982526a134
* utils.c (msavestring, mstrsave): Remove functions. * objfiles.c (allocate_objfile): Use xstrdup instead of mstrsave. * solib-sunos.c (allocate_rt_common_objfile): Use xstrdup instead of mstrsave. * source.c (find_and_open_source): Use xstrdup instead of mstrsave.
1666 lines
43 KiB
C
1666 lines
43 KiB
C
/* List lines of source files for GDB, the GNU debugger.
|
||
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
|
||
1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "symtab.h"
|
||
#include "expression.h"
|
||
#include "language.h"
|
||
#include "command.h"
|
||
#include "source.h"
|
||
#include "gdbcmd.h"
|
||
#include "frame.h"
|
||
#include "value.h"
|
||
|
||
#include <sys/types.h>
|
||
#include "gdb_string.h"
|
||
#include "gdb_stat.h"
|
||
#include <fcntl.h>
|
||
#include "gdbcore.h"
|
||
#include "gdb_regex.h"
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "annotate.h"
|
||
#include "gdbtypes.h"
|
||
#include "linespec.h"
|
||
#include "filenames.h" /* for DOSish file names */
|
||
#include "completer.h"
|
||
#include "ui-out.h"
|
||
#include "readline/readline.h"
|
||
|
||
#ifdef CRLF_SOURCE_FILES
|
||
|
||
/* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the
|
||
host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is
|
||
much faster than defining LSEEK_NOT_LINEAR. */
|
||
|
||
#ifndef O_BINARY
|
||
#define O_BINARY 0
|
||
#endif
|
||
|
||
#define OPEN_MODE (O_RDONLY | O_BINARY)
|
||
#define FDOPEN_MODE FOPEN_RB
|
||
|
||
#else /* ! defined (CRLF_SOURCE_FILES) */
|
||
|
||
#define OPEN_MODE O_RDONLY
|
||
#define FDOPEN_MODE FOPEN_RT
|
||
|
||
#endif /* ! defined (CRLF_SOURCE_FILES) */
|
||
|
||
/* Prototypes for exported functions. */
|
||
|
||
void _initialize_source (void);
|
||
|
||
/* Prototypes for local functions. */
|
||
|
||
static int get_filename_and_charpos (struct symtab *, char **);
|
||
|
||
static void reverse_search_command (char *, int);
|
||
|
||
static void forward_search_command (char *, int);
|
||
|
||
static void line_info (char *, int);
|
||
|
||
static void source_info (char *, int);
|
||
|
||
static void show_directories (char *, int);
|
||
|
||
/* Path of directories to search for source files.
|
||
Same format as the PATH environment variable's value. */
|
||
|
||
char *source_path;
|
||
|
||
/* Symtab of default file for listing lines of. */
|
||
|
||
static struct symtab *current_source_symtab;
|
||
|
||
/* Default next line to list. */
|
||
|
||
static int current_source_line;
|
||
|
||
/* Default number of lines to print with commands like "list".
|
||
This is based on guessing how many long (i.e. more than chars_per_line
|
||
characters) lines there will be. To be completely correct, "list"
|
||
and friends should be rewritten to count characters and see where
|
||
things are wrapping, but that would be a fair amount of work. */
|
||
|
||
int lines_to_list = 10;
|
||
|
||
/* 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;
|
||
|
||
/* Saves the name of the last source file visited and a possible error code.
|
||
Used to prevent repeating annoying "No such file or directories" msgs */
|
||
|
||
static struct symtab *last_source_visited = NULL;
|
||
static int last_source_error = 0;
|
||
|
||
/* Return the first line listed by print_source_lines.
|
||
Used by command interpreters to request listing from
|
||
a previous point. */
|
||
|
||
int
|
||
get_first_line_listed (void)
|
||
{
|
||
return first_line_listed;
|
||
}
|
||
|
||
/* Return the default number of lines to print with commands like the
|
||
cli "list". The caller of print_source_lines must use this to
|
||
calculate the end line and use it in the call to print_source_lines
|
||
as it does not automatically use this value. */
|
||
|
||
int
|
||
get_lines_to_list (void)
|
||
{
|
||
return lines_to_list;
|
||
}
|
||
|
||
/* Return the current source file for listing and next line to list.
