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/*
* Copyright (C) 2011-2014, 2016 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 "DFGJITCode.h"
#include "DFGPlan.h"
#include "DFGThunks.h"
#include "DFGWorklist.h"
#include "FunctionWhitelist.h"
#include "JITCode.h"
#include "JSCInlines.h"
#include "Options.h"
#include "TypeProfilerLog.h"
#include <wtf/Atomics.h>
#include <wtf/NeverDestroyed.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 FunctionWhitelist& ensureGlobalDFGWhitelist()
{
static LazyNeverDestroyed<FunctionWhitelist> dfgWhitelist;
static std::once_flag initializeWhitelistFlag;
std::call_once(initializeWhitelistFlag, [] {
const char* functionWhitelistFile = Options::dfgWhitelist();
dfgWhitelist.construct(functionWhitelistFile);
});
return dfgWhitelist;
}
static CompilationResult compileImpl(
VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
Ref<DeferredCompilationCallback>&& callback)
{
if (!Options::bytecodeRangeToDFGCompile().isInRange(codeBlock->instructionCount())
|| !ensureGlobalDFGWhitelist().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."));
Ref<Plan> plan = adoptRef(
*new Plan(codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
plan->callback = WTFMove(callback);
if (Options::useConcurrentJIT()) {
Worklist& worklist = ensureGlobalWorklistFor(mode);
if (logCompilationChanges(mode))
dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist.queueLength(), ".\n");
worklist.enqueue(WTFMove(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>&,
Ref<DeferredCompilationCallback>&&)
{
return CompilationFailed;
}
#endif // ENABLE(DFG_JIT)
CompilationResult compile(
VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
unsigned osrEntryBytecodeIndex, const Operands<JSValue>& mustHandleValues,
Ref<DeferredCompilationCallback>&& callback)
{
CompilationResult result = compileImpl(
vm, codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues,
callback.copyRef());
if (result != CompilationDeferred)
callback->compilationDidComplete(codeBlock, profiledDFGCodeBlock, result);
return result;
}
} } // namespace JSC::DFG
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