X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fsource.c;h=749617bb5781491926ab77fd5f8d54bf0efb8bbd;hb=256ab948f5ae0354bf2b64666781867e599e4f4a;hp=6126d5b1b900ebc07efa8951bb314f1aee883927;hpb=bb7592f01006b09c846831a9fb9c306307ba34f6;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/source.c b/gdb/source.c index 6126d5b1b9..749617bb57 100644 --- a/gdb/source.c +++ b/gdb/source.c @@ -1,43 +1,111 @@ /* List lines of source files for GDB, the GNU debugger. - Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc. - -GDB is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY. No author or distributor accepts responsibility to anyone -for the consequences of using it or for whether it serves any -particular purpose or works at all, unless he says so in writing. -Refer to the GDB General Public License for full details. - -Everyone is granted permission to copy, modify and redistribute GDB, -but only under the conditions described in the GDB General Public -License. A copy of this license is supposed to have been given to you -along with GDB so you can know your rights and responsibilities. It -should be in a file named COPYING. Among other things, the copyright -notice and this notice must be preserved on all copies. - -In other words, go ahead and share GDB, but don't try to stop -anyone else from sharing it farther. Help stamp out software hoarding! -*/ - -#include -#include -#include -#include + Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, + 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 + 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 "initialize.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 +#include "gdb_string.h" +#include "gdb_stat.h" +#include +#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" +#include + +#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. */ -static char *source_path; +char *source_path; /* Symtab of default file for listing lines of. */ -struct symtab *current_source_symtab; +static struct symtab *current_source_symtab; /* Default next line to list. */ -int current_source_line; +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. */ @@ -48,170 +116,539 @@ static int last_line_listed; static int first_line_listed; -START_FILE +/* 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, - specifying a symtab. */ +/* 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 -select_source_symtab (s) - register struct symtab *s; +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) { - struct symtabs_and_lines sals; - struct symtab_and_line sal; + current_source_symtab = s; + current_source_line = 1; + return; + } - /* Make the default place to list be the function `main' - if one exists. */ - if (lookup_symbol ("main", 0, VAR_NAMESPACE)) + 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_DOMAIN, 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) { - sals = decode_line_spec ("main", 1); - sal = sals.sals[0]; - free (sals.sals); - current_source_symtab = sal.symtab; - current_source_line = sal.line - 9; - return; + 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; - /* If there is no `main', use the last symtab in the list, - which is actually the first found in the file's symbol table. - But ignore .h files. */ - do + /* 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 = s->filename; + char *name = ps->filename; int len = strlen (name); - if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) - current_source_symtab = s; - s = s->next; + 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); } - while (s); - current_source_line = 1; } + if (current_source_symtab) + return; + + error ("Can't find a default source file"); } static void -directories_info () +show_directories (char *ignore, int from_tty) { - printf ("Source directories searched: %s\n", source_path); + 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 -init_source_path () +forget_cached_source_info (void) { register struct symtab *s; + register struct objfile *objfile; + struct partial_symtab *pst; - source_path = savestring (current_directory, strlen (current_directory)); + 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; + } + } - /* Forget what we learned about line positions in source files; - must check again now since files may be found in - a different directory now. */ - for (s = symtab_list; s; s = s->next) - if (s->line_charpos != 0) + ALL_OBJFILE_PSYMTABS (objfile, pst) { - free (s->line_charpos); - s->line_charpos = 0; + 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 (); } void -directory_command (dirname, from_tty) - char *dirname; - int from_tty; +init_last_source_visited (void) { - char *old = source_path; + last_source_visited = NULL; +} +/* 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 (query ("Reinitialize source path to %s? ", current_directory)) + if (from_tty && query ("Reinitialize source path to empty? ")) { + xfree (source_path); init_source_path (); - free (old); } } 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) +{ + add_path (dirname, which_path, 1); +} + +/* Workhorse of mod_path. Takes an extra argument to determine + if dirname should be parsed for separators that indicate multiple + directories. This allows for interfaces that pre-parse the dirname + and allow specification of traditional separator characters such + as space or tab. */ + +void +add_path (char *dirname, char **which_path, int parse_separators) +{ + 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; - register int len = strlen (dirname); - register char *tem; - extern char *index (); - if (index (dirname, ':')) - error ("Please add one directory at a time to the source path."); - if (dirname[len - 1] == '/') - /* Sigh. "foo/" => "foo" */ - dirname[--len] == '\0'; + { + char *separator = NULL; + char *space = NULL; + char *tab = NULL; + + if (parse_separators) + { + separator = strchr (name, DIRNAME_SEPARATOR); + space = strchr (name, ' '); + 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; + } + } - while (dirname[len - 1] == '.') + 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 (len == 1) + if (p - name == 1) { - /* "." => getwd () */ - dirname = current_directory; + /* "." => getwd (). */ + name = current_directory; goto append; } - else if (dirname[len - 2] == '/') + else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2])) { - if (len == 2) + if (p - name == 2) { - /* "/." => "/" */ - dirname[--len] = '\0'; + /* "/." => "/". */ + *--p = '\0'; goto append; } else { - /* "...foo/." => "...foo" */ - dirname[len -= 2] = '\0'; + /* "...foo/." => "...foo". */ + p -= 2; + *p = '\0'; continue; } } - break; + else + break; } - if (dirname[0] != '/') - dirname = concat (current_directory, "/", dirname); + 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] != '$') + name = concat (current_directory, SLASH_STRING, name, NULL); else - dirname = savestring (dirname, len); - make_cleanup (free, dirname); + name = savestring (name, p - name); + make_cleanup (xfree, name); - if (stat (dirname, &st) < 0) - perror_with_name (dirname); - if ((st.st_mode & S_IFMT) != S_IFDIR) - error ("%s is not a directory.", dirname); - - append: - len = strlen (dirname); - tem = source_path; - while (1) + /* Unless it's a variable, check existence. */ + if (name[0] != '$') { - if (!strncmp (tem, dirname, len) - && (tem[len] == '\0' || tem[len] == ':')) + /* 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) { - printf ("\"%s\" is already in the source path.\n", - dirname); - break; - } - tem = index (tem, ':'); - if (tem) - tem++; - else - { - source_path = concat (old, ":", dirname); - free (old); - break; + 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); } - if (from_tty) - directories_info (); + + 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"); } -/* Open a file named STRING, searching path PATH (dir names sep by colons) + +/* 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 ".") - 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 "/" + (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. */ @@ -219,120 +656,361 @@ directory_command (dirname, from_tty) /* >>>> 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; +openp (const char *path, int try_cwd_first, const char *string, + int mode, int prot, + char **filename_opened) { register int fd; register char *filename; - register char *p, *p1; + const char *p; + const char *p1; register int len; + int alloclen; - /* ./foo => foo */ - while (string[0] == '.' && string[1] == '/') - string += 2; + if (!path) + path = "."; - if (try_cwd_first || string[0] == '/') +#if defined(_WIN32) || defined(__CYGWIN__) + mode |= O_BINARY; +#endif + + if (try_cwd_first || IS_ABSOLUTE_PATH (string)) { - filename = string; - fd = open (filename, mode, prot); - if (fd >= 0 || string[0] == '/') - goto done; + int i; + + if (is_regular_file (string)) + { + filename = alloca (strlen (string) + 1); + strcpy (filename, string); + fd = open (filename, mode, prot); + if (fd >= 0) + goto done; + } + else + { + filename = NULL; + fd = -1; + } + + for (i = 0; string[i]; i++) + if (IS_DIR_SEPARATOR (string[i])) + goto done; } - filename = (char *) alloca (strlen (path) + strlen (string) + 2); + /* ./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 = (char *) index (p, ':'); + p1 = strchr (p, DIRNAME_SEPARATOR); if (p1) len = p1 - p; else len = strlen (p); - strncpy (filename, p, len); - filename[len] = 0; - strcat (filename, "/"); + 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, prot); - if (fd >= 0) break; + if (is_regular_file (filename)) + { + fd = open (filename, mode); + if (fd >= 0) + break; + } } - done: +done: if (filename_opened) - if (fd < 0) - *filename_opened = (char *) 0; - else if (filename[0] == '/') - *filename_opened = savestring (filename, strlen (filename)); - else - { - *filename_opened = concat (current_directory, "/", filename); - } + { + /* 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. */ -static void -find_source_lines (s, desc) - struct symtab *s; - int desc; +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 = (int *) xmalloc (lines_allocated * sizeof (int)); - extern int exec_mtime; - - fstat (desc, &st); - if (get_exec_file (0) != 0 && exec_mtime < st.st_mtime) - printf ("Source file is more recent than executable.\n"); - - data = (char *) alloca (st.st_size); - myread (desc, data, st.st_size); - end = data + st.st_size; - p = data; - line_charpos[0] = 0; - nlines = 1; - while (p != end) - { - if (*p++ == '\n' - /* A newline at the end does not start a new line. */ - && p != end) - { - if (nlines == lines_allocated) - { - lines_allocated *= 2; - line_charpos = (int *) xrealloc (line_charpos, - sizeof (int) * lines_allocated); - } - line_charpos[nlines++] = p - data; - } + 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 *) xrealloc (line_charpos, nlines * sizeof (int)); + 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; +source_line_charpos (struct symtab *s, int line) { - if (!s) return 0; - if (!s->line_charpos || line <= 0) return 0; + 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]; @@ -341,17 +1019,16 @@ source_line_charpos (s, line) /* Return the line number of character position POS in symtab S. */ int -source_charpos_line (s, chr) - register struct symtab *s; - register int chr; +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; + + 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) + while (line < s->nlines && *lnp <= chr) { line++; lnp++; @@ -360,31 +1037,33 @@ source_charpos_line (s, chr) 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. */ -int -get_filename_and_charpos (s, line, fullname) - struct symtab *s; - int line; - char **fullname; +static int +get_filename_and_charpos (struct symtab *s, char **fullname) { register int desc, linenums_changed = 0; - - desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname); + + 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); + if (s->line_charpos == 0) + linenums_changed = 1; + if (linenums_changed) + find_source_lines (s, desc); close (desc); return linenums_changed; } @@ -399,18 +1078,19 @@ get_filename_and_charpos (s, line, fullname) Return 1 if successful, 0 if could not find the file. */ int -identify_source_line (s, line, mid_statement) - struct symtab *s; - int line; - int mid_statement; +identify_source_line (struct symtab *s, int line, int mid_statement, + CORE_ADDR pc) { if (s->line_charpos == 0) - get_filename_and_charpos (s, line, 0); + get_filename_and_charpos (s, (char **) NULL); if (s->fullname == 0) return 0; - printf ("\032\032%s:%d:%d:%s\n", s->fullname, - line, s->line_charpos[line - 1], - mid_statement ? "middle" : "beg"); + 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; @@ -418,38 +1098,75 @@ identify_source_line (s, line, mid_statement) return 1; } + /* Print source lines from the file of symtab