mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-05 02:47:05 +00:00
063190b6cb
by appropriate warning hook. (print_source_lines): Remove tui hacks, must be replaced by cli. (forward_search_command): Remove tui hacks, can be replaced by appropriate calls to identify_source_line when tui scrolls. (reverse_search_command): Likewise.
1721 lines
45 KiB
C
1721 lines
45 KiB
C
/* List lines of source files for GDB, the GNU debugger.
|
||
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
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1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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||
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This file is part of GDB.
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||
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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||
the Free Software Foundation; either version 2 of the License, or
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||
(at your option) any later version.
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||
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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
|
||
GNU General Public License for more details.
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||
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||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "expression.h"
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#include "language.h"
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#include "command.h"
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#include "source.h"
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||
#include "gdbcmd.h"
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#include "frame.h"
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||
#include "value.h"
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||
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||
#include <sys/types.h>
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||
#include "gdb_string.h"
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||
#include "gdb_stat.h"
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#include <fcntl.h>
|
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#include "gdbcore.h"
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||
#include "gdb_regex.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "annotate.h"
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#include "gdbtypes.h"
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#include "linespec.h"
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||
#include "filenames.h" /* for DOSish file names */
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||
#include "completer.h"
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||
#ifdef UI_OUT
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||
#include "ui-out.h"
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||
#endif
|
||
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||
#ifdef CRLF_SOURCE_FILES
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||
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||
/* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the
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host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is
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||
much faster than defining LSEEK_NOT_LINEAR. */
|
||
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||
#ifndef O_BINARY
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||
#define O_BINARY 0
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#endif
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||
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||
#define OPEN_MODE (O_RDONLY | O_BINARY)
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#define FDOPEN_MODE FOPEN_RB
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#else /* ! defined (CRLF_SOURCE_FILES) */
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||
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#define OPEN_MODE O_RDONLY
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||
#define FDOPEN_MODE FOPEN_RT
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||
#endif /* ! defined (CRLF_SOURCE_FILES) */
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||
|
||
/* Prototypes for exported functions. */
|
||
|
||
void _initialize_source (void);
|
||
|
||
/* Prototypes for local functions. */
|
||
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||
static int get_filename_and_charpos (struct symtab *, char **);
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||
|
||
static void reverse_search_command (char *, int);
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||
|
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static void forward_search_command (char *, int);
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||
|
||
static void line_info (char *, int);
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||
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||
static void list_command (char *, int);
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||
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static void ambiguous_line_spec (struct symtabs_and_lines *);
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static void source_info (char *, int);
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static void show_directories (char *, int);
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|
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/* Path of directories to search for source files.
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Same format as the PATH environment variable's value. */
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char *source_path;
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/* Symtab of default file for listing lines of. */
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struct symtab *current_source_symtab;
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/* Default next line to list. */
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||
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int current_source_line;
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|
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/* Default number of lines to print with commands like "list".
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This is based on guessing how many long (i.e. more than chars_per_line
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characters) lines there will be. To be completely correct, "list"
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and friends should be rewritten to count characters and see where
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things are wrapping, but that would be a fair amount of work. */
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||
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int lines_to_list = 10;
|
||
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/* Line number of last line printed. Default for various commands.
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current_source_line is usually, but not always, the same as this. */
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||
|
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static int last_line_listed;
|
||
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/* First line number listed by last listing command. */
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||
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static int first_line_listed;
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||
|
||
/* Saves the name of the last source file visited and a possible error code.
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Used to prevent repeating annoying "No such file or directories" msgs */
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static struct symtab *last_source_visited = NULL;
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static int last_source_error = 0;
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||
|
||
|
||
/* Set the source file default for the "list" command to be S.
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|
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If S is NULL, and we don't have a default, find one. This
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should only be called when the user actually tries to use the
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default, since we produce an error if we can't find a reasonable
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default. Also, since this can cause symbols to be read, doing it
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before we need to would make things slower than necessary. */
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void
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select_source_symtab (register struct symtab *s)
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{
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struct symtabs_and_lines sals;
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struct symtab_and_line sal;
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struct partial_symtab *ps;
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||
struct partial_symtab *cs_pst = 0;
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struct objfile *ofp;
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if (s)
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{
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current_source_symtab = s;
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current_source_line = 1;
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return;
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}
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|
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if (current_source_symtab)
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return;
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/* Make the default place to list be the function `main'
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if one exists. */
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if (lookup_symbol (main_name (), 0, VAR_NAMESPACE, 0, NULL))
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{
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sals = decode_line_spec (main_name (), 1);
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sal = sals.sals[0];
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xfree (sals.sals);
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current_source_symtab = sal.symtab;
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current_source_line = max (sal.line - (lines_to_list - 1), 1);
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if (current_source_symtab)
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return;
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}
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/* All right; find the last file in the symtab list (ignoring .h's). */
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current_source_line = 1;
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for (ofp = object_files; ofp != NULL; ofp = ofp->next)
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{
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for (s = ofp->symtabs; s; s = s->next)
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{
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char *name = s->filename;
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int len = strlen (name);
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if (!(len > 2 && (STREQ (&name[len - 2], ".h"))))
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{
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current_source_symtab = s;
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}
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}
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}
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if (current_source_symtab)
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return;
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/* Howabout the partial symbol tables? */
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for (ofp = object_files; ofp != NULL; ofp = ofp->next)
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{
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for (ps = ofp->psymtabs; ps != NULL; ps = ps->next)
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{
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char *name = ps->filename;
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int len = strlen (name);
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if (!(len > 2 && (STREQ (&name[len - 2], ".h"))))
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{
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cs_pst = ps;
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}
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}
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}
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if (cs_pst)
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{
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if (cs_pst->readin)
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{
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internal_error (__FILE__, __LINE__,
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"select_source_symtab: "
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"readin pst found and no symtabs.");
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}
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else
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{
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current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst);
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}
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}
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if (current_source_symtab)
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return;
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error ("Can't find a default source file");
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}
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static void
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show_directories (char *ignore, int from_tty)
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{
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puts_filtered ("Source directories searched: ");
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puts_filtered (source_path);
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puts_filtered ("\n");
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}
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/* Forget what we learned about line positions in source files, and
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which directories contain them; must check again now since files
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may be found in a different directory now. */
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void
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forget_cached_source_info (void)
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{
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register struct symtab *s;
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register struct objfile *objfile;
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for (objfile = object_files; objfile != NULL; objfile = objfile->next)
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{
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for (s = objfile->symtabs; s != NULL; s = s->next)
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{
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if (s->line_charpos != NULL)
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{
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mfree (objfile->md, s->line_charpos);
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s->line_charpos = NULL;
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}
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if (s->fullname != NULL)
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{
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mfree (objfile->md, s->fullname);
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s->fullname = NULL;
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}
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}
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}
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}
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void
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init_source_path (void)
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{
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char buf[20];
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sprintf (buf, "$cdir%c$cwd", DIRNAME_SEPARATOR);
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source_path = xstrdup (buf);
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forget_cached_source_info ();
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}
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/* Add zero or more directories to the front of the source path. */
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void
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directory_command (char *dirname, int from_tty)
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{
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dont_repeat ();
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/* FIXME, this goes to "delete dir"... */
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if (dirname == 0)
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{
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if (from_tty && query ("Reinitialize source path to empty? "))
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{
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xfree (source_path);
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init_source_path ();
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}
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}
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else
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{
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mod_path (dirname, &source_path);
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last_source_visited = NULL;
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}
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if (from_tty)
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show_directories ((char *) 0, from_tty);
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forget_cached_source_info ();
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}
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/* Add zero or more directories to the front of an arbitrary path. */
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void
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mod_path (char *dirname, char **which_path)
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{
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char *old = *which_path;
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int prefix = 0;
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if (dirname == 0)
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return;
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dirname = xstrdup (dirname);
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make_cleanup (xfree, dirname);
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do
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{
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char *name = dirname;
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register char *p;
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struct stat st;
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{
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char *separator = strchr (name, DIRNAME_SEPARATOR);
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char *space = strchr (name, ' ');
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char *tab = strchr (name, '\t');
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if (separator == 0 && space == 0 && tab == 0)
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p = dirname = name + strlen (name);
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else
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{
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p = 0;
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if (separator != 0 && (p == 0 || separator < p))
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p = separator;
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if (space != 0 && (p == 0 || space < p))
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p = space;
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if (tab != 0 && (p == 0 || tab < p))
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p = tab;
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dirname = p + 1;
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while (*dirname == DIRNAME_SEPARATOR
|
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|| *dirname == ' '
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|| *dirname == '\t')
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++dirname;
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}
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}
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|
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if (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */
|
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
||
/* On MS-DOS and MS-Windows, h:\ is different from h: */
|
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&& !(p == name + 3 && name[1] == ':') /* "d:/" */
|
||
#endif
|
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&& IS_DIR_SEPARATOR (p[-1]))
|
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/* Sigh. "foo/" => "foo" */
|
||
--p;
|
||
*p = '\0';
|
||
|
||
while (p > name && p[-1] == '.')
