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Diffstat (limited to 'gnu/usr.bin/gdb/source.c')
| -rw-r--r-- | gnu/usr.bin/gdb/source.c | 1166 |
1 files changed, 0 insertions, 1166 deletions
diff --git a/gnu/usr.bin/gdb/source.c b/gnu/usr.bin/gdb/source.c deleted file mode 100644 index bb65e1c..0000000 --- a/gnu/usr.bin/gdb/source.c +++ /dev/null @@ -1,1166 +0,0 @@ -/*- - * This code is derived from software copyrighted by the Free Software - * Foundation. - * - * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. - * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. - */ - -#ifndef lint -static char sccsid[] = "@(#)source.c 6.3 (Berkeley) 5/8/91"; -#endif /* not lint */ - -/* 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 <string.h> -#include "defs.h" -#include "param.h" -#include "symtab.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 - { - 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 && line + 1 == stopline) - { - /* can't find the file - tell user where we are anyway */ - current_source_symtab = s; - current_source_line = line; - first_line_listed = line; - last_line_listed = line; - printf_filtered ("%d\t(%s)\n", current_source_line++, s->filename); - } - else - { - 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 -file_command(arg, from_tty) - char *arg; - int from_tty; -{ - struct symtabs_and_lines sals; - struct symtab_and_line sal; - struct symbol *sym; - char *arg1; - 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 (arg == 0 || arg[0] == 0) { - if (current_source_symtab == 0) - select_source_symtab(0); - else - printf("%s\n", current_source_symtab->filename); - return; - } - arg1 = arg; - 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); - - /* if line was specified by address, - 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 (sal.symtab == 0) - { - if (! linenum_beg) - error ("No line number known for %s.", arg); - else - error ("No default source file yet. Do \"help list\"."); - } - else - { - current_source_symtab = sal.symtab; - current_source_line = sal.line; - first_line_listed = sal.line; - } -} - -#define PUSH_STACK_SIZE 32 -static struct { - struct symtab *symtab; - int line; -} push_stack[PUSH_STACK_SIZE]; - -static unsigned int push_stack_ptr; - -static void -push_to_file_command (arg, from_tty) - char *arg; - int from_tty; -{ - struct symtab *cursym = current_source_symtab; - int curline = current_source_line; - register unsigned int i; - - file_command(arg, from_tty); - - /* if we got back, command was successful */ - i = push_stack_ptr; - push_stack[i].symtab = cursym; - push_stack[i].line = curline; - push_stack_ptr = (i + 1) & (PUSH_STACK_SIZE - 1); -} - -static void -pop_file_command (arg, from_tty) - char *arg; - int from_tty; -{ - register unsigned int i = push_stack_ptr; - - /* if there's something on the stack, pop it & clear the slot. */ - i = (i + (PUSH_STACK_SIZE - 1)) & (PUSH_STACK_SIZE - 1); - if (push_stack[i].symtab) { - current_source_symtab = push_stack[i].symtab; - first_line_listed = current_source_line = push_stack[i].line; - push_stack[i].symtab = NULL; - push_stack_ptr = i; - } -} - - -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, ¤t_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, ¤t_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."); - add_com ("file", class_files, file_command, - "Select current file, function and line for display or list.\n\ -Specification can have the form:\n\ - LINENUM, to select that line in current file,\n\ - FILE:LINENUM, to select that line in that file,\n\ - FUNCTION, to select beginning of that function,\n\ - FILE:FUNCTION, to distinguish among like-named static functions.\n\ - *ADDRESS, to select the line containing that address."); - add_com ("push-to-file", class_files, push_to_file_command, - "Like \"file\" command but remembers current file & line on a stack.\n\ -Can later return to current file with \"pop-file\" command.\n\ -Up to 32 file positions can be pushed on stack."); - add_com ("pop-file", class_files, pop_file_command, - "Pops back to file position saved by most recent \"push-to-file\".\n\ -If everything has been popped from stack, command does nothing."); -} - |
