| /* |
| * Copyright (C) 2008, 2009, 2012-2016 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" |
| |
| #include "CodeBlock.h" |
| #include "CodeBlockWithJITType.h" |
| #include "DFGCapabilities.h" |
| #include "Interpreter.h" |
| #include "JITInlines.h" |
| #include "JITOperations.h" |
| #include "JSArray.h" |
| #include "JSCInlines.h" |
| #include "JSFunction.h" |
| #include "LinkBuffer.h" |
| #include "MaxFrameExtentForSlowPathCall.h" |
| #include "PCToCodeOriginMap.h" |
| #include "ProfilerDatabase.h" |
| #include "ResultType.h" |
| #include "SlowPathCall.h" |
| #include "StackAlignment.h" |
| #include "TypeProfilerLog.h" |
| #include <wtf/CryptographicallyRandomNumber.h> |
| #include <wtf/SimpleStats.h> |
| |
| using namespace std; |
| |
| namespace JSC { |
| |
| double totalBaselineCompileTime; |
| double totalDFGCompileTime; |
| double totalFTLCompileTime; |
| double totalFTLDFGCompileTime; |
| double totalFTLB3CompileTime; |
| |
| void ctiPatchCallByReturnAddress(ReturnAddressPtr returnAddress, FunctionPtr newCalleeFunction) |
| { |
| MacroAssembler::repatchCall( |
| CodeLocationCall(MacroAssemblerCodePtr(returnAddress)), |
| newCalleeFunction); |
| } |
| |
| JIT::CodeRef JIT::compileCTINativeCall(VM* vm, NativeFunction func) |
| { |
| if (!vm->canUseJIT()) |
| return CodeRef::createLLIntCodeRef(llint_native_call_trampoline); |
| JIT jit(vm, 0); |
| return jit.privateCompileCTINativeCall(vm, func); |
| } |
| |
| JIT::JIT(VM* vm, CodeBlock* codeBlock) |
| : JSInterfaceJIT(vm, codeBlock) |
| , m_interpreter(vm->interpreter) |
| , m_labels(codeBlock ? codeBlock->numberOfInstructions() : 0) |
| , m_bytecodeOffset(std::numeric_limits<unsigned>::max()) |
| , m_getByIdIndex(UINT_MAX) |
| , m_putByIdIndex(UINT_MAX) |
| , m_byValInstructionIndex(UINT_MAX) |
| , m_callLinkInfoIndex(UINT_MAX) |
| , m_randomGenerator(cryptographicallyRandomNumber()) |
| , m_pcToCodeOriginMapBuilder(*vm) |
| , m_canBeOptimized(false) |
| , m_shouldEmitProfiling(false) |
| { |
| } |
| |
| JIT::~JIT() |
| { |
| } |
| |
| #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); |
| |
| copyCalleeSavesFromFrameOrRegisterToVMEntryFrameCalleeSavesBuffer(); |
| |
| callOperation(operationOptimize, m_bytecodeOffset); |
| skipOptimize.append(branchTestPtr(Zero, returnValueGPR)); |
| move(returnValueGPR2, stackPointerRegister); |
| jump(returnValueGPR); |
| skipOptimize.link(this); |
| } |
| #endif |
| |
| void JIT::emitNotifyWrite(WatchpointSet* set) |
| { |
| if (!set || set->state() == IsInvalidated) { |
| addSlowCase(Jump()); |
| return; |
| } |
| |
| addSlowCase(branch8(NotEqual, AbsoluteAddress(set->addressOfState()), TrustedImm32(IsInvalidated))); |
| } |
| |
| void JIT::emitNotifyWrite(GPRReg pointerToSet) |
| { |
| addSlowCase(branch8(NotEqual, Address(pointerToSet, WatchpointSet::offsetOfState()), TrustedImm32(IsInvalidated))); |
| } |
| |
| void JIT::assertStackPointerOffset() |
| { |
| if (ASSERT_DISABLED) |
| return; |
| |
| addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, regT0); |
| Jump ok = branchPtr(Equal, regT0, stackPointerRegister); |
| breakpoint(); |
| ok.link(this); |
| } |
| |
| #define NEXT_OPCODE(name) \ |
| m_bytecodeOffset += OPCODE_LENGTH(name); \ |
| break; |
