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authorJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
committerJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
commit831c851165e112139af1265f294e198401814c1f (patch)
tree5f155fecb9b690be9c428e822d519c2710fefd47 /gdb/source.c
parent7a67dd45ca1c191a0220697a3ec9fa92993caf8c (diff)
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Initial revision
Diffstat (limited to 'gdb/source.c')
-rw-r--r--gdb/source.c1002
1 files changed, 0 insertions, 1002 deletions
diff --git a/gdb/source.c b/gdb/source.c
deleted file mode 100644
index ae3a70d..0000000
--- a/gdb/source.c
+++ /dev/null
@@ -1,1002 +0,0 @@
-/* List lines of source files for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-GDB is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
-any later version.
-
-GDB is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <stdio.h>
-#include "defs.h"
-#include "symtab.h"
-#include "param.h"
-
-#ifdef USG
-#include <sys/types.h>
-#include <fcntl.h>
-#endif
-
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/file.h>
-
-/* Path of directories to search for source files.
- Same format as the PATH environment variable's value. */
-
-static 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;
-
-/* 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;
-
-
-struct symtab *psymtab_to_symtab ();
-
-/* Set the source file default for the "list" command, specifying a
- symtab. Sigh. Behaivior specification: If it is called with a
- non-zero argument, that is the symtab to select. If it is not,
- first lookup "main"; if it exists, use the symtab and line it
- defines. If not, take the last symtab in the symtab_list (if it
- exists) or the last symtab in the psytab_list (if *it* exists). If
- none of this works, report an error. */
-
-void
-select_source_symtab (s)
- register struct symtab *s;
-{
- struct symtabs_and_lines sals;
- struct symtab_and_line sal;
- struct partial_symtab *ps, *cs_pst;
-
- if (s)
- {
- current_source_symtab = s;
- current_source_line = 1;
- return;
- }
-
- /* Make the default place to list be the function `main'
- if one exists. */
- if (lookup_symbol ("main", 0, VAR_NAMESPACE, 0))
- {
- sals = decode_line_spec ("main", 1);
- sal = sals.sals[0];
- free (sals.sals);
- current_source_symtab = sal.symtab;
- current_source_line = max (sal.line - 9, 1);
- return;
- }
-
- /* All right; find the last file in the symtab list (ignoring .h's). */
-
- if (s = symtab_list)
- {
- do
- {
- char *name = s->filename;
- int len = strlen (name);
- if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
- current_source_symtab = s;
- s = s->next;
- }
- while (s);
- current_source_line = 1;
- }
- else if (partial_symtab_list)
- {
- ps = partial_symtab_list;
- while (ps)
- {
- char *name = ps->filename;
- int len = strlen (name);
- if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
- cs_pst = ps;
- ps = ps->next;
- }
- if (cs_pst)
- if (cs_pst->readin)
- fatal ("Internal: select_source_symtab: readin pst found and no symtabs.");
- else
- current_source_symtab = psymtab_to_symtab (cs_pst);
- else
- current_source_symtab = 0;
- current_source_line = 1;
- }
-}
-
-static void
-directories_info ()
-{
- printf ("Source directories searched: %s\n", source_path);
-}
-
-void
-init_source_path ()
-{
- register struct symtab *s;
-
- source_path = savestring (current_directory, strlen (current_directory));
-
- /* Forget what we learned about line positions in source files;
- must check again now since files may be found in
- a different directory now. */
- for (s = symtab_list; s; s = s->next)
- if (s->line_charpos != 0)
- {
- free (s->line_charpos);
- s->line_charpos = 0;
- }
-}
-
-void
-directory_command (dirname, from_tty)
- char *dirname;
- int from_tty;
-{
- char *old = source_path;
-
- dont_repeat ();
-
- if (dirname == 0)
- {
- if (query ("Reinitialize source path to %s? ", current_directory))
- {
- init_source_path ();
- free (old);
- }
- }
- else
- {
- dirname = tilde_expand (dirname);
- make_cleanup (free, dirname);
-
- do
- {
- extern char *index ();
- char *name = dirname;
- register char *p;
- struct stat st;
-
- {
- char *colon = index (name, ':');
- char *space = index (name, ' ');
- char *tab = index (name, '\t');
- if (colon == 0 && space == 0 && tab == 0)
- p = dirname = name + strlen (name);
- else
- {
- p = 0;
- if (colon != 0 && (p == 0 || colon < p))
- p = colon;
- if (space != 0 && (p == 0 || space < p))
- p = space;
- if (tab != 0 && (p == 0 || tab < p))
- p = tab;
- dirname = p + 1;
- while (*dirname == ':' || *dirname == ' ' || *dirname == '\t')
- ++dirname;
- }
- }
-
- if (p[-1] == '/')
- /* Sigh. "foo/" => "foo" */
- --p;
- *p = '\0';
-
- while (p[-1] == '.')
