| /* |
| * Copyright (C) 2008, 2009, 2012, 2013 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(JIT) |
| #include "JIT.h" |
| |
| // This probably does not belong here; adding here for now as a quick Windows build fix. |
| #if ENABLE(ASSEMBLER) && CPU(X86) && !OS(MAC_OS_X) |
| #include "MacroAssembler.h" |
| JSC::MacroAssemblerX86Common::SSE2CheckState JSC::MacroAssemblerX86Common::s_sse2CheckState = NotCheckedSSE2; |
| #endif |
| |
| #include "CodeBlock.h" |
| #include "DFGCapabilities.h" |
| #include "Interpreter.h" |
| #include "JITInlines.h" |
| #include "JITOperations.h" |
| #include "JSArray.h" |
| #include "JSFunction.h" |
| #include "LinkBuffer.h" |
| #include "Operations.h" |
| #include "RepatchBuffer.h" |
| #include "ResultType.h" |
| #include "SamplingTool.h" |
| #include "SlowPathCall.h" |
| #include <wtf/CryptographicallyRandomNumber.h> |
| |
| using namespace std; |
| |
| namespace JSC { |
| |
| void ctiPatchNearCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction) |
| { |
| RepatchBuffer repatchBuffer(codeblock); |
| repatchBuffer.relinkNearCallerToTrampoline(returnAddress, newCalleeFunction); |
| } |
| |
| void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction) |
| { |
| RepatchBuffer repatchBuffer(codeblock); |
| repatchBuffer.relinkCallerToTrampoline(returnAddress, newCalleeFunction); |
| } |
| |
| void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, FunctionPtr newCalleeFunction) |
| { |
| RepatchBuffer repatchBuffer(codeblock); |
| repatchBuffer.relinkCallerToFunction(returnAddress, newCalleeFunction); |
| } |
| |
| JIT::JIT(VM* vm, CodeBlock* codeBlock) |
| : JSInterfaceJIT(vm, codeBlock) |
| , m_interpreter(vm->interpreter) |
| , m_labels(codeBlock ? codeBlock->numberOfInstructions() : 0) |
| , m_bytecodeOffset((unsigned)-1) |
| , m_propertyAccessInstructionIndex(UINT_MAX) |
| , m_byValInstructionIndex(UINT_MAX) |
| , m_callLinkInfoIndex(UINT_MAX) |
| #if USE(JSVALUE32_64) |
| , m_jumpTargetIndex(0) |
| , m_mappedBytecodeOffset((unsigned)-1) |
| , m_mappedVirtualRegisterIndex(JSStack::ReturnPC) |
| , m_mappedTag((RegisterID)-1) |
| , m_mappedPayload((RegisterID)-1) |
| #else |
| , m_lastResultBytecodeRegister(std::numeric_limits<int>::max()) |
| , m_jumpTargetsPosition(0) |
| #endif |
| , m_randomGenerator(cryptographicallyRandomNumber()) |
| #if ENABLE(VALUE_PROFILER) |
| , m_canBeOptimized(false) |
| , m_shouldEmitProfiling(false) |
| #endif |
| { |
| } |
| |
| #if ENABLE(DFG_JIT) |
| void JIT::emitEnterOptimizationCheck() |
| { |
| if (!canBeOptimized()) |
| return; |
| |
| JumpList skipOptimize; |
| |
| skipOptimize.append(branchAdd32(Signed, TrustedImm32(Options::executionCounterIncrementForEntry()), AbsoluteAddress(m_codeBlock->addressOfJITExecuteCounter()))); |
| ASSERT(!m_bytecodeOffset); |
| callOperation(operationOptimize, m_bytecodeOffset); |
| skipOptimize.append(branchTestPtr(Zero, returnValueRegister)); |
| jump(returnValueRegister); |
| skipOptimize.link(this); |
| } |
| #endif |
| |
| #define NEXT_OPCODE(name) \ |
| m_bytecodeOffset += OPCODE_LENGTH(name); \ |
| break; |
| |
| #if USE(JSVALUE32_64) |
| #define DEFINE_BINARY_OP(name) \ |
| case op_##name: { \ |
| JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_##name); \ |
| slowPathCall.call(); \ |
| NEXT_OPCODE(op_##name); \ |
| } |
| |
| #define DEFINE_UNARY_OP(name) \ |
| case op_##name: { \ |
| JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_##name); \ |
| slowPathCall.call(); \ |
| NEXT_OPCODE(op_##name); \ |
| } |
| |
| #else // USE(JSVALUE32_64) |
| |
| #define DEFINE_BINARY_OP(name) \ |
| case op_##name: { \ |
| JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_##name); \ |
| slowPathCall.call(); \ |
| NEXT_OPCODE(op_##name); \ |
| } |
| |
| #define DEFINE_UNARY_OP(name) \ |
| case op_##name: { \ |
| JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_##name); \ |
