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* [Bug gcov-profile/97921] New: [GCOV]inline function with an incremental argument lead to incorrect coverage
@ 2020-11-20 2:13 yangyibiao at outlook dot com
2020-11-20 9:16 ` [Bug gcov-profile/97921] " marxin at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: yangyibiao at outlook dot com @ 2020-11-20 2:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97921
Bug ID: 97921
Summary: [GCOV]inline function with an incremental argument
lead to incorrect coverage
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: yangyibiao at outlook dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ cat test.c
int v = 8;
__attribute__ ((noinline))
int foo(int x, ...)
{ return 0; }
extern inline __attribute__ ((always_inline, gnu_inline))
int bar(int x, ...)
{
return foo(x);
}
int main()
{
if (bar(0, ++v) != 0)
return 1;
return 0;
}
$ gcc -O0 --coverage test.c; ./a.out; gcov test.c; cat test.c.gcov
File 'test.c'
Lines executed:85.71% of 7
Creating 'test.c.gcov'
-: 0:Source:test.c
-: 0:Graph:test.gcno
-: 0:Data:test.gcda
-: 0:Runs:1
-: 1:int v = 8;
-: 2:
-: 3:__attribute__ ((noinline))
1: 4:int foo(int x, ...)
1: 5:{ return 0; }
-: 6:
-: 7:extern inline __attribute__ ((always_inline, gnu_inline))
-: 8:int bar(int x, ...)
-: 9:{
1: 10: return foo(x);
-: 11:}
-: 12:
1: 13:int main()
-: 14:{
2: 15: if (bar(0, ++v) != 0)
#####: 16: return 1;
1: 17: return 0;
-: 18:}
##########################
Line 15 is wrongly marked as executed 2 times.
When debug it in debugger and set breakpoint at Line 15, it only hit once.
$ gcc --version; gcov --version
gcc (GCC) 10.0.1 20200419 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
gcov (GCC) 10.0.1 20200419 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug gcov-profile/97921] [GCOV]inline function with an incremental argument lead to incorrect coverage
2020-11-20 2:13 [Bug gcov-profile/97921] New: [GCOV]inline function with an incremental argument lead to incorrect coverage yangyibiao at outlook dot com
@ 2020-11-20 9:16 ` marxin at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-11-20 9:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97921
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|UNCONFIRMED |RESOLVED
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 97919 ***
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-11-20 2:13 [Bug gcov-profile/97921] New: [GCOV]inline function with an incremental argument lead to incorrect coverage yangyibiao at outlook dot com
2020-11-20 9:16 ` [Bug gcov-profile/97921] " marxin at gcc dot gnu.org
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