Fix for 3303 MultithreadedParallelIsolates has a race condition.

src/objects-debug.cc

 // Copyright 2012 the V8 project 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 "v8.h"
 
 #include "disassembler.h"
 #include "disasm.h"
 #include "jsregexp.h"
 #include "macro-assembler.h"
@@ skipping 609 matching lines @@
   VerifyObjectField(kValueOffset);
   VerifyObjectField(kTypeOffset);
 }
 
 
 void Code::CodeVerify() {
   CHECK(IsAligned(reinterpret_cast<intptr_t>(instruction_start()),
                   kCodeAlignment));
   relocation_info()->ObjectVerify();
   Address last_gc_pc = NULL;
+  Isolate* isolate = GetIsolate();
   for (RelocIterator it(this); !it.done(); it.next()) {
-    it.rinfo()->Verify();
+    it.rinfo()->Verify(isolate);
     // Ensure that GC will not iterate twice over the same pointer.
     if (RelocInfo::IsGCRelocMode(it.rinfo()->rmode())) {
       CHECK(it.rinfo()->pc() != last_gc_pc);
       last_gc_pc = it.rinfo()->pc();
     }
   }
 }
 
 
 void Code::VerifyEmbeddedObjectsDependency() {
@@ skipping 553 matching lines @@
   for (int i = 0; i < number_of_transitions(); ++i) {
     if (!CheckOneBackPointer(current_map, GetTarget(i))) return false;
   }
   return true;
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal