/* * Copyright (C) 2008-2019 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #if ENABLE(JIT) // We've run into some problems where changing the size of the class JIT leads to // performance fluctuations. Try forcing alignment in an attempt to stabilize this. #if COMPILER(GCC_COMPATIBLE) #define JIT_CLASS_ALIGNMENT alignas(32) #else #define JIT_CLASS_ALIGNMENT #endif #define ASSERT_JIT_OFFSET(actual, expected) ASSERT_WITH_MESSAGE(actual == expected, "JIT Offset \"%s\" should be %d, not %d.\n", #expected, static_cast(expected), static_cast(actual)); #include "ByValInfo.h" #include "CodeBlock.h" #include "CommonSlowPaths.h" #include "JITDisassembler.h" #include "JITInlineCacheGenerator.h" #include "JITMathIC.h" #include "JITRightShiftGenerator.h" #include "JSInterfaceJIT.h" #include "PCToCodeOriginMap.h" #include "UnusedPointer.h" namespace JSC { enum OpcodeID : unsigned; class ArrayAllocationProfile; class CallLinkInfo; class CodeBlock; class FunctionExecutable; class JIT; class Identifier; class Interpreter; class BlockDirectory; class Register; class StructureChain; class StructureStubInfo; struct Instruction; struct OperandTypes; struct SimpleJumpTable; struct StringJumpTable; struct OpPutByVal; struct OpPutByValDirect; struct OpPutPrivateName; struct OpPutToScope; template struct CallRecord { MacroAssembler::Call from; BytecodeIndex bytecodeIndex; FunctionPtr callee; CallRecord() { } CallRecord(MacroAssembler::Call from, BytecodeIndex bytecodeIndex, FunctionPtr callee) : from(from) , bytecodeIndex(bytecodeIndex) , callee(callee) { } }; using FarCallRecord = CallRecord; using NearCallRecord = CallRecord; struct JumpTable { MacroAssembler::Jump from; unsigned toBytecodeOffset; JumpTable(MacroAssembler::Jump f, unsigned t) : from(f) , toBytecodeOffset(t) { } }; struct SlowCaseEntry { MacroAssembler::Jump from; BytecodeIndex to; SlowCaseEntry(MacroAssembler::Jump f, BytecodeIndex t) : from(f) , to(t) { } }; struct SwitchRecord { enum Type { Immediate, Character, String }; Type type; union { SimpleJumpTable* simpleJumpTable; StringJumpTable* stringJumpTable; } jumpTable; BytecodeIndex bytecodeIndex; unsigned defaultOffset; SwitchRecord(SimpleJumpTable* jumpTable, BytecodeIndex bytecodeIndex, unsigned defaultOffset, Type type) : type(type) , bytecodeIndex(bytecodeIndex) , defaultOffset(defaultOffset) { this->jumpTable.simpleJumpTable = jumpTable; } SwitchRecord(StringJumpTable* jumpTable, BytecodeIndex bytecodeIndex, unsigned defaultOffset) : type(String) , bytecodeIndex(bytecodeIndex) , defaultOffset(defaultOffset) { this->jumpTable.stringJumpTable = jumpTable; } }; struct ByValCompilationInfo { ByValCompilationInfo() { } ByValCompilationInfo(ByValInfo* byValInfo, BytecodeIndex bytecodeIndex, MacroAssembler::PatchableJump notIndexJump, MacroAssembler::PatchableJump badTypeJump, JITArrayMode arrayMode, ArrayProfile* arrayProfile, MacroAssembler::Label doneTarget, MacroAssembler::Label nextHotPathTarget) : byValInfo(byValInfo) , bytecodeIndex(bytecodeIndex) , notIndexJump(notIndexJump) , badTypeJump(badTypeJump) , arrayMode(arrayMode) , arrayProfile(arrayProfile) , doneTarget(doneTarget) , nextHotPathTarget(nextHotPathTarget) { } ByValCompilationInfo(ByValInfo* byValInfo, BytecodeIndex bytecodeIndex, MacroAssembler::PatchableJump notIndexJump, MacroAssembler::Label doneTarget, MacroAssembler::Label nextHotPathTarget) : byValInfo(byValInfo) , bytecodeIndex(bytecodeIndex) , notIndexJump(notIndexJump) , doneTarget(doneTarget) , nextHotPathTarget(nextHotPathTarget) { } ByValInfo* byValInfo; BytecodeIndex bytecodeIndex; MacroAssembler::PatchableJump notIndexJump; MacroAssembler::PatchableJump badTypeJump; JITArrayMode arrayMode; ArrayProfile* arrayProfile; MacroAssembler::Label doneTarget; MacroAssembler::Label nextHotPathTarget; MacroAssembler::Label slowPathTarget; MacroAssembler::Call returnAddress; }; struct CallCompilationInfo { MacroAssembler::DataLabelPtr hotPathBegin; MacroAssembler::Call hotPathOther; MacroAssembler::Call callReturnLocation; CallLinkInfo* callLinkInfo; }; void ctiPatchCallByReturnAddress(ReturnAddressPtr, FunctionPtr newCalleeFunction); class JIT_CLASS_ALIGNMENT JIT : private JSInterfaceJIT { friend class JITSlowPathCall; friend class JITStubCall; using MacroAssembler::Jump; using MacroAssembler::JumpList; using MacroAssembler::Label; static constexpr uintptr_t patchGetByIdDefaultStructure = unusedPointer; static constexpr int patchGetByIdDefaultOffset = 0; // Magic number - initial offset cannot