PGI User Forum

[rjaekel]

Hi all,

I'm trying to implement my own version of the function instrumenter on a 64bit Linux machine to insert calls of the ___rouent function to the user code, which is provided by the -Mprof=func compiler option.
On my particular machine a function call of

void ___rouent64( struct s1* p )

gets inserted, but the delivered structure by the compiler is not generated as usual and causes a segmentation fault. I do not observe this behaviour at a
32bit machine via a ___rouent(...) call. I've tested versions PGI 8.0.1 and 7.1.3.

Could it be that the structur is somehow different (not an empty pointer)?

Any ideas how to track this down?

Thanks in advance!

[mkcolg]

Hi rjaekel,

To have the compiler call your own profiling routines, you'll want to compile with the "-Minstrument" flag. It's the same as -Mprof=func, except instead of calling rouent, it calls the user defined functions "__cyg_profile_func_enter" and "__cyg_profile_func_exit".

[rjaekel]

Hi Mat,

your completely right for, the version 9 of the PGI compiler uses the underlaying GNU way of function instrumentation, but not previous versions.
I've already implemented a version for the new compiler version, but I need an implementation for the older versions as well, which include different function calls. As I said earlier, the 32bit version is doing exactly what it sould, but not the 64bit version.

Thanks

Rene

[mkcolg]

Hi Rene,

If it helps, "-Minstrument" was added as of 8.0-2.

For "___rouent64", we actually using a non-standard ABI which makes it difficult for users to overload this function. It is possible, but requires you to write a wrapper in assembly. I'll see if can find my code from a few years ago. Of course, this would not be recommended nor supported.

- Mat

[rjaekel]

Hi Mat