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Jsrt.cpp
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//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------
#include "JsrtPch.h"
#include "JsrtInternal.h"
#include "JsrtExternalObject.h"
#include "JsrtExternalArrayBuffer.h"
#include "jsrtHelper.h"
#include "JsrtSourceHolder.h"
#include "ByteCode/ByteCodeSerializer.h"
#include "Common/ByteSwap.h"
#include "Library/DataView.h"
#include "Library/JavascriptExceptionMetadata.h"
#include "Library/JavascriptPromise.h"
#include "Base/ThreadContextTlsEntry.h"
#include "Codex/Utf8Helper.h"
// Parser Includes
#include "cmperr.h" // For ERRnoMemory
#include "screrror.h" // For CompileScriptException
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
#include "TestHooksRt.h"
#endif
struct CodexHeapAllocatorInterface
{
public:
static void* allocate(size_t size)
{
return HeapNewArray(char, size);
}
static void free(void* ptr, size_t count)
{
HeapDeleteArray(count, (char*) ptr);
}
};
JsErrorCode CheckContext(JsrtContext *currentContext, bool verifyRuntimeState,
bool allowInObjectBeforeCollectCallback)
{
if (currentContext == nullptr)
{
return JsErrorNoCurrentContext;
}
// We don't need parameter check if it's checked in previous wrapper.
if (verifyRuntimeState)
{
Js::ScriptContext *scriptContext = currentContext->GetScriptContext();
Assert(scriptContext != nullptr);
Recycler *recycler = scriptContext->GetRecycler();
ThreadContext *threadContext = scriptContext->GetThreadContext();
if (recycler && recycler->IsHeapEnumInProgress())
{
return JsErrorHeapEnumInProgress;
}
else if (!allowInObjectBeforeCollectCallback &&
recycler && recycler->IsInObjectBeforeCollectCallback())
{
return JsErrorInObjectBeforeCollectCallback;
}
else if (threadContext->IsExecutionDisabled())
{
return JsErrorInDisabledState;
}
else if (scriptContext->IsInProfileCallback())
{
return JsErrorInProfileCallback;
}
else if (threadContext->IsInThreadServiceCallback())
{
return JsErrorInThreadServiceCallback;
}
// Make sure we don't have an outstanding exception.
if (scriptContext->GetThreadContext()->GetRecordedException() != nullptr)
{
return JsErrorInExceptionState;
}
}
return JsNoError;
}
/////////////////////
#if ENABLE_TTD
void CALLBACK OnScriptLoad_TTDCallback(FinalizableObject* jsrtCtx, Js::FunctionBody* body, Js::Utf8SourceInfo* utf8SourceInfo, CompileScriptException* compileException, bool notify)
{
((JsrtContext*)jsrtCtx)->OnScriptLoad_TTDCallback(body, utf8SourceInfo, compileException, notify);
}
uint32 CALLBACK OnBPRegister_TTDCallback(void* runtimeRcvr, int64 bpID, Js::ScriptContext* scriptContext, Js::Utf8SourceInfo* utf8SourceInfo, uint32 line, uint32 column, BOOL* isNewBP)
{
return ((JsrtRuntime*)runtimeRcvr)->BPRegister_TTD(bpID, scriptContext, utf8SourceInfo, line, column, isNewBP);
}
void CALLBACK OnBPDelete_TTDCallback(void* runtimeRcvr, uint32 bpID)
{
((JsrtRuntime*)runtimeRcvr)->BPDelete_TTD(bpID);
}
void CALLBACK OnBPClearDocument_TTDCallback(void* runtimeRcvr)
{
((JsrtRuntime*)runtimeRcvr)->BPClearDocument_TTD();
}
#endif
//A create context function that we can funnel to for regular and record or debug aware creation
JsErrorCode CreateContextCore(_In_ JsRuntimeHandle runtimeHandle, _In_ TTDRecorder& _actionEntryPopper, _In_ bool inRecordMode, _In_ bool activelyRecording, _In_ bool inReplayMode, _Out_ JsContextRef *newContext)
{
JsrtRuntime * runtime = JsrtRuntime::FromHandle(runtimeHandle);
ThreadContext * threadContext = runtime->GetThreadContext();
if(threadContext->GetRecycler() && threadContext->GetRecycler()->IsHeapEnumInProgress())
{
return JsErrorHeapEnumInProgress;