|
||
{
|
||
if (p - name == 1)
|
||
{
|
||
/* "." => getwd (). */
|
||
name = current_directory;
|
||
goto append;
|
||
}
|
||
else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2]))
|
||
{
|
||
if (p - name == 2)
|
||
{
|
||
/* "/." => "/". */
|
||
*--p = '\0';
|
||
goto append;
|
||
}
|
||
else
|
||
{
|
||
/* "...foo/." => "...foo". */
|
||
p -= 2;
|
||
*p = '\0';
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
|
||
if (name[0] == '~')
|
||
name = tilde_expand (name);
|
||
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
||
else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */
|
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name = concat (name, ".", NULL);
|
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#endif
|
||
else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$')
|
||
name = concat (current_directory, SLASH_STRING, name, NULL);
|
||
else
|
||
name = savestring (name, p - name);
|
||
make_cleanup (xfree, name);
|
||
|
||
/* Unless it's a variable, check existence. */
|
||
if (name[0] != '$')
|
||
{
|
||
/* These are warnings, not errors, since we don't want a
|
||
non-existent directory in a .gdbinit file to stop processing
|
||
of the .gdbinit file.
|
||
|
||
Whether they get added to the path is more debatable. Current
|
||
answer is yes, in case the user wants to go make the directory
|
||
or whatever. If the directory continues to not exist/not be
|
||
a directory/etc, then having them in the path should be
|
||
harmless. */
|
||
if (stat (name, &st) < 0)
|
||
{
|
||
int save_errno = errno;
|
||
fprintf_unfiltered (gdb_stderr, "Warning: ");
|
||
print_sys_errmsg (name, save_errno);
|
||
}
|
||
else if ((st.st_mode & S_IFMT) != S_IFDIR)
|
||
warning ("%s is not a directory.", name);
|
||
}
|
||
|
||
append:
|
||
{
|
||
register unsigned int len = strlen (name);
|
||
|
||
p = *which_path;
|
||
while (1)
|
||
{
|
||
/* FIXME: strncmp loses in interesting ways on MS-DOS and
|
||
MS-Windows because of case-insensitivity and two different
|
||
but functionally identical slash characters. We need a
|
||
special filesystem-dependent file-name comparison function.
|
||
|
||
Actually, even on Unix I would use realpath() or its work-
|
||
alike before comparing. Then all the code above which
|
||
removes excess slashes and dots could simply go away. */
|
||
if (!strncmp (p, name, len)
|
||
&& (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR))
|
||
{
|
||
/* Found it in the search path, remove old copy */
|
||
if (p > *which_path)
|
||
p--; /* Back over leading separator */
|
||
if (prefix > p - *which_path)
|
||
goto skip_dup; /* Same dir twice in one cmd */
|
||
strcpy (p, &p[len + 1]); /* Copy from next \0 or : */
|
||
}
|
||
p = strchr (p, DIRNAME_SEPARATOR);
|
||
if (p != 0)
|
||
++p;
|
||
else
|
||
break;
|
||
}
|
||
if (p == 0)
|
||
{
|
||
char tinybuf[2];
|
||
|
||
tinybuf[0] = DIRNAME_SEPARATOR;
|
||
tinybuf[1] = '\0';
|
||
|
||
/* If we have already tacked on a name(s) in this command, be sure they stay on the front as we tack on some more. */
|
||
if (prefix)
|
||
{
|
||
char *temp, c;
|
||
|
||
c = old[prefix];
|
||
old[prefix] = '\0';
|
||
temp = concat (old, tinybuf, name, NULL);
|
||
old[prefix] = c;
|
||
*which_path = concat (temp, "", &old[prefix], NULL);
|
||
prefix = strlen (temp);
|
||
xfree (temp);
|
||
}
|
||
else
|
||
{
|
||
*which_path = concat (name, (old[0] ? tinybuf : old), old, NULL);
|
||
prefix = strlen (name);
|
||
}
|
||
xfree (old);
|
||
old = *which_path;
|
||
}
|
||
}
|
||
skip_dup:;
|
||
}
|
||
while (*dirname != '\0');
|
||
}
|
||
|
||
|
||
static void
|
||
source_info (char *ignore, int from_tty)
|
||
{
|
||
register struct symtab *s = current_source_symtab;
|
||
|
||
if (!s)
|
||
{
|
||
printf_filtered ("No current source file.\n");
|
||
return;
|
||
}
|
||
printf_filtered ("Current source file is %s\n", s->filename);
|
||
if (s->dirname)
|
||
printf_filtered ("Compilation directory is %s\n", s->dirname);
|
||
if (s->fullname)
|
||
printf_filtered ("Located in %s\n", s->fullname);
|
||
if (s->nlines)
|
||
printf_filtered ("Contains %d line%s.\n", s->nlines,
|
||
s->nlines == 1 ? "" : "s");
|
||
|
||
printf_filtered ("Source language is %s.\n", language_str (s->language));
|
||
printf_filtered ("Compiled with %s debugging format.\n", s->debugformat);
|
||
}
|
||
|
||
|
||
|
||
/* Open a file named STRING, searching path PATH (dir names sep by some char)
|
||
using mode MODE and protection bits PROT in the calls to open.
