void CodeGenWorkItem::OnAddToJitQueue()
{
Assert(!this->isInJitQueue);
this->isInJitQueue = true;
VerifyJitMode();
this->entryPointInfo->SetCodeGenQueued();
if(IS_JS_ETW(EventEnabledJSCRIPT_FUNCTION_JIT_QUEUED()))
{
WCHAR displayNameBuffer[256];
WCHAR* displayName = displayNameBuffer;
size_t sizeInChars = this->GetDisplayName(displayName, 256);
if(sizeInChars > 256)
{
displayName = HeapNewArray(WCHAR, sizeInChars);
this->GetDisplayName(displayName, 256);
}
JS_ETW(EventWriteJSCRIPT_FUNCTION_JIT_QUEUED(
this->GetFunctionNumber(),
displayName,
this->GetScriptContext(),
this->GetInterpretedCount()));
if(displayName != displayNameBuffer)
{
HeapDeleteArray(sizeInChars, displayName);
}
}
}
SourceDynamicProfileManager *
SourceDynamicProfileManager::LoadFromDynamicProfileStorage(SourceContextInfo* info, ScriptContext* scriptContext, IActiveScriptDataCache* profileDataCache)
{
SourceDynamicProfileManager* manager = nullptr;
Recycler* recycler = scriptContext->GetRecycler();
#ifdef DYNAMIC_PROFILE_STORAGE
if(DynamicProfileStorage::IsEnabled() && info->url != nullptr)
{
manager = DynamicProfileStorage::Load(info->url, [recycler](char const * buffer, uint length) -> SourceDynamicProfileManager *
{
BufferReader reader(buffer, length);
return SourceDynamicProfileManager::Deserialize(&reader, recycler);
});
}
#endif
if(manager == nullptr)
{
manager = RecyclerNew(recycler, SourceDynamicProfileManager, recycler);
}
if(profileDataCache != nullptr)
{
bool profileLoaded = manager->LoadFromProfileCache(profileDataCache, info->url);
if(profileLoaded)
{
JS_ETW(EventWriteJSCRIPT_PROFILE_LOAD(info->dwHostSourceContext, scriptContext));
}
}
return manager;
}
void CodeGenWorkItem::OnRemoveFromJitQueue(NativeCodeGenerator* generator)
{
// This is called from within the lock
this->isInJitQueue = false;
this->entryPointInfo->SetCodeGenPending();
functionBody->GetScriptContext()->GetThreadContext()->UnregisterCodeGenRecyclableData(this->recyclableData);
this->recyclableData = nullptr;
if(IS_JS_ETW(EventEnabledJSCRIPT_FUNCTION_JIT_DEQUEUED()))
{
WCHAR displayNameBuffer[256];
WCHAR* displayName = displayNameBuffer;
size_t sizeInChars = this->GetDisplayName(displayName, 256);
if(sizeInChars > 256)
{
displayName = HeapNewArray(WCHAR, sizeInChars);
this->GetDisplayName(displayName, 256);
}
JS_ETW(EventWriteJSCRIPT_FUNCTION_JIT_DEQUEUED(
this->GetFunctionNumber(),
displayName,
this->GetScriptContext(),
this->GetInterpretedCount()));
if(displayName != displayNameBuffer)
{
HeapDeleteArray(sizeInChars, displayName);
}
}
if(this->Type() == JsLoopBodyWorkItemType)
{
// Go ahead and delete it and let it re-queue if more interpreting of the loop happens
auto loopBodyWorkItem = static_cast<JsLoopBodyCodeGen*>(this);
loopBodyWorkItem->loopHeader->ResetInterpreterCount();
loopBodyWorkItem->GetEntryPoint()->Reset();
HeapDelete(loopBodyWorkItem);
}
else
{
Assert(GetJitMode() == ExecutionMode::FullJit); // simple JIT work items are not removed from the queue
GetFunctionBody()->OnFullJitDequeued(static_cast<Js::FunctionEntryPointInfo *>(GetEntryPoint()));
// Add it back to the list of available functions to be jitted
generator->AddWorkItem(this);
}
}
Var JavascriptExternalFunction::FinishExternalCall(Var result)
{