}
else if(threadContext->IsInThreadServiceCallback())
{
return JsErrorInThreadServiceCallback;
}
ThreadContextScope scope(threadContext);
if(!scope.IsValid())
{
return JsErrorWrongThread;
}
#if ENABLE_TTD
TTD::NSLogEvents::EventLogEntry* createEvent = nullptr;
if(activelyRecording)
{
createEvent = threadContext->TTDLog->RecordJsRTCreateScriptContext(_actionEntryPopper);
}
#endif
JsrtContext * context = JsrtContext::New(runtime);
#if ENABLE_TTD
if(inRecordMode | inReplayMode)
{
Js::ScriptContext* scriptContext = context->GetScriptContext();
HostScriptContextCallbackFunctor callbackFunctor((FinalizableObject*)context, (void*)runtime, &OnScriptLoad_TTDCallback, &OnBPRegister_TTDCallback, &OnBPDelete_TTDCallback, &OnBPClearDocument_TTDCallback);
#if ENABLE_TTD_DIAGNOSTICS_TRACING
bool noNative = true;
bool doDebug = true;
#else
bool noNative = TTD_FORCE_NOJIT_MODE || threadContext->TTDLog->IsDebugModeFlagSet();
bool doDebug = TTD_FORCE_DEBUG_MODE || threadContext->TTDLog->IsDebugModeFlagSet();
#endif
threadContext->TTDLog->PushMode(TTD::TTDMode::ExcludedExecutionTTAction);
if(inRecordMode)
{
threadContext->TTDContext->AddNewScriptContextRecord(context, scriptContext, callbackFunctor, noNative, doDebug);
}
else
{
threadContext->TTDContext->AddNewScriptContextReplay(context, scriptContext, callbackFunctor, noNative, doDebug);
}
threadContext->TTDLog->SetModeFlagsOnContext(scriptContext);
threadContext->TTDLog->PopMode(TTD::TTDMode::ExcludedExecutionTTAction);
}
#endif
#ifdef ENABLE_SCRIPT_DEBUGGING
JsrtDebugManager* jsrtDebugManager = runtime->GetJsrtDebugManager();
if(jsrtDebugManager != nullptr)
{
// JsDiagStartDebugging was called
threadContext->GetDebugManager()->SetLocalsDisplayFlags(Js::DebugManager::LocalsDisplayFlags::LocalsDisplayFlags_NoGroupMethods);
Js::ScriptContext* scriptContext = context->GetScriptContext();
Js::DebugContext* debugContext = scriptContext->GetDebugContext();
debugContext->SetHostDebugContext(jsrtDebugManager);
if (!jsrtDebugManager->IsDebugEventCallbackSet())
{
// JsDiagStopDebugging was called so we need to be in SourceRunDownMode
debugContext->SetDebuggerMode(Js::DebuggerMode::SourceRundown);
}
else
{
// Set Debugging mode
scriptContext->InitializeDebugging();
Js::ProbeContainer* probeContainer = debugContext->GetProbeContainer();
probeContainer->InitializeInlineBreakEngine(jsrtDebugManager);
probeContainer->InitializeDebuggerScriptOptionCallback(jsrtDebugManager);
}
}
#endif
#if ENABLE_TTD
if(activelyRecording)
{
threadContext->TTDLog->RecordJsRTCreateScriptContextResult(createEvent, context->GetScriptContext());
}
#endif
*newContext = (JsContextRef)context;
return JsNoError;
}
#if ENABLE_TTD
void CALLBACK CreateExternalObject_TTDCallback(Js::ScriptContext* ctx, Js::Var prototype, Js::Var* object)
{
TTDAssert(object != nullptr, "This should always be a valid location");
Js::RecyclableObject * prototypeObject = nullptr;
if (prototype != JS_INVALID_REFERENCE)
{
prototypeObject = Js::RecyclableObject::FromVar(prototype);
}
*object = JsrtExternalObject::Create(nullptr, nullptr, prototypeObject, ctx);
}
void CALLBACK TTDDummyPromiseContinuationCallback(JsValueRef task, void *callbackState)
{
TTDAssert(false, "This should never actually be invoked!!!");
}
void CALLBACK CreateJsRTContext_TTDCallback(void* runtimeHandle, Js::ScriptContext** result)
{
JsContextRef newContext = nullptr;
*result = nullptr;
TTDRecorder dummyActionEntryPopper;
JsErrorCode err = CreateContextCore(static_cast<JsRuntimeHandle>(runtimeHandle), dummyActionEntryPopper, false /*inRecordMode*/, false /*activelyRecording*/, true /*inReplayMode*/, &newContext);
