[msan] Do not unpoison heap if running on simulator.

src/msan.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // MemorySanitizer support.
 
 #ifndef V8_MSAN_H_
 #define V8_MSAN_H_
 
+#include "globals.h"
+
 #ifndef __has_feature
 # define __has_feature(x) 0
 #endif
 
 #if __has_feature(memory_sanitizer) && !defined(MEMORY_SANITIZER)
 # define MEMORY_SANITIZER
 #endif
 
-#ifdef MEMORY_SANITIZER
-# include <sanitizer/msan_interface.h>
+#if defined(MEMORY_SANITIZER) && !defined(USE_SIMULATOR)
+# include <sanitizer/msan_interface.h>  // NOLINT
 // Marks a memory range as fully initialized.
-# define MSAN_MEMORY_IS_INITIALIZED(p, s) __msan_unpoison((p), (s))
+# define MSAN_MEMORY_IS_INITIALIZED_IN_JIT(p, s) __msan_unpoison((p), (s))
 #else
-# define MSAN_MEMORY_IS_INITIALIZED(p, s)
+# define MSAN_MEMORY_IS_INITIALIZED_IN_JIT(p, s)
 #endif
 
 #endif  // V8_MSAN_H_