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Re: Information on profiling
Harald Servat <harald.servat@bsc.es> writes:
>>> 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?
gcc/config/i386/i386.h and gcc/config/i386/i386.c.
>>> * 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?
Profiling is not built on top of code coverage. As far as I know they
are more or less independent.
Ian