1 files changed, 64 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/platform/heap/Visitor.cpp b/chromium/third_party/WebKit/Source/platform/heap/Visitor.cpp
new file mode 100644
index 00000000000..6e1c337efe0
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/platform/heap/Visitor.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2014 Google Inc. 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 with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * 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.
+ */
+
+#include "config.h"
+#include "platform/heap/Visitor.h"
+
+#include "platform/heap/Handle.h"
+#include "platform/heap/Heap.h"
+
+namespace WebCore {
+
+#ifndef NDEBUG
+void Visitor::checkGCInfo(const void* payload, const GCInfo* gcInfo)
+{
+    FinalizedHeapObjectHeader::fromPayload(payload)->checkHeader();
+#if !defined(COMPONENT_BUILD)
+    // On component builds we cannot compare the gcInfos as they are statically
+    // defined in each of the components and hence will not match.
+    ASSERT(FinalizedHeapObjectHeader::fromPayload(payload)->gcInfo() == gcInfo);
+#endif
+}
+
+#define DEFINE_VISITOR_CHECK_MARKER(Type)                                    \
+    void Visitor::checkGCInfo(const Type* payload, const GCInfo* gcInfo)     \
+    {                                                                        \
+        HeapObjectHeader::fromPayload(payload)->checkHeader();               \
+        Type* object = const_cast<Type*>(payload);                           \
+        Address addr = pageHeaderAddress(reinterpret_cast<Address>(object)); \
+        BaseHeapPage* page = reinterpret_cast<BaseHeapPage*>(addr);          \
+        ASSERT(page->gcInfo() == gcInfo);                                    \
+    }
+
+FOR_EACH_TYPED_HEAP(DEFINE_VISITOR_CHECK_MARKER)
+#undef DEFINE_VISITOR_CHECK_MARKER
+#endif
+
+}