HP-UX Programming Tools Release Notes

Chapter 4 29

Problem Descriptions and Fixes

Problems and Limitations

1. Issue the dde command without a target program argument.

$ dde

2. Turn on system-level debugging.

pro sys -on

NOTE Turning on system-level debugging in step 2 will prevent the debugger

from setting the usual breakpoints at the entry and exit statements of

the main program. To establish those breakpoints, use the following

commands:

bre main

bre main\$

3. Issue the debug command to debug your program. The debugger

stops at the beginning of the system code that precedes the main

program.

deb myprog

(Warning) "Property system -on" causes deferred

availability of shared library information.

Executing image in process 29969: "/home/smith/myprog".

Stopped at: $START$ (00001FB0)

4. Turn off system-level debugging.

pro sys -off

5. Use the initialize -altdbinfo command to load alternate

debugging information for shared libraries, so that you have access to

system library entry points.

ini -alt

6. Set a breakpoint on the system routine __map_dld, then issue the go

command. (Note that the name __map_dld begins with two

underscores.) When the debugger stops, you can delete the

breakpoint. Then, issue a go -return command. This causes the

debugger to stop immediately after the shared libraries are loaded.

bre __map_dld

Breakpoint(s) set.

lis bre

breakpoint \\__map_dld # `va(00002254) ;# [33]