diff options
Diffstat (limited to 'gdb/source.c')
| -rw-r--r-- | gdb/source.c | 1667 |
1 files changed, 0 insertions, 1667 deletions
diff --git a/gdb/source.c b/gdb/source.c deleted file mode 100644 index ee4998d9a49..00000000000 --- a/gdb/source.c +++ /dev/null @@ -1,1667 +0,0 @@ -/* List lines of source files for GDB, the GNU debugger. - Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, - 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 - Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "symtab.h" -#include "expression.h" -#include "language.h" -#include "command.h" -#include "source.h" -#include "gdbcmd.h" -#include "frame.h" -#include "value.h" - -#include <sys/types.h> -#include "gdb_string.h" -#include "gdb_stat.h" -#include <fcntl.h> -#include "gdbcore.h" -#include "gdb_regex.h" -#include "symfile.h" -#include "objfiles.h" -#include "annotate.h" -#include "gdbtypes.h" -#include "linespec.h" -#include "filenames.h" /* for DOSish file names */ -#include "completer.h" -#include "ui-out.h" - -#ifdef CRLF_SOURCE_FILES - -/* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the - host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is - much faster than defining LSEEK_NOT_LINEAR. */ - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -#define OPEN_MODE (O_RDONLY | O_BINARY) -#define FDOPEN_MODE FOPEN_RB - -#else /* ! defined (CRLF_SOURCE_FILES) */ - -#define OPEN_MODE O_RDONLY -#define FDOPEN_MODE FOPEN_RT - -#endif /* ! defined (CRLF_SOURCE_FILES) */ - -/* Prototypes for exported functions. */ - -void _initialize_source (void); - -/* Prototypes for local functions. */ - -static int get_filename_and_charpos (struct symtab *, char **); - -static void reverse_search_command (char *, int); - -static void forward_search_command (char *, int); - -static void line_info (char *, int); - -static void list_command (char *, int); - -static void ambiguous_line_spec (struct symtabs_and_lines *); - -static void source_info (char *, int); - -static void show_directories (char *, int); - -/* Path of directories to search for source files. - Same format as the PATH environment variable's value. */ - -char *source_path; - -/* Symtab of default file for listing lines of. */ - -struct symtab *current_source_symtab; - -/* Default next line to list. */ - -int current_source_line; - -/* Default number of lines to print with commands like "list". - This is based on guessing how many long (i.e. more than chars_per_line - characters) lines there will be. To be completely correct, "list" - and friends should be rewritten to count characters and see where - things are wrapping, but that would be a fair amount of work. */ - -int lines_to_list = 10; - -/* Line number of last line printed. Default for various commands. - current_source_line is usually, but not always, the same as this. */ - -static int last_line_listed; - -/* First line number listed by last listing command. */ - -static int first_line_listed; - -/* Saves the name of the last source file visited and a possible error code. - Used to prevent repeating annoying "No such file or directories" msgs */ - -static struct symtab *last_source_visited = NULL; -static int last_source_error = 0; - - -/* Set the source file default for the "list" command to be S. - - If S is NULL, and we don't have a default, find one. This - should only be called when the user actually tries to use the - default, since we produce an error if we can't find a reasonable - default. Also, since this can cause symbols to be read, doing it - before we need to would make things slower than necessary. */ - -void -select_source_symtab (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_name (), 0, VAR_NAMESPACE, 0, NULL)) - { - sals = decode_line_spec (main_name (), 1); - sal = sals.sals[0]; - xfree (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) - { - internal_error (__FILE__, __LINE__, - "select_source_symtab: " - "readin pst found and no symtabs."); - } - else - { - current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst); - } - } - if (current_source_symtab) - return; - - error ("Can't find a default source file"); -} - -static void -show_directories (char *ignore, int from_tty) -{ - puts_filtered ("Source directories searched: "); - puts_filtered (source_path); - puts_filtered ("\n"); -} - -/* Forget what we learned about line positions in source files, and - which directories contain them; must check again now since files - may be found in a different directory now. */ - -void -forget_cached_source_info (void) -{ - register struct symtab *s; - register struct objfile *objfile; - struct partial_symtab *pst; - - for (objfile = object_files; objfile != NULL; objfile = objfile->next) - { - for (s = objfile->symtabs; s != NULL; s = s->next) - { - if (s->line_charpos != NULL) - { - xmfree (objfile->md, s->line_charpos); - s->line_charpos = NULL; - } - if (s->fullname != NULL) - { - xmfree (objfile->md, s->fullname); - s->fullname = NULL; - } - } - - ALL_OBJFILE_PSYMTABS (objfile, pst) - { - if (pst->fullname != NULL) - { - xfree (pst->fullname); - pst->fullname = NULL; - } - } - } -} - -void -init_source_path (void) -{ - char buf[20]; - - sprintf (buf, "$cdir%c$cwd", DIRNAME_SEPARATOR); - source_path = xstrdup (buf); - forget_cached_source_info (); -} - -/* Add zero or more directories to the front of the source path. */ - -void -directory_command (char *dirname, int from_tty) -{ - dont_repeat (); - /* FIXME, this goes to "delete dir"... */ - if (dirname == 0) - { - if (from_tty && query ("Reinitialize source path to empty? ")) - { - xfree (source_path); - init_source_path (); - } - } - else - { - mod_path (dirname, &source_path); - last_source_visited = NULL; - } - if (from_tty) - show_directories ((char *) 0, from_tty); - forget_cached_source_info (); -} - -/* Add zero or more directories to the front of an arbitrary path. */ - -void -mod_path (char *dirname, char **which_path) -{ - char *old = *which_path; - int prefix = 0; - - if (dirname == 0) - return; - - dirname = xstrdup (dirname); - make_cleanup (xfree, 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; - } - } - - if (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */ -#ifdef HAVE_DOS_BASED_FILE_SYSTEM - /* On MS-DOS and MS-Windows, h:\ is different from h: */ - && !(p == name + 3 && name[1] == ':') /* "d:/" */ -#endif - && IS_DIR_SEPARATOR (p[-1])) - /* Sigh. "foo/" => "foo" */ - --p; - *p = '\0'; - - while (p > name && p[-1] == '.') - { - if (p - name == 1) - { - /* "." => getwd (). */ - name = current_directory; - goto append; - } - else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2])) - { - if (p - name == 2) - { - /* "/." => "/". */ - *--p = '\0'; - goto append; - } - else - { - /* "...foo/." => "...foo". */ - p -= 2; - *p = '\0'; - continue; - } - } - else - break; - } - - if (name[0] == '~') - name = tilde_expand (name); -#ifdef HAVE_DOS_BASED_FILE_SYSTEM - else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */ - name = concat (name, ".", NULL); -#endif - else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$') - name = concat (current_directory, SLASH_STRING, name, NULL); - else - name = savestring (name, p - name); - make_cleanup (xfree, name); - - /* Unless it's a variable, check existence. */ - if (name[0] != '$') - { - /* These are warnings, not errors, since we don't want a - non-existent directory in a .gdbinit file to stop processing - of the .gdbinit file. - - Whether they get added to the path is more debatable. Current - answer is yes, in case the user wants to go make the directory - or whatever. If the directory continues to not exist/not be - a directory/etc, then having them in the path should be - harmless. */ - if (stat (name, &st) < 0) - { - int save_errno = errno; - fprintf_unfiltered (gdb_stderr, "Warning: "); - print_sys_errmsg (name, save_errno); - } - else if ((st.st_mode & S_IFMT) != S_IFDIR) - warning ("%s is not a directory.", name); - } - - append: - { - register unsigned int len = strlen (name); - - p = *which_path; - while (1) - { - /* FIXME: strncmp loses in interesting ways on MS-DOS and - MS-Windows because of case-insensitivity and two different - but functionally identical slash characters. We need a - special filesystem-dependent file-name comparison function. - - Actually, even on Unix I would use realpath() or its work- - alike before comparing. Then all the code above which - removes excess slashes and dots could simply go away. */ - if (!strncmp (p, name, len) - && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR)) - { - /* Found it in the search path, remove old copy */ - if (p > *which_path) - p--; /* Back over leading separator */ - if (prefix > p - *which_path) - goto skip_dup; /* Same dir twice in one cmd */ - strcpy (p, &p[len + 1]); /* Copy from next \0 or : */ - } - p = strchr (p, DIRNAME_SEPARATOR); - if (p != 0) - ++p; - else - break; - } - if (p == 0) - { - char tinybuf[2]; - - tinybuf[0] = DIRNAME_SEPARATOR; - tinybuf[1] = '\0'; - - /* If we have already tacked on a name(s) in this command, be sure they stay on the front as we tack on some more. */ - if (prefix) - { - char *temp, c; - - c = old[prefix]; - old[prefix] = '\0'; - temp = concat (old, tinybuf, name, NULL); - old[prefix] = c; - *which_path = concat (temp, "", &old[prefix], NULL); - prefix = strlen (temp); - xfree (temp); - } - else - { - *which_path = concat (name, (old[0] ? tinybuf : old), old, NULL); - prefix = strlen (name); - } - xfree (old); - old = *which_path; - } - } - skip_dup:; - } - while (*dirname != '\0'); -} - - -static void -source_info (char *ignore, int from_tty) -{ - 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 FILENAME_OPENED is non-null, set it to a newly allocated string naming - the actual file opened (this string will always start with a "/". We - have to take special pains to avoid doubling the "/" between the directory - and the file, sigh! Emacs gets confuzzed by this when we print the - source file name!!! - - If a file is found, return the descriptor. - Otherwise, return -1, with errno set for the last name we tried to open. */ - -/* >>>> This should only allow files of certain types, - >>>> eg executable, non-directory */ -int -openp (const char *path, int try_cwd_first, const char *string, - int mode, int prot, - char **filename_opened) -{ - register int fd; - register char *filename; - const char *p; - const char *p1; - register int len; - int alloclen; - - if (!path) - path = "."; - -#if defined(_WIN32) || defined(__CYGWIN__) - mode |= O_BINARY; -#endif - - if (try_cwd_first || IS_ABSOLUTE_PATH (string)) - { - int i; - filename = alloca (strlen (string) + 1); - strcpy (filename, string); - fd = open (filename, mode, prot); - if (fd >= 0) - goto done; - for (i = 0; string[i]; i++) - if (IS_DIR_SEPARATOR (string[i])) - goto done; - } - - /* ./foo => foo */ - while (string[0] == '.' && IS_DIR_SEPARATOR (string[1])) - string += 2; - - alloclen = strlen (path) + strlen (string) + 2; - filename = alloca (alloclen); - fd = -1; - for (p = path; p; p = p1 ? p1 + 1 : 0) - { - p1 = strchr (p, DIRNAME_SEPARATOR); - if (p1) - len = p1 - p; - else - len = strlen (p); - - if (len == 4 && p[0] == '$' && p[1] == 'c' - && p[2] == 'w' && p[3] == 'd') - { - /* Name is $cwd -- insert current directory name instead. */ - int newlen; - - /* First, realloc the filename buffer if too short. */ - len = strlen (current_directory); - newlen = len + strlen (string) + 2; - if (newlen > alloclen) - { - alloclen = newlen; - filename = alloca (alloclen); - } - strcpy (filename, current_directory); - } - else - { - /* Normal file name in path -- just use it. */ - strncpy (filename, p, len); - filename[len] = 0; - } - - /* Remove