1 /* 2 * Copyright (C) 2010 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 * 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. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 28 #include "HandleStack.h" 29 30 #include "MarkStack.h" 31 32 namespace JSC { 33 34 HandleStack::HandleStack() 35 #ifndef NDEBUG 36 : m_scopeDepth(0) 37 #endif 38 { 39 grow(); 40 } 41 42 void HandleStack::mark(HeapRootMarker& heapRootMarker) 43 { 44 const Vector<HandleSlot>& blocks = m_blockStack.blocks(); 45 size_t blockLength = m_blockStack.blockLength; 46 47 int end = blocks.size() - 1; 48 for (int i = 0; i < end; ++i) { 49 HandleSlot block = blocks[i]; 50 heapRootMarker.mark(block, blockLength); 51 } 52 HandleSlot block = blocks[end]; 53 heapRootMarker.mark(block, m_frame.m_next - block); 54 } 55 56 void HandleStack::grow() 57 { 58 HandleSlot block = m_blockStack.grow(); 59 m_frame.m_next = block; 60 m_frame.m_end = block + m_blockStack.blockLength; 61 } 62 63 } 64