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
HandleStack()34 HandleStack::HandleStack()
35 #ifndef NDEBUG
36 : m_scopeDepth(0)
37 #endif
38 {
39 grow();
40 }
41
mark(HeapRootMarker & heapRootMarker)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
grow()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