Re: Regarding __gcov_dump and __gcov_reset usage

Gejoe Daniel gejoed@rediffmail.com
Tue May 25 07:05:37 GMT 2021


Hi Martin,

The bug is created : https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100751
 Let me know if any more info is required.

Thanks,
Gejoe

From: Martin Li ka <mliska@suse.cz>
Sent: Mon, 24 May 2021 19:32:10
To: Gejoe Daniel <gejoed@rediffmail.com>, gcc@gcc.gnu.org, gcc-help@gcc.gnu.org
Subject: Re: Regarding __gcov_dump and __gcov_reset usage

On 5/24/21 1:44 PM, Gejoe Daniel via Gcc wrote:
> Adding gcc mailing list for the clarification.
>
> Thank you team !&nbsp;
>
> From: &quot;Gejoe Daniel&quot;&lt;gejoed@rediffmail.com>;
> Sent: Mon, 24 May 2021 15:02:12
> To: &quot;gcc-help@gcc.gnu.org";&lt;gcc-help@gcc.gnu.org>;
> Subject: Re: Regarding __gcov_dump and __gcov_reset usage
>
> Hi team,
>
> Any info/reply ?
>
> Thanking you in advance,
> Gejoe
>
>
> From: &quot;Gejoe Daniel&quot;&lt;gejoed@rediffmail.com>;
> Sent: Sun, 16 May 2021 17:37:46
> To: &lt;gcc-help@gcc.gnu.org>;
> Subject: Regarding __gcov_dump and __gcov_reset usage
>
> Hi team,
>
> I did go through the online manual of gcc gcov&nbsp; on __gcov_dump() and __gcov_reset() :
> https://gcc.gnu.org/onlinedocs/gcc/Gcov-and-Optimization.html#Gcov-and-Optimization
>
> I tried out using the functions in a sample program (sample-prog.c) that is attached here.
>
> The steps followed were :
>
> (1)&nbsp; gcc -fprofile-arcs -ftest-coverage sample-prog.c&nbsp;
> (2)&nbsp; ./a.out
> (3)&nbsp;&nbsp;gcov sample-prog.c
>
> While running a.out, when I give character &#39;g&#39;, the __gcov_dump() must be invoked.
> What I could observe is that first time __gcov_dump() is invoked , the sample-prog.gcda file gets created.
> For the second time and then onwards, __gcov_dump() invocation (by giving &#39;g&#39; character during the a.out run) doesn&#39;t happen.
> This is concluded by looking at the time stamp of sample-prog.gcda file in the same folder. It was still having the same time stamp of first time invocation of __gcov_dump().
>
> Another thing is&nbsp; that, __gcov_reset() also doesn&#39;t appear to work. I tried giving the character &#39;r&#39; during the run of the program but couldn&#39;t see the counters getting reset to 0 in the sample-prog.gcov file. The previous values of lines covered were there.
>
> Let me know if my approach is correct or if I miss any information here.
>
> Thanks,
> Gejoe
> &nbsp;
>

Hello.

Can you please create bug at: https://gcc.gnu.org/bugzilla/
Please upload there a test-case and series of commands executed and the expected result.

Thank you,
Martin


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