752 lines
23 KiB
C
752 lines
23 KiB
C
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/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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critsect.c
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Abstract:
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This module implements verification functions for
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critical section interfaces.
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Author:
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Daniel Mihai (DMihai) 27-Mar-2001
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Revision History:
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--*/
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#include "pch.h"
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#include "verifier.h"
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VOID
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RtlpWaitForCriticalSection (
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IN PRTL_CRITICAL_SECTION CriticalSection
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);
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//NTSYSAPI
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BOOL
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NTAPI
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AVrfpRtlTryEnterCriticalSection(
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PRTL_CRITICAL_SECTION CriticalSection
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)
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{
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BOOL Result;
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HANDLE CurrentThread;
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LONG LockCount;
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if ((AVrfpProvider.VerifierFlags & RTL_VRF_FLG_LOCK_CHECKS) != 0 &&
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RtlDllShutdownInProgress() == FALSE ) {
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//
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// Sanity test for DebugInfo.
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//
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if (CriticalSection->DebugInfo == NULL) {
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//
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// This critical section is not initialized.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_NOT_INITIALIZED,
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"critical section not initialized",
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CriticalSection, "Critical section address",
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CriticalSection->DebugInfo, "Critical section debug info address",
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NULL, "",
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NULL, "");
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}
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CurrentThread = NtCurrentTeb()->ClientId.UniqueThread;
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LockCount = InterlockedCompareExchange( &CriticalSection->LockCount,
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0,
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-1 );
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if (LockCount == -1) {
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//
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// The critical section was unowned and we just acquired it
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//
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//
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// Sanity test for the OwningThread.
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//
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if (CriticalSection->OwningThread != 0) {
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//
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// The loader lock gets handled differently, so don't assert on it.
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//
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if (CriticalSection != NtCurrentPeb()->LoaderLock ||
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CriticalSection->OwningThread != CurrentThread) {
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//
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// OwningThread should have been 0.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_OWNER,
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"invalid critical section owner thread",
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CriticalSection, "Critical section address",
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CriticalSection->OwningThread, "Owning thread",
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0, "Expected owning thread",
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CriticalSection->DebugInfo, "Critical section debug info address");
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}
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}
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//
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// Sanity test for the RecursionCount.
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//
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if (CriticalSection->RecursionCount != 0) {
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//
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// The loader lock gets handled differently, so don't assert on it.
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//
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if (CriticalSection != NtCurrentPeb()->LoaderLock) {
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//
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// RecursionCount should have been 0.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_RECURSION_COUNT,
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"invalid critical section recursion count",
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CriticalSection, "Critical section address",
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CriticalSection->RecursionCount, "Recursion count",
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0, "Expected recursion count",
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CriticalSection->DebugInfo, "Critical section debug info address");
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}
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}
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//
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// Set the critical section owner
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//
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CriticalSection->OwningThread = CurrentThread;
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//
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// Set the recursion count
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//
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// ntdll\ia64\critsect.s is using RecursionCount = 0 first time
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// the current thread is acquiring the critical section.
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//
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// ntdll\ia64\critsect.asm is using RecursionCount = 1 first time
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// the current thread is acquiring the critical section.
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//
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#if defined(_IA64_)
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CriticalSection->RecursionCount = 0;
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#else //#if defined(_IA64_)
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CriticalSection->RecursionCount = 1;
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#endif
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#if DBG
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//
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// In a chk build we are updating this additional counter,
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// just like the original function in ntdll does.
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//
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NtCurrentTeb()->CountOfOwnedCriticalSections += 1;
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#endif
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//
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// All done, CriticalSection is owned by the current thread.
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//
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Result = TRUE;
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}
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else {
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//
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// The critical section is currently owned by the current or another thread.
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//
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if (CriticalSection->OwningThread == CurrentThread) {
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//
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// The current thread is already the owner.
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//
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//
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// Inrelock increment the LockCount, and increment the RecursionCount.