S, - starting with line number LINE and stopping before line number STOPLINE. */ + 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; +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; - desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname); + /* 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) { - extern int errno; - if (! noerror) - perror_with_name (s->filename); - print_sys_errmsg (s->filename, errno); + 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 out of range; %s has %d lines.", - s->filename, s->nlines); + 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) @@ -458,257 +1175,198 @@ print_source_lines (s, line, stopline, noerror) perror_with_name (s->filename); } - current_source_symtab = s; - current_source_line = line; - first_line_listed = line; - - stream = fdopen (desc, "r"); + stream = fdopen (desc, FDOPEN_MODE); clearerr (stream); while (nlines-- > 0) { + char buf[20]; + c = fgetc (stream); - if (c == EOF) break; + if (c == EOF) + break; last_line_listed = current_source_line; - printf ("%d\t", current_source_line++); + sprintf (buf, "%d\t", current_source_line++); + ui_out_text (uiout, buf); do { - if (c < 040 && c != '\t' && c != '\n') + if (c < 040 && c != '\t' && c != '\n' && c != '\r') { - fputc ('^', stdout); - fputc (c + 0100, stdout); + sprintf (buf, "^%c", c + 0100); + ui_out_text (uiout, buf); } else if (c == 0177) - printf ("^?"); + 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 - fputc (c, stdout); - } while (c != '\n' && (c = fgetc (stream)) >= 0); + { + sprintf (buf, "%c", c); + ui_out_text (uiout, buf); + } + } + while (c != '\n' && (c = fgetc (stream)) >= 0); } fclose (stream); } -static void -list_command (arg, from_tty) - char *arg; - int from_tty; -{ - struct symtabs_and_lines sals, sals_end; - struct symtab_and_line sal, sal_end; - struct symbol *sym; - char *arg1; - int no_end = 1; - int dummy_end = 0; - int dummy_beg = 0; - int linenum_beg = 0; - char *p; - - if (symtab_list == 0) - error ("Listing source lines requires symbols."); - - /* "l" or "l +" lists next ten lines. */ - - if (arg == 0 || !strcmp (arg, "+")) - { - if (current_source_symtab == 0) - error ("No default source file yet. Do \"help list\"."); - print_source_lines (current_source_symtab, current_source_line, - current_source_line + 10, 0); - return; - } - - /* "l -" lists previous ten lines, the ones before the ten just listed. */ - if (!strcmp (arg, "-")) - { - if (current_source_symtab == 0) - error ("No default source file yet. Do \"help list\"."); - print_source_lines (current_source_symtab, - max (first_line_listed - 10, 1), - first_line_listed, 0); - return; - } - - /* Now if there is only one argument, decode it in SAL - and set NO_END. - If there are two arguments, decode them in SAL and SAL_END - and clear NO_END; however, if one of the arguments is blank, - set DUMMY_BEG or DUMMY_END to record that fact. */ - - arg1 = arg; - if (*arg1 == ',') - dummy_beg = 1; - else - { - sals = decode_line_1 (&arg1, 0, 0, 0); +/* 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 */ - if (! sals.nelts) return; /* C++ */ - if (sals.nelts != 1) - { - error ("Unreasonable listing request"); - } - - sal = sals.sals[0]; - free (sals.sals); - } - - /* Record whether the BEG arg is all digits. */ - - for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++); - linenum_beg = (p == arg1); - - while (*arg1 == ' ' || *arg1 == '\t') - arg1++; - if (*arg1 == ',') - { - no_end = 0; - arg1++; - while (*arg1 == ' ' || *arg1 == '\t') - arg1++; - if (*arg1 == 0) - dummy_end = 1; - else - { - if (dummy_beg) - sals_end = decode_line_1 (&arg1, 0, 0, 0); - else - sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line); - if (! sals_end.nelts) return; /* C++ */ - sal_end = sals_end.sals[0]; - free (sals_end.sals); - } - } - - if (*arg1) - error ("Junk at end of line specification."); - - if (!no_end && !dummy_beg && !dummy_end - && sal.symtab != sal_end.symtab) - error ("Specified start and end are in different files."); - if (dummy_beg && dummy_end) - error ("Two empty args do not say what lines to list."); - - /* if line was specified by address, - first print exactly which line, and which file. - In this case, sal.symtab == 0 means address is outside - of all known source files, not that user failed to give a filename. */ - if (*arg == '*') - { - if (sal.symtab == 0) - error ("No source file for address 0x%x.", sal.pc); - sym = find_pc_function (sal.pc); - if (sym) - printf ("0x%x is in %s (%s, line %d).