be representable as a signed 8bit value, or the X86Assembler // will compress the displacement, and we may not be able to fit a patched offset. static constexpr int patchPutByIdDefaultOffset = 256; public: JIT(VM&, CodeBlock* = nullptr, BytecodeIndex loopOSREntryBytecodeOffset = BytecodeIndex(0)); ~JIT(); VM& vm() { return *JSInterfaceJIT::vm(); } void compileWithoutLinking(JITCompilationEffort); CompilationResult link(); void doMainThreadPreparationBeforeCompile(); static CompilationResult compile(VM& vm, CodeBlock* codeBlock, JITCompilationEffort effort, BytecodeIndex bytecodeOffset = BytecodeIndex(0)) { return JIT(vm, codeBlock, bytecodeOffset).privateCompile(effort); } static void compilePutByVal(const ConcurrentJSLocker& locker, VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode) { JIT jit(vm, codeBlock); jit.m_bytecodeIndex = byValInfo->bytecodeIndex; jit.privateCompilePutByVal(locker, byValInfo, returnAddress, arrayMode); } static void compileDirectPutByVal(const ConcurrentJSLocker& locker, VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode) { JIT jit(vm, codeBlock); jit.m_bytecodeIndex = byValInfo->bytecodeIndex; jit.privateCompilePutByVal(locker, byValInfo, returnAddress, arrayMode); } template static void compilePutByValWithCachedId(VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, PutKind putKind, CacheableIdentifier propertyName) { JIT jit(vm, codeBlock); jit.m_bytecodeIndex = byValInfo->bytecodeIndex; jit.privateCompilePutByValWithCachedId(byValInfo, returnAddress, putKind, propertyName); } static void compilePutPrivateNameWithCachedId(VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, CacheableIdentifier propertyName) { JIT jit(vm, codeBlock); jit.m_bytecodeIndex = byValInfo->bytecodeIndex; jit.privateCompilePutPrivateNameWithCachedId(byValInfo, returnAddress, propertyName); } static void compileHasIndexedProperty(VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode) { JIT jit(vm, codeBlock); jit.m_bytecodeIndex = byValInfo->bytecodeIndex; jit.privateCompileHasIndexedProperty(byValInfo, returnAddress, arrayMode); } static unsigned frameRegisterCountFor(CodeBlock*); static int stackPointerOffsetFor(CodeBlock*); JS_EXPORT_PRIVATE static HashMap compileTimeStats(); JS_EXPORT_PRIVATE static Seconds totalCompileTime(); private: void privateCompileMainPass(); void privateCompileLinkPass(); void privateCompileSlowCases(); CompilationResult privateCompile(JITCompilationEffort); void privateCompileGetByVal(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode); template void privateCompilePutByVal(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode); template void privateCompilePutByValWithCachedId(ByValInfo*, ReturnAddressPtr, PutKind, CacheableIdentifier); void privateCompilePutPrivateNameWithCachedId(ByValInfo*, ReturnAddressPtr, CacheableIdentifier); void privateCompileHasIndexedProperty(ByValInfo*, ReturnAddressPtr, JITArrayMode); void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress); // Add a call out from JIT code, without an exception check. Call appendCall(const FunctionPtr function) { Call functionCall = call(OperationPtrTag); m_farCalls.append(FarCallRecord(functionCall, m_bytecodeIndex, function.retagged())); return functionCall; } #if OS(WINDOWS) && CPU(X86_64) Call appendCallWithSlowPathReturnType(const FunctionPtr function) { Call functionCall = callWithSlowPathReturnType(OperationPtrTag); m_farCalls.append(FarCallRecord(functionCall, m_bytecodeIndex, function.retagged())); return functionCall; } #endif void exceptionCheck(Jump jumpToHandler) { m_exceptionChecks.append(jumpToHandler); } void exceptionCheck() { m_exceptionChecks.append(emitExceptionCheck(vm())); } void exceptionCheckWithCallFrameRollback() { m_exceptionChecksWithCallFrameRollback.append(emitExceptionCheck(vm())); } void privateCompileExceptionHandlers(); void advanceToNextCheckpoint(); void emitJumpSlowToHotForCheckpoint(Jump); void addSlowCase(Jump); void addSlowCase(const JumpList&); void addSlowCase(); void addJump(Jump, int); void addJump(const JumpList&, int); void emitJumpSlowToHot(Jump, int); template void compileOpCall(const Instruction*, unsigned callLinkInfoIndex); template void compileOpCallSlowCase(const Instruction*, Vector::iterator&, unsigned callLinkInfoIndex); template std::enable_if_t< Op::opcodeID != op_call_varargs && Op::opcodeID != op_construct_varargs && Op::opcodeID != op_tail_call_varargs && Op::opcodeID != op_tail_call_forward_arguments , void> compileSetupFrame(const