/*++ Copyright (c) 1990 Microsoft Corporation Module Name: thread.c Abstract: This module implements Win32 Thread Object APIs Author: Mark Lucovsky (markl) 21-Sep-1990 Revision History: --*/ #include "basedll.h" #include "faultrep.h" HANDLE BasepDefaultTimerQueue ; ULONG BasepTimerQueueInitFlag ; ULONG BasepTimerQueueDoneFlag ; HANDLE APIENTRY CreateThread( LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId ) /*++ Routine Description: A thread object can be created to execute within the address space of the calling process using CreateThread. See CreateRemoteThread for a description of the arguments and return value. --*/ { return CreateRemoteThread( NtCurrentProcess(), lpThreadAttributes, dwStackSize, lpStartAddress, lpParameter, dwCreationFlags, lpThreadId ); } HANDLE APIENTRY CreateRemoteThread( HANDLE hProcess, LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId ) /*++ Routine Description: A thread object can be created to execute within the address space of the another process using CreateRemoteThread. Creating a thread causes a new thread of execution to begin in the address space of the current process. The thread has access to all objects opened by the process. The thread begins executing at the address specified by the StartAddress parameter. If the thread returns from this procedure, the results are un-specified. The thread remains in the system until it has terminated and all handles to the thread have been closed through a call to CloseHandle. When a thread terminates, it attains a state of signaled satisfying all waits on the object. In addition to the STANDARD_RIGHTS_REQUIRED access flags, the following object type specific access flags are valid for thread objects: - THREAD_QUERY_INFORMATION - This access is required to read certain information from the thread object. - SYNCHRONIZE - This access is required to wait on a thread object. - THREAD_GET_CONTEXT - This access is required to read the context of a thread using GetThreadContext. - THREAD_SET_CONTEXT - This access is required to write the context of a thread using SetThreadContext. - THREAD_SUSPEND_RESUME - This access is required to suspend or resume a thread using SuspendThread or ResumeThread. - THREAD_ALL_ACCESS - This set of access flags specifies all of the possible access flags for a thread object. Arguments: hProcess - Supplies the handle to the process in which the thread is to be create in. lpThreadAttributes - An optional parameter that may be used to specify the attributes of the new thread. If the parameter is not specified, then the thread is created without a security descriptor, and the resulting handle is not inherited on process creation. dwStackSize - Supplies the size in bytes of the stack for the new thread. A value of zero specifies that the thread's stack size should be the same size as the stack size of the first thread in the process. This size is specified in the application's executable file. lpStartAddress - Supplies the starting address of the new thread. The address is logically a procedure that never returns and that accepts a single 32-bit pointer argument. lpParameter - Supplies a single parameter value passed to the thread. dwCreationFlags - Supplies additional flags that control the creation of the thread. dwCreationFlags Flags: CREATE_SUSPENDED - The thread is created in a suspended state. The creator can resume this thread using ResumeThread. Until this is done, the thread will not begin execution. STACK_SIZE_PARAM_IS_A_RESERVATION - Use stack size as a reservation rather than commit lpThreadId - Returns the thread identifier of the thread. The thread ID is valid until the thread terminates. Return Value: NON-NULL - Returns a handle to the new thread. The handle has full access to the new thread and may be used in any API that requires a handle to a thread object. NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; OBJECT_ATTRIBUTES Obja; POBJECT_ATTRIBUTES pObja; HANDLE Handle; CONTEXT ThreadContext; INITIAL_TEB InitialTeb; CLIENT_ID ClientId; ULONG i; ACTIVATION_CONTEXT_BASIC_INFORMATION ActivationContextInfo = {0}; const ACTIVATION_CONTEXT_INFO_CLASS ActivationContextInfoClass = ActivationContextBasicInformation; #if !defined(BUILD_WOW6432) BASE_API_MSG m; PBASE_CREATETHREAD_MSG a = &m.u.CreateThread; #endif #if defined(WX86) || defined(_AXP64_) BOOL bWx86 = FALSE; HANDLE Wx86Info; PWX86TIB Wx86Tib; #endif // // Allocate a stack for this thread in the address space of the target // process. // if (dwCreationFlags&STACK_SIZE_PARAM_IS_A_RESERVATION) { Status = BaseCreateStack (hProcess, 0L, dwStackSize, &InitialTeb); } else { Status = BaseCreateStack (hProcess, dwStackSize, 0L, &InitialTeb); } if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return NULL; } // // Create an initial context for the new thread. // BaseInitializeContext( &ThreadContext, lpParameter, (PVOID)lpStartAddress, InitialTeb.StackBase, BaseContextTypeThread ); pObja = BaseFormatObjectAttributes(&Obja,lpThreadAttributes,NULL); Status = NtCreateThread( &Handle, THREAD_ALL_ACCESS, pObja, hProcess, &ClientId, &ThreadContext, &InitialTeb, TRUE // CreateSuspended ); if (!NT_SUCCESS(Status)) { BaseFreeThreadStack(hProcess,NULL, &InitialTeb); BaseSetLastNTError(Status); return NULL; } __try { // If the current thread has a non-default, inheriting activation context active, send it // on over to the new thread. if (hProcess == NtCurrentProcess()) { THREAD_BASIC_INFORMATION tbi; ULONG_PTR Cookie; // not really used but non-optional parameter // We need the TEB pointer for the new thread... Status = NtQueryInformationThread( Handle, ThreadBasicInformation, &tbi, sizeof(tbi), NULL); if (!NT_SUCCESS(Status)) { DbgPrint("SXS: %s - Failing thread create becuase NtQueryInformationThread() failed with status %08lx\n", __FUNCTION__, Status); __leave; } // There might be some per-context activation going on in the current thread; // we need to propogate it to the new thread. Status = RtlQueryInformationActivationContext( RTL_QUERY_INFORMATION_ACTIVATION_CONTEXT_FLAG_USE_ACTIVE_ACTIVATION_CONTEXT, NULL, 0, ActivationContextInfoClass, &ActivationContextInfo, sizeof(ActivationContextInfo), NULL ); if (!NT_SUCCESS(Status)) { DbgPrint("SXS: %s - Failing thread create because RtlQueryInformationActivationContext() failed with status %08lx\n", __FUNCTION__, Status); __leave; } // Only do the propogation if an activation context other than the process default is active and the NO_INHERIT flag isn't set. if ((ActivationContextInfo.ActivationContext != NULL) && (!(ActivationContextInfo.Flags & ACTIVATION_CONTEXT_FLAG_NO_INHERIT))) { Status = RtlActivateActivationContextEx( RTL_ACTIVATE_ACTIVATION_CONTEXT_EX_FLAG_RELEASE_ON_STACK_DEALLOCATION, tbi.TebBaseAddress, ActivationContextInfo.ActivationContext, &Cookie); if (!NT_SUCCESS(Status)) { DbgPrint("SXS: %s - Failing thread create because RtlActivateActivationContextEx() failed with status %08lx\n", __FUNCTION__, Status); __leave; } } } #if defined(WX86) || defined(_AXP64_) // // Check the Target Processes to see if this is a Wx86 process // Status = NtQueryInformationProcess(hProcess, ProcessWx86Information, &Wx86Info, sizeof(Wx86Info), NULL ); if (!NT_SUCCESS(Status)) { leave; } Wx86Tib = (PWX86TIB)NtCurrentTeb()->Vdm; // // if Wx86 process, setup for emulation // if ((ULONG_PTR)Wx86Info == sizeof(WX86TIB)) { // // create a WX86Tib and initialize it's Teb->Vdm. // Status = BaseCreateWx86Tib(hProcess, Handle, (ULONG)((ULONG_PTR)lpStartAddress), dwStackSize, 0L, (Wx86Tib && Wx86Tib->Size == sizeof(WX86TIB) && Wx86Tib->EmulateInitialPc) ); if (!NT_SUCCESS(Status)) { leave; } bWx86 = TRUE; } else if (Wx86Tib && Wx86Tib->EmulateInitialPc) { // // if not Wx86 process, and caller wants to call x86 code in that // process, fail the call. // Status = STATUS_ACCESS_DENIED; leave; } #endif // WX86 // // Call the Windows server to let it know about the // thread. // if ( !BaseRunningInServerProcess ) { #if defined(BUILD_WOW6432) Status = CsrBasepCreateThread(Handle, ClientId ); #else a->ThreadHandle = Handle; a->ClientId = ClientId; CsrClientCallServer( (PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepCreateThread ), sizeof( *a ) ); Status = m.ReturnValue; #endif } else { if (hProcess != NtCurrentProcess()) { CSRREMOTEPROCPROC ProcAddress; ProcAddress = (CSRREMOTEPROCPROC)GetProcAddress( GetModuleHandleA("csrsrv"), "CsrCreateRemoteThread" ); if (ProcAddress) { Status = (ProcAddress)(Handle, &ClientId); } } } if (!NT_SUCCESS(Status)) { Status = (NTSTATUS)STATUS_NO_MEMORY; } else { if ( ARGUMENT_PRESENT(lpThreadId) ) { *lpThreadId = HandleToUlong(ClientId.UniqueThread); } if (!( dwCreationFlags & CREATE_SUSPENDED) ) { NtResumeThread(Handle,&i); } } } __finally { if (ActivationContextInfo.ActivationContext != NULL) RtlReleaseActivationContext(ActivationContextInfo.ActivationContext); if (!NT_SUCCESS(Status)) { // // A second release is needed because we activated the activation context // on the new thread but we did not succeed in completing creation of the // thread. Had the thread been created, it would have deactivated the // activation context upon exit (RtlFreeThreadActivationContextStack). // This extra addref/releasing is triggered // by the flags ACTIVATE_ACTIVATION_CONTEXT_FLAG_RELEASE_ON_STACK_DEALLOCATION // and ACTIVATION_CONTEXT_STACK_FRAME_RELEASE_ON_DEACTIVATION. // if (ActivationContextInfo.ActivationContext != NULL) { RtlReleaseActivationContext(ActivationContextInfo.ActivationContext); } BaseFreeThreadStack(hProcess, Handle, &InitialTeb ); NtTerminateThread(Handle, Status); NtClose(Handle); BaseSetLastNTError(Status); Handle = NULL; } } return Handle; } NTSTATUS NTAPI BaseCreateThreadPoolThread( PUSER_THREAD_START_ROUTINE Function, PVOID Parameter, HANDLE * ThreadHandleReturn ) { NTSTATUS Status; RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME Frame = { sizeof(Frame), RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME_FORMAT_WHISTLER }; RtlActivateActivationContextUnsafeFast(&Frame, NULL); __try { *ThreadHandleReturn = CreateRemoteThread( NtCurrentProcess(), NULL, 0, (LPTHREAD_START_ROUTINE) Function, Parameter, CREATE_SUSPENDED, NULL); if (*ThreadHandleReturn) { Status = STATUS_SUCCESS; } else { Status = NtCurrentTeb()->LastStatusValue; if (NT_SUCCESS(Status)) { Status = STATUS_UNSUCCESSFUL; } } } __finally { RtlDeactivateActivationContextUnsafeFast(&Frame); } return Status; } NTSTATUS NTAPI BaseExitThreadPoolThread( NTSTATUS Status ) { ExitThread( (DWORD) Status ); return STATUS_SUCCESS ; } HANDLE WINAPI OpenThread( DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwThreadId ) /*++ Routine Description: A handle to a thread object may be created using OpenThread. Opening a thread creates a handle to the specified thread. Associated with the thread handle is a set of access rights that may be performed using the thread handle. The caller specifies the desired access to the thread using the DesiredAccess parameter. Arguments: mDesiredAccess - Supplies the desired access to the thread object. For NT/Win32, this access is checked against any security descriptor on the target thread. The following object type specific access flags can be specified in addition to the STANDARD_RIGHTS_REQUIRED access flags. DesiredAccess Flags: THREAD_TERMINATE - This access is required to terminate the thread using TerminateThread. THREAD_SUSPEND_RESUME - This access is required to suspend and resume the thread using SuspendThread and ResumeThread. THREAD_GET_CONTEXT - This access is required to use the GetThreadContext API on a thread object. THREAD_SET_CONTEXT - This access is required to use the SetThreadContext API on a thread object. THREAD_SET_INFORMATION - This access is required to set certain information in the thread object. THREAD_SET_THREAD_TOKEN - This access is required to set the thread token using SetTokenInformation. THREAD_QUERY_INFORMATION - This access is required to read certain information from the thread object. SYNCHRONIZE - This access is required to wait on a thread object. THREAD_ALL_ACCESS - This set of access flags specifies all of the possible access flags for a thread object. bInheritHandle - Supplies a flag that indicates whether or not the returned handle is to be inherited by a new process during process creation. A value of TRUE indicates that the new process will inherit the handle. dwThreadId - Supplies the thread id of the thread to open. Return Value: NON-NULL - Returns an open handle to the specified thread. The handle may be used by the calling process in any API that requires a handle to a thread. If the open is successful, the handle is granted access to the thread object only to the extent that it requested access through the DesiredAccess parameter. NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; OBJECT_ATTRIBUTES Obja; HANDLE Handle; CLIENT_ID ClientId; ClientId.UniqueThread = (HANDLE)LongToHandle(dwThreadId); ClientId.UniqueProcess = (HANDLE)NULL; InitializeObjectAttributes( &Obja, NULL, (bInheritHandle ? OBJ_INHERIT : 0), NULL, NULL ); Status = NtOpenThread( &Handle, (ACCESS_MASK)dwDesiredAccess, &Obja, &ClientId ); if ( NT_SUCCESS(Status) ) { return Handle; } else { BaseSetLastNTError(Status); return NULL; } } BOOL APIENTRY SetThreadPriority( HANDLE hThread, int nPriority ) /*++ Routine Description: The specified thread's priority can be set using SetThreadPriority. A thread's priority may be set using SetThreadPriority. This call allows the thread's relative execution importance to be communicated to the system. The system normally schedules threads according to their priority. The system is free to temporarily boost the priority of a thread when signifigant events occur (e.g. keyboard or mouse input...). Similarly, as a thread runs without blocking, the system will decay its priority. The system will never decay the priority below the value set by this call. In the absence of system originated priority boosts, threads will be scheduled in a round-robin fashion at each priority level from THREAD_PRIORITY_TIME_CRITICAL to THREAD_PRIORITY_IDLE. Only when there are no runnable threads at a higher level, will scheduling of threads at a lower level take place. All threads initially start at THREAD_PRIORITY_NORMAL. If for some reason the thread needs more priority, it can be switched to THREAD_PRIORITY_ABOVE_NORMAL or THREAD_PRIORITY_HIGHEST. Switching to THREAD_PRIORITY_TIME_CRITICAL should only be done in extreme situations. Since these threads are given the highes priority, they should only run in short bursts. Running for long durations will soak up the systems processing bandwidth starving threads at lower levels. If a thread needs to do low priority work, or should only run there is nothing else to do, its priority should be set to THREAD_PRIORITY_BELOW_NORMAL or THREAD_PRIORITY_LOWEST. For extreme cases, THREAD_PRIORITY_IDLE can be used. Care must be taken when manipulating priorites. If priorities are used carelessly (every thread is set to THREAD_PRIORITY_TIME_CRITICAL), the effects of priority modifications can produce undesireable effects (e.g. starvation, no effect...). Arguments: hThread - Supplies a handle to the thread whose priority is to be set. The handle must have been created with THREAD_SET_INFORMATION access. nPriority - Supplies the priority value for the thread. The following five priority values (ordered from lowest priority to highest priority) are allowed. nPriority Values: THREAD_PRIORITY_IDLE - The thread's priority should be set to the lowest possible settable priority. THREAD_PRIORITY_LOWEST - The thread's priority should be set to the next lowest possible settable priority. THREAD_PRIORITY_BELOW_NORMAL - The thread's priority should be set to just below normal. THREAD_PRIORITY_NORMAL - The thread's priority should be set to the normal priority value. This is the value that all threads begin execution at. THREAD_PRIORITY_ABOVE_NORMAL - The thread's priority should be set to just above normal priority. THREAD_PRIORITY_HIGHEST - The thread's priority should be set to the next highest possible settable priority. THREAD_PRIORITY_TIME_CRITICAL - The thread's priority should be set to the highest possible settable priority. This priority is very likely to interfere with normal operation of the system. Return Value: TRUE - The operation was successful FALSE/NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; LONG BasePriority; BasePriority = (LONG)nPriority; // // saturation is indicated by calling with a value of 16 or -16 // if ( BasePriority == THREAD_PRIORITY_TIME_CRITICAL ) { BasePriority = ((HIGH_PRIORITY + 1) / 2); } else if ( BasePriority == THREAD_PRIORITY_IDLE ) { BasePriority = -((HIGH_PRIORITY + 1) / 2); } Status = NtSetInformationThread( hThread, ThreadBasePriority, &BasePriority, sizeof(BasePriority) ); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } return TRUE; } int APIENTRY GetThreadPriority( HANDLE hThread ) /*++ Routine Description: The specified thread's priority can be read using GetThreadPriority. Arguments: hThread - Supplies a handle to the thread whose priority is to be set. The handle must have been created with THREAD_QUERY_INFORMATION access. Return Value: The value of the thread's current priority is returned. If an error occured, the value THREAD_PRIORITY_ERROR_RETURN is returned. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; THREAD_BASIC_INFORMATION BasicInfo; int returnvalue; Status = NtQueryInformationThread( hThread, ThreadBasicInformation, &BasicInfo, sizeof(BasicInfo), NULL ); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return (int)THREAD_PRIORITY_ERROR_RETURN; } returnvalue = (int)BasicInfo.BasePriority; if ( returnvalue == ((HIGH_PRIORITY + 1) / 2) ) { returnvalue = THREAD_PRIORITY_TIME_CRITICAL; } else if ( returnvalue == -((HIGH_PRIORITY + 1) / 2) ) { returnvalue = THREAD_PRIORITY_IDLE; } return returnvalue; } BOOL WINAPI SetThreadPriorityBoost( HANDLE hThread, BOOL bDisablePriorityBoost ) { NTSTATUS Status; ULONG DisableBoost; DisableBoost = bDisablePriorityBoost ? 1 : 0; Status = NtSetInformationThread( hThread, ThreadPriorityBoost, &DisableBoost, sizeof(DisableBoost) ); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } return TRUE; } BOOL WINAPI GetThreadPriorityBoost( HANDLE hThread, PBOOL pDisablePriorityBoost ) { NTSTATUS Status; DWORD DisableBoost; Status = NtQueryInformationThread( hThread, ThreadPriorityBoost, &DisableBoost, sizeof(DisableBoost), NULL ); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } *pDisablePriorityBoost = DisableBoost; return TRUE; } VOID APIENTRY ExitThread( DWORD dwExitCode ) /*++ Routine Description: The current thread can exit using ExitThread. ExitThread is the prefered method of exiting a thread. When this API is called (either explicitly or by returning from a thread procedure), The current thread's stack is deallocated and the thread terminates. If the thread is the last thread in the process when this API is called, the behavior of this API does not change. DLLs are not notified as a result of a call to ExitThread. Arguments: dwExitCode - Supplies the termination status for the thread. Return Value: None. --*/ { MEMORY_BASIC_INFORMATION MemInfo; NTSTATUS st; ULONG LastThread; PTEB Teb; #if DBG PRTL_CRITICAL_SECTION LoaderLock; #endif Teb = NtCurrentTeb(); #if DBG // // Assert on exiting while holding loader lock // LoaderLock = NtCurrentPeb()->LoaderLock; if (LoaderLock) { ASSERT(Teb->ClientId.UniqueThread != LoaderLock->OwningThread); } #endif st = NtQueryInformationThread( NtCurrentThread(), ThreadAmILastThread, &LastThread, sizeof(LastThread), NULL ); if ( st == STATUS_SUCCESS && LastThread ) { ExitProcess(dwExitCode); } else { RtlFreeThreadActivationContextStack(); LdrShutdownThread(); if (Teb->TlsExpansionSlots) { // // Serialize with TlsXXX functions so the kernel code that zero's tls slots // wont' trash heap // RtlAcquirePebLock(); try { RtlFreeHeap(RtlProcessHeap(),0,Teb->TlsExpansionSlots); Teb->TlsExpansionSlots = NULL; } finally { RtlReleasePebLock(); } } Teb->FreeStackOnTermination = TRUE; NtTerminateThread (NULL, (NTSTATUS)dwExitCode); ExitProcess(dwExitCode); } } BOOL APIENTRY TerminateThread( HANDLE hThread, DWORD dwExitCode ) /*++ Routine Description: A thread may be terminated using TerminateThread. TerminateThread is used to cause a thread to terminate user-mode execution. There is nothing a thread can to to predict or prevent when this occurs. If a process has a handle with appropriate termination access to the thread or to the threads process, then the thread can be unconditionally terminated without notice. When this occurs, the target thread has no chance to execute any user-mode code and its initial stack is not deallocated. The thread attains a state of signaled satisfying any waits on the thread. The thread's termination status is updated from its initial value of STATUS_PENDING to the value of the TerminationStatus parameter. Terminating a thread does not remove a thread from the system. The thread is not removed from the system until the last handle to the thread is closed. Arguments: hThread - Supplies a handle to the thread to terminate. The handle must have been created with THREAD_TERMINATE access. dwExitCode - Supplies the termination status for the thread. Return Value: TRUE - The operation was successful FALSE/NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; #if DBG PRTL_CRITICAL_SECTION LoaderLock; HANDLE ThreadId; THREAD_BASIC_INFORMATION ThreadInfo; #endif if ( hThread == NULL ) { SetLastError(ERROR_INVALID_HANDLE); return FALSE; } // // Assert on suicide while holding loader lock // #if DBG LoaderLock = NtCurrentPeb()->LoaderLock; if (LoaderLock) { Status = NtQueryInformationThread( hThread, ThreadBasicInformation, &ThreadInfo, sizeof(ThreadInfo), NULL ); if (NT_SUCCESS(Status)) { ASSERT( NtCurrentTeb()->ClientId.UniqueThread != ThreadInfo.ClientId.UniqueThread || NtCurrentTeb()->ClientId.UniqueThread != LoaderLock->OwningThread); } } #endif Status = NtTerminateThread(hThread,(NTSTATUS)dwExitCode); if ( NT_SUCCESS(Status) ) { return TRUE; } else { BaseSetLastNTError(Status); return FALSE; } } BOOL APIENTRY GetExitCodeThread( HANDLE hThread, LPDWORD lpExitCode ) /*++ Routine Description: The termination status of a thread can be read using GetExitCodeThread. If a Thread is in the signaled state, calling this function returns the termination status of the thread. If the thread is not yet signaled, the termination status returned is STILL_ACTIVE. Arguments: hThread - Supplies a handle to the thread whose termination status is to be read. The handle must have been created with THREAD_QUERY_INFORMATION access. lpExitCode - Returns the current termination status of the thread. Return Value: TRUE - The operation was successful FALSE/NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; THREAD_BASIC_INFORMATION BasicInformation; Status = NtQueryInformationThread( hThread, ThreadBasicInformation, &BasicInformation, sizeof(BasicInformation), NULL ); if ( NT_SUCCESS(Status) ) { *lpExitCode = BasicInformation.ExitStatus; return TRUE; } else { BaseSetLastNTError(Status); return FALSE; } } HANDLE APIENTRY GetCurrentThread( VOID ) /*++ Routine Description: A pseudo handle to the current thread may be retrieved using GetCurrentThread. A special constant is exported by Win32 that is interpreted as a handle to the current thread. This handle may be used to specify the current thread whenever a thread handle is required. On Win32, this handle has THREAD_ALL_ACCESS to the current thread. On NT/Win32, this handle has the maximum access allowed by any security descriptor placed on the current thread. Arguments: None. Return Value: Returns the pseudo handle of the current thread. --*/ { return NtCurrentThread(); } DWORD APIENTRY GetCurrentThreadId( VOID ) /*++ Routine Description: The thread ID of the current thread may be retrieved using GetCurrentThreadId. Arguments: None. Return Value: Returns a unique value representing the thread ID of the currently executing thread. The return value may be used to identify a thread in the system. --*/ { return HandleToUlong(NtCurrentTeb()->ClientId.UniqueThread); } BOOL APIENTRY GetThreadContext( HANDLE hThread, LPCONTEXT lpContext ) /*++ Routine Description: The context of a specified thread can be retreived using GetThreadContext. This function is used to retreive the context of the specified thread. The API allows selective context to be retrieved based on the value of the ContextFlags field of the context structure. The specified thread does not have to be being debugged in order for this API to operate. The caller must simply have a handle to the thread that was created with THREAD_GET_CONTEXT access. Arguments: hThread - Supplies an open handle to a thread whose context is to be retreived. The handle must have been created with THREAD_GET_CONTEXT access to the thread. lpContext - Supplies the address of a context structure that receives the appropriate context of the specified thread. The value of the ContextFlags field of this structure specifies which portions of a threads context are to be retreived. The context structure is highly machine specific. There are currently two versions of the context structure. One version exists for x86 processors, and another exists for MIPS processors. Return Value: TRUE - The operation was successful. FALSE/NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; Status = NtGetContextThread(hThread,lpContext); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } else { return TRUE; } } BOOL APIENTRY SetThreadContext( HANDLE hThread, CONST CONTEXT *lpContext ) /*++ Routine Description: This function is used to set the context in the specified thread. The API allows selective context to be set based on the value of the ContextFlags field of the context structure. The specified thread does not have to be being debugged in order for this API to operate. The caller must simply have a handle to the thread that was created with THREAD_SET_CONTEXT access. Arguments: hThread - Supplies an open handle to a thread whose context is to be written. The handle must have been created with THREAD_SET_CONTEXT access to the thread. lpContext - Supplies the address of a context structure that contains the context that is to be set in the specified thread. The value of the ContextFlags field of this structure specifies which portions of a threads context are to be set. Some values in the context structure are not settable and are silently set to the correct value. This includes cpu status register bits that specify the priviledged processor mode, debug register global enabling bits, and other state that must be completely controlled by the operating system. Return Value: TRUE - The operation was successful. FALSE/NULL - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; Status = NtSetContextThread(hThread,(PCONTEXT)lpContext); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } else { return TRUE; } } DWORD APIENTRY SuspendThread( HANDLE hThread ) /*++ Routine Description: A thread can be suspended using SuspendThread. Suspending a thread causes the thread to stop executing user-mode (or application) code. Each thread has a suspend count (with a maximum value of MAXIMUM_SUSPEND_COUNT). If the suspend count is greater than zero, the thread is suspended; otherwise, the thread is not suspended and is eligible for execution. Calling SuspendThread causes the target thread's suspend count to increment. Attempting to increment past the maximum suspend count causes an error without incrementing the count. Arguments: hThread - Supplies a handle to the thread that is to be suspended. The handle must have been created with THREAD_SUSPEND_RESUME access to the thread. Return Value: -1 - The operation failed. Extended error status is available using GetLastError. Other - The target thread was suspended. The return value is the thread's previous suspend count. --*/ { NTSTATUS Status; DWORD PreviousSuspendCount; Status = NtSuspendThread(hThread,&PreviousSuspendCount); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return (DWORD)-1; } else { return PreviousSuspendCount; } } DWORD APIENTRY ResumeThread( IN HANDLE hThread ) /*++ Routine Description: A thread can be resumed using ResumeThread. Resuming a thread object checks the suspend count of the subject thread. If the suspend count is zero, then the thread is not currently suspended and no operation is performed. Otherwise, the subject thread's suspend count is decremented. If the resultant value is zero , then the execution of the subject thread is resumed. The previous suspend count is returned as the function value. If the return value is zero, then the subject thread was not previously suspended. If the return value is one, then the subject thread's the subject thread is still suspended and must be resumed the number of times specified by the return value minus one before it will actually resume execution. Note that while reporting debug events, all threads withing the reporting process are frozen. This has nothing to do with SuspendThread or ResumeThread. Debuggers are expected to use SuspendThread and ResumeThread to limit the set of threads that can execute within a process. By suspending all threads in a process except for the one reporting a debug event, it is possible to "single step" a single thread. The other threads will not be released by a continue if they are suspended. Arguments: hThread - Supplies a handle to the thread that is to be resumed. The handle must have been created with THREAD_SUSPEND_RESUME access to the thread. Return Value: -1 - The operation failed. Extended error status is available using GetLastError. Other - The target thread was resumed (or was not previously suspended). The return value is the thread's previous suspend count. --*/ { NTSTATUS Status; DWORD PreviousSuspendCount; Status = NtResumeThread(hThread,&PreviousSuspendCount); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return (DWORD)-1; } else { return PreviousSuspendCount; } } VOID APIENTRY RaiseException( DWORD dwExceptionCode, DWORD dwExceptionFlags, DWORD nNumberOfArguments, CONST ULONG_PTR *lpArguments ) /*++ Routine Description: Raising an exception causes the exception dispatcher to go through its search for an exception handler. This includes debugger notification, frame based handler searching, and system default actions. Arguments: dwExceptionCode - Supplies the exception code of the exception being raised. This value may be obtained in exception filters and in exception handlers by calling GetExceptionCode. dwExceptionFlags - Supplies a set of flags associated with the exception. dwExceptionFlags Flags: EXCEPTION_NONCONTINUABLE - The exception is non-continuable. Returning EXCEPTION_CONTINUE_EXECUTION from an exception marked in this way causes the STATUS_NONCONTINUABLE_EXCEPTION exception. nNumberOfArguments - Supplies the number of arguments associated with the exception. This value may not exceed EXCEPTION_MAXIMUM_PARAMETERS. This parameter is ignored if lpArguments is NULL. lpArguments - An optional parameter, that if present supplies the arguments for the exception. Return Value: None. --*/ { EXCEPTION_RECORD ExceptionRecord; ULONG n; PULONG_PTR s,d; ExceptionRecord.ExceptionCode = (DWORD)dwExceptionCode; ExceptionRecord.ExceptionFlags = dwExceptionFlags & EXCEPTION_NONCONTINUABLE; ExceptionRecord.ExceptionRecord = NULL; ExceptionRecord.ExceptionAddress = (PVOID)RaiseException; if ( ARGUMENT_PRESENT(lpArguments) ) { n = nNumberOfArguments; if ( n > EXCEPTION_MAXIMUM_PARAMETERS ) { n = EXCEPTION_MAXIMUM_PARAMETERS; } ExceptionRecord.NumberParameters = n; s = (PULONG_PTR)lpArguments; d = ExceptionRecord.ExceptionInformation; while(n--){ *d++ = *s++; } } else { ExceptionRecord.NumberParameters = 0; } RtlRaiseException(&ExceptionRecord); } UINT GetErrorMode(); BOOLEAN BasepAlreadyHadHardError = FALSE; LPTOP_LEVEL_EXCEPTION_FILTER BasepCurrentTopLevelFilter; LPTOP_LEVEL_EXCEPTION_FILTER WINAPI SetUnhandledExceptionFilter( LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter ) /*++ Routine Description: This function allows an application to supersede the top level exception handler that Win32 places at the top of each thread and process. If an exception occurs, and it makes it to the Win32 unhandled exception filter, and the process is not being debugged, the Win32 filter will call the unhandled exception filter specified by lpTopLevelExceptionFilter. This filter may return: EXCEPTION_EXECUTE_HANDLER - Return from the Win32 UnhandledExceptionFilter and execute the associated exception handler. This will usually result in process termination EXCEPTION_CONTINUE_EXECUTION - Return from the Win32 UnhandledExceptionFilter and continue execution from the point of the exception. The filter is of course free to modify the continuation state my modifying the passed exception information. EXCEPTION_CONTINUE_SEARCH - Proceed with normal execution of the Win32 UnhandledExceptionFilter. e.g. obey the SetErrorMode flags, or invoke the Application Error popup. This function is not a general vectored exception handling mechanism. It is intended to be used to establish a per-process exception filter that can monitor unhandled exceptions at the process level and respond to these exceptions appropriately. Arguments: lpTopLevelExceptionFilter - Supplies the address of a top level filter function that will be called whenever the Win32 UnhandledExceptionFilter gets control, and the process is NOT being debugged. A value of NULL specifies default handling within the Win32 UnhandledExceptionFilter. Return Value: This function returns the address of the previous exception filter established with this API. A value of NULL means that there is no current top level handler. --*/ { LPTOP_LEVEL_EXCEPTION_FILTER PreviousTopLevelFilter; PreviousTopLevelFilter = BasepCurrentTopLevelFilter; BasepCurrentTopLevelFilter = lpTopLevelExceptionFilter; return PreviousTopLevelFilter; } LONG BasepCheckForReadOnlyResource( PVOID Va ) { SIZE_T RegionSize; ULONG OldProtect; NTSTATUS Status; MEMORY_BASIC_INFORMATION MemInfo; PIMAGE_RESOURCE_DIRECTORY ResourceDirectory; ULONG ResourceSize; char *rbase, *va; LONG ReturnValue; // // Locate the base address that continas this va // Status = NtQueryVirtualMemory( NtCurrentProcess(), Va, MemoryBasicInformation, (PVOID)&MemInfo, sizeof(MemInfo), NULL ); if ( !NT_SUCCESS(Status) ) { return EXCEPTION_CONTINUE_SEARCH; } // // if the va is readonly and in an image then continue // if ( !