DFGDriver.cpp 4.54 KB
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/*
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 * Copyright (C) 2011, 2012, 2013 Apple Inc. All rights reserved.
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 *
 * 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"

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#include "JSObject.h"
#include "JSString.h"
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#include "CodeBlock.h"
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#include "DFGJITCode.h"
#include "DFGPlan.h"
#include "DFGThunks.h"
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#include "DFGWorklist.h"
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#include "JITCode.h"
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#include "Operations.h"
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#include "Options.h"
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#include "SamplingTool.h"
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#include <wtf/Atomics.h>
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#if ENABLE(FTL_JIT)
#include "FTLThunks.h"
#endif

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namespace JSC { namespace DFG {

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static unsigned numCompilations;

unsigned getNumCompilations()
{
    return numCompilations;
}

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#if ENABLE(DFG_JIT)
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static CompilationResult compileImpl(
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    VM& vm, CodeBlock* codeBlock, CompilationMode mode, unsigned osrEntryBytecodeIndex,
    const Operands<JSValue>& mustHandleValues,
    PassRefPtr<DeferredCompilationCallback> callback, Worklist* worklist)
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{
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    SamplingRegion samplingRegion("DFG Compilation (Driver)");
    
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    numCompilations++;
    
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    ASSERT(codeBlock);
    ASSERT(codeBlock->alternative());
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    ASSERT(codeBlock->alternative()->jitType() == JITCode::BaselineJIT);
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    if (!Options::useDFGJIT() || !MacroAssembler::supportsFloatingPoint())
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        return CompilationFailed;
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    if (!Options::bytecodeRangeToDFGCompile().isInRange(codeBlock->instructionCount()))
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        return CompilationFailed;
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    if (logCompilationChanges())
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        dataLog("DFG(Driver) compiling ", *codeBlock, " with ", mode, ", number of instructions = ", codeBlock->instructionCount(), "\n");
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    // Make sure that any stubs that the DFG is going to use are initialized. We want to
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    // make sure that all JIT code generation does finalization on the main thread.
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    vm.getCTIStub(osrExitGenerationThunkGenerator);
    vm.getCTIStub(throwExceptionFromCallSlowPathGenerator);
    vm.getCTIStub(linkCallThunkGenerator);
    vm.getCTIStub(linkConstructThunkGenerator);
    vm.getCTIStub(linkClosureCallThunkGenerator);
    vm.getCTIStub(virtualCallThunkGenerator);
    vm.getCTIStub(virtualConstructThunkGenerator);
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    RefPtr<Plan> plan = adoptRef(
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        new Plan(codeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
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    if (worklist) {
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        plan->callback = callback;
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        if (logCompilationChanges())
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            dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist->queueLength(), ".\n");
        worklist->enqueue(plan);
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        return CompilationDeferred;
    }
    
    plan->compileInThread(*vm.dfgState);
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    return plan->finalizeWithoutNotifyingCallback();
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}
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#else // ENABLE(DFG_JIT)
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static CompilationResult compileImpl(
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    VM&, CodeBlock*, CompilationMode, unsigned, const Operands<JSValue>&,
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    PassRefPtr<DeferredCompilationCallback>, Worklist*)
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{
    return CompilationFailed;
}
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#endif // ENABLE(DFG_JIT)

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CompilationResult compile(
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    VM& vm, CodeBlock* codeBlock, CompilationMode mode, unsigned osrEntryBytecodeIndex,
    const Operands<JSValue>& mustHandleValues,
    PassRefPtr<DeferredCompilationCallback> passedCallback, Worklist* worklist)
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{
    RefPtr<DeferredCompilationCallback> callback = passedCallback;
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    CompilationResult result = compileImpl(
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        vm, codeBlock, mode, osrEntryBytecodeIndex, mustHandleValues, callback, worklist);
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    if (result != CompilationDeferred)
        callback->compilationDidComplete(codeBlock, result);
    return result;
}

} } // namespace JSC::DFG