dfg/DFGDriver.cpp

   1 /*
   2  * Copyright (C) 2011, 2012, 2013, 2014 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "DFGDriver.h"
  28
  29 #include "JSObject.h"
  30 #include "JSString.h"
  31
  32 #include "CodeBlock.h"
  33 #include "DFGFunctionWhitelist.h"
  34 #include "DFGJITCode.h"
  35 #include "DFGPlan.h"
  36 #include "DFGThunks.h"
  37 #include "DFGWorklist.h"
  38 #include "JITCode.h"
  39 #include "JSCInlines.h"
  40 #include "Options.h"
  41 #include "SamplingTool.h"
  42 #include "TypeProfilerLog.h"
  43 #include <wtf/Atomics.h>
  44
  45 #if ENABLE(FTL_JIT)
  46 #include "FTLThunks.h"
  47 #endif
  48
  49 namespace JSC { namespace DFG {
  50
  51 static unsigned numCompilations;
  52
  53 unsigned getNumCompilations()
  54 {
  55     return numCompilations;
  56 }
  57
  58 #if ENABLE(DFG_JIT)
  59 static CompilationResult compileImpl(
  60     VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
  61     unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
  62     PassRefPtr<DeferredCompilationCallback> callback)
  63 {
  64     SamplingRegion samplingRegion("DFG Compilation (Driver)");
  65
  66     if (!Options::bytecodeRangeToDFGCompile().isInRange(codeBlock->instructionCount())
  67         || !FunctionWhitelist::ensureGlobalWhitelist().contains(codeBlock))
  68         return CompilationFailed;
  69
  70     numCompilations++;
  71
  72     ASSERT(codeBlock);
  73     ASSERT(codeBlock->alternative());
  74     ASSERT(codeBlock->alternative()->jitType() == JITCode::BaselineJIT);
  75     ASSERT(!profiledDFGCodeBlock || profiledDFGCodeBlock->jitType() == JITCode::DFGJIT);
  76
  77     if (logCompilationChanges(mode))
  78         dataLog("DFG(Driver) compiling ", *codeBlock, " with ", mode, ", number of instructions = ", codeBlock->instructionCount(), "\n");
  79
  80     // Make sure that any stubs that the DFG is going to use are initialized. We want to
  81     // make sure that all JIT code generation does finalization on the main thread.
  82     vm.getCTIStub(osrExitGenerationThunkGenerator);
  83     vm.getCTIStub(throwExceptionFromCallSlowPathGenerator);
  84     if (mode == DFGMode) {
  85         vm.getCTIStub(linkCallThunkGenerator);
  86         vm.getCTIStub(linkConstructThunkGenerator);
  87         vm.getCTIStub(linkPolymorphicCallThunkGenerator);
  88         vm.getCTIStub(virtualCallThunkGenerator);
  89         vm.getCTIStub(virtualConstructThunkGenerator);
  90     } else {
  91         vm.getCTIStub(linkCallThatPreservesRegsThunkGenerator);
  92         vm.getCTIStub(linkConstructThatPreservesRegsThunkGenerator);
  93         vm.getCTIStub(linkPolymorphicCallThatPreservesRegsThunkGenerator);
  94         vm.getCTIStub(virtualCallThatPreservesRegsThunkGenerator);
  95         vm.getCTIStub(virtualConstructThatPreservesRegsThunkGenerator);
  96     }
  97
  98     if (vm.typeProfiler())
  99         vm.typeProfilerLog()->processLogEntries(ASCIILiteral("Preparing for DFG compilation."));
 100
 101     RefPtr<Plan> plan = adoptRef(
 102         new Plan(codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
 103
 104     plan->callback = callback;
 105     if (Options::enableConcurrentJIT()) {
 106         Worklist* worklist = ensureGlobalWorklistFor(mode);
 107         if (logCompilationChanges(mode))
 108             dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist->queueLength(), ".\n");
 109         worklist->enqueue(plan);
 110         return CompilationDeferred;
 111     }
 112
 113     plan->compileInThread(*vm.dfgState, 0);
 114     return plan->finalizeWithoutNotifyingCallback();
 115 }
 116 #else // ENABLE(DFG_JIT)
 117 static CompilationResult compileImpl(
 118     VM&, CodeBlock*, CodeBlock*, CompilationMode, unsigned, const Operands<JSValue>&,
 119     PassRefPtr<DeferredCompilationCallback>)
 120 {
 121     return CompilationFailed;
 122 }
 123 #endif // ENABLE(DFG_JIT)
 124
 125 CompilationResult compile(
 126     VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
 127     unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
 128     PassRefPtr<DeferredCompilationCallback> passedCallback)
 129 {
 130     RefPtr<DeferredCompilationCallback> callback = passedCallback;
 131     CompilationResult result = compileImpl(
 132         vm, codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues,
 133         callback);
 134     if (result != CompilationDeferred)
 135         callback->compilationDidComplete(codeBlock, result);
 136     return result;
 137 }
 138
 139 } } // namespace JSC::DFG