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93a37866 1/*
81345200 2 * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
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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 "Watchpoint.h"
28
81345200 29#include <wtf/CompilationThread.h>
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30#include <wtf/PassRefPtr.h>
31
32namespace JSC {
33
34Watchpoint::~Watchpoint()
35{
36 if (isOnList())
37 remove();
38}
39
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40WatchpointSet::WatchpointSet(WatchpointState state)
41 : m_state(state)
42 , m_setIsNotEmpty(false)
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43{
44}
45
46WatchpointSet::~WatchpointSet()
47{
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48 // Remove all watchpoints, so that they don't try to remove themselves. Note that we
49 // don't fire watchpoints on deletion. We assume that any code that is interested in
50 // watchpoints already also separately has a mechanism to make sure that the code is
51 // either keeping the watchpoint set's owner alive, or does some weak reference thing.
52 while (!m_set.isEmpty())
53 m_set.begin()->remove();
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54}
55
56void WatchpointSet::add(Watchpoint* watchpoint)
57{
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58 ASSERT(!isCompilationThread());
59 ASSERT(state() != IsInvalidated);
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60 if (!watchpoint)
61 return;
62 m_set.push(watchpoint);
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63 m_setIsNotEmpty = true;
64 m_state = IsWatched;
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65}
66
81345200 67void WatchpointSet::fireAllSlow()
93a37866 68{
81345200 69 ASSERT(state() == IsWatched);
93a37866 70
81345200 71 WTF::storeStoreFence();
93a37866 72 fireAllWatchpoints();
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73 m_state = IsInvalidated;
74 WTF::storeStoreFence();
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75}
76
77void WatchpointSet::fireAllWatchpoints()
78{
79 while (!m_set.isEmpty())
80 m_set.begin()->fire();
81}
82
83void InlineWatchpointSet::add(Watchpoint* watchpoint)
84{
85 inflate()->add(watchpoint);
86}
87
88WatchpointSet* InlineWatchpointSet::inflateSlow()
89{
90 ASSERT(isThin());
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91 ASSERT(!isCompilationThread());
92 WatchpointSet* fat = adoptRef(new WatchpointSet(decodeState(m_data))).leakRef();
93 WTF::storeStoreFence();
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94 m_data = bitwise_cast<uintptr_t>(fat);
95 return fat;
96}
97
98void InlineWatchpointSet::freeFat()
99{
100 ASSERT(isFat());
101 fat()->deref();
102}
103
104} // namespace JSC
105