymbol) == mst_file_bss))
|
||
return NULL;
|
||
|
||
/* Search all symtabs for the one whose file contains our address, and which
|
||
is the smallest of all the ones containing the address. This is designed
|
||
to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
|
||
and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
|
||
0x1000-0x4000, but for address 0x2345 we want to return symtab b.
|
||
|
||
This happens for native ecoff format, where code from included files
|
||
gets its own symtab. The symtab for the included file should have
|
||
been read in already via the dependency mechanism.
|
||
It might be swifter to create several symtabs with the same name
|
||
like xcoff does (I'm not sure).
|
||
|
||
It also happens for objfiles that have their functions reordered.
|
||
For these, the symtab we are looking for is not necessarily read in. */
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
bv = BLOCKVECTOR (s);
|
||
b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
|
||
|
||
if (BLOCK_START (b) <= pc
|
||
&& BLOCK_END (b) > pc
|
||
&& (distance == 0
|
||
|| BLOCK_END (b) - BLOCK_START (b) < distance))
|
||
{
|
||
/* For an objfile that has its functions reordered,
|
||
find_pc_psymtab will find the proper partial symbol table
|
||
and we simply return its corresponding symtab. */
|
||
/* In order to better support objfiles that contain both
|
||
stabs and coff debugging info, we continue on if a psymtab
|
||
can't be found. */
|
||
if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs)
|
||
{
|
||
ps = find_pc_sect_psymtab (pc, section);
|
||
if (ps)
|
||
return PSYMTAB_TO_SYMTAB (ps);
|
||
}
|
||
if (section != 0)
|
||
{
|
||
struct dict_iterator iter;
|
||
struct symbol *sym = NULL;
|
||
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
fixup_symbol_section (sym, objfile);
|
||
if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
|
||
break;
|
||
}
|
||
if (sym == NULL)
|
||
continue; /* no symbol in this symtab matches section */
|
||
}
|
||
distance = BLOCK_END (b) - BLOCK_START (b);
|
||
best_s = s;
|
||
}
|
||
}
|
||
|
||
if (best_s != NULL)
|
||
return (best_s);
|
||
|
||
s = NULL;
|
||
ps = find_pc_sect_psymtab (pc, section);
|
||
if (ps)
|
||
{
|
||
if (ps->readin)
|
||
/* Might want to error() here (in case symtab is corrupt and
|
||
will cause a core dump), but maybe we can successfully
|
||
continue, so let's not. */
|
||
warning (_("\
|
||
(Internal error: pc %s in read in psymtab, but not in symtab.)\n"),
|
||
paddress (get_objfile_arch (ps->objfile), pc));
|
||
s = PSYMTAB_TO_SYMTAB (ps);
|
||
}
|
||
return (s);
|
||
}
|
||
|
||
/* Find the symtab associated with PC. Look through the psymtabs and
|
||
read in another symtab if necessary. Backward compatibility, no section */
|
||
|
||
struct symtab *
|
||
find_pc_symtab (CORE_ADDR pc)
|
||
{
|
||
return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
|
||
}
|
||
|
||
|
||
/* Find the source file and line number for a given PC value and SECTION.
|
||
Return a structure containing a symtab pointer, a line number,
|
||
and a pc range for the entire source line.
|
||
The value's .pc field is NOT the specified pc.
|
||
NOTCURRENT nonzero means, if specified pc is on a line boundary,
|
||
use the line that ends there. Otherwise, in that case, the line
|
||
that begins there is used. */
|
||
|
||
/* The big complication here is that a line may start in one file, and end just
|
||
before the start of another file. This usually occurs when you #include
|
||
code in the middle of a subroutine. To properly find the end of a line's PC
|
||
range, we must search all symtabs associated with this compilation unit, and
|
||
find the one whose first PC is closer than that of the next line in this
|
||
symtab. */
|
||
|
||
/* If it's worth the effort, we could be using a binary search. */
|
||
|
||
struct symtab_and_line
|
||
find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
|
||
{
|
||
struct symtab *s;
|
||
struct linetable *l;
|
||
int len;
|
||
int i;
|
||
struct linetable_entry *item;
|
||
struct symtab_and_line val;
|
||
struct blockvector *bv;
|
||
struct minimal_symbol *msymbol;
|
||
struct minimal_symbol *mfunsym;
|
||
|
||
/* Info on best line seen so far, and where it starts, and its file. */
|
||
|
||
struct linetable_entry *best = NULL;
|
||
CORE_ADDR best_end = 0;
|
||
struct symtab *best_symtab = 0;
|
||
|
||
/* Store here the first line number
|
||
of a file which contains the line at the smallest pc after PC.
|
||
If we don't find a line whose range contains PC,
|
||
we will use a line one less than this,
|
||
with a range from the start of that file to the first line's pc. */
|
||
struct linetable_entry *alt = NULL;
|
||
struct symtab *alt_symtab = 0;
|
||
|
||
/* Info on best line seen in this file. */
|
||
|
||
struct linetable_entry *prev;
|
||
|
||
/* If this pc is not from the current frame,
|
||
it is the address of the end of a call instruction.
|
||
Quite likely that is the start of the following statement.
|
||
But what we want is the statement containing the instruction.
|
||
Fudge the pc to make sure we get that. */
|
||
|
||
init_sal (&val); /* initialize to zeroes */
|
||
|
||
/* It's tempting to assume that, if we can't find debugging info for
|
||
any function enclosing PC, that we shouldn't search for line
|
||
number info, either. However, GAS can emit line number info for
|
||
assembly files --- very helpful when debugging hand-written
|
||
assembly code. In such a case, we'd have no debug info for the
|
||
function, but we would have line info. */
|
||
|
||
if (notcurrent)
|
||
pc -= 1;
|
||
|
||
/* elz: added this because this function returned the wrong
|
||
information if the pc belongs to a stub (import/export)
|
||
to call a shlib function. This stub would be anywhere between
|
||
two functions in the target, and the line info was erroneously
|
||
taken to be the one of the line before the pc.
|
||
*/
|
||
/* RT: Further explanation:
|
||
|
||
* We have stubs (trampolines) inserted between procedures.
|
||
*
|
||
* Example: "shr1" exists in a shared library, and a "shr1" stub also
|
||
* exists in the main image.
|
||
*
|
||
* In the minimal symbol table, we have a bunch of symbols
|
||
* sorted by start address. The stubs are marked as "trampoline",
|
||
* the others appear as text. E.g.:
|
||
*
|
||
* Minimal symbol table for main image
|
||
* main: code for main (text symbol)
|
||
* shr1: stub (trampoline symbol)
|
||
* foo: code for foo (text symbol)
|
||
* ...
|
||
* Minimal symbol table for "shr1" image:
|
||
* ...
|
||
* shr1: code for shr1 (text symbol)
|
||
* ...
|
||
*
|
||
* So the code below is trying to detect if we are in the stub
|
||
* ("shr1" stub), and if so, find the real code ("shr1" trampoline),
|
||
* and if found, do the symbolization from the real-code address
|
||
* rather than the stub address.
|
||
*
|
||
* Assumptions being made about the minimal symbol table:
|
||
* 1. lookup_minimal_symbol_by_pc() will return a trampoline only
|
||
* if we're really in the trampoline. If we're beyond it (say
|
||
* we're in "foo" in the above example), it'll have a closer
|
||
* symbol (the "foo" text symbol for example) and will not
|
||
* return the trampoline.
|
||
* 2. lookup_minimal_symbol_text() will find a real text symbol
|
||
* corresponding to the trampoline, and whose address will
|
||
* be different than the trampoline address. I put in a sanity
|
||
* check for the address being the same, to avoid an
|
||
* infinite recursion.
|
||
*/
|
||
msymbol = lookup_minimal_symbol_by_pc (pc);
|
||
if (msymbol != NULL)
|
||
if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
|
||
{
|
||
mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
|
||
NULL);
|
||
if (mfunsym == NULL)
|
||
/* I eliminated this warning since it is coming out
|
||
* in the following situation:
|
||
* gdb shmain // test program with shared libraries
|
||
* (gdb) break shr1 // function in shared lib
|
||
* Warning: In stub for ...
|
||
* In the above situation, the shared lib is not loaded yet,
|
||
* so of course we can't find the real func/line info,
|
||
* but the "break" still works, and the warning is annoying.
|
||
* So I commented out the warning. RT */
|
||
/* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
|
||
/* fall through */
|
||
else if (SYMBOL_VALUE_ADDRESS (mfunsym) == SYMBOL_VALUE_ADDRESS (msymbol))
|
||
/* Avoid infinite recursion */
|
||
/* See above comment about why warning is commented out */
|
||
/* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
|
||
/* fall through */
|
||
else
|
||
return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
|
||
}
|
||
|
||
|
||
s = find_pc_sect_symtab (pc, section);
|
||
if (!s)
|
||
{
|
||
/* if no symbol information, return previous pc */
|
||
if (notcurrent)
|
||
pc++;
|
||
val.pc = pc;
|
||
return val;
|
||
}
|
||
|
||
bv = BLOCKVECTOR (s);
|
||
|
||
/* Look at all the symtabs that share this blockvector.
|
||
They all have the same apriori range, that we found was right;
|
||
but they have different line tables. */
|
||
|
||
for (; s && BLOCKVECTOR (s) == bv; s = s->next)
|
||
{
|
||
/* Find the best line in this symtab. */
|
||
l = LINETABLE (s);
|
||
if (!l)
|
||
continue;
|
||
len = l->nitems;
|
||
if (len <= 0)
|
||
{
|
||
/* I think len can be zero if the symtab lacks line numbers
|
||
(e.g. gcc -g1). (Either that or the LINETABLE is NULL;
|
||
I'm not sure which, and maybe it depends on the symbol
|
||
reader). */
|
||
continue;
|
||
}
|
||
|
||
prev = NULL;
|
||
item = l->item; /* Get first line info */
|
||
|
||
/* Is this file's first line closer than the first lines of other files?
|
||
If so, record this file, and its first line, as best alternate. */
|
||
if (item->pc > pc && (!alt || item->pc < alt->pc))
|
||
{
|
||
alt = item;
|
||
alt_symtab = s;
|
||
}
|
||
|
||
for (i = 0; i < len; i++, item++)
|
||
{
|
||
/* Leave prev pointing to the linetable entry for the last line
|
||
that started at or before PC. */
|
||
if (item->pc > pc)
|
||
break;
|
||
|
||
prev = item;
|
||
}
|
||
|
||
/* At this point, prev points at the line whose start addr is <= pc, and
|
||
item points at the next line. If we ran off the end of the linetable
|
||
(pc >= start of the last line), then prev == item. If pc < start of
|
||
the first line, prev will not be set. */
|
||
|
||
/* Is this file's best line closer than the best in the other files?
|
||
If so, record this file, and its best line, as best so far. Don't
|
||
save prev if it represents the end of a function (i.e. line number
|
||
0) instead of a real line. */
|
||
|
||
if (prev && prev->line && (!best || prev->pc > best->pc))
|
||
{
|
||
best = prev;
|
||
best_symtab = s;
|
||
|
||
/* Discard BEST_END if it's before the PC of the current BEST. */
|
||
if (best_end <= best->pc)
|
||
best_end = 0;
|
||
}
|
||
|
||
/* If another line (denoted by ITEM) is in the linetable and its
|
||
PC is after BEST's PC, but before the current BEST_END, then
|
||
use ITEM's PC as the new best_end. */
|
||
if (best && i < len && item->pc > best->pc
|
||
&& (best_end == 0 || best_end > item->pc))
|
||
best_end = item->pc;
|
||
}
|
||
|
||
if (!best_symtab)
|
||
{
|
||
/* If we didn't find any line number info, just return zeros.
