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      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