*/
#include "config.h"
-#include "JIT.h"
#if ENABLE(JIT)
+#include "JIT.h"
-#include "CodeBlock.h"
-#include "JITInlineMethods.h"
-#include "JITStubCall.h"
-#include "JSArray.h"
-#include "JSFunction.h"
-#include "JSPropertyNameIterator.h"
-#include "Interpreter.h"
-#include "LinkBuffer.h"
-#include "RepatchBuffer.h"
-#include "ResultType.h"
-#include "SamplingTool.h"
-
-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-
-using namespace std;
-
-namespace JSC {
-
-#if USE(JSVALUE32_64)
-
-void JIT::emit_op_put_by_index(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_by_index);
- stubCall.addArgument(base);
- stubCall.addArgument(Imm32(property));
- stubCall.addArgument(value);
- stubCall.call();
-}
-
-void JIT::emit_op_put_getter(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned function = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_getter);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
- stubCall.addArgument(function);
- stubCall.call();
-}
-
-void JIT::emit_op_put_setter(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned function = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_setter);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
- stubCall.addArgument(function);
- stubCall.call();
-}
-
-void JIT::emit_op_del_by_id(Instruction* currentInstruction)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_del_by_id);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
- stubCall.call(dst);
-}
-
-
-#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair.
-void JIT::emit_op_method_check(Instruction*) {}
-void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
-#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-#error "JIT_OPTIMIZE_METHOD_CALLS requires JIT_OPTIMIZE_PROPERTY_ACCESS"
-#endif
-
-void JIT::emit_op_get_by_val(Instruction* currentInstruction)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_get_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.call(dst);
-}
-
-void JIT::emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- ASSERT_NOT_REACHED();
-}
-
-void JIT::emit_op_put_by_val(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.addArgument(value);
- stubCall.call();
-}
-
-void JIT::emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- ASSERT_NOT_REACHED();
-}
-
-void JIT::emit_op_get_by_id(Instruction* currentInstruction)
-{
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
- int ident = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_get_by_id_generic);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
- stubCall.call(dst);
-
- m_propertyAccessInstructionIndex++;
-}
-
-void JIT::emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- m_propertyAccessInstructionIndex++;
- ASSERT_NOT_REACHED();
-}
-
-void JIT::emit_op_put_by_id(Instruction* currentInstruction)
-{
- int base = currentInstruction[1].u.operand;
- int ident = currentInstruction[2].u.operand;
- int value = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_put_by_id_generic);
- stubCall.addArgument(base);
- stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
- stubCall.addArgument(value);
- stubCall.call();
-
- m_propertyAccessInstructionIndex++;
-}
-
-void JIT::emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- m_propertyAccessInstructionIndex++;
- ASSERT_NOT_REACHED();
-}
-
-#else // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-
-void JIT::emit_op_method_check(Instruction* currentInstruction)
-{
- // Assert that the following instruction is a get_by_id.
- ASSERT(m_interpreter->getOpcodeID((currentInstruction + OPCODE_LENGTH(op_method_check))->u.opcode) == op_get_by_id);
-
- currentInstruction += OPCODE_LENGTH(op_method_check);
-
- // Do the method check - check the object & its prototype's structure inline (this is the common case).
- m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_propertyAccessInstructionIndex));
- MethodCallCompilationInfo& info = m_methodCallCompilationInfo.last();
-
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
-
- emitLoad(base, regT1, regT0);
- emitJumpSlowCaseIfNotJSCell(base, regT1);
-
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
-
- Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), info.structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
- DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(ImmPtr(0), regT2);
- Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), protoStructureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
-
- // This will be relinked to load the function without doing a load.
- DataLabelPtr putFunction = moveWithPatch(ImmPtr(0), regT0);
-
- END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
-
- move(Imm32(JSValue::CellTag), regT1);
- Jump match = jump();
-
- ASSERT(differenceBetween(info.structureToCompare, protoObj) == patchOffsetMethodCheckProtoObj);
- ASSERT(differenceBetween(info.structureToCompare, protoStructureToCompare) == patchOffsetMethodCheckProtoStruct);
- ASSERT(differenceBetween(info.structureToCompare, putFunction) == patchOffsetMethodCheckPutFunction);
-
- // Link the failure cases here.
- structureCheck.link(this);
- protoStructureCheck.link(this);
-
- // Do a regular(ish) get_by_id (the slow case will be link to
- // cti_op_get_by_id_method_check instead of cti_op_get_by_id.
- compileGetByIdHotPath();
-
- match.link(this);
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_method_check), dst, regT1, regT0);
-
- // We've already generated the following get_by_id, so make sure it's skipped over.
- m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
-}
-
-void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- currentInstruction += OPCODE_LENGTH(op_method_check);
-
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
- int ident = currentInstruction[3].u.operand;
-
- compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter, true);
-
- // We've already generated the following get_by_id, so make sure it's skipped over.
- m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
-}
-
-#else //!ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-
-// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair.
-void JIT::emit_op_method_check(Instruction*) {}
-void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
-
-#endif
-
-void JIT::emit_op_get_by_val(Instruction* currentInstruction)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
-
- emitLoad2(base, regT1, regT0, property, regT3, regT2);
-
- addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
- emitJumpSlowCaseIfNotJSCell(base, regT1);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
-
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT3);
- addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
-
- load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4), regT1); // tag
- load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0); // payload
- addSlowCase(branch32(Equal, regT1, Imm32(JSValue::EmptyValueTag)));
-
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_val), dst, regT1, regT0);
-}
-
-void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
-
- linkSlowCase(iter); // property int32 check
- linkSlowCaseIfNotJSCell(iter, base); // base cell check
- linkSlowCase(iter); // base array check
- linkSlowCase(iter); // vector length check
- linkSlowCase(iter); // empty value
-
- JITStubCall stubCall(this, cti_op_get_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.call(dst);
-}
-
-void JIT::emit_op_put_by_val(Instruction* currentInstruction)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
-
- emitLoad2(base, regT1, regT0, property, regT3, regT2);
-
- addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
- emitJumpSlowCaseIfNotJSCell(base, regT1);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
- addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
-
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT3);
-
- Jump empty = branch32(Equal, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4), Imm32(JSValue::EmptyValueTag));
-
- Label storeResult(this);
- emitLoad(value, regT1, regT0);
- store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); // payload
- store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4)); // tag
- Jump end = jump();
-
- empty.link(this);
- add32(Imm32(1), Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
- branch32(Below, regT2, Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length))).linkTo(storeResult, this);
-
- add32(Imm32(1), regT2, regT0);
- store32(regT0, Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length)));
- jump().linkTo(storeResult, this);
-
- end.link(this);
-}
-
-void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- unsigned base = currentInstruction[1].u.operand;
- unsigned property = currentInstruction[2].u.operand;
- unsigned value = currentInstruction[3].u.operand;
-
- linkSlowCase(iter); // property int32 check
- linkSlowCaseIfNotJSCell(iter, base); // base cell check
- linkSlowCase(iter); // base not array check
- linkSlowCase(iter); // in vector check
-
- JITStubCall stubPutByValCall(this, cti_op_put_by_val);
- stubPutByValCall.addArgument(base);
- stubPutByValCall.addArgument(property);
- stubPutByValCall.addArgument(value);
- stubPutByValCall.call();
-}
-
-void JIT::emit_op_get_by_id(Instruction* currentInstruction)
-{
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
-
- emitLoad(base, regT1, regT0);
- emitJumpSlowCaseIfNotJSCell(base, regT1);
- compileGetByIdHotPath();
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_id), dst, regT1, regT0);
-}
-
-void JIT::compileGetByIdHotPath()
-{
- // As for put_by_id, get_by_id requires the offset of the Structure and the offset of the access to be patched.
- // Additionally, for get_by_id we need patch the offset of the branch to the slow case (we patch this to jump
- // to array-length / prototype access tranpolines, and finally we also the the property-map access offset as a label
- // to jump back to if one of these trampolies finds a match.
-
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
-
- Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
- m_propertyAccessInstructionIndex++;
-
- DataLabelPtr structureToCompare;
- Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
- addSlowCase(structureCheck);
- ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetGetByIdStructure);
- ASSERT(differenceBetween(hotPathBegin, structureCheck) == patchOffsetGetByIdBranchToSlowCase);
-
- Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT2);
- Label externalLoadComplete(this);
- ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetGetByIdExternalLoad);
- ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthGetByIdExternalLoad);
-
- DataLabel32 displacementLabel1 = loadPtrWithAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT0); // payload
- ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetGetByIdPropertyMapOffset1);
- DataLabel32 displacementLabel2 = loadPtrWithAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT1); // tag
- ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetGetByIdPropertyMapOffset2);
-
- Label putResult(this);
- ASSERT(differenceBetween(hotPathBegin, putResult) == patchOffsetGetByIdPutResult);
-
- END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
-}
-
-void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- int dst = currentInstruction[1].u.operand;
- int base = currentInstruction[2].u.operand;
- int ident = currentInstruction[3].u.operand;
-
- compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter);
-}
-
-void JIT::compileGetByIdSlowCase(int dst, int base, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck)
-{
- // As for the hot path of get_by_id, above, we ensure that we can use an architecture specific offset
- // so that we only need track one pointer into the slow case code - we track a pointer to the location
- // of the call (which we can use to look up the patch information), but should a array-length or
- // prototype access trampoline fail we want to bail out back to here. To do so we can subtract back
- // the distance from the call to the head of the slow case.
