| /* 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 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. */ |
| |
| static struct symtab *current_source_symtab; |
| |
| /* Default next line to list. */ |
| |
| static 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; |
| |
| /* Return the first line listed by print_source_lines. |
| Used by command interpreters to request listing from |
| a previous point. */ |
| |
| int |
| get_first_line_listed (void) |
| { |
| return first_line_listed; |
| } |
| |
| /* Return the default number of lines to print with commands like the |
| cli "list". The caller of print_source_lines must use this to |
| calculate the end line and use it in the call to print_source_lines |
| as it does not automatically use this value. */ |
| |
| int |
| get_lines_to_list (void) |
| { |
| return lines_to_list; |
| } |
| |
| /* Return the current source file for listing and next line to list. |
| NOTE: The returned sal pc and end fields are not valid. */ |
| |
| struct symtab_and_line |
| get_current_source_symtab_and_line (void) |
| { |
| struct symtab_and_line cursal; |
| |
| cursal.symtab = current_source_symtab; |
| cursal.line = current_source_line; |
| cursal.pc = 0; |
| cursal.end = 0; |
| |
| return cursal; |
| } |
| |
| /* If the current source file for listing is not set, try and get a default. |
| Usually called before get_current_source_symtab_and_line() is called. |
| It may err out if a default cannot be determined. |
| We must be cautious about where it is called, as it can recurse as the |
| process of determining a new default may call the caller! |
| Use get_current_source_symtab_and_line only to get whatever |
| we have without erroring out or trying to get a default. */ |
| |
| void |
| set_default_source_symtab_and_line (void) |
| { |
| struct symtab_and_line cursal; |
| |
| 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) |
| select_source_symtab (0); |
| } |
| |
| /* Return the current default file for listing and next line to list |
| (the returned sal pc and end fields are not valid.) |
| and set the current default to whatever is in SAL. |
| NOTE: The returned sal pc and end fields are not valid. */ |
| |
| struct symtab_and_line |
| set_current_source_symtab_and_line (const struct symtab_and_line *sal) |
| { |
| struct symtab_and_line cursal; |
| |
| cursal.symtab = current_source_symtab; |
| cursal.line = current_source_line; |
| |
| current_source_symtab = sal->symtab; |
| current_source_line = sal->line; |
| cursal.pc = 0; |
| cursal.end = 0; |
| |
| return cursal; |
| } |
| |
| /* Reset any information stored about a default file and line to print. */ |
| |
| void |
| clear_current_source_symtab_and_line (void) |
| { |
| current_source_symtab = 0; |
| current_source_line = 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); |
| printf_filtered ("%s preprocessor macro info.\n", |
| s->macro_table ? "Includes" : "Does not include"); |
| } |
| |
| |
| /* Return True if the file NAME exists and is a regular file */ |
| static int |
| is_regular_file (const char *name) |
| { |
| struct stat st; |
| const int status = stat (name, &st); |
| |
| /* Stat should never fail except when the file does not exist. |
| If stat fails, analyze the source of error and return True |
| unless the file does not exist, to avoid returning false results |
| on obscure systems where stat does not work as expected. |
| */ |
| if (status != 0) |
| return (errno != ENOENT); |
| |
| return S_ISREG (st.st_mode); |
| } |
| |
| /* 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)) && is_regular_file (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); |
| |
| if (is_regular_file (filename)) |
| { |
| fd = open (filename, mode); |
| if (fd >= 0) |
| break; |
| } |
| } |
| |
| done: |
| if (filename_opened) |
| { |
| /* If a file was opened, canonicalize its filename. Use xfullpath |
| rather than gdb_realpath to avoid resolving the basename part |
| of filenames when the associated file is a symbolic link. This |
| fixes a potential inconsistency between the filenames known to |
| GDB and the filenames it prints in the annotations. */ |
| if (fd < 0) |
| *filename_opened = NULL; |
| else if (IS_ABSOLUTE_PATH (filename)) |
| *filename_opened = xfullpath (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 = xfullpath (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', or 'list objectiveCSelector:). |
| The vector in SALS provides the filenames and line numbers. |
| NOTE: some of the SALS may have no filename or line information! */ |
| |
| 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); |
| } |
| |
| /* 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); |
| |
| set_cmd_completer (c, 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_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); |
| } |