|
||
NOTE: The returned sal pc and end fields are not valid. */
|
||
|
||
struct symtab_and_line
|
||
get_current_source_symtab_and_line (void)
|
||
{
|
||
struct symtab_and_line cursal;
|
||
|
||
cursal.symtab = current_source_symtab;
|
||
cursal.line = current_source_line;
|
||
cursal.pc = 0;
|
||
cursal.end = 0;
|
||
|
||
return cursal;
|
||
}
|
||
|
||
/* If the current source file for listing is not set, try and get a default.
|
||
Usually called before get_current_source_symtab_and_line() is called.
|
||
It may err out if a default cannot be determined.
|
||
We must be cautious about where it is called, as it can recurse as the
|
||
process of determining a new default may call the caller!
|
||
Use get_current_source_symtab_and_line only to get whatever
|
||
we have without erroring out or trying to get a default. */
|
||
|
||
void
|
||
set_default_source_symtab_and_line (void)
|
||
{
|
||
struct symtab_and_line cursal;
|
||
|
||
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)
|
||
select_source_symtab (0);
|
||
}
|
||
|
||
/* Return the current default file for listing and next line to list
|
||
(the returned sal pc and end fields are not valid.)
|
||
and set the current default to whatever is in SAL.
|
||
NOTE: The returned sal pc and end fields are not valid. */
|
||
|
||
struct symtab_and_line
|
||
set_current_source_symtab_and_line (const struct symtab_and_line *sal)
|
||
{
|
||
struct symtab_and_line cursal;
|
||
|
||
cursal.symtab = current_source_symtab;
|
||
cursal.line = current_source_line;
|
||
|
||
current_source_symtab = sal->symtab;
|
||
current_source_line = sal->line;
|
||
cursal.pc = 0;
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||
cursal.end = 0;
|
||
|
||
return cursal;
|
||
}
|
||
|
||
/* Reset any information stored about a default file and line to print. */
|
||
|
||
void
|
||
clear_current_source_symtab_and_line (void)
|
||
{
|
||
current_source_symtab = 0;
|
||
current_source_line = 0;
|
||
}
|
||
|
||
/* Set the source file default for the "list" command to be S.
|
||
|
||
If S is NULL, and we don't have a default, find one. This
|
||
should only be called when the user actually tries to use the
|
||
default, since we produce an error if we can't find a reasonable
|
||
default. Also, since this can cause symbols to be read, doing it
|
||
before we need to would make things slower than necessary. */
|
||
|
||
void
|
||
select_source_symtab (struct symtab *s)
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
struct partial_symtab *ps;
|
||
struct partial_symtab *cs_pst = 0;
|
||
struct objfile *ofp;
|
||
|
||
if (s)
|
||
{
|
||
current_source_symtab = s;
|
||
current_source_line = 1;
|
||
return;
|
||
}
|
||
|
||
if (current_source_symtab)
|
||
return;
|
||
|
||
/* Make the default place to list be the function `main'
|
||
if one exists. */
|
||
if (lookup_symbol (main_name (), 0, VAR_DOMAIN, 0, NULL))
|
||
{
|
||
sals = decode_line_spec (main_name (), 1);
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||
sal = sals.sals[0];
|
||
xfree (sals.sals);
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||
current_source_symtab = sal.symtab;
|
||
current_source_line = max (sal.line - (lines_to_list - 1), 1);
