#ifndef _NTPEBTEB_H
typedef struct _TEB
{
NT_TIB NtTib;
PVOID EnvironmentPointer;
CLIENT_ID ClientId;
PVOID ActiveRpcHandle;
PVOID ThreadLocalStoragePointer;
PPEB ProcessEnvironmentBlock;
ULONG LastErrorValue;
ULONG CountOfOwnedCriticalSections;
PVOID CsrClientThread;
PVOID Win32ThreadInfo;
ULONG User32Reserved[26];
ULONG UserReserved[5];
PVOID WOW32Reserved;
LCID CurrentLocale;
ULONG FpSoftwareStatusRegister;
PVOID ReservedForDebuggerInstrumentation[16];
#ifdef _WIN64
PVOID SystemReserved1[25];
PVOID HeapFlsData;
ULONG_PTR RngState[4];
#else
PVOID SystemReserved1[26];
#endif
CHAR PlaceholderCompatibilityMode;
BOOLEAN PlaceholderHydrationAlwaysExplicit;
CHAR PlaceholderReserved[10];
ULONG ProxiedProcessId;
ACTIVATION_CONTEXT_STACK ActivationStack;
UCHAR WorkingOnBehalfTicket[8];
NTSTATUS ExceptionCode;
PACTIVATION_CONTEXT_STACK ActivationContextStackPointer;
ULONG_PTR InstrumentationCallbackSp;
ULONG_PTR InstrumentationCallbackPreviousPc;
ULONG_PTR InstrumentationCallbackPreviousSp;
#ifdef _WIN64
ULONG TxFsContext;
#endif
BOOLEAN InstrumentationCallbackDisabled;
#ifdef _WIN64
BOOLEAN UnalignedLoadStoreExceptions;
#endif
#ifndef _WIN64
UCHAR SpareBytes[23];
ULONG TxFsContext;
#endif
GDI_TEB_BATCH GdiTebBatch;
CLIENT_ID RealClientId;
HANDLE GdiCachedProcessHandle;
ULONG GdiClientPID;
ULONG GdiClientTID;
PVOID GdiThreadLocalInfo;
ULONG_PTR Win32ClientInfo[WIN32_CLIENT_INFO_LENGTH];
PVOID glDispatchTable[233];
ULONG_PTR glReserved1[29];
PVOID glReserved2;
PVOID glSectionInfo;
PVOID glSection;
PVOID glTable;
PVOID glCurrentRC;
PVOID glContext;
NTSTATUS LastStatusValue;
UNICODE_STRING StaticUnicodeString;
WCHAR StaticUnicodeBuffer[STATIC_UNICODE_BUFFER_LENGTH];
PVOID DeallocationStack;
PVOID TlsSlots[TLS_MINIMUM_AVAILABLE];
LIST_ENTRY TlsLinks;
PVOID Vdm;
PVOID ReservedForNtRpc;
PVOID DbgSsReserved[2];
ULONG HardErrorMode;
#ifdef _WIN64
PVOID Instrumentation[11];
#else
PVOID Instrumentation[9];
#endif
GUID ActivityId;
PVOID SubProcessTag;
PVOID PerflibData;
PVOID EtwTraceData;
PVOID WinSockData;
ULONG GdiBatchCount;
union
{
PROCESSOR_NUMBER CurrentIdealProcessor;
ULONG IdealProcessorValue;
struct
{
UCHAR ReservedPad0;
UCHAR ReservedPad1;
UCHAR ReservedPad2;
UCHAR IdealProcessor;
};
};
ULONG GuaranteedStackBytes;
PVOID ReservedForPerf;
PVOID ReservedForOle; // tagSOleTlsData
ULONG WaitingOnLoaderLock;
PVOID SavedPriorityState;
ULONG_PTR ReservedForCodeCoverage;
PVOID ThreadPoolData;
PVOID *TlsExpansionSlots;
#ifdef _WIN64
PVOID ChpeV2CpuAreaInfo; // CHPEV2_CPUAREA_INFO // previously DeallocationBStore
PVOID Unused; // previously BStoreLimit
#endif
ULONG MuiGeneration;
ULONG IsImpersonating;
PVOID NlsCache;
PVOID pShimData;
ULONG HeapData;
HANDLE CurrentTransactionHandle;
PTEB_ACTIVE_FRAME ActiveFrame;
PVOID FlsData;
PVOID PreferredLanguages;
PVOID UserPrefLanguages;
PVOID MergedPrefLanguages;
ULONG MuiImpersonation;
union
{
USHORT CrossTebFlags;
USHORT SpareCrossTebBits : 16;
};
union
{
USHORT SameTebFlags;
struct
{
USHORT SafeThunkCall : 1;
USHORT InDebugPrint : 1;
USHORT HasFiberData : 1;
USHORT SkipThreadAttach : 1;
USHORT WerInShipAssertCode : 1;
USHORT RanProcessInit : 1;
USHORT ClonedThread : 1;
USHORT SuppressDebugMsg : 1;
USHORT DisableUserStackWalk : 1;
USHORT RtlExceptionAttached : 1;
USHORT InitialThread : 1;
USHORT SessionAware : 1;
USHORT LoadOwner : 1;
USHORT LoaderWorker : 1;
USHORT SkipLoaderInit : 1;
USHORT SkipFileAPIBrokering : 1;
};
};
PVOID TxnScopeEnterCallback;
PVOID TxnScopeExitCallback;
PVOID TxnScopeContext;
ULONG LockCount;
LONG WowTebOffset;
PVOID ResourceRetValue;
PVOID ReservedForWdf;
ULONGLONG ReservedForCrt;
GUID EffectiveContainerId;
ULONGLONG LastSleepCounter; // Win11
ULONG SpinCallCount;
ULONGLONG ExtendedFeatureDisableMask;
PVOID SchedulerSharedDataSlot; // 24H2
PVOID HeapWalkContext;
GROUP_AFFINITY PrimaryGroupAffinity;
ULONG Rcu[2];
} TEB, *PTEB;
View code on GitHub
This structure is documented in Windows SDK.
Structure TEB
(Thread Environment Block) is memory block containing system variables placed in User-Mode memory. Every created thread have own TEB
block. User can get address of TEB
by call NtCurrentTeb
function.
Structure NT_TIB
is available in <WinNT.h> header file.
Pointer to PEB
structure contains Process Environment Block.
NtCurrentTeb
PEB
THREAD_BASIC_INFORMATION