|
||
We used to return alt->line - 1 here, but that could be
|
||
anywhere; if we don't have line number info for this PC,
|
||
don't make some up. */
|
||
val.pc = pc;
|
||
}
|
||
else if (best->line == 0)
|
||
{
|
||
/* If our best fit is in a range of PC's for which no line
|
||
number info is available (line number is zero) then we didn't
|
||
find any valid line information. */
|
||
val.pc = pc;
|
||
}
|
||
else
|
||
{
|
||
val.symtab = best_symtab;
|
||
val.line = best->line;
|
||
val.pc = best->pc;
|
||
if (best_end && (!alt || best_end < alt->pc))
|
||
val.end = best_end;
|
||
else if (alt)
|
||
val.end = alt->pc;
|
||
else
|
||
val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
|
||
}
|
||
val.section = section;
|
||
return val;
|
||
}
|
||
|
||
/* Backward compatibility (no section) */
|
||
|
||
struct symtab_and_line
|
||
find_pc_line (CORE_ADDR pc, int notcurrent)
|
||
{
|
||
struct obj_section *section;
|
||
|
||
section = find_pc_overlay (pc);
|
||
if (pc_in_unmapped_range (pc, section))
|
||
pc = overlay_mapped_address (pc, section);
|
||
return find_pc_sect_line (pc, section, notcurrent);
|
||
}
|
||
|
||
/* Find line number LINE in any symtab whose name is the same as
|
||
SYMTAB.
|
||
|
||
If found, return the symtab that contains the linetable in which it was
|
||
found, set *INDEX to the index in the linetable of the best entry
|
||
found, and set *EXACT_MATCH nonzero if the value returned is an
|
||
exact match.
|
||
|
||
If not found, return NULL. */
|
||
|
||
struct symtab *
|
||
find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match)
|
||
{
|
||
int exact = 0; /* Initialized here to avoid a compiler warning. */
|
||
|
||
/* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
|
||
so far seen. */
|
||
|
||
int best_index;
|
||
struct linetable *best_linetable;
|
||
struct symtab *best_symtab;
|
||
|
||
/* First try looking it up in the given symtab. */
|
||
best_linetable = LINETABLE (symtab);
|
||
best_symtab = symtab;
|
||
best_index = find_line_common (best_linetable, line, &exact);
|
||
if (best_index < 0 || !exact)
|
||
{
|
||
/* Didn't find an exact match. So we better keep looking for
|
||
another symtab with the same name. In the case of xcoff,
|
||
multiple csects for one source file (produced by IBM's FORTRAN
|
||
compiler) produce multiple symtabs (this is unavoidable
|
||
assuming csects can be at arbitrary places in memory and that
|
||
the GLOBAL_BLOCK of a symtab has a begin and end address). */
|
||
|
||
/* BEST is the smallest linenumber > LINE so far seen,
|
||
or 0 if none has been seen so far.
|
||
BEST_INDEX and BEST_LINETABLE identify the item for it. */
|
||
int best;
|
||
|
||
struct objfile *objfile;
|
||
struct symtab *s;
|
||
struct partial_symtab *p;
|
||
|
||
if (best_index >= 0)
|
||
best = best_linetable->item[best_index].line;
|
||
else
|
||
best = 0;
|
||
|
||
ALL_PSYMTABS (objfile, p)
|
||
{
|
||
if (strcmp (symtab->filename, p->filename) != 0)
|
||
continue;
|
||
PSYMTAB_TO_SYMTAB (p);
|
||
}
|
||
|
||
ALL_SYMTABS (objfile, s)
|
||
{
|
||
struct linetable *l;
|
||
int ind;
|
||
|
||
if (strcmp (symtab->filename, s->filename) != 0)
|
||
continue;
|
||
l = LINETABLE (s);
|
||
ind = find_line_common (l, line, &exact);
|
||
if (ind >= 0)
|
||
{
|
||
if (exact)
|
||
{
|
||
best_index = ind;
|
||
best_linetable = l;
|
||
best_symtab = s;
|
||
goto done;
|
||
}
|
||
if (best == 0 || l->item[ind].line < best)
|
||
{
|
||
best = l->item[ind].line;
|
||
best_index = ind;
|
||
best_linetable = l;
|
||
best_symtab = s;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
done:
|
||
if (best_index < 0)
|
||
return NULL;
|
||
|
||
if (index)
|
||
*index = best_index;
|
||
if (exact_match)
|
||
*exact_match = exact;
|
||
|
||
return best_symtab;
|
||
}
|
||
|
||
/* Set the PC value for a given source file and line number and return true.
|
||
Returns zero for invalid line number (and sets the PC to 0).
|
||
The source file is specified with a struct symtab. */
|
||
|
||
int
|
||
find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
|
||
{
|
||
struct linetable *l;
|
||
int ind;
|
||
|
||
*pc = 0;
|
||
if (symtab == 0)
|
||
return 0;
|
||
|
||
symtab = find_line_symtab (symtab, line, &ind, NULL);
|
||
if (symtab != NULL)
|
||
{
|
||
l = LINETABLE (symtab);
|
||
*pc = l->item[ind].pc;
|
||
return 1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
/* Find the range of pc values in a line.
|
||
Store the starting pc of the line into *STARTPTR
|
||
and the ending pc (start of next line) into *ENDPTR.
|
||
Returns 1 to indicate success.
|
||
Returns 0 if could not find the specified line. */
|
||
|
||
int
|
||
find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
|
||
CORE_ADDR *endptr)
|
||
{
|
||
CORE_ADDR startaddr;
|
||
struct symtab_and_line found_sal;
|
||
|
||
startaddr = sal.pc;
|
||
if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
|
||
return 0;
|
||
|
||
/* This whole function is based on address. For example, if line 10 has
|
||
two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
|
||
"info line *0x123" should say the line goes from 0x100 to 0x200
|
||
and "info line *0x355" should say the line goes from 0x300 to 0x400.
|
||
This also insures that we never give a range like "starts at 0x134
|
||
and ends at 0x12c". */
|
||
|
||
found_sal = find_pc_sect_line (startaddr, sal.section, 0);
|
||
if (found_sal.line != sal.line)
|
||
{
|
||
/* The specified line (sal) has zero bytes. */
|
||
*startptr = found_sal.pc;
|
||
*endptr = found_sal.pc;
|
||
}
|
||
else
|
||
{
|
||
*startptr = found_sal.pc;
|
||
*endptr = found_sal.end;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/* Given a line table and a line number, return the index into the line
|
||
table for the pc of the nearest line whose number is >= the specified one.
|
||
Return -1 if none is found. The value is >= 0 if it is an index.
|
||
|
||
Set *EXACT_MATCH nonzero if the value returned is an exact match. */
|
||
|
||
static int
|
||
find_line_common (struct linetable *l, int lineno,
|
||
int *exact_match)
|
||
{
|
||
int i;
|
||
int len;
|
||
|
||
/* BEST is the smallest linenumber > LINENO so far seen,
|
||
or 0 if none has been seen so far.
|
||
BEST_INDEX identifies the item for it. */
|
||
|
||
int best_index = -1;
|
||
int best = 0;
|
||
|
||
*exact_match = 0;
|
||
|
||
if (lineno <= 0)
|
||
return -1;
|
||
if (l == 0)
|
||
return -1;
|
||
|
||
len = l->nitems;
|
||
for (i = 0; i < len; i++)
|
||
{
|
||
struct linetable_entry *item = &(l->item[i]);
|
||
|
||
if (item->line == lineno)
|
||
{
|
||
/* Return the first (lowest address) entry which matches. */
|
||
*exact_match = 1;
|
||
return i;
|
||
}
|
||
|
||
if (item->line > lineno && (best == 0 || item->line < best))
|
||
{
|
||
best = item->line;
|
||
best_index = i;
|
||
}
|
||
}
|
||
|
||
/* If we got here, we didn't get an exact match. */
|
||
return best_index;
|
||
}
|
||
|
||
int
|
||
find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
|
||
{
|
||
struct symtab_and_line sal;
|
||
sal = find_pc_line (pc, 0);
|
||
*startptr = sal.pc;
|
||
*endptr = sal.end;
|
||
return sal.symtab != 0;
|
||
}
|
||
|
||
/* Given a function start address PC and SECTION, find the first
|
||
address after the function prologue. */
|
||
CORE_ADDR
|
||
find_function_start_pc (struct gdbarch *gdbarch,
|
||
CORE_ADDR pc, struct obj_section *section)
|
||
{
|
||
/* If the function is in an unmapped overlay, use its unmapped LMA address,
|
||
so that gdbarch_skip_prologue has something unique to work on. */
|
||
if (section_is_overlay (section) && !section_is_mapped (section))
|
||
pc = overlay_unmapped_address (pc, section);
|
||
|
||
pc += gdbarch_deprecated_function_start_offset (gdbarch);
|
||
pc = gdbarch_skip_prologue (gdbarch, pc);
|
||
|
||
/* For overlays, map pc back into its mapped VMA range. */
|
||
pc = overlay_mapped_address (pc, section);
|
||
|
||
return pc;
|
||
}
|
||
|
||
/* Given a function start address FUNC_ADDR and SYMTAB, find the first
|
||
address for that function that has an entry in SYMTAB's line info
|
||
table. If such an entry cannot be found, return FUNC_ADDR
|
||
unaltered. */
|
||
CORE_ADDR
|
||
skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
|
||
{
|
||
CORE_ADDR func_start, func_end;
|
||
struct linetable *l;
|
||
int ind, i, len;
|
||
int best_lineno = 0;
|
||
CORE_ADDR best_pc = func_addr;
|
||
|
||
/* Give up if this symbol has no lineinfo table. */
|
||
l = LINETABLE (symtab);
|
||
if (l == NULL)
|
||
return func_addr;
|
||
|
||
/* Get the range for the function's PC values, or give up if we
|
||
cannot, for some reason. */
|
||
if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
|
||
return func_addr;
|
||
|
||
/* Linetable entries are ordered by PC values, see the commentary in
|
||
symtab.h where `struct linetable' is defined. Thus, the first
|
||
entry whose PC is in the range [FUNC_START..FUNC_END[ is the
|
||
address we are looking for. */
|
||
for (i = 0; i < l->nitems; i++)
|
||
{
|
||
struct linetable_entry *item = &(l->item[i]);
|
||
|
||
/* Don't use line numbers of zero, they mark special entries in
|
||
the table. See the commentary on symtab.h before the
|
||
definition of struct linetable. */
|
||
if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
|
||
return item->pc;
|
||
}
|
||
|
||
return func_addr;
|
||
}
|
||
|
||
/* Given a function symbol SYM, find the symtab and line for the start
|
||
of the function.