|
||
if (current_source_symtab)
|
||
return;
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}
|
||
|
||
/* All right; find the last file in the symtab list (ignoring .h's). */
|
||
|
||
current_source_line = 1;
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||
|
||
for (ofp = object_files; ofp != NULL; ofp = ofp->next)
|
||
{
|
||
for (s = ofp->symtabs; s; s = s->next)
|
||
{
|
||
char *name = s->filename;
|
||
int len = strlen (name);
|
||
if (!(len > 2 && (DEPRECATED_STREQ (&name[len - 2], ".h"))))
|
||
{
|
||
current_source_symtab = s;
|
||
}
|
||
}
|
||
}
|
||
if (current_source_symtab)
|
||
return;
|
||
|
||
/* Howabout the partial symbol tables? */
|
||
|
||
for (ofp = object_files; ofp != NULL; ofp = ofp->next)
|
||
{
|
||
for (ps = ofp->psymtabs; ps != NULL; ps = ps->next)
|
||
{
|
||
char *name = ps->filename;
|
||
int len = strlen (name);
|
||
if (!(len > 2 && (DEPRECATED_STREQ (&name[len - 2], ".h"))))
|
||
{
|
||
cs_pst = ps;
|
||
}
|
||
}
|
||
}
|
||
if (cs_pst)
|
||
{
|
||
if (cs_pst->readin)
|
||
{
|
||
internal_error (__FILE__, __LINE__,
|
||
"select_source_symtab: "
|
||
"readin pst found and no symtabs.");
|
||
}
|
||
else
|
||
{
|
||
current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst);
|
||
}
|
||
}
|
||
if (current_source_symtab)
|
||
return;
|
||
|
||
error ("Can't find a default source file");
|
||
}
|
||
|
||
static void
|
||
show_directories (char *ignore, int from_tty)
|
||
{
|
||
puts_filtered ("Source directories searched: ");
|
||
puts_filtered (source_path);
|
||
puts_filtered ("\n");
|
||
}
|
||
|
||
/* 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 (void)
|
||
{
|
||
struct symtab *s;
|
||
struct objfile *objfile;
|
||
struct partial_symtab *pst;
|
||
|
||
for (objfile = object_files; objfile != NULL; objfile = objfile->next)
|
||
{
|
||
for (s = objfile->symtabs; s != NULL; s = s->next)
|
||
{
|
||
if (s->line_charpos != NULL)
|
||
{
|
||
xfree (s->line_charpos);
|
||
s->line_charpos = NULL;
|
||
}
|
||
if (s->fullname != NULL)
|
||
{
|
||
xfree (s->fullname);
|
||
s->fullname = NULL;
|
||
}
|
||
}
|
||
|
||
ALL_OBJFILE_PSYMTABS (objfile, pst)
|
||
{
|
||
if (pst->fullname != NULL)
|
||
{
|
||
xfree (pst->fullname);
|
||
pst->fullname = NULL;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
init_source_path (void)
|
||
{
|
||
char buf[20];
|
||
|
||
sprintf (buf, "$cdir%c$cwd", DIRNAME_SEPARATOR);
|
||
source_path = xstrdup (buf);
|
||
forget_cached_source_info ();
|
||
}
|
||
|
||
void
|
||
init_last_source_visited (void)
|
||
{
|
||
last_source_visited = NULL;
|
||
}
|
||
|
||
/* Add zero or more directories to the front of the source path. */
|
||
|
||
void
|
||
directory_command (char *dirname, int from_tty)
|
||
{
|
||
dont_repeat ();
|
||
/* FIXME, this goes to "delete dir"... */
|
||
if (dirname == 0)
|
||
{
|
||
if (from_tty && query ("Reinitialize source path to empty? "))
|
||
{
|
||
xfree (source_path);
|
||
init_source_path ();
|
||
}
|
||
}
|
||
else
|
||
{
|
||
mod_path (dirname, &source_path);
|
||
last_source_visited = NULL;
|
||
}
|
||
if (from_tty)
|
||
show_directories ((char *) 0, from_tty);
|
||
forget_cached_source_info ();
|
||
}
|
||
|