\n", - sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line); - else - printf ("0x%x is in %s, line %d.\n", - sal.pc, sal.symtab->filename, sal.line); - } - - /* If line was not specified by just a line number, - and it does not imply a symtab, it must be an undebuggable symbol - which means no source code. */ - - if (! linenum_beg && sal.symtab == 0) - error ("No line number known for %s.", arg); +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! */ - /* If this command is repeated with RET, - turn it into the no-arg variant. */ +static void +ambiguous_line_spec (struct symtabs_and_lines *sals) +{ + int i; - if (from_tty) - *arg = 0; - - if (dummy_beg && sal_end.symtab == 0) - error ("No default source file yet. Do \"help list\"."); - if (dummy_beg) - print_source_lines (sal_end.symtab, max (sal_end.line - 9, 1), - sal_end.line + 1, 0); - else if (sal.symtab == 0) - error ("No default source file yet. Do \"help list\"."); - else if (no_end) - print_source_lines (sal.symtab, max (sal.line - 5, 1), sal.line + 5, 0); - else - print_source_lines (sal.symtab, sal.line, - dummy_end ? sal.line + 10 : sal_end.line + 1, 0); + 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 (arg, from_tty) - char *arg; - int from_tty; +line_info (char *arg, int from_tty) { struct symtabs_and_lines sals; struct symtab_and_line sal; - int start_pc, end_pc; + 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 (arg); + sals = decode_line_spec_1 (arg, 0); - if (sals.nelts == 0) - return; /* C++ */ - if (sals.nelts != 1) - error ("unreasonable line info request"); - - sal = sals.sals[0]; - free (sals.sals); - /* If this command is repeated with RET, - turn it into the no-arg variant. */ - - if (from_tty) - *arg = 0; + dont_repeat (); } - if (sal.symtab == 0) - error ("No source file specified."); - if (sal.line > 0 - && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc)) + /* 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++) { - if (start_pc == end_pc) - printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n", - sal.line, sal.symtab->filename, start_pc); + 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 - printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n", - sal.line, sal.symtab->filename, start_pc, end_pc); - /* x/i should display this line's code. */ - set_next_address (start_pc); - /* Repeating "info line" should do the following line. */ - last_line_listed = sal.line + 1; + /* 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); } - else - printf ("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 (regex, from_tty) - char *regex; +forward_search_command (char *regex, int from_tty) { register int c; register int desc; register FILE *stream; - int line = last_line_listed + 1; + int line; char *msg; + line = last_line_listed + 1; + msg = (char *) re_comp (regex); if (msg) - error (msg); - - if (current_source_symtab == 0) - error ("No default source file yet. Do \"help list\"."); + error ("%s", msg); - /* Search from last_line_listed+1 in current_source_symtab */ + if (current_source_symtab == 0) + select_source_symtab (0); - desc = openp (source_path, 0, current_source_symtab->filename, - O_RDONLY, 0, ¤t_source_symtab->fullname); + desc = open_source_file (current_source_symtab); if (desc < 0) perror_with_name (current_source_symtab->filename); @@ -727,58 +1385,84 @@ forward_search_command (regex, from_tty) perror_with_name (current_source_symtab->filename); } - stream = fdopen (desc, "r"); + stream = fdopen (desc, FDOPEN_MODE); clearerr (stream); - while (1) { - char buf[4096]; /* Should be reasonable??? */ - register char *p = buf; - - c = fgetc (stream); - if (c == EOF) - break; - do { - *p++ = c; - } while (c != '\n' && (c = fgetc (stream)) >= 0); - - /* we now have a source line in buf, null terminate and match */ - *p = 0; - if (re_exec (buf) > 0) - { - /* Match! */ - fclose (stream); - print_source_lines (current_source_symtab, - line, line+1, 0); - current_source_line = max (line - 5, 1); - return; - } - line++; - } + 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 ("Expression not found\n"); + printf_filtered ("Expression not found\n"); fclose (stream); } +/* ARGSUSED */ static void -reverse_search_command (regex, from_tty) - char *regex; +reverse_search_command (char *regex, int from_tty) { register int c; register int desc; register FILE *stream; - int line = last_line_listed - 1; + int line; char *msg; + line = last_line_listed - 1; + msg = (char *) re_comp (regex); if (msg) - error (msg); - - if (current_source_symtab == 0) - error ("No default source file yet. Do \"help list\"."); + error ("%s", msg); - /* Search from last_line_listed-1 in current_source_symtab */ + if (current_source_symtab == 0) + select_source_symtab (0); - desc = openp (source_path, 0, current_source_symtab->filename, - O_RDONLY, 0, ¤t_source_symtab->fullname); + desc = open_source_file (current_source_symtab); if (desc < 0) perror_with_name (current_source_symtab->filename); @@ -797,19 +1481,32 @@ reverse_search_command (regex, from_tty) perror_with_name (current_source_symtab->filename); } - stream = fdopen (desc, "r"); + stream = fdopen (desc, FDOPEN_MODE); clearerr (stream); - while (1) + 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 = fgetc (stream); + c = getc (stream); if (c == EOF) break; - do { - *p++ = c; - } while (c != '\n' && (c = fgetc (stream)) >= 0); + 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; @@ -817,9 +1514,11 @@ reverse_search_command (regex, from_tty) { /* Match! */ fclose (stream); - print_source_lines (current_source_symtab, - line, line+1, 0); - current_source_line = max (line - 5, 1); + 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--; @@ -830,57 +1529,88 @@ reverse_search_command (regex, from_tty) } } - printf ("Expression not found\n"); + printf_filtered ("Expression not found\n"); fclose (stream); return; } -static -initialize () +void +_initialize_source (void) { + struct cmd_list_element *c; current_source_symtab = 0; init_source_path (); - add_com ("directory", class_files, directory_command, - "Add directory DIR to end of search path for source files.\n\ -With no argument, reset the search path to just the working directory\n\ -and forget cached info on line positions in source files."); + /* 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_info ("directories", directories_info, - "Current search path for finding source files."); + 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, - "Core addresses of the code for a source line.\n\ + 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 \"$_\"."); +The address is also stored as the value of \"$_\".", NULL)); add_com ("forward-search", class_files, forward_search_command, - "Search for regular expression (see regex(3)) from last line listed."); + "Search for regular expression (see regex(3)) from last line listed.\n\ +The matching line number is also stored as the value of \"$_\"."); add_com_alias ("search", "forward-search", class_files, 0); add_com ("reverse-search", class_files, reverse_search_command, - "Search backward for regular expression (see regex(3)) from last line listed."); - - add_com ("list", class_files, list_command, - "List specified function or line.\n\ -With no argument, lists ten more lines after or around previous listing.\n\ -\"list -\" lists the ten lines before a previous ten-line listing.\n\ -One argument specifies a line, and ten lines are listed around that line.\n\ -Two arguments with comma between specify starting and ending lines to list.\n\ -Lines can be specified in these ways:\n\ - LINENUM, to list around that line in current file,\n\ - FILE:LINENUM, to list around that line in that file,\n\ - FUNCTION, to list around beginning of that function,\n\ - FILE:FUNCTION, to distinguish among like-named static functions.\n\ - *ADDRESS, to list around the line containing that address.\n\ -With two args if one is empty it stands for ten lines away from the other arg."); -} + "Search backward for regular expression (see regex(3)) from last line listed.\n\ +The matching line number is also stored as the value of \"$_\"."); + + if (xdb_commands) + { + add_com_alias ("/", "forward-search", class_files, 0); + add_com_alias ("?", "reverse-search", class_files, 0); + } -END_FILE + 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); +}