- {
- if (p - name == 1)
- {
- /* "." => getwd (). */
- name = current_directory;
- goto append;
- }
- else if (p[-2] == '/')
- {
- if (p - name == 2)
- {
- /* "/." => "/". */
- *--p = '\0';
- goto append;
- }
- else
- {
- /* "...foo/." => "...foo". */
- p -= 2;
- *p = '\0';
- continue;
- }
- }
- else
- break;
- }
-
- if (*name != '/')
- name = concat (current_directory, "/", name);
- else
- name = savestring (name, p - name);
- make_cleanup (free, name);
-
- if (stat (name, &st) < 0)
- perror_with_name (name);
- if ((st.st_mode & S_IFMT) != S_IFDIR)
- error ("%s is not a directory.", name);
-
- append:
- {
- register unsigned int len = strlen (name);
-
- p = source_path;
- while (1)
- {
- if (!strncmp (p, name, len)
- && (p[len] == '\0' || p[len] == ':'))
- {
- if (from_tty)
- printf ("\"%s\" is already in the source path.\n", name);
- break;
- }
- p = index (p, ':');
- if (p != 0)
- ++p;
- else
- break;
- }
- if (p == 0)
- {
- source_path = concat (old, ":", name);
- free (old);
- old = source_path;
- }
- }
- } while (*dirname != '\0');
- if (from_tty)
- directories_info ();
- }
-}
-
-/* Open a file named STRING, searching path PATH (dir names sep by colons)
- using mode MODE and protection bits PROT in the calls to open.
- If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
- (ie pretend the first element of PATH is ".")
- If FILENAMED_OPENED is non-null, set it to a newly allocated string naming
- the actual file opened (this string will always start with a "/"
-
- 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;
-
- if (!path)
- path = ".";
-
- /* ./foo => foo */
- while (string[0] == '.' && string[1] == '/')
- string += 2;
-
- if (try_cwd_first || string[0] == '/')
- {
- filename = string;
- fd = open (filename, mode, prot);
- if (fd >= 0 || string[0] == '/')
- goto done;
- }
-
- filename = (char *) alloca (strlen (path) + strlen (string) + 2);
- fd = -1;
- for (p = path; p; p = p1 ? p1 + 1 : 0)
- {
- p1 = (char *) index (p, ':');
- if (p1)
- len = p1 - p;
- else
- len = strlen (p);
-
- strncpy (filename, p, len);
- filename[len] = 0;
- strcat (filename, "/");
- strcat (filename, string);
-
- fd = open (filename, mode, prot);
- if (fd >= 0) break;
- }
-
- done:
- if (filename_opened)
- if (fd < 0)
- *filename_opened = (char *) 0;
- else if (filename[0] == '/')
- *filename_opened = savestring (filename, strlen (filename));
- else
- {
- *filename_opened = concat (current_directory, "/", filename);
- }
-
- return fd;
-}
-
-/* Create and initialize the table S->line_charpos that records
- the positions of the lines in the source file, which is assumed
- to be open on descriptor DESC.