||
/* Add zero or more directories to the front of an arbitrary path. */
|
||
|
||
void
|
||
mod_path (char *dirname, char **which_path)
|
||
{
|
||
add_path (dirname, which_path, 1);
|
||
}
|
||
|
||
/* Workhorse of mod_path. Takes an extra argument to determine
|
||
if dirname should be parsed for separators that indicate multiple
|
||
directories. This allows for interfaces that pre-parse the dirname
|
||
and allow specification of traditional separator characters such
|
||
as space or tab. */
|
||
|
||
void
|
||
add_path (char *dirname, char **which_path, int parse_separators)
|
||
{
|
||
char *old = *which_path;
|
||
int prefix = 0;
|
||
|
||
if (dirname == 0)
|
||
return;
|
||
|
||
dirname = xstrdup (dirname);
|
||
make_cleanup (xfree, dirname);
|
||
|
||
do
|
||
{
|
||
char *name = dirname;
|
||
char *p;
|
||
struct stat st;
|
||
|
||
{
|
||
char *separator = NULL;
|
||
char *space = NULL;
|
||
char *tab = NULL;
|
||
|
||
if (parse_separators)
|
||
{
|
||
separator = strchr (name, DIRNAME_SEPARATOR);
|
||
space = strchr (name, ' ');
|
||
tab = strchr (name, '\t');
|
||
}
|
||
|
||
if (separator == 0 && space == 0 && tab == 0)
|
||
p = dirname = name + strlen (name);
|
||
else
|
||
{
|
||
p = 0;
|
||
if (separator != 0 && (p == 0 || separator < p))
|
||
p = separator;
|
||
if (space != 0 && (p == 0 || space < p))
|
||
p = space;
|
||
if (tab != 0 && (p == 0 || tab < p))
|
||
p = tab;
|
||
dirname = p + 1;
|
||
while (*dirname == DIRNAME_SEPARATOR
|
||
|| *dirname == ' '
|
||
|| *dirname == '\t')
|
||
++dirname;
|
||
}
|
||
}
|
||
|
||
if (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */
|
||
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
||
/* On MS-DOS and MS-Windows, h:\ is different from h: */
|
||
&& !(p == name + 3 && name[1] == ':') /* "d:/" */
|
||
#endif
|
||
&& IS_DIR_SEPARATOR (p[-1]))
|
||
/* 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:." */
|
||
name = concat (name, ".", NULL);
|
||
#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:
|
||
{
|
||
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)
|
||
{
|
||
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);
|
||
printf_filtered ("%s preprocessor macro info.\n",
|
||
s->macro_table ? "Includes" : "Does not include");
|
||
}
|
||
|
||
|
||
/* Return True if the file NAME exists and is a regular file */
|
||
static int
|
||
is_regular_file (const char *name)
|
||
{
|
||
struct stat st;
|
||
const int status = stat (name, &st);
|
||
|
||
/* Stat should never fail except when the file does not exist.
|
||
If stat fails, analyze the source of error and return True
|
||
unless the file does not exist, to avoid returning false results
|
||
on obscure systems where stat does not work as expected.
|
||
*/
|
||
if (status != 0)
|
||
return (errno != ENOENT);
|
||
|
||
return S_ISREG (st.st_mode);
|
||
}
|
||
|
||
/* 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.
|
||
|
||
OPTS specifies the function behaviour in specific cases.
|
||
|
||
If OPF_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 OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
|
||
searched in path (we usually want this for source files but not for
|
||
executables).