| |
| #define DEFINE_SLOW_OP(name) \ |
| case op_##name: { \ |
| JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_##name); \ |
| slowPathCall.call(); \ |
| NEXT_OPCODE(op_##name); \ |
| } |
| |
| #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() |
| { |
| if (false) |
| dataLog("Compiling ", *m_codeBlock, "\n"); |
| |
| jitAssertTagsInPlace(); |
| jitAssertArgumentCountSane(); |
| |
| Instruction* instructionsBegin = m_codeBlock->instructions().begin(); |
| unsigned instructionCount = m_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); |
| |
| m_pcToCodeOriginMapBuilder.appendItem(label(), CodeOrigin(m_bytecodeOffset)); |
| |
| #if ENABLE(OPCODE_SAMPLING) |
| if (m_bytecodeOffset > 0) // Avoid the overhead of sampling op_enter twice. |
| sampleInstruction(currentInstruction); |
| #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())); |
| } |
| |
| if (Options::eagerlyUpdateTopCallFrame()) |
| updateTopCallFrame(); |
| |
| unsigned bytecodeOffset = m_bytecodeOffset; |
| |
| switch (opcodeID) { |
| DEFINE_SLOW_OP(in) |
| DEFINE_SLOW_OP(less) |
| DEFINE_SLOW_OP(lesseq) |
| DEFINE_SLOW_OP(greater) |
| DEFINE_SLOW_OP(greatereq) |
| DEFINE_SLOW_OP(is_function) |
| DEFINE_SLOW_OP(is_object_or_null) |
| DEFINE_SLOW_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_tail_call) |
| DEFINE_OP(op_call_eval) |
| DEFINE_OP(op_call_varargs) |
| DEFINE_OP(op_tail_call_varargs) |
| DEFINE_OP(op_tail_call_forward_arguments) |
| DEFINE_OP(op_construct_varargs) |
| DEFINE_OP(op_catch) |
| DEFINE_OP(op_construct) |
| DEFINE_OP(op_create_this) |
| DEFINE_OP(op_to_this) |
| DEFINE_OP(op_create_direct_arguments) |
| DEFINE_OP(op_create_scoped_arguments) |
| DEFINE_OP(op_create_cloned_arguments) |
| DEFINE_OP(op_argument_count) |
| DEFINE_OP(op_create_rest) |
| DEFINE_OP(op_get_rest_length) |
| DEFINE_OP(op_check_tdz) |
| DEFINE_OP(op_assert) |
| DEFINE_OP(op_debug) |
| DEFINE_OP(op_del_by_id) |
| DEFINE_OP(op_del_by_val) |
| DEFINE_OP(op_div) |
| DEFINE_OP(op_end) |
| DEFINE_OP(op_enter) |
| DEFINE_OP(op_get_scope) |
| DEFINE_OP(op_eq) |
| DEFINE_OP(op_eq_null) |
| DEFINE_OP(op_try_get_by_id) |
| case op_get_array_length: |
| case op_get_by_id_proto_load: |
| case op_get_by_id_unset: |
| DEFINE_OP(op_get_by_id) |
| DEFINE_OP(op_get_by_id_with_this) |
| DEFINE_OP(op_get_by_val) |
| DEFINE_OP(op_get_by_val_with_this) |
| DEFINE_OP(op_overrides_has_instance) |
| DEFINE_OP(op_instanceof) |
| DEFINE_OP(op_instanceof_custom) |
| DEFINE_OP(op_is_empty) |
| DEFINE_OP(op_is_undefined) |
| DEFINE_OP(op_is_boolean) |
| DEFINE_OP(op_is_number) |
| DEFINE_OP(op_is_object) |
| DEFINE_OP(op_is_cell_with_type) |
| 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_watchdog) |
| 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_generator_func) |
| DEFINE_OP(op_new_generator_func_exp) |
| DEFINE_OP(op_new_object) |
| DEFINE_OP(op_new_regexp) |
| DEFINE_OP(op_not) |
| DEFINE_OP(op_nstricteq) |
| DEFINE_OP(op_dec) |
| DEFINE_OP(op_inc) |
| DEFINE_OP(op_pow) |
| DEFINE_OP(op_profile_type) |
| DEFINE_OP(op_profile_control_flow) |
| DEFINE_OP(op_push_with_scope) |
| DEFINE_OP(op_create_lexical_environment) |
| DEFINE_OP(op_get_parent_scope) |
| DEFINE_OP(op_put_by_id) |
