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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#ifndef __PREDEFTLSSLOT_H__
#define __PREDEFTLSSLOT_H__
// And here are the predefined slots for accessing TLS from various DLLs of the CLR.
// Note that we want to support combinations of Debug and Retail DLLs for testing
// purposes, so we burn the slots into the retail EE even if a debug CLR dll needs
// them.
enum PredefinedTlsSlots
{
TlsIdx_StrongName,
TlsIdx_JitPerf,
TlsIdx_JitX86Perf,
TlsIdx_JitLogEnv,
TlsIdx_IceCap,
TlsIdx_StressLog,
TlsIdx_StackProbe,
TlsIdx_Check,
TlsIdx_ForbidGCLoaderUseCount,
TlsIdx_ClrDebugState, // Pointer to ClrDebugState* structure
TlsIdx_StressThread,
// Add more indices here.
TlsIdx_ThreadType, // bit flags to indicate special thread's type
TlsIdx_CantStopCount, // Can't-stop counter for any thread
TlsIdx_OwnedCrstsChain, // slot to store the Crsts owned by this thread
TlsIdx_AppDomainAgilePendingTable,
TlsIdx_CantAllocCount, //Can't allocate memory on heap in this thread
TlsIdx_AssertDlgStatus, // Whether the thread is displaying an assert dialog
// A transient thread value that indicates this thread is currently walking its stack
// or the stack of another thread. This value is useful to help short-circuit
// some problematic checks in the loader, guarantee that types & assemblies
// encountered during the walk must already be loaded, and provide information to control
// assembly loading behavior during stack walks.
//
// This value is set around the main portions of the stack walk (as those portions may
// enter the type & assembly loaders). This is also explicitly cleared while the
// walking thread calls the stackwalker callback or needs to execute managed code, as
// such calls may execute arbitrary code unrelated to the actual stack walking, and
// may never return, in the case of exception stackwalk callbacks.
TlsIdx_StackWalkerWalkingThread, // Thread* that the stack walker is currently walking.
// Save the last exception info. Sometimes we need this info in our EX_CATCH, such as for SO.
// It will be better if VC can supply this in catch(...) block.
// !!! These data may become stale. Use it only inside exception handling code.
// !!! Please access these fields through GetCurrentExceptionPointers which validates the data to some level.
TlsIdx_EXCEPTION_CODE,
TlsIdx_PEXCEPTION_RECORD,
TlsIdx_PCONTEXT,
TlsIdx_SOIntolerantTransitionHandler, // The thread is entering SO intolerant code. This one is used by
// Thread::IsSOIntolerant to decide the SO mode of the thread.
MAX_PREDEFINED_TLS_SLOT
};
enum TlsThreadTypeFlag // flag used for thread type in Tls data
{
ThreadType_GC = 0x00000001,
ThreadType_Timer = 0x00000002,
ThreadType_Gate = 0x00000004,
ThreadType_DbgHelper = 0x00000008,
ThreadType_Shutdown = 0x00000010,
ThreadType_DynamicSuspendEE = 0x00000020,
ThreadType_Finalizer = 0x00000040,
ThreadType_ADUnloadHelper = 0x00000200,
ThreadType_ShutdownHelper = 0x00000400,
ThreadType_Threadpool_IOCompletion = 0x00000800,
ThreadType_Threadpool_Worker = 0x00001000,
ThreadType_Wait = 0x00002000,
ThreadType_ProfAPI_Attach = 0x00004000,
ThreadType_ProfAPI_Detach = 0x00008000,
ThreadType_ETWRundownThread = 0x00010000,
ThreadType_GenericInstantiationCompare= 0x00020000, // Used to indicate that the thread is determining if a generic instantiation in an ngen image matches a lookup.
};
#endif
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