1187 lines
30 KiB
C
1187 lines
30 KiB
C
/* List lines of source files for GDB, the GNU debugger.
|
||
Copyright (C) 1986, 1987, 1988, 1989, 1991 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
GDB is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 1, or (at your option)
|
||
any later version.
|
||
|
||
GDB is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GDB; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include <stdio.h>
|
||
#include "defs.h"
|
||
#include "symtab.h"
|
||
#include "param.h"
|
||
#include "command.h"
|
||
#include "frame.h"
|
||
|
||
#ifdef USG
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||
#include <sys/types.h>
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||
#endif
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||
|
||
#include <string.h>
|
||
#include <sys/param.h>
|
||
#include <sys/stat.h>
|
||
#include <fcntl.h>
|
||
#include "gdbcore.h"
|
||
|
||
extern char *strstr();
|
||
|
||
extern void set_next_address ();
|
||
|
||
void mod_path ();
|
||
|
||
/* Path of directories to search for source files.
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||
Same format as the PATH environment variable's value. */
|
||
|
||
char *source_path;
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||
|
||
/* Symtab of default file for listing lines of. */
|
||
|
||
struct symtab *current_source_symtab;
|
||
|
||
/* Default next line to list. */
|
||
|
||
int current_source_line;
|
||
|
||
/* Line number of last line printed. Default for various commands.
|
||
current_source_line is usually, but not always, the same as this. */
|
||
|
||
static int last_line_listed;
|
||
|
||
/* First line number listed by last listing command. */
|
||
|
||
static int first_line_listed;
|
||
|
||
|
||
/* Set the source file default for the "list" command, specifying a
|
||
symtab. Sigh. Behavior specification: If it is called with a
|
||
non-zero argument, that is the symtab to select. If it is not,
|
||
first lookup "main"; if it exists, use the symtab and line it
|
||
defines. If not, take the last symtab in the symtab_list (if it
|
||
exists) or the last symtab in the psymtab_list (if *it* exists). If
|
||
none of this works, report an error. */
|
||
|
||
void
|
||
select_source_symtab (s)
|
||
register struct symtab *s;
|
||
{
|
||
struct symtabs_and_lines sals;
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||
struct symtab_and_line sal;
|
||
struct partial_symtab *ps;
|
||
struct partial_symtab *cs_pst = 0;
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||
|
||
if (s)
|
||
{
|
||
current_source_symtab = s;
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||
current_source_line = 1;
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||
return;
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||
}
|
||
|
||
/* Make the default place to list be the function `main'
|
||
if one exists. */
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||
if (lookup_symbol ("main", 0, VAR_NAMESPACE, 0, NULL))
|
||
{
|
||
sals = decode_line_spec ("main", 1);
|
||
sal = sals.sals[0];
|
||
free (sals.sals);
|
||
current_source_symtab = sal.symtab;
|
||
current_source_line = max (sal.line - (lines_to_list () - 1), 1);
|
||
return;
|
||
}
|
||
|
||
/* All right; find the last file in the symtab list (ignoring .h's). */
|
||
|
||
if (s = symtab_list)
|
||
{
|
||
do
|
||
{
|
||
char *name = s->filename;
|
||
int len = strlen (name);
|
||
if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
|
||
current_source_symtab = s;
|
||
s = s->next;
|
||
}
|
||
while (s);
|
||
current_source_line = 1;
|
||
}
|
||
else if (partial_symtab_list)
|
||
{
|
||
ps = partial_symtab_list;
|
||
while (ps)
|
||
{
|
||
char *name = ps->filename;
|
||
int len = strlen (name);
|
||
if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
|
||
cs_pst = ps;
|
||
ps = ps->next;
|
||
}
|
||
if (cs_pst)
|
||
if (cs_pst->readin)
|
||
fatal ("Internal: select_source_symtab: readin pst found and no symtabs.");
|
||
else
|
||
current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst);
|
||
else
|
||
current_source_symtab = 0;
|
||
current_source_line = 1;
|
||
}
|
||
}
|
||
|
||
static void
|
||
directories_info ()
|
||
{
|
||
printf ("Source directories searched: %s\n", source_path);
|
||
}
|
||
|
||
/* Forget what we learned about line positions in source files,
|
||
and which directories contain them;
|
||