- linkSlowCaseIfNotJSCell(iter, base);
- linkSlowCase(iter);
-
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
-
-#ifndef NDEBUG
- Label coldPathBegin(this);
-#endif
- JITStubCall stubCall(this, isMethodCheck ? cti_op_get_by_id_method_check : cti_op_get_by_id);
- stubCall.addArgument(regT1, regT0);
- stubCall.addArgument(ImmPtr(ident));
- Call call = stubCall.call(dst);
-
- END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
-
- ASSERT(differenceBetween(coldPathBegin, call) == patchOffsetGetByIdSlowCaseCall);
-
- // Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
- m_propertyAccessInstructionIndex++;
-}
-
-void JIT::emit_op_put_by_id(Instruction* currentInstruction)
-{
- // In order to be able to patch both the Structure, and the object offset, we store one pointer,
- // to just after the arguments have been loaded into registers 'hotPathBegin', and we generate code
- // such that the Structure & offset are always at the same distance from this.
-
- int base = currentInstruction[1].u.operand;
- int value = currentInstruction[3].u.operand;
-
- emitLoad2(base, regT1, regT0, value, regT3, regT2);
-
- emitJumpSlowCaseIfNotJSCell(base, regT1);
-
- BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
-
- Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
- m_propertyAccessInstructionIndex++;
-
- // It is important that the following instruction plants a 32bit immediate, in order that it can be patched over.
- DataLabelPtr structureToCompare;
- addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
- ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetPutByIdStructure);
-
- // Plant a load from a bogus ofset in the object's property map; we will patch this later, if it is to be used.
- Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
- Label externalLoadComplete(this);
- ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetPutByIdExternalLoad);
- ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthPutByIdExternalLoad);
-
- DataLabel32 displacementLabel1 = storePtrWithAddressOffsetPatch(regT2, Address(regT0, patchGetByIdDefaultOffset)); // payload
- DataLabel32 displacementLabel2 = storePtrWithAddressOffsetPatch(regT3, Address(regT0, patchGetByIdDefaultOffset)); // tag
-
- END_UNINTERRUPTED_SEQUENCE(sequencePutById);
-
- ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetPutByIdPropertyMapOffset1);
- ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetPutByIdPropertyMapOffset2);
-}
-
-void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- int base = currentInstruction[1].u.operand;
- int ident = currentInstruction[2].u.operand;
-
- linkSlowCaseIfNotJSCell(iter, base);
- linkSlowCase(iter);
-
- JITStubCall stubCall(this, cti_op_put_by_id);
- stubCall.addArgument(regT1, regT0);
- stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
- stubCall.addArgument(regT3, regT2);
- Call call = stubCall.call();
-
- // Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
- m_propertyAccessInstructionIndex++;
-}
-
-// Compile a store into an object's property storage. May overwrite base.
-void JIT::compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, Structure* structure, size_t cachedOffset)
-{
- int offset = cachedOffset;
- if (structure->isUsingInlineStorage())
- offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage) / sizeof(Register);
- else
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- emitStore(offset, valueTag, valuePayload, base);
-}
-
-// Compile a load from an object's property storage. May overwrite base.
-void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, Structure* structure, size_t cachedOffset)
-{
- int offset = cachedOffset;
- if (structure->isUsingInlineStorage())
- offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage) / sizeof(Register);
- else
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- emitLoad(offset, resultTag, resultPayload, base);
-}
-
-void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset)
-{
- if (base->isUsingInlineStorage()) {
- load32(reinterpret_cast<char*>(&base->m_inlineStorage[cachedOffset]), resultPayload);
- load32(reinterpret_cast<char*>(&base->m_inlineStorage[cachedOffset]) + 4, resultTag);
- return;
- }
-
- size_t offset = cachedOffset * sizeof(JSValue);
-
- PropertyStorage* protoPropertyStorage = &base->m_externalStorage;
- loadPtr(static_cast<void*>(protoPropertyStorage), temp);
- load32(Address(temp, offset), resultPayload);
- load32(Address(temp, offset + 4), resultTag);
-}
-
-void JIT::testPrototype(Structure* structure, JumpList& failureCases)
-{
- if (structure->m_prototype.isNull())
- return;
-
- failureCases.append(branchPtr(NotEqual, AbsoluteAddress(&asCell(structure->m_prototype)->m_structure), ImmPtr(asCell(structure->m_prototype)->m_structure)));
-}
-
-void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress)
-{
- // It is assumed that regT0 contains the basePayload and regT1 contains the baseTag. The value can be found on the stack.
-
- JumpList failureCases;
- failureCases.append(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
- failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
- testPrototype(oldStructure, failureCases);
-
- // Verify that nothing in the prototype chain has a setter for this property.
- for (RefPtr<Structure>* it = chain->head(); *it; ++it)
- testPrototype(it->get(), failureCases);
-
- // Reallocate property storage if needed.
- Call callTarget;
- bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
- if (willNeedStorageRealloc) {
- // This trampoline was called to like a JIT stub; before we can can call again we need to
- // remove the return address from the stack, to prevent the stack from becoming misaligned.
- preserveReturnAddressAfterCall(regT3);
-
- JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc);
- stubCall.skipArgument(); // base
- stubCall.skipArgument(); // ident
- stubCall.skipArgument(); // value
- stubCall.addArgument(Imm32(oldStructure->propertyStorageCapacity()));
- stubCall.addArgument(Imm32(newStructure->propertyStorageCapacity()));
- stubCall.call(regT0);
-
- restoreReturnAddressBeforeReturn(regT3);
- }
-
- sub32(Imm32(1), AbsoluteAddress(oldStructure->addressOfCount()));
- add32(Imm32(1), AbsoluteAddress(newStructure->addressOfCount()));
- storePtr(ImmPtr(newStructure), Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)));
-
- load32(Address(stackPointerRegister, offsetof(struct JITStackFrame, args[2]) + sizeof(void*)), regT3);
- load32(Address(stackPointerRegister, offsetof(struct JITStackFrame, args[2]) + sizeof(void*) + 4), regT2);
-
- // Write the value
- compilePutDirectOffset(regT0, regT2, regT3, newStructure, cachedOffset);
-
- ret();
-
- ASSERT(!failureCases.empty());
- failureCases.link(this);
- restoreArgumentReferenceForTrampoline();
- Call failureCall = tailRecursiveCall();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- patchBuffer.link(failureCall, FunctionPtr(cti_op_put_by_id_fail));
-
- if (willNeedStorageRealloc) {
- ASSERT(m_calls.size() == 1);
- patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc));
- }
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relinkCallerToTrampoline(returnAddress, entryLabel);
-}
-
-void JIT::patchGetByIdSelf(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
-{
- RepatchBuffer repatchBuffer(codeBlock);
-
- // We don't want to patch more than once - in future go to cti_op_get_by_id_generic.
- // Should probably go to JITStubs::cti_op_get_by_id_fail, but that doesn't do anything interesting right now.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail));
-
- int offset = sizeof(JSValue) * cachedOffset;
-
- // If we're patching to use inline storage, convert the initial load to a lea; this avoids the extra load
- // and makes the subsequent load's offset automatically correct
- if (structure->isUsingInlineStorage())
- repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetGetByIdExternalLoad));
-
- // Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetGetByIdStructure), structure);
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset1), offset); // payload
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset2), offset + 4); // tag
-}
-
-void JIT::patchMethodCallProto(CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, JSFunction* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
-{
- RepatchBuffer repatchBuffer(codeBlock);
-
- ASSERT(!methodCallLinkInfo.cachedStructure);
- methodCallLinkInfo.cachedStructure = structure;
- structure->ref();
-
- Structure* prototypeStructure = proto->structure();
- ASSERT(!methodCallLinkInfo.cachedPrototypeStructure);
- methodCallLinkInfo.cachedPrototypeStructure = prototypeStructure;
- prototypeStructure->ref();
-
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel, structure);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoObj), proto);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoStruct), prototypeStructure);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckPutFunction), callee);
-
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id));
-}
-
-void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
-{
- RepatchBuffer repatchBuffer(codeBlock);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- // Should probably go to cti_op_put_by_id_fail, but that doesn't do anything interesting right now.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_put_by_id_generic));
-
- int offset = sizeof(JSValue) * cachedOffset;
-
- // If we're patching to use inline storage, convert the initial load to a lea; this avoids the extra load
- // and makes the subsequent load's offset automatically correct
- if (structure->isUsingInlineStorage())
- repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetPutByIdExternalLoad));
-
- // Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetPutByIdStructure), structure);
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset1), offset); // payload
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset2), offset + 4); // tag
-}
-
-void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
-{
- StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
-
- // regT0 holds a JSCell*
-
- // Check for array
- Jump failureCases1 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr));
-
- // Checks out okay! - get the length from the storage
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
- load32(Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
-
- Jump failureCases2 = branch32(Above, regT2, Imm32(INT_MAX));
- move(regT2, regT0);
- move(Imm32(JSValue::Int32Tag), regT1);
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
- patchBuffer.link(failureCases1, slowCaseBegin);
- patchBuffer.link(failureCases2, slowCaseBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- // Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail));
-}
-
-void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
-{
- // regT0 holds a JSCell*
-
- // The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is
- // referencing the prototype object - let's speculatively load it's table nice and early!)