trailing slashes */ - while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1])) - filename[--len] = 0; - - strcat (filename + len, SLASH_STRING); - strcat (filename, string); - - fd = open (filename, mode); - if (fd >= 0) - break; - } - -done: - if (filename_opened) - { - if (fd < 0) - *filename_opened = NULL; - else if (IS_ABSOLUTE_PATH (filename)) - *filename_opened = gdb_realpath (filename); - else - { - /* Beware the // my son, the Emacs barfs, the botch that catch... */ - - char *f = concat (current_directory, - IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1]) - ? "" : SLASH_STRING, - filename, NULL); - *filename_opened = gdb_realpath (f); - xfree (f); - } - } - - return fd; -} - - -/* This is essentially a convenience, for clients that want the behaviour - of openp, using source_path, but that really don't want the file to be - opened but want instead just to know what the full pathname is (as - qualified against source_path). - - The current working directory is searched first. - - If the file was found, this function returns 1, and FULL_PATHNAME is - set to the fully-qualified pathname. - - Else, this functions returns 0, and FULL_PATHNAME is set to NULL. - */ -int -source_full_path_of (char *filename, char **full_pathname) -{ - int fd; - - fd = openp (source_path, 1, filename, O_RDONLY, 0, full_pathname); - if (fd < 0) - { - *full_pathname = NULL; - return 0; - } - - close (fd); - return 1; -} - - -/* Open a source file given a symtab S. Returns a file descriptor or - negative number for error. */ - -int -open_source_file (struct symtab *s) -{ - char *path = source_path; - const 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. */ - xmfree (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 = lbasename (s->filename); - if (p != s->filename) - result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname); - } - - if (result >= 0) - { - fullname = s->fullname; - s->fullname = mstrsave (s->objfile->md, s->fullname); - xfree (fullname); - } - return result; -} - -/* Return the path to the source file associated with symtab. Returns NULL - if no symtab. */ - -char * -symtab_to_filename (struct symtab *s) -{ - int fd; - - if (!s) - return NULL; - - /* If we've seen the file before, just return fullname. */ - - if (s->fullname) - return s->fullname; - - /* Try opening the file to setup fullname */ - - fd = open_source_file (s); - if (fd < 0) - return s->filename; /* File not found. Just use short name */ - - /* Found the file. Cleanup and return the full name */ - - close (fd); - return s->fullname; -} - - -/* Create and initialize the table S->line_charpos that records - the positions of the lines in the source file, which is assumed - to be open on descriptor DESC. - All set S->nlines to the number of such lines. */ - -void -find_source_lines (struct symtab *s, int desc) -{ - struct stat st; - register char *data, *p, *end; - int nlines = 0; - int lines_allocated = 1000; - int *line_charpos; - long mtime = 0; - int size; - - line_charpos = (int *) xmmalloc (s->objfile->md, - lines_allocated * sizeof (int)); - if (fstat (desc, &st) < 0) - perror_with_name (s->filename); - - if (s && s->objfile && s->objfile->obfd) - mtime = bfd_get_mtime (s->objfile->obfd); - else if (exec_bfd) - mtime = bfd_get_mtime (exec_bfd); - - if (mtime && mtime < st.st_mtime) - { - warning ("Source file is more recent than executable.