mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 12:19:46 +00:00
122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
/*
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* Copyright (C) 2013-2018 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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#include "config.h"
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#include "FTLOSRExit.h"
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#if ENABLE(FTL_JIT)
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#include "AirGenerationContext.h"
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#include "B3StackmapGenerationParams.h"
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#include "B3StackmapValue.h"
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#include "CodeBlock.h"
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#include "DFGBasicBlock.h"
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#include "DFGNode.h"
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#include "FTLExitArgument.h"
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#include "FTLJITCode.h"
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#include "FTLLocation.h"
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#include "FTLState.h"
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#include "JSCInlines.h"
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namespace JSC { namespace FTL {
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using namespace B3;
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using namespace DFG;
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OSRExitDescriptor::OSRExitDescriptor(
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DataFormat profileDataFormat, MethodOfGettingAValueProfile valueProfile,
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unsigned numberOfArguments, unsigned numberOfLocals)
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: m_profileDataFormat(profileDataFormat)
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, m_valueProfile(valueProfile)
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, m_values(numberOfArguments, numberOfLocals)
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{
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}
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void OSRExitDescriptor::validateReferences(const TrackedReferences& trackedReferences)
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{
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for (unsigned i = m_values.size(); i--;)
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m_values[i].validateReferences(trackedReferences);
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for (ExitTimeObjectMaterialization* materialization : m_materializations)
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materialization->validateReferences(trackedReferences);
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}
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Ref<OSRExitHandle> OSRExitDescriptor::emitOSRExit(
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State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin, CCallHelpers& jit,
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const StackmapGenerationParams& params, unsigned offset)
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{
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Ref<OSRExitHandle> handle =
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prepareOSRExitHandle(state, exitKind, nodeOrigin, params, offset);
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handle->emitExitThunk(state, jit);
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return handle;
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}
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Ref<OSRExitHandle> OSRExitDescriptor::emitOSRExitLater(
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State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin,
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const StackmapGenerationParams& params, unsigned offset)
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{
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RefPtr<OSRExitHandle> handle =
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prepareOSRExitHandle(state, exitKind, nodeOrigin, params, offset);
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params.addLatePath(
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[handle, &state] (CCallHelpers& jit) {
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handle->emitExitThunk(state, jit);
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});
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return handle.releaseNonNull();
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}
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Ref<OSRExitHandle> OSRExitDescriptor::prepareOSRExitHandle(
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State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin,
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const StackmapGenerationParams& params, unsigned offset)
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{
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unsigned index = state.jitCode->osrExit.size();
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OSRExit& exit = state.jitCode->osrExit.alloc(
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this, exitKind, nodeOrigin.forExit, nodeOrigin.semantic, nodeOrigin.wasHoisted);
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Ref<OSRExitHandle> handle = adoptRef(*new OSRExitHandle(index, exit));
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for (unsigned i = offset; i < params.size(); ++i)
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exit.m_valueReps.append(params[i]);
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exit.m_valueReps.shrinkToFit();
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return handle;
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}
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OSRExit::OSRExit(
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OSRExitDescriptor* descriptor, ExitKind exitKind, CodeOrigin codeOrigin,
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CodeOrigin codeOriginForExitProfile, bool wasHoisted)
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: OSRExitBase(exitKind, codeOrigin, codeOriginForExitProfile, wasHoisted)
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, m_descriptor(descriptor)
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{
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}
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CodeLocationJump<JSInternalPtrTag> OSRExit::codeLocationForRepatch(CodeBlock* ftlCodeBlock) const
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{
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UNUSED_PARAM(ftlCodeBlock);
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return m_patchableJump;
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}
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} } // namespace JSC::FTL
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#endif // ENABLE(FTL_JIT)
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