HP WDB GUI 5.8 Reference Manual ( February 2008 )

Debugging with WDB GUI

Advanced Thread Debugging Support

Chapter 382

Advanced Thread Debugging Support

WDB GUI 5.6 and later versions provide advanced thread debugging support to view the state

of pthread primitives in applications running on 11i v2, or 11i v3 operating systems. You can

view extended information on the state of threads, read-write locks, mutexes and conditional

variables.

Prerequisites for Advanced Thread Debugging in WDB GUI

The following pre-requisites apply for advanced thread debugging in WDB GUI:

• The advanced thread debugging features are supported for PA-RISC and Itanium

applications running on HP-UX 11i v2 and later versions of the operating system. HP

WDB GUI does not support thread debugging of PA-RISC applications on Integrity

systems

•The tracing pthread library is required for advanced thread-debugging. The pthread

tracer library is available by default on systems running HP-UX 11i v2 or later.

• The thread debugging feature in HP WDB is dependent on the availability of the Dynamic

Linker Version B.11.19.

•HP WDB GUI uses librtc.sl to enable thread debugging support. If the debugger is

installed in a directory other than the default /opt/langtools/bin directory, you must

use the environment variable, LIBRTC_SERVER, to export the path of the appropriate

version of librtc.sl.

• HP WDB GUI does not support debugging of programs that link with the archive version

of the standard C library, libc.a, or the core library, libcl.a. The programs must be

linked with libc.sl.

• For PA-RISC 32-bit applications, the dynamic library path look-up must be enabled for

advanced thread debugging. To enable dynamic library path look-up for advanced thread

debugging, enter the following command at HP-UX prompt:

# chatr +s enable <PA32-bitApp>

This command automatically enables dynamic library path look-up. No additional

environmental variables are required.

Support for info thread, info thread <thread-id> and set thread check

To view information on the state of the current threads in the application, complete the

following steps: