Ian Lance Taylor <iant@xxxxxxxxxx> said:
> "Paul Sery" <pgsery@xxxxxxxx> writes:
>
> > I want to create a plugin that inserts custom code before function calls. The
> > plugin would mimic the way fprofile-arcs instruments function calls, but not
> > other structures. For instance, I'd like to modify the following code,
> > ...
> > I think/guess the best place for this to occur is in the assembler, like
> > finstrument-functions?
>
> The assembler is an OK place to hack things which change the function
> prologue or epilogue. It sounds like you want to change the actual body
> of the function, which is quite different. I would suggest working at
> the GIMPLE level instead, and modifying function calls there.
>
Ok, I'll go that route. Can I use the single function like the
finstrument-functions option uses?
...
profile_function_entry_libfunc
= init_one_libfunc ("__cyg_profile_func_enter");
--->
profile_function_entry_libfunc
= init_one_libfunc ("__myfn");
or perhaps I should mimic the way the gcov option works?
...
= build_function_type_list (void_type_node,...
= build_fn_decl ("__gcov_interval_profiler",
...
Thanks,
Paul