Op&, CallLinkInfo*); template std::enable_if_t< Op::opcodeID == op_call_varargs || Op::opcodeID == op_construct_varargs || Op::opcodeID == op_tail_call_varargs || Op::opcodeID == op_tail_call_forward_arguments , void> compileSetupFrame(const Op&, CallLinkInfo*); template bool compileTailCall(const Op&, CallLinkInfo*, unsigned callLinkInfoIndex); template bool compileCallEval(const Op&); void compileCallEvalSlowCase(const Instruction*, Vector::iterator&); template void emitPutCallResult(const Op&); enum class CompileOpStrictEqType { StrictEq, NStrictEq }; template void compileOpStrictEq(const Instruction*, CompileOpStrictEqType); template void compileOpStrictEqJump(const Instruction*, CompileOpStrictEqType); enum class CompileOpEqType { Eq, NEq }; void compileOpEqJumpSlow(Vector::iterator&, CompileOpEqType, int jumpTarget); bool isOperandConstantDouble(VirtualRegister); enum WriteBarrierMode { UnconditionalWriteBarrier, ShouldFilterBase, ShouldFilterValue, ShouldFilterBaseAndValue }; // value register in write barrier is used before any scratch registers // so may safely be the same as either of the scratch registers. void emitWriteBarrier(VirtualRegister owner, WriteBarrierMode); void emitWriteBarrier(VirtualRegister owner, VirtualRegister value, WriteBarrierMode); void emitWriteBarrier(JSCell* owner, VirtualRegister value, WriteBarrierMode); void emitWriteBarrier(JSCell* owner); // This assumes that the value to profile is in regT0 and that regT3 is available for // scratch. #if USE(JSVALUE64) void emitValueProfilingSite(ValueProfile&, GPRReg); void emitValueProfilingSite(ValueProfile&, JSValueRegs); template void emitValueProfilingSite(Metadata&, GPRReg); template void emitValueProfilingSite(Metadata&, JSValueRegs); #else void emitValueProfilingSite(ValueProfile&, JSValueRegs); template void emitValueProfilingSite(Metadata&, JSValueRegs); #endif void emitValueProfilingSiteIfProfiledOpcode(...); template std::enable_if_t::value, void> emitValueProfilingSiteIfProfiledOpcode(Op bytecode); void emitArrayProfilingSiteWithCell(RegisterID cell, RegisterID indexingType, ArrayProfile*); void emitArrayProfileStoreToHoleSpecialCase(ArrayProfile*); void emitArrayProfileOutOfBoundsSpecialCase(ArrayProfile*); JITArrayMode chooseArrayMode(ArrayProfile*); // Property is in regT1, base is in regT0. regT2 contains indexing type. // Property is int-checked and zero extended. Base is cell checked. // Structure is already profiled. Returns the slow cases. Fall-through // case contains result in regT0, and it is not yet profiled. JumpList emitInt32Load(const Instruction* instruction, PatchableJump& badType) { return emitContiguousLoad(instruction, badType, Int32Shape); } JumpList emitDoubleLoad(const Instruction*, PatchableJump& badType); JumpList emitContiguousLoad(const Instruction*, PatchableJump& badType, IndexingType expectedShape = ContiguousShape); JumpList emitArrayStorageLoad(const Instruction*, PatchableJump& badType); JumpList emitLoadForArrayMode(const Instruction*, JITArrayMode, PatchableJump& badType); // Property is in regT1, base is in regT0. regT2 contains indecing type. // The value to store is not yet loaded. Property is int-checked and // zero-extended. Base is cell checked. Structure is already profiled. // returns the slow cases. template JumpList emitInt32PutByVal(Op bytecode, PatchableJump& badType) { return emitGenericContiguousPutByVal(bytecode, badType, Int32Shape); } template JumpList emitDoublePutByVal(Op bytecode, PatchableJump& badType) { return emitGenericContiguousPutByVal(bytecode, badType, DoubleShape); } template JumpList emitContiguousPutByVal(Op bytecode, PatchableJump& badType) { return emitGenericContiguousPutByVal(bytecode, badType); } template JumpList emitGenericContiguousPutByVal(Op, PatchableJump& badType, IndexingType indexingShape = ContiguousShape); template JumpList emitArrayStoragePutByVal(Op, PatchableJump& badType); template JumpList emitIntTypedArrayPutByVal(Op, PatchableJump& badType, TypedArrayType); template JumpList emitFloatTypedArrayPutByVal(Op, PatchableJump& badType, TypedArrayType); template ECMAMode ecmaMode(Op); // Determines the type of private field access for a bytecode. template PrivateFieldPutKind privateFieldPutKind(Op); // Identifier check helper for GetByVal and PutByVal. void emitByValIdentifierCheck(RegisterID cell, RegisterID scratch, CacheableIdentifier, JumpList& slowCases); JITPutByIdGenerator