aboutsummaryrefslogtreecommitdiff
path: root/gdb/source.c
diff options
context:
space:
mode:
authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:35:26 +0000
commitc906108c21474dfb4ed285bcc0ac6fe02cd400cc (patch)
treea0015aa5cedc19ccbab307251353a41722a3ae13 /gdb/source.c
parentcd946cff9ede3f30935803403f06f6ed30cad136 (diff)
downloadgdb-c906108c21474dfb4ed285bcc0ac6fe02cd400cc.zip
gdb-c906108c21474dfb4ed285bcc0ac6fe02cd400cc.tar.gz
gdb-c906108c21474dfb4ed285bcc0ac6fe02cd400cc.tar.bz2
Initial creation of sourceware repositorygdb-4_18-branchpoint
Diffstat (limited to 'gdb/source.c')
-rw-r--r--gdb/source.c1724
1 files changed, 1724 insertions, 0 deletions
diff --git a/gdb/source.c b/gdb/source.c
new file mode 100644
index 0000000..9fe9742
--- /dev/null
+++ b/gdb/source.c
@@ -0,0 +1,1724 @@
+/* List lines of source files for GDB, the GNU debugger.
+ Copyright 1986, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 1998
+ 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 "gdbcmd.h"
+#include "frame.h"
+#include "value.h"
+
+#include <sys/types.h>
+#include "gdb_string.h"
+#include "gdb_stat.h"
+#include <fcntl.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include "gdbcore.h"
+#include "gnu-regex.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "annotate.h"
+#include "gdbtypes.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) */
+
+/* Forward declarations */
+
+int open_source_file PARAMS ((struct symtab *));
+
+void find_source_lines PARAMS ((struct symtab *, int));
+
+/* Prototypes for exported functions. */
+
+void _initialize_source PARAMS ((void));
+
+/* Prototypes for local functions. */
+
+static int get_filename_and_charpos PARAMS ((struct symtab *, char **));
+
+static void reverse_search_command PARAMS ((char *, int));
+
+static void forward_search_command PARAMS ((char *, int));
+
+static void line_info PARAMS ((char *, int));
+
+static void list_command PARAMS ((char *, int));
+
+static void ambiguous_line_spec PARAMS ((struct symtabs_and_lines *));
+
+static void source_info PARAMS ((char *, int));
+
+static void show_directories PARAMS ((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. */
+
+struct symtab *current_source_symtab;
+
+/* Default next line to list. */
+
+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;
+
+
+/* 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 (s)
+ register 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", 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);
+ if (current_source_symtab)
+ return;
+ }
+
+ /* All right; find the last file in the symtab list (ignoring .h's). */
+
+ current_source_line = 1;
+
+ 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 && (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 && (STREQ (&name[len - 2], ".h"))))
+ {
+ cs_pst = ps;
+ }
+ }
+ }
+ 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);
+ }
+ }
+ if (current_source_symtab)
+ return;
+
+ error ("Can't find a default source file");
+}
+
+static void
+show_directories (ignore, from_tty)
+ 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 ()
+{
+ register struct symtab *s;
+ register struct objfile *objfile;
+
+ for (objfile = object_files; objfile != NULL; objfile = objfile -> next)
+ {
+ for (s = objfile -> symtabs; s != NULL; s = s -> next)
+ {
+ if (s -> line_charpos != NULL)
+ {
+ mfree (objfile -> md, s -> line_charpos);
+ s -> line_charpos = NULL;
+ }
+ if (s -> fullname != NULL)
+ {
+ mfree (objfile -> md, s -> fullname);
+ s -> fullname = NULL;
+ }
+ }
+ }
+}
+
+void
+init_source_path ()
+{
+ char buf[20];
+
+ sprintf (buf, "$cdir%c$cwd", DIRNAME_SEPARATOR);
+ source_path = strsave (buf);
+ forget_cached_source_info ();
+}
+
+/* Add zero or more directories to the front of the source path. */
+
+void
+directory_command (dirname, from_tty)
+ char *dirname;
+ int from_tty;
+{
+ dont_repeat ();
+ /* FIXME, this goes to "delete dir"... */
+ if (dirname == 0)
+ {
+ if (query ("Reinitialize source path to empty? "))
+ {
+ free (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 (dirname, which_path)
+ char *dirname;
+ char **which_path;
+{
+ char *old = *which_path;
+ int prefix = 0;
+
+ if (dirname == 0)
+ return;
+
+ dirname = strsave (dirname);
+ make_cleanup (free, dirname);
+
+ do
+ {
+ char *name = dirname;
+ register char *p;
+ struct stat st;
+
+ {
+ char *separator = strchr (name, DIRNAME_SEPARATOR);
+ char *space = strchr (name, ' ');
+ char *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;
+ }
+ }
+
+#ifndef _WIN32
+ /* On win32 h:\ is different to h: */
+ if (SLASH_P (p[-1]))
+ /* Sigh. "foo/" => "foo" */
+ --p;
+#endif
+ *p = '\0';
+
+ while (p[-1] == '.')