- All set S->nlines to the number of such lines. */
-
-static void
-find_source_lines (s, desc)
- struct symtab *s;
- int desc;
-{
- struct stat st;
- register char *data, *p, *end;
- int nlines = 0;
- int lines_allocated = 1000;
- int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int));
- extern int exec_mtime;
-
- if (fstat (desc, &st) < 0)
- perror_with_name (s->filename);
- if (get_exec_file (0) != 0 && exec_mtime < st.st_mtime)
- printf ("Source file is more recent than executable.\n");
-
- data = (char *) alloca (st.st_size);
- if (myread (desc, data, st.st_size) < 0)
- perror_with_name (s->filename);
- end = data + st.st_size;
- p = data;
- line_charpos[0] = 0;
- nlines = 1;
- while (p != end)
- {
- if (*p++ == '\n'
- /* A newline at the end does not start a new line. */
- && p != end)
- {
- if (nlines == lines_allocated)
- {
- lines_allocated *= 2;
- line_charpos = (int *) xrealloc (line_charpos,
- sizeof (int) * lines_allocated);
- }
- line_charpos[nlines++] = p - data;
- }
- }
- s->nlines = nlines;
- s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int));
-}
-
-/* Return the character position of a line LINE in symtab S.
- Return 0 if anything is invalid. */
-
-int
-source_line_charpos (s, line)
- struct symtab *s;
- int line;
-{
- if (!s) return 0;
- if (!s->line_charpos || line <= 0) return 0;
- if (line > s->nlines)
- line = s->nlines;
- return s->line_charpos[line - 1];
-}
-
-/* Return the line number of character position POS in symtab S. */
-
-int
-source_charpos_line (s, chr)
- register struct symtab *s;
- register int chr;
-{
- register int line = 0;
- register int *lnp;
-
- if (s == 0 || s->line_charpos == 0) return 0;
- lnp = s->line_charpos;
- /* Files are usually short, so sequential search is Ok */
- while (line < s->nlines && *lnp <= chr)
- {
- line++;
- lnp++;
- }
- if (line >= s->nlines)
- line = s->nlines;
- return line;
-}
-
-/* Get full pathname and line number positions for a symtab.
- Return nonzero if line numbers may have changed.
- Set *FULLNAME to actual name of the file as found by `openp',
- or to 0 if the file is not found. */
-
-int
-get_filename_and_charpos (s, line, fullname)
- struct symtab *s;
- int line;
- char **fullname;
-{
- register int desc, linenums_changed = 0;
-
- desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname);
- if (desc < 0)
- {
- if (fullname)
- *fullname = NULL;
- return 0;
- }
- if (fullname)
- *fullname = s->fullname;
- if (s->line_charpos == 0) linenums_changed = 1;
- if (linenums_changed) find_source_lines (s, desc);
- close (desc);
- return linenums_changed;
-}
-
-/* Print text describing the full name of the source file S
- and the line number LINE and its corresponding character position.
- The text starts with two Ctrl-z so that the Emacs-GDB interface
- can easily find it.
-
- MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
-
- Return 1 if successful, 0 if could not find the file. */
-
-int
-identify_source_line (s, line, mid_statement)
- struct symtab *s;
- int line;
- int mid_statement;
-{
- if (s->line_charpos == 0)
- get_filename_and_charpos (s, line, 0);
- if (s->fullname == 0)
- return 0;
- printf ("\032\032%s:%d:%d:%s:0x%x\n", s->fullname,
- line, s->line_charpos[line - 1],
- mid_statement ? "middle" : "beg",
- get_frame_pc (get_current_frame()));
- current_source_line = line;
- first_line_listed = line;
- last_line_listed = line;
- current_source_symtab = s;
- return 1;
-}
-
-/* Print source lines from the file of symtab S,
- starting with line number LINE and stopping before line number STOPLINE. */
-
-void
-print_source_lines (s, line, stopline, noerror)
- struct symtab *s;
- int line, stopline;
- int noerror;
-{
- register int c;
- register int desc;
- register FILE *stream;
- int nlines = stopline - line;
-
- desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname);
- if (desc < 0)
- {
- extern int errno;
- if (! noerror)
- perror_with_name (s->filename);
- print_sys_errmsg (s->filename, errno);
- return;
- }
-
- if (s->line_charpos == 0)
- find_source_lines (s, desc);
-
- if (line < 1 || line > s->nlines)
- {
- close (desc);
- error ("Line number %d out of range; %s has %d lines.",
- line, s->filename, s->nlines);
- }
-
- if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
- {
- close (desc);
- perror_with_name (s->filename);
- }
-
- current_source_symtab = s;
- current_source_line = line;
- first_line_listed = line;
-
- stream = fdopen (desc, "r");
- clearerr (stream);
-
- while (nlines-- > 0)
- {
- c = fgetc (stream);
- if (c == EOF) break;
- last_line_listed = current_source_line;
- printf_filtered ("%d\t", current_source_line++);
- do
- {
- if (c < 040 && c != '\t' && c != '\n')
- printf_filtered ("^%c", c + 0100);
- else if (c == 0177)
- printf_filtered ("^?");
- else
- printf_filtered ("%c", c);
- } while (c != '\n' && (c = fgetc (stream)) >= 0);
- }
-
- fclose (stream);
-}
-
-
-
-/*
- C++
- Print a list of files and line numbers which a user may choose from
- in order to list a function which was specified ambiguously
- (as with `list classname::overloadedfuncname', for example).
