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Commit	Line	Data
	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