| Debugging Critical Section Errors |
!cs debugger extension
!cs can be used in both user-mode debugger and kernel debugger to display information about critical sections in the current process. Matching symbols with type information is required, especially for ntdll.dll.
The syntax for this extension is:
cs [-s]�� ���������������������� - dump all the active critical sections in the current process.
!cs [-s] address���� ������ - dump critical section at this address.
!cs [-s] -d address� ����� - dump critical section corresponding to DebugInfo at this address.
-s will dump the critical section initialization stack trace if it's available.
Examples:
Dump information about a critical section using its address
0:001> ! cs 0x7803B0F8
Critical section�� = 0x7803B0F8 (MSVCRT!__app_type+0x4)
DebugInfo��������� = 0x6A262080
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
Dump information about a critical section using its address, including initialization stack trace
0:001> !cs -s 0x7803B0F8
Critical section�� = 0x7803B0F8 (MSVCRT!__app_type+0x4)
DebugInfo��������� = 0x6A262080
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
Stack trace for DebugInfo = 0x6A262080:
0x6A2137BD: ntdll!RtlInitializeCriticalSectionAndSpinCount+0x9B
0x6A207A4C: ntdll!LdrpCallInitRoutine+0x14
0x6A205569: ntdll!LdrpRunInitializeRoutines+0x1D9
0x6A20DCE1: ntdll!LdrpInitializeProcess+0xAE5
Dump information about a critical section using its debug info address
0:001> !cs -d 0x6A262080
DebugInfo��������� = 0x6A262080
Critical section�� = 0x7803B0F8 (MSVCRT!__app_type+0x4)
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
Dump information about a critical section using its debug info address, including initialization stack trace
0:001> !cs -s -d 0x6A262080
DebugInfo��������� = 0x6A262080
Critical section�� = 0x7803B0F8 (MSVCRT!__app_type+0x4)
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
Stack trace for DebugInfo = 0x6A262080:
0x6A2137BD: ntdll!RtlInitializeCriticalSectionAndSpinCount+0x9B
0x6A207A4C: ntdll!LdrpCallInitRoutine+0x14
0x6A205569: ntdll!LdrpRunInitializeRoutines+0x1D9
0x6A20DCE1: ntdll!LdrpInitializeProcess+0xAE
Dump information about all the active critical sections in the current process
0:001> !cs
-----------------------------------------
DebugInfo��������� = 0x6A261D60
Critical section�� = 0x6A262820 (ntdll!RtlCriticalSectionLock+0x0)
LOCKED
LockCount��������� = 0x0
OwningThread������ = 0x460
RecursionCount���� = 0x1
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
-----------------------------------------
DebugInfo��������� = 0x6A261D80
Critical section�� = 0x6A262580 (ntdll!DeferedCriticalSection+0x0)
NOT LOCKED
LockSemaphore����� = 0x7FC
SpinCount��������� = 0x0
-----------------------------------------
DebugInfo��������� = 0x6A262600
Critical section�� = 0x6A26074C (ntdll!LoaderLock+0x0)
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
.....
Dump information about all the active critical sections in the current process, including initialization stack trace
0:001> !cs -s
...
-----------------------------------------
DebugInfo������ ���= 0x6A261EA0
Critical section�� = 0xA8001C (+0xA8001C)
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
No stack trace saved
-----------------------------------------
DebugInfo��������� = 0x6A261EC0
Critical section�� = 0x6A263560 (ntdll!RtlpDphTargetDllsLock+0x0)
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
No stack trace saved
-----------------------------------------
DebugInfo��������� = 0x6A261EE0
Critical section�� = 0xA90608 (+0xA90608)
NOT LOCKED
LockSemaphore����� = 0x7EC
SpinCount��������� = 0x0
Stack trace for DebugInfo = 0x6A261EE0:
0x6A2137BD: ntdll!RtlInitializeCriticalSectionAndSpinCount+0x9B
0x6A20B0DC: ntdll!CsrpConnectToServer+0x1BE
0x6A20B2AA: ntdll!CsrClientConnectToServer+0x148
0x77DBE83F: KERNEL32!BaseDllInitialize+0x11F
0x6A207A4C: ntdll!LdrpCallInitRoutine+0x14
0x6A205569: ntdll!LdrpRunInitializeRoutines+0x1D9
0x6A20DCE1: ntdll!LdrpInitializeProcess+0xAE5
-----------------------------------------
DebugInfo��������� = 0x6A261F00
Critical section�� = 0x77E1AEB8 (KERNEL32!BaseDllRegistryCache+0x18)
NOT LOCKED
LockSemaphore����� = 0x0
SpinCount��������� = 0x0
Stack trace for DebugInfo = 0x6A261F00:
0x6A2137BD: ntdll!RtlInitializeCriticalSectionAndSpinCount+0x9B
0x6A207A4C: ntdll!LdrpCallInitRoutine+0x14
0x6A205569: ntdll!LdrpRunInitializeRoutines+0x1D9
0x6A20DCE1: ntdll!LdrpInitializeProcess+0xAE5