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//
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InterlockedIncrement (&CriticalSection->LockCount);
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CriticalSection->RecursionCount += 1;
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//
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// All done, CriticalSection was already owned by
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// the current thread and we have just incremented the RecursionCount.
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//
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Result = TRUE;
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}
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else {
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//
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// Another thread is the owner of this critical section.
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//
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Result = FALSE;
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}
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}
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}
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else {
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//
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// The critical section verifier is not enabled
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//
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Result = RtlTryEnterCriticalSection (CriticalSection);
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}
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return Result;
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}
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//NTSYSAPI
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NTSTATUS
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NTAPI
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AVrfpRtlEnterCriticalSection(
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volatile RTL_CRITICAL_SECTION *CriticalSection
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)
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{
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NTSTATUS Status;
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HANDLE CurrentThread;
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LONG LockCount;
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ULONG_PTR SpinCount;
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if ((AVrfpProvider.VerifierFlags & RTL_VRF_FLG_LOCK_CHECKS) != 0 &&
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RtlDllShutdownInProgress() == FALSE ) {
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//
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// Sanity test for DebugInfo.
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//
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if (CriticalSection->DebugInfo == NULL) {
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//
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// This critical section is not initialized.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_NOT_INITIALIZED,
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"critical section not initialized",
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CriticalSection, "Critical section address",
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CriticalSection->DebugInfo, "Critical section debug info address",
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NULL, "",
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NULL, "");
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}
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Status = STATUS_SUCCESS;
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CurrentThread = NtCurrentTeb()->ClientId.UniqueThread;
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SpinCount = CriticalSection->SpinCount;
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if (SpinCount == 0) {
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//
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// Zero spincount for this critical section.
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//
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EnterZeroSpinCount:
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LockCount = InterlockedIncrement (&CriticalSection->LockCount);
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if (LockCount == 0) {
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EnterSetOwnerAndRecursion:
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//
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// The current thread is the new owner of the critical section.
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//
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//
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// Sanity test for the OwningThread.
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//
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if (CriticalSection->OwningThread != 0) {
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//
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// The loader lock gets handled differently, so don't assert on it.
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//
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if (CriticalSection != NtCurrentPeb()->LoaderLock ||
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CriticalSection->OwningThread != CurrentThread) {
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//
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// OwningThread should have been 0.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_OWNER,
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"invalid critical section owner thread",
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CriticalSection, "Critical section address",
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CriticalSection->OwningThread, "Owning thread",
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0, "Expected owning thread",
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CriticalSection->DebugInfo, "Critical section debug info address");
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}
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}
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//
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// Sanity test for the RecursionCount.
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//
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if (CriticalSection->RecursionCount != 0) {
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//
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// The loader lock gets handled differently, so don't assert on it.
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//
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if (CriticalSection != NtCurrentPeb()->LoaderLock) {
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//
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// RecursionCount should have been 0.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_RECURSION_COUNT,
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"invalid critical section recursion count",
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CriticalSection, "Critical section address",
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CriticalSection->RecursionCount, "Recursion count",
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0, "Expected recursion count",
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CriticalSection->DebugInfo, "Critical section debug info address");
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}
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}
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//
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// Set the critical section owner
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//
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CriticalSection->OwningThread = CurrentThread;
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//
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// Set the recursion count
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//
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// ntdll\ia64\critsect.s is using RecursionCount = 0 first time
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// the current thread is acquiring the critical section.
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//
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// ntdll\ia64\critsect.asm is using RecursionCount = 1 first time
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// the current thread is acquiring the critical section.
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//
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#if defined(_IA64_)
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CriticalSection->RecursionCount = 0;
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#else //#if defined(_IA64_)
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CriticalSection->RecursionCount = 1;
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#endif
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#if DBG
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//
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// In a chk build we are updating these additional counters,
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// just like the original function in ntdll does.
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//
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NtCurrentTeb()->CountOfOwnedCriticalSections += 1;
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CriticalSection->DebugInfo->EntryCount += 1;
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#endif
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//
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// All done, CriticalSection is owned by the current thread.
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//
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}
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else if (LockCount >= 0) {
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//
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// The critical section is currently owned by the current or another thread.
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//
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if (CriticalSection->OwningThread == CurrentThread) {
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//
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// The current thread is already the owner.
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//
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CriticalSection->RecursionCount += 1;
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#if DBG
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//
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// In a chk build we are updating this additional counter,
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// just like the original function in ntdll does.
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//
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CriticalSection->DebugInfo->EntryCount += 1;
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#endif
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//
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// All done, CriticalSection was already owned by
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// the current thread and we have just incremented the RecursionCount.
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//
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}
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else {
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//
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// The current thread is not the owner. Wait for ownership
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//
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RtlpWaitForCriticalSection ((PRTL_CRITICAL_SECTION)CriticalSection);
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//
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// We have just aquired the critical section.
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//
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goto EnterSetOwnerAndRecursion;
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}
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}
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else {
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//
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// The original LockCount was < -1 so the critical section was
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// over-released or corrupted.
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//
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VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_OVER_RELEASED,
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"critical section over-released or corrupted",
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CriticalSection, "Critical section address",
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CriticalSection->LockCount, "Lock count",
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0, "Expected minimum lock count",
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CriticalSection->DebugInfo, "Critical section debug info address");
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}
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}
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else {
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//
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// SpinCount > 0 for this critical section
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//
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if( CriticalSection->OwningThread == CurrentThread ) {
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//
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// The current thread is already the owner.
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//
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InterlockedIncrement( &CriticalSection->LockCount );
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CriticalSection->RecursionCount += 1;
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#if DBG
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//
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// In a chk build we are updating this additional counter,
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||
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// just like the original function in ntdll does.
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||
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//
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CriticalSection->DebugInfo->EntryCount += 1;
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#endif
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//
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// All done, CriticalSection was already owned by the current thread
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||
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// and we have just incremented the LockCount and RecursionCount.
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||
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//
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||
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}
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||
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else {
|
||
|
|
|
||
|
|
//
|
||
|
|
// The current thread is not the owner. Attempt to acquire.
|
||
|
|
//
|
||
|
|
|
||
|
|
EnterTryAcquire:
|
||
|
|
|
||
|
|
LockCount = InterlockedCompareExchange( &CriticalSection->LockCount,
|
||
|
|
0,
|
||
|
|
-1 );
|
||
|
|
|
||
|
|
if (LockCount == -1) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// We have just aquired the critical section.
|
||
|
|
//
|
||
|
|
|
||
|
|
goto EnterSetOwnerAndRecursion;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
|
||
|
|
//
|
||
|
|
// Look if there are already other threads spinning while
|
||
|
|
// waiting for this critical section.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (CriticalSection->LockCount >= 1) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// There are other waiters for this critical section.
|
||
|
|
// Do not spin, just wait for the critical section to be
|
||
|
|
// released as if we had 0 spin count from the beginning.
|
||
|
|
//
|
||
|
|
|
||
|
|
goto EnterZeroSpinCount;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
|
||
|
|
//
|
||
|
|
// No other threads are waiting for this critical section.
|
||
|
|
//
|
||
|
|
|
||
|
|
EnterSpinOnLockCount:
|
||
|
|
|
||
|
|
if (CriticalSection->LockCount == -1) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// We have a chance for aquiring it now
|
||
|
|
//
|
||
|
|
|
||
|
|
goto EnterTryAcquire;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
|
||
|
|
//
|
||
|
|
// The critical section is still owned.
|
||
|
|
// Decrement the spin count and decide if we should continue
|
||
|
|
// to spin or simply wait for the critical section's event.
