PR gdb/15415

gdb/
2013-08-27  Jan Kratochvil  <jan.kratochvil@redhat.com>

	PR gdb/15415
	* corefile.c (get_exec_file): Use exec_filename.
	* defs.h (OPF_DISABLE_REALPATH): New definition.  Add new comment.
	* exec.c (exec_close): Free EXEC_FILENAME.
	(exec_file_attach): New variable canonical_pathname.  Use
	OPF_DISABLE_REALPATH.  Call gdb_realpath explicitly.  Set
	EXEC_FILENAME.
	* exec.h (exec_filename): New.
	* inferior.c (print_inferior, inferior_command): Use
	PSPACE_EXEC_FILENAME.
	* mi/mi-main.c (print_one_inferior): Likewise.
	* progspace.c (clone_program_space, print_program_space): Likewise.
	* progspace.h (struct program_space): New field pspace_exec_filename.
	* source.c (openp): Describe OPF_DISABLE_REALPATH.  New variable
	realpath_fptr, initialize it from OPF_DISABLE_REALPATH, use it.

gdb/testsuite/
2013-08-27  Jan Kratochvil  <jan.kratochvil@redhat.com>

	PR gdb/15415
	* gdb.base/argv0-symlink.c: New file.
	* gdb.base/argv0-symlink.exp: New file.

1 files changed, 22 insertions, 9 deletions

diff --git a/gdb/source.c b/gdb/source.c
index e1c498bf18..de3fb7c5a3 100644
--- a/gdb/source.c
+++ b/gdb/source.c
@@ -689,6 +689,11 @@ is_regular_file (const char *name)
    and the file, sigh!  Emacs gets confuzzed by this when we print the
    source file name!!! 
 
+   If OPTS does not have OPF_DISABLE_REALPATH set return FILENAME_OPENED
+   resolved by gdb_realpath.  Even with OPF_DISABLE_REALPATH this function
+   still returns filename starting with "/".  If FILENAME_OPENED is NULL
+   this option has no effect.
+
    If a file is found, return the descriptor.
    Otherwise, return -1, with errno set for the last name we tried to open.  */
 
@@ -848,19 +853,27 @@ done:
       /* If a file was opened, canonicalize its filename.  */
       if (fd < 0)
 	*filename_opened = NULL;
-      else if (IS_ABSOLUTE_PATH (filename))
-	*filename_opened = gdb_realpath (filename);
       else
 	{
-	  /* Beware the // my son, the Emacs barfs, the botch that catch...  */
+	  char *(*realpath_fptr) (const char *);
+
+	  realpath_fptr = ((opts & OPF_DISABLE_REALPATH) != 0
+			   ? xstrdup : gdb_realpath);
+
+	  if (IS_ABSOLUTE_PATH (filename))
+	    *filename_opened = realpath_fptr (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, (char *)NULL);
+	      char *f = concat (current_directory,
+				IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
+				? "" : SLASH_STRING,
+				filename, (char *)NULL);
 
-	  *filename_opened = gdb_realpath (f);
-	  xfree (f);
+	      *filename_opened = realpath_fptr (f);
+	      xfree (f);
+	    }
 	}
     }