((MemInfo.Protect == PAGE_READONLY) && (MemInfo.Type == MEM_IMAGE)) ){ return EXCEPTION_CONTINUE_SEARCH; } ReturnValue = EXCEPTION_CONTINUE_SEARCH; try { ResourceDirectory = (PIMAGE_RESOURCE_DIRECTORY) RtlImageDirectoryEntryToData(MemInfo.AllocationBase, TRUE, IMAGE_DIRECTORY_ENTRY_RESOURCE, &ResourceSize ); rbase = (char *)ResourceDirectory; va = (char *)Va; if ( rbase && va >= rbase && va < rbase+ResourceSize ) { RegionSize = 1; Status = NtProtectVirtualMemory( NtCurrentProcess(), &va, &RegionSize, PAGE_READWRITE, &OldProtect ); if ( NT_SUCCESS(Status) ) { ReturnValue = EXCEPTION_CONTINUE_EXECUTION; } } } except (EXCEPTION_EXECUTE_HANDLER) { ; } return ReturnValue; } // // Used for fault reporting in UnhandledExceptionFilter // static CHAR *StrStrIA(const CHAR *cs1, const CHAR *cs2) { CHAR *cp = (CHAR *)cs1; CHAR *s1, *s2; while (*cp != '\0') { s1 = cp; s2 = (CHAR *)cs2; while (*s1 != '\0' && *s2 !='\0' && (tolower(*s1) - tolower(*s2)) == 0) s1++, s2++; if (*s2 == '\0') return(cp); cp++; } return(NULL); } #if 0 //#ifdef _X86_ LPVOID g_pvStack = NULL; // need to turn this warning off due to the fact that we jump directly to // a function in the assembly below. #pragma warning(disable : 4414) // define the new stack size to be 0.5MB #define NEWSTACKSIZE 128 * 4096 LONG UnhandledExceptionFilterEx(struct _EXCEPTION_POINTERS *ExceptionInfo); // In the case of x86, use this wrapper function to detect if we've hit a // stack overflow or not. If we have, it's possibly that we'll AV at some // point in this function due to growing the stack out of the last stack // page. So we want to work around it by allocating a new stack and using // that for the exception filter. // Need to use __declspec(naked) to make sure that the compiler doesn't start // pushing stuff onto the stack in the fn prologue __declspec(naked) LONG UnhandledExceptionFilter( struct _EXCEPTION_POINTERS *ExceptionInfo ) { _asm { // if it isn't a stack overflow exception, we don't have to worry about // using stack space. Need to use a jmp call here because I can't use // 'return' in a naked function & I want to use as little stack space // as possible. The jmp means that UnhandledExceptionFilterEx will take // care of cleaning up the stack. // if (ExceptionInfo->ExceptionRecord->ExceptionCode != EXCEPTION_STACK_OVERFLOW) // goto UnhandledExceptionFilterEx mov eax, [esp+4] mov ecx, [eax] cmp dword ptr [ecx], 0xC00000FD jne UnhandledExceptionFilterEx // allocate the new stack // pvStack = VirtualAlloc(NULL, NEWSTACKSIZE, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); push PAGE_READWRITE // Protection push MEM_RESERVE | MEM_COMMIT // Allocation push NEWSTACKSIZE // Size push 0 // Address call dword ptr [VirtualAlloc] // if the call to VirtualAlloc failed, we can't do much else. Just let // the filter take over & possibly fail. // if (pvStack == NULL) // UnhandledExceptionFilterEx(); test eax, eax jz UnhandledExceptionFilterEx // Stack grows top down, so set the top of the stack appropriately // g_pvStack += NEWSTACKSIZE; lea eax, [eax+NEWSTACKSIZE] // @edx = pExceptionInfo mov edx, [esp+4] // Push old esp on new stack; point stack pointer to new stack mov [eax-4], esp mov [eax-8], esi mov esi, eax lea esp, [eax-16] // GeneralUnhandledExceptionFilterEx(pExceptionInfo); push edx call UnhandledExceptionFilterEx // Reset the old stack pointer mov edx, esi mov esi, [edx-8] mov esp, [edx-4] // We need to now free up the memory we allocated above. It's necessary // to free it up because the app could have registered a global // exception filter & it could have done some magic to let the process // remain alive. If we knew we were terminating now, we could just // let it go and have the system take care of it, but we don't so we // can't. // we need to return the result of UnhandledExceptionFilterEx which is // currently in @eax. However, VirtualFree will trash @eax so we // gotta save it. Use the 4 bytes on the stack where pExceptionInfo // parameter is sitting to store @eax. We don't need that value // anymore and we're going to reclaim that space anyway at the end of // this fn. mov [esp+4], eax // g_pvStack -= NEWSTACKSIZE lea eax, [edx-NEWSTACKSIZE] // VirtualFree(pStack, 0, MEM_DECOMMIT | MEM_RELEASE); push MEM_RELEASE push 0 push eax call dword ptr [VirtualFree] // move the result of the call to UnhandledExceptionFilterEx back into // @eax mov eax, [esp+4] // pop 4 bytes off the stack cuz that's what the calling function // pushed on ret 4 } } #pragma warning(default : 4414) // The real exception filter that we call after munging the stack LONG UnhandledExceptionFilterEx( struct _EXCEPTION_POINTERS *ExceptionInfo ) #else LONG UnhandledExceptionFilter( struct _EXCEPTION_POINTERS *ExceptionInfo ) #endif { EFaultRepRetVal frrv = frrvErrNoDW; NTSTATUS Status; ULONG_PTR Parameters[ 4 ]; ULONG Response; HANDLE DebugPort; CHAR AeDebuggerCmdLine[256]; CHAR AeAutoDebugString[8]; BOOLEAN AeAutoDebug; ULONG ResponseFlag; LONG FilterReturn; PRTL_CRITICAL_SECTION PebLockPointer; JOBOBJECT_BASIC_LIMIT_INFORMATION BasicLimit; // // If we take a write fault, then attempt to make the memory writable. If this // succeeds, then silently proceed. // if ( ExceptionInfo->ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION && ExceptionInfo->ExceptionRecord->ExceptionInformation[0] ) { FilterReturn = BasepCheckForReadOnlyResource((PVOID)ExceptionInfo->ExceptionRecord->ExceptionInformation[1]); if ( FilterReturn == EXCEPTION_CONTINUE_EXECUTION ) { return FilterReturn; } } // // If the process is being debugged, just let the exception happen // so that the debugger can see it. This way the debugger can ignore // all first chance exceptions. // DebugPort = (HANDLE)NULL; Status = NtQueryInformationProcess( GetCurrentProcess(), ProcessDebugPort, (PVOID)&DebugPort, sizeof(DebugPort), NULL ); if ( NT_SUCCESS(Status) && DebugPort ) { // // Output a verifier_stop message for certain exception codes // if app_verifier is enabled and process runs under debugger. // if ((NtCurrentPeb()->NtGlobalFlag & FLG_APPLICATION_VERIFIER)) { static LONG NoMessageYet = 0; if (ExceptionInfo->ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION) { if (InterlockedExchange(&NoMessageYet, 1) == 0) { VERIFIER_STOP (APPLICATION_VERIFIER_ACCESS_VIOLATION | APPLICATION_VERIFIER_NO_BREAK, "access violation exception for current stack trace", ExceptionInfo->ExceptionRecord->ExceptionInformation[1], "Invalid address being accessed", ExceptionInfo->ExceptionRecord->ExceptionAddress, "Code performing invalid access", ExceptionInfo->ExceptionRecord, ".exr (exception record)", ExceptionInfo->ContextRecord, ".cxr (context record)"); } } if (ExceptionInfo->ExceptionRecord->ExceptionCode == STATUS_INVALID_HANDLE) { if (InterlockedExchange(&NoMessageYet, 1) == 0) { VERIFIER_STOP (APPLICATION_VERIFIER_INVALID_HANDLE | APPLICATION_VERIFIER_NO_BREAK, "invalid handle exception for current stack trace", 0, NULL, 0, NULL, 0, NULL, 0, NULL); } } } // // Process is being debugged. // Return a code that specifies that the exception // processing is to continue // return EXCEPTION_CONTINUE_SEARCH; } if ( BasepCurrentTopLevelFilter ) { FilterReturn = (BasepCurrentTopLevelFilter)(ExceptionInfo); if ( FilterReturn == EXCEPTION_EXECUTE_HANDLER || FilterReturn == EXCEPTION_CONTINUE_EXECUTION ) { return FilterReturn; } } if ( GetErrorMode() & SEM_NOGPFAULTERRORBOX ) { return EXCEPTION_EXECUTE_HANDLER; } // // See if the process's job has been programmed to NOGPFAULTERRORBOX // Status = NtQueryInformationJobObject( NULL, JobObjectBasicLimitInformation, &BasicLimit, sizeof(BasicLimit), NULL ); if ( NT_SUCCESS(Status) && (BasicLimit.LimitFlags & JOB_OBJECT_LIMIT_DIE_ON_UNHANDLED_EXCEPTION) ) { return EXCEPTION_EXECUTE_HANDLER; } // // The process is not being debugged, so do the hard error // popup. // Parameters[ 0 ] = (ULONG_PTR)ExceptionInfo->ExceptionRecord->ExceptionCode; Parameters[ 1 ] = (ULONG_PTR)ExceptionInfo->ExceptionRecord->ExceptionAddress; // // For inpage i/o errors, juggle the real status code to overwrite the // read/write field // if ( ExceptionInfo->ExceptionRecord->ExceptionCode == STATUS_IN_PAGE_ERROR ) { Parameters[ 2 ] = ExceptionInfo->ExceptionRecord->ExceptionInformation[ 2 ]; } else { Parameters[ 2 ] = ExceptionInfo->ExceptionRecord->ExceptionInformation[ 0 ]; } Parameters[ 3 ] = ExceptionInfo->ExceptionRecord->ExceptionInformation[ 1 ]; // // See if a debugger has been programmed in. If so, use the // debugger specified. If not then there is no AE Cancel support // DEVL systems will default the debugger command line. Retail // systems will not. // Also, check to see if we need to report the exception up to anyone // ResponseFlag = OptionOk; AeAutoDebug = FALSE; // // If we are holding the PebLock, then the createprocess will fail // because a new thread will also need this lock. Avoid this by peeking // inside the PebLock and looking to see if we own it. If we do, then just allow // a regular popup. // PebLockPointer = NtCurrentPeb()->FastPebLock; if ( PebLockPointer->OwningThread != NtCurrentTeb()->ClientId.UniqueThread ) { PRTL_CRITICAL_SECTION LoaderLockPointer; HMODULE hmodFaultRep = NULL; try { if ( GetProfileString( "AeDebug", "Debugger", NULL, AeDebuggerCmdLine, sizeof(AeDebuggerCmdLine)-1 ) ) { ResponseFlag = OptionOkCancel; } if ( GetProfileString( "AeDebug", "Auto", "0", AeAutoDebugString, sizeof(AeAutoDebugString)-1 ) ) { if ( !strcmp(AeAutoDebugString,"1") ) { if ( ResponseFlag == OptionOkCancel ) { AeAutoDebug = TRUE; } } } // // Attempt to report the fault back to Microsoft. ReportFault // will return the following: // frrvErrNoDW: Always show our own fault notification. // // frrvErrTimeout: see frrvOkHeadless // frrvOkQueued: see frrvOkHeadless // frrvOkHeadless: If we need to ask whether to launch a debugger, // then we ask. Otherwise, show nothing else. // // frrvOk: see