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/*
* 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<int>(expected), static_cast<int>(actual));
#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 CallRecord {
MacroAssembler::Call from;
BytecodeIndex bytecodeIndex;
FunctionPtr<OperationPtrTag> callee;
CallRecord()
{
}
CallRecord(MacroAssembler::Call from, BytecodeIndex bytecodeIndex, FunctionPtr<OperationPtrTag> callee)
: from(from)
, bytecodeIndex(bytecodeIndex)
, callee(callee)
{
}
};
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)
{
}
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<CFunctionPtrTag> 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 compileGetByVal(const ConcurrentJSLocker& locker, VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeIndex = byValInfo->bytecodeIndex;
jit.privateCompileGetByVal(locker, byValInfo, returnAddress, arrayMode);
}
static void compileGetByValWithCachedId(VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, const Identifier& propertyName)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeIndex = byValInfo->bytecodeIndex;
jit.privateCompileGetByValWithCachedId(byValInfo, returnAddress, propertyName);
}
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<OpPutByVal>(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<OpPutByValDirect>(locker, byValInfo, returnAddress, arrayMode);
}
template<typename Op>
static void compilePutByValWithCachedId(VM& vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, PutKind putKind, const Identifier& propertyName)
{
JIT jit(vm, codeBlock);
jit.m_bytecodeIndex = byValInfo->bytecodeIndex;
jit.privateCompilePutByValWithCachedId<Op>(byValInfo, returnAddress, putKind, 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<CString, Seconds> compileTimeStats();
JS_EXPORT_PRIVATE static Seconds totalCompileTime();
private:
void privateCompileMainPass();
void privateCompileLinkPass();
void privateCompileSlowCases();
CompilationResult privateCompile(JITCompilationEffort);
void privateCompileGetByVal(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode);
void privateCompileGetByValWithCachedId(ByValInfo*, ReturnAddressPtr, const Identifier&);
template<typename Op>
void privateCompilePutByVal(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode);
template<typename Op>
void privateCompilePutByValWithCachedId(ByValInfo*, ReturnAddressPtr, PutKind, const Identifier&);
void privateCompileHasIndexedProperty(ByValInfo*, ReturnAddressPtr, JITArrayMode);
void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
// Add a call out from JIT code, without an exception check.
Call appendCall(const FunctionPtr<CFunctionPtrTag> function)
{
Call functionCall = call(OperationPtrTag);
m_calls.append(CallRecord(functionCall, m_bytecodeIndex, function.retagged<OperationPtrTag>()));
return functionCall;
}
#if OS(WINDOWS) && CPU(X86_64)
Call appendCallWithSlowPathReturnType(const FunctionPtr<CFunctionPtrTag> function)
{
Call functionCall = callWithSlowPathReturnType(OperationPtrTag);
m_calls.append(CallRecord(functionCall, m_bytecodeIndex, function.retagged<OperationPtrTag>()));
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 addSlowCase(Jump);
void addSlowCase(const JumpList&);
void addSlowCase();
void addJump(Jump, int);
void addJump(const JumpList&, int);
void emitJumpSlowToHot(Jump, int);
template<typename Op>
void compileOpCall(const Instruction*, unsigned callLinkInfoIndex);
template<typename Op>
void compileOpCallSlowCase(const Instruction*, Vector<SlowCaseEntry>::iterator&, unsigned callLinkInfoIndex);
template<typename Op>
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<typename Op>
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<typename Op>
bool compileTailCall(const Op&, CallLinkInfo*, unsigned callLinkInfoIndex);
template<typename Op>
bool compileCallEval(const Op&);
void compileCallEvalSlowCase(const Instruction*, Vector<SlowCaseEntry>::iterator&);
template<typename Op>
void emitPutCallResult(const Op&);
enum class CompileOpStrictEqType { StrictEq, NStrictEq };
template<typename Op>
void compileOpStrictEq(const Instruction*, CompileOpStrictEqType);
template<typename Op>
void compileOpStrictEqJump(const Instruction*, CompileOpStrictEqType);
enum class CompileOpEqType { Eq, NEq };
void compileOpEqJumpSlow(Vector<SlowCaseEntry>::iterator&, CompileOpEqType, int jumpTarget);
bool isOperandConstantDouble(int src);
void emitLoadDouble(int index, FPRegisterID value);
void emitLoadInt32ToDouble(int index, FPRegisterID value);
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(unsigned owner, unsigned value, WriteBarrierMode);
void emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode);
void emitWriteBarrier(JSCell* owner);
// This assumes that the value to profile is in regT0 and that regT3 is available for
// scratch.