emitPutPrivateNameWithCachedId(OpPutPrivateName, CacheableIdentifier, JumpList& doneCases, JumpList& slowCases); template JITPutByIdGenerator emitPutByValWithCachedId(Op, PutKind, CacheableIdentifier, JumpList& doneCases, JumpList& slowCases); enum FinalObjectMode { MayBeFinal, KnownNotFinal }; void emitGetVirtualRegister(VirtualRegister src, JSValueRegs dst); void emitPutVirtualRegister(VirtualRegister dst, JSValueRegs src); int32_t getOperandConstantInt(VirtualRegister src); double getOperandConstantDouble(VirtualRegister src); #if USE(JSVALUE32_64) bool getOperandConstantInt(VirtualRegister op1, VirtualRegister op2, VirtualRegister& op, int32_t& constant); void emitLoadDouble(VirtualRegister, FPRegisterID value); void emitLoadTag(VirtualRegister, RegisterID tag); void emitLoadPayload(VirtualRegister, RegisterID payload); void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload); void emitLoad(VirtualRegister, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister); void emitLoad2(VirtualRegister, RegisterID tag1, RegisterID payload1, VirtualRegister, RegisterID tag2, RegisterID payload2); void emitStore(VirtualRegister, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister); void emitStore(VirtualRegister, const JSValue constant, RegisterID base = callFrameRegister); void emitStoreInt32(VirtualRegister, RegisterID payload, bool indexIsInt32 = false); void emitStoreInt32(VirtualRegister, TrustedImm32 payload, bool indexIsInt32 = false); void emitStoreCell(VirtualRegister, RegisterID payload, bool indexIsCell = false); void emitStoreBool(VirtualRegister, RegisterID payload, bool indexIsBool = false); void emitStoreDouble(VirtualRegister, FPRegisterID value); void emitJumpSlowCaseIfNotJSCell(VirtualRegister); void emitJumpSlowCaseIfNotJSCell(VirtualRegister, RegisterID tag); void emitJumpSlowCaseIfNotJSCell(RegisterID); void compileGetByIdHotPath(const Identifier*); // Arithmetic opcode helpers template void emitBinaryDoubleOp(const Instruction *, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true); #else // USE(JSVALUE32_64) void emitGetVirtualRegister(VirtualRegister src, RegisterID dst); void emitGetVirtualRegisters(VirtualRegister src1, RegisterID dst1, VirtualRegister src2, RegisterID dst2); void emitPutVirtualRegister(VirtualRegister dst, RegisterID from = regT0); void emitStoreCell(VirtualRegister dst, RegisterID payload, bool /* only used in JSValue32_64 */ = false) { emitPutVirtualRegister(dst, payload); } Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID); void emitJumpSlowCaseIfJSCell(RegisterID); void emitJumpSlowCaseIfNotJSCell(RegisterID); void emitJumpSlowCaseIfNotJSCell(RegisterID, VirtualRegister); Jump emitJumpIfNotInt(RegisterID, RegisterID, RegisterID scratch); PatchableJump emitPatchableJumpIfNotInt(RegisterID); void emitJumpSlowCaseIfNotInt(RegisterID); void emitJumpSlowCaseIfNotNumber(RegisterID); void emitJumpSlowCaseIfNotInt(RegisterID, RegisterID, RegisterID scratch); void compileGetByIdHotPath(VirtualRegister baseReg, const Identifier*); #endif // USE(JSVALUE32_64) template void emit_compareAndJump(const Instruction*, RelationalCondition); void emit_compareAndJumpImpl(VirtualRegister op1, VirtualRegister op2, unsigned target, RelationalCondition); template void emit_compareUnsigned(const Instruction*, RelationalCondition); void emit_compareUnsignedImpl(VirtualRegister dst, VirtualRegister op1, VirtualRegister op2, RelationalCondition); template void emit_compareUnsignedAndJump(const Instruction*, RelationalCondition); void emit_compareUnsignedAndJumpImpl(VirtualRegister op1, VirtualRegister op2, unsigned target, RelationalCondition); template void emit_compareAndJumpSlow(const Instruction*, DoubleCondition, SlowOperation, bool invert, Vector::iterator&); template void emit_compareAndJumpSlowImpl(VirtualRegister op1, VirtualRegister op2, unsigned target, size_t instructionSize, DoubleCondition, SlowOperation, bool invert, Vector::iterator&); void assertStackPointerOffset(); void emit_op_add(const Instruction*); void emit_op_bitand(const Instruction*); void emit_op_bitor(const Instruction*); void emit_op_bitxor(const Instruction*); void emit_op_bitnot(const Instruction*); void emit_op_call(const Instruction*); void emit_op_tail_call(const Instruction*); void emit_op_call_eval(const Instruction*); void emit_op_call_varargs(const Instruction*); void emit_op_tail_call_varargs(const Instruction*); void emit_op_tail_call_forward_arguments(const Instruction*); void emit_op_construct_varargs(const Instruction*); void emit_op_catch(const