frrvOkManifest // frrvOkManifest: We're done. Show nothing else. // // frrvLaunchDebugger: Launch the configured debugger. // LoaderLockPointer = NtCurrentPeb()->LoaderLock; frrv = frrvErrNoDW; if ( BasepAlreadyHadHardError == FALSE && LoaderLockPointer->OwningThread != NtCurrentTeb()->ClientId.UniqueThread && ( AeAutoDebug == FALSE || StrStrIA(AeDebuggerCmdLine, "drwtsn32") != NULL )) { WCHAR wszDll[MAX_PATH]; PVOID pvLdrLockCookie; ULONG ulLockState; wszDll[0] = 0; if (GetSystemDirectoryW(wszDll, sizeof(wszDll) / sizeof(WCHAR))) wcscat(wszDll, L"\\faultrep.dll"); else wszDll[0] = 0; // make sure that no one else owns the loader lock because we // could otherwise deadlock LdrLockLoaderLock(LDR_LOCK_LOADER_LOCK_FLAG_TRY_ONLY, &ulLockState, &pvLdrLockCookie); if (ulLockState == LDR_LOCK_LOADER_LOCK_DISPOSITION_LOCK_ACQUIRED) { hmodFaultRep = LoadLibraryExW(wszDll, NULL, 0); LdrUnlockLoaderLock(0, pvLdrLockCookie); } if (hmodFaultRep != NULL) { pfn_REPORTFAULT pfn; DWORD dwDebug; // parameter 2 to ReportFault should be: // froNoDebugWait: don't display a debug button but wait // for DW to finish- this is a special // case to make sure DW is done before // Dr. Watson starts // froNoDebugWait : don't display a debug button // froDebug : display a debug button and wait for DW to // finish if (ResponseFlag == OptionOkCancel) dwDebug = (AeAutoDebug) ? froNoDebugWait : froDebug; else dwDebug = froNoDebug; pfn = (pfn_REPORTFAULT)GetProcAddress(hmodFaultRep, "ReportFault"); if (pfn != NULL) frrv = (*pfn)(ExceptionInfo, dwDebug); FreeLibrary(hmodFaultRep); hmodFaultRep = NULL; } } // // Since we're supposed to launch the debugger anyway, just set the // AeAutoDebug flag to true to minimize code munging below // if ( frrv == frrvLaunchDebugger ) AeAutoDebug = TRUE; } except (EXCEPTION_EXECUTE_HANDLER) { ResponseFlag = OptionOk; AeAutoDebug = FALSE; frrv = frrvErrNoDW; if (hmodFaultRep != NULL) FreeLibrary(hmodFaultRep); } } // // only display this dialog if we couldn't show DW & we're not set to // automatically launch a debugger. The conditions here are: // 1. cannot be directly launching a debugger (auto == 1) // 2a. DW must have failed to launch // -or- // we needed to ask the user if he wanted to debug but could not (due // to either no UI being shown or us not being able to wait long enuf // to find out.) if ( !AeAutoDebug && ( frrv == frrvErrNoDW || ( ResponseFlag == OptionOkCancel && ( frrv == frrvErrTimeout || frrv == frrvOkQueued || frrv == frrvOkHeadless ) ) ) ) { Status =NtRaiseHardError( STATUS_UNHANDLED_EXCEPTION | HARDERROR_OVERRIDE_ERRORMODE, 4, 0, Parameters, BasepAlreadyHadHardError ? OptionOk : ResponseFlag, &Response ); } else { Status = STATUS_SUCCESS; Response = (AeAutoDebug) ? ResponseCancel : ResponseOk; } // // Internally, send OkCancel. If we get back Ok then die. // If we get back Cancel, then enter the debugger // if ( NT_SUCCESS(Status) && Response == ResponseCancel && BasepAlreadyHadHardError == FALSE) { if ( !BaseRunningInServerProcess ) { BOOL b; STARTUPINFO StartupInfo; PROCESS_INFORMATION ProcessInformation; CHAR CmdLine[256]; NTSTATUS Status; HANDLE EventHandle; SECURITY_ATTRIBUTES sa; HANDLE CurrentProcess; HANDLE CurrentThread; // // Duplicate the processes handle. We make it inheritable so the debugger will get a copy of it. // We do this to prevent the process ID from being reused if this process gets killed before the // attach occurs. Process ID are reused very quickly and attaching to the wrong process is // confusing. // if (!DuplicateHandle (GetCurrentProcess (), GetCurrentProcess (), GetCurrentProcess (), &CurrentProcess, 0, TRUE, DUPLICATE_SAME_ACCESS)) { CurrentProcess = NULL; } if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), GetCurrentProcess (), &CurrentThread, 0, TRUE, DUPLICATE_SAME_ACCESS)) { CurrentThread = NULL; } sa.nLength = sizeof(sa); sa.lpSecurityDescriptor = NULL; sa.bInheritHandle = TRUE; EventHandle = CreateEvent(&sa,TRUE,FALSE,NULL); RtlZeroMemory(&StartupInfo,sizeof(StartupInfo)); sprintf(CmdLine,AeDebuggerCmdLine,GetCurrentProcessId(),EventHandle); StartupInfo.cb = sizeof(StartupInfo); StartupInfo.lpDesktop = "Winsta0\\Default"; CsrIdentifyAlertableThread(); b = CreateProcess( NULL, CmdLine, NULL, NULL, TRUE, 0, NULL, NULL, &StartupInfo, &ProcessInformation ); if (CurrentProcess != NULL) { CloseHandle (CurrentProcess); } if (CurrentThread != NULL) { CloseHandle (CurrentThread); } if ( b && EventHandle) { // // Do an alertable wait on the event // do { HANDLE WaitHandles[2]; WaitHandles[0] = EventHandle; WaitHandles[1] = ProcessInformation.hProcess; Status = NtWaitForMultipleObjects (2, WaitHandles, WaitAny, TRUE, NULL); } while (Status == STATUS_USER_APC || Status == STATUS_ALERTED); // // If the debugger process died then see if the debugger is now // attached by another thread // if (Status == 1) { Status = NtQueryInformationProcess (GetCurrentProcess(), ProcessDebugPort, &DebugPort, sizeof (DebugPort), NULL); if (!NT_SUCCESS (Status) || DebugPort == NULL) { BasepAlreadyHadHardError = TRUE; } } CloseHandle (EventHandle); CloseHandle (ProcessInformation.hProcess); CloseHandle (ProcessInformation.hThread); return EXCEPTION_CONTINUE_SEARCH; } } BasepAlreadyHadHardError = TRUE; } #if DBG if (!NT_SUCCESS( Status )) { DbgPrint( "BASEDLL: Unhandled exception: %lx IP: %x\n", ExceptionInfo->ExceptionRecord->ExceptionCode, ExceptionInfo->ExceptionRecord->ExceptionAddress ); } #endif if ( BasepAlreadyHadHardError ) { NtTerminateProcess(NtCurrentProcess(),ExceptionInfo->ExceptionRecord->ExceptionCode); } return EXCEPTION_EXECUTE_HANDLER; } DWORD APIENTRY TlsAlloc( VOID ) /*++ Routine Description: A TLS index may be allocated using TlsAlloc. Win32 garuntees a minimum number of TLS indexes are available in each process. The constant TLS_MINIMUM_AVAILABLE defines the minimum number of available indexes. This minimum is at least 64 for all Win32 systems. Arguments: None. Return Value: Not-0xffffffff - Returns a TLS index that may be used in a subsequent call to TlsFree, TlsSetValue, or TlsGetValue. The storage associated with the index is initialized to NULL. 0xffffffff - The operation failed. Extended error status is available using GetLastError. --*/ { PPEB Peb; PTEB Teb; DWORD Index; Peb = NtCurrentPeb(); Teb = NtCurrentTeb(); RtlAcquirePebLock(); try { Index = RtlFindClearBitsAndSet((PRTL_BITMAP)Peb->TlsBitmap,1,0); if ( Index == 0xffffffff ) { Index = RtlFindClearBitsAndSet((PRTL_BITMAP)Peb->TlsExpansionBitmap,1,0); if ( Index == 0xffffffff ) { BaseSetLastNTError(STATUS_NO_MEMORY); } else { if ( !Teb->TlsExpansionSlots ) { Teb->TlsExpansionSlots = RtlAllocateHeap( RtlProcessHeap(), MAKE_TAG( TMP_TAG ) | HEAP_ZERO_MEMORY, TLS_EXPANSION_SLOTS * sizeof(PVOID) ); if ( !Teb->TlsExpansionSlots ) { RtlClearBits((PRTL_BITMAP)Peb->TlsExpansionBitmap,Index,1); Index = 0xffffffff; BaseSetLastNTError(STATUS_NO_MEMORY); return Index; } } Teb->TlsExpansionSlots[Index] = NULL; Index += TLS_MINIMUM_AVAILABLE; } } else { Teb->TlsSlots[Index] = NULL; } } finally { RtlReleasePebLock(); } return Index; } LPVOID APIENTRY TlsGetValue( DWORD dwTlsIndex ) /*++ Routine Description: This function is used to retrive the value in the TLS storage associated with the specified index. If the index is valid this function clears the value returned by GetLastError(), and returns the value stored in the TLS slot associated with the specified index. Otherwise a value of NULL is returned with GetLastError updated appropriately. It is expected, that DLLs will use TlsAlloc and TlsGetValue as follows: - Upon DLL initialization, a TLS index will be allocated using TlsAlloc. The DLL will then allocate some dynamic storage and store its address in the TLS slot using TlsSetValue. This completes the per thread initialization for the initial thread of the process. The TLS index is stored in instance data for the DLL. - Each time a new thread attaches to the DLL, the DLL will allocate some dynamic storage and store its address in the TLS slot using TlsSetValue. This completes the per thread initialization for the new thread. - Each time an initialized thread makes a DLL call requiring the TLS, the DLL will call TlsGetValue to get the TLS data for the thread. Arguments: dwTlsIndex - Supplies a TLS index allocated using TlsAlloc. The index specifies which TLS slot is to be located. Translating a TlsIndex does not prevent a TlsFree call from proceding. Return Value: NON-NULL - The function was successful. The value is the data stored in the TLS slot associated with the specified index. NULL - The operation failed, or the value associated with the specified index was NULL. Extended error status is available using GetLastError. If this returns non-zero, the index was invalid. --*/ { PTEB Teb; LPVOID *Slot; Teb = NtCurrentTeb(); if ( dwTlsIndex < TLS_MINIMUM_AVAILABLE ) { Slot = &Teb->TlsSlots[dwTlsIndex]; Teb->LastErrorValue = 0; return *Slot; } else { if ( dwTlsIndex >= TLS_MINIMUM_AVAILABLE+TLS_EXPANSION_SLOTS ) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return NULL; } else { Teb->LastErrorValue = 0; if ( Teb->TlsExpansionSlots ) { return Teb->TlsExpansionSlots[dwTlsIndex-TLS_MINIMUM_AVAILABLE]; } else { return NULL; } } } } BOOL APIENTRY TlsSetValue( DWORD dwTlsIndex, LPVOID lpTlsValue ) /*++ Routine Description: This function is used to store a value in the TLS storage associated with the specified index. If the index is valid this function stores the value and returns TRUE. Otherwise a value of FALSE is returned. It is expected, that DLLs will use TlsAlloc and TlsSetValue as follows: - Upon DLL initialization, a TLS index will be allocated using TlsAlloc. The DLL will then allocate some dynamic storage and store its address in the TLS slot using TlsSetValue. This completes the per thread initialization for the initial thread of the process. The TLS index is stored in instance data for the DLL. - Each time a new thread attaches to the DLL, the DLL will allocate some dynamic storage and store its address in the TLS slot using TlsSetValue. This completes the per thread initialization for the new thread. - Each time an initialized thread makes a DLL call requiring the TLS, the DLL will call TlsGetValue to get the TLS data for the thread. Arguments: dwTlsIndex - Supplies a TLS index allocated using TlsAlloc. The index specifies which TLS slot is to be located. Translating a TlsIndex does not prevent a TlsFree call from proceding. lpTlsValue - Supplies the value to be stored in the TLS Slot. Return Value: TRUE - The function was successful. The value lpTlsValue was stored. FALSE - The operation failed. Extended error status is available using GetLastError. --*/ { PTEB Teb; Teb = NtCurrentTeb(); if ( dwTlsIndex >= TLS_MINIMUM_AVAILABLE ) { dwTlsIndex -= TLS_MINIMUM_AVAILABLE; if ( dwTlsIndex < TLS_EXPANSION_SLOTS ) { if ( !Teb->TlsExpansionSlots ) { RtlAcquirePebLock(); if ( !Teb->TlsExpansionSlots ) { Teb->TlsExpansionSlots = RtlAllocateHeap( RtlProcessHeap(), MAKE_TAG( TMP_TAG ) | HEAP_ZERO_MEMORY, TLS_EXPANSION_SLOTS * sizeof(PVOID) ); if ( !Teb->TlsExpansionSlots ) { RtlReleasePebLock(); BaseSetLastNTError(STATUS_NO_MEMORY); return