|
||
If the argument FUNFIRSTLINE is nonzero, we want the first line
|
||
of real code inside the function. */
|
||
|
||
struct symtab_and_line
|
||
find_function_start_sal (struct symbol *sym, int funfirstline)
|
||
{
|
||
struct block *block = SYMBOL_BLOCK_VALUE (sym);
|
||
struct objfile *objfile = lookup_objfile_from_block (block);
|
||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||
|
||
CORE_ADDR pc;
|
||
struct symtab_and_line sal;
|
||
struct block *b, *function_block;
|
||
|
||
pc = BLOCK_START (block);
|
||
fixup_symbol_section (sym, objfile);
|
||
if (funfirstline)
|
||
{
|
||
/* Skip "first line" of function (which is actually its prologue). */
|
||
pc = find_function_start_pc (gdbarch, pc, SYMBOL_OBJ_SECTION (sym));
|
||
}
|
||
sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0);
|
||
|
||
/* Check if gdbarch_skip_prologue left us in mid-line, and the next
|
||
line is still part of the same function. */
|
||
if (sal.pc != pc
|
||
&& BLOCK_START (block) <= sal.end
|
||
&& sal.end < BLOCK_END (block))
|
||
{
|
||
/* First pc of next line */
|
||
pc = sal.end;
|
||
/* Recalculate the line number (might not be N+1). */
|
||
sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0);
|
||
}
|
||
|
||
/* On targets with executable formats that don't have a concept of
|
||
constructors (ELF with .init has, PE doesn't), gcc emits a call
|
||
to `__main' in `main' between the prologue and before user
|
||
code. */
|
||
if (funfirstline
|
||
&& gdbarch_skip_main_prologue_p (gdbarch)
|
||
&& SYMBOL_LINKAGE_NAME (sym)
|
||
&& strcmp (SYMBOL_LINKAGE_NAME (sym), "main") == 0)
|
||
{
|
||
pc = gdbarch_skip_main_prologue (gdbarch, pc);
|
||
/* Recalculate the line number (might not be N+1). */
|
||
sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0);
|
||
}
|
||
|
||
/* If we still don't have a valid source line, try to find the first
|
||
PC in the lineinfo table that belongs to the same function. This
|
||
happens with COFF debug info, which does not seem to have an
|
||
entry in lineinfo table for the code after the prologue which has
|
||
no direct relation to source. For example, this was found to be
|
||
the case with the DJGPP target using "gcc -gcoff" when the
|
||
compiler inserted code after the prologue to make sure the stack
|
||
is aligned. */
|
||
if (funfirstline && sal.symtab == NULL)
|
||
{
|
||
pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
|
||
/* Recalculate the line number. */
|
||
sal = find_pc_sect_line (pc, SYMBOL_OBJ_SECTION (sym), 0);
|
||
}
|
||
|
||
sal.pc = pc;
|
||
|
||
/* Check if we are now inside an inlined function. If we can,
|
||
use the call site of the function instead. */
|
||
b = block_for_pc_sect (sal.pc, SYMBOL_OBJ_SECTION (sym));
|
||
function_block = NULL;
|
||
while (b != NULL)
|
||
{
|
||
if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
|
||
function_block = b;
|
||
else if (BLOCK_FUNCTION (b) != NULL)
|
||
break;
|
||
b = BLOCK_SUPERBLOCK (b);
|
||
}
|
||
if (function_block != NULL
|
||
&& SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
|
||
{
|
||
sal.line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
|
||
sal.symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
|
||
}
|
||
|
||
return sal;
|
||
}
|
||
|
||
/* If P is of the form "operator[ \t]+..." where `...' is
|
||
some legitimate operator text, return a pointer to the
|
||
beginning of the substring of the operator text.
|
||
Otherwise, return "". */
|
||
char *
|
||
operator_chars (char *p, char **end)
|
||
{
|
||
*end = "";
|
||
if (strncmp (p, "operator", 8))
|
||
return *end;
|
||
p += 8;
|
||
|
||
/* Don't get faked out by `operator' being part of a longer
|
||
identifier. */
|
||
if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
|
||
return *end;
|
||
|
||
/* Allow some whitespace between `operator' and the operator symbol. */
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
|
||
/* Recognize 'operator TYPENAME'. */
|
||
|
||
if (isalpha (*p) || *p == '_' || *p == '$')
|
||
{
|
||
char *q = p + 1;
|
||
while (isalnum (*q) || *q == '_' || *q == '$')
|
||
q++;
|
||
*end = q;
|
||
return p;
|
||
}
|
||
|
||
while (*p)
|
||
switch (*p)
|
||
{
|
||
case '\\': /* regexp quoting */
|
||
if (p[1] == '*')
|
||
{
|
||
if (p[2] == '=') /* 'operator\*=' */
|
||
*end = p + 3;
|
||
else /* 'operator\*' */
|
||
*end = p + 2;
|
||
return p;
|
||
}
|
||
else if (p[1] == '[')
|
||
{
|
||
if (p[2] == ']')
|
||
error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
|
||
else if (p[2] == '\\' && p[3] == ']')
|
||
{
|
||
*end = p + 4; /* 'operator\[\]' */
|
||
return p;
|
||
}
|
||
else
|
||
error (_("nothing is allowed between '[' and ']'"));
|
||
}
|
||
else
|
||
{
|
||
/* Gratuitous qoute: skip it and move on. */
|
||
p++;
|
||
continue;
|
||
}
|
||
break;
|
||
case '!':
|
||
case '=':
|
||
case '*':
|
||
case '/':
|
||
case '%':
|
||
case '^':
|
||
if (p[1] == '=')
|
||
*end = p + 2;
|
||
else
|
||
*end = p + 1;
|
||
return p;
|
||
case '<':
|
||
case '>':
|
||
case '+':
|
||
case '-':
|
||
case '&':
|
||
case '|':
|
||
if (p[0] == '-' && p[1] == '>')
|
||
{
|
||
/* Struct pointer member operator 'operator->'. */
|
||
if (p[2] == '*')
|
||
{
|
||
*end = p + 3; /* 'operator->*' */
|
||
return p;
|
||
}
|
||
else if (p[2] == '\\')
|
||
{
|
||
*end = p + 4; /* Hopefully 'operator->\*' */
|
||
return p;
|
||
}
|
||
else
|
||
{
|
||
*end = p + 2; /* 'operator->' */
|
||
return p;
|
||
}
|
||
}
|
||
if (p[1] == '=' || p[1] == p[0])
|
||
*end = p + 2;
|
||
else
|
||
*end = p + 1;
|
||
return p;
|
||
case '~':
|
||
case ',':
|
||
*end = p + 1;
|
||
return p;
|
||
case '(':
|
||
if (p[1] != ')')
|
||
error (_("`operator ()' must be specified without whitespace in `()'"));
|
||
*end = p + 2;
|
||
return p;
|
||
case '?':
|
||
if (p[1] != ':')
|
||
error (_("`operator ?:' must be specified without whitespace in `?:'"));
|
||
*end = p + 2;
|
||
return p;
|
||
case '[':
|
||
if (p[1] != ']')
|
||
error (_("`operator []' must be specified without whitespace in `[]'"));
|
||
*end = p + 2;
|
||
return p;
|
||
default:
|
||
error (_("`operator %s' not supported"), p);
|
||
break;
|
||
}
|
||
|
||
*end = "";
|
||
return *end;
|
||
}
|
||
|
||
|
||
/* If FILE is not already in the table of files, return zero;
|
||
otherwise return non-zero. Optionally add FILE to the table if ADD
|
||
is non-zero. If *FIRST is non-zero, forget the old table
|
||
contents. */
|
||
static int
|
||
filename_seen (const char *file, int add, int *first)
|
||
{
|
||
/* Table of files seen so far. */
|
||
static const char **tab = NULL;
|
||
/* Allocated size of tab in elements.
|
||
Start with one 256-byte block (when using GNU malloc.c).
|
||
24 is the malloc overhead when range checking is in effect. */
|
||
static int tab_alloc_size = (256 - 24) / sizeof (char *);
|
||
/* Current size of tab in elements. */
|
||
static int tab_cur_size;
|
||
const char **p;
|
||
|
||
if (*first)
|
||
{
|
||
if (tab == NULL)
|
||
tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
|
||
tab_cur_size = 0;
|
||
}
|
||
|
||
/* Is FILE in tab? */
|
||
for (p = tab; p < tab + tab_cur_size; p++)
|
||
if (strcmp (*p, file) == 0)
|
||
return 1;
|
||
|
||
/* No; maybe add it to tab. */
|
||
if (add)
|
||
{
|
||
if (tab_cur_size == tab_alloc_size)
|
||
{
|
||
tab_alloc_size *= 2;
|
||
tab = (const char **) xrealloc ((char *) tab,
|
||
tab_alloc_size * sizeof (*tab));
|
||
}
|
||
tab[tab_cur_size++] = file;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Slave routine for sources_info. Force line breaks at ,'s.
|
||
NAME is the name to print and *FIRST is nonzero if this is the first
|
||
name printed. Set *FIRST to zero. */
|
||
static void
|
||
output_source_filename (const char *name, int *first)
|
||
{
|
||
/* Since a single source file can result in several partial symbol
|
||
tables, we need to avoid printing it more than once. Note: if
|
||
some of the psymtabs are read in and some are not, it gets
|
||
printed both under "Source files for which symbols have been
|
||
read" and "Source files for which symbols will be read in on
|
||
demand". I consider this a reasonable way to deal with the
|
||
situation. I'm not sure whether this can also happen for
|
||
symtabs; it doesn't hurt to check. */
|
||
|
||
/* Was NAME already seen? */
|
||
if (filename_seen (name, 1, first))
|
||
{
|
||
/* Yes; don't print it again. */
|
||
return;
|
||
}
|
||
/* No; print it and reset *FIRST. */
|
||
if (*first)
|
||
{
|
||
*first = 0;
|
||
}
|
||
else
|
||
{
|
||
printf_filtered (", ");
|
||
}
|
||
|
||
wrap_here ("");
|
||
fputs_filtered (name, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
sources_info (char *ignore, int from_tty)
|
||
{
|
||
struct symtab *s;
|
||
struct partial_symtab *ps;
|
||
struct objfile *objfile;
|
||
int first;
|
||
|
||
if (!have_full_symbols () && !have_partial_symbols ())
|
||
{
|
||
error (_("No symbol table is loaded. Use the \"file\" command."));
|
||
}
|
||
|
||
printf_filtered ("Source files for which symbols have been read in:\n\n");
|
||
|
||
first = 1;
|
||
ALL_SYMTABS (objfile, s)
|
||
{
|
||
const char *fullname = symtab_to_fullname (s);
|
||
output_source_filename (fullname ? fullname : s->filename, &first);
|
||
}
|
||
printf_filtered ("\n\n");
|
||
|
||
printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
|
||
|
||
first = 1;
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
if (!ps->readin)
|
||
{
|
||
const char *fullname = psymtab_to_fullname (ps);
|
||
output_source_filename (fullname ? fullname : ps->filename, &first);
|
||
}
|
||
}
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
static int
|
||
file_matches (char *file, char *files[], int nfiles)
|
||
{
|
||
int i;
|
||
|
||
if (file != NULL && nfiles != 0)
|
||
{
|
||
for (i = 0; i < nfiles; i++)
|
||
{
|
||
if (strcmp (files[i], lbasename (file)) == 0)
|
||
return 1;
|
||
}
|
||
}
|
||
else if (nfiles == 0)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
/* Free any memory associated with a search. */
|
||
void
|
||
free_search_symbols (struct symbol_search *symbols)
|
||
{
|
||
struct symbol_search *p;
|
||
struct symbol_search *next;
|
||
|
||
for (p = symbols; p != NULL; p = next)
|
||
{
|
||
next = p->next;
|
||
xfree (p);
|
||
}
|
||
}
|
||
|
||
static void
|
||
do_free_search_symbols_cleanup (void *symbols)
|
||
{
|
||
free_search_symbols (symbols);
|
||
}
|
||
|
||
struct cleanup *
|
||
make_cleanup_free_search_symbols (struct symbol_search *symbols)
|
||
{
|
||
return make_cleanup (do_free_search_symbols_cleanup, symbols);
|
||
}
|
||
|
||
/* Helper function for sort_search_symbols and qsort. Can only
|
||
sort symbols, not minimal symbols. */
|
||
static int
|
||
compare_search_syms (const void *sa, const void *sb)
|
||
{
|
||
struct symbol_search **sym_a = (struct symbol_search **) sa;
|
||
struct symbol_search **sym_b = (struct symbol_search **) sb;
|
||
|
||
return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
|
||
SYMBOL_PRINT_NAME ((*sym_b)->symbol));
|
||
}
|
||
|
||
/* Sort the ``nfound'' symbols in the list after prevtail. Leave
|
||
prevtail where it is, but update its next pointer to point to
|
||
the first of the sorted symbols. */
|
||
static struct symbol_search *
|
||
sort_search_symbols (struct symbol_search *prevtail, int nfound)
|
||
{
|
||
struct symbol_search **symbols, *symp, *old_next;
|
||
int i;
|
||
|
||
symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
|
||
* nfound);
|
||
symp = prevtail->next;
|
||
for (i = 0; i < nfound; i++)
|
||
{
|
||
symbols[i] = symp;
|
||
symp = symp->next;
|
||
}
|
||
/* Generally NULL. */
|
||
old_next = symp;
|
||
|
||
qsort (symbols, nfound, sizeof (struct symbol_search *),
|
||
compare_search_syms);
|
||
|
||
symp = prevtail;
|
||
for (i = 0; i < nfound; i++)
|
||
{
|
||
symp->next = symbols[i];
|
||
symp = symp->next;
|
||
}
|
||
symp->next = old_next;
|
||
|
||
xfree (symbols);
|
||
return symp;
|
||
}
|
||
|
||
/* Search the symbol table for matches to the regular expression REGEXP,
|
||
returning the results in *MATCHES.
