mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-16 13:59:53 +00:00
224 lines
8.3 KiB
C++
224 lines
8.3 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 "JITInlineCacheGenerator.h"
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#if ENABLE(JIT)
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#include "CodeBlock.h"
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#include "InlineAccess.h"
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#include "JSCInlines.h"
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#include "LinkBuffer.h"
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#include "StructureStubInfo.h"
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namespace JSC {
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static StructureStubInfo* garbageStubInfo()
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{
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static StructureStubInfo* stubInfo = new StructureStubInfo(AccessType::Get);
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return stubInfo;
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}
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JITInlineCacheGenerator::JITInlineCacheGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSite, AccessType accessType,
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const RegisterSet& usedRegisters)
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: m_codeBlock(codeBlock)
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{
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m_stubInfo = m_codeBlock ? m_codeBlock->addStubInfo(accessType) : garbageStubInfo();
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m_stubInfo->codeOrigin = codeOrigin;
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m_stubInfo->callSiteIndex = callSite;
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m_stubInfo->patch.usedRegisters = usedRegisters;
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}
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void JITInlineCacheGenerator::finalize(
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LinkBuffer& fastPath, LinkBuffer& slowPath, CodeLocationLabel<JITStubRoutinePtrTag> start)
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{
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m_stubInfo->patch.start = start;
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m_stubInfo->patch.doneLocation = fastPath.locationOf<JSInternalPtrTag>(m_done);
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m_stubInfo->patch.slowPathCallLocation = slowPath.locationOf<JSInternalPtrTag>(m_slowPathCall);
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m_stubInfo->patch.slowPathStartLocation = slowPath.locationOf<JITStubRoutinePtrTag>(m_slowPathBegin);
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}
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JITByIdGenerator::JITByIdGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSite, AccessType accessType,
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const RegisterSet& usedRegisters, JSValueRegs base, JSValueRegs value)
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: JITInlineCacheGenerator(codeBlock, codeOrigin, callSite, accessType, usedRegisters)
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, m_base(base)
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, m_value(value)
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{
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m_stubInfo->patch.baseGPR = base.payloadGPR();
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m_stubInfo->patch.valueGPR = value.payloadGPR();
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m_stubInfo->patch.thisGPR = InvalidGPRReg;
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#if USE(JSVALUE32_64)
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m_stubInfo->patch.baseTagGPR = base.tagGPR();
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m_stubInfo->patch.valueTagGPR = value.tagGPR();
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m_stubInfo->patch.thisTagGPR = InvalidGPRReg;
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#endif
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}
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void JITByIdGenerator::finalize(LinkBuffer& fastPath, LinkBuffer& slowPath)
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{
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ASSERT(m_start.isSet());
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JITInlineCacheGenerator::finalize(
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fastPath, slowPath, fastPath.locationOf<JITStubRoutinePtrTag>(m_start));
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}
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void JITByIdGenerator::generateFastCommon(MacroAssembler& jit, size_t inlineICSize)
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{
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m_start = jit.label();
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size_t startSize = jit.m_assembler.buffer().codeSize();
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m_slowPathJump = jit.jump();
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size_t jumpSize = jit.m_assembler.buffer().codeSize() - startSize;
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size_t nopsToEmitInBytes = inlineICSize - jumpSize;
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jit.emitNops(nopsToEmitInBytes);
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ASSERT(jit.m_assembler.buffer().codeSize() - startSize == inlineICSize);
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m_done = jit.label();
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}
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JITGetByIdGenerator::JITGetByIdGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSite, const RegisterSet& usedRegisters,
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UniquedStringImpl* propertyName, JSValueRegs base, JSValueRegs value, AccessType accessType)
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: JITByIdGenerator(codeBlock, codeOrigin, callSite, accessType, usedRegisters, base, value)
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, m_isLengthAccess(propertyName == codeBlock->vm()->propertyNames->length.impl())
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{
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RELEASE_ASSERT(base.payloadGPR() != value.tagGPR());
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}
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void JITGetByIdGenerator::generateFastPath(MacroAssembler& jit)
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{
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generateFastCommon(jit, m_isLengthAccess ? InlineAccess::sizeForLengthAccess() : InlineAccess::sizeForPropertyAccess());
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}
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JITGetByIdWithThisGenerator::JITGetByIdWithThisGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSite, const RegisterSet& usedRegisters,
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UniquedStringImpl*, JSValueRegs value, JSValueRegs base, JSValueRegs thisRegs, AccessType accessType)
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: JITByIdGenerator(codeBlock, codeOrigin, callSite, accessType, usedRegisters, base, value)
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{
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RELEASE_ASSERT(thisRegs.payloadGPR() != thisRegs.tagGPR());
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m_stubInfo->patch.thisGPR = thisRegs.payloadGPR();
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#if USE(JSVALUE32_64)
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m_stubInfo->patch.thisTagGPR = thisRegs.tagGPR();
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#endif
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}
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void JITGetByIdWithThisGenerator::generateFastPath(MacroAssembler& jit)
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{
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generateFastCommon(jit, InlineAccess::sizeForPropertyAccess());
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}
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JITPutByIdGenerator::JITPutByIdGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSite, const RegisterSet& usedRegisters,
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JSValueRegs base, JSValueRegs value, GPRReg scratch,
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ECMAMode ecmaMode, PutKind putKind)
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: JITByIdGenerator(
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codeBlock, codeOrigin, callSite, AccessType::Put, usedRegisters, base, value)
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, m_ecmaMode(ecmaMode)
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, m_putKind(putKind)
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{
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m_stubInfo->patch.usedRegisters.clear(scratch);
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}
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void JITPutByIdGenerator::generateFastPath(MacroAssembler& jit)
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{
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generateFastCommon(jit, InlineAccess::sizeForPropertyReplace());
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}
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V_JITOperation_ESsiJJI JITPutByIdGenerator::slowPathFunction()
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{
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if (m_ecmaMode == StrictMode) {
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if (m_putKind == Direct)
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return operationPutByIdDirectStrictOptimize;
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return operationPutByIdStrictOptimize;
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}
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if (m_putKind == Direct)
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return operationPutByIdDirectNonStrictOptimize;
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return operationPutByIdNonStrictOptimize;
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}
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JITInByIdGenerator::JITInByIdGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSite, const RegisterSet& usedRegisters,
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UniquedStringImpl* propertyName, JSValueRegs base, JSValueRegs value)
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: JITByIdGenerator(codeBlock, codeOrigin, callSite, AccessType::In, usedRegisters, base, value)
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{
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// FIXME: We are not supporting fast path for "length" property.
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UNUSED_PARAM(propertyName);
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RELEASE_ASSERT(base.payloadGPR() != value.tagGPR());
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}
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void JITInByIdGenerator::generateFastPath(MacroAssembler& jit)
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{
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generateFastCommon(jit, InlineAccess::sizeForPropertyAccess());
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}
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JITInstanceOfGenerator::JITInstanceOfGenerator(
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CodeBlock* codeBlock, CodeOrigin codeOrigin, CallSiteIndex callSiteIndex,
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const RegisterSet& usedRegisters, GPRReg result, GPRReg value, GPRReg prototype,
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GPRReg scratch1, GPRReg scratch2, bool prototypeIsKnownObject)
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: JITInlineCacheGenerator(
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codeBlock, codeOrigin, callSiteIndex, AccessType::InstanceOf, usedRegisters)
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{
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m_stubInfo->patch.baseGPR = value;
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m_stubInfo->patch.valueGPR = result;
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m_stubInfo->patch.thisGPR = prototype;
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#if USE(JSVALUE32_64)
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m_stubInfo->patch.baseTagGPR = InvalidGPRReg;
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m_stubInfo->patch.valueTagGPR = InvalidGPRReg;
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m_stubInfo->patch.thisTagGPR = InvalidGPRReg;
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#endif
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m_stubInfo->patch.usedRegisters.clear(result);
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if (scratch1 != InvalidGPRReg)
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m_stubInfo->patch.usedRegisters.clear(scratch1);
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if (scratch2 != InvalidGPRReg)
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m_stubInfo->patch.usedRegisters.clear(scratch2);
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m_stubInfo->prototypeIsKnownObject = prototypeIsKnownObject;
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}
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void JITInstanceOfGenerator::generateFastPath(MacroAssembler& jit)
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{
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m_jump = jit.patchableJump();
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m_done = jit.label();
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}
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void JITInstanceOfGenerator::finalize(LinkBuffer& fastPath, LinkBuffer& slowPath)
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{
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JITInlineCacheGenerator::finalize(
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fastPath, slowPath,
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fastPath.locationOf<JITStubRoutinePtrTag>(m_jump));
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fastPath.link(m_jump.m_jump, slowPath.locationOf<NoPtrTag>(m_slowPathBegin));
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}
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} // namespace JSC
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#endif // ENABLE(JIT)
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