Debugging Dynamic Memory Usage Errors Using HP WDB v6.3 (5900-2181, August 2012)

Pre-loading the Appropriate Version of librtc.[sl|so] Along With the Application

The appropriate version of the librtc.[sl|so] runtime library must be preloaded to enable

batch mode and attach mode memory debugging of an application.

You can explicitly preload librtc.[sl|so] from the appropriate path by using the LD_PRELOAD

environment variable.

Alternately you can use the +rtc <enable|disable> option for the chatr command to

automatically preload librtc.[sl|so]. Both of these methods are illustrated in this section.

NOTE: The +mem_check <enable> option for the chatr command is available for dynamic

linker versions B.11.61 and later on HP 9000 systems, and dynamic linker versions B.12.46

and later on Integrity systems.

The +rtc <enable> option for the chatr command is available for dynamic linker versions

B.11.66 and later on HP 9000 systems, and dynamic linker versions B.12.51 and later on

Integrity systems. However, +mem_check option is retained with the latest Linker version.

Using chatr +rtc to Automatically Preload librtc.[sl|so]

To automatically preload librtc.[sl|so] by using the +rtc <enable|disable> for the

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

$ chatr +rtc <enable> <executable>

In addition to automatically loading librtc.[sl|so], the +rtc option for the chatr command

also maps the shared libraries as private. The +rtc option preloads librtc.[sl|so] from

the following default paths for librtc.[sl|so] :

• - For 32 bit IPF applications

/opt/langtools/lib/hpux32/librtc.so

• For 64 bit IPF applications,

/opt/langtools/lib/hpux64/librtc.so

• For 32 bit PA applications,

opt/langtools/lib/librtc.sl

• For 64-bit PA applications,

/opt/langtools/lib/pa20_64/librtc.sl

NOTE: To preload from a path that is different from the default paths, you must use the

LD_PRELOAD environment variable.

Using LD_PRELOAD TO Preload librtc.[sl|so]

To explicitly preload an appropriate version of librtc.[sl|so] with the application, set the

environment variable, LD_PRELOAD as follows:

• For 32-bit applications running on Itanium,

LD_PRELOAD=/opt/langtools/lib/hpux32/librtc.so <executable> <arguments>

• For 64-bit applications running on Itanium,

LD_PRELOAD=/opt/langtools/lib/hpux64/librtc.so <executable> <arguments>

• For 32-bit applications running on PA-RISC,

LD_PRELOAD=/opt/langtools/lib/librtc.sl <executable> <arguments>

• For 64-bit applications running on PA-RISC,

LD_PRELOAD=/opt/langtools/lib/pa20_64/librtc.sl <executable> <arguments>