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
47namespace JSC { namespace DFG {
48
49static unsigned numCompilations;
50
51unsigned getNumCompilations()
52{
53    return numCompilations;
54}
55
56#if ENABLE(DFG_JIT)
57static 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)
108static 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
116CompilationResult 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
131