Debugging with GDB (September 2007)

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Chapter 14: HP-UX Conﬁguration-Speciﬁc Information 159

[num]. The debugger transfers the execution control to the use r 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] com mand displays a list of known threads. If a

thread-id is provided, the command displays extended information on the spe ci-

ﬁed 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,

LD_LIBRARY_PATH=/opt/langtools/wdb/lib/hpux32

- For 64 bit IPF applications,

LD_LIBRARY_PATH=/opt/langtools/wdb/lib/hpux64

- For 32 bit PA applications,

LD_LIBRARY_PATH=/opt/langtools/wdb/lib