void emitValueProfilingSite(ValueProfile&);
template<typename Metadata> void emitValueProfilingSite(Metadata&);
void emitValueProfilingSiteIfProfiledOpcode(...);
template<typename Op>
std::enable_if_t<std::is_same<decltype(Op::Metadata::m_profile), ValueProfile>::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);
JumpList emitInt32GetByVal(const Instruction* instruction, PatchableJump& badType) { return emitContiguousGetByVal(instruction, badType, Int32Shape); }
JumpList emitDoubleGetByVal(const Instruction*, PatchableJump& badType);
JumpList emitContiguousGetByVal(const Instruction*, PatchableJump& badType, IndexingType expectedShape = ContiguousShape);
JumpList emitArrayStorageGetByVal(const Instruction*, PatchableJump& badType);
JumpList emitDirectArgumentsGetByVal(const Instruction*, PatchableJump& badType);
JumpList emitScopedArgumentsGetByVal(const Instruction*, PatchableJump& badType);
JumpList emitIntTypedArrayGetByVal(const Instruction*, PatchableJump& badType, TypedArrayType);
JumpList emitFloatTypedArrayGetByVal(const Instruction*, PatchableJump& badType, TypedArrayType);
// 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<typename Op>
JumpList emitInt32PutByVal(Op bytecode, PatchableJump& badType)
{
return emitGenericContiguousPutByVal(bytecode, badType, Int32Shape);
}
template<typename Op>
JumpList emitDoublePutByVal(Op bytecode, PatchableJump& badType)
{
return emitGenericContiguousPutByVal(bytecode, badType, DoubleShape);
}
template<typename Op>
JumpList emitContiguousPutByVal(Op bytecode, PatchableJump& badType)
{
return emitGenericContiguousPutByVal(bytecode, badType);
}
template<typename Op>
JumpList emitGenericContiguousPutByVal(Op, PatchableJump& badType, IndexingType indexingShape = ContiguousShape);
template<typename Op>
JumpList emitArrayStoragePutByVal(Op, PatchableJump& badType);
template<typename Op>
JumpList emitIntTypedArrayPutByVal(Op, PatchableJump& badType, TypedArrayType);
template<typename Op>
JumpList emitFloatTypedArrayPutByVal(Op, PatchableJump& badType, TypedArrayType);
// Identifier check helper for GetByVal and PutByVal.
void emitByValIdentifierCheck(ByValInfo*, RegisterID cell, RegisterID scratch, const Identifier&, JumpList& slowCases);
JITGetByIdGenerator emitGetByValWithCachedId(ByValInfo*, OpGetByVal, const Identifier&, Jump& fastDoneCase, Jump& slowDoneCase, JumpList& slowCases);
template<typename Op>
JITPutByIdGenerator emitPutByValWithCachedId(ByValInfo*, Op, PutKind, const Identifier&, JumpList& doneCases, JumpList& slowCases);
enum FinalObjectMode { MayBeFinal, KnownNotFinal };
void emitGetVirtualRegister(int src, JSValueRegs dst);
void emitPutVirtualRegister(int dst, JSValueRegs src);
int32_t getOperandConstantInt(int src);
double getOperandConstantDouble(int src);
#if USE(JSVALUE32_64)
bool getOperandConstantInt(int op1, int op2, int& op, int32_t& constant);
void emitLoadTag(int index, RegisterID tag);
void emitLoadPayload(int index, RegisterID payload);
void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload);
void emitLoad(int index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
void emitLoad2(int index1, RegisterID tag1, RegisterID payload1, int index2, RegisterID tag2, RegisterID payload2);
void emitStore(int index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
void emitStore(int index, const JSValue constant, RegisterID base = callFrameRegister);
void emitStoreInt32(int index, RegisterID payload, bool indexIsInt32 = false);
void emitStoreInt32(int index, TrustedImm32 payload, bool indexIsInt32 = false);
void emitStoreCell(int index, RegisterID payload, bool indexIsCell = false);
void emitStoreBool(int index, RegisterID payload, bool indexIsBool = false);
void emitStoreDouble(int index, FPRegisterID value);
void emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex);
void emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex, RegisterID tag);
void compileGetByIdHotPath(const Identifier*);
// Arithmetic opcode helpers
template <typename Op>
void emitBinaryDoubleOp(const Instruction *, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
#else // USE(JSVALUE32_64)
void emitGetVirtualRegister(int src, RegisterID dst);
void emitGetVirtualRegister(VirtualRegister src, RegisterID dst);
void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
void emitGetVirtualRegisters(VirtualRegister src1, RegisterID dst1, VirtualRegister src2, RegisterID dst2);