FALSE; } } RtlReleasePebLock(); } Teb->TlsExpansionSlots[dwTlsIndex] = lpTlsValue; } else { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return FALSE; } } else { Teb->TlsSlots[dwTlsIndex] = lpTlsValue; } return TRUE; } BOOL APIENTRY TlsFree( DWORD dwTlsIndex ) /*++ Routine Description: A valid TLS index may be free'd using TlsFree. Arguments: dwTlsIndex - Supplies a TLS index allocated using TlsAlloc. If the index is a valid index, it is released by this call and is made available for reuse. DLLs should be carefull to release any per-thread data pointed to by all of their threads TLS slots before calling this function. It is expected that DLLs will only call this function (if at ALL) during their process detach routine. Return Value: TRUE - The operation was successful. Calling TlsTranslateIndex with this index will fail. TlsAlloc is free to reallocate this index. FALSE - The operation failed. Extended error status is available using GetLastError. --*/ { PPEB Peb; BOOLEAN ValidIndex; PRTL_BITMAP TlsBitmap; NTSTATUS Status; DWORD Index2; Peb = NtCurrentPeb(); RtlAcquirePebLock(); try { if ( dwTlsIndex >= TLS_MINIMUM_AVAILABLE ) { Index2 = dwTlsIndex - TLS_MINIMUM_AVAILABLE; if ( Index2 >= TLS_EXPANSION_SLOTS ) { ValidIndex = FALSE; } else { TlsBitmap = (PRTL_BITMAP)Peb->TlsExpansionBitmap; ValidIndex = RtlAreBitsSet(TlsBitmap,Index2,1); } } else { TlsBitmap = (PRTL_BITMAP)Peb->TlsBitmap; Index2 = dwTlsIndex; ValidIndex = RtlAreBitsSet(TlsBitmap,Index2,1); } if ( ValidIndex ) { Status = NtSetInformationThread( NtCurrentThread(), ThreadZeroTlsCell, &dwTlsIndex, sizeof(dwTlsIndex) ); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return FALSE; } RtlClearBits(TlsBitmap,Index2,1); } else { BaseSetLastNTError(STATUS_INVALID_PARAMETER); } } finally { RtlReleasePebLock(); } return ValidIndex; } BOOL WINAPI GetThreadTimes( HANDLE hThread, LPFILETIME lpCreationTime, LPFILETIME lpExitTime, LPFILETIME lpKernelTime, LPFILETIME lpUserTime ) /*++ Routine Description: This function is used to return various timing information about the thread specified by hThread. All times are in units of 100ns increments. For lpCreationTime and lpExitTime, the times are in terms of the SYSTEM time or GMT time. Arguments: hThread - Supplies an open handle to the specified thread. The handle must have been created with THREAD_QUERY_INFORMATION access. lpCreationTime - Returns a creation time of the thread. lpExitTime - Returns the exit time of a thread. If the thread has not exited, this value is not defined. lpKernelTime - Returns the amount of time that this thread has executed in kernel-mode. lpUserTime - Returns the amount of time that this thread has executed in user-mode. Return Value: TRUE - The API was successful FALSE - The operation failed. Extended error status is available using GetLastError. --*/ { NTSTATUS Status; KERNEL_USER_TIMES TimeInfo; Status = NtQueryInformationThread( hThread, ThreadTimes, (PVOID)&TimeInfo, sizeof(TimeInfo), NULL ); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } *lpCreationTime = *(LPFILETIME)&TimeInfo.CreateTime; *lpExitTime = *(LPFILETIME)&TimeInfo.ExitTime; *lpKernelTime = *(LPFILETIME)&TimeInfo.KernelTime; *lpUserTime = *(LPFILETIME)&TimeInfo.UserTime; return TRUE; } BOOL WINAPI GetThreadIOPendingFlag( IN HANDLE hThread, OUT PBOOL lpIOIsPending ) /*++ Routine Description: This function is used to determine whether the thread in question has any IO requests pending. Arguments: hThread - Specifies an open handle to the desired thread. The handle must have been created with THREAD_QUERY_INFORMATION access. lpIOIsPending - Specifes the location to receive the flag. Return Value: TRUE - The call was successful. FALSE - The call failed. Extended error status is available using GetLastError(). --*/ { NTSTATUS Status; ULONG Pending; Status = NtQueryInformationThread(hThread, ThreadIsIoPending, &Pending, sizeof(Pending), NULL); if (! NT_SUCCESS(Status)) { BaseSetLastNTError(Status); return FALSE; } *lpIOIsPending = (Pending ? TRUE : FALSE); return TRUE; } DWORD_PTR WINAPI SetThreadAffinityMask( HANDLE hThread, DWORD_PTR dwThreadAffinityMask ) /*++ Routine Description: This function is used to set the specified thread's processor affinity mask. The thread affinity mask is a bit vector where each bit represents the processors that the thread is allowed to run on. The affinity mask MUST be a proper subset of the containing process' process level affinity mask. Arguments: hThread - Supplies a handle to the thread whose priority is to be set. The handle must have been created with THREAD_SET_INFORMATION access. dwThreadAffinityMask - Supplies the affinity mask to be used for the specified thread. Return Value: non-0 - The API was successful. The return value is the previous affinity mask for the thread. 0 - The operation failed. Extended error status is available using GetLastError. --*/ { THREAD_BASIC_INFORMATION BasicInformation; NTSTATUS Status; DWORD_PTR rv; DWORD_PTR LocalThreadAffinityMask; Status = NtQueryInformationThread( hThread, ThreadBasicInformation, &BasicInformation, sizeof(BasicInformation), NULL ); if ( !NT_SUCCESS(Status) ) { rv = 0; } else { LocalThreadAffinityMask = dwThreadAffinityMask; Status = NtSetInformationThread( hThread, ThreadAffinityMask, &LocalThreadAffinityMask, sizeof(LocalThreadAffinityMask) ); if ( !NT_SUCCESS(Status) ) { rv = 0; } else { rv = BasicInformation.AffinityMask; } } if ( !rv ) { BaseSetLastNTError(Status); } return rv; } VOID BaseDispatchAPC( LPVOID lpApcArgument1, LPVOID lpApcArgument2, LPVOID lpApcArgument3 ) { PAPCFUNC pfnAPC; ULONG_PTR dwData; PACTIVATION_CONTEXT ActivationContext; NTSTATUS Status; RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME ActivationFrame = { sizeof(ActivationFrame), RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME_FORMAT_WHISTLER }; pfnAPC = (PAPCFUNC) lpApcArgument1; dwData = (ULONG_PTR) lpApcArgument2; ActivationContext = (PACTIVATION_CONTEXT) lpApcArgument3; if (ActivationContext == INVALID_ACTIVATION_CONTEXT) { (*pfnAPC)(dwData); } else { RtlActivateActivationContextUnsafeFast(&ActivationFrame, ActivationContext); __try { (*pfnAPC)(dwData); } __finally { RtlDeactivateActivationContextUnsafeFast(&ActivationFrame); RtlReleaseActivationContext(ActivationContext); } } } WINBASEAPI DWORD WINAPI QueueUserAPC( PAPCFUNC pfnAPC, HANDLE hThread, ULONG_PTR dwData ) /*++ Routine Description: This function is used to queue a user-mode APC to the specified thread. The APC will fire when the specified thread does an alertable wait. Arguments: pfnAPC - Supplies the address of the APC routine to execute when the APC fires. hHandle - Supplies a handle to a thread object. The caller must have THREAD_SET_CONTEXT access to the thread. dwData - Supplies a DWORD passed to the APC Return Value: TRUE - The operations was successful FALSE - The operation failed. GetLastError() is not defined. --*/ { NTSTATUS Status; PVOID Argument1 = (PVOID) pfnAPC; PVOID Argument2 = (PVOID) dwData; PVOID Argument3 = NULL; ACTIVATION_CONTEXT_BASIC_INFORMATION acbi = { 0 }; Status = RtlQueryInformationActivationContext( RTL_QUERY_INFORMATION_ACTIVATION_CONTEXT_FLAG_USE_ACTIVE_ACTIVATION_CONTEXT, NULL, 0, ActivationContextBasicInformation, &acbi, sizeof(acbi), NULL); if (!NT_SUCCESS(Status)) { DbgPrint("SXS: %s failing because RtlQueryInformationActivationContext() returned status %08lx\n", __FUNCTION__, Status); return FALSE; } Argument3 = acbi.ActivationContext; if (acbi.Flags & ACTIVATION_CONTEXT_FLAG_NO_INHERIT) { // We're not supposed to propogate the activation context; set it to a value to indicate such. Argument3 = INVALID_ACTIVATION_CONTEXT; } Status = NtQueueApcThread( hThread, &BaseDispatchAPC, Argument1, Argument2, Argument3 ); if ( !NT_SUCCESS(Status) ) { return 0; } return 1; } DWORD WINAPI SetThreadIdealProcessor( HANDLE hThread, DWORD dwIdealProcessor ) { NTSTATUS Status; ULONG rv; Status = NtSetInformationThread( hThread, ThreadIdealProcessor, &dwIdealProcessor, sizeof(dwIdealProcessor) ); if ( !NT_SUCCESS(Status) ) { rv = (DWORD)0xFFFFFFFF; BaseSetLastNTError(Status); } else { rv = (ULONG)Status; } return rv; } WINBASEAPI LPVOID WINAPI CreateFiber( SIZE_T dwStackSize, LPFIBER_START_ROUTINE lpStartAddress, LPVOID lpParameter ) /*++ Routine Description: This function creates a fiber that executing at lpStartAddress as soon as a thread is switched to it. Arguments: dwStackSize - Commit size of the stack lpStartAddress - Routine that the fiber will start running lpParameter - Arbitrary context that is passed to the fiber Return Value: LPVOID - Handle to the Fiber --*/ { return CreateFiberEx (dwStackSize, // dwStackCommitSize 0, // dwStackReserveSize 0, // dwFlags lpStartAddress, lpParameter); } WINBASEAPI LPVOID WINAPI CreateFiberEx( SIZE_T dwStackCommitSize, SIZE_T dwStackReserveSize, DWORD dwFlags, LPFIBER_START_ROUTINE lpStartAddress, LPVOID lpParameter ) /*++ Routine Description: This function creates a fiber that executing at lpStartAddress as soon as a thread is switched to it. Arguments: dwStackCommitSize - Commit size of the stack dwStackReserveSize - Reserve size of the stack dwFlags - Reserved for future use lpStartAddress - Routine that the fiber will start running lpParameter - Arbitrary context that is passed to the fiber Return Value: LPVOID - Handle to the Fiber --*/ { NTSTATUS Status; PFIBER Fiber; INITIAL_TEB InitialTeb; // // Reserve these flags for later use // if (dwFlags != 0) { SetLastError (ERROR_INVALID_PARAMETER); return NULL; } Fiber = RtlAllocateHeap (RtlProcessHeap (), MAKE_TAG (TMP_TAG), sizeof (*Fiber)); if (Fiber == NULL) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); return Fiber; } Status = BaseCreateStack (NtCurrentProcess(), dwStackCommitSize, dwStackReserveSize, &InitialTeb); if (!NT_SUCCESS (Status)) { BaseSetLastNTError (Status); RtlFreeHeap (RtlProcessHeap(), 0, Fiber); return NULL; } Fiber->FiberData = lpParameter; Fiber->StackBase = InitialTeb.StackBase; Fiber->StackLimit = InitialTeb.StackLimit; Fiber->DeallocationStack = InitialTeb.StackAllocationBase; Fiber->ExceptionList = (struct _EXCEPTION_REGISTRATION_RECORD *)-1; Fiber->Wx86Tib = NULL; #ifdef _IA64_ Fiber->BStoreLimit = InitialTeb.BStoreLimit; Fiber->DeallocationBStore = (PVOID) ((ULONG_PTR)InitialTeb.StackBase + ((ULONG_PTR)InitialTeb.StackBase - (ULONG_PTR)InitialTeb.StackAllocationBase)); #endif // _IA64_ // // Create an initial context for the new fiber. // BaseInitializeContext (&Fiber->FiberContext, lpParameter, (PVOID)lpStartAddress, InitialTeb.StackBase, BaseContextTypeFiber); return Fiber; } WINBASEAPI VOID WINAPI DeleteFiber( LPVOID lpFiber ) { SIZE_T dwStackSize; PFIBER Fiber = lpFiber; PTEB Teb; // // If the current fiber makes this call, then it's just a thread exit // Teb = NtCurrentTeb(); if (Teb->NtTib.FiberData == Fiber) { // // Free the fiber data if there is some. // if (Teb->HasFiberData) { Fiber = Teb->NtTib.FiberData; if (Fiber != NULL) { RtlFreeHeap(RtlProcessHeap(),0,Fiber); } } ExitThread(1); } dwStackSize = 0; NtFreeVirtualMemory (NtCurrentProcess(), &Fiber->DeallocationStack, &dwStackSize, MEM_RELEASE); #if