- The vector in SALS provides the filenames and line numbers.
- */
-static void
-ambiguous_line_spec (sals)
- struct symtabs_and_lines *sals;
-{
- int i;
-
- for (i = 0; i < sals->nelts; ++i)
- printf("file: \"%s\", line number: %d\n",
- sals->sals[i].symtab->filename, sals->sals[i].line);
-}
-
-
-static void
-list_command (arg, from_tty)
- char *arg;
- int from_tty;
-{
- struct symtabs_and_lines sals, sals_end;
- struct symtab_and_line sal, sal_end;
- struct symbol *sym;
- char *arg1;
- int no_end = 1;
- int dummy_end = 0;
- int dummy_beg = 0;
- int linenum_beg = 0;
- char *p;
-
- if (symtab_list == 0 && partial_symtab_list == 0)
- error ("No symbol table is loaded. Use the \"symbol-file\" command.");
-
- /* Pull in a current source symtab if necessary */
- if (current_source_symtab == 0 &&
- (arg == 0 || arg[0] == '+' || arg[0] == '-'))
- select_source_symtab (0);
-
- /* "l" or "l +" lists next ten lines. */
-
- if (arg == 0 || !strcmp (arg, "+"))
- {
- if (current_source_symtab == 0)
- error ("No default source file yet. Do \"help list\".");
- print_source_lines (current_source_symtab, current_source_line,
- current_source_line + 10, 0);
- return;
- }
-
- /* "l -" lists previous ten lines, the ones before the ten just listed. */
- if (!strcmp (arg, "-"))
- {
- if (current_source_symtab == 0)
- error ("No default source file yet. Do \"help list\".");
- print_source_lines (current_source_symtab,
- max (first_line_listed - 10, 1),
- first_line_listed, 0);
- return;
- }
-
- /* Now if there is only one argument, decode it in SAL
- and set NO_END.
- If there are two arguments, decode them in SAL and SAL_END
- and clear NO_END; however, if one of the arguments is blank,
- set DUMMY_BEG or DUMMY_END to record that fact. */
-
- arg1 = arg;
- if (*arg1 == ',')
- dummy_beg = 1;
- else
- {
- sals = decode_line_1 (&arg1, 0, 0, 0);
-
- if (! sals.nelts) return; /* C++ */
- if (sals.nelts > 1)
- {
- ambiguous_line_spec (&sals);
- free (sals.sals);
- return;
- }
-
- sal = sals.sals[0];
- free (sals.sals);
- }
-
- /* Record whether the BEG arg is all digits. */
-
- for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++);
- linenum_beg = (p == arg1);
-
- while (*arg1 == ' ' || *arg1 == '\t')
- arg1++;
- if (*arg1 == ',')
- {
- no_end = 0;
- arg1++;
- while (*arg1 == ' ' || *arg1 == '\t')
- arg1++;
- if (*arg1 == 0)
- dummy_end = 1;
- else
- {
- if (dummy_beg)
- sals_end = decode_line_1 (&arg1, 0, 0, 0);
- else
- sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line);
- if (sals_end.nelts == 0)
- return;
- if (sals_end.nelts > 1)
- {
- ambiguous_line_spec (&sals_end);
- free (sals_end.sals);
- return;
- }
- sal_end = sals_end.sals[0];
- free (sals_end.sals);
- }
- }
-
- if (*arg1)
- error ("Junk at end of line specification.");
-
- if (!no_end && !dummy_beg && !dummy_end
- && sal.symtab != sal_end.symtab)
- error ("Specified start and end are in different files.");
- if (dummy_beg && dummy_end)
- error ("Two empty args do not say what lines to list.");
-
- /* if line was specified by address,
- first print exactly which line, and which file.