| DEFINE_OP(op_put_by_id_with_this) |
| DEFINE_OP(op_put_by_index) |
| case op_put_by_val_direct: |
| DEFINE_OP(op_put_by_val) |
| DEFINE_OP(op_put_by_val_with_this) |
| DEFINE_OP(op_put_getter_by_id) |
| DEFINE_OP(op_put_setter_by_id) |
| DEFINE_OP(op_put_getter_setter_by_id) |
| DEFINE_OP(op_put_getter_by_val) |
| DEFINE_OP(op_put_setter_by_val) |
| |
| DEFINE_OP(op_ret) |
| DEFINE_OP(op_rshift) |
| DEFINE_OP(op_unsigned) |
| DEFINE_OP(op_urshift) |
| DEFINE_OP(op_set_function_name) |
| 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_throw) |
| DEFINE_OP(op_throw_static_error) |
| DEFINE_OP(op_to_number) |
| DEFINE_OP(op_to_string) |
| DEFINE_OP(op_to_primitive) |
| |
| DEFINE_OP(op_resolve_scope) |
| DEFINE_OP(op_get_from_scope) |
| DEFINE_OP(op_put_to_scope) |
| DEFINE_OP(op_get_from_arguments) |
| DEFINE_OP(op_put_to_arguments) |
| |
| DEFINE_OP(op_get_enumerable_length) |
| DEFINE_OP(op_has_generic_property) |
| DEFINE_OP(op_has_structure_property) |
| DEFINE_OP(op_has_indexed_property) |
| DEFINE_OP(op_get_direct_pname) |
| DEFINE_OP(op_get_property_enumerator) |
| DEFINE_OP(op_enumerator_structure_pname) |
| DEFINE_OP(op_enumerator_generic_pname) |
| DEFINE_OP(op_to_index_string) |
| |
| DEFINE_OP(op_log_shadow_chicken_prologue) |
| DEFINE_OP(op_log_shadow_chicken_tail) |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| |
| if (false) |
| dataLog("At ", bytecodeOffset, ": ", m_slowCases.size(), "\n"); |
| } |
| |
| RELEASE_ASSERT(m_callLinkInfoIndex == m_callCompilationInfo.size()); |
| |
| #ifndef NDEBUG |
| // Reset this, in order to guard its use with ASSERTs. |
| m_bytecodeOffset = std::numeric_limits<unsigned>::max(); |
| #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_getByIdIndex = 0; |
| m_putByIdIndex = 0; |
| m_byValInstructionIndex = 0; |
| m_callLinkInfoIndex = 0; |
| |
| // 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(); |
| |
| for (Vector<SlowCaseEntry>::iterator iter = m_slowCases.begin(); iter != m_slowCases.end();) { |
| m_bytecodeOffset = iter->to; |
| |
| m_pcToCodeOriginMapBuilder.appendItem(label(), CodeOrigin(m_bytecodeOffset)); |
| |
| unsigned firstTo = m_bytecodeOffset; |
| |
| Instruction* currentInstruction = instructionsBegin + m_bytecodeOffset; |
| |
| RareCaseProfile* rareCaseProfile = 0; |
| if (shouldEmitProfiling()) |
| rareCaseProfile = m_codeBlock->addRareCaseProfile(m_bytecodeOffset); |
| |
| #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_tail_call) |
| DEFINE_SLOWCASE_OP(op_call_eval) |
| DEFINE_SLOWCASE_OP(op_call_varargs) |
| DEFINE_SLOWCASE_OP(op_tail_call_varargs) |
| DEFINE_SLOWCASE_OP(op_tail_call_forward_arguments) |
| DEFINE_SLOWCASE_OP(op_construct_varargs) |
| DEFINE_SLOWCASE_OP(op_construct) |
| DEFINE_SLOWCASE_OP(op_to_this) |
| DEFINE_SLOWCASE_OP(op_check_tdz) |
| DEFINE_SLOWCASE_OP(op_create_this) |
| DEFINE_SLOWCASE_OP(op_div) |
| DEFINE_SLOWCASE_OP(op_eq) |
| DEFINE_SLOWCASE_OP(op_try_get_by_id) |
| case op_get_array_length: |
| case op_get_by_id_proto_load: |
| case op_get_by_id_unset: |
| DEFINE_SLOWCASE_OP(op_get_by_id) |
| DEFINE_SLOWCASE_OP(op_get_by_val) |
| DEFINE_SLOWCASE_OP(op_instanceof) |
| DEFINE_SLOWCASE_OP(op_instanceof_custom) |
| 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_loop_hint) |
| DEFINE_SLOWCASE_OP(op_watchdog) |
| 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) |
| DEFINE_SLOWCASE_OP(op_put_by_id) |
| case op_put_by_val_direct: |
| DEFINE_SLOWCASE_OP(op_put_by_val) |
| DEFINE_SLOWCASE_OP(op_rshift) |
| DEFINE_SLOWCASE_OP(op_unsigned) |
| 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_string) |
| DEFINE_SLOWCASE_OP(op_to_primitive) |
| DEFINE_SLOWCASE_OP(op_has_indexed_property) |
| DEFINE_SLOWCASE_OP(op_has_structure_property) |
| DEFINE_SLOWCASE_OP(op_get_direct_pname) |
| |
| 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(); |
| } |
| |
| if (false) |
| dataLog("At ", firstTo, " slow: ", iter - m_slowCases.begin(), "\n"); |
| |
| 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 (shouldEmitProfiling()) |
| add32(TrustedImm32(1), AbsoluteAddress(&rareCaseProfile->m_counter)); |
| |
| emitJumpSlowToHot(jump(), 0); |
| } |
| |
| RELEASE_ASSERT(m_getByIdIndex == m_getByIds.size()); |
| RELEASE_ASSERT(m_putByIdIndex == m_putByIds.size()); |
| RELEASE_ASSERT(m_callLinkInfoIndex == m_callCompilationInfo.size()); |
| RELEASE_ASSERT(numberOfValueProfiles == m_codeBlock->numberOfValueProfiles()); |
| |
| #ifndef NDEBUG |
| // Reset this, in order to guard its use with ASSERTs. |
| m_bytecodeOffset = std::numeric_limits<unsigned>::max(); |
| #endif |
| } |
| |
| void JIT::compileWithoutLinking(JITCompilationEffort effort) |
| { |
| double before = 0; |
| if (UNLIKELY(computeCompileTimes())) |
| before = monotonicallyIncreasingTimeMS(); |
| |
| { |
| ConcurrentJITLocker locker(m_codeBlock->m_lock); |
| m_instructions = m_codeBlock->instructions().clone(); |
| } |
| |
| DFG::CapabilityLevel level = m_codeBlock->capabilityLevel(); |
| switch (level) { |
| case DFG::CannotCompile: |
| m_canBeOptimized = false; |
| m_canBeOptimizedOrInlined = false; |
| m_shouldEmitProfiling = false; |
| 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 ModuleCode: |
| 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; |
| } |
| |
| if (Options::dumpDisassembly() || (m_vm->m_perBytecodeProfiler && Options::disassembleBaselineForProfiler())) |
| m_disassembler = std::make_unique<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); |
| } |
| |
| m_pcToCodeOriginMapBuilder.appendItem(label(), CodeOrigin(0, nullptr)); |
| |
| if (m_disassembler) |
| m_disassembler->setStartOfCode(label()); |
| |
| // Just add a little bit of randomness to the codegen |
| if (m_randomGenerator.getUint32() & 1) |
| nop(); |
| |
| emitFunctionPrologue(); |
| emitPutToCallFrameHeader(m_codeBlock, CallFrameSlot::codeBlock); |
| |
| Label beginLabel(this); |
| |
| sampleCodeBlock(m_codeBlock); |
| #if ENABLE(OPCODE_SAMPLING) |
| sampleInstruction(m_codeBlock->instructions().begin()); |
| #endif |
| |
| if (m_codeBlock->codeType() == FunctionCode) { |
| ASSERT(m_bytecodeOffset == std::numeric_limits<unsigned>::max()); |
| 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)); |
| } |
| } |
| } |
| |
| addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, regT1); |
| Jump stackOverflow = branchPtr(Above, AbsoluteAddress(m_vm->addressOfSoftStackLimit()), regT1); |
| |
| move(regT1, stackPointerRegister); |
| checkStackPointerAlignment(); |
| |
| emitSaveCalleeSaves(); |
| emitMaterializeTagCheckRegisters(); |
| |
| RELEASE_ASSERT(!JITCode::isJIT(m_codeBlock->jitType())); |
| |
| privateCompileMainPass(); |
| privateCompileLinkPass(); |
| privateCompileSlowCases(); |
| |
| if (m_disassembler) |
| m_disassembler->setEndOfSlowPath(label()); |
| m_pcToCodeOriginMapBuilder.appendItem(label(), PCToCodeOriginMapBuilder::defaultCodeOrigin()); |
| |
| stackOverflow.link(this); |
| m_bytecodeOffset = 0; |
| if (maxFrameExtentForSlowPathCall) |
| addPtr(TrustedImm32(-maxFrameExtentForSlowPathCall), stackPointerRegister); |
| callOperationWithCallFrameRollbackOnException(operationThrowStackOverflowError, m_codeBlock); |
| |
| if (m_codeBlock->codeType() == FunctionCode) { |
| m_arityCheck = label(); |
| store8(TrustedImm32(0), &m_codeBlock->m_shouldAlwaysBeInlined); |
| emitFunctionPrologue(); |
| emitPutToCallFrameHeader(m_codeBlock, CallFrameSlot::codeBlock); |
| |
| load32(payloadFor(CallFrameSlot::argumentCount), regT1); |
| branch32(AboveOrEqual, regT1, TrustedImm32(m_codeBlock->m_numParameters)).linkTo(beginLabel, this); |
| |
| m_bytecodeOffset = 0; |
| |
| if (maxFrameExtentForSlowPathCall) |
| addPtr(TrustedImm32(-maxFrameExtentForSlowPathCall), stackPointerRegister); |
| callOperationWithCallFrameRollbackOnException(m_codeBlock->m_isConstructor ? operationConstructArityCheck : operationCallArityCheck); |
| if (maxFrameExtentForSlowPathCall) |
| addPtr(TrustedImm32(maxFrameExtentForSlowPathCall), stackPointerRegister); |
| branchTest32(Zero, returnValueGPR).linkTo(beginLabel, this); |
| move(returnValueGPR, GPRInfo::argumentGPR0); |
| emitNakedCall(m_vm->getCTIStub(arityFixupGenerator).code()); |
| |
| #if !ASSERT_DISABLED |
| m_bytecodeOffset = std::numeric_limits<unsigned>::max(); // 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()); |
| m_pcToCodeOriginMapBuilder.appendItem(label(), PCToCodeOriginMapBuilder::defaultCodeOrigin()); |
| |
| m_linkBuffer = std::unique_ptr<LinkBuffer>(new LinkBuffer(*m_vm, *this, m_codeBlock, effort)); |
| |
| double after = 0; |
| if (UNLIKELY(computeCompileTimes())) { |
| after = monotonicallyIncreasingTimeMS(); |
| |
| if (Options::reportTotalCompileTimes()) |
| totalBaselineCompileTime += after - before; |
| } |
| if (UNLIKELY(reportCompileTimes())) { |
| CString codeBlockName = toCString(*m_codeBlock); |
| |
| dataLog("Optimized ", codeBlockName, " with Baseline JIT into ", m_linkBuffer->size(), " bytes in ", after - before, " ms.\n"); |
| } |
| } |
| |
| CompilationResult JIT::link() |
| { |
| LinkBuffer& patchBuffer = *m_linkBuffer; |
| |
| 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)); |
| } |
| |
| for (unsigned i = m_getByIds.size(); i--;) |
| m_getByIds[i].finalize(patchBuffer); |
| for (unsigned i = m_putByIds.size(); i--;) |
| m_putByIds[i].finalize(patchBuffer); |
| |
| if (m_byValCompilationInfo.size()) { |
| CodeLocationLabel exceptionHandler = patchBuffer.locationOf(m_exceptionHandler); |
| |
| for (const auto& byValCompilationInfo : m_byValCompilationInfo) { |
| PatchableJump patchableNotIndexJump = byValCompilationInfo.notIndexJump; |
| CodeLocationJump notIndexJump = CodeLocationJump(); |
| if (Jump(patchableNotIndexJump).isSet()) |
| notIndexJump = CodeLocationJump(patchBuffer.locationOf(patchableNotIndexJump)); |
| CodeLocationJump badTypeJump = CodeLocationJump(patchBuffer.locationOf(byValCompilationInfo.badTypeJump)); |
| CodeLocationLabel doneTarget = patchBuffer.locationOf(byValCompilationInfo.doneTarget); |
| CodeLocationLabel nextHotPathTarget = patchBuffer.locationOf(byValCompilationInfo.nextHotPathTarget); |
| CodeLocationLabel slowPathTarget = patchBuffer.locationOf(byValCompilationInfo.slowPathTarget); |
| CodeLocationCall returnAddress = patchBuffer.locationOf(byValCompilationInfo.returnAddress); |
| |
| *byValCompilationInfo.byValInfo = ByValInfo( |
| byValCompilationInfo.bytecodeIndex, |
| notIndexJump, |
| badTypeJump, |
| exceptionHandler, |
| byValCompilationInfo.arrayMode, |
| byValCompilationInfo.arrayProfile, |
| differenceBetweenCodePtr(badTypeJump, doneTarget), |
| differenceBetweenCodePtr(badTypeJump, nextHotPathTarget), |
| differenceBetweenCodePtr(returnAddress, slowPathTarget)); |
| } |
| } |
| |
| for (unsigned i = 0; i < m_callCompilationInfo.size(); ++i) { |
| CallCompilationInfo& compilationInfo = m_callCompilationInfo[i]; |
| CallLinkInfo& info = *compilationInfo.callLinkInfo; |
| info.setCallLocations(patchBuffer.locationOfNearCall(compilationInfo.callReturnLocation), |
| patchBuffer.locationOf(compilationInfo.hotPathBegin), |
| patchBuffer.locationOfNearCall(compilationInfo.hotPathOther)); |
| } |
| |
| 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()); |
| |
| MacroAssemblerCodePtr withArityCheck; |
| if (m_codeBlock->codeType() == FunctionCode) |
| withArityCheck = patchBuffer.locationOf(m_arityCheck); |
| |
| if (Options::dumpDisassembly()) { |
| m_disassembler->dump(patchBuffer); |
| patchBuffer.didAlreadyDisassemble(); |
| } |
| if (m_compilation) { |
| if (Options::disassembleBaselineForProfiler()) |
| m_disassembler->reportToProfiler(m_compilation.get(), patchBuffer); |
| m_vm->m_perBytecodeProfiler->addCompilation(m_codeBlock, m_compilation); |
| } |
| |
| if (m_pcToCodeOriginMapBuilder.didBuildMapping()) |
| m_codeBlock->setPCToCodeOriginMap(std::make_unique<PCToCodeOriginMap>(WTFMove(m_pcToCodeOriginMapBuilder), patchBuffer)); |
| |
| CodeRef result = FINALIZE_CODE( |
| patchBuffer, |
| ("Baseline JIT code for %s", toCString(CodeBlockWithJITType(m_codeBlock, JITCode::BaselineJIT)).data())); |
| |
| m_vm->machineCodeBytesPerBytecodeWordForBaselineJIT->add( |
| static_cast<double>(result.size()) / |
| static_cast<double>(m_instructions.size())); |
| |
| m_codeBlock->shrinkToFit(CodeBlock::LateShrink); |
| m_codeBlock->setJITCode( |
| adoptRef(new DirectJITCode(result, withArityCheck, JITCode::BaselineJIT))); |
| |
| #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; |
| } |
| |
| CompilationResult JIT::privateCompile(JITCompilationEffort effort) |
| { |
| doMainThreadPreparationBeforeCompile(); |
| compileWithoutLinking(effort); |
| return link(); |
| } |
| |
| void JIT::privateCompileExceptionHandlers() |
| { |
| if (!m_exceptionChecksWithCallFrameRollback.empty()) { |
| m_exceptionChecksWithCallFrameRollback.link(this); |
| |
| copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(); |
| |
| // lookupExceptionHandlerFromCallerFrame is passed two arguments, the VM and the exec (the CallFrame*). |
| |
| move(TrustedImmPtr(vm()), GPRInfo::argumentGPR0); |
| move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR1); |
| |
| #if CPU(X86) |
| // FIXME: should use the call abstraction, but this is currently in the SpeculativeJIT layer! |
| poke(GPRInfo::argumentGPR0); |
| poke(GPRInfo::argumentGPR1, 1); |
| #endif |
| m_calls.append(CallRecord(call(), std::numeric_limits<unsigned>::max(), FunctionPtr(lookupExceptionHandlerFromCallerFrame).value())); |
| jumpToExceptionHandler(); |
| } |
| |
| if (!m_exceptionChecks.empty() || m_byValCompilationInfo.size()) { |
| m_exceptionHandler = label(); |
| m_exceptionChecks.link(this); |
| |
| copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(); |
| |
| // lookupExceptionHandler is passed two arguments, the VM and the exec (the CallFrame*). |
| move(TrustedImmPtr(vm()), GPRInfo::argumentGPR0); |
| move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR1); |
| |
| #if CPU(X86) |
| // FIXME: should use the call abstraction, but this is currently in the SpeculativeJIT layer! |
| poke(GPRInfo::argumentGPR0); |
| poke(GPRInfo::argumentGPR1, 1); |
| #endif |
| m_calls.append(CallRecord(call(), std::numeric_limits<unsigned>::max(), FunctionPtr(lookupExceptionHandler).value())); |
| jumpToExceptionHandler(); |
| } |
| } |
| |
| void JIT::doMainThreadPreparationBeforeCompile() |
| { |
| // This ensures that we have the most up to date type information when performing typecheck optimizations for op_profile_type. |
| if (m_vm->typeProfiler()) |
| m_vm->typeProfilerLog()->processLogEntries(ASCIILiteral("Preparing for JIT compilation.")); |
| } |
| |
| unsigned JIT::frameRegisterCountFor(CodeBlock* codeBlock) |
| { |
| ASSERT(static_cast<unsigned>(codeBlock->m_numCalleeLocals) == WTF::roundUpToMultipleOf(stackAlignmentRegisters(), static_cast<unsigned>(codeBlock->m_numCalleeLocals))); |
| |
| return roundLocalRegisterCountForFramePointerOffset(codeBlock->m_numCalleeLocals + maxFrameExtentForSlowPathCallInRegisters); |
| } |
| |
| int JIT::stackPointerOffsetFor(CodeBlock* codeBlock) |
| { |
| return virtualRegisterForLocal(frameRegisterCountFor(codeBlock) - 1).offset(); |
| } |
| |
| bool JIT::reportCompileTimes() |
| { |
| return Options::reportCompileTimes() || Options::reportBaselineCompileTimes(); |
| } |
| |
| bool JIT::computeCompileTimes() |
| { |
| return reportCompileTimes() || Options::reportTotalCompileTimes(); |
| } |
| |
| HashMap<CString, double> JIT::compileTimeStats() |
| { |
| HashMap<CString, double> result; |
| if (Options::reportTotalCompileTimes()) { |
| result.add("Total Compile Time", totalBaselineCompileTime + totalDFGCompileTime + totalFTLCompileTime); |
| result.add("Baseline Compile Time", totalBaselineCompileTime); |
| #if ENABLE(DFG_JIT) |
| result.add("DFG Compile Time", totalDFGCompileTime); |
| #if ENABLE(FTL_JIT) |
| result.add("FTL Compile Time", totalFTLCompileTime); |
| result.add("FTL (DFG) Compile Time", totalFTLDFGCompileTime); |
| result.add("FTL (B3) Compile Time", totalFTLB3CompileTime); |
| #endif // ENABLE(FTL_JIT) |
| #endif // ENABLE(DFG_JIT) |
| } |
| return result; |
| } |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(JIT) |
