From: Tom Tromey <tom@tromey.com>
Date: Mon, 6 Jun 2016 19:01:52 +0000 (-0600)
Subject: Change reopen_exec_file to check result of stat
X-Git-Tag: gdb-7.12-release~256
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=537d9b851957475a8122949939023c81b1df1673;p=external%2Fbinutils.git

Change reopen_exec_file to check result of stat

This seems to be a real bug found by -Wunused-but-set-variable.  If
"stat" fails for some reason, gdb would use the uninitialized "st".

2016-07-14  Tom Tromey  <tom@tromey.com>

	* corefile.c (reopen_exec_file): Only examine st.st_mtime if stat
	succeeded.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ba207ba..cef090c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2016-07-14  Tom Tromey  <tom@tromey.com>
+
+	* corefile.c (reopen_exec_file): Only examine st.st_mtime if stat
+	succeeded.
+
 2016-07-13  Tom Tromey  <tom@tromey.com>
 
 	PR python/15620, PR python/18620:
diff --git a/gdb/corefile.c b/gdb/corefile.c
index 6cc2afc..64de931 100644
--- a/gdb/corefile.c
+++ b/gdb/corefile.c
@@ -144,7 +144,7 @@ reopen_exec_file (void)
   cleanups = make_cleanup (xfree, filename);
   res = stat (filename, &st);
 
-  if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
+  if (res == 0 && exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
     exec_file_attach (filename, 0);
   else
     /* If we accessed the file since last opening it, close it now;