|
||
|
||
Only symbols of KIND are searched:
|
||
FUNCTIONS_DOMAIN - search all functions
|
||
TYPES_DOMAIN - search all type names
|
||
VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
|
||
and constants (enums)
|
||
|
||
free_search_symbols should be called when *MATCHES is no longer needed.
|
||
|
||
The results are sorted locally; each symtab's global and static blocks are
|
||
separately alphabetized.
|
||
*/
|
||
void
|
||
search_symbols (char *regexp, domain_enum kind, int nfiles, char *files[],
|
||
struct symbol_search **matches)
|
||
{
|
||
struct symtab *s;
|
||
struct partial_symtab *ps;
|
||
struct blockvector *bv;
|
||
struct block *b;
|
||
int i = 0;
|
||
struct dict_iterator iter;
|
||
struct symbol *sym;
|
||
struct partial_symbol **psym;
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
char *val;
|
||
int found_misc = 0;
|
||
static enum minimal_symbol_type types[]
|
||
=
|
||
{mst_data, mst_text, mst_abs, mst_unknown};
|
||
static enum minimal_symbol_type types2[]
|
||
=
|
||
{mst_bss, mst_file_text, mst_abs, mst_unknown};
|
||
static enum minimal_symbol_type types3[]
|
||
=
|
||
{mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
|
||
static enum minimal_symbol_type types4[]
|
||
=
|
||
{mst_file_bss, mst_text, mst_abs, mst_unknown};
|
||
enum minimal_symbol_type ourtype;
|
||
enum minimal_symbol_type ourtype2;
|
||
enum minimal_symbol_type ourtype3;
|
||
enum minimal_symbol_type ourtype4;
|
||
struct symbol_search *sr;
|
||
struct symbol_search *psr;
|
||
struct symbol_search *tail;
|
||
struct cleanup *old_chain = NULL;
|
||
|
||
if (kind < VARIABLES_DOMAIN)
|
||
error (_("must search on specific domain"));
|
||
|
||
ourtype = types[(int) (kind - VARIABLES_DOMAIN)];
|
||
ourtype2 = types2[(int) (kind - VARIABLES_DOMAIN)];
|
||
ourtype3 = types3[(int) (kind - VARIABLES_DOMAIN)];
|
||
ourtype4 = types4[(int) (kind - VARIABLES_DOMAIN)];
|
||
|
||
sr = *matches = NULL;
|
||
tail = NULL;
|
||
|
||
if (regexp != NULL)
|
||
{
|
||
/* Make sure spacing is right for C++ operators.
|
||
This is just a courtesy to make the matching less sensitive
|
||
to how many spaces the user leaves between 'operator'
|
||
and <TYPENAME> or <OPERATOR>. */
|
||
char *opend;
|
||
char *opname = operator_chars (regexp, &opend);
|
||
if (*opname)
|
||
{
|
||
int fix = -1; /* -1 means ok; otherwise number of spaces needed. */
|
||
if (isalpha (*opname) || *opname == '_' || *opname == '$')
|
||
{
|
||
/* There should 1 space between 'operator' and 'TYPENAME'. */
|
||
if (opname[-1] != ' ' || opname[-2] == ' ')
|
||
fix = 1;
|
||
}
|
||
else
|
||
{
|
||
/* There should 0 spaces between 'operator' and 'OPERATOR'. */
|
||
if (opname[-1] == ' ')
|
||
fix = 0;
|
||
}
|
||
/* If wrong number of spaces, fix it. */
|
||
if (fix >= 0)
|
||
{
|
||
char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
|
||
sprintf (tmp, "operator%.*s%s", fix, " ", opname);
|
||
regexp = tmp;
|
||
}
|
||
}
|
||
|
||
if (0 != (val = re_comp (regexp)))
|
||
error (_("Invalid regexp (%s): %s"), val, regexp);
|
||
}
|
||
|
||
/* Search through the partial symtabs *first* for all symbols
|
||
matching the regexp. That way we don't have to reproduce all of
|
||
the machinery below. */
|
||
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
struct partial_symbol **bound, **gbound, **sbound;
|
||
int keep_going = 1;
|
||
|
||
if (ps->readin)
|
||
continue;
|
||
|
||
gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms;
|
||
sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms;
|
||
bound = gbound;
|
||
|
||
/* Go through all of the symbols stored in a partial
|
||
symtab in one loop. */
|
||
psym = objfile->global_psymbols.list + ps->globals_offset;
|
||
while (keep_going)
|
||
{
|
||
if (psym >= bound)
|
||
{
|
||
if (bound == gbound && ps->n_static_syms != 0)
|
||
{
|
||
psym = objfile->static_psymbols.list + ps->statics_offset;
|
||
bound = sbound;
|
||
}
|
||
else
|
||
keep_going = 0;
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
QUIT;
|
||
|
||
/* If it would match (logic taken from loop below)
|
||
load the file and go on to the next one. We check the
|
||
filename here, but that's a bit bogus: we don't know
|
||
what file it really comes from until we have full
|
||
symtabs. The symbol might be in a header file included by
|
||
this psymtab. This only affects Insight. */
|
||
if (file_matches (ps->filename, files, nfiles)
|
||
&& ((regexp == NULL
|
||
|| re_exec (SYMBOL_NATURAL_NAME (*psym)) != 0)
|
||
&& ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (*psym) != LOC_TYPEDEF
|
||
&& SYMBOL_CLASS (*psym) != LOC_BLOCK)
|
||
|| (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK)
|
||
|| (kind == TYPES_DOMAIN && SYMBOL_CLASS (*psym) == LOC_TYPEDEF))))
|
||
{
|
||
PSYMTAB_TO_SYMTAB (ps);
|
||
keep_going = 0;
|
||
}
|
||
}
|
||
psym++;
|
||
}
|
||
}
|
||
|
||
/* Here, we search through the minimal symbol tables for functions
|
||
and variables that match, and force their symbols to be read.
|
||
This is in particular necessary for demangled variable names,
|
||
which are no longer put into the partial symbol tables.
|
||
The symbol will then be found during the scan of symtabs below.
|
||
|
||
For functions, find_pc_symtab should succeed if we have debug info
|
||
for the function, for variables we have to call lookup_symbol
|
||
to determine if the variable has debug info.
|
||
If the lookup fails, set found_misc so that we will rescan to print
|
||
any matching symbols without debug info.
|
||
*/
|
||
|
||
if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
|
||
{
|
||
ALL_MSYMBOLS (objfile, msymbol)
|
||
{
|
||
QUIT;
|
||
|
||
if (MSYMBOL_TYPE (msymbol) == ourtype ||
|
||
MSYMBOL_TYPE (msymbol) == ourtype2 ||
|
||
MSYMBOL_TYPE (msymbol) == ourtype3 ||
|
||
MSYMBOL_TYPE (msymbol) == ourtype4)
|
||
{
|
||
if (regexp == NULL
|
||
|| re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
|
||
{
|
||
if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
|
||
{
|
||
/* FIXME: carlton/2003-02-04: Given that the
|
||
semantics of lookup_symbol keeps on changing
|
||
slightly, it would be a nice idea if we had a
|
||
function lookup_symbol_minsym that found the
|
||
symbol associated to a given minimal symbol (if
|
||
any). */
|
||
if (kind == FUNCTIONS_DOMAIN
|
||
|| lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
|
||
(struct block *) NULL,
|
||
VAR_DOMAIN, 0)
|
||
== NULL)
|
||
found_misc = 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
bv = BLOCKVECTOR (s);
|
||
for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
|
||
{
|
||
struct symbol_search *prevtail = tail;
|
||
int nfound = 0;
|
||
b = BLOCKVECTOR_BLOCK (bv, i);
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
|
||
QUIT;
|
||
|
||
if (file_matches (real_symtab->filename, files, nfiles)
|
||
&& ((regexp == NULL
|
||
|| re_exec (SYMBOL_NATURAL_NAME (sym)) != 0)
|
||
&& ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (sym) != LOC_TYPEDEF
|
||
&& SYMBOL_CLASS (sym) != LOC_BLOCK
|
||
&& SYMBOL_CLASS (sym) != LOC_CONST)
|
||
|| (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK)
|
||
|| (kind == TYPES_DOMAIN && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
|
||
{
|
||
/* match */
|
||
psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
|
||
psr->block = i;
|
||
psr->symtab = real_symtab;
|
||
psr->symbol = sym;
|
||
psr->msymbol = NULL;
|
||
psr->next = NULL;
|
||
if (tail == NULL)
|
||
sr = psr;
|
||
else
|
||
tail->next = psr;
|
||
tail = psr;
|
||
nfound ++;
|
||
}
|
||
}
|
||
if (nfound > 0)
|
||
{
|
||
if (prevtail == NULL)
|
||
{
|
||
struct symbol_search dummy;
|
||
|
||
dummy.next = sr;
|
||
tail = sort_search_symbols (&dummy, nfound);
|
||
sr = dummy.next;
|
||
|
||
old_chain = make_cleanup_free_search_symbols (sr);
|
||
}
|
||
else
|
||
tail = sort_search_symbols (prevtail, nfound);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If there are no eyes, avoid all contact. I mean, if there are
|
||
no debug symbols, then print directly from the msymbol_vector. */
|
||
|
||
if (found_misc || kind != FUNCTIONS_DOMAIN)
|
||
{
|
||
ALL_MSYMBOLS (objfile, msymbol)
|
||
{
|
||
QUIT;
|
||
|
||
if (MSYMBOL_TYPE (msymbol) == ourtype ||
|
||
MSYMBOL_TYPE (msymbol) == ourtype2 ||
|
||
MSYMBOL_TYPE (msymbol) == ourtype3 ||
|
||
MSYMBOL_TYPE (msymbol) == ourtype4)
|
||
{
|
||
if (regexp == NULL
|
||
|| re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
|
||
{
|
||
/* Functions: Look up by address. */
|
||
if (kind != FUNCTIONS_DOMAIN ||
|
||
(0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
|
||
{
|
||
/* Variables/Absolutes: Look up by name */
|
||
if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
|
||
(struct block *) NULL, VAR_DOMAIN, 0)
|
||
== NULL)
|
||
{
|
||
/* match */
|
||
psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
|
||
psr->block = i;
|
||
psr->msymbol = msymbol;
|
||
psr->symtab = NULL;
|
||
psr->symbol = NULL;
|
||
psr->next = NULL;
|
||
if (tail == NULL)
|
||
{
|
||
sr = psr;
|
||
old_chain = make_cleanup_free_search_symbols (sr);
|
||
}
|
||
else
|
||
tail->next = psr;
|
||
tail = psr;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
*matches = sr;
|
||
if (sr != NULL)
|
||
discard_cleanups (old_chain);
|
||
}
|
||
|
||
/* Helper function for symtab_symbol_info, this function uses
|
||
the data returned from search_symbols() to print information
|
||
regarding the match to gdb_stdout.