| slowPathCall.call(); \ |
| NEXT_OPCODE(op_##name); \ |
| } |
| #endif // USE(JSVALUE32_64) |
| |
| #define DEFINE_OP(name) \ |
| case name: { \ |
| emit_##name(currentInstruction); \ |
| NEXT_OPCODE(name); \ |
| } |
| |
| #define DEFINE_SLOWCASE_OP(name) \ |
| case name: { \ |
| emitSlow_##name(currentInstruction, iter); \ |
| NEXT_OPCODE(name); \ |
| } |
| |
| void JIT::privateCompileMainPass() |
| { |
| Instruction* instructionsBegin = m_codeBlock->instructions().begin(); |
| unsigned instructionCount = m_codeBlock->instructions().size(); |
| |
| m_callLinkInfoIndex = 0; |
| |
| for (m_bytecodeOffset = 0; m_bytecodeOffset < instructionCount; ) { |
| if (m_disassembler) |
| m_disassembler->setForBytecodeMainPath(m_bytecodeOffset, label()); |
| Instruction* currentInstruction = instructionsBegin + m_bytecodeOffset; |
| ASSERT_WITH_MESSAGE(m_interpreter->isOpcode(currentInstruction->u.opcode), "privateCompileMainPass gone bad @ %d", m_bytecodeOffset); |
| |
| #if ENABLE(OPCODE_SAMPLING) |
| if (m_bytecodeOffset > 0) // Avoid the overhead of sampling op_enter twice. |
| sampleInstruction(currentInstruction); |
| #endif |
| |
| #if USE(JSVALUE64) |
| if (atJumpTarget()) |
| killLastResultRegister(); |
| #endif |
| |
| m_labels[m_bytecodeOffset] = label(); |
| |
| #if ENABLE(JIT_VERBOSE) |
| dataLogF("Old JIT emitting code for bc#%u at offset 0x%lx.\n", m_bytecodeOffset, (long)debugOffset()); |
| #endif |
| |
| OpcodeID opcodeID = m_interpreter->getOpcodeID(currentInstruction->u.opcode); |
| |
| if (m_compilation) { |
| add64( |
| TrustedImm32(1), |
| AbsoluteAddress(m_compilation->executionCounterFor(Profiler::OriginStack(Profiler::Origin( |
| m_compilation->bytecodes(), m_bytecodeOffset)))->address())); |
| } |
| |
| switch (opcodeID) { |
| DEFINE_BINARY_OP(del_by_val) |
| DEFINE_BINARY_OP(in) |
| DEFINE_BINARY_OP(less) |
| DEFINE_BINARY_OP(lesseq) |
| DEFINE_BINARY_OP(greater) |
| DEFINE_BINARY_OP(greatereq) |
| DEFINE_UNARY_OP(is_function) |
| DEFINE_UNARY_OP(is_object) |
| DEFINE_UNARY_OP(typeof) |
| |
| DEFINE_OP(op_add) |
| DEFINE_OP(op_bitand) |
| DEFINE_OP(op_bitor) |
| DEFINE_OP(op_bitxor) |
| DEFINE_OP(op_call) |
| DEFINE_OP(op_call_eval) |
| DEFINE_OP(op_call_varargs) |
| DEFINE_OP(op_catch) |
| DEFINE_OP(op_construct) |
| DEFINE_OP(op_get_callee) |
| DEFINE_OP(op_create_this) |
| DEFINE_OP(op_to_this) |
| DEFINE_OP(op_init_lazy_reg) |
| DEFINE_OP(op_create_arguments) |
| DEFINE_OP(op_debug) |
| DEFINE_OP(op_del_by_id) |
| DEFINE_OP(op_div) |
| DEFINE_OP(op_end) |
| DEFINE_OP(op_enter) |
| DEFINE_OP(op_create_activation) |
| DEFINE_OP(op_eq) |
| DEFINE_OP(op_eq_null) |
| case op_get_by_id_out_of_line: |
| case op_get_array_length: |
| DEFINE_OP(op_get_by_id) |
| DEFINE_OP(op_get_arguments_length) |
| DEFINE_OP(op_get_by_val) |
| DEFINE_OP(op_get_argument_by_val) |
| DEFINE_OP(op_get_by_pname) |
| DEFINE_OP(op_get_pnames) |
| DEFINE_OP(op_check_has_instance) |
| DEFINE_OP(op_instanceof) |
| DEFINE_OP(op_is_undefined) |
| DEFINE_OP(op_is_boolean) |
| DEFINE_OP(op_is_number) |
| DEFINE_OP(op_is_string) |
| DEFINE_OP(op_jeq_null) |
| DEFINE_OP(op_jfalse) |
| DEFINE_OP(op_jmp) |
| DEFINE_OP(op_jneq_null) |
| DEFINE_OP(op_jneq_ptr) |
| DEFINE_OP(op_jless) |
| DEFINE_OP(op_jlesseq) |
| DEFINE_OP(op_jgreater) |
| DEFINE_OP(op_jgreatereq) |
| DEFINE_OP(op_jnless) |
| DEFINE_OP(op_jnlesseq) |
| DEFINE_OP(op_jngreater) |
| DEFINE_OP(op_jngreatereq) |
| DEFINE_OP(op_jtrue) |
| DEFINE_OP(op_loop_hint) |
| DEFINE_OP(op_lshift) |
| DEFINE_OP(op_mod) |
| DEFINE_OP(op_mov) |
| DEFINE_OP(op_mul) |
| DEFINE_OP(op_negate) |
| DEFINE_OP(op_neq) |
| DEFINE_OP(op_neq_null) |
| DEFINE_OP(op_new_array) |
| DEFINE_OP(op_new_array_with_size) |
| DEFINE_OP(op_new_array_buffer) |
| DEFINE_OP(op_new_func) |
| DEFINE_OP(op_new_func_exp) |
| DEFINE_OP(op_new_object) |
| DEFINE_OP(op_new_regexp) |
| DEFINE_OP(op_next_pname) |