ScriptContext * scriptContext = this->type->GetScriptContext();
if ( NULL == result )
{
result = scriptContext->GetLibrary()->GetUndefined();
}
else
{
result = CrossSite::MarshalVar(scriptContext, result);
}
if (IS_JS_ETW(EventEnabledJSCRIPT_HOSTING_EXTERNAL_FUNCTION_CALL_STOP()))
{
JS_ETW(EventWriteJSCRIPT_HOSTING_EXTERNAL_FUNCTION_CALL_STOP(scriptContext, this, 0));
}
return result;
}
JavascriptGeneratorFunction* JavascriptGeneratorFunction::OP_NewScGenFunc(FrameDisplay *environment, FunctionProxy** proxyRef)
{
FunctionProxy* functionProxy = *proxyRef;
ScriptContext* scriptContext = functionProxy->GetScriptContext();
bool hasSuperReference = functionProxy->HasSuperReference();
GeneratorVirtualScriptFunction* scriptFunction = scriptContext->GetLibrary()->CreateGeneratorVirtualScriptFunction(functionProxy);
scriptFunction->SetEnvironment(environment);
scriptFunction->SetHasSuperReference(hasSuperReference);
JS_ETW(EventWriteJSCRIPT_RECYCLER_ALLOCATE_FUNCTION(scriptFunction, EtwTrace::GetFunctionId(functionProxy)));
JavascriptGeneratorFunction* genFunc = scriptContext->GetLibrary()->CreateGeneratorFunction(functionInfo.GetOriginalEntryPoint(), scriptFunction);
scriptFunction->SetRealGeneratorFunction(genFunc);
return genFunc;
}
void JavascriptExternalFunction::PrepareExternalCall(Js::Arguments * args)
{
ScriptContext * scriptContext = this->type->GetScriptContext();
Assert(!scriptContext->GetThreadContext()->IsDisableImplicitException());
scriptContext->VerifyAlive();
Assert(scriptContext->GetThreadContext()->IsScriptActive());
if (args->Info.Count == 0)
{
JavascriptError::ThrowTypeError(scriptContext, JSERR_This_NullOrUndefined);
}
Var &thisVar = args->Values[0];
Js::TypeId typeId = Js::JavascriptOperators::GetTypeId(thisVar);
this->callCount++;
if (IS_JS_ETW(EventEnabledJSCRIPT_HOSTING_EXTERNAL_FUNCTION_CALL_START()))
{
JavascriptFunction* caller = nullptr;
// Lot the caller function if the call count of the external function pass certain threshold (randomly pick 256)
// we don't want to call stackwalk too often. The threshold can be adjusted as needed.
if (callCount >= ETW_MIN_COUNT_FOR_CALLER && ((callCount % ETW_MIN_COUNT_FOR_CALLER) == 0))
{
Js::JavascriptStackWalker stackWalker(scriptContext);
bool foundScriptCaller = false;
while(stackWalker.GetCaller(&caller))
{
if(caller != nullptr && Js::ScriptFunction::Is(caller))
{
foundScriptCaller = true;
break;
}
}
if(foundScriptCaller)
{
Var sourceString = caller->EnsureSourceString();
Assert(JavascriptString::Is(sourceString));
const char16* callerString = Js::JavascriptString::FromVar(sourceString)->GetSz();
char16* outString = (char16*)callerString;
int length = 0;
if (wcschr(callerString, _u('\n')) != NULL || wcschr(callerString, _u('\n')) != NULL)
{
length = Js::JavascriptString::FromVar(sourceString)->GetLength();
outString = HeapNewArray(char16, length+1);
int j = 0;
for (int i = 0; i < length; i++)
{
if (callerString[i] != _u('\n') && callerString[i] != L'\r')
{
outString[j++] = callerString[i];
}
}
outString[j] = L'\0';
}
JS_ETW(EventWriteJSCRIPT_HOSTING_CALLER_TO_EXTERNAL(scriptContext, this, typeId, outString, callCount));
if (outString != callerString)
{
HeapDeleteArray(length+1, outString);
}
#if DBG_DUMP