Instruction*); void emit_op_construct(const Instruction*); void emit_op_create_this(const Instruction*); void emit_op_to_this(const Instruction*); void emit_op_get_argument(const Instruction*); void emit_op_argument_count(const Instruction*); void emit_op_get_rest_length(const Instruction*); void emit_op_check_tdz(const Instruction*); void emit_op_identity_with_profile(const Instruction*); void emit_op_debug(const Instruction*); void emit_op_del_by_id(const Instruction*); void emitSlow_op_del_by_id(const Instruction*, Vector::iterator&); void emit_op_del_by_val(const Instruction*); void emitSlow_op_del_by_val(const Instruction*, Vector::iterator&); void emit_op_div(const Instruction*); void emit_op_end(const Instruction*); void emit_op_enter(const Instruction*); void emit_op_get_scope(const Instruction*); void emit_op_eq(const Instruction*); void emit_op_eq_null(const Instruction*); void emit_op_below(const Instruction*); void emit_op_beloweq(const Instruction*); void emit_op_try_get_by_id(const Instruction*); void emit_op_get_by_id(const Instruction*); void emit_op_get_by_id_with_this(const Instruction*); void emit_op_get_by_id_direct(const Instruction*); void emit_op_get_by_val(const Instruction*); void emit_op_get_private_name(const Instruction*); void emit_op_get_argument_by_val(const Instruction*); void emit_op_get_prototype_of(const Instruction*); void emit_op_in_by_id(const Instruction*); void emit_op_init_lazy_reg(const Instruction*); void emit_op_overrides_has_instance(const Instruction*); void emit_op_instanceof(const Instruction*); void emit_op_instanceof_custom(const Instruction*); void emit_op_is_empty(const Instruction*); void emit_op_typeof_is_undefined(const Instruction*); void emit_op_is_undefined_or_null(const Instruction*); void emit_op_is_boolean(const Instruction*); void emit_op_is_number(const Instruction*); #if USE(BIGINT32) void emit_op_is_big_int(const Instruction*); #else NO_RETURN void emit_op_is_big_int(const Instruction*); #endif void emit_op_is_object(const Instruction*); void emit_op_is_cell_with_type(const Instruction*); void emit_op_jeq_null(const Instruction*); void emit_op_jfalse(const Instruction*); void emit_op_jmp(const Instruction*); void emit_op_jneq_null(const Instruction*); void emit_op_jundefined_or_null(const Instruction*); void emit_op_jnundefined_or_null(const Instruction*); void emit_op_jneq_ptr(const Instruction*); void emit_op_jless(const Instruction*); void emit_op_jlesseq(const Instruction*); void emit_op_jgreater(const Instruction*); void emit_op_jgreatereq(const Instruction*); void emit_op_jnless(const Instruction*); void emit_op_jnlesseq(const Instruction*); void emit_op_jngreater(const Instruction*); void emit_op_jngreatereq(const Instruction*); void emit_op_jeq(const Instruction*); void emit_op_jneq(const Instruction*); void emit_op_jstricteq(const Instruction*); void emit_op_jnstricteq(const Instruction*); void emit_op_jbelow(const Instruction*); void emit_op_jbeloweq(const Instruction*); void emit_op_jtrue(const Instruction*); void emit_op_loop_hint(const Instruction*); void emit_op_check_traps(const Instruction*); void emit_op_nop(const Instruction*); void emit_op_super_sampler_begin(const Instruction*); void emit_op_super_sampler_end(const Instruction*); void emit_op_lshift(const Instruction*); void emit_op_mod(const Instruction*); void emit_op_mov(const Instruction*); void emit_op_mul(const Instruction*); void emit_op_negate(const Instruction*); void emit_op_neq(const Instruction*); void emit_op_neq_null(const Instruction*); void emit_op_new_array(const Instruction*); void emit_op_new_array_with_size(const Instruction*); void emit_op_new_func(const Instruction*); void emit_op_new_func_exp(const Instruction*); void emit_op_new_generator_func(const Instruction*); void emit_op_new_generator_func_exp(const Instruction*); void emit_op_new_async_func(const Instruction*); void emit_op_new_async_func_exp(const Instruction*); void emit_op_new_async_generator_func(const Instruction*); void emit_op_new_async_generator_func_exp(const Instruction*); void emit_op_new_object(const Instruction*); void emit_op_new_regexp(const Instruction*); void emit_op_not(const Instruction*); void emit_op_nstricteq(const Instruction*); void emit_op_dec(const Instruction*); void emit_op_inc(const Instruction*); void emit_op_profile_type(const Instruction*); void emit_op_profile_control_flow(const Instruction*); void emit_op_get_parent_scope(const Instruction*); void emit_op_put_by_id(const