\n"); - } - -#ifdef LSEEK_NOT_LINEAR - { - char c; - - /* Have to read it byte by byte to find out where the chars live */ - - line_charpos[0] = lseek (desc, 0, SEEK_CUR); - nlines = 1; - while (myread (desc, &c, 1) > 0) - { - if (c == '\n') - { - if (nlines == lines_allocated) - { - lines_allocated *= 2; - line_charpos = - (int *) xmrealloc (s->objfile->md, (char *) line_charpos, - sizeof (int) * lines_allocated); - } - line_charpos[nlines++] = lseek (desc, 0, SEEK_CUR); - } - } - } -#else /* lseek linear. */ - { - struct cleanup *old_cleanups; - - /* st_size might be a large type, but we only support source files whose - size fits in an int. */ - size = (int) st.st_size; - - /* Use malloc, not alloca, because this may be pretty large, and we may - run into various kinds of limits on stack size. */ - data = (char *) xmalloc (size); - old_cleanups = make_cleanup (xfree, data); - - /* Reassign `size' to result of read for systems where \r\n -> \n. */ - size = myread (desc, data, size); - if (size < 0) - perror_with_name (s->filename); - end = data + size; - p = data; - line_charpos[0] = 0; - nlines = 1; - while (p != end) - { - if (*p++ == '\n' - /* A newline at the end does not start a new line. */ - && p != end) - { - if (nlines == lines_allocated) - { - lines_allocated *= 2; - line_charpos = - (int *) 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 (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 (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 (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 (struct symtab *s, int line, int mid_statement, - CORE_ADDR pc) -{ - if (s->line_charpos == 0) - get_filename_and_charpos (s, (char **) NULL); - if (s->fullname == 0) - return 0; - if (line > s->nlines) - /* Don't index off the end of the line_charpos array. */ - return 0; - annotate_source (s->fullname, line, s->line_charpos[line - 1], - mid_statement, pc); - - current_source_line = line; - first_line_listed = line; - last_line_listed = line; - current_source_symtab = s; - return 1; -} - - -/* Print source lines from the file of symtab S, - starting with line number LINE and stopping before line number STOPLINE. */ - -static void print_source_lines_base (struct symtab *s, int line, int stopline, - int noerror); -static void -print_source_lines_base (struct symtab *s, int line, int stopline, int noerror) -{ - 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; - - /* If printing of source lines is disabled, just print file and line number */ - if (ui_out_test_flags (uiout, ui_source_list)) - { - /* Only prints "No such file or directory" once */ - if ((s != last_source_visited) || (!last_source_error)) - { - last_source_visited = s; - desc = open_source_file (s); - } - else - { - desc = last_source_error; - noerror = 1; - } - } - else - { - desc = -1; - noerror = 1; - } - - if (desc < 0) - { - last_source_error = desc; - - if (!noerror) - { - char *name = alloca (strlen (s->filename) + 100); - sprintf (name, "%d\t%s", line, s->filename); - print_sys_errmsg (name, errno); - } - else - ui_out_field_int (uiout, "line", line); - ui_out_text (uiout, "\tin "); - ui_out_field_string (uiout, "file", s->filename); - ui_out_text (uiout, "\n"); - - return; - } - - last_source_error = 0; - - if (s->line_charpos == 0) - find_source_lines (s, desc); - - if (line < 1 || line > s->nlines) - { - close (desc); - error ("Line number %d out of range; %s has %d lines.", - line, s->filename, s->nlines); - } - - if (lseek (desc, s->line_charpos[line - 1], 0) < 0) - { - close (desc); - perror_with_name (s->filename); - } - - stream = fdopen (desc, FDOPEN_MODE); - clearerr (stream); - - while (nlines-- > 0) - { - char buf[20]; - - c = fgetc (stream); - if (c == EOF) - break; - last_line_listed = current_source_line; - sprintf (buf, "%d\t", current_source_line++); - ui_out_text (uiout, buf); - do - { - if (c < 040 && c != '\t' && c != '\n' && c != '\r') - { - sprintf (buf, "^%c", c + 0100); - ui_out_text (uiout, buf); - } - else if (c == 0177) - ui_out_text (uiout, "^?"); -#ifdef CRLF_SOURCE_FILES - else if (c == '\r') - { - /* Skip a \r character, but only before a \n. */ - int c1 = fgetc (stream); - - if (c1 != '\n') - printf_filtered ("^%c", c + 0100); - if (c1 != EOF) - ungetc (c1, stream); - } -#endif - else - { - sprintf (buf, "%c", c); - ui_out_text (uiout, buf); - } - } - while (c != '\n' && (c = fgetc (stream)) >= 