Filter
Top Products
features are available as options to the set thread-check command. The syntax for
the set thread-check command is as follows:
set thread check { [on|off]| [option] [on|off] |[option] [num]}
The set thread-check [on|off] command enables or disables advanced thread
debugging. This feature is off by default. The set thread-check [on|off]
command must be enabled prior to running the application under the debugger, to
force the underlying runtime system to collect information on pthread primitives.
The advanced thread debugging features can be enabled only if the set
thread-check [on] command is enabled. The following advanced thread debugging
options are available for the set thread-check command:
recursive-relock [on|off] This set thread-check recursive-relock
[on|off] command checks if a thread has
attempted to acquire a non-recursive mutex that
it currently holds. Re-locking a non-recursive
mutex results in a deadlock. At run-time, the
debugger keeps track of each mutex in the
application and the thread that currently holds
each mutex. When a thread attempts to acquire
a lock on a non-recursive mutex, the debugger
checks if the thread currently holds the lock
object for the mutex. The debugger transfers the
execution control to the user and prints a
warning message when this condition is detected.
unlock-not-own [on|off] The set thread-check unlock-not-own
[on|off] command checks if a thread has
attempted to unlock a mutex or a read-write lock
that it has not acquired. The debugger transfers
the execution control to the user and prints a
warning message when this condition is detected.
mixed-sched-policy [on|off] The set thread-check
mixed-sched-policy [on|off] command
checks if a thread is waiting (blocked) on a mutex
or a read-write lock that is held by a thread with
a different scheduling policy. This is not an
application error and does not always result in
deadlock. However, it degrades the application
performance. The debugger transfers the
execution control to the user and prints a
warning message when this condition is detected.
cv-multiple-mxs [on|off] The set thread-check cv-multiple-mxs
[on|off] command checks if an application
184 HP-UX Configuration-Specific Information