Debugging with GDB (September 2007)

Chapter 14: HP-UX Configuration-Specific Information 139
scramble_blocks=on|off (or) set heap-check scramble <on/off>
Enables block scrambling.
Batch mode leak detection stops the application at the end, when libraries are being
unloaded, and invokes HP WDB to print the leak or heap data.
Note:
It is incorrect usage to use spaces before or after the ’=’ symbol in the batch
mode configuration options in the configuration file, rtcconfig. Additionally,
it is incorrect usage to use spaces before the batch mode configuration options.
For example:
Correct Usage:
$ cat rtcconfig
check_leaks=on
check_heap=on
files=batchrtc4
$
Incorrect Usage:
$ cat rtcconfig
check_leaks=on
check_heap = on
files=batchrtc4
$
Steps for Batch Mode Memory Debugging
To use batch memory debugging, complete the following steps:
1. Compile the source files
2. Create an rtcconfig file in the current directory.
3. Define an environment variable BATCH_RTC. If you are using the Korn or Posix shell,
enter the following command at the HP-UX prompt:
export BATCH_RTC=on
4. Complete one of the following steps to preload the librtc runtime library:
• Set the target application to preload librtc by using the +mem_check option for
the chatr command. In addition to automatically loading the librtc library,
the +mem_check 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 +mem_check <enable|disable> <executable>
Note: The chatr +mem_check option preloads the librtc runtime library from
the following default paths: