runtime: don't stat a NULL filename

    Noticed in https://gcc.gnu.org/PR86331.

    Reviewed-on: https://go-review.googlesource.com/121417

From-SVN: r262234

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 3d825803ae819b854c1c225c10f32eb236a0aa36..237c46d9a66fc5bcefac01c273367c430e259c86 100644 (file)
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-baaaf1e0f1e9a54ea2dfe475154c85c83ec03740
+e1fcce0aec27b1f50ac0e736f39f4c806c2a5baa
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

diff --git a/libgo/runtime/go-caller.c b/libgo/runtime/go-caller.c
index 6b26ddccbcf2e6bbe0942f1ce984d0302f2e72b7..7f36955c069bfdcf8ede20bd25e6b46614e5d007 100644 (file)
--- a/libgo/runtime/go-caller.c
+++ b/libgo/runtime/go-caller.c
@@ -116,7 +116,7 @@ __go_get_backtrace_state ()
         argv[0] (http://gcc.gnu.org/PR61895).  It would be nice to
         have a better check for whether this file is the real
         executable.  */
-      if (stat (filename, &s) < 0 || s.st_size < 1024)
+      if (filename != NULL && (stat (filename, &s) < 0 || s.st_size < 1024))
        filename = NULL;
 
       back_state = backtrace_create_state (filename, 1, error_callback, NULL);