runtime/JSGlobalData.cpp

   1 /*
   2  * Copyright (C) 2008 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 Computer, 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 "JSGlobalData.h"
  31
  32 #include "ArgList.h"
  33 #include "Collector.h"
  34 #include "CommonIdentifiers.h"
  35 #include "FunctionConstructor.h"
  36 #include "GetterSetter.h"
  37 #include "Interpreter.h"
  38 #include "JSActivation.h"
  39 #include "JSAPIValueWrapper.h"
  40 #include "JSArray.h"
  41 #include "JSByteArray.h"
  42 #include "JSClassRef.h"
  43 #include "JSFunction.h"
  44 #include "JSLock.h"
  45 #include "JSNotAnObject.h"
  46 #include "JSPropertyNameIterator.h"
  47 #include "JSStaticScopeObject.h"
  48 #include "Lexer.h"
  49 #include "Lookup.h"
  50 #include "Nodes.h"
  51 #include "Parser.h"
  52 #include "RegExpCache.h"
  53 #include <wtf/WTFThreadData.h>
  54
  55 #if ENABLE(JSC_MULTIPLE_THREADS)
  56 #include <wtf/Threading.h>
  57 #endif
  58
  59 #if PLATFORM(MAC)
  60 #include "ProfilerServer.h"
  61 #include <CoreFoundation/CoreFoundation.h>
  62 #endif
  63
  64 using namespace WTF;
  65
  66 namespace JSC {
  67
  68 extern JSC_CONST_HASHTABLE HashTable arrayTable;
  69 extern JSC_CONST_HASHTABLE HashTable jsonTable;
  70 extern JSC_CONST_HASHTABLE HashTable dateTable;
  71 extern JSC_CONST_HASHTABLE HashTable mathTable;
  72 extern JSC_CONST_HASHTABLE HashTable numberTable;
  73 extern JSC_CONST_HASHTABLE HashTable regExpTable;
  74 extern JSC_CONST_HASHTABLE HashTable regExpConstructorTable;
  75 extern JSC_CONST_HASHTABLE HashTable stringTable;
  76
  77 void* JSGlobalData::jsArrayVPtr;
  78 void* JSGlobalData::jsByteArrayVPtr;
  79 void* JSGlobalData::jsStringVPtr;
  80 void* JSGlobalData::jsFunctionVPtr;
  81
  82 void JSGlobalData::storeVPtrs()
  83 {
  84     CollectorCell cell;
  85     void* storage = &cell;
  86
  87     COMPILE_ASSERT(sizeof(JSArray) <= sizeof(CollectorCell), sizeof_JSArray_must_be_less_than_CollectorCell);
  88     JSCell* jsArray = new (storage) JSArray(JSArray::createStructure(jsNull()));
  89     JSGlobalData::jsArrayVPtr = jsArray->vptr();
  90     jsArray->~JSCell();
  91
  92     COMPILE_ASSERT(sizeof(JSByteArray) <= sizeof(CollectorCell), sizeof_JSByteArray_must_be_less_than_CollectorCell);
  93     JSCell* jsByteArray = new (storage) JSByteArray(JSByteArray::VPtrStealingHack);
  94     JSGlobalData::jsByteArrayVPtr = jsByteArray->vptr();
  95     jsByteArray->~JSCell();
  96
  97     COMPILE_ASSERT(sizeof(JSString) <= sizeof(CollectorCell), sizeof_JSString_must_be_less_than_CollectorCell);
  98     JSCell* jsString = new (storage) JSString(JSString::VPtrStealingHack);
  99     JSGlobalData::jsStringVPtr = jsString->vptr();
 100     jsString->~JSCell();
 101
 102     COMPILE_ASSERT(sizeof(JSFunction) <= sizeof(CollectorCell), sizeof_JSFunction_must_be_less_than_CollectorCell);
 103     JSCell* jsFunction = new (storage) JSFunction(JSFunction::createStructure(jsNull()));
 104     JSGlobalData::jsFunctionVPtr = jsFunction->vptr();
 105     jsFunction->~JSCell();
 106 }
 107
 108 JSGlobalData::JSGlobalData(GlobalDataType globalDataType, ThreadStackType threadStackType)
 109     : globalDataType(globalDataType)
 110     , clientData(0)
 111     , arrayTable(fastNew<HashTable>(JSC::arrayTable))
 112     , dateTable(fastNew<HashTable>(JSC::dateTable))
 113     , jsonTable(fastNew<HashTable>(JSC::jsonTable))