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
-
- Jump failureCases1 = checkStructure(regT0, structure);
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(prototypeStructure), regT3);
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
-#else
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
-
- // Checks out okay! - getDirectOffset
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
-
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
- patchBuffer.link(failureCases1, slowCaseBegin);
- patchBuffer.link(failureCases2, slowCaseBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- // Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
-}
-
-
-void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, size_t cachedOffset)
-{
- // regT0 holds a JSCell*
-
- Jump failureCase = checkStructure(regT0, structure);
- compileGetDirectOffset(regT0, regT1, regT0, structure, cachedOffset);
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine;
- if (!lastProtoBegin)
- lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
-
- patchBuffer.link(failureCase, lastProtoBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- structure->ref();
- polymorphicStructures->list[currentIndex].set(entryLabel, structure);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-}
-
-void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, CallFrame* callFrame)
-{
- // regT0 holds a JSCell*
-
- // The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is
- // referencing the prototype object - let's speculatively load it's table nice and early!)
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
-
- // Check eax is an object of the right Structure.
- Jump failureCases1 = checkStructure(regT0, structure);
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(prototypeStructure), regT3);
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
-#else
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
-
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
-
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
- patchBuffer.link(failureCases1, lastProtoBegin);
- patchBuffer.link(failureCases2, lastProtoBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- structure->ref();
- prototypeStructure->ref();
- prototypeStructures->list[currentIndex].set(entryLabel, structure, prototypeStructure);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-}
-
-void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, CallFrame* callFrame)
-{
- // regT0 holds a JSCell*
-
- ASSERT(count);
-
- JumpList bucketsOfFail;
-
- // Check eax is an object of the right Structure.
- bucketsOfFail.append(checkStructure(regT0, structure));
-
- Structure* currStructure = structure;
- RefPtr<Structure>* chainEntries = chain->head();
- JSObject* protoObject = 0;
- for (unsigned i = 0; i < count; ++i) {
- protoObject = asObject(currStructure->prototypeForLookup(callFrame));
- currStructure = chainEntries[i].get();
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(currStructure), regT3);
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
-#else
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
-#endif
- }
- ASSERT(protoObject);
-
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
-
- patchBuffer.link(bucketsOfFail, lastProtoBegin);
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- // Track the stub we have created so that it will be deleted later.
- structure->ref();
- chain->ref();
- prototypeStructures->list[currentIndex].set(entryLabel, structure, chain);
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-}
-
-void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
-{
- // regT0 holds a JSCell*
-
- ASSERT(count);
-
- JumpList bucketsOfFail;
-
- // Check eax is an object of the right Structure.
- bucketsOfFail.append(checkStructure(regT0, structure));
-
- Structure* currStructure = structure;
- RefPtr<Structure>* chainEntries = chain->head();
- JSObject* protoObject = 0;
- for (unsigned i = 0; i < count; ++i) {
- protoObject = asObject(currStructure->prototypeForLookup(callFrame));
- currStructure = chainEntries[i].get();
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(currStructure), regT3);
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
-#else
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
-#endif
- }
- ASSERT(protoObject);
-
- compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
- Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
-
- // Use the patch information to link the failure cases back to the original slow case routine.
- patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall));
-
- // On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
-
- // Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
-
- // Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
- RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
-
- // We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
-}
+#include "CodeBlock.h"
+#include "GetterSetter.h"
+#include "JITInlineMethods.h"
+#include "JITStubCall.h"
+#include "JSArray.h"
+#include "JSFunction.h"
+#include "JSPropertyNameIterator.h"
+#include "Interpreter.h"
+#include "LinkBuffer.h"
+#include "RepatchBuffer.h"
+#include "ResultType.h"
+#include "SamplingTool.h"
-/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
-#endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
+using namespace std;
-void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID structure, RegisterID offset)
-{
- ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
- ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
- ASSERT(sizeof(JSValue) == 8);
-
- Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
- Jump finishedLoad = jump();
- notUsingInlineStorage.link(this);
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
- loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
- finishedLoad.link(this);
-}
+namespace JSC {
+#if USE(JSVALUE64)
-void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
+JIT::CodeRef JIT::stringGetByValStubGenerator(JSGlobalData* globalData)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
- unsigned expected = currentInstruction[4].u.operand;
- unsigned iter = currentInstruction[5].u.operand;
- unsigned i = currentInstruction[6].u.operand;
-
- emitLoad2(property, regT1, regT0, base, regT3, regT2);
- emitJumpSlowCaseIfNotJSCell(property, regT1);
- addSlowCase(branchPtr(NotEqual, regT0, payloadFor(expected)));
- // Property registers are now available as the property is known
- emitJumpSlowCaseIfNotJSCell(base, regT3);
- emitLoadPayload(iter, regT1);
-
- // Test base's structure
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
- addSlowCase(branchPtr(NotEqual, regT0, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
- load32(addressFor(i), regT3);
- sub32(Imm32(1), regT3);
- addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
- compileGetDirectOffset(regT2, regT1, regT0, regT0, regT3);
+ JSInterfaceJIT jit;
+ JumpList failures;
+ failures.append(jit.branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_pname), dst, regT1, regT0);
-}
+ // Load string length to regT2, and start the process of loading the data pointer into regT0
+ jit.load32(Address(regT0, ThunkHelpers::jsStringLengthOffset()), regT2);
+ jit.loadPtr(Address(regT0, ThunkHelpers::jsStringValueOffset()), regT0);
+ failures.append(jit.branchTest32(Zero, regT0));
-void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned base = currentInstruction[2].u.operand;
- unsigned property = currentInstruction[3].u.operand;
+ // Do an unsigned compare to simultaneously filter negative indices as well as indices that are too large
+ failures.append(jit.branch32(AboveOrEqual, regT1, regT2));
- linkSlowCaseIfNotJSCell(iter, property);
- linkSlowCase(iter);
- linkSlowCaseIfNotJSCell(iter, base);
- linkSlowCase(iter);
- linkSlowCase(iter);
+ // Load the character
+ JumpList is16Bit;
+ JumpList cont8Bit;
+ // Load the string flags
+ jit.loadPtr(Address(regT0, ThunkHelpers::stringImplFlagsOffset()), regT2);
+ jit.loadPtr(Address(regT0, ThunkHelpers::stringImplDataOffset()), regT0);
+ is16Bit.append(jit.branchTest32(Zero, regT2, TrustedImm32(ThunkHelpers::stringImpl8BitFlag())));
+ jit.load8(BaseIndex(regT0, regT1, TimesOne, 0), regT0);
+ cont8Bit.append(jit.jump());
+ is16Bit.link(&jit);
+ jit.load16(BaseIndex(regT0, regT1, TimesTwo, 0), regT0);
+ cont8Bit.link(&jit);
+
+ failures.append(jit.branch32(AboveOrEqual, regT0, TrustedImm32(0x100)));
+ jit.move(TrustedImmPtr(globalData->smallStrings.singleCharacterStrings()), regT1);
+ jit.loadPtr(BaseIndex(regT1, regT0, ScalePtr, 0), regT0);
+ jit.ret();
- JITStubCall stubCall(this, cti_op_get_by_val);
- stubCall.addArgument(base);
- stubCall.addArgument(property);
- stubCall.call(dst);
+ failures.link(&jit);
+ jit.move(TrustedImm32(0), regT0);
+ jit.ret();
+
+ LinkBuffer patchBuffer(*globalData, &jit, GLOBAL_THUNK_ID);
+ return patchBuffer.finalizeCode();
}
-#else // USE(JSVALUE32_64)
-
void JIT::emit_op_get_by_val(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
emitGetVirtualRegisters(base, regT0, property, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
+
// This is technically incorrect - we're zero-extending an int32. On the hot path this doesn't matter.