TTDAssert(err == JsNoError, "Shouldn't fail on us!!!");
*result = static_cast<JsrtContext*>(newContext)->GetScriptContext();
(*result)->GetLibrary()->SetNativeHostPromiseContinuationFunction((Js::JavascriptLibrary::PromiseContinuationCallback)TTDDummyPromiseContinuationCallback, nullptr);
//To ensure we have a valid context active (when we next try and inflate into this context) set this as active by convention
JsrtContext::TrySetCurrent(static_cast<JsrtContext*>(newContext));
}
void CALLBACK ReleaseJsRTContext_TTDCallback(FinalizableObject* jsrtCtx)
{
static_cast<JsrtContext*>(jsrtCtx)->GetScriptContext()->GetThreadContext()->GetRecycler()->RootRelease(jsrtCtx);
JsrtContext::OnReplayDisposeContext_TTDCallback(jsrtCtx);
}
void CALLBACK SetActiveJsRTContext_TTDCallback(void* runtimeHandle, Js::ScriptContext* ctx)
{
JsrtRuntime * runtime = JsrtRuntime::FromHandle(static_cast<JsRuntimeHandle>(runtimeHandle));
ThreadContext * threadContext = runtime->GetThreadContext();
threadContext->TTDContext->SetActiveScriptContext(ctx);
JsrtContext* runtimeCtx = (JsrtContext*)threadContext->TTDContext->GetRuntimeContextForScriptContext(ctx);
JsrtContext::TrySetCurrent(runtimeCtx);
}
#endif
//A create runtime function that we can funnel to for regular and record or debug aware creation
JsErrorCode CreateRuntimeCore(_In_ JsRuntimeAttributes attributes,
_In_opt_ const char* optTTUri, size_t optTTUriCount, bool isRecord, bool isReplay, bool isDebug,
_In_ UINT32 snapInterval, _In_ UINT32 snapHistoryLength,
_In_opt_ TTDOpenResourceStreamCallback openResourceStream, _In_opt_ JsTTDReadBytesFromStreamCallback readBytesFromStream,
_In_opt_ JsTTDWriteBytesToStreamCallback writeBytesToStream, _In_opt_ JsTTDFlushAndCloseStreamCallback flushAndCloseStream,
_In_opt_ JsThreadServiceCallback threadService, _Out_ JsRuntimeHandle *runtimeHandle)
{
VALIDATE_ENTER_CURRENT_THREAD();
PARAM_NOT_NULL(runtimeHandle);
*runtimeHandle = nullptr;
JsErrorCode runtimeResult = GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode {
const JsRuntimeAttributes JsRuntimeAttributesAll =
(JsRuntimeAttributes)(
JsRuntimeAttributeDisableBackgroundWork |
JsRuntimeAttributeAllowScriptInterrupt |
JsRuntimeAttributeEnableIdleProcessing |
JsRuntimeAttributeDisableEval |
JsRuntimeAttributeDisableNativeCodeGeneration |
JsRuntimeAttributeDisableExecutablePageAllocation |
JsRuntimeAttributeEnableExperimentalFeatures |
JsRuntimeAttributeDispatchSetExceptionsToDebugger |
JsRuntimeAttributeDisableFatalOnOOM
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
| JsRuntimeAttributeSerializeLibraryByteCode
#endif
);
Assert((attributes & ~JsRuntimeAttributesAll) == 0);
if ((attributes & ~JsRuntimeAttributesAll) != 0)
{
return JsErrorInvalidArgument;
}
CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0, 0, nullptr);
AllocationPolicyManager * policyManager = HeapNew(AllocationPolicyManager, (attributes & JsRuntimeAttributeDisableBackgroundWork) == 0);
bool enableExperimentalFeatures = (attributes & JsRuntimeAttributeEnableExperimentalFeatures) != 0;
ThreadContext * threadContext = HeapNew(ThreadContext, policyManager, threadService, enableExperimentalFeatures);
if (((attributes & JsRuntimeAttributeDisableBackgroundWork) != 0)
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
&& !Js::Configuration::Global.flags.ConcurrentRuntime
#endif
)
{
threadContext->OptimizeForManyInstances(true);
#if ENABLE_NATIVE_CODEGEN
threadContext->EnableBgJit(false);
#endif
}
if (!threadContext->IsRentalThreadingEnabledInJSRT()
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
|| Js::Configuration::Global.flags.DisableRentalThreading
