1/*
2 * Copyright (C) 2008-2019 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "InitializeThreading.h"
31
32#include "DisallowVMReentry.h"
33#include "ExecutableAllocator.h"
34#include "Heap.h"
35#include "Identifier.h"
36#include "JSCPtrTag.h"
37#include "JSDateMath.h"
38#include "JSGlobalObject.h"
39#include "JSLock.h"
40#include "LLIntData.h"
41#include "MacroAssemblerCodeRef.h"
42#include "Options.h"
43#include "SigillCrashAnalyzer.h"
44#include "StructureIDTable.h"
45#include "SuperSampler.h"
46#include "WasmCapabilities.h"
47#include "WasmThunks.h"
48#include "WriteBarrier.h"
49#include <mutex>
50#include <wtf/MainThread.h>
51#include <wtf/Threading.h>
52#include <wtf/dtoa.h>
53#include <wtf/dtoa/cached-powers.h>
54
55namespace JSC {
56
57static_assert(sizeof(bool) == 1, "LLInt and JIT assume sizeof(bool) is always 1 when touching it directly from assembly code.");
58
59void initializeThreading()
60{
61 static std::once_flag initializeThreadingOnceFlag;
62
63 std::call_once(initializeThreadingOnceFlag, []{
64 WTF::initializeThreading();
65 Options::initialize();
66
67 initializePtrTagLookup();
68
69#if ENABLE(WRITE_BARRIER_PROFILING)
70 WriteBarrierCounters::initialize();
71#endif
72
73 ExecutableAllocator::initialize();
74 VM::computeCanUseJIT();
75
76 if (VM::canUseJIT() && Options::useSigillCrashAnalyzer())
77 enableSigillCrashAnalyzer();
78
79 LLInt::initialize();
80#ifndef NDEBUG
81 DisallowGC::initialize();
82 DisallowVMReentry::initialize();
83#endif
84 initializeSuperSampler();
85 Thread& thread = Thread::current();
86 thread.setSavedLastStackTop(thread.stack().origin());
87
88#if ENABLE(WEBASSEMBLY)
89 if (Wasm::isSupported())
90 Wasm::Thunks::initialize();
91#endif
92
93 if (VM::isInMiniMode())
94 WTF::fastEnableMiniMode();
95 });
96}
97
98} // namespace JSC
99