 114     , mathTable(fastNew<HashTable>(JSC::mathTable))
 115     , numberTable(fastNew<HashTable>(JSC::numberTable))
 116     , regExpTable(fastNew<HashTable>(JSC::regExpTable))
 117     , regExpConstructorTable(fastNew<HashTable>(JSC::regExpConstructorTable))
 118     , stringTable(fastNew<HashTable>(JSC::stringTable))
 119     , activationStructure(JSActivation::createStructure(jsNull()))
 120     , interruptedExecutionErrorStructure(JSObject::createStructure(jsNull()))
 121     , terminatedExecutionErrorStructure(JSObject::createStructure(jsNull()))
 122     , staticScopeStructure(JSStaticScopeObject::createStructure(jsNull()))
 123     , stringStructure(JSString::createStructure(jsNull()))
 124     , notAnObjectErrorStubStructure(JSNotAnObjectErrorStub::createStructure(jsNull()))
 125     , notAnObjectStructure(JSNotAnObject::createStructure(jsNull()))
 126     , propertyNameIteratorStructure(JSPropertyNameIterator::createStructure(jsNull()))
 127     , getterSetterStructure(GetterSetter::createStructure(jsNull()))
 128     , apiWrapperStructure(JSAPIValueWrapper::createStructure(jsNull()))
 129     , dummyMarkableCellStructure(JSCell::createDummyStructure())
 130 #if USE(JSVALUE32)
 131     , numberStructure(JSNumberCell::createStructure(jsNull()))
 132 #endif
 133     , identifierTable(globalDataType == Default ? wtfThreadData().currentIdentifierTable() : createIdentifierTable())
 134     , propertyNames(new CommonIdentifiers(this))
 135     , emptyList(new MarkedArgumentBuffer)
 136     , lexer(new Lexer(this))
 137     , parser(new Parser)
 138     , interpreter(new Interpreter)
 139     , heap(this)
 140     , initializingLazyNumericCompareFunction(false)
 141     , head(0)
 142     , dynamicGlobalObject(0)
 143     , functionCodeBlockBeingReparsed(0)
 144     , firstStringifierToMark(0)
 145     , markStack(jsArrayVPtr)
 146     , cachedUTCOffset(NaN)
 147     , maxReentryDepth(threadStackType == ThreadStackTypeSmall ? MaxSmallThreadReentryDepth : MaxLargeThreadReentryDepth)
 148     , m_regExpCache(new RegExpCache(this))
 149 #ifndef NDEBUG
 150     , exclusiveThread(0)
 151 #endif
 152 {
 153 #if PLATFORM(MAC)
 154     startProfilerServerIfNeeded();
 155 #endif
 156 #if ENABLE(JIT) && ENABLE(INTERPRETER)
 157 #if PLATFORM(CF)
 158     CFStringRef canUseJITKey = CFStringCreateWithCString(0 , "JavaScriptCoreUseJIT", kCFStringEncodingMacRoman);
 159     CFBooleanRef canUseJIT = (CFBooleanRef)CFPreferencesCopyAppValue(canUseJITKey, kCFPreferencesCurrentApplication);
 160     if (canUseJIT) {
 161         m_canUseJIT = kCFBooleanTrue == canUseJIT;
 162         CFRelease(canUseJIT);
 163     } else
 164         m_canUseJIT = !getenv("JavaScriptCoreUseJIT");
 165     CFRelease(canUseJITKey);
 166 #elif OS(UNIX)
 167     m_canUseJIT = !getenv("JavaScriptCoreUseJIT");
 168 #else
 169     m_canUseJIT = true;
 170 #endif
 171 #endif
 172 #if ENABLE(JIT)
 173 #if ENABLE(INTERPRETER)
 174     if (m_canUseJIT)
 175         m_canUseJIT = executableAllocator.isValid();
 176 #endif
 177     jitStubs.set(new JITThunks(this));
 178 #endif
 179 }
 180
 181 JSGlobalData::~JSGlobalData()
 182 {
 183     // By the time this is destroyed, heap.destroy() must already have been called.
 184
 185     delete interpreter;
 186 #ifndef NDEBUG
 187     // Zeroing out to make the behavior more predictable when someone attempts to use a deleted instance.