void emitPutVirtualRegister(int dst, RegisterID from = regT0);
void emitPutVirtualRegister(VirtualRegister dst, RegisterID from = regT0);
void emitStoreCell(int dst, RegisterID payload, bool /* only used in JSValue32_64 */ = false)
{
emitPutVirtualRegister(dst, payload);
}
void emitStoreCell(VirtualRegister dst, RegisterID payload)
{
emitPutVirtualRegister(dst, payload);
}
Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID);
void emitJumpSlowCaseIfJSCell(RegisterID);
void emitJumpSlowCaseIfNotJSCell(RegisterID);
void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);
Jump emitJumpIfNotInt(RegisterID, RegisterID, RegisterID scratch);
PatchableJump emitPatchableJumpIfNotInt(RegisterID);
void emitJumpSlowCaseIfNotInt(RegisterID);
void emitJumpSlowCaseIfNotNumber(RegisterID);
void emitJumpSlowCaseIfNotInt(RegisterID, RegisterID, RegisterID scratch);
void compileGetByIdHotPath(int baseVReg, const Identifier*);
#endif // USE(JSVALUE32_64)
template<typename Op>
void emit_compareAndJump(const Instruction*, RelationalCondition);
template<typename Op>
void emit_compareUnsigned(const Instruction*, RelationalCondition);
template<typename Op>
void emit_compareUnsignedAndJump(const Instruction*, RelationalCondition);
template<typename Op>
void emit_compareAndJumpSlow(const Instruction*, DoubleCondition, size_t (JIT_OPERATION *operation)(JSGlobalObject*, EncodedJSValue, EncodedJSValue), bool invert, Vector<SlowCaseEntry>::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 emit_op_del_by_val(const Instruction*);
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_argument_by_val(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_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*);
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<typename Op = OpPutByVal>
void emit_op_put_by_val(const Instruction*);
void emit_op_put_by_val_direct(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_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*);
void emit_op_has_structure_property(const Instruction*);
void emit_op_has_indexed_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 emitSlow_op_add(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_call(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_tail_call(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_call_eval(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_call_varargs(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_tail_call_varargs(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_tail_call_forward_arguments(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_construct_varargs(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_construct(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_eq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_callee(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_try_get_by_id(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_id(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_id_with_this(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_id_direct(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_by_val(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_get_argument_by_val(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_in_by_id(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_instanceof(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_instanceof_custom(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jless(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jlesseq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jgreater(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jgreatereq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jnless(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jnlesseq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jngreater(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jngreatereq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jeq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jneq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jstricteq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jnstricteq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_jtrue(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_loop_hint(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_check_traps(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_mod(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_mul(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_negate(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_neq(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_new_object(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_put_by_id(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_put_by_val(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_sub(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_has_indexed_property(const Instruction*, Vector<SlowCaseEntry>::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<SlowCaseEntry>::iterator&);