if (Js::Configuration::Global.flags.Trace.IsEnabled(Js::HostPhase))
{
Output::Print(_u("Large number of Call to trampoline: methodAddr= %p, Object typeid= %d, caller method= %s, callcount= %d\n"),
this, typeId, callerString, callCount);
}
#endif
}
}
JS_ETW(EventWriteJSCRIPT_HOSTING_EXTERNAL_FUNCTION_CALL_START(scriptContext, this, typeId));
#if DBG_DUMP
if (Js::Configuration::Global.flags.Trace.IsEnabled(Js::HostPhase))
{
Output::Print(_u("Call to trampoline: methodAddr= %p, Object typeid= %d\n"), this, typeId);
}
#endif
}
Js::RecyclableObject* directHostObject = nullptr;
switch(typeId)
{
case TypeIds_Integer:
#if FLOATVAR
case TypeIds_Number:
#endif // FLOATVAR
Assert(!Js::RecyclableObject::Is(thisVar));
break;
default:
{
Assert(Js::RecyclableObject::Is(thisVar));
ScriptContext* scriptContextThisVar = Js::RecyclableObject::FromVar(thisVar)->GetScriptContext();
// We need to verify "this" pointer is active as well. The problem is that DOM prototype functions are
// the same across multiple frames, and caller can do function.call(closedthis)
Assert(!scriptContext->GetThreadContext()->IsDisableImplicitException());
scriptContextThisVar->VerifyAlive();
// translate direct host for fastDOM.
switch(typeId)
{
case Js::TypeIds_GlobalObject:
{
Js::GlobalObject* srcGlobalObject = static_cast<Js::GlobalObject*>(thisVar);
directHostObject = srcGlobalObject->GetDirectHostObject();
// For jsrt, direct host object can be null. If thats the case don't change it.
if (directHostObject != nullptr)
{
thisVar = directHostObject;
}
}
break;
case Js::TypeIds_Undefined:
case Js::TypeIds_Null:
{
// Call to DOM function with this as "undefined" or "null"
// This should be converted to Global object
Js::GlobalObject* srcGlobalObject = scriptContextThisVar->GetGlobalObject() ;
directHostObject = srcGlobalObject->GetDirectHostObject();
// For jsrt, direct host object can be null. If thats the case don't change it.
if (directHostObject != nullptr)
{
thisVar = directHostObject;
}
}
break;
}
}
break;
}
}
void* AsmJsEncoder::Encode( FunctionBody* functionBody )
{
Assert( functionBody );
mFunctionBody = functionBody;
#if DBG_DUMP
AsmJsJitTemplate::Globals::CurrentEncodingFunction = mFunctionBody;
#endif
AsmJsFunctionInfo* asmInfo = functionBody->GetAsmJsFunctionInfo();
FunctionEntryPointInfo* entryPointInfo = ((FunctionEntryPointInfo*)(functionBody->GetDefaultEntryPointInfo()));
// number of var on the stack + ebp + eip
mIntOffset = asmInfo->GetIntByteOffset() + GetOffset<Var>();
mDoubleOffset = asmInfo->GetDoubleByteOffset() + GetOffset<Var>();
mFloatOffset = asmInfo->GetFloatByteOffset() + GetOffset<Var>();
mSimdOffset = asmInfo->GetSimdByteOffset() + GetOffset<Var>();
NoRecoverMemoryArenaAllocator localAlloc(_u("BE-AsmJsEncoder"), GetPageAllocator(), Js::Throw::OutOfMemory);
mLocalAlloc = &localAlloc;
mRelocLabelMap = Anew( mLocalAlloc, RelocLabelMap, mLocalAlloc );
mTemplateData = AsmJsJitTemplate::InitTemplateData();
mEncodeBufferSize = GetEncodeBufferSize(functionBody);
mEncodeBuffer = AnewArray((&localAlloc), BYTE, mEncodeBufferSize);
mPc = mEncodeBuffer;
mReader.Create( functionBody );
ip = mReader.GetIP();
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
if( PHASE_TRACE( Js::AsmjsEncoderPhase, mFunctionBody ) )
{