// We check the value as if it was a uint32 against the m_vectorLength - which will always fail if
// number was signed since m_vectorLength is always less than intmax (since the total allocation
// to 64-bits is necessary since it's used in the address calculation. We zero extend rather than sign
// extending since it makes it easier to re-tag the value in the slow case.
zeroExtend32ToPtr(regT1, regT1);
-#else
- emitFastArithImmToInt(regT1);
-#endif
+
emitJumpSlowCaseIfNotJSCell(regT0, base);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
+ addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSArray::s_info)));
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
- addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
+ loadPtr(Address(regT0, JSArray::storageOffset()), regT2);
+ addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, JSArray::vectorLengthOffset())));
loadPtr(BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0);
addSlowCase(branchTestPtr(Zero, regT0));
+ emitValueProfilingSite();
emitPutVirtualRegister(dst);
}
-void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID structure, RegisterID offset, RegisterID scratch)
+void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ unsigned dst = currentInstruction[1].u.operand;
+ unsigned base = currentInstruction[2].u.operand;
+ unsigned property = currentInstruction[3].u.operand;
+
+ linkSlowCase(iter); // property int32 check
+ linkSlowCaseIfNotJSCell(iter, base); // base cell check
+ Jump nonCell = jump();
+ linkSlowCase(iter); // base array check
+ Jump notString = branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info));
+ emitNakedCall(CodeLocationLabel(m_globalData->getCTIStub(stringGetByValStubGenerator).code()));
+ Jump failed = branchTestPtr(Zero, regT0);
+ emitPutVirtualRegister(dst, regT0);
+ emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_get_by_val));
+ failed.link(this);
+ notString.link(this);
+ nonCell.link(this);
+
+ linkSlowCase(iter); // vector length check
+ linkSlowCase(iter); // empty value
+
+ JITStubCall stubCall(this, cti_op_get_by_val);
+ stubCall.addArgument(base, regT2);
+ stubCall.addArgument(property, regT2);
+ stubCall.call(dst);
+
+ emitValueProfilingSite();
+}
+
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch)
{
- ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
- ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
-
- Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
- loadPtr(BaseIndex(base, offset, ScalePtr, OBJECT_OFFSETOF(JSObject, m_inlineStorage)), result);
- Jump finishedLoad = jump();
- notUsingInlineStorage.link(this);
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), scratch);
+ loadPtr(Address(base, JSObject::offsetOfPropertyStorage()), scratch);
loadPtr(BaseIndex(scratch, offset, ScalePtr, 0), result);
- finishedLoad.link(this);
}
void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
emitJumpSlowCaseIfNotJSCell(regT0, base);
// Test base's structure
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+ loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
addSlowCase(branchPtr(NotEqual, regT2, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
load32(addressFor(i), regT3);
- sub32(Imm32(1), regT3);
+ sub32(TrustedImm32(1), regT3);
addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
- compileGetDirectOffset(regT0, regT0, regT2, regT3, regT1);
+ compileGetDirectOffset(regT0, regT0, regT3, regT1);
emitPutVirtualRegister(dst, regT0);
}
emitGetVirtualRegisters(base, regT0, property, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
// See comment in op_get_by_val.
zeroExtend32ToPtr(regT1, regT1);
-#else
- emitFastArithImmToInt(regT1);
-#endif
emitJumpSlowCaseIfNotJSCell(regT0, base);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
- addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
-
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
+ addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSArray::s_info)));
+ addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, JSArray::vectorLengthOffset())));
+ loadPtr(Address(regT0, JSArray::storageOffset()), regT2);
Jump empty = branchTestPtr(Zero, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
Label storeResult(this);
- emitGetVirtualRegister(value, regT0);
- storePtr(regT0, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
+ emitGetVirtualRegister(value, regT3);
+ storePtr(regT3, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
Jump end = jump();
empty.link(this);
- add32(Imm32(1), Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
+ add32(TrustedImm32(1), Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
branch32(Below, regT1, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length))).linkTo(storeResult, this);
- move(regT1, regT0);
- add32(Imm32(1), regT0);
- store32(regT0, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)));
+ add32(TrustedImm32(1), regT1);
+ store32(regT1, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)));
+ sub32(TrustedImm32(1), regT1);
jump().linkTo(storeResult, this);
end.link(this);
+
+ emitWriteBarrier(regT0, regT3, regT1, regT3, ShouldFilterImmediates, WriteBarrierForPropertyAccess);
}
-void JIT::emit_op_put_by_index(Instruction* currentInstruction)
+void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- JITStubCall stubCall(this, cti_op_put_by_index);
- stubCall.addArgument(currentInstruction[1].u.operand, regT2);
- stubCall.addArgument(Imm32(currentInstruction[2].u.operand));
- stubCall.addArgument(currentInstruction[3].u.operand, regT2);
- stubCall.call();
+ unsigned base = currentInstruction[1].u.operand;
+ unsigned property = currentInstruction[2].u.operand;
+ unsigned value = currentInstruction[3].u.operand;
+
+ linkSlowCase(iter); // property int32 check
+ linkSlowCaseIfNotJSCell(iter, base); // base cell check
+ linkSlowCase(iter); // base not array check
+ linkSlowCase(iter); // in vector check
+
+ JITStubCall stubPutByValCall(this, cti_op_put_by_val);
+ stubPutByValCall.addArgument(regT0);
+ stubPutByValCall.addArgument(property, regT2);
+ stubPutByValCall.addArgument(value, regT2);
+ stubPutByValCall.call();
}
-void JIT::emit_op_put_getter(Instruction* currentInstruction)
+void JIT::emit_op_put_by_index(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_put_getter);
+ JITStubCall stubCall(this, cti_op_put_by_index);
stubCall.addArgument(currentInstruction[1].u.operand, regT2);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
+ stubCall.addArgument(TrustedImm32(currentInstruction[2].u.operand));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
stubCall.call();
}
-void JIT::emit_op_put_setter(Instruction* currentInstruction)
+void JIT::emit_op_put_getter_setter(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_put_setter);
+ JITStubCall stubCall(this, cti_op_put_getter_setter);
stubCall.addArgument(currentInstruction[1].u.operand, regT2);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
+ stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
+ stubCall.addArgument(currentInstruction[4].u.operand, regT2);
stubCall.call();
}
{
JITStubCall stubCall(this, cti_op_del_by_id);
stubCall.addArgument(currentInstruction[2].u.operand, regT2);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
+ stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
stubCall.call(currentInstruction[1].u.operand);
}
-
-#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair.
-void JIT::emit_op_method_check(Instruction*) {}
-void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
-#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-#error "JIT_OPTIMIZE_METHOD_CALLS requires JIT_OPTIMIZE_PROPERTY_ACCESS"
-#endif
-
-void JIT::emit_op_get_by_id(Instruction* currentInstruction)
-{
- unsigned resultVReg = currentInstruction[1].u.operand;
- unsigned baseVReg = currentInstruction[2].u.operand;
- Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
-
- emitGetVirtualRegister(baseVReg, regT0);
- JITStubCall stubCall(this, cti_op_get_by_id_generic);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(ident));
- stubCall.call(resultVReg);
-
- m_propertyAccessInstructionIndex++;
-}
-
-void JIT::emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- ASSERT_NOT_REACHED();
-}
-
-void JIT::emit_op_put_by_id(Instruction* currentInstruction)
-{
- unsigned baseVReg = currentInstruction[1].u.operand;
- Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand));
- unsigned valueVReg = currentInstruction[3].u.operand;
-
- emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1);
-
- JITStubCall stubCall(this, cti_op_put_by_id_generic);
- stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(ident));
- stubCall.addArgument(regT1);
- stubCall.call();
-
- m_propertyAccessInstructionIndex++;
-}
-
-void JIT::emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
-{
- ASSERT_NOT_REACHED();
-}
-
-#else // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-
-/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
-
-#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-
void JIT::emit_op_method_check(Instruction* currentInstruction)
{
// Assert that the following instruction is a get_by_id.
emitGetVirtualRegister(baseVReg, regT0);
// Do the method check - check the object & its prototype's structure inline (this is the common case).
- m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_propertyAccessInstructionIndex));
+ m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_bytecodeOffset, m_propertyAccessCompilationInfo.size()));
MethodCallCompilationInfo& info = m_methodCallCompilationInfo.last();
Jump notCell = emitJumpIfNotJSCell(regT0);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
- Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), info.structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
- DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(ImmPtr(0), regT1);
- Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT1, OBJECT_OFFSETOF(JSCell, m_structure)), protoStructureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
+ Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), info.structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
+ DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(TrustedImmPtr(0), regT1);
+ Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT1, JSCell::structureOffset()), protoStructureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
// This will be relinked to load the function without doing a load.