void emitSlow_op_put_to_scope(const Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlowCaseCall(const Instruction*, Vector<SlowCaseEntry>::iterator&, SlowPathFunction);
void emitRightShift(const Instruction*, bool isUnsigned);
void emitRightShiftSlowCase(const Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
template<typename Op>
void emitNewFuncCommon(const Instruction*);
template<typename Op>
void emitNewFuncExprCommon(const Instruction*);
void emitVarInjectionCheck(bool needsVarInjectionChecks);
void emitResolveClosure(int dst, int scope, bool needsVarInjectionChecks, unsigned depth);
void emitLoadWithStructureCheck(int 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(int scope, uintptr_t operand);
void emitNotifyWrite(WatchpointSet*);
void emitNotifyWrite(GPRReg pointerToSet);
void emitPutGlobalVariable(JSValue* operand, int value, WatchpointSet*);
void emitPutGlobalVariableIndirect(JSValue** addressOfOperand, int value, WatchpointSet**);
void emitPutClosureVar(int scope, uintptr_t operand, int value, WatchpointSet*);
void emitInitRegister(int dst);
void emitPutIntToCallFrameHeader(RegisterID from, int entry);
JSValue getConstantOperand(int src);
bool isOperandConstantInt(int src);
bool isOperandConstantChar(int src);
template <typename Op, typename Generator, typename ProfiledFunction, typename NonProfiledFunction>
void emitMathICFast(JITUnaryMathIC<Generator>*, const Instruction*, ProfiledFunction, NonProfiledFunction);
template <typename Op, typename Generator, typename ProfiledFunction, typename NonProfiledFunction>
void emitMathICFast(JITBinaryMathIC<Generator>*, const Instruction*, ProfiledFunction, NonProfiledFunction);
template <typename Op, typename Generator, typename ProfiledRepatchFunction, typename ProfiledFunction, typename RepatchFunction>
void emitMathICSlow(JITBinaryMathIC<Generator>*, const Instruction*, ProfiledRepatchFunction, ProfiledFunction, RepatchFunction);
template <typename Op, typename Generator, typename ProfiledRepatchFunction, typename ProfiledFunction, typename RepatchFunction>
void emitMathICSlow(JITUnaryMathIC<Generator>*, const Instruction*, ProfiledRepatchFunction, ProfiledFunction, RepatchFunction);
Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
return iter++->from;
}
void linkSlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
if (iter->from.isSet())
iter->from.link(this);
++iter;
}
void linkDummySlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(!iter->from.isSet());
++iter;
}
void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int virtualRegisterIndex);
void linkAllSlowCasesForBytecodeIndex(Vector<SlowCaseEntry>& slowCases,
Vector<SlowCaseEntry>::iterator&, BytecodeIndex bytecodeOffset);
void linkAllSlowCases(Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCasesForBytecodeIndex(m_slowCases, iter, m_bytecodeIndex);
}
MacroAssembler::Call appendCallWithExceptionCheck(const FunctionPtr<CFunctionPtrTag>);
#if OS(WINDOWS) && CPU(X86_64)
MacroAssembler::Call appendCallWithExceptionCheckAndSlowPathReturnType(const FunctionPtr<CFunctionPtrTag>);
#endif
MacroAssembler::Call appendCallWithCallFrameRollbackOnException(const FunctionPtr<CFunctionPtrTag>);
MacroAssembler::Call appendCallWithExceptionCheckSetJSValueResult(const FunctionPtr<CFunctionPtrTag>, int);
template<typename Metadata>
MacroAssembler::Call appendCallWithExceptionCheckSetJSValueResultWithProfile(Metadata&, const FunctionPtr<CFunctionPtrTag>, int);
template<typename OperationType, typename... Args>
std::enable_if_t<FunctionTraits<OperationType>::hasResult, MacroAssembler::Call>
callOperation(OperationType operation, int result, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheckSetJSValueResult(operation, result);
}
#if OS(WINDOWS) && CPU(X86_64)
template<typename OperationType, typename... Args>
std::enable_if_t<std::is_same<typename FunctionTraits<OperationType>::ResultType, SlowPathReturnType>::value, MacroAssembler::Call>
