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/*
* Copyright (C) 2021 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 "BaselineJITPlan.h"
#include "JITSafepoint.h"
#if ENABLE(JIT)
namespace JSC {
BaselineJITPlan::BaselineJITPlan(CodeBlock* codeBlock)
: JITPlan(JITCompilationMode::Baseline, codeBlock)
{
JIT::doMainThreadPreparationBeforeCompile(codeBlock->vm());
}
auto BaselineJITPlan::compileInThreadImpl(JITCompilationEffort effort) -> CompilationPath
{
// BaselineJITPlan can keep underlying CodeBlock alive while running.
// So we do not need to suspend this compilation thread while running GC.
Safepoint::Result result;
{
Safepoint safepoint(*this, result);
safepoint.begin(false);
JIT jit(*m_vm, *this, m_codeBlock);
auto jitCode = jit.compileAndLinkWithoutFinalizing(effort);
m_jitCode = WTFMove(jitCode);
}
if (result.didGetCancelled())
return CancelPath;
return BaselinePath;
}
auto BaselineJITPlan::compileInThreadImpl() -> CompilationPath
{
return compileInThreadImpl(JITCompilationCanFail);
}
auto BaselineJITPlan::compileSync(JITCompilationEffort effort) -> CompilationPath
{
return compileInThreadImpl(effort);
}
size_t BaselineJITPlan::codeSize() const
{
if (m_jitCode)
return m_jitCode->size();
return 0;
}
bool BaselineJITPlan::isKnownToBeLiveAfterGC()
{
// If stage is not JITPlanStage::Canceled, we should keep this alive and mark underlying CodeBlock anyway.
// Regardless of whether the owner ScriptExecutable / CodeBlock dies, compiled code would be still usable
// since Baseline JIT is *unlinked*. So, let's not stop compilation.
return m_stage != JITPlanStage::Canceled;
}
bool BaselineJITPlan::isKnownToBeLiveDuringGC(AbstractSlotVisitor&)
{
// Ditto to isKnownToBeLiveAfterGC. Unless plan gets completely cancelled before running, we should keep compilation running.
return m_stage != JITPlanStage::Canceled;
}
CompilationResult BaselineJITPlan::finalize()
{
CompilationResult result = JIT::finalizeOnMainThread(m_codeBlock, *this, m_jitCode);
switch (result) {
case CompilationFailed:
CODEBLOCK_LOG_EVENT(m_codeBlock, "delayJITCompile", ("compilation failed"));
dataLogLnIf(Options::verboseOSR(), " JIT compilation failed.");
m_codeBlock->dontJITAnytimeSoon();
m_codeBlock->m_didFailJITCompilation = true;
break;
case CompilationSuccessful:
WTF::crossModifyingCodeFence();
dataLogLnIf(Options::verboseOSR(), " JIT compilation successful.");
m_codeBlock->ownerExecutable()->installCode(m_codeBlock);
m_codeBlock->jitSoon();
break;
default:
RELEASE_ASSERT_NOT_REACHED();
break;
}
return result;
}
} // namespace JSC
#endif // ENABLE(JIT)
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