From patchwork Thu Jan 17 20:39:58 2013
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Subject: [Revisedx3] PR55679: skip invalid tests from r194458 on darwin
From: Jack Howarth <howarth@bromo.med.uc.edu>
X-Patchwork-Id: 213360
Message-Id: <20130117203958.GA16710@bromo.med.uc.edu>
To: gcc-patches@gcc.gnu.org
Cc: dodji@redhat.com, konstantin.s.serebryany@gmail.com,
 mikestump@comcast.net, iain@codesourcery.com,
 glider@google.com, jakub@redhat.com
Date: Thu, 17 Jan 2013 15:39:58 -0500

The attached revised patch disables three asan tests introduced in r194458 which are invalid
on darwin. The g++.dg/asan/interception-test-1.C test should be dg-skip-if'd on darwin since 
mac function interposition is used instead of interception. The c-c++-common/asan/swapcontext-test-1.c
test is invalid as ucontext support was deprecated in darwin10 and removed completely
in darwin11. The current implementation of check_effective_target_swapcontext in
lib/target-supports.exp doesn't catch the deprecation of ucontext support on darwin
because it doesn't try to parse the ucontext.h include file. The attached patch
changes the check_effective_target_swapcontext to use check_no_compiler_messages
with compilation of ucontext.h. The check_effective_target_setrlimit proc is also
modified to return 0 on darwin due to the non-posix compliant RLIMIT_AS on that target.
Tested without regression on both x86_64-apple-darwin10 and x86_64-unknown-linux-gnu.
Okay for gcc trunk?
         Jack
ps This patch leaves the failures in c-c++-common/asan/global-overflow-1.c and
c-c++-common/asan/stack-overflow-1.c as the only unresolved parts of PR55679 on darwin.
gcc/testsuite/

2013-01-17  Jack Howarth <howarth@bromo.med.uc.edu>

        PR sanitizer/55679
        * g++.dg/asan/interception-test-1.C: Skip on darwin.
        * lib/target-supports.exp (check_effective_target_swapcontext): Use
        check_no_compiler_messages to test support in ucontext.h.
	(check_effective_target_setrlimit): Return 0 for Darwin's non-posix
	compliant RLIMIT_AS.

Index: gcc/testsuite/lib/target-supports.exp
===================================================================
--- gcc/testsuite/lib/target-supports.exp	(revision 195280)
+++ gcc/testsuite/lib/target-supports.exp	(working copy)
@@ -730,12 +730,23 @@ proc check_effective_target_clone {} {
 
 # Return 1 if the target supports setrlimit, 0 otherwise.
 proc check_effective_target_setrlimit {} {
+    # Darwin has non-posix compliant RLIMIT_AS
+    if { [istarget *-*-darwin*] } {
+        return 0
+    }
     return [check_function_available "setrlimit"]
 }
 
 # Return 1 if the target supports swapcontext, 0 otherwise.
 proc check_effective_target_swapcontext {} {
-    return [check_function_available "swapcontext"]
+    return [check_no_compiler_messages swapcontext executable {
+	#include <ucontext.h>
+	int main (void)
+	{
+	  ucontext_t orig_context,child_context;
+	  if (swapcontext(&child_context, &orig_context) < 0) { }
+	}
+    }]
 }
 
 # Return 1 if compilation with -pthread is error-free for trivial
Index: gcc/testsuite/g++.dg/asan/interception-test-1.C
===================================================================
--- gcc/testsuite/g++.dg/asan/interception-test-1.C	(revision 195280)
+++ gcc/testsuite/g++.dg/asan/interception-test-1.C	(working copy)
@@ -3,6 +3,7 @@
 // { dg-do run }
 // { dg-options "-fno-builtin-malloc -fno-builtin-free" }
 // { dg-shouldfail "asan" }
+// { dg-skip-if "Darwin uses mac function interposition" { *-*-darwin* } }
 
 #include <stdlib.h>
 #include <stdio.h>