callOperation(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheckAndSlowPathReturnType(operation);
}
template<typename Type>
struct is64BitType {
static constexpr bool value = sizeof(Type) <= 8;
};
template<>
struct is64BitType<void> {
static constexpr bool value = true;
};
template<typename OperationType, typename... Args>
std::enable_if_t<!std::is_same<typename FunctionTraits<OperationType>::ResultType, SlowPathReturnType>::value, MacroAssembler::Call>
callOperation(OperationType operation, Args... args)
{
static_assert(is64BitType<typename FunctionTraits<OperationType>::ResultType>::value, "Win64 cannot use standard call when return type is larger than 64 bits.");
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheck(operation);
}
#else // OS(WINDOWS) && CPU(X86_64)
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperation(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheck(operation);
}
#endif // OS(WINDOWS) && CPU(X86_64)
template<typename Metadata, typename OperationType, typename... Args>
std::enable_if_t<FunctionTraits<OperationType>::hasResult, MacroAssembler::Call>
callOperationWithProfile(Metadata& metadata, OperationType operation, int result, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithExceptionCheckSetJSValueResultWithProfile(metadata, operation, result);
}
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperationWithResult(OperationType operation, JSValueRegs resultRegs, Args... args)
{
setupArguments<OperationType>(args...);
auto result = appendCallWithExceptionCheck(operation);
setupResults(resultRegs);
return result;
}
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperationNoExceptionCheck(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
updateTopCallFrame();
return appendCall(operation);
}
template<typename OperationType, typename... Args>
MacroAssembler::Call callOperationWithCallFrameRollbackOnException(OperationType operation, Args... args)
{
setupArguments<OperationType>(args...);
return appendCallWithCallFrameRollbackOnException(operation);
}
enum class ProfilingPolicy {
ShouldEmitProfiling,
NoProfiling
};
template<typename Op, typename SnippetGenerator>
void emitBitBinaryOpFastPath(const Instruction* currentInstruction, ProfilingPolicy shouldEmitProfiling = ProfilingPolicy::NoProfiling);
void emitRightShiftFastPath(const Instruction* currentInstruction, OpcodeID);
template<typename Op>
void emitRightShiftFastPath(const Instruction* currentInstruction, JITRightShiftGenerator::ShiftType);
void updateTopCallFrame();
Call emitNakedCall(CodePtr<NoPtrTag> function = CodePtr<NoPtrTag>());
Call emitNakedTailCall(CodePtr<NoPtrTag> function = CodePtr<NoPtrTag>());
// 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(int src1, int 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<typename BinaryOp>
BinaryArithProfile copiedArithProfile(BinaryOp);
Interpreter* m_interpreter;
Vector<CallRecord> m_calls;
Vector<Label> m_labels;
Vector<JITGetByIdGenerator> m_getByIds;
Vector<JITGetByIdWithThisGenerator> m_getByIdsWithThis;
Vector<JITPutByIdGenerator> m_putByIds;
Vector<JITInByIdGenerator> m_inByIds;
Vector<JITInstanceOfGenerator> m_instanceOfs;
Vector<ByValCompilationInfo> m_byValCompilationInfo;
Vector<CallCompilationInfo> m_callCompilationInfo;
Vector<JumpTable> m_jmpTable;
BytecodeIndex m_bytecodeIndex;
Vector<SlowCaseEntry> m_slowCases;
Vector<SwitchRecord> m_switches;
HashMap<unsigned, unsigned> m_copiedGetPutInfos;
HashMap<uint64_t, BinaryArithProfile> m_copiedArithProfiles;
JumpList m_exceptionChecks;
JumpList m_exceptionChecksWithCallFrameRollback;
Label m_exceptionHandler;
unsigned m_getByIdIndex { UINT_MAX };
unsigned m_getByIdWithThisIndex { UINT_MAX };
unsigned m_putByIdIndex { UINT_MAX };
unsigned m_inByIdIndex { UINT_MAX };
unsigned m_instanceOfIndex { UINT_MAX };
unsigned m_byValInstructionIndex { UINT_MAX };
unsigned m_callLinkInfoIndex { UINT_MAX };
Label m_arityCheck;
std::unique_ptr<LinkBuffer> m_linkBuffer;
std::unique_ptr<JITDisassembler> m_disassembler;
RefPtr<Profiler::Compilation> m_compilation;
PCToCodeOriginMapBuilder m_pcToCodeOriginMapBuilder;
HashMap<const Instruction*, void*> m_instructionToMathIC;
HashMap<const Instruction*, MathICGenerationState> m_instructionToMathICGenerationState;
bool m_canBeOptimized;
bool m_canBeOptimizedOrInlined;
bool m_shouldEmitProfiling;
BytecodeIndex m_loopOSREntryBytecodeIndex;
};
} // namespace JSC
#endif // ENABLE(JIT)