#endif
)
{
threadContext->SetIsThreadBound();
}
if (attributes & JsRuntimeAttributeAllowScriptInterrupt)
{
threadContext->SetThreadContextFlag(ThreadContextFlagCanDisableExecution);
}
if (attributes & JsRuntimeAttributeDisableEval)
{
threadContext->SetThreadContextFlag(ThreadContextFlagEvalDisabled);
}
if (attributes & JsRuntimeAttributeDisableNativeCodeGeneration)
{
threadContext->SetThreadContextFlag(ThreadContextFlagNoJIT);
}
if (attributes & JsRuntimeAttributeDisableExecutablePageAllocation)
{
threadContext->SetThreadContextFlag(ThreadContextFlagNoJIT);
threadContext->SetThreadContextFlag(ThreadContextFlagNoDynamicThunks);
}
if (attributes & JsRuntimeAttributeDisableFatalOnOOM)
{
threadContext->SetThreadContextFlag(ThreadContextFlagDisableFatalOnOOM);
}
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
if (Js::Configuration::Global.flags.PrimeRecycler)
{
threadContext->EnsureRecycler()->Prime();
}
#endif
bool enableIdle = (attributes & JsRuntimeAttributeEnableIdleProcessing) == JsRuntimeAttributeEnableIdleProcessing;
bool dispatchExceptions = (attributes & JsRuntimeAttributeDispatchSetExceptionsToDebugger) == JsRuntimeAttributeDispatchSetExceptionsToDebugger;
JsrtRuntime * runtime = HeapNew(JsrtRuntime, threadContext, enableIdle, dispatchExceptions);
threadContext->SetCurrentThreadId(ThreadContext::NoThread);
*runtimeHandle = runtime->ToHandle();
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
runtime->SetSerializeByteCodeForLibrary((attributes & JsRuntimeAttributeSerializeLibraryByteCode) != 0);
#endif
return JsNoError;
});
#if ENABLE_TTD
if(runtimeResult != JsNoError)
{
return runtimeResult;
}
if(isRecord | isReplay | isDebug)
{
ThreadContext* threadContext = JsrtRuntime::FromHandle(*runtimeHandle)->GetThreadContext();
if(isRecord && isReplay)
{
return JsErrorInvalidArgument; //A runtime can only be in 1 mode
}
if(isReplay && optTTUri == nullptr)
{
return JsErrorInvalidArgument; //We must have a location to store data into
}
runtimeResult = GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode {
//Make sure the thread context recycler is allocated before we do anything else
ThreadContextScope scope(threadContext);
threadContext->EnsureRecycler();
threadContext->InitTimeTravel(threadContext, *runtimeHandle, snapInterval, max<uint32>(2, snapHistoryLength));
threadContext->InitHostFunctionsAndTTData(isRecord, isReplay, isDebug, optTTUriCount, optTTUri,
openResourceStream, readBytesFromStream, writeBytesToStream, flushAndCloseStream,
&CreateExternalObject_TTDCallback, &CreateJsRTContext_TTDCallback, &ReleaseJsRTContext_TTDCallback, &SetActiveJsRTContext_TTDCallback);
return JsNoError;
});
}
#endif
return runtimeResult;
}
/////////////////////
CHAKRA_API JsCreateRuntime(_In_ JsRuntimeAttributes attributes, _In_opt_ JsThreadServiceCallback threadService, _Out_ JsRuntimeHandle *runtimeHandle)
{
return CreateRuntimeCore(attributes,
nullptr /*optRecordUri*/, 0 /*optRecordUriCount */, false /*isRecord*/, false /*isReplay*/, false /*isDebug*/,
UINT_MAX /*optSnapInterval*/, UINT_MAX /*optLogLength*/,
nullptr, nullptr, nullptr, nullptr, /*TTD IO handlers*/
threadService, runtimeHandle);
}
template <CollectionFlags flags>
JsErrorCode JsCollectGarbageCommon(JsRuntimeHandle runtimeHandle)
{
return GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode {
VALIDATE_INCOMING_RUNTIME_HANDLE(runtimeHandle);
ThreadContext * threadContext = JsrtRuntime::FromHandle(runtimeHandle)->GetThreadContext();
if (threadContext->GetRecycler() && threadContext->GetRecycler()->IsHeapEnumInProgress())
{
return JsErrorHeapEnumInProgress;
}
else if (threadContext->IsInThreadServiceCallback())