must check again now since files may be found in
|
||
a different directory now. */
|
||
|
||
void
|
||
forget_cached_source_info ()
|
||
{
|
||
register struct symtab *s;
|
||
|
||
for (s = symtab_list; s; s = s->next)
|
||
{
|
||
if (s->line_charpos != 0)
|
||
{
|
||
free (s->line_charpos);
|
||
s->line_charpos = 0;
|
||
}
|
||
if (s->fullname != 0)
|
||
{
|
||
free (s->fullname);
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||
s->fullname = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
void
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||
init_source_path ()
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||
{
|
||
source_path = savestring ("$cdir:$cwd", /* strlen of it */ 10);
|
||
forget_cached_source_info ();
|
||
}
|
||
|
||
/* Add zero or more directories to the front of the source path. */
|
||
|
||
void
|
||
directory_command (dirname, from_tty)
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||
char *dirname;
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||
int from_tty;
|
||
{
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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 (query ("Reinitialize source path to empty? ", ""))
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||
{
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||
free (source_path);
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||
init_source_path ();
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||
}
|
||
}
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||
else
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||
mod_path (dirname, from_tty, &source_path);
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||
if (from_tty)
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directories_info ();
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forget_cached_source_info ();
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||
}
|
||
|
||
/* Add zero or more directories to the front of an arbitrary path. */
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||
|
||
void
|
||
mod_path (dirname, from_tty, which_path)
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||
char *dirname;
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||
int from_tty;
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||
char **which_path;
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||
{
|
||
char *old = *which_path;
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||
int prefix = 0;
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||
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||
if (dirname == 0)
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||
return;
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||
|
||
dirname = strsave (dirname);
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||
make_cleanup (free, dirname);
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||
|
||
do
|
||
{
|
||
extern char *index ();
|
||
char *name = dirname;
|
||
register char *p;
|
||
struct stat st;
|
||
|
||
{
|
||
char *colon = index (name, ':');
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||
char *space = index (name, ' ');
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||
char *tab = index (name, '\t');
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||
if (colon == 0 && space == 0 && tab == 0)
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||
p = dirname = name + strlen (name);
|
||
else
|
||
{
|
||
p = 0;
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||
if (colon != 0 && (p == 0 || colon < p))
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||
p = colon;
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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 == ' ' || *dirname == '\t')
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||
++dirname;
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||
}
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||
}
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||
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if (p[-1] == '/')
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||
/* Sigh. "foo/" => "foo" */
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||
--p;
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||
*p = '\0';
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||
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||
while (p[-1] == '.')
