[PATCH] [Msan] Fix use of mmap(MAP_ANONYMOUS) in the unit tests on FreeBSD

[Viktor Kutuzov]

Hi kcc, samsonov, eugenis, emaste,

On FreeBSD the 'fd' parameter is required to be (-1) when the MAP_ANONYMOUS flag is specified. Linux ignores that parameter in such cases.

http://reviews.llvm.org/D6929

Files:
  lib/msan/tests/msan_test.cc

Index: lib/msan/tests/msan_test.cc
===================================================================
--- lib/msan/tests/msan_test.cc
+++ lib/msan/tests/msan_test.cc
@@ -1161,7 +1161,7 @@
 
 TEST(MemorySanitizer, shmat) {
   void *p = mmap(NULL, 4096, PROT_READ | PROT_WRITE,
-                 MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
+                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
   ASSERT_NE(MAP_FAILED, p);
 
   ((char *)p)[10] = *GetPoisoned<U1>();
@@ -4120,7 +4120,8 @@
 
   // Allocate the page that was released to the OS in free() with the real mmap,
   // bypassing the interceptor.
-  char *q = (char *)real_mmap(p, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
+  char *q = (char *)real_mmap(p, 4096, PROT_READ | PROT_WRITE,
+                              MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
   ASSERT_NE((char *)0, q);
 
   ASSERT_TRUE(q <= p);

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