| DEFINE_OP(op_not) |
| DEFINE_OP(op_nstricteq) |
| DEFINE_OP(op_pop_scope) |
| DEFINE_OP(op_dec) |
| DEFINE_OP(op_inc) |
| DEFINE_OP(op_profile_did_call) |
| DEFINE_OP(op_profile_will_call) |
| DEFINE_OP(op_push_name_scope) |
| DEFINE_OP(op_push_with_scope) |
| case op_put_by_id_out_of_line: |
| case op_put_by_id_transition_direct: |
| case op_put_by_id_transition_normal: |
| case op_put_by_id_transition_direct_out_of_line: |
| case op_put_by_id_transition_normal_out_of_line: |
| DEFINE_OP(op_put_by_id) |
| DEFINE_OP(op_put_by_index) |
| DEFINE_OP(op_put_by_val) |
| DEFINE_OP(op_put_getter_setter) |
| case op_init_global_const_nop: |
| NEXT_OPCODE(op_init_global_const_nop); |
| DEFINE_OP(op_init_global_const) |
| |
| DEFINE_OP(op_ret) |
| DEFINE_OP(op_ret_object_or_this) |
| DEFINE_OP(op_rshift) |
| DEFINE_OP(op_urshift) |
| DEFINE_OP(op_strcat) |
| DEFINE_OP(op_stricteq) |
| DEFINE_OP(op_sub) |
| DEFINE_OP(op_switch_char) |
| DEFINE_OP(op_switch_imm) |
| DEFINE_OP(op_switch_string) |
| DEFINE_OP(op_tear_off_activation) |
| DEFINE_OP(op_tear_off_arguments) |
| DEFINE_OP(op_throw) |
| DEFINE_OP(op_throw_static_error) |
| DEFINE_OP(op_to_number) |
| DEFINE_OP(op_to_primitive) |
| |
| DEFINE_OP(op_resolve_scope) |
| DEFINE_OP(op_get_from_scope) |
| DEFINE_OP(op_put_to_scope) |
| |
| case op_get_by_id_chain: |
| case op_get_by_id_generic: |
| case op_get_by_id_proto: |
| case op_get_by_id_self: |
| case op_get_by_id_getter_chain: |
| case op_get_by_id_getter_proto: |
| case op_get_by_id_getter_self: |
| case op_get_by_id_custom_chain: |
| case op_get_by_id_custom_proto: |
| case op_get_by_id_custom_self: |
| case op_get_string_length: |
| case op_put_by_id_generic: |
| case op_put_by_id_replace: |
| case op_put_by_id_transition: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| RELEASE_ASSERT(m_callLinkInfoIndex == m_callStructureStubCompilationInfo.size()); |
| |
| #ifndef NDEBUG |
| // Reset this, in order to guard its use with ASSERTs. |
| m_bytecodeOffset = (unsigned)-1; |
| #endif |
| } |
| |
| void JIT::privateCompileLinkPass() |
| { |
| unsigned jmpTableCount = m_jmpTable.size(); |
| for (unsigned i = 0; i < jmpTableCount; ++i) |
| m_jmpTable[i].from.linkTo(m_labels[m_jmpTable[i].toBytecodeOffset], this); |
| m_jmpTable.clear(); |
| } |
| |
| void JIT::privateCompileSlowCases() |
| { |
| Instruction* instructionsBegin = m_codeBlock->instructions().begin(); |
| |
| m_propertyAccessInstructionIndex = 0; |
| m_byValInstructionIndex = 0; |
| m_callLinkInfoIndex = 0; |
| |
| #if ENABLE(VALUE_PROFILER) |
| // Use this to assert that slow-path code associates new profiling sites with existing |
| // ValueProfiles rather than creating new ones. This ensures that for a given instruction |
| // (say, get_by_id) we get combined statistics for both the fast-path executions of that |
| // instructions and the slow-path executions. Furthermore, if the slow-path code created |
| // new ValueProfiles then the ValueProfiles would no longer be sorted by bytecode offset, |
| // which would break the invariant necessary to use CodeBlock::valueProfileForBytecodeOffset(). |
| unsigned numberOfValueProfiles = m_codeBlock->numberOfValueProfiles(); |
| #endif |
| |
| for (Vector<SlowCaseEntry>::iterator iter = m_slowCases.begin(); iter != m_slowCases.end();) { |
| #if USE(JSVALUE64) |
| killLastResultRegister(); |
| #endif |
| |
| m_bytecodeOffset = iter->to; |
| |
| unsigned firstTo = m_bytecodeOffset; |
| |
| Instruction* currentInstruction = instructionsBegin + m_bytecodeOffset; |
| |
| #if ENABLE(VALUE_PROFILER) |
| RareCaseProfile* rareCaseProfile = 0; |
| if (shouldEmitProfiling()) |
| rareCaseProfile = m_codeBlock->addRareCaseProfile(m_bytecodeOffset); |
| #endif |
| |
| #if ENABLE(JIT_VERBOSE) |
| dataLogF("Old JIT emitting slow code for bc#%u at offset 0x%lx.\n", m_bytecodeOffset, (long)debugOffset()); |
| #endif |
| |
| if (m_disassembler) |
| m_disassembler->setForBytecodeSlowPath(m_bytecodeOffset, label()); |
| |
| switch (m_interpreter->getOpcodeID(currentInstruction->u.opcode)) { |
| DEFINE_SLOWCASE_OP(op_add) |
| DEFINE_SLOWCASE_OP(op_bitand) |
| DEFINE_SLOWCASE_OP(op_bitor) |
| DEFINE_SLOWCASE_OP(op_bitxor) |
| DEFINE_SLOWCASE_OP(op_call) |
| DEFINE_SLOWCASE_OP(op_call_eval) |
| DEFINE_SLOWCASE_OP(op_call_varargs) |
| DEFINE_SLOWCASE_OP(op_construct) |
| DEFINE_SLOWCASE_OP(op_to_this) |
| DEFINE_SLOWCASE_OP(op_create_this) |
| DEFINE_SLOWCASE_OP(op_div) |
| DEFINE_SLOWCASE_OP(op_eq) |
| DEFINE_SLOWCASE_OP(op_get_callee) |
| case op_get_by_id_out_of_line: |
| case op_get_array_length: |
| DEFINE_SLOWCASE_OP(op_get_by_id) |
| DEFINE_SLOWCASE_OP(op_get_arguments_length) |
| DEFINE_SLOWCASE_OP(op_get_by_val) |
| DEFINE_SLOWCASE_OP(op_get_argument_by_val) |
| DEFINE_SLOWCASE_OP(op_get_by_pname) |
| DEFINE_SLOWCASE_OP(op_check_has_instance) |
| DEFINE_SLOWCASE_OP(op_instanceof) |
| DEFINE_SLOWCASE_OP(op_jfalse) |
| DEFINE_SLOWCASE_OP(op_jless) |
| DEFINE_SLOWCASE_OP(op_jlesseq) |
| DEFINE_SLOWCASE_OP(op_jgreater) |
| DEFINE_SLOWCASE_OP(op_jgreatereq) |
| DEFINE_SLOWCASE_OP(op_jnless) |
| DEFINE_SLOWCASE_OP(op_jnlesseq) |
| DEFINE_SLOWCASE_OP(op_jngreater) |
| DEFINE_SLOWCASE_OP(op_jngreatereq) |
| DEFINE_SLOWCASE_OP(op_jtrue) |
| DEFINE_SLOWCASE_OP(op_loop_hint) |
| DEFINE_SLOWCASE_OP(op_lshift) |
| DEFINE_SLOWCASE_OP(op_mod) |
| DEFINE_SLOWCASE_OP(op_mul) |
| DEFINE_SLOWCASE_OP(op_negate) |
| DEFINE_SLOWCASE_OP(op_neq) |
| DEFINE_SLOWCASE_OP(op_new_object) |
| DEFINE_SLOWCASE_OP(op_not) |
| DEFINE_SLOWCASE_OP(op_nstricteq) |
| DEFINE_SLOWCASE_OP(op_dec) |
| DEFINE_SLOWCASE_OP(op_inc) |
| case op_put_by_id_out_of_line: |
| case op_put_by_id_transition_direct: |
| case op_put_by_id_transition_normal: |
| case op_put_by_id_transition_direct_out_of_line: |
| case op_put_by_id_transition_normal_out_of_line: |
| DEFINE_SLOWCASE_OP(op_put_by_id) |
| DEFINE_SLOWCASE_OP(op_put_by_val) |
| DEFINE_SLOWCASE_OP(op_rshift) |
| DEFINE_SLOWCASE_OP(op_urshift) |
| DEFINE_SLOWCASE_OP(op_stricteq) |
| DEFINE_SLOWCASE_OP(op_sub) |
| DEFINE_SLOWCASE_OP(op_to_number) |
| DEFINE_SLOWCASE_OP(op_to_primitive) |
| |
| DEFINE_SLOWCASE_OP(op_resolve_scope) |
| DEFINE_SLOWCASE_OP(op_get_from_scope) |
| DEFINE_SLOWCASE_OP(op_put_to_scope) |
| |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| |
| RELEASE_ASSERT_WITH_MESSAGE(iter == m_slowCases.end() || firstTo != iter->to, "Not enough jumps linked in slow case codegen."); |
| RELEASE_ASSERT_WITH_MESSAGE(firstTo == (iter - 1)->to, "Too many jumps linked in slow case codegen."); |
| |
| #if ENABLE(VALUE_PROFILER) |
| if (shouldEmitProfiling()) |
| add32(TrustedImm32(1), AbsoluteAddress(&rareCaseProfile->m_counter)); |
| #endif |
| |
| emitJumpSlowToHot(jump(), 0); |
| } |
| |
| RELEASE_ASSERT(m_propertyAccessInstructionIndex == m_propertyAccessCompilationInfo.size()); |
| RELEASE_ASSERT(m_callLinkInfoIndex == m_callStructureStubCompilationInfo.size()); |
| #if ENABLE(VALUE_PROFILER) |
| RELEASE_ASSERT(numberOfValueProfiles == m_codeBlock->numberOfValueProfiles()); |
| #endif |
| |
| #ifndef NDEBUG |
| // Reset this, in order to guard its use with ASSERTs. |
| m_bytecodeOffset = (unsigned)-1; |
| #endif |
| } |
| |
| ALWAYS_INLINE void PropertyStubCompilationInfo::copyToStubInfo(StructureStubInfo& info, LinkBuffer &linkBuffer) |
| { |
| ASSERT(bytecodeIndex != std::numeric_limits<unsigned>::max()); |
| info.codeOrigin = CodeOrigin(bytecodeIndex); |
| info.callReturnLocation = linkBuffer.locationOf(callReturnLocation); |
| |
| info.patch.deltaCheckImmToCall = MacroAssembler::differenceBetweenCodePtr(linkBuffer.locationOf(structureToCompare), info.callReturnLocation); |
| info.patch.deltaCallToStructCheck = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(structureCheck)); |
| |
