Parallelize marking phase of mark-sweep/compact collection cycle.

test/cctest/test-heap.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "execution.h"
 #include "factory.h"
 #include "macro-assembler.h"
 #include "global-handles.h"
@@ skipping 944 matching lines @@
   Address clone_addr = clone->address();
   Page* page = Page::FromAddress(clone_addr);
   // Check that region covering inobject property 1 is marked dirty.
   CHECK(page->IsRegionDirty(clone_addr + (object_size - kPointerSize)));
 }
 
 TEST(TestCodeFlushing) {
   i::FLAG_allow_natives_syntax = true;
   // If we do not flush code this test is invalid.
   if (!FLAG_flush_code) return;
+  // Code flushing does not work predictably with parallel marking.
+  if (FLAG_parallel_marking) return;
   InitializeVM();
   v8::HandleScope scope;
   const char* source = "function foo() {"
                        "  var x = 42;"
                        "  var y = 42;"
                        "  var z = x + y;"
                        "};"
                        "foo()";
   Handle<String> foo_name = Factory::LookupAsciiSymbol("foo");
 
@@ skipping 19 matching lines @@
   Heap::CollectAllGarbage(true);
 
   // foo should no longer be in the compilation cache
   CHECK(!function->shared()->is_compiled());
   CHECK(!function->is_compiled());
   // Call foo to get it recompiled.
   CompileRun("foo()");
   CHECK(function->shared()->is_compiled());
   CHECK(function->is_compiled());
 }