WebKit/Source/JavaScriptCore/ftl/FTLLazySlowPath.cpp at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

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* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

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* 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,

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#include "config.h"

#include "FTLLazySlowPath.h"

#if ENABLE(FTL_JIT)

#include "LinkBuffer.h"

#include <wtf/TZoneMallocInlines.h>

namespace JSC { namespace FTL {

WTF_MAKE_TZONE_ALLOCATED_IMPL(LazySlowPath);

LazySlowPath::~LazySlowPath() = default;

void LazySlowPath::initialize(

CodeLocationJump<JSInternalPtrTag> patchableJump, CodeLocationLabel<JSInternalPtrTag> done,

CodeLocationLabel<ExceptionHandlerPtrTag> exceptionTarget,

const RegisterSet& usedRegisters, CallSiteIndex callSiteIndex, RefPtr<Generator> generator

)

{

m_patchableJump = patchableJump;

m_done = done;

m_exceptionTarget = exceptionTarget;

m_usedRegisters = usedRegisters.toScalarRegisterSet();

m_callSiteIndex = callSiteIndex;

m_generator = generator;

}

void LazySlowPath::generate(CodeBlock* codeBlock)

{

RELEASE_ASSERT(!m_stub);

CCallHelpers jit(codeBlock);

GenerationParams params;

CCallHelpers::JumpList exceptionJumps;

params.exceptionJumps = m_exceptionTarget ? &exceptionJumps : nullptr;

params.lazySlowPath = this;

m_generator->run(jit, params);

params.doneJumps.linkThunk(m_done, &jit);

if (m_exceptionTarget)

exceptionJumps.linkThunk(m_exceptionTarget, &jit);

LinkBuffer linkBuffer(jit, codeBlock, LinkBuffer::Profile::FTLThunk, JITCompilationMustSucceed);

m_stub = FINALIZE_CODE_FOR(codeBlock, linkBuffer, JITStubRoutinePtrTag, nullptr, "Lazy slow path call stub");

MacroAssembler::repatchJump(m_patchableJump, CodeLocationLabel<JITStubRoutinePtrTag>(m_stub.code()));

}

} } // namespace JSC::FTL

#endif // ENABLE(FTL_JIT)

WebKit/Source/JavaScriptCore/ftl/FTLLazySlowPath.cpp at main · WebKit/WebKit · GitHub

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