mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/*
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* Copyright (C) 2016-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(JIT)
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#include "CodeOrigin.h"
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#include "MacroAssembler.h"
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#include "VM.h"
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#include <wtf/Vector.h>
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namespace JSC {
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#if ENABLE(FTL_JIT)
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namespace B3 {
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class PCToOriginMap;
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}
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#endif
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class LinkBuffer;
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class PCToCodeOriginMapBuilder;
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class PCToCodeOriginMapBuilder {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(PCToCodeOriginMapBuilder);
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friend class PCToCodeOriginMap;
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public:
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PCToCodeOriginMapBuilder(VM&);
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PCToCodeOriginMapBuilder(PCToCodeOriginMapBuilder&& other);
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#if ENABLE(FTL_JIT)
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PCToCodeOriginMapBuilder(VM&, B3::PCToOriginMap&&);
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#endif
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void appendItem(MacroAssembler::Label, const CodeOrigin&);
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static CodeOrigin defaultCodeOrigin() { return CodeOrigin(BytecodeIndex(0)); }
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bool didBuildMapping() const { return m_shouldBuildMapping; }
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private:
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struct CodeRange {
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MacroAssembler::Label start;
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MacroAssembler::Label end;
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CodeOrigin codeOrigin;
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};
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VM& m_vm;
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Vector<CodeRange> m_codeRanges;
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bool m_shouldBuildMapping;
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};
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// FIXME: <rdar://problem/39436658>
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class PCToCodeOriginMap {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(PCToCodeOriginMap);
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public:
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PCToCodeOriginMap(PCToCodeOriginMapBuilder&&, LinkBuffer&);
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~PCToCodeOriginMap();
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Optional<CodeOrigin> findPC(void* pc) const;
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double memorySize();
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private:
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size_t m_compressedPCBufferSize;
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size_t m_compressedCodeOriginsSize;
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uint8_t* m_compressedPCs;
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uint8_t* m_compressedCodeOrigins;
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uintptr_t m_pcRangeStart;
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uintptr_t m_pcRangeEnd;
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};
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} // namespace JSC
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#endif // ENABLE(JIT)
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