{
return JsErrorInThreadServiceCallback;
}
ThreadContextScope scope(threadContext);
if (!scope.IsValid())
{
return JsErrorWrongThread;
}
Recycler* recycler = threadContext->EnsureRecycler();
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
if (flags & CollectOverride_SkipStack)
{
Recycler::AutoEnterExternalStackSkippingGCMode autoGC(recycler);
recycler->CollectNow<flags>();
}
else
#endif
{
recycler->CollectNow<flags>();
}
return JsNoError;
});
}
CHAKRA_API JsCollectGarbage(_In_ JsRuntimeHandle runtimeHandle)
{
return JsCollectGarbageCommon<CollectNowExhaustive>(runtimeHandle);
}
#ifdef ENABLE_DEBUG_CONFIG_OPTIONS
CHAKRA_API JsPrivateCollectGarbageSkipStack(_In_ JsRuntimeHandle runtimeHandle)
{
return JsCollectGarbageCommon<CollectNowExhaustiveSkipStack>(runtimeHandle);
}
CHAKRA_API JsPrivateDetachArrayBuffer(_In_ JsValueRef ref, _Out_ void** detachedState)
{
return GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode
{
VALIDATE_JSREF(ref);
*detachedState = Js::JavascriptOperators::DetachVarAndGetState(ref, false /*queueForDelayFree*/);
return JsNoError;
});
}
CHAKRA_API JsPrivateFreeDetachedArrayBuffer(_In_ void* detachedState)
{
return GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode
{
auto state = reinterpret_cast<Js::ArrayBufferDetachedStateBase*>(detachedState);
state->CleanUp();
return JsNoError;
});
}
#endif
CHAKRA_API JsDisposeRuntime(_In_ JsRuntimeHandle runtimeHandle)
{
return GlobalAPIWrapper_NoRecord([&] () -> JsErrorCode {
VALIDATE_INCOMING_RUNTIME_HANDLE(runtimeHandle);
JsrtRuntime * runtime = JsrtRuntime::FromHandle(runtimeHandle);
ThreadContext * threadContext = runtime->GetThreadContext();
ThreadContextScope scope(threadContext);
// We should not dispose if the runtime is being used.
if (!scope.IsValid() ||
scope.WasInUse() ||
(threadContext->GetRecycler() && threadContext->GetRecycler()->IsHeapEnumInProgress()))
{
return JsErrorRuntimeInUse;
}
else if (threadContext->IsInThreadServiceCallback())
{
return JsErrorInThreadServiceCallback;
}
// Invoke and clear the callbacks while the contexts and runtime are still available
{
Recycler* recycler = threadContext->GetRecycler();
if (recycler != nullptr)
{
recycler->ClearObjectBeforeCollectCallbacks();
}
}
#ifdef ENABLE_SCRIPT_DEBUGGING
if (runtime->GetJsrtDebugManager() != nullptr)
{
runtime->GetJsrtDebugManager()->ClearDebuggerObjects();
}
#endif
Js::ScriptContext *scriptContext;
for (scriptContext = threadContext->GetScriptContextList(); scriptContext; scriptContext = scriptContext->next)
{
#ifdef ENABLE_SCRIPT_DEBUGGING
if (runtime->GetJsrtDebugManager() != nullptr)
{
runtime->GetJsrtDebugManager()->ClearDebugDocument(scriptContext);
}
#endif
scriptContext->MarkForClose();
}
// Close any open Contexts.
// We need to do this before recycler shutdown, because ScriptEngine->Close won't work then.
runtime->CloseContexts();
#ifdef ENABLE_SCRIPT_DEBUGGING
runtime->DeleteJsrtDebugManager();
#endif
#if defined(CHECK_MEMORY_LEAK) || defined(LEAK_REPORT)
bool doFinalGC = false;
#if defined(LEAK_REPORT)
if (Js::Configuration::Global.flags.IsEnabled(Js::LeakReportFlag))
{
doFinalGC = true;
}
#endif
#if defined(CHECK_MEMORY_LEAK)
if (Js::Configuration::Global.flags.CheckMemoryLeak)
{
doFinalGC = true;
}
#endif
if (doFinalGC)
{
Recycler *recycler = threadContext->GetRecycler();
if (recycler)
{
recycler->EnsureNotCollecting();
recycler->CollectNow<CollectNowFinalGC>();
Assert(!recycler->CollectionInProgress());
}
}
#endif
runtime->SetBeforeCollectCallback(nullptr, nullptr);
threadContext->CloseForJSRT();
HeapDelete(threadContext);
HeapDelete(runtime);
scope.Invalidate();
