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1 /*
2  * Copyright (C) 2014 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include "config.h"
32 #include "platform/heap/Visitor.h"
33 
34 #include "platform/heap/Handle.h"
35 #include "platform/heap/Heap.h"
36 
37 namespace blink {
38 
39 #if ENABLE(ASSERT)
checkGCInfo(const void * payload,const GCInfo * gcInfo)40 void Visitor::checkGCInfo(const void* payload, const GCInfo* gcInfo)
41 {
42     FinalizedHeapObjectHeader::fromPayload(payload)->checkHeader();
43 #if !defined(COMPONENT_BUILD)
44     // On component builds we cannot compare the gcInfos as they are statically
45     // defined in each of the components and hence will not match.
46     BaseHeapPage* page = pageHeaderFromObject(payload);
47     ASSERT(page->orphaned() || FinalizedHeapObjectHeader::fromPayload(payload)->gcInfo() == gcInfo);
48 #endif
49 }
50 
51 #define DEFINE_VISITOR_CHECK_MARKER(Type)                                \
52     void Visitor::checkGCInfo(const Type* payload, const GCInfo* gcInfo) \
53     {                                                                    \
54         HeapObjectHeader::fromPayload(payload)->checkHeader();           \
55         Type* object = const_cast<Type*>(payload);                       \
56         BaseHeapPage* page = pageHeaderFromObject(object);               \
57         ASSERT(page->orphaned() || page->gcInfo() == gcInfo);            \
58     }
59 
60 FOR_EACH_TYPED_HEAP(DEFINE_VISITOR_CHECK_MARKER)
61 #undef DEFINE_VISITOR_CHECK_MARKER
62 #endif
63 
64 }
65