|
||
*/
|
||
static void
|
||
print_symbol_info (domain_enum kind, struct symtab *s, struct symbol *sym,
|
||
int block, char *last)
|
||
{
|
||
if (last == NULL || strcmp (last, s->filename) != 0)
|
||
{
|
||
fputs_filtered ("\nFile ", gdb_stdout);
|
||
fputs_filtered (s->filename, gdb_stdout);
|
||
fputs_filtered (":\n", gdb_stdout);
|
||
}
|
||
|
||
if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
|
||
printf_filtered ("static ");
|
||
|
||
/* Typedef that is not a C++ class */
|
||
if (kind == TYPES_DOMAIN
|
||
&& SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
|
||
typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
|
||
/* variable, func, or typedef-that-is-c++-class */
|
||
else if (kind < TYPES_DOMAIN ||
|
||
(kind == TYPES_DOMAIN &&
|
||
SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
|
||
{
|
||
type_print (SYMBOL_TYPE (sym),
|
||
(SYMBOL_CLASS (sym) == LOC_TYPEDEF
|
||
? "" : SYMBOL_PRINT_NAME (sym)),
|
||
gdb_stdout, 0);
|
||
|
||
printf_filtered (";\n");
|
||
}
|
||
}
|
||
|
||
/* This help function for symtab_symbol_info() prints information
|
||
for non-debugging symbols to gdb_stdout.
|
||
*/
|
||
static void
|
||
print_msymbol_info (struct minimal_symbol *msymbol)
|
||
{
|
||
struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
|
||
char *tmp;
|
||
|
||
if (gdbarch_addr_bit (gdbarch) <= 32)
|
||
tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
|
||
& (CORE_ADDR) 0xffffffff,
|
||
8);
|
||
else
|
||
tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
|
||
16);
|
||
printf_filtered ("%s %s\n",
|
||
tmp, SYMBOL_PRINT_NAME (msymbol));
|
||
}
|
||
|
||
/* This is the guts of the commands "info functions", "info types", and
|
||
"info variables". It calls search_symbols to find all matches and then
|
||
print_[m]symbol_info to print out some useful information about the
|
||
matches.
|
||
*/
|
||
static void
|
||
symtab_symbol_info (char *regexp, domain_enum kind, int from_tty)
|
||
{
|
||
static char *classnames[]
|
||
=
|
||
{"variable", "function", "type", "method"};
|
||
struct symbol_search *symbols;
|
||
struct symbol_search *p;
|
||
struct cleanup *old_chain;
|
||
char *last_filename = NULL;
|
||
int first = 1;
|
||
|
||
/* must make sure that if we're interrupted, symbols gets freed */
|
||
search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
|
||
old_chain = make_cleanup_free_search_symbols (symbols);
|
||
|
||
printf_filtered (regexp
|
||
? "All %ss matching regular expression \"%s\":\n"
|
||
: "All defined %ss:\n",
|
||
classnames[(int) (kind - VARIABLES_DOMAIN)], regexp);
|
||
|
||
for (p = symbols; p != NULL; p = p->next)
|
||
{
|
||
QUIT;
|
||
|
||
if (p->msymbol != NULL)
|
||
{
|
||
if (first)
|
||
{
|
||
printf_filtered ("\nNon-debugging symbols:\n");
|
||
first = 0;
|
||
}
|
||
print_msymbol_info (p->msymbol);
|
||
}
|
||
else
|
||
{
|
||
print_symbol_info (kind,
|
||
p->symtab,
|
||
p->symbol,
|
||
p->block,
|
||
last_filename);
|
||
last_filename = p->symtab->filename;
|
||
}
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
static void
|
||
variables_info (char *regexp, int from_tty)
|
||
{
|
||
symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
|
||
}
|
||
|
||
static void
|
||
functions_info (char *regexp, int from_tty)
|
||
{
|
||
symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
types_info (char *regexp, int from_tty)
|
||
{
|
||
symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
|
||
}
|
||
|
||
/* Breakpoint all functions matching regular expression. */
|
||
|
||
void
|
||
rbreak_command_wrapper (char *regexp, int from_tty)
|
||
{
|
||
rbreak_command (regexp, from_tty);
|
||
}
|
||
|
||
static void
|
||
rbreak_command (char *regexp, int from_tty)
|
||
{
|
||
struct symbol_search *ss;
|
||
struct symbol_search *p;
|
||
struct cleanup *old_chain;
|
||
|
||
search_symbols (regexp, FUNCTIONS_DOMAIN, 0, (char **) NULL, &ss);
|
||
old_chain = make_cleanup_free_search_symbols (ss);
|
||
|
||
for (p = ss; p != NULL; p = p->next)
|
||
{
|
||
if (p->msymbol == NULL)
|
||
{
|
||
char *string = alloca (strlen (p->symtab->filename)
|
||
+ strlen (SYMBOL_LINKAGE_NAME (p->symbol))
|
||
+ 4);
|
||
strcpy (string, p->symtab->filename);
|
||
strcat (string, ":'");
|
||
strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
|
||
strcat (string, "'");
|
||
break_command (string, from_tty);
|
||
print_symbol_info (FUNCTIONS_DOMAIN,
|
||
p->symtab,
|
||
p->symbol,
|
||
p->block,
|
||
p->symtab->filename);
|
||
}
|
||
else
|
||
{
|
||
char *string = alloca (strlen (SYMBOL_LINKAGE_NAME (p->msymbol))
|
||
+ 3);
|
||
strcpy (string, "'");
|
||
strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
|
||
strcat (string, "'");
|
||
|
||
break_command (string, from_tty);
|
||
printf_filtered ("<function, no debug info> %s;\n",
|
||
SYMBOL_PRINT_NAME (p->msymbol));
|
||
}
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
|
||
/* Helper routine for make_symbol_completion_list. */
|
||
|
||
static int return_val_size;
|
||
static int return_val_index;
|
||
static char **return_val;
|
||
|
||
#define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
|
||
completion_list_add_name \
|
||
(SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
|
||
|
||
/* Test to see if the symbol specified by SYMNAME (which is already
|
||
demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
|
||
characters. If so, add it to the current completion list. */
|
||
|
||
static void
|
||
completion_list_add_name (char *symname, char *sym_text, int sym_text_len,
|
||
char *text, char *word)
|
||
{
|
||
int newsize;
|
||
int i;
|
||
|
||
/* clip symbols that cannot match */
|
||
|
||
if (strncmp (symname, sym_text, sym_text_len) != 0)
|
||
{
|
||
return;
|
||
}
|
||
|
||
/* We have a match for a completion, so add SYMNAME to the current list
|
||
of matches. Note that the name is moved to freshly malloc'd space. */
|
||
|
||
{
|
||
char *new;
|
||
if (word == sym_text)
|
||
{
|
||
new = xmalloc (strlen (symname) + 5);
|
||
strcpy (new, symname);
|
||
}
|
||
else if (word > sym_text)
|
||
{
|
||
/* Return some portion of symname. */
|
||
new = xmalloc (strlen (symname) + 5);
|
||
strcpy (new, symname + (word - sym_text));
|
||
}
|
||
else
|
||
{
|
||
/* Return some of SYM_TEXT plus symname. */
|
||
new = xmalloc (strlen (symname) + (sym_text - word) + 5);
|
||
strncpy (new, word, sym_text - word);
|
||
new[sym_text - word] = '\0';
|
||
strcat (new, symname);
|
||
}
|
||
|
||
if (return_val_index + 3 > return_val_size)
|
||
{
|
||
newsize = (return_val_size *= 2) * sizeof (char *);
|
||
return_val = (char **) xrealloc ((char *) return_val, newsize);
|
||
}
|
||
return_val[return_val_index++] = new;
|
||
return_val[return_val_index] = NULL;
|
||
}
|
||
}
|
||
|
||
/* ObjC: In case we are completing on a selector, look as the msymbol
|
||
again and feed all the selectors into the mill. */
|
||
|
||
static void
|
||
completion_list_objc_symbol (struct minimal_symbol *msymbol, char *sym_text,
|
||
int sym_text_len, char *text, char *word)
|
||
{
|
||
static char *tmp = NULL;
|
||
static unsigned int tmplen = 0;
|
||
|
||
char *method, *category, *selector;
|
||
char *tmp2 = NULL;
|
||
|
||
method = SYMBOL_NATURAL_NAME (msymbol);
|
||
|
||
/* Is it a method? */
|
||
if ((method[0] != '-') && (method[0] != '+'))
|
||
return;
|
||
|
||
if (sym_text[0] == '[')
|
||
/* Complete on shortened method method. */
|
||
completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
|
||
|
||
while ((strlen (method) + 1) >= tmplen)
|
||
{
|
||
if (tmplen == 0)
|
||
tmplen = 1024;
|
||
else
|
||
tmplen *= 2;
|
||
tmp = xrealloc (tmp, tmplen);
|
||
}
|
||
selector = strchr (method, ' ');
|
||
if (selector != NULL)
|
||
selector++;
|
||
|
||
category = strchr (method, '(');
|
||
|
||
if ((category != NULL) && (selector != NULL))
|
||
{
|
||
memcpy (tmp, method, (category - method));
|
||
tmp[category - method] = ' ';
|
||
memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
|
||
completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
|
||
if (sym_text[0] == '[')
|
||
completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
|
||
}
|
||
|
||
if (selector != NULL)
|
||
{
|
||
/* Complete on selector only. */
|
||
strcpy (tmp, selector);
|
||
tmp2 = strchr (tmp, ']');
|
||
if (tmp2 != NULL)
|
||
*tmp2 = '\0';
|
||
|
||
completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
|
||
}
|
||
}
|
||
|
||
/* Break the non-quoted text based on the characters which are in
|
||
symbols. FIXME: This should probably be language-specific. */
|
||
|
||
static char *
|
||
language_search_unquoted_string (char *text, char *p)
|
||
{
|
||
for (; p > text; --p)
|
||
{
|
||
if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
|
||
continue;
|
||
else
|
||
{
|
||
if ((current_language->la_language == language_objc))
|
||
{
|
||
if (p[-1] == ':') /* might be part of a method name */
|
||
continue;
|
||
else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
|
||
p -= 2; /* beginning of a method name */
|
||
else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
|
||
{ /* might be part of a method name */
|
||
char *t = p;
|
||
|
||
/* Seeing a ' ' or a '(' is not conclusive evidence
|
||
that we are in the middle of a method name. However,
|
||
finding "-[" or "+[" should be pretty un-ambiguous.
|
||
Unfortunately we have to find it now to decide. */
|
||
|
||
while (t > text)
|
||
if (isalnum (t[-1]) || t[-1] == '_' ||
|
||
t[-1] == ' ' || t[-1] == ':' ||
|
||
t[-1] == '(' || t[-1] == ')')
|
||
--t;
|
||
else
|
||
break;
|
||
|
||
if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
|
||
p = t - 2; /* method name detected */
|
||
/* else we leave with p unchanged */
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
return p;
|
||
}
|
||
|
||
static void
|
||
completion_list_add_fields (struct symbol *sym, char *sym_text,
|
||
int sym_text_len, char *text, char *word)
|
||
{
|
||
if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
|
||
{
|
||
struct type *t = SYMBOL_TYPE (sym);
|
||
enum type_code c = TYPE_CODE (t);
|
||
int j;
|
||
|
||
if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
|
||
for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
|
||
if (TYPE_FIELD_NAME (t, j))
|
||
completion_list_add_name (TYPE_FIELD_NAME (t, j),
|
||
sym_text, sym_text_len, text, word);
|
||
}
|
||
}
|
||
|
||
/* Type of the user_data argument passed to add_macro_name. The
|
||
contents are simply whatever is needed by
|
||
completion_list_add_name. */
|
||
struct add_macro_name_data
|
||
{
|
||
char *sym_text;
|
||
int sym_text_len;
|
||
char *text;
|
||
char *word;
|
||
};
|
||
|
||
/* A callback used with macro_for_each and macro_for_each_in_scope.