- In this case, sal.symtab == 0 means address is outside
- of all known source files, not that user failed to give a filename. */
- if (*arg == '*')
- {
- if (sal.symtab == 0)
- error ("No source file for address 0x%x.", sal.pc);
- sym = find_pc_function (sal.pc);
- if (sym)
- printf ("0x%x is in %s (%s, line %d).\n",
- sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line);
- else
- printf ("0x%x is in %s, line %d.\n",
- sal.pc, sal.symtab->filename, sal.line);
- }
-
- /* If line was not specified by just a line number,
- and it does not imply a symtab, it must be an undebuggable symbol
- which means no source code. */
-
- if (! linenum_beg && sal.symtab == 0)
- error ("No line number known for %s.", arg);
-
- /* If this command is repeated with RET,
- turn it into the no-arg variant. */
-
- if (from_tty)
- *arg = 0;
-
- if (dummy_beg && sal_end.symtab == 0)
- error ("No default source file yet. Do \"help list\".");
- if (dummy_beg)
- print_source_lines (sal_end.symtab, max (sal_end.line - 9, 1),
- sal_end.line + 1, 0);
- else if (sal.symtab == 0)
- error ("No default source file yet. Do \"help list\".");
- else if (no_end)
- print_source_lines (sal.symtab, max (sal.line - 5, 1), sal.line + 5, 0);
- else
- print_source_lines (sal.symtab, sal.line,
- dummy_end ? sal.line + 10 : 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;
- int start_pc, end_pc;
- int i;
-
- if (arg == 0)
- {
- sal.symtab = current_source_symtab;
- sal.line = last_line_listed;
- sals.nelts = 1;
- sals.sals = (struct symtab_and_line *)
- xmalloc (sizeof (struct symtab_and_line));
- sals.sals[0] = sal;
- }
- else
- {
- sals = decode_line_spec_1 (arg, 0);
-
- /* If this command is repeated with RET,
- turn it into the no-arg variant. */
- if (from_tty)
- *arg = 0;
- }
-
- /* C++ More than one line may have been specified, as when the user
- specifies an overloaded function name. Print info on them all. */
- for (i = 0; i < sals.nelts; i++)
- {
- sal = sals.sals[i];
-
- if (sal.symtab == 0)
- error ("No source file specified.");
-
- if (sal.line > 0
- && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc))
- {
- if (start_pc == end_pc)
- printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n",
- sal.line, sal.symtab->filename, start_pc);
- else
- printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n",
- sal.line, sal.symtab->filename, start_pc, end_pc);
- /* x/i should display this line's code. */
- set_next_address (start_pc);
- /* Repeating "info line" should do the following line. */
- last_line_listed = sal.line + 1;
- }
- else
- printf ("Line number %d is out of range for \"%s\".\n",
- sal.line, sal.symtab->filename);
- }
-}
-
-/* Commands to search the source file for a regexp. */
-
-static void
-forward_search_command (regex, from_tty)
- char *regex;
-{
- register int c;
- register int desc;
- register FILE *stream;
- int line = last_line_listed + 1;
- char *msg;
-
- msg = (char *) re_comp (regex);
- if (msg)
- error (msg);
-
- if (current_source_symtab == 0)
- select_source_symtab (0);
-
- /* Search from last_line_listed+1 in current_source_symtab */
-
- desc = openp (source_path, 0, current_source_symtab->filename,
- O_RDONLY, 0, &current_source_symtab->fullname);
- if (desc < 0)
- perror_with_name (current_source_symtab->filename);
-
- if (current_source_symtab->line_charpos == 0)
- find_source_lines (current_source_symtab, desc);
-
- if (line < 1 || line > current_source_symtab->nlines)
- {
- close (desc);
- error ("Expression not found");
- }
-
- if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
- {
- close (desc);
- perror_with_name (current_source_symtab->filename);
- }
-
- stream = fdopen (desc, "r");
- clearerr (stream);
- while (1) {
- char buf[4096]; /* Should be reasonable??? */
- register char *p = buf;
-
- c = fgetc (stream);
- if (c == EOF)
- break;
- do {
- *p++ = c;
- } while (c != '\n' && (c = fgetc (stream)) >= 0);
-
- /* we now have a source line in buf, null terminate and match */
- *p = 0;
- if (re_exec (buf) > 0)
- {
- /* Match! */
- fclose (stream);
- print_source_lines (current_source_symtab,
