<div dir="ltr">Why? </div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 23, 2013 at 6:27 AM, Evgeniy Stepanov <span dir="ltr"><<a href="mailto:eugeni.stepanov@gmail.com" target="_blank">eugeni.stepanov@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: eugenis<br>
Date: Tue Apr 23 08:27:36 2013<br>
New Revision: 180101<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=180101&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=180101&view=rev</a><br>
Log:<br>
[msan] Unpoison the result of posix_memalign.<br>
<br>
Modified:<br>
    compiler-rt/trunk/lib/msan/msan_interceptors.cc<br>
    compiler-rt/trunk/lib/msan/tests/msan_test.cc<br>
<br>
Modified: compiler-rt/trunk/lib/msan/msan_interceptors.cc<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/msan_interceptors.cc?rev=180101&r1=180100&r2=180101&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/msan_interceptors.cc?rev=180101&r1=180100&r2=180101&view=diff</a><br>

==============================================================================<br>
--- compiler-rt/trunk/lib/msan/msan_interceptors.cc (original)<br>
+++ compiler-rt/trunk/lib/msan/msan_interceptors.cc Tue Apr 23 08:27:36 2013<br>
@@ -114,8 +114,10 @@ INTERCEPTOR(void *, memset, void *s, int<br>
 INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) {<br>
   GET_MALLOC_STACK_TRACE;<br>
   CHECK_EQ(alignment & (alignment - 1), 0);<br>
-  *memptr = MsanReallocate(&stack, 0, size, alignment, false);<br>
   CHECK_NE(memptr, 0);<br>
+  *memptr = MsanReallocate(&stack, 0, size, alignment, false);<br>
+  CHECK_NE(*memptr, 0);<br>
+  __msan_unpoison(memptr, sizeof(*memptr));<br>
   return 0;<br>
 }<br>
<br>
<br>
Modified: compiler-rt/trunk/lib/msan/tests/msan_test.cc<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/tests/msan_test.cc?rev=180101&r1=180100&r2=180101&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/tests/msan_test.cc?rev=180101&r1=180100&r2=180101&view=diff</a><br>

==============================================================================<br>
--- compiler-rt/trunk/lib/msan/tests/msan_test.cc (original)<br>
+++ compiler-rt/trunk/lib/msan/tests/msan_test.cc Tue Apr 23 08:27:36 2013<br>
@@ -1627,6 +1627,15 @@ TEST(MemorySanitizer, PreAllocatedStackT<br>
   ASSERT_EQ(0, res);<br>
 }<br>
<br>
+TEST(MemorySanitizer, posix_memalign) {<br>
+  void *p;<br>
+  EXPECT_POISONED(p);<br>
+  int res = posix_memalign(&p, 4096, 13);<br>
+  ASSERT_EQ(0, res);<br>
+  EXPECT_NOT_POISONED(p);<br>
+  free(p);<br>
+}<br>
+<br>
 TEST(MemorySanitizer, uname) {<br>
   struct utsname u;<br>
   int res = uname(&u);<br>
<br>
<br>
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</blockquote></div><br></div>