- DataLabelPtr putFunction = moveWithPatch(ImmPtr(0), regT0);
+ DataLabelPtr putFunction = moveWithPatch(TrustedImmPtr(0), regT0);
END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
Jump match = jump();
- ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoObj), patchOffsetMethodCheckProtoObj);
- ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoStructureToCompare), patchOffsetMethodCheckProtoStruct);
- ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, putFunction), patchOffsetMethodCheckPutFunction);
-
// Link the failure cases here.
notCell.link(this);
structureCheck.link(this);
// Do a regular(ish) get_by_id (the slow case will be link to
// cti_op_get_by_id_method_check instead of cti_op_get_by_id.
- compileGetByIdHotPath(resultVReg, baseVReg, ident, m_propertyAccessInstructionIndex++);
+ compileGetByIdHotPath(baseVReg, ident);
match.link(this);
+ emitValueProfilingSite(m_bytecodeOffset + OPCODE_LENGTH(op_method_check));
emitPutVirtualRegister(resultVReg);
// We've already generated the following get_by_id, so make sure it's skipped over.
- m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
+ m_bytecodeOffset += OPCODE_LENGTH(op_get_by_id);
+
+ m_propertyAccessCompilationInfo.last().addMethodCheckInfo(info.structureToCompare, protoObj, protoStructureToCompare, putFunction);
}
void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
compileGetByIdSlowCase(resultVReg, baseVReg, ident, iter, true);
+ emitValueProfilingSite(m_bytecodeOffset + OPCODE_LENGTH(op_method_check));
// We've already generated the following get_by_id, so make sure it's skipped over.
- m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
+ m_bytecodeOffset += OPCODE_LENGTH(op_get_by_id);
}
-#else //!ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
-
-// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair.
-void JIT::emit_op_method_check(Instruction*) {}
-void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
-
-#endif
-
void JIT::emit_op_get_by_id(Instruction* currentInstruction)
{
unsigned resultVReg = currentInstruction[1].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
emitGetVirtualRegister(baseVReg, regT0);
- compileGetByIdHotPath(resultVReg, baseVReg, ident, m_propertyAccessInstructionIndex++);
+ compileGetByIdHotPath(baseVReg, ident);
+ emitValueProfilingSite();
emitPutVirtualRegister(resultVReg);
}
-void JIT::compileGetByIdHotPath(int, int baseVReg, Identifier*, unsigned propertyAccessInstructionIndex)
+void JIT::compileGetByIdHotPath(int baseVReg, Identifier*)
{
// As for put_by_id, get_by_id requires the offset of the Structure and the offset of the access to be patched.
// Additionally, for get_by_id we need patch the offset of the branch to the slow case (we patch this to jump
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
DataLabelPtr structureToCompare;
- Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
+ PatchableJump structureCheck = patchableBranchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
addSlowCase(structureCheck);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetGetByIdStructure);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureCheck), patchOffsetGetByIdBranchToSlowCase)
-
- Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
- Label externalLoadComplete(this);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, externalLoad), patchOffsetGetByIdExternalLoad);
- ASSERT_JIT_OFFSET(differenceBetween(externalLoad, externalLoadComplete), patchLengthGetByIdExternalLoad);
- DataLabel32 displacementLabel = loadPtrWithAddressOffsetPatch(Address(regT0, patchGetByIdDefaultOffset), regT0);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, displacementLabel), patchOffsetGetByIdPropertyMapOffset);
+ loadPtr(Address(regT0, JSObject::offsetOfPropertyStorage()), regT0);
+ DataLabelCompact displacementLabel = loadPtrWithCompactAddressOffsetPatch(Address(regT0, patchGetByIdDefaultOffset), regT0);
Label putResult(this);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, putResult), patchOffsetGetByIdPutResult);
+ m_propertyAccessCompilationInfo.append(PropertyStubCompilationInfo(PropertyStubGetById, m_bytecodeOffset, hotPathBegin, structureToCompare, structureCheck, displacementLabel, putResult));
}
void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
compileGetByIdSlowCase(resultVReg, baseVReg, ident, iter, false);
+ emitValueProfilingSite();
}
void JIT::compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck)
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
-#ifndef NDEBUG
Label coldPathBegin(this);
-#endif
JITStubCall stubCall(this, isMethodCheck ? cti_op_get_by_id_method_check : cti_op_get_by_id);
stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(ident));
+ stubCall.addArgument(TrustedImmPtr(ident));
Call call = stubCall.call(resultVReg);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
- ASSERT_JIT_OFFSET(differenceBetween(coldPathBegin, call), patchOffsetGetByIdSlowCaseCall);
-
// Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
- m_propertyAccessInstructionIndex++;
+ m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex++].slowCaseInfo(PropertyStubGetById, coldPathBegin, call);
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
unsigned baseVReg = currentInstruction[1].u.operand;
unsigned valueVReg = currentInstruction[3].u.operand;
- unsigned propertyAccessInstructionIndex = m_propertyAccessInstructionIndex++;
-
// In order to be able to patch both the Structure, and the object offset, we store one pointer,
// to just after the arguments have been loaded into registers 'hotPathBegin', and we generate code
// such that the Structure & offset are always at the same distance from this.
BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
Label hotPathBegin(this);
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
// It is important that the following instruction plants a 32bit immediate, in order that it can be patched over.
DataLabelPtr structureToCompare;
- addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetPutByIdStructure);
+ addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
- // Plant a load from a bogus ofset in the object's property map; we will patch this later, if it is to be used.
- Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
- Label externalLoadComplete(this);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, externalLoad), patchOffsetPutByIdExternalLoad);
- ASSERT_JIT_OFFSET(differenceBetween(externalLoad, externalLoadComplete), patchLengthPutByIdExternalLoad);
-
- DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(regT1, Address(regT0, patchGetByIdDefaultOffset));
+ loadPtr(Address(regT0, JSObject::offsetOfPropertyStorage()), regT2);
+ DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(regT1, Address(regT2, patchPutByIdDefaultOffset));
END_UNINTERRUPTED_SEQUENCE(sequencePutById);
- ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, displacementLabel), patchOffsetPutByIdPropertyMapOffset);
+ emitWriteBarrier(regT0, regT1, regT2, regT3, ShouldFilterImmediates, WriteBarrierForPropertyAccess);
+
+ m_propertyAccessCompilationInfo.append(PropertyStubCompilationInfo(PropertyStubPutById, m_bytecodeOffset, hotPathBegin, structureToCompare, displacementLabel));
}
void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned baseVReg = currentInstruction[1].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand));
-
- unsigned propertyAccessInstructionIndex = m_propertyAccessInstructionIndex++;
+ unsigned direct = currentInstruction[8].u.operand;
linkSlowCaseIfNotJSCell(iter, baseVReg);
linkSlowCase(iter);
- JITStubCall stubCall(this, cti_op_put_by_id);
+ JITStubCall stubCall(this, direct ? cti_op_put_by_id_direct : cti_op_put_by_id);
stubCall.addArgument(regT0);
- stubCall.addArgument(ImmPtr(ident));
+ stubCall.addArgument(TrustedImmPtr(ident));
stubCall.addArgument(regT1);
Call call = stubCall.call();
// Track the location of the call; this will be used to recover patch information.
- m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].callReturnLocation = call;
+ m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex++].slowCaseInfo(PropertyStubPutById, call);
}
// Compile a store into an object's property storage. May overwrite the
// value in objectReg.
-void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, Structure* structure, size_t cachedOffset)
+void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, size_t cachedOffset)
{
int offset = cachedOffset * sizeof(JSValue);
- if (structure->isUsingInlineStorage())
- offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage);
- else
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
+ loadPtr(Address(base, JSObject::offsetOfPropertyStorage()), base);
storePtr(value, Address(base, offset));
}
// Compile a load from an object's property storage. May overwrite base.