+ {
+ if (p - name == 1)
+ {
+ /* "." => getwd (). */
+ name = current_directory;
+ goto append;
+ }
+ else if (SLASH_P (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);
+ else if (!ROOTED_P (name) && name[0] != '$')
+ name = concat (current_directory, SLASH_STRING, name, NULL);
+ else
+ name = savestring (name, p - name);
+ make_cleanup (free, name);
+
+ /* Unless it's a variable, check existence. */
+ if (name[0] != '$') {
+ /* 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)
+ {
+ 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);
+ free (temp);
+ }
+ else
+ {
+ *which_path = concat (name, (old[0] ? tinybuf : old), old, NULL);
+ prefix = strlen (name);
+ }
+ free (old);
+ old = *which_path;
+ }
+ }
+ skip_dup: ;
+ } while (*dirname != '\0');
+}
+
+
+static void
+source_info (ignore, from_tty)
+ 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 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 = ".";
+
+#ifdef _WIN32
+ mode |= O_BINARY;
+#endif
+
+ if (try_cwd_first || SLASH_P (string[0]))
+ {
+ int i;
+ filename = string;
+ fd = open (filename, mode, prot);
+ if (fd >= 0)
+ goto done;
+ for (i = 0; string[i]; i++)
+ if (SLASH_P (string[i]))
+ goto done;
+ }
+
+ /* ./foo => foo */
+ while (string[0] == '.' && SLASH_P (string[1]))
+ string += 2;
+
+ alloclen = strlen (path) + strlen (string) + 2;
+ filename = (char *) alloca (alloclen);
+ fd = -1;
+ for (p = path; p; p = p1 ? p1 + 1 : 0)
+ {
+ p1 = (char *) 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 = (char *) 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 && SLASH_P (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 = (char *) 0;
+ else if (ROOTED_P (filename))
+ *filename_opened = savestring (filename, strlen (filename));
+ else
+ {
+ /* Beware the // my son, the Emacs barfs, the botch that catch... */
+
+ *filename_opened = concat (current_directory,
+ SLASH_CHAR
+ == current_directory[strlen(current_directory)-1]
+ ? "": SLASH_STRING,
+ filename, NULL);
+ }
+ }
+#ifdef MPW
+ /* This is a debugging hack that can go away when all combinations
+ of Mac and Unix names are handled reasonably. */
+ {
+ extern int debug_openp;
+
+ if (debug_openp)
+ {
+ printf("openp on %s, path %s mode %d prot %d\n returned %d",
+ string, path, mode, prot, fd);
+ if (*filename_opened)
+ printf(" (filename is %s)", *filename_opened);
+ printf("\n");
+ }
+ }
+#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 (filename, full_pathname)
+ 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 (s)
+ struct symtab *s;
+{
+ char *path = source_path;
+ 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 = basename (s->filename);
+ if (p != s->filename)
+ result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
+ }
+#ifdef MPW
+ if (result < 0)
+ {
+ /* Didn't work. Try using just the MPW basename. */
+ p = (char *) mpw_basename (s->filename);
+ if (p != s->filename)
+ result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
+ }
+ if (result < 0)
+ {
+ /* Didn't work. Try using the mixed Unix/MPW basename. */
+ p = (char *) mpw_mixed_basename (s->filename);
+ if (p != s->filename)
+ result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
+ }
+#endif /* MPW */
+
+ if (result >= 0)
+ {
+ fullname = s->fullname;
+ s->fullname = mstrsave (s->objfile->md, s->fullname);
+ free (fullname);
+ }
+ return result;
+}
+
+/* Return the path to the source file associated with symtab. Returns NULL
+ if no symtab. */
+
+char *
+symtab_to_filename (s)
+ 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 (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;
+ 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)
+ {
+ if (tui_version)
+ printf_filtered ("\n");
+ 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 (free, 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 (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;
+}
+
+#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 (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, pc)
+ 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 (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;
+
+
+ /* 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;
+ }
+
+ 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
+ printf_filtered ("%d\tin %s\n", line, s->filename);
+
+ 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)
