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/*
* Copyright (C) 2016-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "Strong.h"
#include "WasmIndexOrName.h"
#include <limits.h>
namespace JSC {
class CodeBlock;
class JSObject;
class StackFrame {
public:
StackFrame()
: m_bytecodeOffset(UINT_MAX)
{ }
StackFrame(VM& vm, JSCell* callee)
: m_callee(vm, callee)
, m_bytecodeOffset(UINT_MAX)
{ }
StackFrame(VM& vm, JSCell* callee, CodeBlock* codeBlock, unsigned bytecodeOffset)
: m_callee(vm, callee)
, m_codeBlock(vm, codeBlock)
, m_bytecodeOffset(bytecodeOffset)
{ }
static StackFrame wasm(Wasm::IndexOrName indexOrName)
{
StackFrame result;
result.m_isWasmFrame = true;
result.m_wasmFunctionIndexOrName = indexOrName;
return result;
}
bool hasLineAndColumnInfo() const { return !!m_codeBlock; }
void computeLineAndColumn(unsigned& line, unsigned& column) const;
String functionName(VM&) const;
intptr_t sourceID() const;
String sourceURL() const;
String toString(VM&) const;
bool hasBytecodeOffset() const { return m_bytecodeOffset != UINT_MAX && !m_isWasmFrame; }
unsigned bytecodeOffset()
{
ASSERT(hasBytecodeOffset());
return m_bytecodeOffset;
}
private:
Strong<JSCell> m_callee { };
Strong<CodeBlock> m_codeBlock { };
union {
unsigned m_bytecodeOffset;
Wasm::IndexOrName m_wasmFunctionIndexOrName;
};
bool m_isWasmFrame { false };
};
} // namespace JSC
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