-void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, Structure* structure, size_t cachedOffset)
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, size_t cachedOffset)
{
int offset = cachedOffset * sizeof(JSValue);
- if (structure->isUsingInlineStorage())
- offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage);
- else
- loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
- loadPtr(Address(base, offset), result);
-}
-
-void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID result, size_t cachedOffset)
-{
- if (base->isUsingInlineStorage())
- loadPtr(static_cast<void*>(&base->m_inlineStorage[cachedOffset]), result);
- else {
- PropertyStorage* protoPropertyStorage = &base->m_externalStorage;
- loadPtr(static_cast<void*>(protoPropertyStorage), temp);
- loadPtr(Address(temp, cachedOffset * sizeof(JSValue)), result);
- }
+ loadPtr(Address(base, JSObject::offsetOfPropertyStorage()), result);
+ loadPtr(Address(result, offset), result);
}
-void JIT::testPrototype(Structure* structure, JumpList& failureCases)
+void JIT::compileGetDirectOffset(JSObject* base, RegisterID result, size_t cachedOffset)
{
- if (structure->m_prototype.isNull())
- return;
-
- move(ImmPtr(&asCell(structure->m_prototype)->m_structure), regT2);
- move(ImmPtr(asCell(structure->m_prototype)->m_structure), regT3);
- failureCases.append(branchPtr(NotEqual, Address(regT2), regT3));
+ loadPtr(base->addressOfPropertyStorage(), result);
+ loadPtr(Address(result, cachedOffset * sizeof(WriteBarrier<Unknown>)), result);
}
-void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress)
+void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
{
JumpList failureCases;
// Check eax is an object of the right Structure.
failureCases.append(emitJumpIfNotJSCell(regT0));
- failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
- testPrototype(oldStructure, failureCases);
+ failureCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(oldStructure)));
+
+ testPrototype(oldStructure->storedPrototype(), failureCases);
+
+ ASSERT(oldStructure->storedPrototype().isNull() || oldStructure->storedPrototype().asCell()->structure() == chain->head()->get());
// ecx = baseObject->m_structure
- for (RefPtr<Structure>* it = chain->head(); *it; ++it)
- testPrototype(it->get(), failureCases);
-
- Call callTarget;
+ if (!direct) {
+ for (WriteBarrier<Structure>* it = chain->head(); *it; ++it) {
+ ASSERT((*it)->storedPrototype().isNull() || (*it)->storedPrototype().asCell()->structure() == it[1].get());
+ testPrototype((*it)->storedPrototype(), failureCases);
+ }
+ }
+ // If we succeed in all of our checks, and the code was optimizable, then make sure we
+ // decrement the rare case counter.
+#if ENABLE(VALUE_PROFILER)
+ if (m_codeBlock->canCompileWithDFG()) {
+ sub32(
+ TrustedImm32(1),
+ AbsoluteAddress(&m_codeBlock->rareCaseProfileForBytecodeOffset(stubInfo->bytecodeIndex)->m_counter));
+ }
+#endif
+
// emit a call only if storage realloc is needed
bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
if (willNeedStorageRealloc) {
stubCall.skipArgument(); // base
stubCall.skipArgument(); // ident
stubCall.skipArgument(); // value
- stubCall.addArgument(Imm32(oldStructure->propertyStorageCapacity()));
- stubCall.addArgument(Imm32(newStructure->propertyStorageCapacity()));
+ stubCall.addArgument(TrustedImm32(oldStructure->propertyStorageCapacity()));
+ stubCall.addArgument(TrustedImmPtr(newStructure));
stubCall.call(regT0);
emitGetJITStubArg(2, regT1);
restoreReturnAddressBeforeReturn(regT3);
}
- // Assumes m_refCount can be decremented easily, refcount decrement is safe as
- // codeblock should ensure oldStructure->m_refCount > 0
- sub32(Imm32(1), AbsoluteAddress(oldStructure->addressOfCount()));
- add32(Imm32(1), AbsoluteAddress(newStructure->addressOfCount()));
- storePtr(ImmPtr(newStructure), Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)));
+ // Planting the new structure triggers the write barrier so we need
+ // an unconditional barrier here.
+ emitWriteBarrier(regT0, regT1, regT2, regT3, UnconditionalWriteBarrier, WriteBarrierForPropertyAccess);
- // write the value
- compilePutDirectOffset(regT0, regT1, newStructure, cachedOffset);
+ ASSERT(newStructure->classInfo() == oldStructure->classInfo());
+ storePtr(TrustedImmPtr(newStructure), Address(regT0, JSCell::structureOffset()));
+ compilePutDirectOffset(regT0, regT1, cachedOffset);
ret();
restoreArgumentReferenceForTrampoline();
Call failureCall = tailRecursiveCall();
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
- patchBuffer.link(failureCall, FunctionPtr(cti_op_put_by_id_fail));
+ patchBuffer.link(failureCall, FunctionPtr(direct ? cti_op_put_by_id_direct_fail : cti_op_put_by_id_fail));
if (willNeedStorageRealloc) {
ASSERT(m_calls.size() == 1);
patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc));
}
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
+ stubInfo->stubRoutine = patchBuffer.finalizeCode();
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relinkCallerToTrampoline(returnAddress, entryLabel);
+ repatchBuffer.relinkCallerToTrampoline(returnAddress, CodeLocationLabel(stubInfo->stubRoutine.code()));
}
void JIT::patchGetByIdSelf(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
int offset = sizeof(JSValue) * cachedOffset;
- // If we're patching to use inline storage, convert the initial load to a lea; this avoids the extra load
- // and makes the subsequent load's offset automatically correct
- if (structure->isUsingInlineStorage())
- repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetGetByIdExternalLoad));
-
// Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetGetByIdStructure), structure);
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset), offset);
-}
-
-void JIT::patchMethodCallProto(CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, JSFunction* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
-{
- RepatchBuffer repatchBuffer(codeBlock);
-
- ASSERT(!methodCallLinkInfo.cachedStructure);
- methodCallLinkInfo.cachedStructure = structure;
- structure->ref();
-
- Structure* prototypeStructure = proto->structure();
- ASSERT(!methodCallLinkInfo.cachedPrototypeStructure);
- methodCallLinkInfo.cachedPrototypeStructure = prototypeStructure;
- prototypeStructure->ref();
-
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel, structure);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoObj), proto);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoStruct), prototypeStructure);
- repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckPutFunction), callee);
-
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id));
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.get.structureToCompare), structure);
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel), offset);
}
-void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
+void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct)
{
RepatchBuffer repatchBuffer(codeBlock);
// We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
// Should probably go to cti_op_put_by_id_fail, but that doesn't do anything interesting right now.
- repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_put_by_id_generic));
+ repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(direct ? cti_op_put_by_id_direct_generic : cti_op_put_by_id_generic));
int offset = sizeof(JSValue) * cachedOffset;
- // If we're patching to use inline storage, convert the initial load to a lea; this avoids the extra load
- // and makes the subsequent load's offset automatically correct
- if (structure->isUsingInlineStorage())
- repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetPutByIdExternalLoad));
-
// Patch the offset into the propoerty map to load from, then patch the Structure to look for.
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetPutByIdStructure), structure);
- repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset), offset);
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.put.structureToCompare), structure);
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(stubInfo->patch.baseline.u.put.displacementLabel), offset);
}
void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
// Check eax is an array
- Jump failureCases1 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr));
+ Jump failureCases1 = branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSArray::s_info));
// Checks out okay! - get the length from the storage
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
- load32(Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
-
- Jump failureCases2 = branch32(Above, regT2, Imm32(JSImmediate::maxImmediateInt));
+ loadPtr(Address(regT0, JSArray::storageOffset()), regT3);
+ load32(Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
+ Jump failureCases2 = branch32(LessThan, regT2, TrustedImm32(0));
emitFastArithIntToImmNoCheck(regT2, regT0);
Jump success = jump();
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
// Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
+ CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
// On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
// Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
+ stubInfo->stubRoutine = patchBuffer.finalizeCode();
// Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
+ CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubInfo->stubRoutine.code()));
// We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail));
}
-void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
+void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
// The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is
// referencing the prototype object - let's speculatively load it's table nice and early!)
Jump failureCases1 = checkStructure(regT0, structure);
// Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(prototypeStructure), regT3);
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
-#else
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
-
- // Checks out okay! - getDirectOffset
- compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
+ move(TrustedImmPtr(protoObject), regT3);
+ Jump failureCases2 = branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototypeStructure));
+ bool needsStubLink = false;
+
+ // Checks out okay!
+ if (slot.cachedPropertyType() == PropertySlot::Getter) {
+ needsStubLink = true;
+ compileGetDirectOffset(protoObject, regT1, cachedOffset);
+ JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
+ stubCall.addArgument(regT1);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
+ needsStubLink = true;
+ JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
+ stubCall.addArgument(TrustedImmPtr(protoObject));
+ stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
+ stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else
+ compileGetDirectOffset(protoObject, regT0, cachedOffset);
Jump success = jump();
-
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
// Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
+ CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
// On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
+ if (needsStubLink) {
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
+ if (iter->to)
+ patchBuffer.link(iter->from, FunctionPtr(iter->to));
+ }
+ }
// Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
+ stubInfo->stubRoutine = patchBuffer.finalizeCode();
// Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
+ CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubInfo->stubRoutine.code()));
// We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
-void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, size_t cachedOffset)
+void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
{
Jump failureCase = checkStructure(regT0, structure);
- compileGetDirectOffset(regT0, regT0, structure, cachedOffset);
+ bool needsStubLink = false;
+ bool isDirect = false;
+ if (slot.cachedPropertyType() == PropertySlot::Getter) {
+ needsStubLink = true;
+ compileGetDirectOffset(regT0, regT1, cachedOffset);
+ JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
+ stubCall.addArgument(regT1);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
+ needsStubLink = true;
+ JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
+ stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else {
+ isDirect = true;
+ compileGetDirectOffset(regT0, regT0, cachedOffset);
+ }
Jump success = jump();
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
+
+ if (needsStubLink) {
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
+ if (iter->to)
+ patchBuffer.link(iter->from, FunctionPtr(iter->to));
+ }
+ }
// Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine;
+ CodeLocationLabel lastProtoBegin = CodeLocationLabel(polymorphicStructures->list[currentIndex - 1].stubRoutine.code());
if (!lastProtoBegin)
- lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
+ lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCase, lastProtoBegin);
// On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
+ MacroAssemblerCodeRef stubCode = patchBuffer.finalizeCode();
- structure->ref();
- polymorphicStructures->list[currentIndex].set(entryLabel, structure);
+ polymorphicStructures->list[currentIndex].set(*m_globalData, m_codeBlock->ownerExecutable(), stubCode, structure, isDirect);
// Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
+ CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubCode.code()));
}
-void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, CallFrame* callFrame)
+void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame)
{
// The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is
// referencing the prototype object - let's speculatively load it's table nice and early!)