|
||
|
|
//
|
||
|
|
|
||
|
|
SpinCount -= 0;
|
||
|
|
|
||
|
|
if (SpinCount > 0) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// Spin
|
||
|
|
//
|
||
|
|
|
||
|
|
goto EnterSpinOnLockCount;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
|
||
|
|
//
|
||
|
|
// Spun enough, just wait for the critical section to be
|
||
|
|
// released as if we had 0 spin count from the beginning.
|
||
|
|
//
|
||
|
|
|
||
|
|
goto EnterZeroSpinCount;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
|
||
|
|
//
|
||
|
|
// The critical section verifier is not enabled
|
||
|
|
//
|
||
|
|
|
||
|
|
Status = RtlEnterCriticalSection ((PRTL_CRITICAL_SECTION)CriticalSection);
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
//NTSYSAPI
|
||
|
|
NTSTATUS
|
||
|
|
NTAPI
|
||
|
|
AVrfpRtlLeaveCriticalSection(
|
||
|
|
volatile RTL_CRITICAL_SECTION *CriticalSection
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
HANDLE CurrentThread;
|
||
|
|
|
||
|
|
if ((AVrfpProvider.VerifierFlags & RTL_VRF_FLG_LOCK_CHECKS) != 0 &&
|
||
|
|
RtlDllShutdownInProgress() == FALSE) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// Sanity test for DebugInfo.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (CriticalSection->DebugInfo == NULL) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// This critical section is not initialized.
|
||
|
|
//
|
||
|
|
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_NOT_INITIALIZED,
|
||
|
|
"critical section not initialized",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->DebugInfo, "Critical section debug info address",
|
||
|
|
NULL, "",
|
||
|
|
NULL, "");
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Verify that the critical section is locked before releasing.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (CriticalSection->LockCount < 0) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// The critical section is not locked
|
||
|
|
//
|
||
|
|
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_OVER_RELEASED,
|
||
|
|
"critical section over-released or corrupted",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->LockCount, "Lock count",
|
||
|
|
0, "Expected minimum lock count",
|
||
|
|
CriticalSection->DebugInfo, "Critical section debug info address");
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Verify that the current thread owns the critical section.
|
||
|
|
//
|
||
|
|
|
||
|
|
CurrentThread = NtCurrentTeb()->ClientId.UniqueThread;
|
||
|
|
|
||
|
|
if (CriticalSection->OwningThread != CurrentThread) {
|
||
|
|
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_OWNER,
|
||
|
|
"invalid critical section owner thread",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->OwningThread, "Owning thread",
|
||
|
|
CurrentThread, "Expected owning thread",
|
||
|
|
CriticalSection->DebugInfo, "Critical section debug info address");
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Verify the recursion count.
|
||
|
|
//
|
||
|
|
// ntdll\ia64\critsect.s is using RecursionCount = 0 first time
|
||
|
|
// the current thread is acquiring the critical section.
|
||
|
|
//
|
||
|
|
// ntdll\ia64\critsect.asm is using RecursionCount = 1 first time
|
||
|
|
// the current thread is acquiring the critical section.
|
||
|
|
//
|
||
|
|
|
||
|
|
|
||
|
|
#if defined(_IA64_)
|
||
|
|
|
||
|
|
if (CriticalSection->RecursionCount < 0) {
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_RECURSION_COUNT,
|
||
|
|
"invalid critical section recursion count",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->RecursionCount, "Recursion count",
|
||
|
|
0, "Expected minimum recursion count",
|
||
|
|
CriticalSection->DebugInfo, "Critical section debug info address");
|
||
|
|
}
|
||
|
|
|
||
|
|
#else //#if defined(_IA64_)
|
||
|
|
|
||
|
|
if (CriticalSection->RecursionCount < 1) {
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_RECURSION_COUNT,
|
||
|
|
"invalid critical section recursion count",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->RecursionCount, "Recursion count",
|
||
|
|
1, "Expected minimum recursion count",
|
||
|
|
CriticalSection->DebugInfo, "Critical section debug info address");
|
||
|
|
}
|
||
|
|
#endif //#if defined(_IA64_)
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = RtlLeaveCriticalSection ((PRTL_CRITICAL_SECTION)CriticalSection);
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//NTSYSAPI
|
||
|
|
NTSTATUS
|
||
|
|
NTAPI
|
||
|
|
AVrfpRtlInitializeCriticalSection(
|
||
|
|
PRTL_CRITICAL_SECTION CriticalSection
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
|
||
|
|
//
|
||
|
|
// If we could have pointers to ntdll!RtlCriticalSectionLock and
|
||
|
|
// RtlCriticalSectionList we could check for double-initialized
|
||
|
|
// critical sections here.