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||
{
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||
if (p - name == 1)
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||
{
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||
/* "." => getwd (). */
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||
name = current_directory;
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||
goto append;
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||
}
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||
else if (p[-2] == '/')
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||
{
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||
if (p - name == 2)
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{
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||
/* "/." => "/". */
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*--p = '\0';
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goto append;
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||
}
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||
else
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||
{
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/* "...foo/." => "...foo". */
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p -= 2;
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*p = '\0';
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||
continue;
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||
}
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||
}
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||
else
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||
break;
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||
}
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||
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||
if (name[0] == '~')
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name = tilde_expand (name);
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||
else if (name[0] != '/' && name[0] != '$')
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||
name = concat (current_directory, "/", name);
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||
else
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||
name = savestring (name, p - name);
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||
make_cleanup (free, name);
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||
|
||
/* Unless it's a variable, check existence. */
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||
if (name[0] != '$') {
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||
if (stat (name, &st) < 0)
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||
perror_with_name (name);
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||
if ((st.st_mode & S_IFMT) != S_IFDIR)
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||
error ("%s is not a directory.", name);
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||
}
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||
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append:
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||
{
|
||
register unsigned int len = strlen (name);
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||
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||
p = *which_path;
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while (1)
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{
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||
if (!strncmp (p, name, len)
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||
&& (p[len] == '\0' || p[len] == ':'))
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||
{
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||
/* Found it in the search path, remove old copy */
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||
if (p > *which_path)
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||
p--; /* Back over leading colon */
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||
if (prefix > p - *which_path)
|
||
goto skip_dup; /* Same dir twice in one cmd */
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||
strcpy (p, &p[len+1]); /* Copy from next \0 or : */
|
||
}
|
||
p = index (p, ':');
|
||
if (p != 0)
|
||
++p;
|
||
else
|
||
break;
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||
}
|
||
if (p == 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)
|
||
{
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||
char *temp, c;
|
||
|
||
c = old[prefix];
|
||
old[prefix] = '\0';
|
||
temp = concat (old, ":", name);
|
||
old[prefix] = c;
|
||
*which_path = concat (temp, "", &old[prefix]);
|
||
prefix = strlen (temp);
|
||
free (temp);
|
||
}
|
||
else
|
||
{
|
||
*which_path = concat (name, (old[0]? ":" : old), old);
|
||
prefix = strlen (name);
|
||
}
|
||
free (old);
|
||
old = *which_path;
|
||
}
|
||
}
|
||
skip_dup: ;
|
||
} while (*dirname != '\0');
|
||
}
|
||
|
||
|
||
static void
|
||
source_info ()
|
||
{
|
||
register struct symtab *s = current_source_symtab;
|
||
|
||
if (!s)
|
||
{
|
||
printf("No current source file.\n");
|
||
return;
|
||
}
|
||
printf ("Current source file is %s\n", s->filename);
|
||
if (s->dirname)
|
||
printf ("Compilation directory is %s\n", s->dirname);
|
||
if (s->fullname)
|
||
printf ("Located in %s\n", s->fullname);
|
||
if (s->nlines)
|
||
printf ("Contains %d lines\n", s->nlines);
|
||
|
||
switch (s->language) {
|
||
case language_c:
|
||
printf("Written in the C language.\n");
|
||
/* Add more cases here when -Wswitch complains... */
|
||
case language_unknown:
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* Open a file named STRING, searching path PATH (dir names sep by colons)
|
||
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 ".")
|
||
If FILENAMED_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 (path, try_cwd_first, string, mode, prot, filename_opened)
|
||
char *path;
|
||
int try_cwd_first;
|
||
char *string;
|
||
int mode;
|
||
int prot;
|
||
char **filename_opened;
|
||
{
|
||
register int fd;
|
||
register char *filename;
|
||
register char *p, *p1;
|
||
register int len;
|
||
int alloclen;
|
||
|
||
if (!path)
|
||
path = ".";
|
||
|
||
/* ./foo => foo */
|
||
while (string[0] == '.' && string[1] == '/')
|
||
string += 2;
|
||
|
||
if (try_cwd_first || string[0] == '/')
|
||
{
|
||
filename = string;
|
||
fd = open (filename, mode, prot);
|
||
if (fd >= 0 || string[0] == '/')
|
||
goto done;
|
||
}
|
||
|
||
alloclen = strlen (path) + strlen (string) + 2;
|
||
filename = (char *) alloca (alloclen);
|
||
fd = -1;
|
||
for (p = path; p; p = p1 ? p1 + 1 : 0)
|
||
{
|
||
p1 = (char *) index (p, ':');
|
||
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 = (char *) alloca (alloclen);
|
||
}
|
||
strcpy (filename, current_directory);
|
||
} else {
|
||
/* Normal file name in path -- just use it. */
|
||
strncpy (filename, p, len);
|
||
filename[len] = 0;
|
||
}
|
||
|
||
/* Beware the // my son, the Emacs barfs, the botch that catch... */
|
||
while (len > 1 && filename[len-1] == '/')
|
||
filename[--len] = 0;
|
||
strcat (filename+len, "/");
|
||
strcat (filename, string);
|
||
|
||
fd = open (filename, mode, prot);
|
||
if (fd >= 0) break;
|
||
}
|
||
|
||
done:
|
||
if (filename_opened)
|
||
if (fd < 0)
|
||
*filename_opened = (char *) 0;
|
||
else if (filename[0] == '/')
|
||
*filename_opened = savestring (filename, strlen (filename));
|
||
else
|
||
{
|
||
/* Beware the // my son, the Emacs barfs, the botch that catch... */
|
||
|
||
*filename_opened = concat (current_directory,
|
||
'/' == current_directory[strlen(current_directory)-1]? "": "/",
|
||
filename);
|
||
}
|
||
|
||
return fd;
|
||
}
|
||
|
||
/* Open a source file given a symtab S. Returns a file descriptor
|
||
or negative number for error. */
|
||
int
|
||
open_source_file (s)
|
||
struct symtab *s;
|
||
{
|
||
char *path = source_path;
|
||
char *p;
|
||
int result;
|
||
|
||
/* Quick way out if we already know its full name */
|
||
if (s->fullname)
|
||
{
|
||
result = open (s->fullname, O_RDONLY);
|
||
if (result >= 0)
|
||
return result;
|
||
/* Didn't work -- free old one, try again. */
|
||
free (s->fullname);
|
||
s->fullname = NULL;
|
||
}
|
||
|
||
if (s->dirname != NULL)
|
||
{
|
||
/* Replace a path entry of $cdir with the compilation directory name */
|
||
#define cdir_len 5
|
||
p = strstr (source_path, "$cdir");
|
||
if (p && (p == path || p[-1] == ':')
|
||
&& (p[cdir_len] == ':' || 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 */
|
||
}
|
||
}
|
||
|
||
return openp (path, 0, s->filename, O_RDONLY, 0, &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. */
|
||
|
||
static void
|
||
find_source_lines (s, desc)
|
||
struct symtab *s;
|
||
int desc;
|
||
{
|
||
struct stat st;
|
||
register char *data, *p, *end;
|
||
int nlines = 0;
|
||
int lines_allocated = 1000;
|
||
int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int));
|
||
|
||
if (fstat (desc, &st) < 0)
|
||
perror_with_name (s->filename);
|
||
if (exec_bfd && bfd_get_mtime(exec_bfd) < st.st_mtime)
|
||
printf ("Source file is more recent than executable.\n");
|
||
|
||
#if defined (BROKEN_LARGE_ALLOCA)
|
||
data = (char *) xmalloc (st.st_size);
|
||
make_cleanup (free, data);
|
||
#else
|
||
data = (char *) alloca (st.st_size);
|
||
#endif
|
||
if (myread (desc, data, st.st_size) < 0)
|
||
perror_with_name (s->filename);
|
||
end = data + st.st_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 *) xrealloc (line_charpos,
|
||
sizeof (int) * lines_allocated);
|
||
}
|
||
line_charpos[nlines++] = p - data;
|
||
}
|
||
}
|
||
s->nlines = nlines;
|
||
s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int));
|
||
}
|
||
|
||
/* Return the character position of a line LINE in symtab S.
