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* [Bug gcov-profile/101623] New: [GCOV] Wrong coverage of callee function
@ 2021-07-26 11:59 njuwy at smail dot nju.edu.cn
2021-08-13 10:36 ` [Bug gcov-profile/101623] " njuwy at smail dot nju.edu.cn
0 siblings, 1 reply; 2+ messages in thread
From: njuwy at smail dot nju.edu.cn @ 2021-07-26 11:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101623
Bug ID: 101623
Summary: [GCOV] Wrong coverage of callee function
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: njuwy at smail dot nju.edu.cn
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/10.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure -enable-checking=release -enable-languages=c,c++
-disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.2.0 (GCC)
$ cat test.c
#include<stdlib.h>
char a[] = "12345";
char b[] = "12345";
void loop(char *pz, char *pzDta) {
for (;;) {
switch (*(pz++) = *(pzDta++)) {
case 0:
goto loopDone2;
case '"':
case '\\':
pz[-1] = '\\';
*(pz++) = pzDta[-1];
}
}
loopDone2:;
if (a - pz != b - pzDta)
abort();
}
int main() {
loop(a, b);
exit(0);
}
$ gcc -O0 --coverage test.c;./a.out;gcov test;cat test.c.gcov
libgcov profiling error:/home/wangyang/coverage/test/test.gcda:overwriting an
existing profile data with a different timestamp
File 'test.c'
Lines executed:71.43% of 14
Creating 'test.c.gcov'
-: 0:Source:test.c
-: 0:Graph:test.gcno
-: 0:Data:test.gcda
-: 0:Runs:1
-: 1:#include<stdlib.h>
-: 2:char a[] = "12345";
-: 3:char b[] = "12345";
-: 4:
6: 5:void loop(char *pz, char *pzDta) {
-: 6: for (;;) {
6: 7: switch (*(pz++) = *(pzDta++)) {
1: 8: case 0:
1: 9: goto loopDone2;
-: 10:
#####: 11: case '"':
-: 12: case '\\':
#####: 13: pz[-1] = '\\';
#####: 14: *(pz++) = pzDta[-1];
-: 15: }
-: 16: }
1: 17:loopDone2:;
-: 18:
1: 19: if (a - pz != b - pzDta)
#####: 20: abort();
1: 21:}
-: 22:
1: 23:int main() {
1: 24: loop(a, b);
1: 25: exit(0);
-: 26:}
Line 5 was executed only once.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug gcov-profile/101623] [GCOV] Wrong coverage of callee function
2021-07-26 11:59 [Bug gcov-profile/101623] New: [GCOV] Wrong coverage of callee function njuwy at smail dot nju.edu.cn
@ 2021-08-13 10:36 ` njuwy at smail dot nju.edu.cn
0 siblings, 0 replies; 2+ messages in thread
From: njuwy at smail dot nju.edu.cn @ 2021-08-13 10:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101623
Yang Wang <njuwy at smail dot nju.edu.cn> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Yang Wang <njuwy at smail dot nju.edu.cn> ---
dup
*** This bug has been marked as a duplicate of bug 101192 ***
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-07-26 11:59 [Bug gcov-profile/101623] New: [GCOV] Wrong coverage of callee function njuwy at smail dot nju.edu.cn
2021-08-13 10:36 ` [Bug gcov-profile/101623] " njuwy at smail dot nju.edu.cn
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