|
||
|
||
If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
|
||
(ie pretend the first element of PATH is "."). This also indicates
|
||
that a slash in STRING disables searching of the path (this is
|
||
so that "exec-file ./foo" or "symbol-file ./foo" insures that you
|
||
get that particular version of foo or an error message).
|
||
|
||
If FILENAME_OPENED is non-null, set it to a newly allocated string naming
|
||
the actual file opened (this string will always start with a "/". We
|
||
have to take special pains to avoid doubling the "/" between the directory
|
||
and the file, sigh! Emacs gets confuzzed by this when we print the
|
||
source file name!!!
|
||
|
||
If a file is found, return the descriptor.
|
||
Otherwise, return -1, with errno set for the last name we tried to open. */
|
||
|
||
/* >>>> This should only allow files of certain types,
|
||
>>>> eg executable, non-directory */
|
||
int
|
||
openp (const char *path, int try_cwd_first, const char *string,
|
||
int mode, int prot,
|
||
char **filename_opened)
|
||
{
|
||
register int fd;
|
||
register char *filename;
|
||
const char *p;
|
||
const char *p1;
|
||
register int len;
|
||
int alloclen;
|
||
|
||
if (!path)
|
||
path = ".";
|
||
|
||
#if defined(_WIN32) || defined(__CYGWIN__)
|
||
mode |= O_BINARY;
|
||
#endif
|
||
|
||
if (try_cwd_first || IS_ABSOLUTE_PATH (string))
|
||
{
|
||
int i;
|
||
filename = alloca (strlen (string) + 1);
|
||
strcpy (filename, string);
|
||
fd = open (filename, mode, prot);
|
||
if (fd >= 0)
|
||
goto done;
|
||
for (i = 0; string[i]; i++)
|
||
if (IS_DIR_SEPARATOR (string[i]))
|
||
goto done;
|
||
}
|
||
|
||
/* ./foo => foo */
|
||
while (string[0] == '.' && IS_DIR_SEPARATOR (string[1]))
|
||
string += 2;
|
||
|
||
alloclen = strlen (path) + strlen (string) + 2;
|
||
filename = alloca (alloclen);
|
||
fd = -1;
|
||
for (p = path; p; p = p1 ? p1 + 1 : 0)
|
||
{
|
||
p1 = strchr (p, DIRNAME_SEPARATOR);
|
||
if (p1)
|
||
len = p1 - p;
|
||
else
|
||
len = strlen (p);
|
||
|
||
if (len == 4 && p[0] == '$' && p[1] == 'c'
|
||
&& p[2] == 'w' && p[3] == 'd')
|
||
{
|
||
/* Name is $cwd -- insert current directory name instead. */
|
||
int newlen;
|
||
|
||
/* First, realloc the filename buffer if too short. */
|
||
len = strlen (current_directory);
|
||
newlen = len + strlen (string) + 2;
|
||
if (newlen > alloclen)
|
||
{
|
||
alloclen = newlen;
|
||
filename = alloca (alloclen);
|
||
}
|
||
strcpy (filename, current_directory);
|
||
}
|
||
else
|
||
{
|
||
/* Normal file name in path -- just use it. */
|
||
strncpy (filename, p, len);
|
||
filename[len] = 0;
|
||
}
|
||
|
||
/* Remove trailing slashes */
|
||
while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1]))
|
||
filename[--len] = 0;
|
||
|
||
strcat (filename + len, SLASH_STRING);
|
||
strcat (filename, string);
|
||
|
||
fd = open (filename, mode);
|
||
if (fd >= 0)
|
||
break;
|
||
}
|
||
|
||
done:
|
||
if (filename_opened)
|
||
{
|
||
if (fd < 0)
|
||
*filename_opened = NULL;
|
||
else if (IS_ABSOLUTE_PATH (filename))
|
||
*filename_opened = savestring (filename, strlen (filename));
|
||
else
|
||
{
|
||
/* Beware the // my son, the Emacs barfs, the botch that catch... */
|
||
|
||
*filename_opened = concat (current_directory,
|
||
IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
|
||
? "" : SLASH_STRING,
|
||
filename, NULL);
|
||
}
|
||
}
|
||
/* OBSOLETE #ifdef MPW */
|
||
/* OBSOLETE This is a debugging hack that can go away when all combinations */
|
||
/* OBSOLETE of Mac and Unix names are handled reasonably. */
|
||
/* OBSOLETE { */
|
||
/* OBSOLETE extern int debug_openp; */
|
||
/* OBSOLETE */
|
||
/* OBSOLETE if (debug_openp) */
|
||
/* OBSOLETE { */
|
||
/* OBSOLETE printf ("openp on %s, path %s mode %d prot %d\n returned %d", */
|
||
/* OBSOLETE string, path, mode, prot, fd); */
|
||
/* OBSOLETE if (*filename_opened) */
|
||
/* OBSOLETE printf (" (filename is %s)", *filename_opened); */
|
||
/* OBSOLETE printf ("\n"); */
|
||
/* OBSOLETE } */
|
||
/* OBSOLETE } */
|
||
/* OBSOLETE #endif *//* MPW */
|
||
|
||
return fd;
|
||
}
|
||
|
||
|
||
/* This is essentially a convenience, for clients that want the behaviour
|
||
of openp, using source_path, but that really don't want the file to be
|
||
opened but want instead just to know what the full pathname is (as
|
||
qualified against source_path).
|
||
|
||
The current working directory is searched first.
|
||
|
||
If the file was found, this function returns 1, and FULL_PATHNAME is
|
||
set to the fully-qualified pathname.