Output::Print( _u("\n\n") );
functionBody->DumpFullFunctionName();
Output::Print( _u("\n StackSize = %d , Offsets: Var = %d, Int = %d, Double = %d\n"), mFunctionBody->GetAsmJsFunctionInfo()->GetTotalSizeinBytes(), GetOffset<Var>(), GetOffset<int>(), GetOffset<double>() );
}
#endif
AsmJsJitTemplate::FunctionEntry::ApplyTemplate( this, mPc );
while( ReadOp() ){}
AsmJsJitTemplate::FunctionExit::ApplyTemplate( this, mPc );
AsmJsJitTemplate::FreeTemplateData( mTemplateData );
#if DBG_DUMP
AsmJsJitTemplate::Globals::CurrentEncodingFunction = nullptr;
#endif
ApplyRelocs();
ptrdiff_t codeSize = mPc - mEncodeBuffer;
if( codeSize > 0 )
{
Assert( ::Math::FitsInDWord( codeSize ) );
BYTE *buffer;
EmitBufferAllocation *allocation = GetCodeGenAllocator()->emitBufferManager.AllocateBuffer( codeSize, &buffer, 0, 0 );
functionBody->GetAsmJsFunctionInfo()->mTJBeginAddress = buffer;
if (buffer == nullptr)
{
Js::Throw::OutOfMemory();
}
if (!GetCodeGenAllocator()->emitBufferManager.CommitBuffer(allocation, buffer, codeSize, mEncodeBuffer))
{
Js::Throw::OutOfMemory();
}
functionBody->GetScriptContext()->GetThreadContext()->SetValidCallTargetForCFG(buffer);
// TODO: improve this once EntryPoint cleanup work is complete!
#if 0
const char16 *const functionName = functionBody->GetDisplayName();
const char16 *const suffix = _u("TJ");
char16 functionNameArray[256];
const size_t functionNameCharLength = functionBody->GetDisplayNameLength();
wcscpy_s(functionNameArray, 256, functionName);
wcscpy_s(&functionNameArray[functionNameCharLength], 256 - functionNameCharLength, suffix);
#endif
JS_ETW(EventWriteMethodLoad(functionBody->GetScriptContext(),
(void *)buffer,
codeSize,
EtwTrace::GetFunctionId(functionBody),
0 /* methodFlags - for future use*/,
MethodType_Jit,
EtwTrace::GetSourceId(functionBody),
functionBody->GetLineNumber(),
functionBody->GetColumnNumber(),
functionBody->GetDisplayName()));
entryPointInfo->SetTJCodeGenDone(); // set the codegen to done state for TJ
entryPointInfo->SetCodeSize(codeSize);
return buffer;
}
return nullptr;
}
void BackgroundJobProcessor::Run(ParallelThreadData* threadData)
{
JS_ETW(EventWriteJSCRIPT_NATIVECODEGEN_START(this, 0));
ArenaAllocator threadArena(_u("ThreadArena"), threadData->GetPageAllocator(), Js::Throw::OutOfMemory);
threadData->threadArena = &threadArena;
{
// Make sure we take decommit action before the threadArena is torn down, in case the
// thread context goes away and the loop exits.
struct AutoDecommit
{
AutoDecommit(JobProcessor *proc, ParallelThreadData *data) : processor(proc), threadData(data) {}
~AutoDecommit()
{
processor->ForEachManager([this](JobManager *manager){
manager->OnDecommit(this->threadData);
});
}
ParallelThreadData *threadData;
JobProcessor *processor;
} autoDecommit(this, threadData);
criticalSection.Enter();
while (!IsClosed() || (jobs.Head() && jobs.Head()->IsCritical()))
{
Job *job = jobs.UnlinkFromBeginning();
if(!job)
{
// No jobs in queue, wait for one
Assert(!IsClosed());
Assert(!threadData->isWaitingForJobs);
threadData->isWaitingForJobs = true;
criticalSection.Leave();
JS_ETW(EventWriteJSCRIPT_NATIVECODEGEN_STOP(this, 0));
if (threadService->HasCallback())
{
// We have a thread service, so simply return the thread back now.