return JsNoError;
});
}
CHAKRA_API JsAddRef(_In_ JsRef ref, _Out_opt_ unsigned int *count)
{
VALIDATE_JSREF(ref);
if (count != nullptr)
{
*count = 0;
}
if (Js::TaggedNumber::Is(ref))
{
// The count is always one because these are never collected
if (count)
{
*count = 1;
}
return JsNoError;
}
if (JsrtContext::Is(ref))
{
return GlobalAPIWrapper_NoRecord([&] () -> JsErrorCode
{
Recycler * recycler = static_cast<JsrtContext *>(ref)->GetRuntime()->GetThreadContext()->GetRecycler();
recycler->RootAddRef(ref, count);
return JsNoError;
});
}
else
{
ThreadContext* threadContext = ThreadContext::GetContextForCurrentThread();
if (threadContext == nullptr)
{
return JsErrorNoCurrentContext;
}
Recycler * recycler = threadContext->GetRecycler();
return GlobalAPIWrapper([&] (TTDRecorder& _actionEntryPopper) -> JsErrorCode
{
// Note, some references may live in arena-allocated memory, so we need to do this check
if (!recycler->IsValidObject(ref))
{
return JsNoError;
}
#if ENABLE_TTD
unsigned int lCount = 0;
recycler->RootAddRef(ref, &lCount);
if (count != nullptr)
{
*count = lCount;
}
if((lCount == 1) && (threadContext->IsRuntimeInTTDMode()) && (!threadContext->TTDLog->IsPropertyRecordRef(ref)))
{
Js::RecyclableObject* obj = Js::RecyclableObject::FromVar(ref);
if(obj->GetScriptContext()->IsTTDRecordModeEnabled())
{
if(obj->GetScriptContext()->ShouldPerformRecordAction())
{
threadContext->TTDLog->RecordJsRTAddRootRef(_actionEntryPopper, (Js::Var)ref);
}
threadContext->TTDContext->AddRootRef_Record(TTD_CONVERT_OBJ_TO_LOG_PTR_ID(obj), obj);
}
}
#else
recycler->RootAddRef(ref, count);
#endif
return JsNoError;
});
}
}
CHAKRA_API JsRelease(_In_ JsRef ref, _Out_opt_ unsigned int *count)
{
VALIDATE_JSREF(ref);
if (count != nullptr)
{
*count = 0;
}
if (Js::TaggedNumber::Is(ref))
{
// The count is always one because these are never collected
if (count)
{
*count = 1;
}
return JsNoError;
}
if (JsrtContext::Is(ref))
{
return GlobalAPIWrapper_NoRecord([&] () -> JsErrorCode
{
Recycler * recycler = static_cast<JsrtContext *>(ref)->GetRuntime()->GetThreadContext()->GetRecycler();
recycler->RootRelease(ref, count);
return JsNoError;
});
}
else
{
ThreadContext* threadContext = ThreadContext::GetContextForCurrentThread();
if (threadContext == nullptr)
{
return JsErrorNoCurrentContext;
}
Recycler * recycler = threadContext->GetRecycler();
return GlobalAPIWrapper([&](TTDRecorder& _actionEntryPopper) -> JsErrorCode
{
// Note, some references may live in arena-allocated memory, so we need to do this check
if (!recycler->IsValidObject(ref))
{
return JsNoError;
}
recycler->RootRelease(ref, count);
return JsNoError;
});
}
}
CHAKRA_API JsSetObjectBeforeCollectCallback(_In_ JsRef ref, _In_opt_ void *callbackState, _In_ JsObjectBeforeCollectCallback objectBeforeCollectCallback)
{
VALIDATE_JSREF(ref);
if (Js::TaggedNumber::Is(ref))
{
return JsErrorInvalidArgument;
}
if (JsrtContext::Is(ref))
{
return GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode
{
ThreadContext* threadContext = static_cast<JsrtContext *>(ref)->GetRuntime()->GetThreadContext();
Recycler * recycler = threadContext->GetRecycler();
recycler->SetObjectBeforeCollectCallback(ref, reinterpret_cast<Recycler::ObjectBeforeCollectCallback>(objectBeforeCollectCallback), callbackState,
reinterpret_cast<Recycler::ObjectBeforeCollectCallbackWrapper>(JsrtCallbackState::ObjectBeforeCallectCallbackWrapper), threadContext);
return JsNoError;
});
}
else
{
ThreadContext* threadContext = ThreadContext::GetContextForCurrentThread();
if (threadContext == nullptr)
{
return JsErrorNoCurrentContext;
}
Recycler * recycler = threadContext->GetRecycler();
