Revert 226920 "Roll Clang 188423:191856."

trunk/src/base/security_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ skipping 57 matching lines @@
   // This should detect a TCMalloc bypass from setting
   // the CHROME_ALLOCATOR environment variable.
   char* allocator = getenv("CHROME_ALLOCATOR");
   if (allocator && strcmp(allocator, "tcmalloc"))
     return true;
 #endif
   return false;
 }
 
 bool CallocDiesOnOOM() {
-// The sanitizers' calloc dies on OOM instead of returning NULL.
 // The wrapper function in base/process_util_linux.cc that is used when we
 // compile without TCMalloc will just die on OOM instead of returning NULL.
-#if defined(ADDRESS_SANITIZER) || defined(MEMORY_SANITIZER) || \
-    defined(THREAD_SANITIZER) || (defined(OS_LINUX) && defined(NO_TCMALLOC))
+// This function is explicitly disabled if we compile with AddressSanitizer,
+// MemorySanitizer or ThreadSanitizer.
+#if defined(OS_LINUX) && defined(NO_TCMALLOC) && \
+    (!defined(ADDRESS_SANITIZER) && \
+     !defined(MEMORY_SANITIZER) && \
+     !defined(THREAD_SANITIZER))
   return true;
 #else
   return false;
 #endif
 }
 
 // Fake test that allow to know the state of TCMalloc by looking at bots.
 TEST(SecurityTest, TCMALLOC_TEST(IsTCMallocDynamicallyBypassed)) {
   printf("Malloc is dynamically bypassed: %s\n",
          IsTcMallocBypassed() ? "yes." : "no.");
@@ skipping 201 matching lines @@
   // kRandomMask, so we use it as an additional detection mechanism.
   const uintptr_t kRandomMask = 0x3fffffffffffULL;
   bool impossible_random_address =
       reinterpret_cast<uintptr_t>(ptr.get()) & ~kRandomMask;
   EXPECT_FALSE(impossible_random_address);
 }
 
 #endif  // (defined(OS_LINUX) || defined(OS_CHROMEOS)) && defined(__x86_64__)
 
 }  // namespace