0); - } - - fclose (stream); -} - -/* Show source lines from the file of symtab S, starting with line - number LINE and stopping before line number STOPLINE. If this is the - not the command line version, then the source is shown in the source - window otherwise it is simply printed */ - -void -print_source_lines (struct symtab *s, int line, int stopline, int noerror) -{ - print_source_lines_base (s, line, stopline, noerror); -} - - - -/* Print 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 (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 (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); - xfree (sals.sals); - return; - } - - sal = sals.sals[0]; - xfree (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); - xfree (sals_end.sals); - return; - } - sal_end = sals_end.sals[0]; - xfree (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) - { - int first_line = sal.line - lines_to_list / 2; - - if (first_line < 1) first_line = 1; - - print_source_lines (sal.symtab, first_line, first_line + lines_to_list, - 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 (char *arg, int from_tty) -{ - struct symtabs_and_lines sals; - struct symtab_and_line sal; - CORE_ADDR start_pc, end_pc; - int i; - - INIT_SAL (&sal); /* initialize to zeroes */ - - if (arg == 0) - { - sal.symtab = current_source_symtab; - sal.line = last_line_listed; - sals.nelts = 1; - sals.sals = (struct symtab_and_line *) - xmalloc (sizeof (struct symtab_and_line)); - sals.sals[0] = sal; - } - else - { - sals = decode_line_spec_1 (arg, 0); - - dont_repeat (); - } - - /* C++ More than one line may have been specified, as when the user - specifies an overloaded function name. Print info on them all. */ - for (i = 0; i < sals.nelts; i++) - { - sal = sals.sals[i]; - - if (sal.symtab == 0) - { - printf_filtered ("No line number information available"); - if (sal.pc != 0) - { - /* This is useful for "info line *0x7f34". If we can't tell the - user about a source line, at least let them have the symbolic - address. */ - printf_filtered (" for address "); - wrap_here (" "); - print_address (sal.pc, gdb_stdout); - } - else - printf_filtered ("."); - printf_filtered ("\n"); - } - else if (sal.line > 0 - && find_line_pc_range (sal, &start_pc, &end_pc)) - { - if (start_pc == end_pc) - { - printf_filtered ("Line %d of \"%s\"", - sal.line, sal.symtab->filename); - wrap_here (" "); - printf_filtered (" is at address "); - print_address (start_pc, gdb_stdout); - wrap_here (" "); - printf_filtered (" but contains no code.\n"); - } - else - { - printf_filtered ("Line %d of \"%s\"", - sal.line, sal.symtab->filename); - wrap_here (" "); - printf_filtered (" starts at address "); - print_address (start_pc, gdb_stdout); - wrap_here (" "); - printf_filtered (" and ends at "); - print_address (end_pc, gdb_stdout); - printf_filtered (".\n"); - } - - /* x/i should display this line's code. */ - set_next_address (start_pc); - - /* Repeating "info line" should do the following line. */ - last_line_listed = sal.line + 1; - - /* If this is the only line, show the source code. If it could - not find the file, don't do anything special. */ - if (annotation_level && sals.nelts == 1) - identify_source_line (sal.symtab, sal.line, 0, start_pc); - } - else - /* Is there any case in which we get here, and have an address - which the user would want to see? If we have debugging symbols - and no line numbers? */ - printf_filtered ("Line number %d is out of range for \"%s\".