* Fw: Regarding __gcov_dump and __gcov_reset usage
@ 2021-05-24 11:44 Gejoe Daniel
2021-05-24 14:02 ` Martin Liška
0 siblings, 1 reply; 3+ messages in thread
From: Gejoe Daniel @ 2021-05-24 11:44 UTC (permalink / raw)
To: gcc, gcc-help
[-- Attachment #1: Type: text/plain, Size: 1839 bytes --]
Adding gcc mailing list for the clarification.
Thank you team !
From: "Gejoe Daniel"<gejoed@rediffmail.com>
Sent: Mon, 24 May 2021 15:02:12
To: "gcc-help@gcc.gnu.org"<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: "Gejoe Daniel"<gejoed@rediffmail.com>
Sent: Sun, 16 May 2021 17:37:46
To: <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 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) gcc -fprofile-arcs -ftest-coverage sample-prog.c
(2) ./a.out
(3) gcov sample-prog.c
While running a.out, when I give character 'g', 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 'g' character during the a.out run) doesn'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 that, __gcov_reset() also doesn't appear to work. I tried giving the character 'r' during the run of the program but couldn'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
[-- Attachment #2: sample-prog.c --]
[-- Type: application/octet-stream, Size: 535 bytes --]
// sample-prog.c
#include <stdio.h>
#include <ctype.h>
#include <unistd.h>
extern void __gcov_reset(void);
extern void __gcov_flush(void);
extern void __gcov_dump( void);
int main()
{
unsigned char c;
int result;
unsigned char data[]={127,49,255,255};
c = '5';
do {
c = getchar();
result = isalnum(c);
printf("When %c is passed, return value is %d\n", c, result);
if(c == 'g')
__gcov_dump();
else if(c == 'r')
__gcov_reset();
}while(c != 'c');
return 0;
}
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Fw: Regarding __gcov_dump and __gcov_reset usage
2021-05-24 11:44 Fw: Regarding __gcov_dump and __gcov_reset usage Gejoe Daniel
@ 2021-05-24 14:02 ` Martin Liška
2021-05-25 7:05 ` Gejoe Daniel
0 siblings, 1 reply; 3+ messages in thread
From: Martin Liška @ 2021-05-24 14:02 UTC (permalink / raw)
To: Gejoe Daniel, gcc, gcc-help
On 5/24/21 1:44 PM, Gejoe Daniel via Gcc wrote:
> Adding gcc mailing list for the clarification.
>
> Thank you team !
>
> From: "Gejoe Daniel"<gejoed@rediffmail.com>
> Sent: Mon, 24 May 2021 15:02:12
> To: "gcc-help@gcc.gnu.org"<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: "Gejoe Daniel"<gejoed@rediffmail.com>
> Sent: Sun, 16 May 2021 17:37:46
> To: <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 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) gcc -fprofile-arcs -ftest-coverage sample-prog.c
> (2) ./a.out
> (3) gcov sample-prog.c
>
> While running a.out, when I give character 'g', 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 'g' character during the a.out run) doesn'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 that, __gcov_reset() also doesn't appear to work. I tried giving the character 'r' during the run of the program but couldn'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
>
>
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Regarding __gcov_dump and __gcov_reset usage
2021-05-24 14:02 ` Martin Liška
@ 2021-05-25 7:05 ` Gejoe Daniel
0 siblings, 0 replies; 3+ messages in thread
From: Gejoe Daniel @ 2021-05-25 7:05 UTC (permalink / raw)
To: Martin Li ka; +Cc: gcc, gcc-help
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
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-05-24 11:44 Fw: Regarding __gcov_dump and __gcov_reset usage Gejoe Daniel
2021-05-24 14:02 ` Martin Liška
2021-05-25 7:05 ` Gejoe Daniel
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