Re: Instrumented functions and line numbers

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On 06/09/12 03:23, Malte Forkel wrote:
Am 04.09.2012 23:28, schrieb Ian Lance Taylor:
I don't know anything about dwfl.  But you haven't showed us the
important piece of information: where does addr come from in the call
to addr_print?

Both __cyg_profile_func_enter and __cyg_profile_func_exit have
parameters 'void *this_fn' and 'void *call_site', the address of the
current function and its call site (see
http://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#index-finstrument_002dfunctions-2296).


If memory serves me correctly the call site is implemented in terms of __builtin_return_address (or something similar).

This then isn't the address of the call, but the address to which the function returns after executing.

        Patrick


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