Debugging with GDB Manual HP WDB v6.3 (5900-2180, August 2012)

14.11.3.3 Commands to view information on pthread primitives
HP 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:
1. Set LD_LIBRARY_PATH to include the appropriate directory, by entering one of the following
commands:
• For 32 bit IPF applications,
export LD_LIBRARY_PATH=/opt/langtools/wdb/lib/hpux32
• For 64 bit IPF applications,
export LD_LIBRARY_PATH=/opt/langtools/wdb/lib/hpux64
• For 32 bit PA applications,
export LD_LIBRARY_PATH=/opt/langtools/wdb/lib
• For 64-bit PA applications,
export LD_LIBRARY_PATH=/opt/langtools/wdb/lib/pa20_64
2. Set the environment variable PTHR_TRACE_ENABLED to on as export
PTHR_TRACE_ENABLED=on
3. Complete one of the following steps to preload the librtc runtime library:
• Set the target application to preload librtc by using the +rtc option for the chatr
command. In addition to automatically loading the librtc library, the +rtc option for
the chatr command also maps the shared libraries as private. To enable or disable the
target application to preload the librtc runtime library, enter the following command
at the HP-UX prompt:
$ chatr +rtc <enable|disable> <executable>
NOTE: The chatr +rtc option preloads the librtc runtime library from the following
default paths:
144 HP-UX Configuration-Specific Information