|
||
This adds a macro's name to the current completion list. */
|
||
static void
|
||
add_macro_name (const char *name, const struct macro_definition *ignore,
|
||
void *user_data)
|
||
{
|
||
struct add_macro_name_data *datum = (struct add_macro_name_data *) user_data;
|
||
completion_list_add_name ((char *) name,
|
||
datum->sym_text, datum->sym_text_len,
|
||
datum->text, datum->word);
|
||
}
|
||
|
||
char **
|
||
default_make_symbol_completion_list (char *text, char *word)
|
||
{
|
||
/* Problem: All of the symbols have to be copied because readline
|
||
frees them. I'm not going to worry about this; hopefully there
|
||
won't be that many. */
|
||
|
||
struct symbol *sym;
|
||
struct symtab *s;
|
||
struct partial_symtab *ps;
|
||
struct minimal_symbol *msymbol;
|
||
struct objfile *objfile;
|
||
struct block *b;
|
||
const struct block *surrounding_static_block, *surrounding_global_block;
|
||
struct dict_iterator iter;
|
||
struct partial_symbol **psym;
|
||
/* The symbol we are completing on. Points in same buffer as text. */
|
||
char *sym_text;
|
||
/* Length of sym_text. */
|
||
int sym_text_len;
|
||
|
||
/* Now look for the symbol we are supposed to complete on. */
|
||
{
|
||
char *p;
|
||
char quote_found;
|
||
char *quote_pos = NULL;
|
||
|
||
/* First see if this is a quoted string. */
|
||
quote_found = '\0';
|
||
for (p = text; *p != '\0'; ++p)
|
||
{
|
||
if (quote_found != '\0')
|
||
{
|
||
if (*p == quote_found)
|
||
/* Found close quote. */
|
||
quote_found = '\0';
|
||
else if (*p == '\\' && p[1] == quote_found)
|
||
/* A backslash followed by the quote character
|
||
doesn't end the string. */
|
||
++p;
|
||
}
|
||
else if (*p == '\'' || *p == '"')
|
||
{
|
||
quote_found = *p;
|
||
quote_pos = p;
|
||
}
|
||
}
|
||
if (quote_found == '\'')
|
||
/* A string within single quotes can be a symbol, so complete on it. */
|
||
sym_text = quote_pos + 1;
|
||
else if (quote_found == '"')
|
||
/* A double-quoted string is never a symbol, nor does it make sense
|
||
to complete it any other way. */
|
||
{
|
||
return_val = (char **) xmalloc (sizeof (char *));
|
||
return_val[0] = NULL;
|
||
return return_val;
|
||
}
|
||
else
|
||
{
|
||
/* It is not a quoted string. Break it based on the characters
|
||
which are in symbols. */
|
||
while (p > text)
|
||
{
|
||
if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
|
||
|| p[-1] == ':')
|
||
--p;
|
||
else
|
||
break;
|
||
}
|
||
sym_text = p;
|
||
}
|
||
}
|
||
|
||
sym_text_len = strlen (sym_text);
|
||
|
||
return_val_size = 100;
|
||
return_val_index = 0;
|
||
return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
|
||
return_val[0] = NULL;
|
||
|
||
/* Look through the partial symtabs for all symbols which begin
|
||
by matching SYM_TEXT. Add each one that you find to the list. */
|
||
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
/* If the psymtab's been read in we'll get it when we search
|
||
through the blockvector. */
|
||
if (ps->readin)
|
||
continue;
|
||
|
||
for (psym = objfile->global_psymbols.list + ps->globals_offset;
|
||
psym < (objfile->global_psymbols.list + ps->globals_offset
|
||
+ ps->n_global_syms);
|
||
psym++)
|
||
{
|
||
/* If interrupted, then quit. */
|
||
QUIT;
|
||
COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
|
||
}
|
||
|
||
for (psym = objfile->static_psymbols.list + ps->statics_offset;
|
||
psym < (objfile->static_psymbols.list + ps->statics_offset
|
||
+ ps->n_static_syms);
|
||
psym++)
|
||
{
|
||
QUIT;
|
||
COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
|
||
}
|
||
}
|
||
|
||
/* At this point scan through the misc symbol vectors and add each
|
||
symbol you find to the list. Eventually we want to ignore
|
||
anything that isn't a text symbol (everything else will be
|
||
handled by the psymtab code above). */
|
||
|
||
ALL_MSYMBOLS (objfile, msymbol)
|
||
{
|
||
QUIT;
|
||
COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
|
||
|
||
completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
|
||
}
|
||
|
||
/* Search upwards from currently selected frame (so that we can
|
||
complete on local vars). Also catch fields of types defined in
|
||
this places which match our text string. Only complete on types
|
||
visible from current context. */
|
||
|
||
b = get_selected_block (0);
|
||
surrounding_static_block = block_static_block (b);
|
||
surrounding_global_block = block_global_block (b);
|
||
if (surrounding_static_block != NULL)
|
||
while (b != surrounding_static_block)
|
||
{
|
||
QUIT;
|
||
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
|
||
word);
|
||
completion_list_add_fields (sym, sym_text, sym_text_len, text,
|
||
word);
|
||
}
|
||
|
||
/* Stop when we encounter an enclosing function. Do not stop for
|
||
non-inlined functions - the locals of the enclosing function
|
||
are in scope for a nested function. */
|
||
if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
|
||
break;
|
||
b = BLOCK_SUPERBLOCK (b);
|
||
}
|
||
|
||
/* Add fields from the file's types; symbols will be added below. */
|
||
|
||
if (surrounding_static_block != NULL)
|
||
ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
|
||
completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
|
||
|
||
if (surrounding_global_block != NULL)
|
||
ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
|
||
completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
|
||
|
||
/* Go through the symtabs and check the externs and statics for
|
||
symbols which match. */
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
QUIT;
|
||
b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
|
||
}
|
||
}
|
||
|
||
ALL_PRIMARY_SYMTABS (objfile, s)
|
||
{
|
||
QUIT;
|
||
b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
|
||
}
|
||
}
|
||
|
||
if (current_language->la_macro_expansion == macro_expansion_c)
|
||
{
|
||
struct macro_scope *scope;
|
||
struct add_macro_name_data datum;
|
||
|
||
datum.sym_text = sym_text;
|
||
datum.sym_text_len = sym_text_len;
|
||
datum.text = text;
|
||
datum.word = word;
|
||
|
||
/* Add any macros visible in the default scope. Note that this
|
||
may yield the occasional wrong result, because an expression
|
||
might be evaluated in a scope other than the default. For
|
||
example, if the user types "break file:line if <TAB>", the
|
||
resulting expression will be evaluated at "file:line" -- but
|
||
at there does not seem to be a way to detect this at
|
||
completion time. */
|
||
scope = default_macro_scope ();
|
||
if (scope)
|
||
{
|
||
macro_for_each_in_scope (scope->file, scope->line,
|
||
add_macro_name, &datum);
|
||
xfree (scope);
|
||
}
|
||
|
||
/* User-defined macros are always visible. */
|
||
macro_for_each (macro_user_macros, add_macro_name, &datum);
|
||
}
|
||
|
||
return (return_val);
|
||
}
|
||
|
||
/* Return a NULL terminated array of all symbols (regardless of class)
|
||
which begin by matching TEXT. If the answer is no symbols, then
|
||
the return value is an array which contains only a NULL pointer. */
|
||
|
||
char **
|
||
make_symbol_completion_list (char *text, char *word)
|
||
{
|
||
return current_language->la_make_symbol_completion_list (text, word);
|
||
}
|
||
|
||
/* Like make_symbol_completion_list, but suitable for use as a
|
||
completion function. */
|
||
|
||
char **
|
||
make_symbol_completion_list_fn (struct cmd_list_element *ignore,
|
||
char *text, char *word)
|
||
{
|
||
return make_symbol_completion_list (text, word);
|
||
}
|
||
|
||
/* Like make_symbol_completion_list, but returns a list of symbols
|
||
defined in a source file FILE. */
|
||
|
||
char **
|
||
make_file_symbol_completion_list (char *text, char *word, char *srcfile)
|
||
{
|
||
struct symbol *sym;
|
||
struct symtab *s;
|
||
struct block *b;
|
||
struct dict_iterator iter;
|
||
/* The symbol we are completing on. Points in same buffer as text. */
|
||
char *sym_text;
|
||
/* Length of sym_text. */
|
||
int sym_text_len;
|
||
|
||
/* Now look for the symbol we are supposed to complete on.