| info.patch.deltaCallToSlowCase = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(coldPathBegin)); |
| info.patch.deltaCallToDone = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(done)); |
| info.patch.deltaCallToStorageLoad = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(propertyStorageLoad)); |
| |
| info.patch.baseGPR = GPRInfo::regT0; |
| |
| RegisterSet usedRegisters; |
| usedRegisters.set(GPRInfo::regT0); |
| |
| #if USE(JSVALUE64) // JSVALUE cases |
| switch (m_type) { |
| case GetById: |
| info.patch.deltaCallToLoadOrStore = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(getDisplacementLabel)); |
| info.patch.valueGPR = GPRInfo::regT0; |
| break; |
| case PutById: |
| info.patch.deltaCallToLoadOrStore = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(putDisplacementLabel)); |
| info.patch.valueGPR = GPRInfo::regT1; |
| usedRegisters.set(GPRInfo::regT1); |
| break; |
| } |
| #else // JSVALUE cases |
| switch (m_type) { |
| case GetById: |
| info.patch.deltaCallToTagLoadOrStore = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(getDisplacementLabel2)); |
| info.patch.deltaCallToPayloadLoadOrStore = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(getDisplacementLabel1)); |
| info.patch.valueGPR = GPRInfo::regT0; |
| info.patch.valueTagGPR = GPRInfo::regT1; |
| usedRegisters.set(GPRInfo::regT1); |
| break; |
| case PutById: |
| info.patch.deltaCallToTagLoadOrStore = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(putDisplacementLabel2)); |
| info.patch.deltaCallToPayloadLoadOrStore = MacroAssembler::differenceBetweenCodePtr(info.callReturnLocation, linkBuffer.locationOf(putDisplacementLabel1)); |
| info.patch.valueGPR = GPRInfo::regT2; |
| info.patch.valueTagGPR = GPRInfo::regT3; |
| usedRegisters.set(GPRInfo::regT2); |
| usedRegisters.set(GPRInfo::regT3); |
| break; |
| } |
| #endif // JSVALUE cases |
| |
| info.patch.usedRegisters = usedRegisters; |
| info.patch.registersFlushed = true; |
| } |
| |
| CompilationResult JIT::privateCompile(JITCompilationEffort effort) |
| { |
| #if ENABLE(VALUE_PROFILER) |
| DFG::CapabilityLevel level = m_codeBlock->capabilityLevel(); |
| switch (level) { |
| case DFG::CannotCompile: |
| m_canBeOptimized = false; |
| m_canBeOptimizedOrInlined = false; |
| m_shouldEmitProfiling = false; |
| break; |
| case DFG::CanInline: |
| m_canBeOptimized = false; |
| m_canBeOptimizedOrInlined = true; |
| m_shouldEmitProfiling = true; |
| break; |
| case DFG::CanCompile: |
| case DFG::CanCompileAndInline: |
| m_canBeOptimized = true; |
| m_canBeOptimizedOrInlined = true; |
| m_shouldEmitProfiling = true; |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| break; |
| } |
| |
| switch (m_codeBlock->codeType()) { |
| case GlobalCode: |
| case EvalCode: |
| m_codeBlock->m_shouldAlwaysBeInlined = false; |
| break; |
| case FunctionCode: |
| // We could have already set it to false because we detected an uninlineable call. |
| // Don't override that observation. |
| m_codeBlock->m_shouldAlwaysBeInlined &= canInline(level) && DFG::mightInlineFunction(m_codeBlock); |
| break; |
| } |
| #endif |
| |
| if (Options::showDisassembly() || m_vm->m_perBytecodeProfiler) |
| m_disassembler = adoptPtr(new JITDisassembler(m_codeBlock)); |
| if (m_vm->m_perBytecodeProfiler) { |
| m_compilation = adoptRef( |
| new Profiler::Compilation( |
| m_vm->m_perBytecodeProfiler->ensureBytecodesFor(m_codeBlock), |
| Profiler::Baseline)); |
| m_compilation->addProfiledBytecodes(*m_vm->m_perBytecodeProfiler, m_codeBlock); |
| } |
| |
| if (m_disassembler) |
| m_disassembler->setStartOfCode(label()); |
| |
| // Just add a little bit of randomness to the codegen |
| if (m_randomGenerator.getUint32() & 1) |
| nop(); |
| |
| preserveReturnAddressAfterCall(regT2); |
| emitPutToCallFrameHeader(regT2, JSStack::ReturnPC); |
| emitPutImmediateToCallFrameHeader(m_codeBlock, JSStack::CodeBlock); |
| |