// When new jobs are submitted, we will be called to process again.
return;
}
WaitForJobReadyOrShutdown(threadData);
JS_ETW(EventWriteJSCRIPT_NATIVECODEGEN_START(this, 0));
criticalSection.Enter();
threadData->isWaitingForJobs = false;
continue;
}
Assert(numJobs != 0);
--numJobs;
threadData->currentJob = job;
criticalSection.Leave();
const bool succeeded = Process(job, threadData);
criticalSection.Enter();
threadData->currentJob = 0;
JobManager *const manager = job->Manager();
JobProcessed(manager, job, succeeded); // the job may be deleted during this and should not be used afterwards
Assert(manager->numJobsAddedToProcessor != 0);
--manager->numJobsAddedToProcessor;
if(manager->isWaitable)
{
WaitableJobManager *const waitableManager = static_cast<WaitableJobManager *>(manager);
Assert(!(waitableManager->jobBeingWaitedUpon && waitableManager->isWaitingForQueuedJobs));
if(waitableManager->jobBeingWaitedUpon == job)
{
waitableManager->jobBeingWaitedUpon = 0;
waitableManager->jobBeingWaitedUponProcessed.Set();
}
else if(waitableManager->isWaitingForQueuedJobs && manager->numJobsAddedToProcessor == 0)
{
waitableManager->isWaitingForQueuedJobs = false;
waitableManager->queuedJobsProcessed.Set();
}
}
if(manager->numJobsAddedToProcessor == 0)
LastJobProcessed(manager); // the manager may be deleted during this and should not be used afterwards
}
criticalSection.Leave();
JS_ETW(EventWriteJSCRIPT_NATIVECODEGEN_STOP(this, 0));
}
}
Js::Var JSONParser::ParseObject()
{
PROBE_STACK(scriptContext, Js::Constants::MinStackDefault);
Js::Var retVal;
switch (m_token.tk)
{
case tkFltCon:
retVal = Js::JavascriptNumber::ToVarIntCheck(m_token.GetDouble(), scriptContext);
Scan();
return retVal;
case tkStrCon:
{
// will auto-null-terminate the string (as length=len+1)
uint len = m_scanner.GetCurrentStringLen();
retVal = Js::JavascriptString::NewCopyBuffer(m_scanner.GetCurrentString(), len, scriptContext);
Scan();
return retVal;
}
case tkTRUE:
retVal = scriptContext->GetLibrary()->GetTrue();
Scan();
return retVal;
case tkFALSE:
retVal = scriptContext->GetLibrary()->GetFalse();
Scan();
return retVal;
case tkNULL:
retVal = scriptContext->GetLibrary()->GetNull();
Scan();
return retVal;
case tkSub: // unary minus
if (Scan() == tkFltCon)
{
retVal = Js::JavascriptNumber::ToVarIntCheck(-m_token.GetDouble(), scriptContext);
Scan();
return retVal;
}
else
{
m_scanner.ThrowSyntaxError(JSERR_JsonBadNumber);
}
case tkLBrack:
{
Js::JavascriptArray* arrayObj = scriptContext->GetLibrary()->CreateArray(0);
//skip '['
Scan();
//iterate over the array members, get JSON objects and add them in the pArrayMemberList
uint k = 0;
while (true)
{
if(tkRBrack == m_token.tk)
{
break;
}
Js::Var value = ParseObject();
arrayObj->SetItem(k++, value, Js::PropertyOperation_None);
// if next token is not a comma consider the end of the array member list.
if (tkComma != m_token.tk)
break;
Scan();
if(tkRBrack == m_token.tk)
{
m_scanner.ThrowSyntaxError(JSERR_JsonIllegalChar);
}
}
//check and consume the ending ']'
CheckCurrentToken(tkRBrack, JSERR_JsonNoRbrack);
return arrayObj;
}
case tkLCurly:
{
// Parse an object, "{"name1" : ObjMember1, "name2" : ObjMember2, ...} "
if(IsCaching())
{
if(!typeCacheList)
{
typeCacheList = Anew(this->arenaAllocator, JsonTypeCacheList, this->arenaAllocator, 8);
}
}
// first, create the object
Js::DynamicObject* object = scriptContext->GetLibrary()->CreateObject();
JS_ETW(EventWriteJSCRIPT_RECYCLER_ALLOCATE_OBJECT(object));
#if ENABLE_DEBUG_CONFIG_OPTIONS
if (Js::Configuration::Global.flags.IsEnabled(Js::autoProxyFlag))
{
object = DynamicObject::FromVar(JavascriptProxy::AutoProxyWrapper(object));
}
#endif
//next token after '{'
Scan();
//if empty object "{}" return;
if(tkRCurly == m_token.tk)
{
Scan();
return object;
}
JsonTypeCache* previousCache = nullptr;
JsonTypeCache* currentCache = nullptr;
//parse the list of members
while(true)
{
// parse a list member: "name" : ObjMember
// and add it to the object.
