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 41 static Mutex& registerFileStatisticsMutex() 42 { 43 DEFINE_STATIC_LOCAL(Mutex, staticMutex, ()); 44 return staticMutex; 45 } 46 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 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 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 73 void RegisterFile::setGlobalObject(JSGlobalObject* globalObject) 74 { 75 m_globalObject.set(globalObject->globalData(), globalObject, &m_globalObjectOwner, this); 76 } 77 78 JSGlobalObject* RegisterFile::globalObject() 79 { 80 return m_globalObject.get(); 81 } 82 83 void RegisterFile::initializeThreading() 84 { 85 registerFileStatisticsMutex(); 86 } 87 88 size_t RegisterFile::committedByteCount() 89 { 90 MutexLocker locker(registerFileStatisticsMutex()); 91 return committedBytesCount; 92 } 93 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