|
||
|
||
Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
|
||
*/
|
||
int
|
||
source_full_path_of (char *filename, char **full_pathname)
|
||
{
|
||
int fd;
|
||
|
||
fd = openp (source_path, 1, filename, O_RDONLY, 0, full_pathname);
|
||
if (fd < 0)
|
||
{
|
||
*full_pathname = NULL;
|
||
return 0;
|
||
}
|
||
|
||
close (fd);
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Open a source file given a symtab S. Returns a file descriptor or
|
||
negative number for error. */
|
||
|
||
int
|
||
open_source_file (struct symtab *s)
|
||
{
|
||
char *path = source_path;
|
||
const char *p;
|
||
int result;
|
||
char *fullname;
|
||
|
||
/* Quick way out if we already know its full name */
|
||
if (s->fullname)
|
||
{
|
||
result = open (s->fullname, OPEN_MODE);
|
||
if (result >= 0)
|
||
return result;
|
||
/* Didn't work -- free old one, try again. */
|
||
mfree (s->objfile->md, s->fullname);
|
||
s->fullname = NULL;
|
||
}
|
||
|
||
if (s->dirname != NULL)
|
||
{
|
||
/* Replace a path entry of $cdir with the compilation directory name */
|
||
#define cdir_len 5
|
||
/* We cast strstr's result in case an ANSIhole has made it const,
|
||
which produces a "required warning" when assigned to a nonconst. */
|
||
p = (char *) strstr (source_path, "$cdir");
|
||
if (p && (p == path || p[-1] == DIRNAME_SEPARATOR)
|
||
&& (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0'))
|
||
{
|
||
int len;
|
||
|
||
path = (char *)
|
||
alloca (strlen (source_path) + 1 + strlen (s->dirname) + 1);
|
||
len = p - source_path;
|
||
strncpy (path, source_path, len); /* Before $cdir */
|
||
strcpy (path + len, s->dirname); /* new stuff */
|
||
strcat (path + len, source_path + len + cdir_len); /* After $cdir */
|
||
}
|
||
}
|
||
|
||
result = openp (path, 0, s->filename, OPEN_MODE, 0, &s->fullname);
|
||
if (result < 0)
|
||
{
|
||
/* Didn't work. Try using just the basename. */
|
||
p = lbasename (s->filename);
|
||
if (p != s->filename)
|
||
result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
|
||
}
|
||
/* OBSOLETE #ifdef MPW */
|
||
/* OBSOLETE if (result < 0) */
|
||
/* OBSOLETE { */
|
||
/* OBSOLETE *//* Didn't work. Try using just the MPW basename. */
|
||
/* OBSOLETE p = (char *) mpw_basename (s->filename); */
|
||
/* OBSOLETE if (p != s->filename) */
|
||
/* OBSOLETE result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname); */
|
||
/* OBSOLETE } */
|
||
/* OBSOLETE if (result < 0) */
|
||
/* OBSOLETE { */
|
||
/* OBSOLETE *//* Didn't work. Try using the mixed Unix/MPW basename. */
|
||
/* OBSOLETE p = (char *) mpw_mixed_basename (s->filename); */
|
||
/* OBSOLETE if (p != s->filename) */
|
||
/* OBSOLETE result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname); */
|
||
/* OBSOLETE } */
|
||
/* OBSOLETE #endif MPW */
|
||
|
||
if (result >= 0)
|
||
{
|
||
fullname = s->fullname;
|
||
s->fullname = mstrsave (s->objfile->md, s->fullname);
|
||
xfree (fullname);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/* Return the path to the source file associated with symtab. Returns NULL
|
||
if no symtab. */
|
||
|
||
char *
|
||
symtab_to_filename (struct symtab *s)
|
||
{
|
||
int fd;
|
||
|
||
if (!s)
|
||
return NULL;
|
||
|
||
/* If we've seen the file before, just return fullname. */
|
||
|
||
if (s->fullname)
|
||
return s->fullname;
|
||
|
||
/* Try opening the file to setup fullname */
|
||
|
||
fd = open_source_file (s);
|
||
if (fd < 0)
|
||
return s->filename; /* File not found. Just use short name */
|
||
|
||
/* Found the file. Cleanup and return the full name */
|
||
|
||
close (fd);
|
||
return s->fullname;
|
||
}
|
||
|
||
|
||
/* Create and initialize the table S->line_charpos that records
|
||
the positions of the lines in the source file, which is assumed
|
||
to be open on descriptor DESC.
|
||
All set S->nlines to the number of such lines. */
|
||
|
||
void
|
||
find_source_lines (struct symtab *s, int desc)
|
||
{
|
||
struct stat st;
|
||
register char *data, *p, *end;
|
||
int nlines = 0;
|
||
int lines_allocated = 1000;
|
||
int *line_charpos;
|
||
long mtime = 0;
|
||
int size;
|
||
|
||
line_charpos = (int *) xmmalloc (s->objfile->md,
|
||
lines_allocated * sizeof (int));
|
||
if (fstat (desc, &st) < 0)
|
||
perror_with_name (s->filename);
|
||
|
||
if (s && s->objfile && s->objfile->obfd)
|
||
mtime = bfd_get_mtime (s->objfile->obfd);
|
||
else if (exec_bfd)
|
||
mtime = bfd_get_mtime (exec_bfd);
|
||
|
||
if (mtime && mtime < st.st_mtime)
|
||
{
|
||
warning ("Source file is more recent than executable.\n");
|
||
}
|
||
|
||
#ifdef LSEEK_NOT_LINEAR
|
||
{
|
||
char c;
|
||
|
||
/* Have to read it byte by byte to find out where the chars live */
|
||
|
||
line_charpos[0] = lseek (desc, 0, SEEK_CUR);
|
||
nlines = 1;
|
||
while (myread (desc, &c, 1) > 0)
|
||
{
|
||
if (c == '\n')
|
||
{
|
||
if (nlines == lines_allocated)
|
||
{
|
||
lines_allocated *= 2;
|
||
line_charpos =
|
||
(int *) xmrealloc (s->objfile->md, (char *) line_charpos,
|
||
sizeof (int) * lines_allocated);
|
||
}
|
||
line_charpos[nlines++] = lseek (desc, 0, SEEK_CUR);
|
||
}
|
||
}
|
||
}
|
||
#else /* lseek linear. */
|
||
{
|
||
struct cleanup *old_cleanups;
|
||
|
||
/* st_size might be a large type, but we only support source files whose
|
||
size fits in an int. */
|
||
size = (int) st.st_size;
|
||
|
||
/* Use malloc, not alloca, because this may be pretty large, and we may
|
||
run into various kinds of limits on stack size. */
|
||
data = (char *) xmalloc (size);
|
||
old_cleanups = make_cleanup (xfree, data);
|
||
|
||
/* Reassign `size' to result of read for systems where \r\n -> \n. */
|
||
size = myread (desc, data, size);
|
||
if (size < 0)
|
||
perror_with_name (s->filename);
|
||
end = data + size;
|
||
p = data;
|
||
line_charpos[0] = 0;
|
||
nlines = 1;
|
||
while (p != end)
|
||
{
|
||
if (*p++ == '\n'
|
||
/* A newline at the end does not start a new line. */
|
||
&& p != end)
|
||
{
|
||
if (nlines == lines_allocated)
|
||
{
|
||
lines_allocated *= 2;
|
||
line_charpos =
|
||
(int *) xmrealloc (s->objfile->md, (char *) line_charpos,
|
||
sizeof (int) * lines_allocated);
|
||
}
|
||
line_charpos[nlines++] = p - data;
|
||
}
|
||
}
|
||
do_cleanups (old_cleanups);
|
||
}
|
||
#endif /* lseek linear. */
|
||
s->nlines = nlines;
|
||
s->line_charpos =
|
||
(int *) xmrealloc (s->objfile->md, (char *) line_charpos,
|
||
nlines * sizeof (int));
|
||
|
||
}
|
||
|
||
/* Return the character position of a line LINE in symtab S.
|
||
Return 0 if anything is invalid. */
|
||
|
||
#if 0 /* Currently unused */
|
||
|
||
int
|
||
source_line_charpos (struct symtab *s, int line)
|
||
{
|
||
if (!s)
|
||
return 0;
|
||
if (!s->line_charpos || line <= 0)
|
||
return 0;
|
||
if (line > s->nlines)
|
||
line = s->nlines;
|
||
return s->line_charpos[line - 1];
|
||
}
|
||
|
||
/* Return the line number of character position POS in symtab S. */
|
||
|
||
int
|
||
source_charpos_line (register struct symtab *s, register int chr)
|
||
{
|
||
register int line = 0;
|
||
register int *lnp;
|
||
|
||
if (s == 0 || s->line_charpos == 0)
|
||
return 0;
|
||
lnp = s->line_charpos;
|
||
/* Files are usually short, so sequential search is Ok */
|
||
while (line < s->nlines && *lnp <= chr)
|
||
{
|
||
line++;
|
||
lnp++;
|
||
}
|
||
if (line >= s->nlines)
|
||
line = s->nlines;
|
||
return line;
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
|
||
/* Get full pathname and line number positions for a symtab.