- line, line+1, 0);
- current_source_line = max (line - 5, 1);
- return;
- }
- line++;
- }
-
- printf ("Expression not found\n");
- fclose (stream);
-}
-
-static void
-reverse_search_command (regex, from_tty)
- char *regex;
-{
- register int c;
- register int desc;
- register FILE *stream;
- int line = last_line_listed - 1;
- char *msg;
-
- msg = (char *) re_comp (regex);
- if (msg)
- error (msg);
-
- if (current_source_symtab == 0)
- select_source_symtab (0);
-
- /* Search from last_line_listed-1 in current_source_symtab */
-
- desc = openp (source_path, 0, current_source_symtab->filename,
- O_RDONLY, 0, &current_source_symtab->fullname);
- if (desc < 0)
- perror_with_name (current_source_symtab->filename);
-
- if (current_source_symtab->line_charpos == 0)
- find_source_lines (current_source_symtab, desc);
-
- if (line < 1 || line > current_source_symtab->nlines)
- {
- close (desc);
- error ("Expression not found");
- }
-
- if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
- {
- close (desc);
- perror_with_name (current_source_symtab->filename);
- }
-
- stream = fdopen (desc, "r");
- clearerr (stream);
- while (1)
- {
- char buf[4096]; /* Should be reasonable??? */
- register char *p = buf;
-
- c = fgetc (stream);
- if (c == EOF)
- break;
- do {
- *p++ = c;
- } while (c != '\n' && (c = fgetc (stream)) >= 0);
-
- /* We now have a source line in buf; null terminate and match. */
- *p = 0;
- if (re_exec (buf) > 0)
- {
- /* Match! */
- fclose (stream);
- print_source_lines (current_source_symtab,
- line, line+1, 0);
- current_source_line = max (line - 5, 1);
- return;
- }
- line--;
- if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0)
- {
- fclose (stream);
- perror_with_name (current_source_symtab->filename);
- }
- }
-
- printf ("Expression not found\n");
- fclose (stream);
- return;
-}
-
-void
-_initialize_source ()
-{
- current_source_symtab = 0;
- init_source_path ();
-
- add_com ("directory", class_files, directory_command,
- "Add directory DIR to end of search path for source files.\n\
-With no argument, reset the search path to just the working directory\n\
-and forget cached info on line positions in source files.");
-
- add_info ("directories", directories_info,
- "Current search path for finding source files.");
-
- add_info ("line", line_info,
- "Core addresses of the code for a source line.\n\
-Line can be specified as\n\
- LINENUM, to list around that line in current file,\n\
- FILE:LINENUM, to list around that line in that file,\n\
- FUNCTION, to list around beginning of that function,\n\
- FILE:FUNCTION, to distinguish among like-named static functions.\n\
-Default is to describe the last source line that was listed.\n\n\
-This sets the default address for \"x\" to the line's first instruction\n\
-so that \"x/i\" suffices to start examining the machine code.\n\
-The address is also stored as the value of \"$_\".");
-
- add_com ("forward-search", class_files, forward_search_command,
- "Search for regular expression (see regex(3)) from last line listed.");
- add_com_alias ("search", "forward-search", class_files, 0);
-
- add_com ("reverse-search", class_files, reverse_search_command,
- "Search backward for regular expression (see regex(3)) from last line listed.");
-
- add_com ("list", class_files, list_command,
- "List specified function or line.\n\
-With no argument, lists ten more lines after or around previous listing.\n\
-\"list -\" lists the ten lines before a previous ten-line listing.\n\
-One argument specifies a line, and ten lines are listed around that line.\n\
-Two arguments with comma between specify starting and ending lines to list.\n\
-Lines can be specified in these ways:\n\
- LINENUM, to list around that line in current file,\n\
- FILE:LINENUM, to list around that line in that file,\n\
- FUNCTION, to list around beginning of that function,\n\
- FILE:FUNCTION, to distinguish among like-named static functions.\n\
- *ADDRESS, to list around the line containing that address.\n\
-With two args if one is empty it stands for ten lines away from the other arg.");
-}
-