|
||
Return 0 if anything is invalid. */
|
||
|
||
int
|
||
source_line_charpos (s, line)
|
||
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 (s, chr)
|
||
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;
|
||
}
|
||
|
||
/* 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. */
|
||
|
||
int
|
||
get_filename_and_charpos (s, fullname)
|
||
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 (s, line, mid_statement)
|
||
struct symtab *s;
|
||
int line;
|
||
int mid_statement;
|
||
{
|
||
if (s->line_charpos == 0)
|
||
get_filename_and_charpos (s, (char **)NULL);
|
||
if (s->fullname == 0)
|
||
return 0;
|
||
printf ("\032\032%s:%d:%d:%s:0x%x\n", s->fullname,
|
||
line, s->line_charpos[line - 1],
|
||
mid_statement ? "middle" : "beg",
|
||
get_frame_pc (get_current_frame()));
|
||
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. */
|
||
|
||
void
|
||
print_source_lines (s, line, stopline, noerror)
|
||
struct symtab *s;
|
||
int line, 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;
|
||
|
||
desc = open_source_file (s);
|
||
if (desc < 0)
|
||
{
|
||
if (! noerror) {
|
||
char *name = alloca (strlen (s->filename) + 100);
|
||
sprintf (name, "%s:%d", s->filename, line);
|
||
print_sys_errmsg (name, errno);
|
||
}
|
||
return;
|
||
}
|
||
|
||
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, "r");
|
||
clearerr (stream);
|
||
|
||
while (nlines-- > 0)
|
||
{
|
||
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')
|
||
printf_filtered ("^%c", c + 0100);
|
||
else if (c == 0177)
|
||
printf_filtered ("^?");
|
||
else
|
||
printf_filtered ("%c", c);
|
||
} while (c != '\n' && (c = fgetc (stream)) >= 0);
|
||
}
|
||
|
||
fclose (stream);
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
C++
|
||
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 (sals)
|
||
struct symtabs_and_lines *sals;
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < sals->nelts; ++i)
|
||
printf("file: \"%s\", line number: %d\n",
|
||
sals->sals[i].symtab->filename, sals->sals[i].line);
|
||
}
|
||
|
||
|
||
static void
|
||
list_command (arg, from_tty)
|
||
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 (symtab_list == 0 && partial_symtab_list == 0)
|
||
error ("No symbol table is loaded. Use the \"symbol-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 || !strcmp (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 (!strcmp (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);
|
||
|
||
if (! sals.nelts) return; /* C++ */
|
||
if (sals.nelts > 1)
|
||
{
|
||
ambiguous_line_spec (&sals);
|
||
free (sals.sals);
|
||
return;
|
||
}
|
||
|
||
sal = sals.sals[0];
|
||
free (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);
|
||
else
|
||
sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line);
|
||
if (sals_end.nelts == 0)
|
||
return;
|
||
if (sals_end.nelts > 1)
|
||
{
|
||
ambiguous_line_spec (&sals_end);
|
||
free (sals_end.sals);
|
||
return;
|
||
}
|
||
sal_end = sals_end.sals[0];
|
||
free (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)
|
||
error ("No source file for address 0x%x.", sal.pc);
|
||
sym = find_pc_function (sal.pc);
|
||
if (sym)
|
||
printf ("0x%x is in %s (%s, line %d).\n",
|
||
sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line);
|
||
else
|
||
printf ("0x%x is in %s, line %d.\n",
|
||
sal.pc, 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)
|
||
print_source_lines (sal.symtab,
|
||
max (sal.line - (lines_to_list () / 2), 1),
|
||
sal.line + 5, 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 (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
CORE_ADDR start_pc, end_pc;
|
||
int i;
|
||
|
||
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);
|
||
|
||
/* If this command is repeated with RET,
|
||
turn it into the no-arg variant. */
|
||
if (from_tty)
|
||
*arg = 0;
|
||
}
|
||
|
||
/* 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)
|
||
error ("No source file specified.");
|
||
|
||
if (sal.line > 0
|
||
&& find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc))
|
||
{
|
||
if (start_pc == end_pc)
|
||
printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n",
|
||
sal.line, sal.symtab->filename, start_pc);
|
||
else
|
||
printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n",
|
||
sal.line, sal.symtab->filename, start_pc, end_pc);
|
||
/* 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;
|
||
}
|
||
else
|
||
printf ("Line number %d is out of range for \"%s\".\n",
|
||
sal.line, sal.symtab->filename);
|
||
}
|
||
}
|
||
|
||
/* Commands to search the source file for a regexp. */
|
||
|
||
static void
|
||
forward_search_command (regex, from_tty)
|
||
char *regex;
|
||
int from_tty;
|
||
{
|
||
register int c;
|
||
register int desc;
|
||
register FILE *stream;
|
||
int line = last_line_listed + 1;
|
||
char *msg;
|
||
|
||
msg = (char *) re_comp (regex);
|
||
if (msg)
|
||
error (msg);
|
||
|
||
if (current_source_symtab == 0)
|
||
select_source_symtab (0);
|
||
|
||
/* Search from last_line_listed+1 in current_source_symtab */
|
||
|
||
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, "r");
|
||
clearerr (stream);
|
||
while (1) {
|
||
char buf[4096]; /* Should be reasonable??? */
|
||
register char *p = buf;
|
||
|
||
c = fgetc (stream);
|
||
if (c == EOF)
|
||
break;
|
||
do {
|
||
*p++ = c;
|
||
} while (c != '\n' && (c = fgetc (stream)) >= 0);
|
||
|
||
/* 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);
|
||
current_source_line = max (line - lines_to_list () / 2, 1);
|
||
return;
|
||
}
|
||
line++;
|
||
}
|
||
|
||
printf ("Expression not found\n");
|
||
fclose (stream);
|
||
}
|
||
|
||
static void
|
||
reverse_search_command (regex, from_tty)
|
||
char *regex;
|
||
int from_tty;
|
||
{
|
||
register int c;
|
||
register int desc;
|
||
register FILE *stream;
|
||
int line = last_line_listed - 1;
|
||
char *msg;
|
||
|
||
msg = (char *) re_comp (regex);
|
||
if (msg)
|
||
error (msg);
|
||
|
||
if (current_source_symtab == 0)
|
||
select_source_symtab (0);
|
||
|
||
/* Search from last_line_listed-1 in current_source_symtab */
|
||
|
||
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, "r");
|
||
clearerr (stream);
|
||
while (line > 1)
|
||
{
|
||
char buf[4096]; /* Should be reasonable??? */
|
||
register char *p = buf;
|
||
|
||
c = fgetc (stream);
|
||
if (c == EOF)
|
||
break;
|
||
do {
|
||
*p++ = c;
|
||
} while (c != '\n' && (c = fgetc (stream)) >= 0);
|
||
|
||
/* 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);
|
||
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 ("Expression not found\n");
|
||
fclose (stream);
|
||
return;
|
||
}
|
||
|
||
void
|
||
_initialize_source ()
|
||
{
|
||
current_source_symtab = 0;
|
||
init_source_path ();
|
||
|
||
add_com ("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.");
|
||
|
||
add_info ("directories", directories_info,
|
||
"Current search path for finding source files.\n\
|
||
$cwd in the path means the current working directory.\n\
|
||
$cdir in the path means the compilation directory of the source file.");
|
||
|
||
add_info ("source", source_info,
|
||
"Information about the current source file.");
|
||
|
||
add_info ("line", line_info,
|
||
"Core addresses of the code for a source line.\n\
|
||
Line can be specified as\n\
|
||
LINENUM, to list around that line in current file,\n\
|
||
FILE:LINENUM, to list around that line in that file,\n\
|
||
FUNCTION, to list around beginning of that function,\n\
|
||
FILE:FUNCTION, to distinguish among like-named static functions.\n\
|
||
Default is to describe the last source line that was listed.\n\n\
|
||
This sets the default address for \"x\" to the line's first instruction\n\
|
||
so that \"x/i\" suffices to start examining the machine code.\n\
|
||
The address is also stored as the value of \"$_\".");
|
||
|
||
add_com ("forward-search", class_files, forward_search_command,
|
||
"Search for regular expression (see regex(3)) from last line listed.");
|
||
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.");
|
||
|
||
add_com ("list", class_files, list_command,
|
||
"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.");
|
||
add_com_alias ("l", "list", class_files, 0);
|
||
}
|
||
|