1/* 2 * Copyright (C) 2012, 2013 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 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 "JSSegmentedVariableObject.h" 31 32#include "JSCInlines.h" 33 34namespace JSC { 35 36int JSSegmentedVariableObject::findRegisterIndex(void* registerAddress) 37{ 38 ConcurrentJITLocker locker(m_lock); 39 40 for (int i = m_registers.size(); i--;) { 41 if (&m_registers[i] != registerAddress) 42 continue; 43 return i; 44 } 45 CRASH(); 46 return -1; 47} 48 49int JSSegmentedVariableObject::addRegisters(int numberOfRegistersToAdd) 50{ 51 ConcurrentJITLocker locker(m_lock); 52 53 ASSERT(numberOfRegistersToAdd >= 0); 54 55 size_t oldSize = m_registers.size(); 56 m_registers.grow(oldSize + numberOfRegistersToAdd); 57 58 for (size_t i = numberOfRegistersToAdd; i--;) 59 m_registers[oldSize + i].setWithoutWriteBarrier(jsUndefined()); 60 61 return static_cast<int>(oldSize); 62} 63 64void JSSegmentedVariableObject::visitChildren(JSCell* cell, SlotVisitor& slotVisitor) 65{ 66 JSSegmentedVariableObject* thisObject = jsCast<JSSegmentedVariableObject*>(cell); 67 ASSERT_GC_OBJECT_INHERITS(thisObject, info()); 68 COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag); 69 ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren()); 70 JSSymbolTableObject::visitChildren(thisObject, slotVisitor); 71 72 for (unsigned i = thisObject->m_registers.size(); i--;) 73 slotVisitor.append(&thisObject->m_registers[i]); 74} 75 76} // namespace JSC 77 78