|
||
|
||
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 opts, const char *string,
|
||
int mode, int prot,
|
||
char **filename_opened)
|
||
{
|
||
int fd;
|
||
char *filename;
|
||
const char *p;
|
||
const char *p1;
|
||
int len;
|
||
int alloclen;
|
||
|
||
if (!path)
|
||
path = ".";
|
||
|
||
#if defined(_WIN32) || defined(__CYGWIN__)
|
||
mode |= O_BINARY;
|
||
#endif
|
||
|
||
if ((opts & OPF_TRY_CWD_FIRST) || IS_ABSOLUTE_PATH (string))
|
||
{
|
||
int i;
|
||
|
||
if (is_regular_file (string))
|
||
{
|
||
filename = alloca (strlen (string) + 1);
|
||
strcpy (filename, string);
|
||
fd = open (filename, mode, prot);
|
||
if (fd >= 0)
|
||
goto done;
|
||
}
|
||
else
|
||
{
|
||
filename = NULL;
|
||
fd = -1;
|
||
}
|
||
|
||
if (!(opts & OPF_SEARCH_IN_PATH))
|
||
for (i = 0; string[i]; i++)
|
||
if (IS_DIR_SEPARATOR (string[i]))
|
||
goto done;
|
||
}
|
||
|
||
/* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
|
||
while (IS_DIR_SEPARATOR(string[0]))
|
||
string++;
|
||
|
||
/* ./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);
|
||
|
||
if (is_regular_file (filename))
|
||
{
|
||
fd = open (filename, mode);
|
||
if (fd >= 0)
|
||
break;
|
||
}
|
||
}
|
||
|
||
done:
|
||
if (filename_opened)
|
||
{
|
||
/* If a file was opened, canonicalize its filename. Use xfullpath
|
||
rather than gdb_realpath to avoid resolving the basename part
|
||
of filenames when the associated file is a symbolic link. This
|
||
fixes a potential inconsistency between the filenames known to
|
||
GDB and the filenames it prints in the annotations. */
|
||
if (fd < 0)
|
||
*filename_opened = NULL;
|
||
else if (IS_ABSOLUTE_PATH (filename))
|
||
*filename_opened = xfullpath (filename);
|
||
else
|
||
{
|
||
/* Beware the // my son, the Emacs barfs, the botch that catch... */
|
||
|
||
char *f = concat (current_directory,
|
||
IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
|
||
? "" : SLASH_STRING,
|
||
filename, NULL);
|
||
*filename_opened = xfullpath (f);
|
||
xfree (f);
|
||
}
|
||
}
|
||
|
||
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, OPF_TRY_CWD_FIRST | OPF_SEARCH_IN_PATH, filename,
|
||
O_RDONLY, 0, full_pathname);
|
||
if (fd < 0)
|
||
{
|
||
*full_pathname = NULL;
|
||
return 0;
|
||
}
|
||
|
||
close (fd);
|
||
return 1;
|
||
}
|
||
|
||
/* This function is capable of finding the absolute path to a
|
||
source file, and opening it, provided you give it an
|
||
OBJFILE and FILENAME. Both the DIRNAME and FULLNAME are only
|
||
added suggestions on where to find the file.
|
||
|
||
OBJFILE should be the objfile associated with a psymtab or symtab.
|
||
FILENAME should be the filename to open.
|
||
DIRNAME is the compilation directory of a particular source file.
|
||
Only some debug formats provide this info.
|
||
FULLNAME can be the last known absolute path to the file in question.
|
||
|
||
On Success
|
||
A valid file descriptor is returned. ( the return value is positive )
|
||
FULLNAME is set to the absolute path to the file just opened.
|
||
|
||
On Failure
|
||
A non valid file descriptor is returned. ( the return value is negitive )
|
||
FULLNAME is set to NULL. */
|
||
int
|
||
find_and_open_source (struct objfile *objfile,
|
||
const char *filename,
|
||
const char *dirname,
|
||
char **fullname)
|
||
{
|
||
char *path = source_path;
|
||
const char *p;
|
||
int result;
|
||
|
||
/* Quick way out if we already know its full name */
|
||
if (*fullname)
|
||
{
|
||
result = open (*fullname, OPEN_MODE);
|
||
if (result >= 0)
|
||
return result;
|
||
/* Didn't work -- free old one, try again. */
|
||
xfree (*fullname);
|
||
*fullname = NULL;
|
||
}
|
||
|
||
if (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 (dirname) + 1);
|
||
len = p - source_path;
|
||
strncpy (path, source_path, len); /* Before $cdir */
|
||
strcpy (path + len, dirname); /* new stuff */
|
||
strcat (path + len, source_path + len + cdir_len); /* After $cdir */
|
||
}
|
||
}
|
||
|
||
result = openp (path, OPF_SEARCH_IN_PATH, filename, OPEN_MODE, 0, fullname);
|
||
if (result < 0)
|
||
{
|
||
/* Didn't work. Try using just the basename. */
|
||
p = lbasename (filename);
|
||
if (p != filename)
|
||
result = openp (path, OPF_SEARCH_IN_PATH, p, OPEN_MODE, 0, fullname);
|
||
}
|
||
|
||
if (result >= 0)
|
||
{
|
||
char *tmp_fullname;
|
||
tmp_fullname = *fullname;
|
||
*fullname = xstrdup (tmp_fullname);
|
||
xfree (tmp_fullname);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/* Open a source file given a symtab S. Returns a file descriptor or
|
||
negative number for error.
