1/*
2 * Copyright (C) 2011-2017 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 "FunctionWhitelist.h"
38#include "JITCode.h"
39#include "JSCInlines.h"
40#include "Options.h"
41#include "ThunkGenerators.h"
42#include "TypeProfilerLog.h"
43#include <wtf/Atomics.h>
44#include <wtf/NeverDestroyed.h>
45
46#if ENABLE(FTL_JIT)
47#include "FTLThunks.h"
48#endif
49
50namespace JSC { namespace DFG {
51
52static unsigned numCompilations;
53
54unsigned getNumCompilations()
55{
56 return numCompilations;
57}
58
59#if ENABLE(DFG_JIT)
60static FunctionWhitelist& ensureGlobalDFGWhitelist()
61{
62 static LazyNeverDestroyed<FunctionWhitelist> dfgWhitelist;
63 static std::once_flag initializeWhitelistFlag;
64 std::call_once(initializeWhitelistFlag, [] {
65 const char* functionWhitelistFile = Options::dfgWhitelist();
66 dfgWhitelist.construct(functionWhitelistFile);
67 });
68 return dfgWhitelist;
69}
70
71static CompilationResult compileImpl(
72 VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
73 BytecodeIndex osrEntryBytecodeIndex, const Operands<Optional<JSValue>>& mustHandleValues,
74 Ref<DeferredCompilationCallback>&& callback)
75{
76 if (!Options::bytecodeRangeToDFGCompile().isInRange(codeBlock->instructionsSize())
77 || !ensureGlobalDFGWhitelist().contains(codeBlock))
78 return CompilationFailed;
79
80 numCompilations++;
81
82 ASSERT(codeBlock);
83 ASSERT(codeBlock->alternative());
84 ASSERT(codeBlock->alternative()->jitType() == JITType::BaselineJIT);
85 ASSERT(!profiledDFGCodeBlock || profiledDFGCodeBlock->jitType() == JITType::DFGJIT);
86
87 if (logCompilationChanges(mode))
88 dataLog("DFG(Driver) compiling ", *codeBlock, " with ", mode, ", instructions size = ", codeBlock->instructionsSize(), "\n");
89
90 // Make sure that any stubs that the DFG is going to use are initialized. We want to
91 // make sure that all JIT code generation does finalization on the main thread.
92 vm.getCTIStub(arityFixupGenerator);
93 vm.getCTIStub(osrExitThunkGenerator);
94 vm.getCTIStub(osrExitGenerationThunkGenerator);
95 vm.getCTIStub(throwExceptionFromCallSlowPathGenerator);
96 vm.getCTIStub(linkCallThunkGenerator);
97 vm.getCTIStub(linkPolymorphicCallThunkGenerator);
98
99 if (vm.typeProfiler())
100 vm.typeProfilerLog()->processLogEntries(vm, "Preparing for DFG compilation."_s);
101
102 Ref<Plan> plan = adoptRef(
103 *new Plan(codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues));
104
105 plan->setCallback(WTFMove(callback));
106 if (Options::useConcurrentJIT()) {
107 Worklist& worklist = ensureGlobalWorklistFor(mode);
108 if (logCompilationChanges(mode))
109 dataLog("Deferring DFG compilation of ", *codeBlock, " with queue length ", worklist.queueLength(), ".\n");
110 worklist.enqueue(WTFMove(plan));
111 return CompilationDeferred;
112 }
113
114 plan->compileInThread(nullptr);
115 return plan->finalizeWithoutNotifyingCallback();
116}
117#else // ENABLE(DFG_JIT)
118static CompilationResult compileImpl(
119 VM&, CodeBlock*, CodeBlock*, CompilationMode, BytecodeIndex, const Operands<Optional<JSValue>>&,
120 Ref<DeferredCompilationCallback>&&)
121{
122 return CompilationFailed;
123}
124#endif // ENABLE(DFG_JIT)
125
126CompilationResult compile(
127 VM& vm, CodeBlock* codeBlock, CodeBlock* profiledDFGCodeBlock, CompilationMode mode,
128 BytecodeIndex osrEntryBytecodeIndex, const Operands<Optional<JSValue>>& mustHandleValues,
129 Ref<DeferredCompilationCallback>&& callback)
130{
131 CompilationResult result = compileImpl(
132 vm, codeBlock, profiledDFGCodeBlock, mode, osrEntryBytecodeIndex, mustHandleValues,
133 callback.copyRef());
134 if (result != CompilationDeferred)
135 callback->compilationDidComplete(codeBlock, profiledDFGCodeBlock, result);
136 return result;
137}
138
139} } // namespace JSC::DFG
140