\n", - sal.line, sal.symtab->filename); - } - xfree (sals.sals); -} - -/* Commands to search the source file for a regexp. */ - -/* ARGSUSED */ -static void -forward_search_command (char *regex, int from_tty) -{ - register int c; - register int desc; - register FILE *stream; - int line; - char *msg; - - line = last_line_listed + 1; - - msg = (char *) re_comp (regex); - if (msg) - error (msg); - - if (current_source_symtab == 0) - select_source_symtab (0); - - desc = open_source_file (current_source_symtab); - if (desc < 0) - perror_with_name (current_source_symtab->filename); - - if (current_source_symtab->line_charpos == 0) - find_source_lines (current_source_symtab, desc); - - if (line < 1 || line > current_source_symtab->nlines) - { - close (desc); - error ("Expression not found"); - } - - if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) - { - close (desc); - perror_with_name (current_source_symtab->filename); - } - - stream = fdopen (desc, FDOPEN_MODE); - clearerr (stream); - while (1) - { - static char *buf = NULL; - register char *p; - int cursize, newsize; - - cursize = 256; - buf = xmalloc (cursize); - p = buf; - - c = getc (stream); - if (c == EOF) - break; - do - { - *p++ = c; - if (p - buf == cursize) - { - newsize = cursize + cursize / 2; - buf = xrealloc (buf, newsize); - p = buf + cursize; - cursize = newsize; - } - } - while (c != '\n' && (c = getc (stream)) >= 0); - -#ifdef CRLF_SOURCE_FILES - /* Remove the \r, if any, at the end of the line, otherwise - regular expressions that end with $ or \n won't work. */ - if (p - buf > 1 && p[-2] == '\r') - { - p--; - p[-1] = '\n'; - } -#endif - - /* we now have a source line in buf, null terminate and match */ - *p = 0; - if (re_exec (buf) > 0) - { - /* Match! */ - fclose (stream); - print_source_lines (current_source_symtab, line, line + 1, 0); - set_internalvar (lookup_internalvar ("_"), - value_from_longest (builtin_type_int, - (LONGEST) line)); - current_source_line = max (line - lines_to_list / 2, 1); - return; - } - line++; - } - - printf_filtered ("Expression not found\n"); - fclose (stream); -} - -/* ARGSUSED */ -static void -reverse_search_command (char *regex, int from_tty) -{ - register int c; - register int desc; - register FILE *stream; - int line; - char *msg; - - line = last_line_listed - 1; - - msg = (char *) re_comp (regex); - if (msg) - error (msg); - - if (current_source_symtab == 0) - select_source_symtab (0); - - desc = open_source_file (current_source_symtab); - if (desc < 0) - perror_with_name (current_source_symtab->filename); - - if (current_source_symtab->line_charpos == 0) - find_source_lines (current_source_symtab, desc); - - if (line < 1 || line > current_source_symtab->nlines) - { - close (desc); - error ("Expression not found"); - } - - if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) - { - close (desc); - perror_with_name (current_source_symtab->filename); - } - - stream = fdopen (desc, FDOPEN_MODE); - clearerr (stream); - while (line > 1) - { -/* FIXME!!! We walk right off the end of buf if we get a long line!!! */ - char buf[4096]; /* Should be reasonable??? */ - register char *p = buf; - - c = getc (stream); - if (c == EOF) - break; - do - { - *p++ = c; - } - while (c != '\n' && (c = getc (stream)) >= 0); - -#ifdef CRLF_SOURCE_FILES - /* Remove the \r, if any, at the end of the line, otherwise - regular expressions that end with $ or \n won't work. */ - if (p - buf > 1 && p[-2] == '\r') - { - p--; - p[-1] = '\n'; - } -#endif - - /* We now have a source line in buf; null terminate and match. */ - *p = 0; - if (re_exec (buf) > 0) - { - /* Match! */ - fclose (stream); - print_source_lines (current_source_symtab, line, line + 1, 0); - set_internalvar (lookup_internalvar ("_"), - value_from_longest (builtin_type_int, - (LONGEST) line)); - current_source_line = max (line - lines_to_list / 2, 1); - return; - } - line--; - if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0) - { - fclose (stream); - perror_with_name (current_source_symtab->filename); - } - } - - printf_filtered ("Expression not found\n"); - fclose (stream); - return; -} - -void -_initialize_source (void) -{ - struct cmd_list_element *c; - current_source_symtab = 0; - init_source_path (); - - /* The intention is to use POSIX Basic Regular Expressions. - Always use the GNU regex routine for consistency across all hosts. - Our current GNU regex.c does not have all the POSIX features, so this is - just an approximation. */ - re_set_syntax (RE_SYNTAX_GREP); - - c = add_cmd ("directory", class_files, directory_command, - "Add directory DIR to beginning of search path for source files.