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* [Bug other/25551] New: gcov incorrect count for lone return in block
@ 2005-12-23 18:57 gcc-bugzilla at gcc dot gnu dot org
2005-12-23 20:53 ` [Bug gcov/profile/25551] [4.0 Regression] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: gcc-bugzilla at gcc dot gnu dot org @ 2005-12-23 18:57 UTC (permalink / raw)
To: gcc-bugs
gcov incorrectly shows that a lone return statement inside a block
has executed when in fact it has not
Environment:
System: Linux mercury.acucorp.com 2.4.18-27.8.0smp #1 SMP Fri Mar 14 07:13:13
EST 2003 i686 athlon i386 GNU/Linux
Architecture: i686
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc-4.0.2/configure --prefix=/usr/local/gcc-4.0.2
How-To-Repeat:
Compile the following program, run it, then run gcov on the source:
gcc -fprofile-arcs -ftest-coverage -o foo foo.c
./foo
gcov -b foo.c
------- foo.c:
#include <stdio.h>
static void
foo(int num)
{
if (num <= 1) {
/* uncomment following line to get correct results */
// printf("num <= 1\n");
/* this return is never executed, but gcov says it is */
return;
}
printf("num > 1\n");
} /* foo */
int
main(void)
{
foo(3);
foo(3);
foo(3);
foo(3);
foo(3);
foo(3);
foo(3);
return 0;
}
------- foo.c.gcov:
-: 0:Source:foo.c
-: 0:Graph:foo.gcno
-: 0:Data:foo.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <stdio.h>
-: 2:
-: 3:static void
-: 4:foo(int num)
function foo called 7 returned 100% blocks executed 100%
7: 5:{
7: 6: if (num <= 1) {
branch 0 taken 100% (fallthrough)
branch 1 taken 0%
-: 7: /* uncomment following line to get correct results */
-: 8:// printf("num <= 1\n");
-: 9:
-: 10: /* this return is never executed, but gcov says it is
*/
7: 11: return;
-: 12: }
-: 13:
7: 14: printf("num > 1\n");
call 0 returned 100%
-: 15:} /* foo */
-: 16:
-: 17:
-: 18:int
-: 19:main(void)
function main called 1 returned 100% blocks executed 100%
1: 20:{
1: 21: foo(3);
call 0 returned 100%
1: 22: foo(3);
call 0 returned 100%
1: 23: foo(3);
call 0 returned 100%
1: 24: foo(3);
call 0 returned 100%
1: 25: foo(3);
call 0 returned 100%
1: 26: foo(3);
call 0 returned 100%
1: 27: foo(3);
call 0 returned 100%
1: 28: return 0;
-: 29:}
------- Comment #1 from mark at acucorp dot com 2005-12-23 18:57 -------
Fix:
unknown
--
Summary: gcov incorrect count for lone return in block
Product: gcc
Version: 4.0.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mark at acucorp dot com
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25551
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug gcov/profile/25551] [4.0 Regression] gcov incorrect count for lone return in block
2005-12-23 18:57 [Bug other/25551] New: gcov incorrect count for lone return in block gcc-bugzilla at gcc dot gnu dot org
@ 2005-12-23 20:53 ` pinskia at gcc dot gnu dot org
2006-01-15 22:58 ` mmitchel at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-12-23 20:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2005-12-23 20:53 -------
Confirmed, only a 4.0 regression. Works in 4.1.0 and 3.4.0.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|other |gcov/profile
Ever Confirmed|0 |1
Known to fail| |4.0.2 4.0.0
Known to work| |4.1.0 4.2.0
Last reconfirmed|0000-00-00 00:00:00 |2005-12-23 20:53:05
date| |
Summary|gcov incorrect count for |[4.0 Regression] gcov
|lone return in block |incorrect count for lone
| |return in block
Target Milestone|--- |4.0.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25551
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug gcov/profile/25551] [4.0 Regression] gcov incorrect count for lone return in block
2005-12-23 18:57 [Bug other/25551] New: gcov incorrect count for lone return in block gcc-bugzilla at gcc dot gnu dot org
2005-12-23 20:53 ` [Bug gcov/profile/25551] [4.0 Regression] " pinskia at gcc dot gnu dot org
@ 2006-01-15 22:58 ` mmitchel at gcc dot gnu dot org
2006-03-11 3:19 ` mmitchel at gcc dot gnu dot org
2007-02-03 16:10 ` [Bug gcov-profile/25551] " gdr at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2006-01-15 22:58 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from mmitchel at gcc dot gnu dot org 2006-01-15 22:58 -------
gcov is not core functionality; P2.
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25551
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug gcov/profile/25551] [4.0 Regression] gcov incorrect count for lone return in block
2005-12-23 18:57 [Bug other/25551] New: gcov incorrect count for lone return in block gcc-bugzilla at gcc dot gnu dot org
2005-12-23 20:53 ` [Bug gcov/profile/25551] [4.0 Regression] " pinskia at gcc dot gnu dot org
2006-01-15 22:58 ` mmitchel at gcc dot gnu dot org
@ 2006-03-11 3:19 ` mmitchel at gcc dot gnu dot org
2007-02-03 16:10 ` [Bug gcov-profile/25551] " gdr at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2006-03-11 3:19 UTC (permalink / raw)
To: gcc-bugs
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.3 |4.0.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25551
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug gcov-profile/25551] [4.0 Regression] gcov incorrect count for lone return in block
2005-12-23 18:57 [Bug other/25551] New: gcov incorrect count for lone return in block gcc-bugzilla at gcc dot gnu dot org
` (2 preceding siblings ...)
2006-03-11 3:19 ` mmitchel at gcc dot gnu dot org
@ 2007-02-03 16:10 ` gdr at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: gdr at gcc dot gnu dot org @ 2007-02-03 16:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from gdr at gcc dot gnu dot org 2007-02-03 16:10 -------
Fixed in GCC-4.1.0 and higher.
--
gdr at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|4.0.4 |4.1.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25551
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2007-02-03 16:10 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-12-23 18:57 [Bug other/25551] New: gcov incorrect count for lone return in block gcc-bugzilla at gcc dot gnu dot org
2005-12-23 20:53 ` [Bug gcov/profile/25551] [4.0 Regression] " pinskia at gcc dot gnu dot org
2006-01-15 22:58 ` mmitchel at gcc dot gnu dot org
2006-03-11 3:19 ` mmitchel at gcc dot gnu dot org
2007-02-03 16:10 ` [Bug gcov-profile/25551] " gdr at gcc dot gnu dot org
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