JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / ftl / FTLJITFinalizer.cpp

diff --git a/ftl/FTLJITFinalizer.cpp b/ftl/FTLJITFinalizer.cpp
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+/*
+ * 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 "FTLJITFinalizer.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "CodeBlockWithJITType.h"
+#include "DFGPlan.h"
+#include "FTLThunks.h"
+#include "ProfilerDatabase.h"
+
+namespace JSC { namespace FTL {
+
+using namespace DFG;
+
+JITFinalizer::JITFinalizer(Plan& plan)
+    : Finalizer(plan)
+{
+}
+
+JITFinalizer::~JITFinalizer()
+{
+}
+
+size_t JITFinalizer::codeSize()
+{
+    size_t result = 0;
+    
+    if (exitThunksLinkBuffer)
+        result += exitThunksLinkBuffer->size();
+    if (entrypointLinkBuffer)
+        result += entrypointLinkBuffer->size();
+    if (sideCodeLinkBuffer)
+        result += sideCodeLinkBuffer->size();
+    if (handleExceptionsLinkBuffer)
+        result += handleExceptionsLinkBuffer->size();
+    
+    for (unsigned i = jitCode->handles().size(); i--;)
+        result += jitCode->handles()[i]->sizeInBytes();
+    
+    return result;
+}
+
+bool JITFinalizer::finalize()
+{
+    RELEASE_ASSERT_NOT_REACHED();
+    return false;
+}
+
+bool JITFinalizer::finalizeFunction()
+{
+    for (unsigned i = jitCode->handles().size(); i--;) {
+        MacroAssembler::cacheFlush(
+            jitCode->handles()[i]->start(), jitCode->handles()[i]->sizeInBytes());
+    }
+    
+    if (exitThunksLinkBuffer) {
+        StackMaps::RecordMap recordMap = jitCode->stackmaps.computeRecordMap();
+        
+        for (unsigned i = 0; i < osrExit.size(); ++i) {
+            OSRExitCompilationInfo& info = osrExit[i];
+            OSRExit& exit = jitCode->osrExit[i];
+            StackMaps::RecordMap::iterator iter = recordMap.find(exit.m_stackmapID);
+            if (iter == recordMap.end()) {
+                // It's OK, it was optimized out.
+                continue;
+            }
+            
+            exitThunksLinkBuffer->link(
+                info.m_thunkJump,
+                CodeLocationLabel(
+                    m_plan.vm.getCTIStub(osrExitGenerationThunkGenerator).code()));
+        }
+        
+        jitCode->initializeExitThunks(
+            FINALIZE_DFG_CODE(
+                *exitThunksLinkBuffer,
+                ("FTL exit thunks for %s", toCString(CodeBlockWithJITType(m_plan.codeBlock.get(), JITCode::FTLJIT)).data())));
+    } // else this function had no OSR exits, so no exit thunks.
+    
+    if (sideCodeLinkBuffer) {
+        // Side code is for special slow paths that we generate ourselves, like for inline
+        // caches.
+        
+        for (unsigned i = slowPathCalls.size(); i--;) {
+            SlowPathCall& call = slowPathCalls[i];
+            sideCodeLinkBuffer->link(
+                call.call(),
+                CodeLocationLabel(m_plan.vm.ftlThunks->getSlowPathCallThunk(m_plan.vm, call.key()).code()));
+        }
+        
+        jitCode->addHandle(FINALIZE_DFG_CODE(
+            *sideCodeLinkBuffer,
+            ("FTL side code for %s",
+                toCString(CodeBlockWithJITType(m_plan.codeBlock.get(), JITCode::FTLJIT)).data()))
+            .executableMemory());
+    }
+    
+    if (handleExceptionsLinkBuffer) {
+        jitCode->addHandle(FINALIZE_DFG_CODE(
+            *handleExceptionsLinkBuffer,
+            ("FTL exception handler for %s",
+                toCString(CodeBlockWithJITType(m_plan.codeBlock.get(), JITCode::FTLJIT)).data()))
+            .executableMemory());
+    }
+    
+    jitCode->initializeArityCheckEntrypoint(
+        FINALIZE_DFG_CODE(
+            *entrypointLinkBuffer,
+            ("FTL entrypoint thunk for %s with LLVM generated code at %p", toCString(CodeBlockWithJITType(m_plan.codeBlock.get(), JITCode::FTLJIT)).data(), function)));
+    
+    m_plan.codeBlock->setJITCode(jitCode);
+
+    m_plan.vm.updateFTLLargestStackSize(jitCode->stackmaps.stackSize());
+
+    if (m_plan.compilation)
+        m_plan.vm.m_perBytecodeProfiler->addCompilation(m_plan.compilation);
+    
+    return true;
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+