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num-waiters [num] The set thread-check num-waiters
[num] command checks if the number of threads
waiting on any pthread object exceeds the
specified threshold number [num]. The debugger
transfers the execution control to the user and
prints a warning message when this condition is
detected.
14.11.3.3 Commands to view information on pthread primitives
WDB 5.5 and later versions of the debugger display extended information on pthread
primitives for multi-threaded applications running on HP-UX 11i v2, or 11i v3. This
feature is available only if the set thread-check [on|off] command is enabled.
The following commands enable you to view extended information on threads, mutexes,
read-write locks and conditional variables in multi-threaded applications:
info thread [thread-id] The info thread [thread-id] command
displays a list of known threads. If a thread-id is
provided, the command displays extended
information on the specified thread.
info mutex [mutex-id] The info mutex [mutex-id] command
displays a list of known mutexes. If a mutex-id
is provided, the command displays extended
information on the specified mutex.
info condvar [condvar-id] The info condvar [condvar-id] command
displays a list of known condition variables. If
condvar-id is provided, the command displays
extended information on the specified condition
variable.
info rwlock [rwlock-id] The info rwlock [rwlock-id] command
displays a list of known read-write locks. If
rwlock-id is provided, the command displays
extended information on the specified read-write
lock.
14.11.4 Debugging Threads Interactively After Attaching to a Process
HP WDB provides support to attach a running process to the debugger. To use thread
debugging commands after attaching GDB to a running process, complete the following
steps:
14.11 Thread Debugging Support 187