Instruction*); template void emit_op_put_by_val(const Instruction*); void emit_op_put_by_val_direct(const Instruction*); void emit_op_put_private_name(const Instruction*); void emit_op_put_getter_by_id(const Instruction*); void emit_op_put_setter_by_id(const Instruction*); void emit_op_put_getter_setter_by_id(const Instruction*); void emit_op_put_getter_by_val(const Instruction*); void emit_op_put_setter_by_val(const Instruction*); void emit_op_ret(const Instruction*); void emit_op_rshift(const Instruction*); void emit_op_set_function_name(const Instruction*); void emit_op_stricteq(const Instruction*); void emit_op_sub(const Instruction*); void emit_op_switch_char(const Instruction*); void emit_op_switch_imm(const Instruction*); void emit_op_switch_string(const Instruction*); void emit_op_tear_off_arguments(const Instruction*); void emit_op_throw(const Instruction*); void emit_op_to_number(const Instruction*); void emit_op_to_numeric(const Instruction*); void emit_op_to_string(const Instruction*); void emit_op_to_object(const Instruction*); void emit_op_to_primitive(const Instruction*); void emit_op_unexpected_load(const Instruction*); void emit_op_unsigned(const Instruction*); void emit_op_urshift(const Instruction*); template void emit_op_has_structure_propertyImpl(const Instruction*); void emit_op_has_enumerable_indexed_property(const Instruction*); void emit_op_has_enumerable_structure_property(const Instruction*); void emit_op_has_own_structure_property(const Instruction*); void emit_op_in_structure_property(const Instruction*); void emit_op_get_direct_pname(const Instruction*); void emit_op_enumerator_structure_pname(const Instruction*); void emit_op_enumerator_generic_pname(const Instruction*); void emit_op_get_internal_field(const Instruction*); void emit_op_put_internal_field(const Instruction*); void emit_op_log_shadow_chicken_prologue(const Instruction*); void emit_op_log_shadow_chicken_tail(const Instruction*); void emit_op_to_property_key(const Instruction*); void emitSlow_op_add(const Instruction*, Vector::iterator&); void emitSlow_op_call(const Instruction*, Vector::iterator&); void emitSlow_op_tail_call(const Instruction*, Vector::iterator&); void emitSlow_op_call_eval(const Instruction*, Vector::iterator&); void emitSlow_op_call_varargs(const Instruction*, Vector::iterator&); void emitSlow_op_tail_call_varargs(const Instruction*, Vector::iterator&); void emitSlow_op_tail_call_forward_arguments(const Instruction*, Vector::iterator&); void emitSlow_op_construct_varargs(const Instruction*, Vector::iterator&); void emitSlow_op_construct(const Instruction*, Vector::iterator&); void emitSlow_op_eq(const Instruction*, Vector::iterator&); void emitSlow_op_get_callee(const Instruction*, Vector::iterator&); void emitSlow_op_try_get_by_id(const Instruction*, Vector::iterator&); void emitSlow_op_get_by_id(const Instruction*, Vector::iterator&); void emitSlow_op_get_by_id_with_this(const Instruction*, Vector::iterator&); void emitSlow_op_get_by_id_direct(const Instruction*, Vector::iterator&); void emitSlow_op_get_by_val(const Instruction*, Vector::iterator&); void emitSlow_op_get_private_name(const Instruction*, Vector::iterator&); void emitSlow_op_get_argument_by_val(const Instruction*, Vector::iterator&); void emitSlow_op_in_by_id(const Instruction*, Vector::iterator&); void emitSlow_op_instanceof(const Instruction*, Vector::iterator&); void emitSlow_op_instanceof_custom(const Instruction*, Vector::iterator&); void emitSlow_op_jless(const Instruction*, Vector::iterator&); void emitSlow_op_jlesseq(const Instruction*, Vector::iterator&); void emitSlow_op_jgreater(const Instruction*, Vector::iterator&); void emitSlow_op_jgreatereq(const Instruction*, Vector::iterator&); void emitSlow_op_jnless(const Instruction*, Vector::iterator&); void emitSlow_op_jnlesseq(const Instruction*, Vector::iterator&); void emitSlow_op_jngreater(const Instruction*, Vector::iterator&); void emitSlow_op_jngreatereq(const Instruction*, Vector::iterator&); void emitSlow_op_jeq(const Instruction*, Vector::iterator&); void emitSlow_op_jneq(const Instruction*, Vector::iterator&); void emitSlow_op_jstricteq(const Instruction*, Vector::iterator&); void emitSlow_op_jnstricteq(const Instruction*, Vector::iterator&); void emitSlow_op_jtrue(const Instruction*, Vector::iterator&); void emitSlow_op_loop_hint(const Instruction*, Vector::iterator&); void emitSlow_op_check_traps(const Instruction*, Vector::iterator&); void emitSlow_op_mod(const