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The first tool is a shared library interposer called mem_on_exit.so. Listing 1 contains its source code. To build this interposer, use the following command:
cc -o mem_on_exit.so -G -Kpic mem_on_exit.c
To use it (from a Pro/ENGINEER startup script, for example) do the following (we are using the C-shell syntax in this example):
setenv LD_PRELOAD /full_path/mem_on_exit.so
[ Run Pro/ENGINEER as usual ]
unsetenv LD_PRELOAD
Shared library interposers are programs capable of intercepting calls the application makes to any shared library. Once such a call is intercepted, the interposer can do whatever you need, and then call the real function originally intended by the application.
Library interposers are very useful for all kinds of debugging, testing, and collection of runtime data statistics. They can even be used to fix bugs by modifying the behavior of the interposed function. They can do all this without rebuilding the application in any way.
In this case, the library can interpose on system call exit(2), which most applications (including Pro/ENGINEER) invoke at the end of the run to exit to the operating system. First, it can determine the name of the executable that made the call. The library can use Solaris proc(4) interface for it. (Note: the version of the proc(4) interface shown here works with Solaris 2.6 and later.) Pro/ENGINEER main executable is called "pro". So if the current executable is called "pro", the library can call system(3S) invoking a Perl script called measure_proe_mem.pl. After that is finished, call the real system exit(2) routine.
I will assume that the directory where script measure_proe_mem.pl (described later) is installed in is on the shell $PATH. Alternatively, you can put the full path to measure_proe_mem.pl in the system() call.
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