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| gcov functions raimbaul@lirmm.fr (Sebastien RAIMBAULT) (2000-08-27) |
| Re: gcov functions derek@knosof.co.uk (2000-09-02) |
| From: | derek@knosof.co.uk (Derek M Jones) |
| Newsgroups: | comp.compilers |
| Date: | 2 Sep 2000 16:20:34 -0400 |
| Organization: | Knowledge Software |
| References: | 00-08-114 |
| Keywords: | analysis |
Sebastien,
>I would like to use the informations handled by -ftest-coverage and
>-fprofile-arcs options of gcc for gcov, but at run time (without writing
>to .da files). I can't find information about the functions used (with
>objdump, I've seen __bb__exit and other __bb* functions).
>What I need is to get the bb counts at some points in the program to
>compute an evaluation of the current time (with a precomputed evaluation
>of each bb).
The only way forward is to get a copy of the gcc sources and edit them
yourself. The file that contains these functions is libgcc2.c.
Watch out. The version of gcc shipped with RedHat 6.2, egcs-2.91.66,
contains a bug that prevents it writing line number information with
each basic block (you get the offset in the generated assembler only).
So I recommend you get hold of the latest sources, which don't have this
problem.
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