Instruction*, Vector::iterator&); void emitSlow_op_mul(const Instruction*, Vector::iterator&); void emitSlow_op_negate(const Instruction*, Vector::iterator&); void emitSlow_op_neq(const Instruction*, Vector::iterator&); void emitSlow_op_new_object(const Instruction*, Vector::iterator&); void emitSlow_op_put_by_id(const Instruction*, Vector::iterator&); void emitSlow_op_put_by_val(const Instruction*, Vector::iterator&); void emitSlow_op_put_private_name(const Instruction*, Vector::iterator&); void emitSlow_op_sub(const Instruction*, Vector::iterator&); void emitSlow_op_has_enumerable_indexed_property(const Instruction*, Vector::iterator&); void emit_op_resolve_scope(const Instruction*); void emit_op_get_from_scope(const Instruction*); void emit_op_put_to_scope(const Instruction*); void emit_op_get_from_arguments(const Instruction*); void emit_op_put_to_arguments(const Instruction*); void emitSlow_op_get_from_scope(const Instruction*, Vector::iterator&); void emitSlow_op_put_to_scope(const Instruction*, Vector::iterator&); void emitSlowCaseCall(const Instruction*, Vector::iterator&, SlowPathFunction); void emit_op_iterator_open(const Instruction*); void emitSlow_op_iterator_open(const Instruction*, Vector::iterator&); void emit_op_iterator_next(const Instruction*); void emitSlow_op_iterator_next(const Instruction*, Vector::iterator&); void emitRightShift(const Instruction*, bool isUnsigned); void emitRightShiftSlowCase(const Instruction*, Vector::iterator&, bool isUnsigned); template void emitNewFuncCommon(const Instruction*); template void emitNewFuncExprCommon(const Instruction*); void emitVarInjectionCheck(bool needsVarInjectionChecks); void emitResolveClosure(VirtualRegister dst, VirtualRegister scope, bool needsVarInjectionChecks, unsigned depth); void emitLoadWithStructureCheck(VirtualRegister scope, Structure** structureSlot); #if USE(JSVALUE64) void emitGetVarFromPointer(JSValue* operand, GPRReg); void emitGetVarFromIndirectPointer(JSValue** operand, GPRReg); #else void emitGetVarFromIndirectPointer(JSValue** operand, GPRReg tag, GPRReg payload); void emitGetVarFromPointer(JSValue* operand, GPRReg tag, GPRReg payload); #endif void emitGetClosureVar(VirtualRegister scope, uintptr_t operand); void emitNotifyWrite(WatchpointSet*); void emitNotifyWrite(GPRReg pointerToSet); void emitPutGlobalVariable(JSValue* operand, VirtualRegister value, WatchpointSet*); void emitPutGlobalVariableIndirect(JSValue** addressOfOperand, VirtualRegister value, WatchpointSet**); void emitPutClosureVar(VirtualRegister scope, uintptr_t operand, VirtualRegister value, WatchpointSet*); void emitInitRegister(VirtualRegister); void emitPutIntToCallFrameHeader(RegisterID from, VirtualRegister); JSValue getConstantOperand(VirtualRegister); bool isOperandConstantInt(VirtualRegister); bool isOperandConstantChar(VirtualRegister); template void emitMathICFast(JITUnaryMathIC*, const Instruction*, ProfiledFunction, NonProfiledFunction); template void emitMathICFast(JITBinaryMathIC*, const Instruction*, ProfiledFunction, NonProfiledFunction); template void emitMathICSlow(JITBinaryMathIC*, const Instruction*, ProfiledRepatchFunction, ProfiledFunction, RepatchFunction); template void emitMathICSlow(JITUnaryMathIC*, const Instruction*, ProfiledRepatchFunction, ProfiledFunction, RepatchFunction); Jump getSlowCase(Vector::iterator& iter) { return iter++->from; } void linkSlowCase(Vector::iterator& iter) { if (iter->from.isSet()) iter->from.link(this); ++iter; } void linkDummySlowCase(Vector::iterator& iter) { ASSERT(!iter->from.isSet()); ++iter; } void linkSlowCaseIfNotJSCell(Vector::iterator&, VirtualRegister); void linkAllSlowCasesForBytecodeIndex(Vector& slowCases, Vector::iterator&, BytecodeIndex bytecodeOffset); void linkAllSlowCases(Vector::iterator& iter) { linkAllSlowCasesForBytecodeIndex(m_slowCases, iter, m_bytecodeIndex); } bool hasAnySlowCases(Vector& slowCases, Vector::iterator&, BytecodeIndex bytecodeOffset); bool hasAnySlowCases(Vector::iterator& iter) { return hasAnySlowCases(m_slowCases, iter, m_bytecodeIndex); } MacroAssembler::Call appendCallWithExceptionCheck(const FunctionPtr); #if OS(WINDOWS) && CPU(X86_64) MacroAssembler::Call appendCallWithExceptionCheckAndSlowPathReturnType(const FunctionPtr); #endif MacroAssembler::Call appendCallWithCallFrameRollbackOnException(const FunctionPtr); MacroAssembler::Call appendCallWithExceptionCheckSetJSValueResult(const FunctionPtr, VirtualRegister result); template MacroAssembler::Call