1/*
2 * Copyright (C) 2012 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "StructureStubClearingWatchpoint.h"
28
29#if ENABLE(JIT)
30
31#include "CodeBlock.h"
32#include "JSCInlines.h"
33#include "StructureStubInfo.h"
34
35namespace JSC {
36
37StructureStubClearingWatchpoint::~StructureStubClearingWatchpoint() { }
38
39StructureStubClearingWatchpoint* StructureStubClearingWatchpoint::push(
40    WatchpointsOnStructureStubInfo& holder,
41    OwnPtr<StructureStubClearingWatchpoint>& head)
42{
43    head = adoptPtr(new StructureStubClearingWatchpoint(holder, head.release()));
44    return head.get();
45}
46
47void StructureStubClearingWatchpoint::fireInternal()
48{
49    // This will implicitly cause my own demise: stub reset removes all watchpoints.
50    // That works, because deleting a watchpoint removes it from the set's list, and
51    // the set's list traversal for firing is robust against the set changing.
52    m_holder.codeBlock()->resetStub(*m_holder.stubInfo());
53}
54
55WatchpointsOnStructureStubInfo::~WatchpointsOnStructureStubInfo()
56{
57}
58
59StructureStubClearingWatchpoint* WatchpointsOnStructureStubInfo::addWatchpoint()
60{
61    return StructureStubClearingWatchpoint::push(*this, m_head);
62}
63
64StructureStubClearingWatchpoint* WatchpointsOnStructureStubInfo::ensureReferenceAndAddWatchpoint(
65    RefPtr<WatchpointsOnStructureStubInfo>& holderRef, CodeBlock* codeBlock,
66    StructureStubInfo* stubInfo)
67{
68    if (!holderRef)
69        holderRef = adoptRef(new WatchpointsOnStructureStubInfo(codeBlock, stubInfo));
70    else {
71        ASSERT(holderRef->m_codeBlock == codeBlock);
72        ASSERT(holderRef->m_stubInfo == stubInfo);
73    }
74
75    return holderRef->addWatchpoint();
76}
77
78} // namespace JSC
79
80#endif // ENABLE(JIT)
81
82