return GlobalAPIWrapper_NoRecord([&]() -> JsErrorCode
{
if (!recycler->IsValidObject(ref))
{
return JsErrorInvalidArgument;
}
recycler->SetObjectBeforeCollectCallback(ref, reinterpret_cast<Recycler::ObjectBeforeCollectCallback>(objectBeforeCollectCallback), callbackState,
reinterpret_cast<Recycler::ObjectBeforeCollectCallbackWrapper>(JsrtCallbackState::ObjectBeforeCallectCallbackWrapper), threadContext);
return JsNoError;
});
}
}
CHAKRA_API JsCreateContext(_In_ JsRuntimeHandle runtimeHandle, _Out_ JsContextRef *newContext)
{
return GlobalAPIWrapper([&](TTDRecorder& _actionEntryPopper) -> JsErrorCode {
PARAM_NOT_NULL(newContext);
VALIDATE_INCOMING_RUNTIME_HANDLE(runtimeHandle);
bool inRecord = false;
bool activelyRecording = false;
bool inReplay = false;
#if ENABLE_TTD
JsrtRuntime * runtime = JsrtRuntime::FromHandle(runtimeHandle);
ThreadContext * threadContext = runtime->GetThreadContext();
if(threadContext->IsRuntimeInTTDMode() && threadContext->TTDContext->GetActiveScriptContext() != nullptr)
{
Js::ScriptContext* currentCtx = threadContext->TTDContext->GetActiveScriptContext();
inRecord = currentCtx->IsTTDRecordModeEnabled();
activelyRecording = currentCtx->ShouldPerformRecordAction();
inReplay = currentCtx->IsTTDReplayModeEnabled();
}
#endif
return CreateContextCore(runtimeHandle, _actionEntryPopper, inRecord, activelyRecording, inReplay, newContext);
});
}
CHAKRA_API JsGetCurrentContext(_Out_ JsContextRef *currentContext)
{
PARAM_NOT_NULL(currentContext);
BEGIN_JSRT_NO_EXCEPTION
{
*currentContext = (JsContextRef)JsrtContext::GetCurrent();
}
END_JSRT_NO_EXCEPTION
}
CHAKRA_API JsSetCurrentContext(_In_ JsContextRef newContext)
{
VALIDATE_ENTER_CURRENT_THREAD();
return GlobalAPIWrapper([&] (TTDRecorder& _actionEntryPopper) -> JsErrorCode {
JsrtContext *currentContext = JsrtContext::GetCurrent();
Recycler* recycler = currentContext != nullptr ? currentContext->GetScriptContext()->GetRecycler() : nullptr;
#if ENABLE_TTD
Js::ScriptContext* newScriptContext = newContext != nullptr ? static_cast<JsrtContext*>(newContext)->GetScriptContext() : nullptr;
Js::ScriptContext* oldScriptContext = currentContext != nullptr ? static_cast<JsrtContext*>(currentContext)->GetScriptContext() : nullptr;
if(newScriptContext == nullptr)
{
if(oldScriptContext == nullptr)
{
; //if newScriptContext and oldScriptContext are null then we don't worry about doing anything
}
else
{
if(oldScriptContext->IsTTDRecordModeEnabled())
{
//already know newScriptContext != oldScriptContext so don't check again
if(oldScriptContext->ShouldPerformRecordAction())
{
oldScriptContext->GetThreadContext()->TTDLog->RecordJsRTSetCurrentContext(_actionEntryPopper, nullptr);
}
oldScriptContext->GetThreadContext()->TTDContext->SetActiveScriptContext(nullptr);
}
}
}
else
{
if(newScriptContext->IsTTDRecordModeEnabled())
{
if(newScriptContext != oldScriptContext && newScriptContext->ShouldPerformRecordAction())
{
newScriptContext->GetThreadContext()->TTDLog->RecordJsRTSetCurrentContext(_actionEntryPopper, newScriptContext->GetGlobalObject());
}
newScriptContext->GetThreadContext()->TTDContext->SetActiveScriptContext(newScriptContext);
}
}
#endif
if (currentContext && recycler->IsHeapEnumInProgress())
{
return JsErrorHeapEnumInProgress;
}
else if (currentContext && currentContext->GetRuntime()->GetThreadContext()->IsInThreadServiceCallback())
{
return JsErrorInThreadServiceCallback;
}
if (!JsrtContext::TrySetCurrent((JsrtContext *)newContext))
{
return JsErrorWrongThread;
}
return JsNoError;
});
}
CHAKRA_API JsGetContextOfObject(_In_ JsValueRef object, _Out_ JsContextRef *context)
{
VALIDATE_JSREF(object);
