X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/4be4e30906bcb8ee30b4d189205cb70bad6707ce..81345200c95645a1b0d2635520f96ad55dfde63f:/ftl/FTLLink.cpp

diff --git a/ftl/FTLLink.cpp b/ftl/FTLLink.cpp
new file mode 100644
index 0000000..d23cece
--- /dev/null
+++ b/ftl/FTLLink.cpp
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2013, 2014 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 "ArityCheckFailReturnThunks.h"
+#include "CCallHelpers.h"
+#include "CodeBlockWithJITType.h"
+#include "DFGCommon.h"
+#include "FTLJITCode.h"
+#include "JITOperations.h"
+#include "JITStubs.h"
+#include "LLVMAPI.h"
+#include "LinkBuffer.h"
+#include "JSCInlines.h"
+#include "ProfilerCompilation.h"
+#include "VirtualRegister.h"
+
+namespace JSC { namespace FTL {
+
+using namespace DFG;
+
+void link(State& state)
+{
+    Graph& graph = state.graph;
+    CodeBlock* codeBlock = graph.m_codeBlock;
+    VM& vm = graph.m_vm;
+    
+    // LLVM will create its own jump tables as needed.
+    codeBlock->clearSwitchJumpTables();
+    
+    // FIXME: Need to know the real frame register count.
+    // https://bugs.webkit.org/show_bug.cgi?id=125727
+    state.jitCode->common.frameRegisterCount = 1000;
+    
+    state.jitCode->common.requiredRegisterCountForExit = graph.requiredRegisterCountForExit();
+    
+    if (!graph.m_plan.inlineCallFrames->isEmpty())
+        state.jitCode->common.inlineCallFrames = graph.m_plan.inlineCallFrames;
+    
+    // Create the entrypoint. Note that we use this entrypoint totally differently
+    // depending on whether we're doing OSR entry or not.
+    CCallHelpers jit(&vm, codeBlock);
+    
+    OwnPtr<LinkBuffer> linkBuffer;
+
+    CCallHelpers::Address frame = CCallHelpers::Address(
+        CCallHelpers::stackPointerRegister, -static_cast<int32_t>(AssemblyHelpers::prologueStackPointerDelta()));
+    
+    if (Profiler::Compilation* compilation = graph.compilation()) {
+        compilation->addDescription(
+            Profiler::OriginStack(),
+            toCString("Generated FTL JIT code for ", CodeBlockWithJITType(codeBlock, JITCode::FTLJIT), ", instruction count = ", graph.m_codeBlock->instructionCount(), ":\n"));
+        
+        graph.m_dominators.computeIfNecessary(graph);
+        graph.m_naturalLoops.computeIfNecessary(graph);
+        
+        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);
+                if (!node->willHaveCodeGenOrOSR() && !Options::showAllDFGNodes())
+                    continue;
+                
+                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");
+        for (unsigned i = 0; i < state.jitCode->handles().size(); ++i) {
+            if (state.codeSectionNames[i] != "__text")
+                continue;
+            
+                ExecutableMemoryHandle* handle = state.jitCode->handles()[i].get();
+                disassemble(
+                    MacroAssemblerCodePtr(handle->start()), handle->sizeInBytes(),
+                    "      ", out, LLVMSubset);
+        }
+        compilation->addDescription(Profiler::OriginStack(), out.toCString());
+        out.reset();
+        
+        state.jitCode->common.compilation = compilation;
+    }
+    
+    switch (graph.m_plan.mode) {
+    case FTLMode: {
+        CCallHelpers::JumpList mainPathJumps;
+    
+        jit.load32(
+            frame.withOffset(sizeof(Register) * JSStack::ArgumentCount),
+            GPRInfo::regT1);
+        mainPathJumps.append(jit.branch32(
+            CCallHelpers::AboveOrEqual, GPRInfo::regT1,
+            CCallHelpers::TrustedImm32(codeBlock->numParameters())));
+        jit.emitFunctionPrologue();
+        jit.move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0);
+        jit.store32(
+            CCallHelpers::TrustedImm32(CallFrame::Location::encodeAsBytecodeOffset(0)),
+            CCallHelpers::tagFor(JSStack::ArgumentCount));
+        jit.storePtr(GPRInfo::callFrameRegister, &vm.topCallFrame);
+        CCallHelpers::Call callArityCheck = jit.call();
+#if !ASSERT_DISABLED
+        // FIXME: need to make this call register with exception handling somehow. This is
+        // part of a bigger problem: FTL should be able to handle exceptions.
+        // https://bugs.webkit.org/show_bug.cgi?id=113622
+        // Until then, use a JIT ASSERT.
+        jit.load64(vm.addressOfException(), GPRInfo::regT1);
+        jit.jitAssertIsNull(GPRInfo::regT1);
+#endif
+        jit.move(GPRInfo::returnValueGPR, GPRInfo::regT0);
+        jit.emitFunctionEpilogue();
+        mainPathJumps.append(jit.branchTest32(CCallHelpers::Zero, GPRInfo::regT0));
+        jit.emitFunctionPrologue();
+        jit.move(CCallHelpers::TrustedImmPtr(vm.arityCheckFailReturnThunks->returnPCsFor(vm, codeBlock->numParameters())), GPRInfo::regT7);
+        jit.loadPtr(CCallHelpers::BaseIndex(GPRInfo::regT7, GPRInfo::regT0, CCallHelpers::timesPtr()), GPRInfo::regT7);
+        CCallHelpers::Call callArityFixup = jit.call();
+        jit.emitFunctionEpilogue();
+        mainPathJumps.append(jit.jump());
+
+        linkBuffer = adoptPtr(new LinkBuffer(vm, jit, codeBlock, JITCompilationMustSucceed));
+        linkBuffer->link(callArityCheck, codeBlock->m_isConstructor ? operationConstructArityCheck : operationCallArityCheck);
+        linkBuffer->link(callArityFixup, FunctionPtr((vm.getCTIStub(arityFixup)).code().executableAddress()));
+        linkBuffer->link(mainPathJumps, CodeLocationLabel(bitwise_cast<void*>(state.generatedFunction)));
+
+        state.jitCode->initializeAddressForCall(MacroAssemblerCodePtr(bitwise_cast<void*>(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 LLVM-generated code.
+        CCallHelpers::Label start = jit.label();
+        jit.emitFunctionEpilogue();
+        CCallHelpers::Jump mainPathJump = jit.jump();
+        
+        linkBuffer = adoptPtr(new LinkBuffer(vm, jit, codeBlock, JITCompilationMustSucceed));
+        linkBuffer->link(mainPathJump, CodeLocationLabel(bitwise_cast<void*>(state.generatedFunction)));
+
+        state.jitCode->initializeAddressForCall(linkBuffer->locationOf(start));
+        break;
+    }
+        
+    default:
+        RELEASE_ASSERT_NOT_REACHED();
+        break;
+    }
+    
+    state.finalizer->entrypointLinkBuffer = linkBuffer.release();
+    state.finalizer->function = state.generatedFunction;
+    state.finalizer->jitCode = state.jitCode;
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+