 188     interpreter = 0;
 189 #endif
 190
 191     arrayTable->deleteTable();
 192     dateTable->deleteTable();
 193     jsonTable->deleteTable();
 194     mathTable->deleteTable();
 195     numberTable->deleteTable();
 196     regExpTable->deleteTable();
 197     regExpConstructorTable->deleteTable();
 198     stringTable->deleteTable();
 199
 200     fastDelete(const_cast<HashTable*>(arrayTable));
 201     fastDelete(const_cast<HashTable*>(dateTable));
 202     fastDelete(const_cast<HashTable*>(jsonTable));
 203     fastDelete(const_cast<HashTable*>(mathTable));
 204     fastDelete(const_cast<HashTable*>(numberTable));
 205     fastDelete(const_cast<HashTable*>(regExpTable));
 206     fastDelete(const_cast<HashTable*>(regExpConstructorTable));
 207     fastDelete(const_cast<HashTable*>(stringTable));
 208
 209     delete parser;
 210     delete lexer;
 211
 212     deleteAllValues(opaqueJSClassData);
 213
 214     delete emptyList;
 215
 216     delete propertyNames;
 217     if (globalDataType != Default)
 218         deleteIdentifierTable(identifierTable);
 219
 220     delete clientData;
 221     delete m_regExpCache;
 222 }
 223
 224 PassRefPtr<JSGlobalData> JSGlobalData::createContextGroup(ThreadStackType type)
 225 {
 226     return adoptRef(new JSGlobalData(APIContextGroup, type));
 227 }
 228
 229 PassRefPtr<JSGlobalData> JSGlobalData::create(ThreadStackType type)
 230 {
 231     return adoptRef(new JSGlobalData(Default, type));
 232 }
 233
 234 PassRefPtr<JSGlobalData> JSGlobalData::createLeaked(ThreadStackType type)
 235 {
 236     Structure::startIgnoringLeaks();
 237     RefPtr<JSGlobalData> data = create(type);
 238     Structure::stopIgnoringLeaks();
 239     return data.release();
 240 }
 241
 242 bool JSGlobalData::sharedInstanceExists()
 243 {
 244     return sharedInstanceInternal();
 245 }
 246
 247 JSGlobalData& JSGlobalData::sharedInstance()
 248 {
 249     JSGlobalData*& instance = sharedInstanceInternal();
 250     if (!instance) {
 251         instance = new JSGlobalData(APIShared, ThreadStackTypeSmall);
 252 #if ENABLE(JSC_MULTIPLE_THREADS)
 253         instance->makeUsableFromMultipleThreads();
 254 #endif
 255     }
 256     return *instance;
 257 }
 258
 259 JSGlobalData*& JSGlobalData::sharedInstanceInternal()
 260 {
 261     ASSERT(JSLock::currentThreadIsHoldingLock());
 262     static JSGlobalData* sharedInstance;
 263     return sharedInstance;
 264 }
 265
 266 // FIXME: We can also detect forms like v1 < v2 ? -1 : 0, reverse comparison, etc.
 267 const Vector<Instruction>& JSGlobalData::numericCompareFunction(ExecState* exec)
 268 {
 269     if (!lazyNumericCompareFunction.size() && !initializingLazyNumericCompareFunction) {
 270         initializingLazyNumericCompareFunction = true;
 271         RefPtr<FunctionExecutable> function = FunctionExecutable::fromGlobalCode(Identifier(exec, "numericCompare"), exec, 0, makeSource(UString("(function (v1, v2) { return v1 - v2; })")), 0, 0);
 272         lazyNumericCompareFunction = function->bytecode(exec, exec->scopeChain()).instructions();
 273         initializingLazyNumericCompareFunction = false;
 274     }
 275
 276     return lazyNumericCompareFunction;
 277 }
 278
 279 JSGlobalData::ClientData::~ClientData()
 280 {
 281 }
 282
 283 void JSGlobalData::resetDateCache()
 284 {
 285     cachedUTCOffset = NaN;
 286     dstOffsetCache.reset();
 287     cachedDateString = UString();
 288     dateInstanceCache.reset();
 289 }
 290
 291 void JSGlobalData::startSampling()
 292 {
 293     interpreter->startSampling();
 294 }
 295
 296 void JSGlobalData::stopSampling()
 297 {
 298     interpreter->stopSampling();
 299 }
 300
 301 void JSGlobalData::dumpSampleData(ExecState* exec)
 302 {
 303     interpreter->dumpSampleData(exec);
 304 }
 305
 306 } // namespace JSC