+ {
+ 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);
+ }
+
+ 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 (s, line, stopline, noerror)
+ struct symtab *s;
+ int line, stopline, noerror;
+{
+#if defined(TUI)
+ if (!tui_version ||
+ m_winPtrIsNull(srcWin) || !srcWin->generic.isVisible )
+ print_source_lines_base(s, line, stopline, noerror);
+ else
+ {
+ TuiGenWinInfoPtr locator = locatorWinInfoPtr();
+ extern void tui_vAddWinToLayout PARAMS ((va_list));
+ extern void tui_vUpdateSourceWindowsWithLine PARAMS ((va_list));
+
+ /* Regardless of whether we can open the file,
+ set current_source_symtab. */
+ current_source_symtab = s;
+ current_source_line = line;
+ first_line_listed = line;
+
+ /* make sure that the source window is displayed */
+ tuiDo((TuiOpaqueFuncPtr)tui_vAddWinToLayout, SRC_WIN);
+
+ tuiDo((TuiOpaqueFuncPtr)tui_vUpdateSourceWindowsWithLine, s, line);
+ tuiDo((TuiOpaqueFuncPtr)tui_vUpdateLocatorFilename, s->filename);
+ }
+#else
+ print_source_lines_base(s, line, stopline, noerror);
+#endif
+}
+
+
+
+/* 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_filtered("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 (!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);
+ 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, 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);
+ 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)
+ /* 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)
+ if (lines_to_list % 2 == 0)
+ print_source_lines (sal.symtab,
+ max (sal.line - (lines_to_list / 2), 1),
+ sal.line + (lines_to_list / 2), 0);
+ else
+ /* If lines_to_list is odd, then we round down in
+ * one of the lines_to_list/2 computations, round up in
+ * the other, so the total window size around the specified
+ * line comes out right.
+ */
+ print_source_lines (sal.symtab,
+ max (sal.line - (lines_to_list / 2), 1),
+ sal.line + ((1+lines_to_list) / 2), 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;
+
+ 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);
+ }
+ free (sals.sals);
+}
+
+/* Commands to search the source file for a regexp. */
+
+/* ARGSUSED */
+static void
+forward_search_command (regex, from_tty)
+ char *regex;
+ int from_tty;
+{
+ register int c;
+ register int desc;
+ register FILE *stream;
+ int line;
+ char *msg;
+
+#if defined(TUI)
+ /*
+ ** If this is the TUI, search from the first line displayed in
+ ** the source window, otherwise, search from last_line_listed+1
+ ** in current_source_symtab
+ */
+ if (!tui_version)
+ line = last_line_listed;
+ else
+ {
+ if (srcWin->generic.isVisible && srcWin->generic.contentSize > 0)
+ line = ((TuiWinContent)
+ srcWin->generic.content)[0]->whichElement.source.lineOrAddr.lineNo;
+ else
+ {
+ printf_filtered("No source displayed.\nExpression not found.\n");
+ return;
+ }
+ }
+ line++;
+#else
+ line = last_line_listed + 1;
+#endif
+
+ 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);
+
+ /* we now have a source line in buf, null terminate and match */
+ *p = 0;
+ if (re_exec (buf) > 0)
+ {
+ /* Match! */
+ fclose (stream);
+ if (tui_version)
+ print_source_lines_base (current_source_symtab, line, line+1, 0);
+ 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 (regex, from_tty)
+ char *regex;
+ int from_tty;
+{
+ register int c;
+ register int desc;
+ register FILE *stream;
+ int line;
+ char *msg;
+#if defined(TUI)
+ /*
+ ** If this is the TUI, search from the first line displayed in
+ ** the source window, otherwise, search from last_line_listed-1
+ ** in current_source_symtab
+ */
+ if (!tui_version)
+ line = last_line_listed;
+ else
+ {
+ if (srcWin->generic.isVisible && srcWin->generic.contentSize > 0)
+ line = ((TuiWinContent)
+ srcWin->generic.content)[0]->whichElement.source.lineOrAddr.lineNo;
+ else
+ {
+ printf_filtered("No source displayed.\nExpression not found.\n");
+ return;
+ }
+ }
+ line--;
+#else
+ line = last_line_listed - 1;
+#endif
+
+ 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);
+
+ /* We now have a source line in buf; null terminate and match. */
+ *p = 0;
+ if (re_exec (buf) > 0)
+ {
+ /* Match! */
+ fclose (stream);
+ if (tui_version)
+ print_source_lines_base (current_source_symtab, line, line+1, 0);
+ 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 ()
+{
+ 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);
+}