|
||
FIXME: This should be language-specific. */
|
||
{
|
||
char *p;
|
||
char quote_found;
|
||
char *quote_pos = NULL;
|
||
|
||
/* First see if this is a quoted string. */
|
||
quote_found = '\0';
|
||
for (p = text; *p != '\0'; ++p)
|
||
{
|
||
if (quote_found != '\0')
|
||
{
|
||
if (*p == quote_found)
|
||
/* Found close quote. */
|
||
quote_found = '\0';
|
||
else if (*p == '\\' && p[1] == quote_found)
|
||
/* A backslash followed by the quote character
|
||
doesn't end the string. */
|
||
++p;
|
||
}
|
||
else if (*p == '\'' || *p == '"')
|
||
{
|
||
quote_found = *p;
|
||
quote_pos = p;
|
||
}
|
||
}
|
||
if (quote_found == '\'')
|
||
/* A string within single quotes can be a symbol, so complete on it. */
|
||
sym_text = quote_pos + 1;
|
||
else if (quote_found == '"')
|
||
/* A double-quoted string is never a symbol, nor does it make sense
|
||
to complete it any other way. */
|
||
{
|
||
return_val = (char **) xmalloc (sizeof (char *));
|
||
return_val[0] = NULL;
|
||
return return_val;
|
||
}
|
||
else
|
||
{
|
||
/* Not a quoted string. */
|
||
sym_text = language_search_unquoted_string (text, p);
|
||
}
|
||
}
|
||
|
||
sym_text_len = strlen (sym_text);
|
||
|
||
return_val_size = 10;
|
||
return_val_index = 0;
|
||
return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
|
||
return_val[0] = NULL;
|
||
|
||
/* Find the symtab for SRCFILE (this loads it if it was not yet read
|
||
in). */
|
||
s = lookup_symtab (srcfile);
|
||
if (s == NULL)
|
||
{
|
||
/* Maybe they typed the file with leading directories, while the
|
||
symbol tables record only its basename. */
|
||
const char *tail = lbasename (srcfile);
|
||
|
||
if (tail > srcfile)
|
||
s = lookup_symtab (tail);
|
||
}
|
||
|
||
/* If we have no symtab for that file, return an empty list. */
|
||
if (s == NULL)
|
||
return (return_val);
|
||
|
||
/* Go through this symtab and check the externs and statics for
|
||
symbols which match. */
|
||
|
||
b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
|
||
}
|
||
|
||
b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
|
||
}
|
||
|
||
return (return_val);
|
||
}
|
||
|
||
/* A helper function for make_source_files_completion_list. It adds
|
||
another file name to a list of possible completions, growing the
|
||
list as necessary. */
|
||
|
||
static void
|
||
add_filename_to_list (const char *fname, char *text, char *word,
|
||
char ***list, int *list_used, int *list_alloced)
|
||
{
|
||
char *new;
|
||
size_t fnlen = strlen (fname);
|
||
|
||
if (*list_used + 1 >= *list_alloced)
|
||
{
|
||
*list_alloced *= 2;
|
||
*list = (char **) xrealloc ((char *) *list,
|
||
*list_alloced * sizeof (char *));
|
||
}
|
||
|
||
if (word == text)
|
||
{
|
||
/* Return exactly fname. */
|
||
new = xmalloc (fnlen + 5);
|
||
strcpy (new, fname);
|
||
}
|
||
else if (word > text)
|
||
{
|
||
/* Return some portion of fname. */
|
||
new = xmalloc (fnlen + 5);
|
||
strcpy (new, fname + (word - text));
|
||
}
|
||
else
|
||
{
|
||
/* Return some of TEXT plus fname. */
|
||
new = xmalloc (fnlen + (text - word) + 5);
|
||
strncpy (new, word, text - word);
|
||
new[text - word] = '\0';
|
||
strcat (new, fname);
|
||
}
|
||
(*list)[*list_used] = new;
|
||
(*list)[++*list_used] = NULL;
|
||
}
|
||
|
||
static int
|
||
not_interesting_fname (const char *fname)
|
||
{
|
||
static const char *illegal_aliens[] = {
|
||
"_globals_", /* inserted by coff_symtab_read */
|
||
NULL
|
||
};
|
||
int i;
|
||
|
||
for (i = 0; illegal_aliens[i]; i++)
|
||
{
|
||
if (strcmp (fname, illegal_aliens[i]) == 0)
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Return a NULL terminated array of all source files whose names
|
||
begin with matching TEXT. The file names are looked up in the
|
||
symbol tables of this program. If the answer is no matchess, then
|
||
the return value is an array which contains only a NULL pointer. */
|
||
|
||
char **
|
||
make_source_files_completion_list (char *text, char *word)
|
||
{
|
||
struct symtab *s;
|
||
struct partial_symtab *ps;
|
||
struct objfile *objfile;
|
||
int first = 1;
|
||
int list_alloced = 1;
|
||
int list_used = 0;
|
||
size_t text_len = strlen (text);
|
||
char **list = (char **) xmalloc (list_alloced * sizeof (char *));
|
||
const char *base_name;
|
||
|
||
list[0] = NULL;
|
||
|
||
if (!have_full_symbols () && !have_partial_symbols ())
|
||
return list;
|
||
|
||
ALL_SYMTABS (objfile, s)
|
||
{
|
||
if (not_interesting_fname (s->filename))
|
||
continue;
|
||
if (!filename_seen (s->filename, 1, &first)
|
||
#if HAVE_DOS_BASED_FILE_SYSTEM
|
||
&& strncasecmp (s->filename, text, text_len) == 0
|
||
#else
|
||
&& strncmp (s->filename, text, text_len) == 0
|
||
#endif
|
||
)
|
||
{
|
||
/* This file matches for a completion; add it to the current
|
||
list of matches. */
|
||
add_filename_to_list (s->filename, text, word,
|
||
&list, &list_used, &list_alloced);
|
||
}
|
||
else
|
||
{
|
||
/* NOTE: We allow the user to type a base name when the
|
||
debug info records leading directories, but not the other
|
||
way around. This is what subroutines of breakpoint
|
||
command do when they parse file names. */
|
||
base_name = lbasename (s->filename);
|
||
if (base_name != s->filename
|
||
&& !filename_seen (base_name, 1, &first)
|
||
#if HAVE_DOS_BASED_FILE_SYSTEM
|
||
&& strncasecmp (base_name, text, text_len) == 0
|
||
#else
|
||
&& strncmp (base_name, text, text_len) == 0
|
||
#endif
|
||
)
|
||
add_filename_to_list (base_name, text, word,
|
||
&list, &list_used, &list_alloced);
|
||
}
|
||
}
|
||
|
||
ALL_PSYMTABS (objfile, ps)
|
||
{
|
||
if (not_interesting_fname (ps->filename))
|
||
continue;
|
||
if (!ps->readin)
|
||
{
|
||
if (!filename_seen (ps->filename, 1, &first)
|
||
#if HAVE_DOS_BASED_FILE_SYSTEM
|
||
&& strncasecmp (ps->filename, text, text_len) == 0
|
||
#else
|
||
&& strncmp (ps->filename, text, text_len) == 0
|
||
#endif
|
||
)
|
||
{
|
||
/* This file matches for a completion; add it to the
|
||
current list of matches. */
|
||
add_filename_to_list (ps->filename, text, word,
|
||
&list, &list_used, &list_alloced);
|
||
|
||
}
|
||
else
|
||
{
|
||
base_name = lbasename (ps->filename);
|
||
if (base_name != ps->filename
|
||
&& !filename_seen (base_name, 1, &first)
|
||
#if HAVE_DOS_BASED_FILE_SYSTEM
|
||
&& strncasecmp (base_name, text, text_len) == 0
|
||
#else
|
||
&& strncmp (base_name, text, text_len) == 0
|
||
#endif
|
||
)
|
||
add_filename_to_list (base_name, text, word,
|
||
&list, &list_used, &list_alloced);
|
||
}
|
||
}
|
||
}
|
||
|
||
return list;
|
||
}
|
||
|
||
/* Determine if PC is in the prologue of a function. The prologue is the area
|
||
between the first instruction of a function, and the first executable line.
|
||
Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
|
||
|
||
If non-zero, func_start is where we think the prologue starts, possibly
|
||
by previous examination of symbol table information.
|
||
*/
|
||
|
||
int
|
||
in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
|
||
{
|
||
struct symtab_and_line sal;
|
||
CORE_ADDR func_addr, func_end;
|
||
|
||
/* We have several sources of information we can consult to figure
|
||
this out.
|
||
- Compilers usually emit line number info that marks the prologue
|
||
as its own "source line". So the ending address of that "line"
|
||
is the end of the prologue. If available, this is the most
|
||
reliable method.
|
||
- The minimal symbols and partial symbols, which can usually tell
|
||
us the starting and ending addresses of a function.
|
||
- If we know the function's start address, we can call the
|
||
architecture-defined gdbarch_skip_prologue function to analyze the
|
||
instruction stream and guess where the prologue ends.
|
||
- Our `func_start' argument; if non-zero, this is the caller's
|
||
best guess as to the function's entry point. At the time of
|
||
this writing, handle_inferior_event doesn't get this right, so
|
||
it should be our last resort. */
|
||
|
||
/* Consult the partial symbol table, to find which function
|
||
the PC is in. */
|
||
if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
||
{
|
||
CORE_ADDR prologue_end;
|
||
|
||
/* We don't even have minsym information, so fall back to using
|
||
func_start, if given. */
|
||
if (! func_start)
|
||
return 1; /* We *might* be in a prologue. */
|
||
|
||
prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
|
||
|
||
return func_start <= pc && pc < prologue_end;
|
||
}
|
||
|
||
/* If we have line number information for the function, that's
|
||
usually pretty reliable. */
|
||
sal = find_pc_line (func_addr, 0);
|
||
|
||
/* Now sal describes the source line at the function's entry point,
|
||
which (by convention) is the prologue. The end of that "line",
|
||
sal.end, is the end of the prologue.
|
||
|
||
Note that, for functions whose source code is all on a single
|
||
line, the line number information doesn't always end up this way.
|
||
So we must verify that our purported end-of-prologue address is
|
||
*within* the function, not at its start or end. */
|
||
if (sal.line == 0
|
||
|| sal.end <= func_addr
|
||
|| func_end <= sal.end)
|
||
{
|
||
/* We don't have any good line number info, so use the minsym
|
||
information, together with the architecture-specific prologue
|
||
scanning code. */
|
||
CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
|
||
|
||
return func_addr <= pc && pc < prologue_end;
|
||
}
|
||
|
||
/* We have line number info, and it looks good. */
|
||
return func_addr <= pc && pc < sal.end;
|
||
}
|
||
|
||
/* Given PC at the function's start address, attempt to find the
|
||
prologue end using SAL information. Return zero if the skip fails.
|
||
|
||
A non-optimized prologue traditionally has one SAL for the function
|
||
and a second for the function body. A single line function has
|
||
them both pointing at the same line.
|
||
|
||
An optimized prologue is similar but the prologue may contain
|
||
instructions (SALs) from the instruction body. Need to skip those
|
||
while not getting into the function body.
|
||
|
||
The functions end point and an increasing SAL line are used as
|
||
indicators of the prologue's endpoint.
|
||
|
||
This code is based on the function refine_prologue_limit (versions
|
||
found in both ia64 and ppc). */
|
||
|
||
CORE_ADDR
|
||
skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
|
||
{
|
||
struct symtab_and_line prologue_sal;
|
||
CORE_ADDR start_pc;
|
||
CORE_ADDR end_pc;
|
||
struct block *bl;
|
||
|
||
/* Get an initial range for the function. */
|
||
find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
|
||
start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
|
||
|
||
prologue_sal = find_pc_line (start_pc, 0);
|
||
if (prologue_sal.line != 0)
|
||
{
|
||
/* For langauges other than assembly, treat two consecutive line
|
||
entries at the same address as a zero-instruction prologue.
|
||
The GNU assembler emits separate line notes for each instruction
|
||
in a multi-instruction macro, but compilers generally will not
|
||
do this. */
|
||
if (prologue_sal.symtab->language != language_asm)
|
||
{
|
||
struct linetable *linetable = LINETABLE (prologue_sal.symtab);
|
||
int exact;
|
||
int idx = 0;
|
||
|
||
/* Skip any earlier lines, and any end-of-sequence marker
|
||
from a previous function. */
|
||
while (linetable->item[idx].pc != prologue_sal.pc
|
||
|| linetable->item[idx].line == 0)
|
||
idx++;
|
||
|
||
if (idx+1 < linetable->nitems
|
||
&& linetable->item[idx+1].line != 0
|
||
&& linetable->item[idx+1].pc == start_pc)
|
||
return start_pc;
|
||
}
|
||
|
||
/* If there is only one sal that covers the entire function,
|
||
then it is probably a single line function, like
|
||
"foo(){}". */
|
||
if (prologue_sal.end >= end_pc)
|
||
return 0;
|
||
|
||
while (prologue_sal.end < end_pc)
|
||
{
|
||
struct symtab_and_line sal;
|
||
|
||
sal = find_pc_line (prologue_sal.end, 0);
|
||
if (sal.line == 0)
|
||
break;
|
||
/* Assume that a consecutive SAL for the same (or larger)
|
||
line mark the prologue -> body transition. */
|
||
if (sal.line >= prologue_sal.line)
|
||
break;
|
||
|
||
/* The line number is smaller. Check that it's from the
|
||
same function, not something inlined. If it's inlined,
|
||
then there is no point comparing the line numbers. */
|
||
bl = block_for_pc (prologue_sal.end);
|
||
while (bl)
|
||
{
|
||
if (block_inlined_p (bl))
|
||
break;
|
||
if (BLOCK_FUNCTION (bl))
|
||
{
|
||
bl = NULL;
|
||
break;
|
||
}
|
||
bl = BLOCK_SUPERBLOCK (bl);
|
||
}
|
||
if (bl != NULL)
|
||
break;
|
||
|
||
/* The case in which compiler's optimizer/scheduler has
|
||
moved instructions into the prologue. We look ahead in
|
||
the function looking for address ranges whose
|
||
corresponding line number is less the first one that we
|
||
found for the function. This is more conservative then
|
||
refine_prologue_limit which scans a large number of SALs
|
||
looking for any in the prologue */
|
||
prologue_sal = sal;
|
||
}
|
||
}
|
||
|
||
if (prologue_sal.end < end_pc)
|
||
/* Return the end of this line, or zero if we could not find a
|
||
line. */
|
||
return prologue_sal.end;
|
||
else
|
||
/* Don't return END_PC, which is past the end of the function. */
|
||
return prologue_sal.pc;
|
||
}
|
||
|
||
struct symtabs_and_lines
|
||
decode_line_spec (char *string, int funfirstline)
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line cursal;
|
||
|
||
if (string == 0)
|
||
error (_("Empty line specification."));
|
||
|
||
/* We use whatever is set as the current source line. We do not try
|
||
and get a default or it will recursively call us! */
|
||
cursal = get_current_source_symtab_and_line ();
|
||
|
||
sals = decode_line_1 (&string, funfirstline,
|
||
cursal.symtab, cursal.line,
|
||
(char ***) NULL, NULL);
|
||
|
||
if (*string)
|
||
error (_("Junk at end of line specification: %s"), string);
|
||
return sals;
|
||
}
|
||
|
||
/* Track MAIN */
|
||
static char *name_of_main;
|
||
|
||
void
|
||
set_main_name (const char *name)
|
||
{
|
||
if (name_of_main != NULL)
|
||
{
|
||
xfree (name_of_main);
|
||
name_of_main = NULL;
|
||
}
|
||
if (name != NULL)
|
||
{
|
||
name_of_main = xstrdup (name);
|
||
}
|
||
}
|
||
|
||
/* Deduce the name of the main procedure, and set NAME_OF_MAIN
|
||
accordingly. */
|
||
|
||
static void
|
||
find_main_name (void)
|
||
{
|
||
const char *new_main_name;
|
||
|
||
/* Try to see if the main procedure is in Ada. */
|
||
/* FIXME: brobecker/2005-03-07: Another way of doing this would
|
||
be to add a new method in the language vector, and call this
|
||
method for each language until one of them returns a non-empty
|
||
name. This would allow us to remove this hard-coded call to
|
||
an Ada function. It is not clear that this is a better approach
|
||
at this point, because all methods need to be written in a way
|
||
such that false positives never be returned. For instance, it is
|
||
important that a method does not return a wrong name for the main
|
||
procedure if the main procedure is actually written in a different
|
||
language. It is easy to guaranty this with Ada, since we use a
|
||
special symbol generated only when the main in Ada to find the name
|
||
of the main procedure. It is difficult however to see how this can
|
||
be guarantied for languages such as C, for instance. This suggests
|
||
that order of call for these methods becomes important, which means
|
||
a more complicated approach. */
|
||
new_main_name = ada_main_name ();
|
||
if (new_main_name != NULL)
|
||
{
|
||
set_main_name (new_main_name);
|
||
return;
|
||
}
|
||
|
||
new_main_name = pascal_main_name ();
|
||
if (new_main_name != NULL)
|
||
{
|
||
set_main_name (new_main_name);
|
||
return;
|
||
}
|
||
|
||
/* The languages above didn't identify the name of the main procedure.