Jump failureCases1 = checkStructure(regT0, structure);
// Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(prototypeStructure), regT3);
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
-#else
- Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
-#endif
-
- // Checks out okay! - getDirectOffset
- compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
+ move(TrustedImmPtr(protoObject), regT3);
+ Jump failureCases2 = branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototypeStructure));
+
+ // Checks out okay!
+ bool needsStubLink = false;
+ bool isDirect = false;
+ if (slot.cachedPropertyType() == PropertySlot::Getter) {
+ needsStubLink = true;
+ compileGetDirectOffset(protoObject, regT1, cachedOffset);
+ JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
+ stubCall.addArgument(regT1);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
+ needsStubLink = true;
+ JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
+ stubCall.addArgument(TrustedImmPtr(protoObject));
+ stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
+ stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else {
+ isDirect = true;
+ compileGetDirectOffset(protoObject, regT0, cachedOffset);
+ }
Jump success = jump();
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
+
+ if (needsStubLink) {
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
+ if (iter->to)
+ patchBuffer.link(iter->from, FunctionPtr(iter->to));
+ }
+ }
// Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
+ CodeLocationLabel lastProtoBegin = CodeLocationLabel(prototypeStructures->list[currentIndex - 1].stubRoutine.code());
patchBuffer.link(failureCases1, lastProtoBegin);
patchBuffer.link(failureCases2, lastProtoBegin);
// On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
-
- structure->ref();
- prototypeStructure->ref();
- prototypeStructures->list[currentIndex].set(entryLabel, structure, prototypeStructure);
+ MacroAssemblerCodeRef stubCode = patchBuffer.finalizeCode();
+ prototypeStructures->list[currentIndex].set(*m_globalData, m_codeBlock->ownerExecutable(), stubCode, structure, prototypeStructure, isDirect);
// Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
+ CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubCode.code()));
}
-void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, CallFrame* callFrame)
+void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame)
{
ASSERT(count);
-
JumpList bucketsOfFail;
// Check eax is an object of the right Structure.
bucketsOfFail.append(baseObjectCheck);
Structure* currStructure = structure;
- RefPtr<Structure>* chainEntries = chain->head();
+ WriteBarrier<Structure>* it = chain->head();
JSObject* protoObject = 0;
- for (unsigned i = 0; i < count; ++i) {
+ for (unsigned i = 0; i < count; ++i, ++it) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
- currStructure = chainEntries[i].get();
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(currStructure), regT3);
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
-#else
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
-#endif
+ currStructure = it->get();
+ testPrototype(protoObject, bucketsOfFail);
}
ASSERT(protoObject);
-
- compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
+
+ bool needsStubLink = false;
+ bool isDirect = false;
+ if (slot.cachedPropertyType() == PropertySlot::Getter) {
+ needsStubLink = true;
+ compileGetDirectOffset(protoObject, regT1, cachedOffset);
+ JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
+ stubCall.addArgument(regT1);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
+ needsStubLink = true;
+ JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
+ stubCall.addArgument(TrustedImmPtr(protoObject));
+ stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
+ stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else {
+ isDirect = true;
+ compileGetDirectOffset(protoObject, regT0, cachedOffset);
+ }
Jump success = jump();
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
+
+ if (needsStubLink) {
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
+ if (iter->to)
+ patchBuffer.link(iter->from, FunctionPtr(iter->to));
+ }
+ }
// Use the patch information to link the failure cases back to the original slow case routine.
- CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
+ CodeLocationLabel lastProtoBegin = CodeLocationLabel(prototypeStructures->list[currentIndex - 1].stubRoutine.code());
patchBuffer.link(bucketsOfFail, lastProtoBegin);
// On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
+ CodeRef stubRoutine = patchBuffer.finalizeCode();
// Track the stub we have created so that it will be deleted later.
- structure->ref();
- chain->ref();
- prototypeStructures->list[currentIndex].set(entryLabel, structure, chain);
+ prototypeStructures->list[currentIndex].set(callFrame->globalData(), m_codeBlock->ownerExecutable(), stubRoutine, structure, chain, isDirect);
// Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
+ CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine.code()));
}
-void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
+void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
ASSERT(count);
-
+
JumpList bucketsOfFail;
// Check eax is an object of the right Structure.
bucketsOfFail.append(checkStructure(regT0, structure));
Structure* currStructure = structure;
- RefPtr<Structure>* chainEntries = chain->head();
+ WriteBarrier<Structure>* it = chain->head();
JSObject* protoObject = 0;
- for (unsigned i = 0; i < count; ++i) {
+ for (unsigned i = 0; i < count; ++i, ++it) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
- currStructure = chainEntries[i].get();
-
- // Check the prototype object's Structure had not changed.
- Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if CPU(X86_64)
- move(ImmPtr(currStructure), regT3);
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
-#else
- bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
-#endif
+ currStructure = it->get();
+ testPrototype(protoObject, bucketsOfFail);
}
ASSERT(protoObject);
- compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
+ bool needsStubLink = false;
+ if (slot.cachedPropertyType() == PropertySlot::Getter) {
+ needsStubLink = true;
+ compileGetDirectOffset(protoObject, regT1, cachedOffset);
+ JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
+ stubCall.addArgument(regT1);
+ stubCall.addArgument(regT0);
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else if (slot.cachedPropertyType() == PropertySlot::Custom) {
+ needsStubLink = true;
+ JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
+ stubCall.addArgument(TrustedImmPtr(protoObject));
+ stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
+ stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
+ stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
+ stubCall.call();
+ } else
+ compileGetDirectOffset(protoObject, regT0, cachedOffset);
Jump success = jump();
- LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
+ LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
+
+ if (needsStubLink) {
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
+ if (iter->to)
+ patchBuffer.link(iter->from, FunctionPtr(iter->to));
+ }
+ }
// Use the patch information to link the failure cases back to the original slow case routine.
- patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall));
+ patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin));
// On success return back to the hot patch code, at a point it will perform the store to dest for us.
- patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
+ patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
// Track the stub we have created so that it will be deleted later.
- CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
- stubInfo->stubRoutine = entryLabel;
+ CodeRef stubRoutine = patchBuffer.finalizeCode();
+ stubInfo->stubRoutine = stubRoutine;
// Finally patch the jump to slow case back in the hot path to jump here instead.
- CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
+ CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
- repatchBuffer.relink(jumpLocation, entryLabel);
+ repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine.code()));
// We don't want to patch more than once - in future go to cti_op_put_by_id_generic.