|
||
Return nonzero if line numbers may have changed.
|
||
Set *FULLNAME to actual name of the file as found by `openp',
|
||
or to 0 if the file is not found. */
|
||
|
||
static int
|
||
get_filename_and_charpos (struct symtab *s, char **fullname)
|
||
{
|
||
register int desc, linenums_changed = 0;
|
||
|
||
desc = open_source_file (s);
|
||
if (desc < 0)
|
||
{
|
||
if (fullname)
|
||
*fullname = NULL;
|
||
return 0;
|
||
}
|
||
if (fullname)
|
||
*fullname = s->fullname;
|
||
if (s->line_charpos == 0)
|
||
linenums_changed = 1;
|
||
if (linenums_changed)
|
||
find_source_lines (s, desc);
|
||
close (desc);
|
||
return linenums_changed;
|
||
}
|
||
|
||
/* Print text describing the full name of the source file S
|
||
and the line number LINE and its corresponding character position.
|
||
The text starts with two Ctrl-z so that the Emacs-GDB interface
|
||
can easily find it.
|
||
|
||
MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
|
||
|
||
Return 1 if successful, 0 if could not find the file. */
|
||
|
||
int
|
||
identify_source_line (struct symtab *s, int line, int mid_statement,
|
||
CORE_ADDR pc)
|
||
{
|
||
if (s->line_charpos == 0)
|
||
get_filename_and_charpos (s, (char **) NULL);
|
||
if (s->fullname == 0)
|
||
return 0;
|
||
if (line > s->nlines)
|
||
/* Don't index off the end of the line_charpos array. */
|
||
return 0;
|
||
annotate_source (s->fullname, line, s->line_charpos[line - 1],
|
||
mid_statement, pc);
|
||
|
||
current_source_line = line;
|
||
first_line_listed = line;
|
||
last_line_listed = line;
|
||
current_source_symtab = s;
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Print source lines from the file of symtab S,
|
||
starting with line number LINE and stopping before line number STOPLINE. */
|
||
|
||
static void print_source_lines_base (struct symtab *s, int line, int stopline,
|
||
int noerror);
|
||
static void
|
||
print_source_lines_base (struct symtab *s, int line, int stopline, int noerror)
|
||
{
|
||
register int c;
|
||
register int desc;
|
||
register FILE *stream;
|
||
int nlines = stopline - line;
|
||
|
||
/* Regardless of whether we can open the file, set current_source_symtab. */
|
||
current_source_symtab = s;
|
||
current_source_line = line;
|
||
first_line_listed = line;
|
||
|
||
#ifdef UI_OUT
|
||
/* If printing of source lines is disabled, just print file and line number */
|
||
if (ui_out_test_flags (uiout, ui_source_list))
|
||
{
|
||
#endif
|
||
/* Only prints "No such file or directory" once */
|
||
if ((s != last_source_visited) || (!last_source_error))
|
||
{
|
||
last_source_visited = s;
|
||
desc = open_source_file (s);
|
||
}
|
||
else
|
||
{
|
||
desc = last_source_error;
|
||
noerror = 1;
|
||
}
|
||
#ifdef UI_OUT
|
||
}
|
||
else
|
||
{
|
||
desc = -1;
|
||
noerror = 1;
|
||
}
|
||
#endif
|
||
|
||
if (desc < 0)
|
||
{
|
||
last_source_error = desc;
|
||
|
||
if (!noerror)
|
||
{
|
||
char *name = alloca (strlen (s->filename) + 100);
|
||
sprintf (name, "%d\t%s", line, s->filename);
|
||
print_sys_errmsg (name, errno);
|
||
}
|
||
else
|
||
#ifdef UI_OUT
|
||
ui_out_field_int (uiout, "line", line);
|
||
ui_out_text (uiout, "\tin ");
|
||
ui_out_field_string (uiout, "file", s->filename);
|
||
ui_out_text (uiout, "\n");
|
||
#else
|
||
printf_filtered ("%d\tin %s\n", line, s->filename);
|
||
#endif
|
||
|
||
return;
|
||
}
|
||
|
||
last_source_error = 0;
|
||
|
||
if (s->line_charpos == 0)
|
||
find_source_lines (s, desc);
|
||
|
||
if (line < 1 || line > s->nlines)
|
||
{
|
||
close (desc);
|
||
error ("Line number %d out of range; %s has %d lines.",
|
||
line, s->filename, s->nlines);
|
||
}
|
||
|
||
if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
|
||
{
|
||
close (desc);
|
||
perror_with_name (s->filename);
|
||
}
|
||
|
||
stream = fdopen (desc, FDOPEN_MODE);
|
||
clearerr (stream);
|
||
|
||
while (nlines-- > 0)
|
||
{
|
||
#ifdef UI_OUT
|
||
char buf[20];
|
||
|
||
c = fgetc (stream);
|
||
if (c == EOF)
|
||
break;
|
||
last_line_listed = current_source_line;
|
||
sprintf (buf, "%d\t", current_source_line++);
|
||
ui_out_text (uiout, buf);
|
||
do
|
||
{
|
||
if (c < 040 && c != '\t' && c != '\n' && c != '\r')
|
||
{
|
||
sprintf (buf, "^%c", c + 0100);
|
||
ui_out_text (uiout, buf);
|
||
}
|
||
else if (c == 0177)
|
||
ui_out_text (uiout, "^?");
|
||
#ifdef CRLF_SOURCE_FILES
|
||
else if (c == '\r')
|
||
{
|
||
/* Skip a \r character, but only before a \n. */
|
||
int c1 = fgetc (stream);
|
||
|
||
if (c1 != '\n')
|
||
printf_filtered ("^%c", c + 0100);
|
||
if (c1 != EOF)
|
||
ungetc (c1, stream);
|
||
}
|
||
#endif
|
||
else
|
||
{
|
||
sprintf (buf, "%c", c);
|
||
ui_out_text (uiout, buf);
|
||
}
|
||
}
|
||
while (c != '\n' && (c = fgetc (stream)) >= 0);
|
||
#else