//pick "name"
if(tkStrCon != m_token.tk)
{
m_scanner.ThrowSyntaxError(JSERR_JsonIllegalChar);
}
// currentStrLength = length w/o null-termination
WCHAR* currentStr = m_scanner.GetCurrentString();
uint currentStrLength = m_scanner.GetCurrentStringLen();
DynamicType* typeWithoutProperty = object->GetDynamicType();
if(IsCaching())
{
if(!previousCache)
{
// This is the first property in the list - see if we have an existing cache for it.
currentCache = typeCacheList->LookupWithKey(Js::HashedCharacterBuffer<WCHAR>(currentStr, currentStrLength), nullptr);
}
if(currentCache && currentCache->typeWithoutProperty == typeWithoutProperty &&
currentCache->propertyRecord->Equals(JsUtil::CharacterBuffer<WCHAR>(currentStr, currentStrLength)))
{
//check and consume ":"
if(Scan() != tkColon )
{
m_scanner.ThrowSyntaxError(JSERR_JsonNoColon);
}
Scan();
// Cache all values from currentCache as there is a chance that ParseObject might change the cache
DynamicType* typeWithProperty = currentCache->typeWithProperty;
PropertyId propertyId = currentCache->propertyRecord->GetPropertyId();
PropertyIndex propertyIndex = currentCache->propertyIndex;
previousCache = currentCache;
currentCache = currentCache->next;
// fast path for type transition and property set
object->EnsureSlots(typeWithoutProperty->GetTypeHandler()->GetSlotCapacity(),
typeWithProperty->GetTypeHandler()->GetSlotCapacity(), scriptContext, typeWithProperty->GetTypeHandler());
object->ReplaceType(typeWithProperty);
Js::Var value = ParseObject();
object->SetSlot(SetSlotArguments(propertyId, propertyIndex, value));
// if the next token is not a comma consider the list of members done.
if (tkComma != m_token.tk)
break;
Scan();
continue;
}
}
// slow path
Js::PropertyRecord const * propertyRecord;
scriptContext->GetOrAddPropertyRecord(currentStr, currentStrLength, &propertyRecord);
//check and consume ":"
if(Scan() != tkColon )
{
m_scanner.ThrowSyntaxError(JSERR_JsonNoColon);
}
Scan();
Js::Var value = ParseObject();
PropertyValueInfo info;
object->SetProperty(propertyRecord->GetPropertyId(), value, PropertyOperation_None, &info);
DynamicType* typeWithProperty = object->GetDynamicType();
if(IsCaching() && !propertyRecord->IsNumeric() && !info.IsNoCache() && typeWithProperty->GetIsShared() && typeWithProperty->GetTypeHandler()->IsPathTypeHandler())
{
PropertyIndex propertyIndex = info.GetPropertyIndex();
if(!previousCache)
{
// This is the first property in the set add it to the dictionary.
currentCache = JsonTypeCache::New(this->arenaAllocator, propertyRecord, typeWithoutProperty, typeWithProperty, propertyIndex);
typeCacheList->AddNew(propertyRecord, currentCache);
}
else if(!currentCache)
{
currentCache = JsonTypeCache::New(this->arenaAllocator, propertyRecord, typeWithoutProperty, typeWithProperty, propertyIndex);
previousCache->next = currentCache;
}
else
{
// cache miss!!
currentCache->Update(propertyRecord, typeWithoutProperty, typeWithProperty, propertyIndex);
}
previousCache = currentCache;
currentCache = currentCache->next;
}
// if the next token is not a comma consider the list of members done.
if (tkComma != m_token.tk)
break;
Scan();
}
// check and consume the ending '}"
CheckCurrentToken(tkRCurly, JSERR_JsonNoRcurly);
return object;
}
default:
m_scanner.ThrowSyntaxError(JSERR_JsonSyntax);
}
}