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
-/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */
+void JIT::emit_op_get_scoped_var(Instruction* currentInstruction)
+{
+ int skip = currentInstruction[3].u.operand;
+
+ emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT0);
+ bool checkTopLevel = m_codeBlock->codeType() == FunctionCode && m_codeBlock->needsFullScopeChain();
+ ASSERT(skip || !checkTopLevel);
+ if (checkTopLevel && skip--) {
+ Jump activationNotCreated;
+ if (checkTopLevel)
+ activationNotCreated = branchTestPtr(Zero, addressFor(m_codeBlock->activationRegister()));
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(ScopeChainNode, next)), regT0);
+ activationNotCreated.link(this);
+ }
+ while (skip--)
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(ScopeChainNode, next)), regT0);
+
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(ScopeChainNode, object)), regT0);
+ loadPtr(Address(regT0, JSVariableObject::offsetOfRegisters()), regT0);
+ loadPtr(Address(regT0, currentInstruction[2].u.operand * sizeof(Register)), regT0);
+ emitValueProfilingSite();
+ emitPutVirtualRegister(currentInstruction[1].u.operand);
+}
+
+void JIT::emit_op_put_scoped_var(Instruction* currentInstruction)
+{
+ int skip = currentInstruction[2].u.operand;
+
+ emitGetVirtualRegister(currentInstruction[3].u.operand, regT0);
+
+ emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1);
+ bool checkTopLevel = m_codeBlock->codeType() == FunctionCode && m_codeBlock->needsFullScopeChain();
+ ASSERT(skip || !checkTopLevel);
+ if (checkTopLevel && skip--) {
+ Jump activationNotCreated;
+ if (checkTopLevel)
+ activationNotCreated = branchTestPtr(Zero, addressFor(m_codeBlock->activationRegister()));
+ loadPtr(Address(regT1, OBJECT_OFFSETOF(ScopeChainNode, next)), regT1);
+ activationNotCreated.link(this);
+ }
+ while (skip--)
+ loadPtr(Address(regT1, OBJECT_OFFSETOF(ScopeChainNode, next)), regT1);
+ loadPtr(Address(regT1, OBJECT_OFFSETOF(ScopeChainNode, object)), regT1);
+
+ emitWriteBarrier(regT1, regT0, regT2, regT3, ShouldFilterImmediates, WriteBarrierForVariableAccess);
+
+ loadPtr(Address(regT1, JSVariableObject::offsetOfRegisters()), regT1);
+ storePtr(regT0, Address(regT1, currentInstruction[1].u.operand * sizeof(Register)));
+}
+
+void JIT::emit_op_get_global_var(Instruction* currentInstruction)
+{
+ JSVariableObject* globalObject = m_codeBlock->globalObject();
+ loadPtr(&globalObject->m_registers, regT0);
+ loadPtr(Address(regT0, currentInstruction[2].u.operand * sizeof(Register)), regT0);
+ emitValueProfilingSite();
+ emitPutVirtualRegister(currentInstruction[1].u.operand);
+}
+
+void JIT::emit_op_put_global_var(Instruction* currentInstruction)
+{
+ JSGlobalObject* globalObject = m_codeBlock->globalObject();
+
+ emitGetVirtualRegister(currentInstruction[2].u.operand, regT0);
+
+ move(TrustedImmPtr(globalObject), regT1);
+ loadPtr(Address(regT1, JSVariableObject::offsetOfRegisters()), regT1);
+ storePtr(regT0, Address(regT1, currentInstruction[1].u.operand * sizeof(Register)));
+ emitWriteBarrier(globalObject, regT0, regT2, ShouldFilterImmediates, WriteBarrierForVariableAccess);
+}
+
+void JIT::resetPatchGetById(RepatchBuffer& repatchBuffer, StructureStubInfo* stubInfo)
+{
+ repatchBuffer.relink(stubInfo->callReturnLocation, cti_op_get_by_id);
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.get.structureToCompare), reinterpret_cast<void*>(-1));
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel), 0);
+ repatchBuffer.relink(stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck), stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin));
+}
+
+void JIT::resetPatchPutById(RepatchBuffer& repatchBuffer, StructureStubInfo* stubInfo)
+{
+ if (isDirectPutById(stubInfo))
+ repatchBuffer.relink(stubInfo->callReturnLocation, cti_op_put_by_id_direct);
+ else
+ repatchBuffer.relink(stubInfo->callReturnLocation, cti_op_put_by_id);
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.put.structureToCompare), reinterpret_cast<void*>(-1));
+ repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.put.displacementLabel), 0);
+}
+
+#endif // USE(JSVALUE64)
+
+void JIT::emitWriteBarrier(RegisterID owner, RegisterID value, RegisterID scratch, RegisterID scratch2, WriteBarrierMode mode, WriteBarrierUseKind useKind)
+{
+ UNUSED_PARAM(owner);
+ UNUSED_PARAM(scratch);
+ UNUSED_PARAM(scratch2);
+ UNUSED_PARAM(useKind);
+ UNUSED_PARAM(value);
+ UNUSED_PARAM(mode);
+ ASSERT(owner != scratch);
+ ASSERT(owner != scratch2);
+
+#if ENABLE(WRITE_BARRIER_PROFILING)
+ emitCount(WriteBarrierCounters::jitCounterFor(useKind));
+#endif
+
+#if ENABLE(GGC)
+ Jump filterCells;
+ if (mode == ShouldFilterImmediates)
+ filterCells = emitJumpIfNotJSCell(value);
+ move(owner, scratch);
+ andPtr(TrustedImm32(static_cast<int32_t>(MarkedBlock::blockMask)), scratch);
+ move(owner, scratch2);
+ // consume additional 8 bits as we're using an approximate filter
+ rshift32(TrustedImm32(MarkedBlock::atomShift + 8), scratch2);
+ andPtr(TrustedImm32(MarkedBlock::atomMask >> 8), scratch2);
+ Jump filter = branchTest8(Zero, BaseIndex(scratch, scratch2, TimesOne, MarkedBlock::offsetOfMarks()));
+ move(owner, scratch2);
+ rshift32(TrustedImm32(MarkedBlock::cardShift), scratch2);
+ andPtr(TrustedImm32(MarkedBlock::cardMask), scratch2);
+ store8(TrustedImm32(1), BaseIndex(scratch, scratch2, TimesOne, MarkedBlock::offsetOfCards()));
+ filter.link(this);
+ if (mode == ShouldFilterImmediates)
+ filterCells.link(this);
+#endif
+}
+
+void JIT::emitWriteBarrier(JSCell* owner, RegisterID value, RegisterID scratch, WriteBarrierMode mode, WriteBarrierUseKind useKind)
+{
+ UNUSED_PARAM(owner);
+ UNUSED_PARAM(scratch);
+ UNUSED_PARAM(useKind);
+ UNUSED_PARAM(value);
+ UNUSED_PARAM(mode);
+
+#if ENABLE(WRITE_BARRIER_PROFILING)
+ emitCount(WriteBarrierCounters::jitCounterFor(useKind));
+#endif
+
+#if ENABLE(GGC)
+ Jump filterCells;
+ if (mode == ShouldFilterImmediates)
+ filterCells = emitJumpIfNotJSCell(value);
+ uint8_t* cardAddress = Heap::addressOfCardFor(owner);
+ move(TrustedImmPtr(cardAddress), scratch);
+ store8(TrustedImm32(1), Address(scratch));
+ if (mode == ShouldFilterImmediates)
+ filterCells.link(this);
+#endif
+}
+
+void JIT::testPrototype(JSValue prototype, JumpList& failureCases)
+{
+ if (prototype.isNull())
+ return;
-#endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
+ ASSERT(prototype.isCell());
+ move(TrustedImmPtr(prototype.asCell()), regT3);
+ failureCases.append(branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototype.asCell()->structure())));
+}
-#endif // USE(JSVALUE32_64)
+void JIT::patchMethodCallProto(JSGlobalData& globalData, CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, StructureStubInfo& stubInfo, JSObject* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
+{
+ RepatchBuffer repatchBuffer(codeBlock);
+
+ CodeLocationDataLabelPtr structureLocation = methodCallLinkInfo.cachedStructure.location();
+ methodCallLinkInfo.cachedStructure.set(globalData, structureLocation, codeBlock->ownerExecutable(), structure);
+
+ Structure* prototypeStructure = proto->structure();
+ methodCallLinkInfo.cachedPrototypeStructure.set(globalData, structureLocation.dataLabelPtrAtOffset(stubInfo.patch.baseline.methodCheckProtoStructureToCompare), codeBlock->ownerExecutable(), prototypeStructure);
+ methodCallLinkInfo.cachedPrototype.set(globalData, structureLocation.dataLabelPtrAtOffset(stubInfo.patch.baseline.methodCheckProtoObj), codeBlock->ownerExecutable(), proto);
+ methodCallLinkInfo.cachedFunction.set(globalData, structureLocation.dataLabelPtrAtOffset(stubInfo.patch.baseline.methodCheckPutFunction), codeBlock->ownerExecutable(), callee);
+ repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_method_check_update));
+}
+
+bool JIT::isDirectPutById(StructureStubInfo* stubInfo)
+{
+ switch (stubInfo->accessType) {
+ case access_put_by_id_transition_normal:
+ return false;
+ case access_put_by_id_transition_direct:
+ return true;
+ case access_put_by_id_replace:
+ case access_put_by_id_generic: {
+ void* oldCall = MacroAssembler::readCallTarget(stubInfo->callReturnLocation).executableAddress();
+ if (oldCall == bitwise_cast<void*>(cti_op_put_by_id_direct)
+ || oldCall == bitwise_cast<void*>(cti_op_put_by_id_direct_generic)
+ || oldCall == bitwise_cast<void*>(cti_op_put_by_id_direct_fail))
+ return true;
+ ASSERT(oldCall == bitwise_cast<void*>(cti_op_put_by_id)
+ || oldCall == bitwise_cast<void*>(cti_op_put_by_id_generic)
+ || oldCall == bitwise_cast<void*>(cti_op_put_by_id_fail));
+ return false;
+ }
+ default:
+ ASSERT_NOT_REACHED();
+ return false;
+ }
+}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff