| /* |
| * Copyright (C) 2013-2018 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" |
| #include "FTLLink.h" |
| |
| #if ENABLE(FTL_JIT) |
| |
| #include "CCallHelpers.h" |
| #include "CodeBlockWithJITType.h" |
| #include "DFGCommon.h" |
| #include "FTLJITCode.h" |
| #include "JITOperations.h" |
| #include "LinkBuffer.h" |
| #include "JSCInlines.h" |
| #include "ProfilerCompilation.h" |
| #include "ThunkGenerators.h" |
| #include "VirtualRegister.h" |
| |
| namespace JSC { namespace FTL { |
| |
| void link(State& state) |
| { |
| using namespace DFG; |
| Graph& graph = state.graph; |
| CodeBlock* codeBlock = graph.m_codeBlock; |
| VM& vm = graph.m_vm; |
| |
| // B3 will create its own jump tables as needed. |
| codeBlock->clearSwitchJumpTables(); |
| |
| state.jitCode->common.requiredRegisterCountForExit = graph.requiredRegisterCountForExit(); |
| |
| if (!graph.m_plan.inlineCallFrames->isEmpty()) |
| state.jitCode->common.inlineCallFrames = graph.m_plan.inlineCallFrames; |
| |
| graph.registerFrozenValues(); |
| |
| // Create the entrypoint. Note that we use this entrypoint totally differently |
| // depending on whether we're doing OSR entry or not. |
| CCallHelpers jit(codeBlock); |
| |
| std::unique_ptr<LinkBuffer> linkBuffer; |
| |
| CCallHelpers::Address frame = CCallHelpers::Address( |
| CCallHelpers::stackPointerRegister, -static_cast<int32_t>(AssemblyHelpers::prologueStackPointerDelta())); |
| |
| Profiler::Compilation* compilation = graph.compilation(); |
| if (UNLIKELY(compilation)) { |
| compilation->addDescription( |
| Profiler::OriginStack(), |
| toCString("Generated FTL JIT code for ", CodeBlockWithJITType(codeBlock, JITCode::FTLJIT), ", instruction count = ", graph.m_codeBlock->instructionCount(), ":\n")); |
| |
| graph.ensureSSADominators(); |
| graph.ensureSSANaturalLoops(); |
| |
| const char* prefix = " "; |
| |
| DumpContext dumpContext; |
| StringPrintStream out; |
| Node* lastNode = 0; |
| for (size_t blockIndex = 0; blockIndex < graph.numBlocks(); ++blockIndex) { |
| BasicBlock* block = graph.block(blockIndex); |
| if (!block) |
| continue; |
| |
| graph.dumpBlockHeader(out, prefix, block, Graph::DumpLivePhisOnly, &dumpContext); |
| compilation->addDescription(Profiler::OriginStack(), out.toCString()); |
| out.reset(); |
| |
| for (size_t nodeIndex = 0; nodeIndex < block->size(); ++nodeIndex) { |
| Node* node = block->at(nodeIndex); |
| |
| Profiler::OriginStack stack; |
| |
| if (node->origin.semantic.isSet()) { |
| stack = Profiler::OriginStack( |
| *vm.m_perBytecodeProfiler, codeBlock, node->origin.semantic); |
| } |
| |
| if (graph.dumpCodeOrigin(out, prefix, lastNode, node, &dumpContext)) { |
| compilation->addDescription(stack, out.toCString()); |
| out.reset(); |
| } |
| |
| graph.dump(out, prefix, node, &dumpContext); |
| compilation->addDescription(stack, out.toCString()); |
| out.reset(); |
| |
| if (node->origin.semantic.isSet()) |
| lastNode = node; |
| } |
| } |
| |
| dumpContext.dump(out, prefix); |
| compilation->addDescription(Profiler::OriginStack(), out.toCString()); |
| out.reset(); |
| |
| out.print(" Disassembly:\n"); |
| out.print(" <not implemented yet>\n"); |
| compilation->addDescription(Profiler::OriginStack(), out.toCString()); |
| out.reset(); |
| |
| state.jitCode->common.compilation = compilation; |
| } |
| |
| switch (graph.m_plan.mode) { |
| case FTLMode: { |
| if (codeBlock->codeType() == FunctionCode) { |
| CCallHelpers::JumpList mainPathJumps; |
| |
| jit.load32( |
| frame.withOffset(sizeof(Register) * CallFrameSlot::argumentCount), |
| GPRInfo::regT1); |
| mainPathJumps.append(jit.branch32( |
| CCallHelpers::AboveOrEqual, GPRInfo::regT1, |
| CCallHelpers::TrustedImm32(codeBlock->numParameters()))); |
| jit.emitFunctionPrologue(); |
| jit.move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0); |
| jit.storePtr(GPRInfo::callFrameRegister, &vm.topCallFrame); |
| CCallHelpers::Call callArityCheck = jit.call(OperationPtrTag); |
| |
| auto noException = jit.branch32(CCallHelpers::GreaterThanOrEqual, GPRInfo::returnValueGPR, CCallHelpers::TrustedImm32(0)); |
| jit.copyCalleeSavesToEntryFrameCalleeSavesBuffer(vm.topEntryFrame); |
| jit.move(CCallHelpers::TrustedImmPtr(&vm), GPRInfo::argumentGPR0); |
| jit.move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR1); |
| CCallHelpers::Call callLookupExceptionHandlerFromCallerFrame = jit.call(OperationPtrTag); |
| jit.jumpToExceptionHandler(vm); |
| noException.link(&jit); |
| |
| if (!ASSERT_DISABLED) { |
| jit.load64(vm.addressOfException(), GPRInfo::regT1); |
| jit.jitAssertIsNull(GPRInfo::regT1); |
| } |
| |
| jit.move(GPRInfo::returnValueGPR, GPRInfo::argumentGPR0); |
| jit.emitFunctionEpilogue(); |
| jit.untagReturnAddress(); |
| mainPathJumps.append(jit.branchTest32(CCallHelpers::Zero, GPRInfo::argumentGPR0)); |
| jit.emitFunctionPrologue(); |
| CCallHelpers::Call callArityFixup = jit.nearCall(); |
| jit.emitFunctionEpilogue(); |
| jit.untagReturnAddress(); |
| mainPathJumps.append(jit.jump()); |
| |
| linkBuffer = std::make_unique<LinkBuffer>(jit, codeBlock, JITCompilationCanFail); |
| if (linkBuffer->didFailToAllocate()) { |
| state.allocationFailed = true; |
| return; |
| } |
| linkBuffer->link(callArityCheck, FunctionPtr<OperationPtrTag>(codeBlock->m_isConstructor ? operationConstructArityCheck : operationCallArityCheck)); |
| linkBuffer->link(callLookupExceptionHandlerFromCallerFrame, FunctionPtr<OperationPtrTag>(lookupExceptionHandlerFromCallerFrame)); |
| linkBuffer->link(callArityFixup, FunctionPtr<JITThunkPtrTag>(vm.getCTIStub(arityFixupGenerator).code())); |
| linkBuffer->link(mainPathJumps, state.generatedFunction); |
| } |
| |
| state.jitCode->initializeAddressForCall(state.generatedFunction); |
| break; |
| } |
| |
| case FTLForOSREntryMode: { |
| // We jump to here straight from DFG code, after having boxed up all of the |
| // values into the scratch buffer. Everything should be good to go - at this |
| // point we've even done the stack check. Basically we just have to make the |
| // call to the B3-generated code. |
| CCallHelpers::Label start = jit.label(); |
| jit.emitFunctionEpilogue(); |
| jit.untagReturnAddress(); |
| CCallHelpers::Jump mainPathJump = jit.jump(); |
| |
| linkBuffer = std::make_unique<LinkBuffer>(jit, codeBlock, JITCompilationCanFail); |
| if (linkBuffer->didFailToAllocate()) { |
| state.allocationFailed = true; |
| return; |
| } |
| linkBuffer->link(mainPathJump, state.generatedFunction); |
| |
| state.jitCode->initializeAddressForCall(linkBuffer->locationOf<JSEntryPtrTag>(start)); |
| break; |
| } |
| |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| break; |
| } |
| |
| state.finalizer->entrypointLinkBuffer = WTFMove(linkBuffer); |
| state.finalizer->function = state.generatedFunction; |
| state.finalizer->jitCode = state.jitCode; |
| } |
| |
| } } // namespace JSC::FTL |
| |
| #endif // ENABLE(FTL_JIT) |
| |