| Label beginLabel(this); |
| |
| sampleCodeBlock(m_codeBlock); |
| #if ENABLE(OPCODE_SAMPLING) |
| sampleInstruction(m_codeBlock->instructions().begin()); |
| #endif |
| |
| Jump stackCheck; |
| if (m_codeBlock->codeType() == FunctionCode) { |
| #if ENABLE(DFG_JIT) |
| #if DFG_ENABLE(SUCCESS_STATS) |
| static SamplingCounter counter("orignalJIT"); |
| emitCount(counter); |
| #endif |
| #endif |
| |
| #if ENABLE(VALUE_PROFILER) |
| ASSERT(m_bytecodeOffset == (unsigned)-1); |
| if (shouldEmitProfiling()) { |
| for (int argument = 0; argument < m_codeBlock->numParameters(); ++argument) { |
| // If this is a constructor, then we want to put in a dummy profiling site (to |
| // keep things consistent) but we don't actually want to record the dummy value. |
| if (m_codeBlock->m_isConstructor && !argument) |
| continue; |
| int offset = CallFrame::argumentOffsetIncludingThis(argument) * static_cast<int>(sizeof(Register)); |
| #if USE(JSVALUE64) |
| load64(Address(callFrameRegister, offset), regT0); |
| #elif USE(JSVALUE32_64) |
| load32(Address(callFrameRegister, offset + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0); |
| load32(Address(callFrameRegister, offset + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1); |
| #endif |
| emitValueProfilingSite(m_codeBlock->valueProfileForArgument(argument), regT4); |
| } |
| } |
| #endif |
| |
| addPtr(TrustedImm32(-m_codeBlock->m_numCalleeRegisters * sizeof(Register)), callFrameRegister, regT1); |
| stackCheck = branchPtr(Above, AbsoluteAddress(m_vm->interpreter->stack().addressOfEnd()), regT1); |
| } |
| |
| Label functionBody = label(); |
| |
| privateCompileMainPass(); |
| privateCompileLinkPass(); |
| privateCompileSlowCases(); |
| |
| if (m_disassembler) |
| m_disassembler->setEndOfSlowPath(label()); |
| |
| Label arityCheck; |
| if (m_codeBlock->codeType() == FunctionCode) { |
| stackCheck.link(this); |
| m_bytecodeOffset = 0; |
| callOperationWithCallFrameRollbackOnException(operationStackCheck, m_codeBlock); |
| #ifndef NDEBUG |
| m_bytecodeOffset = (unsigned)-1; // Reset this, in order to guard its use with ASSERTs. |
| #endif |
| jump(functionBody); |
| |
| arityCheck = label(); |
| store8(TrustedImm32(0), &m_codeBlock->m_shouldAlwaysBeInlined); |
| preserveReturnAddressAfterCall(regT2); |
| emitPutToCallFrameHeader(regT2, JSStack::ReturnPC); |
| emitPutImmediateToCallFrameHeader(m_codeBlock, JSStack::CodeBlock); |
| |
| load32(payloadFor(JSStack::ArgumentCount), regT1); |
| branch32(AboveOrEqual, regT1, TrustedImm32(m_codeBlock->m_numParameters)).linkTo(beginLabel, this); |
| |
| m_bytecodeOffset = 0; |
| |
| callOperationWithCallFrameRollbackOnException(m_codeBlock->m_isConstructor ? operationConstructArityCheck : operationCallArityCheck); |
| if (returnValueRegister != regT0) |
| move(returnValueRegister, regT0); |
| branchTest32(Zero, regT0).linkTo(beginLabel, this); |
| emitNakedCall(m_vm->getCTIStub(arityFixup).code()); |
| |
| #if !ASSERT_DISABLED |
| m_bytecodeOffset = (unsigned)-1; // Reset this, in order to guard its use with ASSERTs. |
| #endif |
| |
| jump(beginLabel); |
| } |
| |
| ASSERT(m_jmpTable.isEmpty()); |
| |
| privateCompileExceptionHandlers(); |
| |
| if (m_disassembler) |
| m_disassembler->setEndOfCode(label()); |
| |
| LinkBuffer patchBuffer(*m_vm, this, m_codeBlock, effort); |
| if (patchBuffer.didFailToAllocate()) |
| return CompilationFailed; |
| |
| // Translate vPC offsets into addresses in JIT generated code, for switch tables. |
| for (unsigned i = 0; i < m_switches.size(); ++i) { |
| SwitchRecord record = m_switches[i]; |
| unsigned bytecodeOffset = record.bytecodeOffset; |
| |
| if (record.type != SwitchRecord::String) { |
| ASSERT(record.type == SwitchRecord::Immediate || record.type == SwitchRecord::Character); |
| ASSERT(record.jumpTable.simpleJumpTable->branchOffsets.size() == record.jumpTable.simpleJumpTable->ctiOffsets.size()); |
