Add thread-safety to creation of MemCopy and modulo functions.

test/cctest/test-utils.cc

 // Copyright 2006-2008 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 71 matching lines @@
 
 
 void TestMemCopy(Vector<byte> src,
                  Vector<byte> dst,
                  int source_alignment,
                  int destination_alignment,
                  int length_alignment) {
   memset(dst.start(), 0xFF, dst.length());
   byte* to = dst.start() + 32 + destination_alignment;
   byte* from = src.start() + source_alignment;
-  int length = kMinComplexMemCopy + length_alignment;
-  MemCopy(to, from, static_cast<size_t>(length));
+  int length = OS::kMinComplexMemCopy + length_alignment;
+  OS::MemCopy(to, from, static_cast<size_t>(length));
   printf("[%d,%d,%d]\n",
          source_alignment, destination_alignment, length_alignment);
   for (int i = 0; i < length; i++) {
     CHECK_EQ(from[i], to[i]);
   }
   CHECK_EQ(0xFF, to[-1]);
   CHECK_EQ(0xFF, to[length]);
 }
 
 
 
 TEST(MemCopy) {
   OS::Setup();
-  const int N = kMinComplexMemCopy + 128;
+  const int N = OS::kMinComplexMemCopy + 128;
   Vector<byte> buffer1 = Vector<byte>::New(N);
   Vector<byte> buffer2 = Vector<byte>::New(N);
 
   for (int i = 0; i < N; i++) {
     buffer1[i] = static_cast<byte>(i & 0x7F);
   }
 
   // Same alignment.
   for (int i = 0; i < 32; i++) {
     TestMemCopy(buffer1, buffer2, i, i, i * 2);
@@ skipping 68 matching lines @@
   int offset = 0;
   for (int loop = 0; loop < kLoops; loop++) {
     int seq_length = loop % kMaxSequenceSize;
     for (int j = 0; j < seq_length; j++) {
       CHECK_EQ(j, result[offset]);
       offset++;
     }
   }
   result.Dispose();
 }