PARAM_NOT_NULL(context);
BEGIN_JSRT_NO_EXCEPTION
{
if (!Js::RecyclableObject::Is(object))
{
RETURN_NO_EXCEPTION(JsErrorArgumentNotObject);
}
Js::RecyclableObject* obj = Js::RecyclableObject::FromVar(object);
*context = (JsContextRef)obj->GetScriptContext()->GetLibrary()->GetJsrtContext();
}
END_JSRT_NO_EXCEPTION
}
CHAKRA_API JsGetContextData(_In_ JsContextRef context, _Out_ void **data)
{
VALIDATE_JSREF(context);
PARAM_NOT_NULL(data);
BEGIN_JSRT_NO_EXCEPTION
{
if (!JsrtContext::Is(context))
{
RETURN_NO_EXCEPTION(JsErrorInvalidArgument);
}
*data = static_cast<JsrtContext *>(context)->GetExternalData();
}
END_JSRT_NO_EXCEPTION
}
CHAKRA_API JsSetContextData(_In_ JsContextRef context, _In_ void *data)
{
VALIDATE_JSREF(context);
BEGIN_JSRT_NO_EXCEPTION
{
if (!JsrtContext::Is(context))
{
RETURN_NO_EXCEPTION(JsErrorInvalidArgument);
}
static_cast<JsrtContext *>(context)->SetExternalData(data);
}
END_JSRT_NO_EXCEPTION
}
void HandleScriptCompileError(Js::ScriptContext * scriptContext, CompileScriptException * se, const WCHAR * sourceUrl)
{
HRESULT hr = se->ei.scode;
if (hr == E_OUTOFMEMORY || hr == VBSERR_OutOfMemory || hr == ERRnoMemory)
{
Js::Throw::OutOfMemory();
}
else if (hr == E_ABORT)
{
Js::JavascriptOperators::ScriptAbort();
}
Js::JavascriptError* error = Js::JavascriptError::CreateFromCompileScriptException(scriptContext, se, sourceUrl);
Js::JavascriptExceptionObject * exceptionObject = RecyclerNew(scriptContext->GetRecycler(),
Js::JavascriptExceptionObject, error, scriptContext, nullptr);
scriptContext->GetThreadContext()->SetRecordedException(exceptionObject);
}
CHAKRA_API JsGetUndefinedValue(_Out_ JsValueRef *undefinedValue)
{
return ContextAPINoScriptWrapper_NoRecord([&] (Js::ScriptContext *scriptContext) -> JsErrorCode {
PARAM_NOT_NULL(undefinedValue);
*undefinedValue = scriptContext->GetLibrary()->GetUndefined();
return JsNoError;
},
/*allowInObjectBeforeCollectCallback*/true);
}
CHAKRA_API JsGetNullValue(_Out_ JsValueRef *nullValue)
{
return ContextAPINoScriptWrapper_NoRecord([&] (Js::ScriptContext *scriptContext) -> JsErrorCode {
PARAM_NOT_NULL(nullValue);
*nullValue = scriptContext->GetLibrary()->GetNull();
return JsNoError;
},
/*allowInObjectBeforeCollectCallback*/true);
}
CHAKRA_API JsGetTrueValue(_Out_ JsValueRef *trueValue)
{
return ContextAPINoScriptWrapper_NoRecord([&] (Js::ScriptContext *scriptContext) -> JsErrorCode {
PARAM_NOT_NULL(trueValue);
*trueValue = scriptContext->GetLibrary()->GetTrue();
return JsNoError;
},
/*allowInObjectBeforeCollectCallback*/true);
}
CHAKRA_API JsGetFalseValue(_Out_ JsValueRef *falseValue)
{
return ContextAPINoScriptWrapper_NoRecord([&] (Js::ScriptContext *scriptContext) -> JsErrorCode {
PARAM_NOT_NULL(falseValue);
*falseValue = scriptContext->GetLibrary()->GetFalse();
return JsNoError;
},
/*allowInObjectBeforeCollectCallback*/true);
}
CHAKRA_API JsBoolToBoolean(_In_ bool value, _Out_ JsValueRef *booleanValue)
{
return ContextAPINoScriptWrapper([&] (Js::ScriptContext *scriptContext, TTDRecorder& _actionEntryPopper) -> JsErrorCode {
PERFORM_JSRT_TTD_RECORD_ACTION(scriptContext, RecordJsRTCreateBoolean, value);
PARAM_NOT_NULL(booleanValue);
*booleanValue = value ? scriptContext->GetLibrary()->GetTrue() : scriptContext->GetLibrary()->GetFalse();
PERFORM_JSRT_TTD_RECORD_ACTION_RESULT(scriptContext, booleanValue);
return JsNoError;
},
/*allowInObjectBeforeCollectCallback*/true);
}
CHAKRA_API JsBooleanToBool(_In_ JsValueRef value, _Out_ bool *boolValue)
{
VALIDATE_JSREF(value);
PARAM_NOT_NULL(boolValue);
BEGIN_JSRT_NO_EXCEPTION
{
if (!Js::JavascriptBoolean::Is(value))
{
RETURN_NO_EXCEPTION(JsErrorInvalidArgument);