| |
| record.jumpTable.simpleJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeOffset + record.defaultOffset]); |
| |
| for (unsigned j = 0; j < record.jumpTable.simpleJumpTable->branchOffsets.size(); ++j) { |
| unsigned offset = record.jumpTable.simpleJumpTable->branchOffsets[j]; |
| record.jumpTable.simpleJumpTable->ctiOffsets[j] = offset ? patchBuffer.locationOf(m_labels[bytecodeOffset + offset]) : record.jumpTable.simpleJumpTable->ctiDefault; |
| } |
| } else { |
| ASSERT(record.type == SwitchRecord::String); |
| |
| record.jumpTable.stringJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeOffset + record.defaultOffset]); |
| |
| StringJumpTable::StringOffsetTable::iterator end = record.jumpTable.stringJumpTable->offsetTable.end(); |
| for (StringJumpTable::StringOffsetTable::iterator it = record.jumpTable.stringJumpTable->offsetTable.begin(); it != end; ++it) { |
| unsigned offset = it->value.branchOffset; |
| it->value.ctiOffset = offset ? patchBuffer.locationOf(m_labels[bytecodeOffset + offset]) : record.jumpTable.stringJumpTable->ctiDefault; |
| } |
| } |
| } |
| |
| for (size_t i = 0; i < m_codeBlock->numberOfExceptionHandlers(); ++i) { |
| HandlerInfo& handler = m_codeBlock->exceptionHandler(i); |
| handler.nativeCode = patchBuffer.locationOf(m_labels[handler.target]); |
| } |
| |
| for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) { |
| if (iter->to) |
| patchBuffer.link(iter->from, FunctionPtr(iter->to)); |
| } |
| |
| m_codeBlock->setNumberOfStructureStubInfos(m_propertyAccessCompilationInfo.size()); |
| for (unsigned i = 0; i < m_propertyAccessCompilationInfo.size(); ++i) |
| m_propertyAccessCompilationInfo[i].copyToStubInfo(m_codeBlock->structureStubInfo(i), patchBuffer); |
| m_codeBlock->setNumberOfByValInfos(m_byValCompilationInfo.size()); |
| for (unsigned i = 0; i < m_byValCompilationInfo.size(); ++i) { |
| CodeLocationJump badTypeJump = CodeLocationJump(patchBuffer.locationOf(m_byValCompilationInfo[i].badTypeJump)); |
| CodeLocationLabel doneTarget = patchBuffer.locationOf(m_byValCompilationInfo[i].doneTarget); |
| CodeLocationLabel slowPathTarget = patchBuffer.locationOf(m_byValCompilationInfo[i].slowPathTarget); |
| CodeLocationCall returnAddress = patchBuffer.locationOf(m_byValCompilationInfo[i].returnAddress); |
| |
| m_codeBlock->byValInfo(i) = ByValInfo( |
| m_byValCompilationInfo[i].bytecodeIndex, |
| badTypeJump, |
| m_byValCompilationInfo[i].arrayMode, |
| differenceBetweenCodePtr(badTypeJump, doneTarget), |
| differenceBetweenCodePtr(returnAddress, slowPathTarget)); |
| } |
| m_codeBlock->setNumberOfCallLinkInfos(m_callStructureStubCompilationInfo.size()); |
| for (unsigned i = 0; i < m_codeBlock->numberOfCallLinkInfos(); ++i) { |
| CallLinkInfo& info = m_codeBlock->callLinkInfo(i); |
| info.callType = m_callStructureStubCompilationInfo[i].callType; |
| info.codeOrigin = CodeOrigin(m_callStructureStubCompilationInfo[i].bytecodeIndex); |
| info.callReturnLocation = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].callReturnLocation); |
| info.hotPathBegin = patchBuffer.locationOf(m_callStructureStubCompilationInfo[i].hotPathBegin); |
| info.hotPathOther = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].hotPathOther); |
| info.calleeGPR = regT0; |
| } |
| |
| #if ENABLE(DFG_JIT) || ENABLE(LLINT) |
| if (canBeOptimizedOrInlined() |
| #if ENABLE(LLINT) |
| || true |
| #endif |
| ) { |
| CompactJITCodeMap::Encoder jitCodeMapEncoder; |
| for (unsigned bytecodeOffset = 0; bytecodeOffset < m_labels.size(); ++bytecodeOffset) { |
| if (m_labels[bytecodeOffset].isSet()) |
| jitCodeMapEncoder.append(bytecodeOffset, patchBuffer.offsetOf(m_labels[bytecodeOffset])); |
| } |
| m_codeBlock->setJITCodeMap(jitCodeMapEncoder.finish()); |
| } |
| #endif |
| |
| MacroAssemblerCodePtr withArityCheck; |
| if (m_codeBlock->codeType() == FunctionCode) |