defined (WX86) if (Fiber->Wx86Tib && Fiber->Wx86Tib->Size == sizeof(WX86TIB)) { PVOID BaseAddress = Fiber->Wx86Tib->DeallocationStack; dwStackSize = 0; NtFreeVirtualMemory (NtCurrentProcess(), &BaseAddress, &dwStackSize, MEM_RELEASE); } #endif RtlFreeHeap(RtlProcessHeap(),0,Fiber); } WINBASEAPI LPVOID WINAPI ConvertThreadToFiber( LPVOID lpParameter ) { PFIBER Fiber; PTEB Teb; Fiber = RtlAllocateHeap( RtlProcessHeap(), MAKE_TAG( TMP_TAG ), sizeof(*Fiber) ); if (Fiber == NULL) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); return Fiber; } Teb = NtCurrentTeb(); Fiber->FiberData = lpParameter; Fiber->StackBase = Teb->NtTib.StackBase; Fiber->StackLimit = Teb->NtTib.StackLimit; Fiber->DeallocationStack = Teb->DeallocationStack; Fiber->ExceptionList = Teb->NtTib.ExceptionList; #ifdef _IA64_ Fiber->BStoreLimit = Teb->BStoreLimit; Fiber->DeallocationBStore = Teb->DeallocationBStore; #endif // _IA64_ Fiber->Wx86Tib = NULL; Teb->NtTib.FiberData = Fiber; Teb->HasFiberData = TRUE; return Fiber; } WINBASEAPI BOOL WINAPI ConvertFiberToThread( VOID ) { PFIBER Fiber; PTEB Teb; Teb = NtCurrentTeb(); if (!Teb->HasFiberData) { SetLastError (ERROR_INVALID_PARAMETER); return FALSE; } Teb->HasFiberData = FALSE; Fiber = Teb->NtTib.FiberData; Teb->NtTib.FiberData = NULL; if (Fiber != NULL) { RtlFreeHeap (RtlProcessHeap (), 0, Fiber); } return TRUE; } BOOL WINAPI SwitchToThread( VOID ) /*++ Routine Description: This function causes a yield from the running thread to any other thread that is ready and can run on the current processor. The yield will be effective for up to one quantum and then the yielding thread will be scheduled again according to its priority and whatever other threads may also be avaliable to run. The thread that yields will not bounce to another processor even it another processor is idle or running a lower priority thread. Arguments: None Return Value: TRUE - Calling this function caused a switch to another thread to occur FALSE - There were no other ready threads, so no context switch occured --*/ { if (NtYieldExecution() == STATUS_NO_YIELD_PERFORMED) { return FALSE; } else { return TRUE; } } BOOL WINAPI RegisterWaitForSingleObject( PHANDLE phNewWaitObject, HANDLE hObject, WAITORTIMERCALLBACK Callback, PVOID Context, ULONG dwMilliseconds, ULONG dwFlags ) /*++ Routine Description: This function registers a wait for a particular object, with an optional timeout. This differs from WaitForSingleObject because the wait is performed by a different thread that combines several such calls for efficiency. The function supplied in Callback is called when the object is signalled, or the timeout expires. Arguments: phNewWaitObject - pointer to new WaitObject returned by this function. hObject - HANDLE to a Win32 kernel object (Event, Mutex, File, Process, Thread, etc.) that will be waited on. Note: if the object handle does not immediately return to the not-signalled state, e.g. an auto-reset event, then either WT_EXECUTEINWAITTHREAD or WT_EXECUTEONLYONCE should be specified. Otherwise, the thread pool will continue to fire the callbacks. If WT_EXECUTEINWAITTHREAD is specified, the the object should be deregistered or reset in the callback. Callback - Function that will be called when the object is signalled or the timer expires. Context - Context that will be passed to the callback function. dwMilliseconds - timeout for the wait. Each time the timer is fired or the event is fired, the timer is reset (except if WT_EXECUTEONLYONCE is set). dwFlags - Flags indicating options for this wait: WT_EXECUTEDEFAULT - Default (0) WT_EXECUTEINIOTHREAD - Select an I/O thread for execution WT_EXECUTEINUITHREAD - Select a UI thread for execution WT_EXECUTEINWAITTHREAD - Execute in the thread that handles waits WT_EXECUTEONLYONCE - The callback function will be called only once WT_EXECUTELONGFUNCTION - The Callback function can potentially block for a long time. Is valid only if WT_EXECUTEINWAITTHREAD flag is not set. Return Value: FALSE - an error occurred, use GetLastError() for more information. TRUE - success. --*/ { NTSTATUS Status ; PPEB Peb; *phNewWaitObject = NULL; Peb = NtCurrentPeb(); switch( HandleToUlong(hObject) ) { case STD_INPUT_HANDLE: hObject = Peb->ProcessParameters->StandardInput; break; case STD_OUTPUT_HANDLE: hObject = Peb->ProcessParameters->StandardOutput; break; case STD_ERROR_HANDLE: hObject = Peb->ProcessParameters->StandardError; break; } if (CONSOLE_HANDLE(hObject) && VerifyConsoleIoHandle(hObject)) { hObject = GetConsoleInputWaitHandle(); } Status = RtlRegisterWait( phNewWaitObject, hObject, Callback, Context, dwMilliseconds, dwFlags ); if ( NT_SUCCESS( Status ) ) { return TRUE ; } BaseSetLastNTError( Status ); return FALSE ; } HANDLE WINAPI RegisterWaitForSingleObjectEx( HANDLE hObject, WAITORTIMERCALLBACK Callback, PVOID Context, ULONG dwMilliseconds, ULONG dwFlags ) /*++ Routine Description: This function registers a wait for a particular object, with an optional timeout. This differs from WaitForSingleObject because the wait is performed by a different thread that combines several such calls for efficiency. The function supplied in Callback is called when the object is signalled, or the timeout expires. Arguments: hObject - HANDLE to a Win32 kernel object (Event, Mutex, File, Process, Thread, etc.) that will be waited on. Note: if the object handle does not immediately return to the not-signalled state, e.g. an auto-reset event, then either WT_EXECUTEINWAITTHREAD or WT_EXECUTEONLYONCE should be specified. Otherwise, the thread pool will continue to fire the callbacks. If WT_EXECUTEINWAITTHREAD is specified, the the object should be deregistered or reset in the callback. Callback - Function that will be called when the object is signalled or the timer expires. Context - Context that will be passed to the callback function. dwMilliseconds - timeout for the wait. Each time the timer is fired or the event is fired, the timer is reset (except if WT_EXECUTEONLYONCE is set). dwFlags - Flags indicating options for this wait: WT_EXECUTEDEFAULT - Default (0) WT_EXECUTEINIOTHREAD - Select an I/O thread for execution WT_EXECUTEINUITHREAD - Select a UI thread for execution WT_EXECUTEINWAITTHREAD - Execute in the thread that handles waits WT_EXECUTEONLYONCE - The callback function will be called only once WT_EXECUTELONGFUNCTION - The Callback function can potentially block for a long time. Is valid only if WT_EXECUTEINWAITTHREAD flag is not set. Return Value: NULL - an error occurred, use GetLastError() for more information. non-NULL - a virtual handle that can be passed later to UnregisterWait --*/ { HANDLE WaitHandle ; NTSTATUS Status ; PPEB Peb; Peb = NtCurrentPeb(); switch( HandleToUlong(hObject) ) { case STD_INPUT_HANDLE: hObject = Peb->ProcessParameters->StandardInput; break; case STD_OUTPUT_HANDLE: hObject = Peb->ProcessParameters->StandardOutput; break; case STD_ERROR_HANDLE: hObject = Peb->ProcessParameters->StandardError; break; } if (CONSOLE_HANDLE(hObject) && VerifyConsoleIoHandle(hObject)) { hObject = GetConsoleInputWaitHandle(); } Status = RtlRegisterWait( &WaitHandle, hObject, Callback, Context, dwMilliseconds, dwFlags ); if ( NT_SUCCESS( Status ) ) { return WaitHandle ; } BaseSetLastNTError( Status ); return NULL ; } BOOL WINAPI UnregisterWait( HANDLE WaitHandle ) /*++ Routine Description: This function cancels a wait for a particular object. All objects that were registered by the RtlWaitForSingleObject(Ex) call should be deregistered. This is a non-blocking call, and the associated callback function can still be executing after the return of this function. Arguments: WaitHandle - Handle returned from RegisterWaitForSingleObject(Ex) Return Value: TRUE - The wait was cancelled FALSE - an error occurred or a callback function was still executing, use GetLastError() for more information. --*/ { NTSTATUS Status ; if ( WaitHandle ) { Status = RtlDeregisterWait( WaitHandle ); // set error if it is a non-blocking call and STATUS_PENDING was returned if ( Status == STATUS_PENDING || !NT_SUCCESS( Status ) ) { BaseSetLastNTError( Status ); return FALSE; } return TRUE ; } SetLastError( ERROR_INVALID_HANDLE ); return FALSE ; } BOOL WINAPI UnregisterWaitEx( HANDLE WaitHandle, HANDLE CompletionEvent ) /*++ Routine Description: This function cancels a wait for a particular object. All objects that were registered by the RtlWaitForSingleObject(Ex) call should be deregistered. Arguments: WaitHandle - Handle returned from RegisterWaitForSingleObject CompletionEvent - Handle to wait on for completion. NULL - NonBlocking call. INVALID_HANDLE_VALUE - Blocking call. Block till all Callback functions associated with the WaitHandle have completed Event - NonBlocking call. The Object is deregistered. The Event is signalled when the last callback function has completed execution. Return Value: TRUE - The wait was cancelled FALSE - an error occurred or a callback was still executing, use GetLastError() for more information. --*/ { NTSTATUS Status ; if ( WaitHandle ) { Status = RtlDeregisterWaitEx( WaitHandle, CompletionEvent ); // set error if it is a non-blocking call and STATUS_PENDING was returned if ( (CompletionEvent != INVALID_HANDLE_VALUE && Status == STATUS_PENDING) || ( ! NT_SUCCESS( Status ) ) ) { BaseSetLastNTError( Status ); return FALSE; } return TRUE ; } SetLastError( ERROR_INVALID_HANDLE ); return FALSE ; } BOOL WINAPI QueueUserWorkItem( LPTHREAD_START_ROUTINE Function, PVOID Context, ULONG Flags ) /*++ Routine Description: This function queues a work item to a thread out of the thread pool. The function passed is invoked in a different thread, and passed the Context pointer. The caller can specify whether the thread pool should select a thread that can have I/O pending, or any thread. Arguments: Function - Function to call Context - Pointer passed to the function when it is invoked. Flags - - WT_EXECUTEINIOTHREAD Indictes to the thread pool that this thread will perform I/O. A thread that starts an asynchronous I/O operation must wait for it to complete. If a thread exits with outstanding I/O requests, those requests will be cancelled. This flag is a hint to the thread pool that this function will start I/O, so that a thread which can have pending I/O will be used. - WT_EXECUTELONGFUNCTION Indicates to the thread pool that the function might block for a long time. Return Value: TRUE - The work item was queued to another thread. FALSE - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; Status = RtlQueueWorkItem( (WORKERCALLBACKFUNC) Function, Context, Flags ); if ( NT_SUCCESS( Status ) ) { return TRUE ; } BaseSetLastNTError( Status ); return FALSE ; } BOOL WINAPI BindIoCompletionCallback ( HANDLE FileHandle, LPOVERLAPPED_COMPLETION_ROUTINE Function, ULONG Flags ) /*++ Routine Description: This function binds the FileHandle opened for overlapped operations to the IO completion port associated with worker threads. Arguments: FileHandle - File Handle on which IO operations will be initiated. Function - Function executed in a non-IO worker thread when the IO operation completes. Flags - Currently set to 0. Not used. Return Value: TRUE - The file handle was associated with the IO completion port. FALSE - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; Status = RtlSetIoCompletionCallback( FileHandle, (APC_CALLBACK_FUNCTION) Function, Flags ); if ( NT_SUCCESS( Status ) ) { return TRUE ; } BaseSetLastNTError( Status ); return FALSE ; } //+--------------------------------------------------------------------------- //+--------------------------------------------------------------------------- // // Function: BasepCreateDefaultTimerQueue // // Synopsis: Creates the default timer queue for the process // // Arguments: (none) // // History: 5-26-98 RichardW Created // // Notes: // //---------------------------------------------------------------------------- BOOL BasepCreateDefaultTimerQueue( VOID ) { NTSTATUS Status ; while ( 1 ) { if ( !InterlockedExchange( &BasepTimerQueueInitFlag, 1 ) ) { // // Force the done flag to 0. If it was 1, so one already tried to // init and failed. // InterlockedExchange( &BasepTimerQueueDoneFlag, 0 ); Status = RtlCreateTimerQueue( &BasepDefaultTimerQueue ); if ( NT_SUCCESS( Status ) ) { InterlockedIncrement( &BasepTimerQueueDoneFlag ); return TRUE ; } // // This is awkward. We aren't able to create a timer queue, // probably because of low memory. We will fail this call, but decrement // the init flag, so that others can try again later. Need to increment // the done flag, or any other threads would be stuck. // BaseSetLastNTError( Status ); InterlockedIncrement( &BasepTimerQueueDoneFlag ); InterlockedDecrement( &BasepTimerQueueInitFlag ); return FALSE ; } else { LARGE_INTEGER TimeOut ; TimeOut.QuadPart = -1 * 10 * 10000 ; // // yield the quantum so that the other thread can // try to create the timer queue. // while ( !BasepTimerQueueDoneFlag ) { NtDelayExecution( FALSE, &TimeOut ); } // // Make sure it was created. Otherwise, try it again (memory might have // freed up). This way, every thread gets an individual chance to create // the queue if another thread failed. // if ( BasepDefaultTimerQueue ) { return TRUE ; } } } } HANDLE WINAPI CreateTimerQueue( VOID ) /*++ Routine Description: This function creates a queue for timers. Timers on a timer queue are lightweight objects that allow the caller to specify a function to be called at some point in the future. Any number of timers can be created in a particular timer queue. Arguments: None. Return Value: non-NULL - a timer queue handle that can be passed to SetTimerQueueTimer, ChangeTimerQueueTimer, CancelTimerQueueTimer, and DeleteTimerQueue. NULL - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; HANDLE Handle ; Status = RtlCreateTimerQueue( &Handle ); if ( NT_SUCCESS( Status ) ) { return Handle ; } BaseSetLastNTError( Status ); return NULL ; } BOOL WINAPI CreateTimerQueueTimer( PHANDLE phNewTimer, HANDLE TimerQueue, WAITORTIMERCALLBACK Callback, PVOID Parameter, DWORD DueTime, DWORD Period, ULONG Flags ) /*++ Routine Description: This function creates a timer queue timer, a lightweight timer that will fire at the DueTime, and then every Period milliseconds afterwards. When the timer fires, the function passed in Callback will be invoked, and passed the Parameter pointer. Arguments: phNewTimer - pointer to new timer handle TimerQueue - Timer Queue to attach this timer to. NULL indicates that the default process timer queue be used. Function - Function to call Context - Pointer passed to the function when it is invoked. DueTime - Time from now that the timer should fire, expressed in milliseconds. If set to INFINITE, then it will never fire. If set to 0, then it will fire immediately. Period - Time in between firings of this timer. If 0, then it is a one shot timer. Flags - by default the Callback function is queued to a non-IO worker thread. - WT_EXECUTEINIOTHREAD Indictes to the thread pool that this thread will perform I/O. A thread that starts an asynchronous I/O operation must wait for it to complete. If a thread exits with outstanding I/O requests, those requests will be cancelled. This flag is a hint to the thread pool that this function will start I/O, so that a thread with I/O already pending will be used. - WT_EXECUTEINTIMERTHREAD The callback function will be executed in the timer thread. - WT_EXECUTELONGFUNCTION Indicates that the function might block for a long time. Useful only if it is queued to a worker thread. Return Value: TRUE - no error FALSE - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; *phNewTimer = NULL ; // // if the passed timer queue is NULL, use the default one. If it is null, // call the initializer that will do it in a nice thread safe fashion. // if ( !TimerQueue ) { if ( !BasepDefaultTimerQueue ) { if ( !BasepCreateDefaultTimerQueue( ) ) { return FALSE ; } } TimerQueue = BasepDefaultTimerQueue ; } Status = RtlCreateTimer( TimerQueue, phNewTimer, Callback, Parameter, DueTime, Period, Flags ); if ( NT_SUCCESS( Status ) ) { return TRUE ; } BaseSetLastNTError( Status ); return FALSE ; } BOOL WINAPI ChangeTimerQueueTimer( HANDLE TimerQueue, HANDLE Timer, ULONG DueTime, ULONG Period ) /*++ Routine Description: This function updates a timer queue timer created with SetTimerQueueTimer. Arguments: TimerQueue - Timer Queue to attach this timer to. NULL indicates the default process timer queue. Timer - Handle returned from SetTimerQueueTimer. DueTime - Time from now that the timer should fire, expressed in milliseconds. Period - Time in between firings of this timer. If set to 0, then it becomes a one shot timer. Return Value: TRUE - the timer was changed FALSE - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; // // Use the default timer queue if none was passed in. If there isn't one, then // the process hasn't created one with SetTimerQueueTimer, and that's an error. // if ( !TimerQueue ) { TimerQueue = BasepDefaultTimerQueue ; if ( !TimerQueue ) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE ; } } Status = RtlUpdateTimer( TimerQueue, Timer, DueTime, Period ); if ( NT_SUCCESS( Status ) ) { return TRUE ; } BaseSetLastNTError( Status ); return FALSE ; } BOOL WINAPI DeleteTimerQueueTimer( HANDLE TimerQueue, HANDLE Timer, HANDLE CompletionEvent ) /*++ Routine Description: This function cancels a timer queue timer created with SetTimerQueueTimer. Arguments: TimerQueue - Timer Queue that this timer was created on. Timer - Handle returned from SetTimerQueueTimer. CompletionEvent - - NULL : NonBlocking call. returns immediately. - INVALID_HANDLE_VALUE : Blocking call. Returns after all callbacks have executed - Event (handle to an event) : NonBlocking call. Returns immediately. Event signalled after all callbacks have executed. Return Value: TRUE - the timer was cancelled. FALSE - an error occurred or the call is pending, use GetLastError() for more information. --*/ { NTSTATUS Status ; // // Use the default timer queue if none was passed in. If there isn't one, then // the process hasn't created one with SetTimerQueueTimer, and that's an error. // if ( !TimerQueue ) { TimerQueue = BasepDefaultTimerQueue ; if ( !TimerQueue ) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE ; } } Status = RtlDeleteTimer( TimerQueue, Timer, CompletionEvent ); // set error if it is a non-blocking call and STATUS_PENDING was returned if ( (CompletionEvent != INVALID_HANDLE_VALUE && Status == STATUS_PENDING) || ( ! NT_SUCCESS( Status ) ) ) { BaseSetLastNTError( Status ); return FALSE; } return TRUE ; } BOOL WINAPI DeleteTimerQueueEx( HANDLE TimerQueue, HANDLE CompletionEvent ) /*++ Routine Description: This function deletes a timer queue created with CreateTimerQueue. Any pending timers on the timer queue are cancelled and deleted. Arguments: TimerQueue - Timer Queue to delete. CompletionEvent - - NULL : NonBlocking call. returns immediately. - INVALID_HANDLE_VALUE : Blocking call. Returns after all callbacks have executed - Event (handle to an event) : NonBlocking call. Returns immediately. Event signalled after all callbacks have executed. Return Value: TRUE - the timer queue was deleted. FALSE - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; if ( TimerQueue ) { Status = RtlDeleteTimerQueueEx( TimerQueue, CompletionEvent ); // set error if it is a non-blocking call and STATUS_PENDING was returned if ( (CompletionEvent != INVALID_HANDLE_VALUE && Status == STATUS_PENDING) || ( ! NT_SUCCESS( Status ) ) ) { BaseSetLastNTError( Status ); return FALSE; } return TRUE ; } SetLastError( ERROR_INVALID_HANDLE ); return FALSE ; } BOOL WINAPI ThreadPoolCleanup ( ULONG Flags ) /*++ Routine Description: Called by terminating process for thread pool to cleanup and delete all its threads. Arguments: Flags - currently not used Return Value: NO_ERROR --*/ { // RtlThreadPoolCleanup( Flags ) ; return TRUE ; } /*OBSOLETE FUNCTION - REPLACED BY CreateTimerQueueTimer */ HANDLE WINAPI SetTimerQueueTimer( HANDLE TimerQueue, WAITORTIMERCALLBACK Callback, PVOID Parameter, DWORD DueTime, DWORD Period, BOOL PreferIo ) /*OBSOLETE FUNCTION - REPLACED BY CreateTimerQueueTimer */ { NTSTATUS Status ; HANDLE Handle ; // // if the passed timer queue is NULL, use the default one. If it is null, // call the initializer that will do it in a nice thread safe fashion. // if ( !TimerQueue ) { if ( !BasepDefaultTimerQueue ) { if ( !BasepCreateDefaultTimerQueue( ) ) { return NULL ; } } TimerQueue = BasepDefaultTimerQueue ; } Status = RtlCreateTimer( TimerQueue, &Handle, Callback, Parameter, DueTime, Period, (PreferIo ? WT_EXECUTEINIOTHREAD : 0 ) ); if ( NT_SUCCESS( Status ) ) { return Handle ; } BaseSetLastNTError( Status ); return NULL ; } /*OBSOLETE: Replaced by DeleteTimerQueueEx */ BOOL WINAPI DeleteTimerQueue( HANDLE TimerQueue ) /*++ OBSOLETE: Replaced by DeleteTimerQueueEx Routine Description: This function deletes a timer queue created with CreateTimerQueue. Any pending timers on the timer queue are cancelled and deleted. This is a non-blocking call. Callbacks might still be running after this call returns. Arguments: TimerQueue - Timer Queue to delete. Return Value: TRUE - the timer queue was deleted. FALSE - an error occurred, use GetLastError() for more information. --*/ { NTSTATUS Status ; if (TimerQueue) { Status = RtlDeleteTimerQueueEx( TimerQueue, NULL ); // set error if it is a non-blocking call and STATUS_PENDING was returned /* if ( Status == STATUS_PENDING || ! NT_SUCCESS( Status ) ) { BaseSetLastNTError( Status ); return FALSE; } */ return TRUE ; } SetLastError( ERROR_INVALID_HANDLE ); return FALSE ; } /*OBSOLETE: USE DeleteTimerQueueTimer*/ BOOL WINAPI CancelTimerQueueTimer( HANDLE TimerQueue, HANDLE Timer ) /*OBSOLETE: USE DeleteTimerQueueTimer*/ { NTSTATUS Status ; // // Use the default timer queue if none was passed in. If there isn't one, then // the process hasn't created one with SetTimerQueueTimer, and that's an error. // if ( !TimerQueue ) { TimerQueue = BasepDefaultTimerQueue ; if ( !TimerQueue ) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE ; } } Status = RtlDeleteTimer( TimerQueue, Timer, NULL ); if ( NT_SUCCESS( Status ) ) { return TRUE ; } BaseSetLastNTError( Status ); return FALSE ; }