|
||
c = fgetc (stream);
|
||
if (c == EOF)
|
||
break;
|
||
last_line_listed = current_source_line;
|
||
printf_filtered ("%d\t", current_source_line++);
|
||
do
|
||
{
|
||
if (c < 040 && c != '\t' && c != '\n' && c != '\r')
|
||
printf_filtered ("^%c", c + 0100);
|
||
else if (c == 0177)
|
||
printf_filtered ("^?");
|
||
#ifdef CRLF_SOURCE_FILES
|
||
else if (c == '\r')
|
||
{
|
||
/* Just skip \r characters. */
|
||
}
|
||
#endif
|
||
else
|
||
printf_filtered ("%c", c);
|
||
}
|
||
while (c != '\n' && (c = fgetc (stream)) >= 0);
|
||
#endif
|
||
}
|
||
|
||
fclose (stream);
|
||
}
|
||
|
||
/* Show source lines from the file of symtab S, starting with line
|
||
number LINE and stopping before line number STOPLINE. If this is the
|
||
not the command line version, then the source is shown in the source
|
||
window otherwise it is simply printed */
|
||
|
||
void
|
||
print_source_lines (struct symtab *s, int line, int stopline, int noerror)
|
||
{
|
||
print_source_lines_base (s, line, stopline, noerror);
|
||
}
|
||
|
||
|
||
|
||
/* Print a list of files and line numbers which a user may choose from
|
||
in order to list a function which was specified ambiguously (as with
|
||
`list classname::overloadedfuncname', for example). The vector in
|
||
SALS provides the filenames and line numbers. */
|
||
|
||
static void
|
||
ambiguous_line_spec (struct symtabs_and_lines *sals)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < sals->nelts; ++i)
|
||
printf_filtered ("file: \"%s\", line number: %d\n",
|
||
sals->sals[i].symtab->filename, sals->sals[i].line);
|
||
}
|
||
|
||
static void
|
||
list_command (char *arg, int from_tty)
|
||
{
|
||
struct symtabs_and_lines sals, sals_end;
|
||
struct symtab_and_line sal, sal_end;
|
||
struct symbol *sym;
|
||
char *arg1;
|
||
int no_end = 1;
|
||
int dummy_end = 0;
|
||
int dummy_beg = 0;
|
||
int linenum_beg = 0;
|
||
char *p;
|
||
|
||
if (!have_full_symbols () && !have_partial_symbols ())
|
||
error ("No symbol table is loaded. Use the \"file\" command.");
|
||
|
||
/* Pull in a current source symtab if necessary */
|
||
if (current_source_symtab == 0 &&
|
||
(arg == 0 || arg[0] == '+' || arg[0] == '-'))
|
||
select_source_symtab (0);
|
||
|
||
/* "l" or "l +" lists next ten lines. */
|
||
|
||
if (arg == 0 || STREQ (arg, "+"))
|
||
{
|
||
if (current_source_symtab == 0)
|
||
error ("No default source file yet. Do \"help list\".");
|
||
print_source_lines (current_source_symtab, current_source_line,
|
||
current_source_line + lines_to_list, 0);
|
||
return;
|
||
}
|
||
|
||
/* "l -" lists previous ten lines, the ones before the ten just listed. */
|
||
if (STREQ (arg, "-"))
|
||
{
|
||
if (current_source_symtab == 0)
|
||
error ("No default source file yet. Do \"help list\".");
|
||
print_source_lines (current_source_symtab,
|
||
max (first_line_listed - lines_to_list, 1),
|
||
first_line_listed, 0);
|
||
return;
|
||
}
|
||
|
||
/* Now if there is only one argument, decode it in SAL
|
||
and set NO_END.
|
||
If there are two arguments, decode them in SAL and SAL_END
|
||
and clear NO_END; however, if one of the arguments is blank,
|
||
set DUMMY_BEG or DUMMY_END to record that fact. */
|
||
|
||
arg1 = arg;
|
||
if (*arg1 == ',')
|
||
dummy_beg = 1;
|
||
else
|
||
{
|
||
sals = decode_line_1 (&arg1, 0, 0, 0, 0);
|
||
|
||
if (!sals.nelts)
|
||
return; /* C++ */
|
||
if (sals.nelts > 1)
|
||
{
|
||
ambiguous_line_spec (&sals);
|
||
xfree (sals.sals);
|
||
return;
|
||
}
|
||
|
||
sal = sals.sals[0];
|
||
xfree (sals.sals);
|
||
}
|
||
|
||
/* Record whether the BEG arg is all digits. */
|
||
|
||
for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++);
|
||
linenum_beg = (p == arg1);
|
||
|
||
while (*arg1 == ' ' || *arg1 == '\t')
|
||
arg1++;
|
||
if (*arg1 == ',')
|
||
{
|
||
no_end = 0;
|
||
arg1++;
|
||
while (*arg1 == ' ' || *arg1 == '\t')
|
||
arg1++;
|
||
if (*arg1 == 0)
|
||
dummy_end = 1;
|
||
else
|
||
{
|
||
if (dummy_beg)
|
||
sals_end = decode_line_1 (&arg1, 0, 0, 0, 0);
|
||
else
|
||
sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line, 0);
|
||
if (sals_end.nelts == 0)
|
||
return;
|
||
if (sals_end.nelts > 1)
|
||
{
|
||
ambiguous_line_spec (&sals_end);
|
||
xfree (sals_end.sals);
|
||
return;
|
||
}
|
||
sal_end = sals_end.sals[0];
|
||
xfree (sals_end.sals);
|
||
}
|
||
}
|
||
|
||
if (*arg1)
|
||
error ("Junk at end of line specification.");
|
||
|
||
if (!no_end && !dummy_beg && !dummy_end
|
||
&& sal.symtab != sal_end.symtab)
|
||
error ("Specified start and end are in different files.");
|
||
if (dummy_beg && dummy_end)
|
||
error ("Two empty args do not say what lines to list.");
|
||
|
||
/* if line was specified by address,
|
||
first print exactly which line, and which file.