appendCallWithExceptionCheckSetJSValueResultWithProfile(Metadata&, const FunctionPtr, VirtualRegister result); template std::enable_if_t::hasResult, MacroAssembler::Call> callOperation(OperationType operation, VirtualRegister result, Args... args) { setupArguments(args...); return appendCallWithExceptionCheckSetJSValueResult(operation, result); } #if OS(WINDOWS) && CPU(X86_64) template std::enable_if_t::ResultType, SlowPathReturnType>::value, MacroAssembler::Call> callOperation(OperationType operation, Args... args) { setupArguments(args...); return appendCallWithExceptionCheckAndSlowPathReturnType(operation); } template struct is64BitType { static constexpr bool value = sizeof(Type) <= 8; }; template<> struct is64BitType { static constexpr bool value = true; }; template std::enable_if_t::ResultType, SlowPathReturnType>::value, MacroAssembler::Call> callOperation(OperationType operation, Args... args) { static_assert(is64BitType::ResultType>::value, "Win64 cannot use standard call when return type is larger than 64 bits."); setupArguments(args...); return appendCallWithExceptionCheck(operation); } #else // OS(WINDOWS) && CPU(X86_64) template MacroAssembler::Call callOperation(OperationType operation, Args... args) { setupArguments(args...); return appendCallWithExceptionCheck(operation); } #endif // OS(WINDOWS) && CPU(X86_64) template std::enable_if_t::hasResult, MacroAssembler::Call> callOperationWithProfile(Metadata& metadata, OperationType operation, VirtualRegister result, Args... args) { setupArguments(args...); return appendCallWithExceptionCheckSetJSValueResultWithProfile(metadata, operation, result); } template MacroAssembler::Call callOperationWithResult(OperationType operation, JSValueRegs resultRegs, Args... args) { setupArguments(args...); auto result = appendCallWithExceptionCheck(operation); setupResults(resultRegs); return result; } template MacroAssembler::Call callOperationNoExceptionCheck(OperationType operation, Args... args) { setupArguments(args...); updateTopCallFrame(); return appendCall(operation); } template MacroAssembler::Call callOperationWithCallFrameRollbackOnException(OperationType operation, Args... args) { setupArguments(args...); return appendCallWithCallFrameRollbackOnException(operation); } enum class ProfilingPolicy { ShouldEmitProfiling, NoProfiling }; template void emitBitBinaryOpFastPath(const Instruction* currentInstruction, ProfilingPolicy shouldEmitProfiling = ProfilingPolicy::NoProfiling); void emitRightShiftFastPath(const Instruction* currentInstruction, OpcodeID); template void emitRightShiftFastPath(const Instruction* currentInstruction, JITRightShiftGenerator::ShiftType); void updateTopCallFrame(); Call emitNakedNearCall(CodePtr function = CodePtr()); Call emitNakedNearTailCall(CodePtr function = CodePtr()); // Loads the character value of a single character string into dst. void emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures); int jumpTarget(const Instruction*, int target); #if ENABLE(DFG_JIT) void emitEnterOptimizationCheck(); #else void emitEnterOptimizationCheck() { } #endif #ifndef NDEBUG void printBytecodeOperandTypes(VirtualRegister src1, VirtualRegister src2); #endif #if ENABLE(SAMPLING_FLAGS) void setSamplingFlag(int32_t); void clearSamplingFlag(int32_t); #endif #if ENABLE(SAMPLING_COUNTERS) void emitCount(AbstractSamplingCounter&, int32_t = 1); #endif #if ENABLE(OPCODE_SAMPLING) void sampleInstruction(const Instruction*, bool = false); #endif #if ENABLE(CODEBLOCK_SAMPLING) void sampleCodeBlock(CodeBlock*); #else void sampleCodeBlock(CodeBlock*) {} #endif #if ENABLE(DFG_JIT) bool canBeOptimized() { return m_canBeOptimized; } bool canBeOptimizedOrInlined() { return m_canBeOptimizedOrInlined; } bool shouldEmitProfiling() { return m_shouldEmitProfiling; } #else bool canBeOptimized() { return false; } bool canBeOptimizedOrInlined() { return false; } // Enables use of value profiler with tiered compilation turned off, // in which case all code gets profiled. bool shouldEmitProfiling() { return false; } #endif static bool reportCompileTimes(); static bool computeCompileTimes(); // If you need to check a value from the metadata table and you need it to // be consistent across the fast and slow path, then you want to use this. // It will give the slow path the same value read by the fast path. GetPutInfo copiedGetPutInfo(OpPutToScope); template BinaryArithProfile copiedArithProfile(BinaryOp); Interpreter* m_interpreter; Vector m_farCalls; Vector m_nearCalls; Vector