[Mac] Implement base::EnableTerminationOnHeapCorruption() by overriding malloc_error_break().

base/process_util_unittest.cc

 // Copyright (c) 2011 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.
 
 #define _CRT_SECURE_NO_WARNINGS
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/eintr_wrapper.h"
@@ skipping 379 matching lines @@
   ASSERT_TRUE(OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &token));
   std::wstring cmdline =
       this->MakeCmdLine("SimpleChildProcess", false).GetCommandLineString();
   base::LaunchOptions options;
   options.as_user = token;
   EXPECT_TRUE(base::LaunchProcess(cmdline, options, NULL));
 }
 
 #endif  // defined(OS_WIN)
 
+#if defined(OS_MACOSX)
+
+TEST_F(ProcessUtilTest, MacTerminateOnHeapCorruption) {
+  // Note that base::EnableTerminationOnHeapCorruption() is called as part of
+  // test suite setup and does not need to be done again, else mach_override
+  // will fail.
+
+  char buf[3];
+  ASSERT_DEATH(free(buf), "being freed.*"
+      "\\*\\*\\* set a breakpoint in malloc_error_break to debug.*"
+      "Terminating process due to a potential for future heap corruption");
+}
+
+#endif  // defined(OS_MACOSX)
+
 #if defined(OS_POSIX)
 
 namespace {
 
 // Returns the maximum number of files that a process can have open.
 // Returns 0 on error.
 int GetMaxFilesOpenInProcess() {
   struct rlimit rlim;
   if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
     return 0;
@@ skipping 591 matching lines @@
   ASSERT_DEATH({
       SetUpInDeathAssert();
       while ((value_ = base::AllocatePsychoticallyBigObjCObject())) {}
     }, "");
 }
 
 #endif  // !ARCH_CPU_64_BITS
 #endif  // OS_MACOSX
 
 #endif  // !defined(OS_WIN)