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/*
* Copyright (C) 2013-2018 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 "FTLOSRExit.h"
#if ENABLE(FTL_JIT)
#include "B3StackmapGenerationParams.h"
#include "FTLJITCode.h"
#include "FTLState.h"
namespace JSC { namespace FTL {
using namespace B3;
using namespace DFG;
OSRExitDescriptor::OSRExitDescriptor(
DataFormat profileDataFormat, MethodOfGettingAValueProfile valueProfile,
unsigned numberOfArguments, unsigned numberOfLocals, unsigned numberOfTmps)
: m_profileDataFormat(profileDataFormat)
, m_valueProfile(valueProfile)
, m_values(numberOfArguments, numberOfLocals, numberOfTmps)
{
}
void OSRExitDescriptor::validateReferences(const TrackedReferences& trackedReferences)
{
for (unsigned i = m_values.size(); i--;)
m_values[i].validateReferences(trackedReferences);
for (ExitTimeObjectMaterialization* materialization : m_materializations)
materialization->validateReferences(trackedReferences);
}
Ref<OSRExitHandle> OSRExitDescriptor::emitOSRExit(
State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin, CCallHelpers& jit,
const StackmapGenerationParams& params, uint32_t dfgNodeIndex, unsigned offset)
{
Ref<OSRExitHandle> handle =
prepareOSRExitHandle(state, exitKind, nodeOrigin, params, dfgNodeIndex, offset);
handle->emitExitThunk(state, jit);
return handle;
}
Ref<OSRExitHandle> OSRExitDescriptor::emitOSRExitLater(
State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin,
const StackmapGenerationParams& params, uint32_t dfgNodeIndex, unsigned offset)
{
RefPtr<OSRExitHandle> handle =
prepareOSRExitHandle(state, exitKind, nodeOrigin, params, dfgNodeIndex, offset);
params.addLatePath(
[handle, &state] (CCallHelpers& jit) {
handle->emitExitThunk(state, jit);
});
return handle.releaseNonNull();
}
Ref<OSRExitHandle> OSRExitDescriptor::prepareOSRExitHandle(
State& state, ExitKind exitKind, const NodeOrigin& nodeOrigin,
const StackmapGenerationParams& params, uint32_t dfgNodeIndex, unsigned offset)
{
FixedVector<B3::ValueRep> valueReps(params.size() - offset);
for (unsigned i = offset, indexInValueReps = 0; i < params.size(); ++i, ++indexInValueReps)
valueReps[indexInValueReps] = params[i];
unsigned index = state.jitCode->m_osrExit.size();
state.jitCode->m_osrExit.append(OSRExit(this, exitKind, nodeOrigin.forExit, nodeOrigin.semantic, nodeOrigin.wasHoisted, dfgNodeIndex, WTFMove(valueReps)));
return adoptRef(*new OSRExitHandle(index, state.jitCode.get()));
}
OSRExit::OSRExit(
OSRExitDescriptor* descriptor, ExitKind exitKind, CodeOrigin codeOrigin,
CodeOrigin codeOriginForExitProfile, bool wasHoisted, uint32_t dfgNodeIndex, FixedVector<B3::ValueRep>&& valueReps)
: OSRExitBase(exitKind, codeOrigin, codeOriginForExitProfile, wasHoisted, dfgNodeIndex)
, m_descriptor(descriptor)
, m_valueReps(WTFMove(valueReps))
{
}
CodeLocationJump<JSInternalPtrTag> OSRExit::codeLocationForRepatch(CodeBlock* ftlCodeBlock) const
{
UNUSED_PARAM(ftlCodeBlock);
return m_patchableJump;
}
} } // namespace JSC::FTL
#endif // ENABLE(FTL_JIT)
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