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/*
* Copyright (C) 2016-2023 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
#if ENABLE(JIT)
#include "CodeOrigin.h"
#include "MacroAssembler.h"
#include "VM.h"
#include <wtf/Vector.h>
namespace JSC {
#if ENABLE(FTL_JIT) || ENABLE(WEBASSEMBLY_OMGJIT)
namespace B3 {
class PCToOriginMap;
}
#endif
class LinkBuffer;
class PCToCodeOriginMapBuilder;
class PCToCodeOriginMapBuilder {
WTF_MAKE_TZONE_NON_HEAP_ALLOCATABLE(PCToCodeOriginMapBuilder);
WTF_MAKE_NONCOPYABLE(PCToCodeOriginMapBuilder);
friend class PCToCodeOriginMap;
public:
PCToCodeOriginMapBuilder(VM&);
PCToCodeOriginMapBuilder(PCToCodeOriginMapBuilder&& other);
PCToCodeOriginMapBuilder(bool shouldBuildMapping)
: m_shouldBuildMapping(shouldBuildMapping)
{ }
#if ENABLE(FTL_JIT)
enum JSTag { JSCodeOriginMap };
PCToCodeOriginMapBuilder(JSTag, VM&, const B3::PCToOriginMap&);
#endif
#if ENABLE(WEBASSEMBLY_OMGJIT)
enum WasmTag { WasmCodeOriginMap };
PCToCodeOriginMapBuilder(WasmTag, const B3::PCToOriginMap&);
#endif
void appendItem(MacroAssembler::Label label, const CodeOrigin& origin)
{
if (!m_shouldBuildMapping)
return;
appendItemSlow(label, origin);
}
static CodeOrigin defaultCodeOrigin() { return CodeOrigin(BytecodeIndex(0)); }
bool didBuildMapping() const { return m_shouldBuildMapping; }
private:
void appendItemSlow(MacroAssembler::Label, const CodeOrigin&);
struct CodeRange {
MacroAssembler::Label start;
MacroAssembler::Label end;
CodeOrigin codeOrigin;
};
Vector<CodeRange> m_codeRanges;
bool m_shouldBuildMapping;
};
// FIXME: <rdar://problem/39436658>
class PCToCodeOriginMap {
WTF_MAKE_TZONE_ALLOCATED(PCToCodeOriginMap);
WTF_MAKE_NONCOPYABLE(PCToCodeOriginMap);
public:
PCToCodeOriginMap(PCToCodeOriginMapBuilder&&, LinkBuffer&);
~PCToCodeOriginMap();
std::optional<CodeOrigin> findPC(void* pc) const;
double memorySize();
private:
size_t m_compressedPCBufferSize;
size_t m_compressedCodeOriginsSize;
uint8_t* m_compressedPCs;
uint8_t* m_compressedCodeOrigins;
uintptr_t m_pcRangeStart;
uintptr_t m_pcRangeEnd;
};
} // namespace JSC
#endif // ENABLE(JIT)
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