| withArityCheck = patchBuffer.locationOf(arityCheck); |
| |
| if (Options::showDisassembly()) |
| m_disassembler->dump(patchBuffer); |
| if (m_compilation) { |
| m_disassembler->reportToProfiler(m_compilation.get(), patchBuffer); |
| m_vm->m_perBytecodeProfiler->addCompilation(m_compilation); |
| } |
| |
| CodeRef result = patchBuffer.finalizeCodeWithoutDisassembly(); |
| |
| m_vm->machineCodeBytesPerBytecodeWordForBaselineJIT.add( |
| static_cast<double>(result.size()) / |
| static_cast<double>(m_codeBlock->instructions().size())); |
| |
| m_codeBlock->shrinkToFit(CodeBlock::LateShrink); |
| m_codeBlock->setJITCode( |
| adoptRef(new DirectJITCode(result, JITCode::BaselineJIT)), |
| withArityCheck); |
| |
| #if ENABLE(JIT_VERBOSE) |
| dataLogF("JIT generated code for %p at [%p, %p).\n", m_codeBlock, result.executableMemory()->start(), result.executableMemory()->end()); |
| #endif |
| |
| return CompilationSuccessful; |
| } |
| |
| void JIT::linkFor(ExecState* exec, JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, JIT::CodePtr code, CallLinkInfo* callLinkInfo, VM* vm, CodeSpecializationKind kind) |
| { |
| RepatchBuffer repatchBuffer(callerCodeBlock); |
| |
| ASSERT(!callLinkInfo->isLinked()); |
| callLinkInfo->callee.set(*vm, callLinkInfo->hotPathBegin, callerCodeBlock->ownerExecutable(), callee); |
| callLinkInfo->lastSeenCallee.set(*vm, callerCodeBlock->ownerExecutable(), callee); |
| repatchBuffer.relink(callLinkInfo->hotPathOther, code); |
| |
| if (calleeCodeBlock) |
| calleeCodeBlock->linkIncomingCall(exec, callLinkInfo); |
| |
| // Patch the slow patch so we do not continue to try to link. |
| if (kind == CodeForCall) { |
| ASSERT(callLinkInfo->callType == CallLinkInfo::Call |
| || callLinkInfo->callType == CallLinkInfo::CallVarargs); |
| if (callLinkInfo->callType == CallLinkInfo::Call) { |
| repatchBuffer.relink(callLinkInfo->callReturnLocation, vm->getCTIStub(linkClosureCallThunkGenerator).code()); |
| return; |
| } |
| |
| repatchBuffer.relink(callLinkInfo->callReturnLocation, vm->getCTIStub(virtualCallThunkGenerator).code()); |
| return; |
| } |
| |
| ASSERT(kind == CodeForConstruct); |
| repatchBuffer.relink(callLinkInfo->callReturnLocation, vm->getCTIStub(virtualConstructThunkGenerator).code()); |
| } |
| |
| void JIT::linkSlowCall(CodeBlock* callerCodeBlock, CallLinkInfo* callLinkInfo) |
| { |
| RepatchBuffer repatchBuffer(callerCodeBlock); |
| |
| repatchBuffer.relink(callLinkInfo->callReturnLocation, callerCodeBlock->vm()->getCTIStub(virtualCallThunkGenerator).code()); |
| } |
| |
| void JIT::privateCompileExceptionHandlers() |
| { |
| if (m_exceptionChecks.empty() && m_exceptionChecksWithCallFrameRollback.empty()) |
| return; |
| |
| Jump doLookup; |
| |
| if (!m_exceptionChecksWithCallFrameRollback.empty()) { |
| // Remove hostCallFlag from caller |
| m_exceptionChecksWithCallFrameRollback.link(this); |
| emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, GPRInfo::argumentGPR0); |
| andPtr(TrustedImm32(safeCast<int32_t>(~CallFrame::hostCallFrameFlag())), GPRInfo::argumentGPR0); |
| doLookup = jump(); |
| } |
| |
| if (!m_exceptionChecks.empty()) |
| m_exceptionChecks.link(this); |
| |
| // lookupExceptionHandler is passed one argument, the exec (the CallFrame*). |
| move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0); |
| |
| if (doLookup.isSet()) |
| doLookup.link(this); |
| |
| #if CPU(X86) |
| // FIXME: should use the call abstraction, but this is currently in the SpeculativeJIT layer! |
| poke(GPRInfo::argumentGPR0); |
| #endif |
| m_calls.append(CallRecord(call(), (unsigned)-1, FunctionPtr(lookupExceptionHandler).value())); |
| // lookupExceptionHandler leaves the handler CallFrame* in the returnValueGPR, |
| // and the address of the handler in returnValueGPR2. |
| jump(GPRInfo::returnValueGPR2); |
| } |
| |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(JIT) |
