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-rw-r--r--gdb/source.c1538
1 files changed, 0 insertions, 1538 deletions
diff --git a/gdb/source.c b/gdb/source.c
deleted file mode 100644
index 997cd1d..0000000
--- a/gdb/source.c
+++ /dev/null
@@ -1,1538 +0,0 @@
-/* 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) */
-
-/* Prototypes for local functions. */
-
-static int open_source_file PARAMS ((struct symtab *));
-
-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));
-
-static void find_source_lines PARAMS ((struct symtab *, 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;
-
-
-/* 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);
- 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;
-}
-
-/* Open a source file given a symtab S. Returns a file descriptor or
- negative number for error. */
-
-static 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. */
-
-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;
- long mtime;
- 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);
- if (mtime && mtime < st.st_mtime)
- printf_filtered ("Source file is more recent than executable.\n");
- }
- else if (exec_bfd)
- {
- mtime = bfd_get_mtime(exec_bfd);
- if (mtime && mtime < st.st_mtime)
- printf_filtered ("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. */
-
-void
-print_source_lines (s, line, stopline, noerror)
- struct symtab *s;
- int line, stopline;
- int noerror;
-{
- register int c;
- register int desc;
- register FILE *stream;
- int nlines = stopline - line;
-
- /* Regardless of whether we can open the file, set current_source_symtab. */
- current_source_symtab = s;
- current_source_line = line;
- first_line_listed = line;
-
- desc = open_source_file (s);
- if (desc < 0)
- {
- if (! noerror) {
- char *name = alloca (strlen (s->filename) + 100);
- sprintf (name, "%s:%d", s->filename, line);
- print_sys_errmsg (name, errno);
- }
- return;
- }
-
- if (s->line_charpos == 0)
- find_source_lines (s, desc);
-
- if (line < 1 || line > s->nlines)
- {
- close (desc);
- error ("Line number %d out of range; %s has %d lines.",
- line, s->filename, s->nlines);
- }
-
- if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
- {
- close (desc);
- perror_with_name (s->filename);
- }
-
- stream = fdopen (desc, 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);
-}
-
-
-
-/* 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)
- print_source_lines (sal.symtab,
- max (sal.line - (lines_to_list / 2), 1),
- sal.line + (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 = last_line_listed + 1;
- char *msg;
-
- msg = (char *) re_comp (regex);
- if (msg)
- error (msg);
-
- if (current_source_symtab == 0)
- select_source_symtab (0);
-
- /* Search from last_line_listed+1 in current_source_symtab */
-
- desc = open_source_file (current_source_symtab);
- if (desc < 0)
- perror_with_name (current_source_symtab->filename);
-
- if (current_source_symtab->line_charpos == 0)
- find_source_lines (current_source_symtab, desc);
-
- if (line < 1 || line > current_source_symtab->nlines)
- {
- close (desc);
- error ("Expression not found");
- }
-
- if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
- {
- close (desc);
- perror_with_name (current_source_symtab->filename);
- }
-
- stream = fdopen (desc, 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);
- 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 = last_line_listed - 1;
- char *msg;
-
- msg = (char *) re_comp (regex);
- if (msg)
- error (msg);
-
- if (current_source_symtab == 0)
- select_source_symtab (0);
-
- /* Search from last_line_listed-1 in current_source_symtab */
-
- desc = open_source_file (current_source_symtab);
- if (desc < 0)
- perror_with_name (current_source_symtab->filename);
-
- if (current_source_symtab->line_charpos == 0)
- find_source_lines (current_source_symtab, desc);
-
- if (line < 1 || line > current_source_symtab->nlines)
- {
- close (desc);
- error ("Expression not found");
- }
-
- if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
- {
- close (desc);
- perror_with_name (current_source_symtab->filename);
- }
-
- stream = fdopen (desc, 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);
- 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);
- 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);
-
- 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 \"$_\".");
-
- 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));
-
- add_com_alias ("l", "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);
-}