|
||
Fallback to "main". */
|
||
set_main_name ("main");
|
||
}
|
||
|
||
char *
|
||
main_name (void)
|
||
{
|
||
if (name_of_main == NULL)
|
||
find_main_name ();
|
||
|
||
return name_of_main;
|
||
}
|
||
|
||
/* Handle ``executable_changed'' events for the symtab module. */
|
||
|
||
static void
|
||
symtab_observer_executable_changed (void)
|
||
{
|
||
/* NAME_OF_MAIN may no longer be the same, so reset it for now. */
|
||
set_main_name (NULL);
|
||
}
|
||
|
||
/* Helper to expand_line_sal below. Appends new sal to SAL,
|
||
initializing it from SYMTAB, LINENO and PC. */
|
||
static void
|
||
append_expanded_sal (struct symtabs_and_lines *sal,
|
||
struct symtab *symtab,
|
||
int lineno, CORE_ADDR pc)
|
||
{
|
||
sal->sals = xrealloc (sal->sals,
|
||
sizeof (sal->sals[0])
|
||
* (sal->nelts + 1));
|
||
init_sal (sal->sals + sal->nelts);
|
||
sal->sals[sal->nelts].symtab = symtab;
|
||
sal->sals[sal->nelts].section = NULL;
|
||
sal->sals[sal->nelts].end = 0;
|
||
sal->sals[sal->nelts].line = lineno;
|
||
sal->sals[sal->nelts].pc = pc;
|
||
++sal->nelts;
|
||
}
|
||
|
||
/* Helper to expand_line_sal below. Search in the symtabs for any
|
||
linetable entry that exactly matches FILENAME and LINENO and append
|
||
them to RET. If there is at least one match, return 1; otherwise,
|
||
return 0, and return the best choice in BEST_ITEM and BEST_SYMTAB. */
|
||
|
||
static int
|
||
append_exact_match_to_sals (char *filename, int lineno,
|
||
struct symtabs_and_lines *ret,
|
||
struct linetable_entry **best_item,
|
||
struct symtab **best_symtab)
|
||
{
|
||
struct objfile *objfile;
|
||
struct symtab *symtab;
|
||
int exact = 0;
|
||
int j;
|
||
*best_item = 0;
|
||
*best_symtab = 0;
|
||
|
||
ALL_SYMTABS (objfile, symtab)
|
||
{
|
||
if (strcmp (filename, symtab->filename) == 0)
|
||
{
|
||
struct linetable *l;
|
||
int len;
|
||
l = LINETABLE (symtab);
|
||
if (!l)
|
||
continue;
|
||
len = l->nitems;
|
||
|
||
for (j = 0; j < len; j++)
|
||
{
|
||
struct linetable_entry *item = &(l->item[j]);
|
||
|
||
if (item->line == lineno)
|
||
{
|
||
exact = 1;
|
||
append_expanded_sal (ret, symtab, lineno, item->pc);
|
||
}
|
||
else if (!exact && item->line > lineno
|
||
&& (*best_item == NULL
|
||
|| item->line < (*best_item)->line))
|
||
{
|
||
*best_item = item;
|
||
*best_symtab = symtab;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return exact;
|
||
}
|
||
|
||
/* Compute a set of all sals in
|
||
the entire program that correspond to same file
|
||
and line as SAL and return those. If there
|
||
are several sals that belong to the same block,
|
||
only one sal for the block is included in results. */
|
||
|
||
struct symtabs_and_lines
|
||
expand_line_sal (struct symtab_and_line sal)
|
||
{
|
||
struct symtabs_and_lines ret, this_line;
|
||
int i, j;
|
||
struct objfile *objfile;
|
||
struct partial_symtab *psymtab;
|
||
struct symtab *symtab;
|
||
int lineno;
|
||
int deleted = 0;
|
||
struct block **blocks = NULL;
|
||
int *filter;
|
||
|
||
ret.nelts = 0;
|
||
ret.sals = NULL;
|
||
|
||
if (sal.symtab == NULL || sal.line == 0 || sal.pc != 0)
|
||
{
|
||
ret.sals = xmalloc (sizeof (struct symtab_and_line));
|
||
ret.sals[0] = sal;
|
||
ret.nelts = 1;
|
||
return ret;
|
||
}
|
||
else
|
||
{
|
||
struct linetable_entry *best_item = 0;
|
||
struct symtab *best_symtab = 0;
|
||
int exact = 0;
|
||
|
||
lineno = sal.line;
|
||
|
||
/* We need to find all symtabs for a file which name
|
||
is described by sal. We cannot just directly
|
||
iterate over symtabs, since a symtab might not be
|
||
yet created. We also cannot iterate over psymtabs,
|
||
calling PSYMTAB_TO_SYMTAB and working on that symtab,
|
||
since PSYMTAB_TO_SYMTAB will return NULL for psymtab
|
||
corresponding to an included file. Therefore, we do
|
||
first pass over psymtabs, reading in those with
|
||
the right name. Then, we iterate over symtabs, knowing
|
||
that all symtabs we're interested in are loaded. */
|
||
|
||
ALL_PSYMTABS (objfile, psymtab)
|
||
{
|
||
if (strcmp (sal.symtab->filename,
|
||
psymtab->filename) == 0)
|
||
PSYMTAB_TO_SYMTAB (psymtab);
|
||
}
|
||
|
||
/* Now search the symtab for exact matches and append them. If
|
||
none is found, append the best_item and all its exact
|
||
matches. */
|
||
exact = append_exact_match_to_sals (sal.symtab->filename, lineno,
|
||
&ret, &best_item, &best_symtab);
|
||
if (!exact && best_item)
|
||
append_exact_match_to_sals (best_symtab->filename, best_item->line,
|
||
&ret, &best_item, &best_symtab);
|
||
}
|
||
|
||
/* For optimized code, compiler can scatter one source line accross
|
||
disjoint ranges of PC values, even when no duplicate functions
|
||
or inline functions are involved. For example, 'for (;;)' inside
|
||
non-template non-inline non-ctor-or-dtor function can result
|
||
in two PC ranges. In this case, we don't want to set breakpoint
|
||
on first PC of each range. To filter such cases, we use containing
|
||
blocks -- for each PC found above we see if there are other PCs
|
||
that are in the same block. If yes, the other PCs are filtered out. */
|
||
|
||
filter = alloca (ret.nelts * sizeof (int));
|
||
blocks = alloca (ret.nelts * sizeof (struct block *));
|
||
for (i = 0; i < ret.nelts; ++i)
|
||
{
|
||
filter[i] = 1;
|
||
blocks[i] = block_for_pc (ret.sals[i].pc);
|
||
}
|
||
|
||
for (i = 0; i < ret.nelts; ++i)
|
||
if (blocks[i] != NULL)
|
||
for (j = i+1; j < ret.nelts; ++j)
|
||
if (blocks[j] == blocks[i])
|
||
{
|
||
filter[j] = 0;
|
||
++deleted;
|
||
break;
|
||
}
|
||
|
||
{
|
||
struct symtab_and_line *final =
|
||
xmalloc (sizeof (struct symtab_and_line) * (ret.nelts-deleted));
|
||
|
||
for (i = 0, j = 0; i < ret.nelts; ++i)
|
||
if (filter[i])
|
||
final[j++] = ret.sals[i];
|
||
|
||
ret.nelts -= deleted;
|
||
xfree (ret.sals);
|
||
ret.sals = final;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
|
||
void
|
||
_initialize_symtab (void)
|
||
{
|
||
add_info ("variables", variables_info, _("\
|
||
All global and static variable names, or those matching REGEXP."));
|
||
if (dbx_commands)
|
||
add_com ("whereis", class_info, variables_info, _("\
|
||
All global and static variable names, or those matching REGEXP."));
|
||
|
||
add_info ("functions", functions_info,
|
||
_("All function names, or those matching REGEXP."));
|
||
|
||
/* FIXME: This command has at least the following problems:
|
||
1. It prints builtin types (in a very strange and confusing fashion).
|
||
2. It doesn't print right, e.g. with
|
||
typedef struct foo *FOO
|
||
type_print prints "FOO" when we want to make it (in this situation)
|
||
print "struct foo *".
|
||
I also think "ptype" or "whatis" is more likely to be useful (but if
|
||
there is much disagreement "info types" can be fixed). */
|
||
add_info ("types", types_info,
|
||
_("All type names, or those matching REGEXP."));
|
||
|
||
add_info ("sources", sources_info,
|
||
_("Source files in the program."));
|
||
|
||
add_com ("rbreak", class_breakpoint, rbreak_command,
|
||
_("Set a breakpoint for all functions matching REGEXP."));
|
||
|
||
if (xdb_commands)
|
||
{
|
||
add_com ("lf", class_info, sources_info,
|
||
_("Source files in the program"));
|
||
add_com ("lg", class_info, variables_info, _("\
|
||
All global and static variable names, or those matching REGEXP."));
|
||
}
|
||
|
||
add_setshow_enum_cmd ("multiple-symbols", no_class,
|
||
multiple_symbols_modes, &multiple_symbols_mode,
|
||
_("\
|
||
Set the debugger behavior when more than one symbol are possible matches\n\
|
||
in an expression."), _("\
|
||
Show how the debugger handles ambiguities in expressions."), _("\
|
||
Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
|
||
NULL, NULL, &setlist, &showlist);
|
||
|
||
observer_attach_executable_changed (symtab_observer_executable_changed);
|
||
}
|