1 /*
2 * Copyright (C) 2008 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "config.h"
30 #include "RegisterFile.h"
31
32 #include "ConservativeRoots.h"
33 #include "Interpreter.h"
34 #include "JSGlobalData.h"
35 #include "JSGlobalObject.h"
36
37 namespace JSC {
38
39 static size_t committedBytesCount = 0;
40
registerFileStatisticsMutex()41 static Mutex& registerFileStatisticsMutex()
42 {
43 DEFINE_STATIC_LOCAL(Mutex, staticMutex, ());
44 return staticMutex;
45 }
46
~RegisterFile()47 RegisterFile::~RegisterFile()
48 {
49 void* base = m_reservation.base();
50 m_reservation.decommit(base, reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(base));
51 addToCommittedByteCount(-(reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(base)));
52 m_reservation.deallocate();
53 }
54
gatherConservativeRoots(ConservativeRoots & conservativeRoots)55 void RegisterFile::gatherConservativeRoots(ConservativeRoots& conservativeRoots)
56 {
57 for (Register* it = start(); it != end(); ++it) {
58 JSValue v = it->jsValue();
59 if (!v.isCell())
60 continue;
61 conservativeRoots.add(v.asCell());
62 }
63 }
64
releaseExcessCapacity()65 void RegisterFile::releaseExcessCapacity()
66 {
67 m_reservation.decommit(m_start, reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(m_start));
68 addToCommittedByteCount(-(reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(m_start)));
69 m_commitEnd = m_start;
70 m_maxUsed = m_start;
71 }
72
setGlobalObject(JSGlobalObject * globalObject)73 void RegisterFile::setGlobalObject(JSGlobalObject* globalObject)
74 {
75 m_globalObject.set(globalObject->globalData(), globalObject, &m_globalObjectOwner, this);
76 }
77
globalObject()78 JSGlobalObject* RegisterFile::globalObject()
79 {
80 return m_globalObject.get();
81 }
82
initializeThreading()83 void RegisterFile::initializeThreading()
84 {
85 registerFileStatisticsMutex();
86 }
87
committedByteCount()88 size_t RegisterFile::committedByteCount()
89 {
90 MutexLocker locker(registerFileStatisticsMutex());
91 return committedBytesCount;
92 }
93
addToCommittedByteCount(long byteCount)94 void RegisterFile::addToCommittedByteCount(long byteCount)
95 {
96 MutexLocker locker(registerFileStatisticsMutex());
97 ASSERT(static_cast<long>(committedBytesCount) + byteCount > -1);
98 committedBytesCount += byteCount;
99 }
100
101 } // namespace JSC
102