|
||
|
|
//
|
||
|
|
|
||
|
|
Status = RtlInitializeCriticalSection (CriticalSection);
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
//NTSYSAPI
|
||
|
|
NTSTATUS
|
||
|
|
NTAPI
|
||
|
|
AVrfpRtlInitializeCriticalSectionAndSpinCount(
|
||
|
|
PRTL_CRITICAL_SECTION CriticalSection,
|
||
|
|
ULONG SpinCount
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
|
||
|
|
//
|
||
|
|
// If we could have pointers to ntdll!RtlCriticalSectionLock and
|
||
|
|
// RtlCriticalSectionList we could check for double-initialized
|
||
|
|
// critical sections here.
|
||
|
|
//
|
||
|
|
|
||
|
|
Status = RtlInitializeCriticalSectionAndSpinCount (CriticalSection,
|
||
|
|
SpinCount);
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
//NTSYSAPI
|
||
|
|
NTSTATUS
|
||
|
|
NTAPI
|
||
|
|
AVrfpRtlDeleteCriticalSection(
|
||
|
|
PRTL_CRITICAL_SECTION CriticalSection
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
|
||
|
|
if ((AVrfpProvider.VerifierFlags & RTL_VRF_FLG_LOCK_CHECKS) != 0 &&
|
||
|
|
RtlDllShutdownInProgress() == FALSE ) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// Sanity test for DebugInfo.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (CriticalSection->DebugInfo == NULL) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// This critical section is not initialized.
|
||
|
|
//
|
||
|
|
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_NOT_INITIALIZED,
|
||
|
|
"critical section not initialized",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->DebugInfo, "Critical section debug info address",
|
||
|
|
NULL, "",
|
||
|
|
NULL, "");
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Verify that no thread owns or waits for this critical section or
|
||
|
|
// the owner is the current thread.
|
||
|
|
//
|
||
|
|
// ntdll\ia64\critsect.s is using RecursionCount = 0 first time
|
||
|
|
// the current thread is acquiring the critical section.
|
||
|
|
//
|
||
|
|
// ntdll\ia64\critsect.asm is using RecursionCount = 1 first time
|
||
|
|
// the current thread is acquiring the critical section.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (CriticalSection->LockCount != -1 &&
|
||
|
|
(CriticalSection->OwningThread != NtCurrentTeb()->ClientId.UniqueThread ||
|
||
|
|
#if defined(_IA64_)
|
||
|
|
CriticalSection->RecursionCount < 0) ) {
|
||
|
|
#else
|
||
|
|
CriticalSection->RecursionCount < 1) ) {
|
||
|
|
#endif //#if defined(_IA64_)
|
||
|
|
|
||
|
|
VERIFIER_STOP (APPLICATION_VERIFIER_LOCK_INVALID_LOCK_COUNT,
|
||
|
|
"deleting critical section with invalid lock count",
|
||
|
|
CriticalSection, "Critical section address",
|
||
|
|
CriticalSection->LockCount, "Lock count",
|
||
|
|
-1, "Expected lock count",
|
||
|
|
CriticalSection->OwningThread, "Owning thread");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = RtlDeleteCriticalSection (CriticalSection);
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|