1/*
2 * Copyright (C) 2016-2017 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "Heap.h"
29#include "VM.h"
30#include "WasmIndexOrName.h"
31#include "WriteBarrier.h"
32#include <limits.h>
33
34namespace JSC {
35
36class CodeBlock;
37class JSObject;
38class SlotVisitor;
39
40class StackFrame {
41public:
42 StackFrame(VM&, JSCell* owner, JSCell* callee);
43 StackFrame(VM&, JSCell* owner, JSCell* callee, CodeBlock*, unsigned bytecodeOffset);
44 StackFrame(Wasm::IndexOrName);
45
46 bool hasLineAndColumnInfo() const { return !!m_codeBlock; }
47
48 void computeLineAndColumn(unsigned& line, unsigned& column) const;
49 String functionName(VM&) const;
50 intptr_t sourceID() const;
51 String sourceURL() const;
52 String toString(VM&) const;
53
54 bool hasBytecodeOffset() const { return m_bytecodeOffset != UINT_MAX && !m_isWasmFrame; }
55 unsigned bytecodeOffset()
56 {
57 ASSERT(hasBytecodeOffset());
58 return m_bytecodeOffset;
59 }
60
61 void visitChildren(SlotVisitor&);
62 bool isMarked(VM& vm) const { return (!m_callee || vm.heap.isMarked(m_callee.get())) && (!m_codeBlock || vm.heap.isMarked(m_codeBlock.get())); }
63
64private:
65 WriteBarrier<JSCell> m_callee { };
66 WriteBarrier<CodeBlock> m_codeBlock { };
67 Wasm::IndexOrName m_wasmFunctionIndexOrName;
68 unsigned m_bytecodeOffset { UINT_MAX };
69 bool m_isWasmFrame { false };
70};
71
72} // namespace JSC
73
74