|
||
|
||
This function is a convience function to find_and_open_source. */
|
||
|
||
int
|
||
open_source_file (struct symtab *s)
|
||
{
|
||
if (!s)
|
||
return -1;
|
||
|
||
return find_and_open_source (s->objfile, s->filename, s->dirname,
|
||
&s->fullname);
|
||
}
|
||
|
||
/* Finds the fullname that a symtab represents.
|
||
|
||
If this functions finds the fullname, it will save it in ps->fullname
|
||
and it will also return the value.
|
||
|
||
If this function fails to find the file that this symtab represents,
|
||
NULL will be returned and ps->fullname will be set to NULL. */
|
||
char *
|
||
symtab_to_fullname (struct symtab *s)
|
||
{
|
||
int r;
|
||
|
||
if (!s)
|
||
return NULL;
|
||
|
||
/* Don't check s->fullname here, the file could have been
|
||
deleted/moved/..., look for it again */
|
||
r = find_and_open_source (s->objfile, s->filename, s->dirname,
|
||
&s->fullname);
|
||
|
||
if (r)
|
||
{
|
||
close (r);
|
||
return s->fullname;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Finds the fullname that a partial_symtab represents.
|
||
|
||
If this functions finds the fullname, it will save it in ps->fullname
|
||
and it will also return the value.
|
||
|
||
If this function fails to find the file that this partial_symtab represents,
|
||
NULL will be returned and ps->fullname will be set to NULL. */
|
||
char *
|
||
psymtab_to_fullname (struct partial_symtab *ps)
|
||
{
|
||
int r;
|
||
|
||
if (!ps)
|
||
return NULL;
|
||
|
||
/* Don't check ps->fullname here, the file could have been
|
||
deleted/moved/..., look for it again */
|
||
r = find_and_open_source (ps->objfile, ps->filename, ps->dirname,
|
||
&ps->fullname);
|
||
|
||
if (r)
|
||
{
|
||
close (r);
|
||
return ps->fullname;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* 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;
|
||
char *data, *p, *end;
|
||
int nlines = 0;
|
||
int lines_allocated = 1000;
|
||
int *line_charpos;
|
||
long mtime = 0;
|
||
int size;
|
||
|
||
line_charpos = (int *) xmalloc (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 *) xrealloc ((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 *) xrealloc ((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 *) xrealloc ((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 (struct symtab *s, int chr)
|
||
{
|
||
int line = 0;
|
||
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)
|
||
{
|
||
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)
|
||
{
|
||
int c;
|
||
int desc;
|
||
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;
|
||
|
||
/* If printing of source lines is disabled, just print file and line number */
|
||
if (ui_out_test_flags (uiout, ui_source_list))
|
||
{
|
||
/* 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;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
desc = -1;
|
||
noerror = 1;
|
||
}
|
||
|
||
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
|
||
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");
|
||
|
||
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)
|
||
{
|
||
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);
|
||
}
|
||
|
||
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 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. */
|
||
|
||
static void
|
||
forward_search_command (char *regex, int from_tty)
|
||
{
|
||
int c;
|
||
int desc;
|
||
FILE *stream;
|
||
int line;
|
||
char *msg;
|
||
|
||
line = last_line_listed + 1;
|
||
|
||
msg = (char *) re_comp (regex);
|
||
if (msg)
|
||
error ("%s", 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;
|
||
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);
|
||
}
|
||
|
||
static void
|
||
reverse_search_command (char *regex, int from_tty)
|
||
{
|
||
int c;
|
||
int desc;
|
||
FILE *stream;
|
||
int line;
|
||
char *msg;
|
||
|
||
line = last_line_listed - 1;
|
||
|
||
msg = (char *) re_comp (regex);
|
||
if (msg)
|
||
error ("%s", 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??? */
|
||
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);
|
||
|
||
set_cmd_completer (c, 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);
|
||
}
|
||
|
||
deprecated_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);
|
||
}
|