When build mhook in debug mode, in function SuspendOneThread:
ODPRINTF((L"mhooks: SuspendOneThread: Successfully suspended thread %d - IP is at %p", dwThreadId, pIp)); break;
and in ODPRINTF will call _vscwprintf, in _vscwprintf it potential call _free_dbg, this will acquire the VCRuntime lock. At the meantime, if the suspended thread is doing some malloc or free and hold the runtime lock, the program will hang.
When build mhook in debug mode, in function SuspendOneThread:
ODPRINTF((L"mhooks: SuspendOneThread: Successfully suspended thread %d - IP is at %p", dwThreadId, pIp)); break;and in ODPRINTF will call _vscwprintf, in _vscwprintf it potential call _free_dbg, this will acquire the VCRuntime lock. At the meantime, if the suspended thread is doing some malloc or free and hold the runtime lock, the program will hang.