|
||
In this case, sal.symtab == 0 means address is outside
|
||
of all known source files, not that user failed to give a filename. */
|
||
if (*arg == '*')
|
||
{
|
||
if (sal.symtab == 0)
|
||
/* FIXME-32x64--assumes sal.pc fits in long. */
|
||
error ("No source file for address %s.",
|
||
local_hex_string ((unsigned long) sal.pc));
|
||
sym = find_pc_function (sal.pc);
|
||
if (sym)
|
||
{
|
||
print_address_numeric (sal.pc, 1, gdb_stdout);
|
||
printf_filtered (" is in ");
|
||
fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
|
||
printf_filtered (" (%s:%d).\n", sal.symtab->filename, sal.line);
|
||
}
|
||
else
|
||
{
|
||
print_address_numeric (sal.pc, 1, gdb_stdout);
|
||
printf_filtered (" is at %s:%d.\n",
|
||
sal.symtab->filename, sal.line);
|
||
}
|
||
}
|
||
|
||
/* If line was not specified by just a line number,
|
||
and it does not imply a symtab, it must be an undebuggable symbol
|
||
which means no source code. */
|
||
|
||
if (!linenum_beg && sal.symtab == 0)
|
||
error ("No line number known for %s.", arg);
|
||
|
||
/* If this command is repeated with RET,
|
||
turn it into the no-arg variant. */
|
||
|
||
if (from_tty)
|
||
*arg = 0;
|
||
|
||
if (dummy_beg && sal_end.symtab == 0)
|
||
error ("No default source file yet. Do \"help list\".");
|
||
if (dummy_beg)
|
||
print_source_lines (sal_end.symtab,
|
||
max (sal_end.line - (lines_to_list - 1), 1),
|
||
sal_end.line + 1, 0);
|
||
else if (sal.symtab == 0)
|
||
error ("No default source file yet. Do \"help list\".");
|
||
else if (no_end)
|
||
{
|
||
int first_line = sal.line - lines_to_list / 2;
|
||
|
||
if (first_line < 1) first_line = 1;
|
||
|
||
print_source_lines (sal.symtab, first_line, first_line + lines_to_list,
|
||
0);
|
||
}
|
||
else
|
||
print_source_lines (sal.symtab, sal.line,
|
||
(dummy_end
|
||
? sal.line + lines_to_list
|
||
: sal_end.line + 1),
|
||
0);
|
||
}
|
||
|
||
/* Print info on range of pc's in a specified line. */
|
||
|
||
static void
|
||
line_info (char *arg, int from_tty)
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
CORE_ADDR start_pc, end_pc;
|
||
int i;
|
||
|
||
INIT_SAL (&sal); /* initialize to zeroes */
|
||
|
||
if (arg == 0)
|
||
{
|
||
sal.symtab = current_source_symtab;
|
||
sal.line = last_line_listed;
|
||
sals.nelts = 1;
|
||
sals.sals = (struct symtab_and_line *)
|
||
xmalloc (sizeof (struct symtab_and_line));
|
||
sals.sals[0] = sal;
|
||
}
|
||
else
|
||
{
|
||
sals = decode_line_spec_1 (arg, 0);
|
||
|
||
dont_repeat ();
|
||
}
|
||
|
||
/* C++ More than one line may have been specified, as when the user
|
||
specifies an overloaded function name. Print info on them all. */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
|
||
if (sal.symtab == 0)
|
||
{
|
||
printf_filtered ("No line number information available");
|
||
if (sal.pc != 0)
|
||
{
|
||
/* This is useful for "info line *0x7f34". If we can't tell the
|
||
user about a source line, at least let them have the symbolic
|
||
address. */
|
||
printf_filtered (" for address ");
|
||
wrap_here (" ");
|
||
print_address (sal.pc, gdb_stdout);
|
||
}
|
||
else
|
||
printf_filtered (".");
|
||
printf_filtered ("\n");
|
||
}
|
||
else if (sal.line > 0
|
||
&& find_line_pc_range (sal, &start_pc, &end_pc))
|
||
{
|
||
if (start_pc == end_pc)
|
||
{
|
||
printf_filtered ("Line %d of \"%s\"",
|
||
sal.line, sal.symtab->filename);
|
||
wrap_here (" ");
|
||
printf_filtered (" is at address ");
|
||
print_address (start_pc, gdb_stdout);
|
||
wrap_here (" ");
|
||
printf_filtered (" but contains no code.\n");
|
||
}
|
||
else
|
||
{
|
||
printf_filtered ("Line %d of \"%s\"",
|
||
sal.line, sal.symtab->filename);
|
||
wrap_here (" ");
|
||
printf_filtered (" starts at address ");
|
||
print_address (start_pc, gdb_stdout);
|
||
wrap_here (" ");
|
||
printf_filtered (" and ends at ");
|
||
print_address (end_pc, gdb_stdout);
|
||
printf_filtered (".\n");
|
||
}
|
||
|
||
/* x/i should display this line's code. */
|
||
set_next_address (start_pc);
|
||
|
||
/* Repeating "info line" should do the following line. */
|
||
last_line_listed = sal.line + 1;
|
||
|
||
/* If this is the only line, show the source code. If it could
|
||
not find the file, don't do anything special. */
|
||
if (annotation_level && sals.nelts == 1)
|
||
identify_source_line (sal.symtab, sal.line, 0, start_pc);
|
||
}
|
||
else
|
||
/* Is there any case in which we get here, and have an address
|
||
which the user would want to see? If we have debugging symbols
|
||
and no line numbers? */
|
||
printf_filtered ("Line number %d is out of range for \"%s\".\n",
|
||
sal.line, sal.symtab->filename);
|
||
}
|
||
xfree (sals.sals);
|
||
}
|
||
|
||
/* Commands to search the source file for a regexp. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
forward_search_command (char *regex, int from_tty)
|
||
{
|
||
register int c;
|
||
register int desc;
|
||
register FILE *stream;
|
||
int line;
|
||
char *msg;
|
||
|
||
line = last_line_listed + 1;
|
||
|
||
msg = (char *) re_comp (regex);
|
||
if (msg)
|
||
error (msg);
|
||
|
||
if (current_source_symtab == 0)
|
||
select_source_symtab (0);
|
||
|
||
desc = open_source_file (current_source_symtab);
|
||
if (desc < 0)
|
||
perror_with_name (current_source_symtab->filename);
|
||
|
||
if (current_source_symtab->line_charpos == 0)
|
||
find_source_lines (current_source_symtab, desc);
|
||
|
||
if (line < 1 || line > current_source_symtab->nlines)
|
||
{
|
||
close (desc);
|
||
error ("Expression not found");
|
||
}
|
||
|
||
if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
|
||
{
|
||
close (desc);
|
||
perror_with_name (current_source_symtab->filename);
|
||
}
|
||
|
||
stream = fdopen (desc, FDOPEN_MODE);
|
||
clearerr (stream);
|
||
while (1)
|
||
{
|
||
static char *buf = NULL;
|
||
register char *p;
|
||
int cursize, newsize;
|
||
|
||
cursize = 256;
|
||
buf = xmalloc (cursize);
|
||
p = buf;
|
||
|
||
c = getc (stream);
|
||
if (c == EOF)
|
||
break;
|
||
do
|
||
{
|
||
*p++ = c;
|
||
if (p - buf == cursize)
|
||
{
|
||
newsize = cursize + cursize / 2;
|
||
buf = xrealloc (buf, newsize);
|
||
p = buf + cursize;
|
||
cursize = newsize;
|
||
}
|
||
}
|
||
while (c != '\n' && (c = getc (stream)) >= 0);
|
||
|
||
#ifdef CRLF_SOURCE_FILES
|
||
/* Remove the \r, if any, at the end of the line, otherwise
|
||
regular expressions that end with $ or \n won't work. */
|
||
if (p - buf > 1 && p[-2] == '\r')
|
||
{
|
||
p--;
|
||
p[-1] = '\n';
|
||
}
|
||
#endif
|
||
|
||
/* we now have a source line in buf, null terminate and match */
|
||
*p = 0;
|
||
if (re_exec (buf) > 0)
|
||
{
|
||
/* Match! */
|
||
fclose (stream);
|
||
print_source_lines (current_source_symtab, line, line + 1, 0);
|
||
set_internalvar (lookup_internalvar ("_"),
|
||
value_from_longest (builtin_type_int,
|
||
(LONGEST) line));
|
||
current_source_line = max (line - lines_to_list / 2, 1);
