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/*
* Copyright (C) 2015-2023 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.
*/
#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 RegisterSetBuilder& usedRegisters, CallSiteIndex callSiteIndex, RefPtr<Generator> generator
)
{
m_patchableJump = patchableJump;
m_done = done;
m_exceptionTarget = exceptionTarget;
m_usedRegisters = usedRegisters.buildScalarRegisterSet();
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)
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