[parisc-linux] gcc instrument-function on parisc?

[John David Anglin]

> OTOH I find this comment in gcc-4.0 info:
> `-finstrument-functions'
>      Generate instrumentation calls for entry and exit to functions.
>      Just after function entry and just before function exit, the
>      following profiling functions will be called with the address of
>      the current function and its call site.  (On some platforms,
>      `__builtin_return_address' does not work beyond the current
>      function, so the call site information may not be available to the
>      profiling functions otherwise.)
> 
> Is 'some platform' include parisc?

Yes, `__builtin_return_address' only provides the return address
for the current function on PA-RISC (on some targets, it can unwind
multiple levels).  There's some question in my mind as to whether it
handles all stubs correctly.  If it detects a stub, it tries to
provide the return address for the stub.  It's guaranteed not to
work in a signal handler.

The above hasn't really been tested as far as I know on parisc.

Dave
-- 
J. David Anglin                                  dave.anglin at nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)