webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 128 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGDriver.cpp b/Source/JavaScriptCore/dfg/DFGDriver.cpp
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+++ b/Source/JavaScriptCore/dfg/DFGDriver.cpp
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+/*
+ * Copyright (C) 2011, 2012, 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 "DFGDriver.h"
+
+#include "JSObject.h"
+#include "JSString.h"
+
+#include "CodeBlock.h"
+#include "DFGFunctionWhitelist.h"
+#include "DFGJITCode.h"
+#include "DFGPlan.h"
+#include "DFGThunks.h"
+#include "DFGWorklist.h"
+#include "JITCode.h"
+#include "JSCInlines.h"
+#include "Options.h"
+#include "SamplingTool.h"
+#include "TypeProfilerLog.h"
+#include <wtf/Atomics.h>
+
+#if ENABLE(FTL_JIT)
+#include "FTLThunks.h"
+#endif
+
+namespace JSC { namespace DFG {
+
+static unsigned numCompilations;
+
+unsigned getNumCompilations()
+{
+    return numCompilations;
+}
+
+#if ENABLE(DFG_JIT)
+static CompilationResult compileImpl(
+    VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
+    unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
+    PassRefPtr<DeferredCompilationCallback> callback)
+{
+    SamplingRegion samplingRegion("DFG Compilation (Driver)");
+    
+    if (!Options::bytecodeRangeToDFGCompile().isInRange(codeBlock->instructionCount())
+        || !FunctionWhitelist::ensureGlobalWhitelist().contains(codeBlock))
+        return CompilationFailed;
+    
+    numCompilations++;
+    
+    ASSERT(codeBlock);
+    ASSERT(codeBlock->alternative());
+    ASSERT(codeBlock->alternative()->jitType() == JITCode::BaselineJIT);
+    ASSERT(!profiledDFGCodeBlock || profiledDFGCodeBlock->jitType() == JITCode::DFGJIT);
+    
+    if (logCompilationChanges(mode))
+        dataLog("DFG(Driver) compiling ", *codeBlock, " with ", mode, ", number of instructions = ", codeBlock->instructionCount(), "\n");
+    
+    // Make sure that any stubs that the DFG is going to use are initialized. We want to
+    // make sure that all JIT code generation does finalization on the main thread.
+    vm.getCTIStub(osrExitGenerationThunkGenerator);
+    vm.getCTIStub(throwExceptionFromCallSlowPathGenerator);
+    vm.getCTIStub(linkCallThunkGenerator);
+    vm.getCTIStub(linkPolymorphicCallThunkGenerator);
+    
+    if (vm.typeProfiler())
+        vm.typeProfilerLog()->processLogEntries(ASCIILiteral("Preparing for DFG compilation."));
+    
+    RefPtr<Plan> plan = adoptRef(
+        new Plan(codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
+    
+    plan->callback = callback;
+    if (Options::enableConcurrentJIT()) {
+        Worklist* worklist = ensureGlobalWorklistFor(mode);
+        if (logCompilationChanges(mode))
+            dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist->queueLength(), ".\n");
+        worklist->enqueue(plan);
+        return CompilationDeferred;
+    }
+    
+    plan->compileInThread(*vm.dfgState, 0);
+    return plan->finalizeWithoutNotifyingCallback();
+}
+#else // ENABLE(DFG_JIT)
+static CompilationResult compileImpl(
+    VM&, CodeBlock*, CodeBlock*, CompilationMode, unsigned, const Operands<JSValue>&,
+    PassRefPtr<DeferredCompilationCallback>)
+{
+    return CompilationFailed;
+}
+#endif // ENABLE(DFG_JIT)
+
+CompilationResult compile(
+    VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
+    unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
+    PassRefPtr<DeferredCompilationCallback> passedCallback)
+{
+    RefPtr<DeferredCompilationCallback> callback = passedCallback;
+    CompilationResult result = compileImpl(
+        vm, codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues,
+        callback);
+    if (result != CompilationDeferred)
+        callback->compilationDidComplete(codeBlock, result);
+    return result;
+}
+
+} } // namespace JSC::DFG