/* * 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