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93a37866 | 1 | /* |
81345200 | 2 | * Copyright (C) 2012, 2013 Apple Inc. All rights reserved. |
93a37866 A |
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> |
93a37866 A |
30 | #include <wtf/PassRefPtr.h> |
31 | ||
32 | namespace JSC { | |
33 | ||
34 | Watchpoint::~Watchpoint() | |
35 | { | |
36 | if (isOnList()) | |
37 | remove(); | |
38 | } | |
39 | ||
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40 | WatchpointSet::WatchpointSet(WatchpointState state) |
41 | : m_state(state) | |
42 | , m_setIsNotEmpty(false) | |
93a37866 A |
43 | { |
44 | } | |
45 | ||
46 | WatchpointSet::~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(); | |
93a37866 A |
54 | } |
55 | ||
56 | void WatchpointSet::add(Watchpoint* watchpoint) | |
57 | { | |
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58 | ASSERT(!isCompilationThread()); |
59 | ASSERT(state() != IsInvalidated); | |
93a37866 A |
60 | if (!watchpoint) |
61 | return; | |
62 | m_set.push(watchpoint); | |
81345200 A |
63 | m_setIsNotEmpty = true; |
64 | m_state = IsWatched; | |
93a37866 A |
65 | } |
66 | ||
81345200 | 67 | void WatchpointSet::fireAllSlow() |
93a37866 | 68 | { |
81345200 | 69 | ASSERT(state() == IsWatched); |
93a37866 | 70 | |
81345200 | 71 | WTF::storeStoreFence(); |
93a37866 | 72 | fireAllWatchpoints(); |
81345200 A |
73 | m_state = IsInvalidated; |
74 | WTF::storeStoreFence(); | |
93a37866 A |
75 | } |
76 | ||
77 | void WatchpointSet::fireAllWatchpoints() | |
78 | { | |
79 | while (!m_set.isEmpty()) | |
80 | m_set.begin()->fire(); | |
81 | } | |
82 | ||
83 | void InlineWatchpointSet::add(Watchpoint* watchpoint) | |
84 | { | |
85 | inflate()->add(watchpoint); | |
86 | } | |
87 | ||
88 | WatchpointSet* InlineWatchpointSet::inflateSlow() | |
89 | { | |
90 | ASSERT(isThin()); | |
81345200 A |
91 | ASSERT(!isCompilationThread()); |
92 | WatchpointSet* fat = adoptRef(new WatchpointSet(decodeState(m_data))).leakRef(); | |
93 | WTF::storeStoreFence(); | |
93a37866 A |
94 | m_data = bitwise_cast<uintptr_t>(fat); |
95 | return fat; | |
96 | } | |
97 | ||
98 | void InlineWatchpointSet::freeFat() | |
99 | { | |
100 | ASSERT(isFat()); | |
101 | fat()->deref(); | |
102 | } | |
103 | ||
104 | } // namespace JSC | |
105 |