Change gdb_abspath to return a unique_xmalloc_ptr

This changes gdb_abspath to return a unique_xmalloc_ptr, and fixes up
the callers.  This allows the removal of a cleanup, and also puts
ownership rules into the API, where they belong.

ChangeLog
2017-08-22  Tom Tromey  <tom@tromey.com>

	* compile/compile.c (compile_file_command): Use
	gdb::unique_xmalloc_ptr, std::string.
	* utils.c (gdb_abspath): Change return type.
	* source.c (openp): Update.
	* objfiles.c (allocate_objfile): Update.
	* main.c (set_gdb_data_directory): Update.
	* utils.h (gdb_abspath): Return a gdb::unique_xmalloc_ptr.

1 files changed, 9 insertions, 12 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index 96ae709fb2..9959c01af1 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -2761,28 +2761,25 @@ gdb_realpath_keepfile (const char *filename)
 
 /* Return PATH in absolute form, performing tilde-expansion if necessary.
    PATH cannot be NULL or the empty string.
-   This does not resolve symlinks however, use gdb_realpath for that.
-   Space for the result is allocated with malloc.
-   If the path is already absolute, it is strdup'd.
-   If there is a problem computing the absolute path, the path is returned
-   unchanged (still strdup'd).  */
+   This does not resolve symlinks however, use gdb_realpath for that.  */
 
-char *
+gdb::unique_xmalloc_ptr<char>
 gdb_abspath (const char *path)
 {
   gdb_assert (path != NULL && path[0] != '\0');
 
   if (path[0] == '~')
-    return tilde_expand (path);
+    return gdb::unique_xmalloc_ptr<char> (tilde_expand (path));
 
   if (IS_ABSOLUTE_PATH (path))
-    return xstrdup (path);
+    return gdb::unique_xmalloc_ptr<char> (xstrdup (path));
 
   /* Beware the // my son, the Emacs barfs, the botch that catch...  */
-  return concat (current_directory,
-	    IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
-		 ? "" : SLASH_STRING,
-		 path, (char *) NULL);
+  return gdb::unique_xmalloc_ptr<char>
+    (concat (current_directory,
+	     IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
+	     ? "" : SLASH_STRING,
+	     path, (char *) NULL));
 }
 
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