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Re: Information on profiling
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Hello,
En/na Ian Lance Taylor ha escrit:
> Harald Servat <harald.servat@bsc.es> writes:
>
>> Is there any pointer on how GCC deals to generate profiles (-p/-pg flags)?
>
> There may be, but I doubt it.
>
>> In particular, I'm looking for information on (but not only):
>>
>> * How GCC instruments user routines when compiling a C file using -p/-pg
>
> It varies by target. You need to look at the gcc backend for your
> target.
Sorry, but I can't figure at what kind of backend are you referring
to. Let's suppose I'm interested on i386 architecture and C compiled
files, where in should I start looking?
>> * Where I can find the instrumentation code (i.e., the code called at
>> entry and exit points of user routines). Does it belongs to GCC package?
>> Or maybe belongs to a foreign package lib GLIBC?
>
> The entry/exit code is part of gcc. The code that it calls is mostly
> in gcc/libgcov.c.
>
Does it mean that the profile is built on top (or reuses code) from
the code coverage mechanism?
Thank you very much.
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