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258 lines (219 loc) · 8.87 KB
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/*
* Copyright (C) 2011, 2013, 2014 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 "AssemblyHelpers.h"
#if ENABLE(JIT)
#include "JITOperations.h"
#include "JSCInlines.h"
namespace JSC {
ExecutableBase* AssemblyHelpers::executableFor(const CodeOrigin& codeOrigin)
{
if (!codeOrigin.inlineCallFrame)
return m_codeBlock->ownerExecutable();
return codeOrigin.inlineCallFrame->executable.get();
}
Vector<BytecodeAndMachineOffset>& AssemblyHelpers::decodedCodeMapFor(CodeBlock* codeBlock)
{
ASSERT(codeBlock == codeBlock->baselineVersion());
ASSERT(codeBlock->jitType() == JITCode::BaselineJIT);
ASSERT(codeBlock->jitCodeMap());
HashMap<CodeBlock*, Vector<BytecodeAndMachineOffset>>::AddResult result = m_decodedCodeMaps.add(codeBlock, Vector<BytecodeAndMachineOffset>());
if (result.isNewEntry)
codeBlock->jitCodeMap()->decode(result.iterator->value);
return result.iterator->value;
}
void AssemblyHelpers::purifyNaN(FPRReg fpr)
{
MacroAssembler::Jump notNaN = branchDouble(DoubleEqual, fpr, fpr);
static const double NaN = PNaN;
loadDouble(TrustedImmPtr(&NaN), fpr);
notNaN.link(this);
}
#if ENABLE(SAMPLING_FLAGS)
void AssemblyHelpers::setSamplingFlag(int32_t flag)
{
ASSERT(flag >= 1);
ASSERT(flag <= 32);
or32(TrustedImm32(1u << (flag - 1)), AbsoluteAddress(SamplingFlags::addressOfFlags()));
}
void AssemblyHelpers::clearSamplingFlag(int32_t flag)
{
ASSERT(flag >= 1);
ASSERT(flag <= 32);
and32(TrustedImm32(~(1u << (flag - 1))), AbsoluteAddress(SamplingFlags::addressOfFlags()));
}
#endif
#if !ASSERT_DISABLED
#if USE(JSVALUE64)
void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
{
#if CPU(X86_64)
Jump checkInt32 = branch64(BelowOrEqual, gpr, TrustedImm64(static_cast<uintptr_t>(0xFFFFFFFFu)));
abortWithReason(AHIsNotInt32);
checkInt32.link(this);
#else
UNUSED_PARAM(gpr);
#endif
}
void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
{
Jump checkJSInt32 = branch64(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
abortWithReason(AHIsNotJSInt32);
checkJSInt32.link(this);
}
void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
{
Jump checkJSNumber = branchTest64(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
abortWithReason(AHIsNotJSNumber);
checkJSNumber.link(this);
}
void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
{
Jump checkJSInt32 = branch64(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
Jump checkJSNumber = branchTest64(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
checkJSInt32.link(this);
abortWithReason(AHIsNotJSDouble);
checkJSNumber.link(this);
}
void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
{
Jump checkCell = branchTest64(MacroAssembler::Zero, gpr, GPRInfo::tagMaskRegister);
abortWithReason(AHIsNotCell);
checkCell.link(this);
}
void AssemblyHelpers::jitAssertTagsInPlace()
{
Jump ok = branch64(Equal, GPRInfo::tagTypeNumberRegister, TrustedImm64(TagTypeNumber));
abortWithReason(AHTagTypeNumberNotInPlace);
breakpoint();
ok.link(this);
ok = branch64(Equal, GPRInfo::tagMaskRegister, TrustedImm64(TagMask));
abortWithReason(AHTagMaskNotInPlace);
ok.link(this);
}
#elif USE(JSVALUE32_64)
void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
{
UNUSED_PARAM(gpr);
}
void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
{
Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
abortWithReason(AHIsNotJSInt32);
checkJSInt32.link(this);
}
void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
{
Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
abortWithReason(AHIsNotJSNumber);
checkJSInt32.link(this);
checkJSDouble.link(this);
}
void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
{
Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
abortWithReason(AHIsNotJSDouble);
checkJSDouble.link(this);
}
void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
{
Jump checkCell = branch32(Equal, gpr, TrustedImm32(JSValue::CellTag));
abortWithReason(AHIsNotCell);
checkCell.link(this);
}
void AssemblyHelpers::jitAssertTagsInPlace()
{
}
#endif // USE(JSVALUE32_64)
void AssemblyHelpers::jitAssertHasValidCallFrame()
{
Jump checkCFR = branchTestPtr(Zero, GPRInfo::callFrameRegister, TrustedImm32(7));
abortWithReason(AHCallFrameMisaligned);
checkCFR.link(this);
}
void AssemblyHelpers::jitAssertIsNull(GPRReg gpr)
{
Jump checkNull = branchTestPtr(Zero, gpr);
abortWithReason(AHIsNotNull);
checkNull.link(this);
}
void AssemblyHelpers::jitAssertArgumentCountSane()
{
Jump ok = branch32(Below, payloadFor(JSStack::ArgumentCount), TrustedImm32(10000000));
abortWithReason(AHInsaneArgumentCount);
ok.link(this);
}
#endif // !ASSERT_DISABLED
void AssemblyHelpers::callExceptionFuzz()
{
if (!Options::enableExceptionFuzz())
return;
ASSERT(stackAlignmentBytes() >= sizeof(void*) * 2);
subPtr(TrustedImm32(stackAlignmentBytes()), stackPointerRegister);
poke(GPRInfo::returnValueGPR, 0);
poke(GPRInfo::returnValueGPR2, 1);
move(TrustedImmPtr(bitwise_cast<void*>(operationExceptionFuzz)), GPRInfo::nonPreservedNonReturnGPR);
call(GPRInfo::nonPreservedNonReturnGPR);
peek(GPRInfo::returnValueGPR, 0);
peek(GPRInfo::returnValueGPR2, 1);
addPtr(TrustedImm32(stackAlignmentBytes()), stackPointerRegister);
}
AssemblyHelpers::Jump AssemblyHelpers::emitExceptionCheck(ExceptionCheckKind kind)
{
callExceptionFuzz();
#if USE(JSVALUE64)
return branchTest64(kind == NormalExceptionCheck ? NonZero : Zero, AbsoluteAddress(vm()->addressOfException()));
#elif USE(JSVALUE32_64)
return branch32(kind == NormalExceptionCheck ? NotEqual : Equal, AbsoluteAddress(reinterpret_cast<char*>(vm()->addressOfException()) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
#endif
}
void AssemblyHelpers::emitStoreStructureWithTypeInfo(AssemblyHelpers& jit, TrustedImmPtr structure, RegisterID dest)
{
const Structure* structurePtr = static_cast<const Structure*>(structure.m_value);
#if USE(JSVALUE64)
jit.store64(TrustedImm64(structurePtr->idBlob()), MacroAssembler::Address(dest, JSCell::structureIDOffset()));
if (!ASSERT_DISABLED) {
Jump correctStructure = jit.branch32(Equal, MacroAssembler::Address(dest, JSCell::structureIDOffset()), TrustedImm32(structurePtr->id()));
jit.abortWithReason(AHStructureIDIsValid);
correctStructure.link(&jit);
Jump correctIndexingType = jit.branch8(Equal, MacroAssembler::Address(dest, JSCell::indexingTypeOffset()), TrustedImm32(structurePtr->indexingType()));
jit.abortWithReason(AHIndexingTypeIsValid);
correctIndexingType.link(&jit);
Jump correctType = jit.branch8(Equal, MacroAssembler::Address(dest, JSCell::typeInfoTypeOffset()), TrustedImm32(structurePtr->typeInfo().type()));
jit.abortWithReason(AHTypeInfoIsValid);
correctType.link(&jit);
Jump correctFlags = jit.branch8(Equal, MacroAssembler::Address(dest, JSCell::typeInfoFlagsOffset()), TrustedImm32(structurePtr->typeInfo().inlineTypeFlags()));
jit.abortWithReason(AHTypeInfoInlineTypeFlagsAreValid);
correctFlags.link(&jit);
}
#else
// Do a 32-bit wide store to initialize the cell's fields.
jit.store32(TrustedImm32(structurePtr->objectInitializationBlob()), MacroAssembler::Address(dest, JSCell::indexingTypeOffset()));
jit.storePtr(structure, MacroAssembler::Address(dest, JSCell::structureIDOffset()));
#endif
}
} // namespace JSC
#endif // ENABLE(JIT)