Debugging threads with HP Wilde Beest

• Advanced thread-debugging requires the pthread tracing library. The pthread

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

HP WDB 5.5 and later versions support enhanced thread debugging. The

installation scripts for HP WDB 5.5 and later versions of the debugger automatically

add links at /opt/langtools/lib/ to replace the standard libpthread library

with libpthread tracer library at run time.

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

is available in a directory other than the default /opt/langtools/bin directory,

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

appropriate version of librtc.sl.

• For PA-RISC 32 bit applications, enable the dynamic path look-up for advanced

thread debugging.

• The chatr +rtc feature requires linker version B.11.66 and later on HP 9000

systems, and linker version B.12.51 and later on Integrity systems.

NOTE: 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.

Modes of Thread debugging in HP WDB

HP WDB offers three modes of Thread debugging:

• Interactive Mode

• Batch Mode

• Attach Mode

• The +check Mode

Thread-debugging in Interactive mode

Interactive mode of thread debugging is available for multi-threaded applications

running on HP-UX 11iv2, or HP-UX 11iv3.

Using thread-debugging feature in HP WDB

Complete the following steps to use the thread-debugging feature in interactive mode:

1. Compile the program with –mt option to include threads in compilation:

$ cc –mt –o a.out filename.c

2. Navigate to the path where gdb is available.

3. Enter the following command to invoke gdb:

$ ./gdb