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 "DFGJITCode.h"
  34 #include "DFGPlan.h"
  35 #include "DFGThunks.h"
  36 #include "DFGWorklist.h"
  37 #include "JITCode.h"
  38 #include "JSCInlines.h"
  39 #include "Options.h"
  40 #include "SamplingTool.h"
  41 #include <wtf/Atomics.h>
  42
  43 #if ENABLE(FTL_JIT)
  44 #include "FTLThunks.h"
  45 #endif
  46
  47 namespace JSC { namespace DFG {
  48
  49 static unsigned numCompilations;
  50
  51 unsigned getNumCompilations()
  52 {
  53     return numCompilations;
  54 }
  55
  56 #if ENABLE(DFG_JIT)
  57 static CompilationResult compileImpl(
  58     VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
  59     unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
  60     PassRefPtr<DeferredCompilationCallback> callback)
  61 {
  62     SamplingRegion samplingRegion("DFG Compilation (Driver)");
  63
  64     numCompilations++;
  65
  66     ASSERT(codeBlock);
  67     ASSERT(codeBlock->alternative());
  68     ASSERT(codeBlock->alternative()->jitType() == JITCode::BaselineJIT);
  69     ASSERT(!profiledDFGCodeBlock || profiledDFGCodeBlock->jitType() == JITCode::DFGJIT);
  70
  71     if (logCompilationChanges(mode))
  72         dataLog("DFG(Driver) compiling ", *codeBlock, " with ", mode, ", number of instructions = ", codeBlock->instructionCount(), "\n");
  73
  74     // Make sure that any stubs that the DFG is going to use are initialized. We want to
  75     // make sure that all JIT code generation does finalization on the main thread.
  76     vm.getCTIStub(osrExitGenerationThunkGenerator);
  77     vm.getCTIStub(throwExceptionFromCallSlowPathGenerator);
  78     if (mode == DFGMode) {
  79         vm.getCTIStub(linkCallThunkGenerator);
  80         vm.getCTIStub(linkConstructThunkGenerator);
  81         vm.getCTIStub(linkClosureCallThunkGenerator);
  82         vm.getCTIStub(virtualCallThunkGenerator);
  83         vm.getCTIStub(virtualConstructThunkGenerator);
  84     } else {
  85         vm.getCTIStub(linkCallThatPreservesRegsThunkGenerator);
  86         vm.getCTIStub(linkConstructThatPreservesRegsThunkGenerator);
  87         vm.getCTIStub(linkClosureCallThatPreservesRegsThunkGenerator);
  88         vm.getCTIStub(virtualCallThatPreservesRegsThunkGenerator);
  89         vm.getCTIStub(virtualConstructThatPreservesRegsThunkGenerator);
  90     }
  91
  92     RefPtr<Plan> plan = adoptRef(
  93         new Plan(codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
  94
  95     if (Options::enableConcurrentJIT()) {
  96         Worklist* worklist = ensureGlobalWorklistFor(mode);
  97         plan->callback = callback;
  98         if (logCompilationChanges(mode))
  99             dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist->queueLength(), ".\n");
 100         worklist->enqueue(plan);
 101         return CompilationDeferred;
 102     }
 103
 104     plan->compileInThread(*vm.dfgState, 0);
 105     return plan->finalizeWithoutNotifyingCallback();
 106 }
 107 #else // ENABLE(DFG_JIT)
 108 static CompilationResult compileImpl(
 109     VM&, CodeBlock*, CodeBlock*, CompilationMode, unsigned, const Operands<JSValue>&,
 110     PassRefPtr<DeferredCompilationCallback>)
 111 {
 112     return CompilationFailed;
 113 }
 114 #endif // ENABLE(DFG_JIT)
 115
 116 CompilationResult compile(
 117     VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
 118     unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
 119     PassRefPtr<DeferredCompilationCallback> passedCallback)
 120 {
 121     RefPtr<DeferredCompilationCallback> callback = passedCallback;
 122     CompilationResult result = compileImpl(
 123         vm, codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues,
 124         callback);
 125     if (result != CompilationDeferred)
 126         callback->compilationDidComplete(codeBlock, result);
 127     return result;
 128 }
 129
 130 } } // namespace JSC::DFG