|
||
return;
|
||
}
|
||
line++;
|
||
}
|
||
|
||
printf_filtered ("Expression not found\n");
|
||
fclose (stream);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
reverse_search_command (char *regex, int from_tty)
|
||
{
|
||
register int c;
|
||
register int desc;
|
||
register FILE *stream;
|
||
int line;
|
||
char *msg;
|
||
|
||
line = last_line_listed - 1;
|
||
|
||
msg = (char *) re_comp (regex);
|
||
if (msg)
|
||
error (msg);
|
||
|
||
if (current_source_symtab == 0)
|
||
select_source_symtab (0);
|
||
|
||
desc = open_source_file (current_source_symtab);
|
||
if (desc < 0)
|
||
perror_with_name (current_source_symtab->filename);
|
||
|
||
if (current_source_symtab->line_charpos == 0)
|
||
find_source_lines (current_source_symtab, desc);
|
||
|
||
if (line < 1 || line > current_source_symtab->nlines)
|
||
{
|
||
close (desc);
|
||
error ("Expression not found");
|
||
}
|
||
|
||
if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
|
||
{
|
||
close (desc);
|
||
perror_with_name (current_source_symtab->filename);
|
||
}
|
||
|
||
stream = fdopen (desc, FDOPEN_MODE);
|
||
clearerr (stream);
|
||
while (line > 1)
|
||
{
|
||
/* FIXME!!! We walk right off the end of buf if we get a long line!!! */
|
||
char buf[4096]; /* Should be reasonable??? */
|
||
register char *p = buf;
|
||
|
||
c = getc (stream);
|
||
if (c == EOF)
|
||
break;
|
||
do
|
||
{
|
||
*p++ = c;
|
||
}
|
||
while (c != '\n' && (c = getc (stream)) >= 0);
|
||
|
||
#ifdef CRLF_SOURCE_FILES
|
||
/* Remove the \r, if any, at the end of the line, otherwise
|
||
regular expressions that end with $ or \n won't work. */
|
||
if (p - buf > 1 && p[-2] == '\r')
|
||
{
|
||
p--;
|
||
p[-1] = '\n';
|
||
}
|
||
#endif
|
||
|
||
/* We now have a source line in buf; null terminate and match. */
|
||
*p = 0;
|
||
if (re_exec (buf) > 0)
|
||
{
|
||
/* Match! */
|
||
fclose (stream);
|
||
print_source_lines (current_source_symtab, line, line + 1, 0);
|
||
set_internalvar (lookup_internalvar ("_"),
|
||
value_from_longest (builtin_type_int,
|
||
(LONGEST) line));
|
||
current_source_line = max (line - lines_to_list / 2, 1);
|
||
return;
|
||
}
|
||
line--;
|
||
if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0)
|
||
{
|
||
fclose (stream);
|
||
perror_with_name (current_source_symtab->filename);
|
||
}
|
||
}
|
||
|
||
printf_filtered ("Expression not found\n");
|
||
fclose (stream);
|
||
return;
|
||
}
|
||
|
||
void
|
||
_initialize_source (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
current_source_symtab = 0;
|
||
init_source_path ();
|
||
|
||
/* The intention is to use POSIX Basic Regular Expressions.
|
||
Always use the GNU regex routine for consistency across all hosts.
|
||
Our current GNU regex.c does not have all the POSIX features, so this is
|
||
just an approximation. */
|
||
re_set_syntax (RE_SYNTAX_GREP);
|
||
|
||
c = add_cmd ("directory", class_files, directory_command,
|
||
"Add directory DIR to beginning of search path for source files.\n\
|
||
Forget cached info on source file locations and line positions.\n\
|
||
DIR can also be $cwd for the current working directory, or $cdir for the\n\
|
||
directory in which the source file was compiled into object code.\n\
|
||
With no argument, reset the search path to $cdir:$cwd, the default.",
|
||
&cmdlist);
|
||
|
||
if (dbx_commands)
|
||
add_com_alias ("use", "directory", class_files, 0);
|
||
|
||
c->completer = filename_completer;
|
||
|
||
add_cmd ("directories", no_class, show_directories,
|
||
"Current search path for finding source files.\n\
|
||
$cwd in the path means the current working directory.\n\
|
||
$cdir in the path means the compilation directory of the source file.",
|
||
&showlist);
|
||
|
||
if (xdb_commands)
|
||
{
|
||
add_com_alias ("D", "directory", class_files, 0);
|
||
add_cmd ("ld", no_class, show_directories,
|
||
"Current search path for finding source files.\n\
|
||
$cwd in the path means the current working directory.\n\
|
||
$cdir in the path means the compilation directory of the source file.",
|
||
&cmdlist);
|
||
}
|
||
|
||
add_info ("source", source_info,
|
||
"Information about the current source file.");
|
||
|
||
add_info ("line", line_info,
|
||
concat ("Core addresses of the code for a source line.\n\
|
||
Line can be specified as\n\
|
||
LINENUM, to list around that line in current file,\n\
|
||
FILE:LINENUM, to list around that line in that file,\n\
|
||
FUNCTION, to list around beginning of that function,\n\
|
||
FILE:FUNCTION, to distinguish among like-named static functions.\n\
|
||
", "\
|
||
Default is to describe the last source line that was listed.\n\n\
|
||
This sets the default address for \"x\" to the line's first instruction\n\
|
||
so that \"x/i\" suffices to start examining the machine code.\n\
|
||
The address is also stored as the value of \"$_\".", NULL));
|
||
|
||
add_com ("forward-search", class_files, forward_search_command,
|
||
"Search for regular expression (see regex(3)) from last line listed.\n\
|
||
The matching line number is also stored as the value of \"$_\".");
|
||
add_com_alias ("search", "forward-search", class_files, 0);
|
||
|
||
add_com ("reverse-search", class_files, reverse_search_command,
|
||
"Search backward for regular expression (see regex(3)) from last line listed.\n\
|
||
The matching line number is also stored as the value of \"$_\".");
|
||
|
||
if (xdb_commands)
|
||
{
|
||
add_com_alias ("/", "forward-search", class_files, 0);
|
||
add_com_alias ("?", "reverse-search", class_files, 0);
|
||
}
|
||
|
||
add_com ("list", class_files, list_command,
|
||
concat ("List specified function or line.\n\
|
||
With no argument, lists ten more lines after or around previous listing.\n\
|
||
\"list -\" lists the ten lines before a previous ten-line listing.\n\
|
||
One argument specifies a line, and ten lines are listed around that line.\n\
|
||
Two arguments with comma between specify starting and ending lines to list.\n\
|
||
", "\
|
||
Lines can be specified in these ways:\n\
|
||
LINENUM, to list around that line in current file,\n\
|
||
FILE:LINENUM, to list around that line in that file,\n\
|
||
FUNCTION, to list around beginning of that function,\n\
|
||
FILE:FUNCTION, to distinguish among like-named static functions.\n\
|
||
*ADDRESS, to list around the line containing that address.\n\
|
||
With two args if one is empty it stands for ten lines away from the other arg.", NULL));
|
||
|
||
if (!xdb_commands)
|
||
add_com_alias ("l", "list", class_files, 1);
|
||
else
|
||
add_com_alias ("v", "list", class_files, 1);
|
||
|
||
if (dbx_commands)
|
||
add_com_alias ("file", "list", class_files, 1);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("listsize", class_support, var_uinteger,
|
||
(char *) &lines_to_list,
|
||
"Set number of source lines gdb will list by default.",
|
||
&setlist),
|
||
&showlist);
|
||
}
|