\n\ -Forget cached info on source file locations and line positions.\n\ -DIR can also be $cwd for the current working directory, or $cdir for the\n\ -directory in which the source file was compiled into object code.\n\ -With no argument, reset the search path to $cdir:$cwd, the default.", - &cmdlist); - - if (dbx_commands) - add_com_alias ("use", "directory", class_files, 0); - - c->completer = filename_completer; - - add_cmd ("directories", no_class, show_directories, - "Current search path for finding source files.\n\ -$cwd in the path means the current working directory.\n\ -$cdir in the path means the compilation directory of the source file.", - &showlist); - - if (xdb_commands) - { - add_com_alias ("D", "directory", class_files, 0); - add_cmd ("ld", no_class, show_directories, - "Current search path for finding source files.\n\ -$cwd in the path means the current working directory.\n\ -$cdir in the path means the compilation directory of the source file.", - &cmdlist); - } - - add_info ("source", source_info, - "Information about the current source file."); - - add_info ("line", line_info, - concat ("Core addresses of the code for a source line.\n\ -Line can be specified as\n\ - LINENUM, to list around that line in current file,\n\ - FILE:LINENUM, to list around that line in that file,\n\ - FUNCTION, to list around beginning of that function,\n\ - FILE:FUNCTION, to distinguish among like-named static functions.\n\ -", "\ -Default is to describe the last source line that was listed.\n\n\ -This sets the default address for \"x\" to the line's first instruction\n\ -so that \"x/i\" suffices to start examining the machine code.\n\ -The address is also stored as the value of \"$_\".", NULL)); - - add_com ("forward-search", class_files, forward_search_command, - "Search for regular expression (see regex(3)) from last line listed.\n\ -The matching line number is also stored as the value of \"$_\"."); - add_com_alias ("search", "forward-search", class_files, 0); - - add_com ("reverse-search", class_files, reverse_search_command, - "Search backward for regular expression (see regex(3)) from last line listed.\n\ -The matching line number is also stored as the value of \"$_\"."); - - if (xdb_commands) - { - add_com_alias ("/", "forward-search", class_files, 0); - add_com_alias ("?", "reverse-search", class_files, 0); - } - - add_com ("list", class_files, list_command, - concat ("List specified function or line.\n\ -With no argument, lists ten more lines after or around previous listing.\n\ -\"list -\" lists the ten lines before a previous ten-line listing.\n\ -One argument specifies a line, and ten lines are listed around that line.\n\ -Two arguments with comma between specify starting and ending lines to list.\n\ -", "\ -Lines can be specified in these ways:\n\ - LINENUM, to list around that line in current file,\n\ - FILE:LINENUM, to list around that line in that file,\n\ - FUNCTION, to list around beginning of that function,\n\ - FILE:FUNCTION, to distinguish among like-named static functions.\n\ - *ADDRESS, to list around the line containing that address.\n\ -With two args if one is empty it stands for ten lines away from the other arg.", NULL)); - - if (!xdb_commands) - add_com_alias ("l", "list", class_files, 1); - else - add_com_alias ("v", "list", class_files, 1); - - if (dbx_commands) - add_com_alias ("file", "list", class_files, 1); - - add_show_from_set - (add_set_cmd ("listsize", class_support, var_uinteger, - (char *) &lines_to_list, - "Set number of source lines gdb will list by default.", - &setlist), - &showlist); -} |