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* [Bug gcov-profile/99440] New: [GCOV] Wrong coverage with callsite
@ 2021-03-07 7:36 dz1933028 at smail dot nju.edu.cn
2021-03-08 9:10 ` [Bug gcov-profile/99440] " marxin at gcc dot gnu.org
2021-08-06 11:39 ` njuwy at smail dot nju.edu.cn
0 siblings, 2 replies; 3+ messages in thread
From: dz1933028 at smail dot nju.edu.cn @ 2021-03-07 7:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99440
Bug ID: 99440
Summary: [GCOV] Wrong coverage with callsite
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: dz1933028 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 <stdarg.h>
extern void abort(void);
int v1 = 8;
long int v2 = 3;
void *v3 = (void *)&v2;
struct A {
char c[16];
} v4 = {"foo"};
long double v5 = 40;
char seen[20];
int cnt;
__attribute__((noinline)) int foo1(int x, int y, ...) {
return x;
}
__attribute__((noinline)) int foo2(int x, int y, ...) {
return x + 8;
}
__attribute__((noinline)) int foo3(void) { return 6; }
extern inline __attribute__((always_inline, gnu_inline)) int bar(int x, ...) {
if (x < 10)
return foo1(x, foo3(), 5, __builtin_va_arg_pack());
return foo2(x, foo3() + 4, __builtin_va_arg_pack());
}
int main(void) {
if (bar(0, ++v1, v4, &v4, v2++) != 0)
abort();
if (bar(1, ++v5, 8, v3) != 1)
abort();
if (bar(2) != 2)
abort();
if (bar(v1 + 2) != 19)
abort();
if (bar(v1 + 3, v5--, v4, v4, v3, 16LL) != 20)
abort();
return 0;
}
$ gcc -O0 --coverage test.c;./a.out;gcov test;cat test.c.gcov
File 'test.c'
Lines executed:75.00% of 20
Creating 'test.c.gcov'
-: 0:Source:test.c
-: 0:Graph:test.gcno
-: 0:Data:test.gcda
-: 0:Runs:1
-: 1:#include <stdarg.h>
-: 2:
-: 3:extern void abort(void);
-: 4:
-: 5:int v1 = 8;
-: 6:long int v2 = 3;
-: 7:void *v3 = (void *)&v2;
-: 8:struct A {
-: 9: char c[16];
-: 10:} v4 = {"foo"};
-: 11:long double v5 = 40;
-: 12:char seen[20];
-: 13:int cnt;
-: 14:
3: 15:__attribute__((noinline)) int foo1(int x, int y, ...) {
3: 16: return x;
-: 17:}
-: 18:
2: 19:__attribute__((noinline)) int foo2(int x, int y, ...) {
2: 20: return x + 8;
-: 21:}
-: 22:
5: 23:__attribute__((noinline)) int foo3(void) { return 6; }
-: 24:
-: 25:extern inline __attribute__((always_inline, gnu_inline)) int
bar(int x, ...) {
1: 26: if (x < 10)
3*: 27: return foo1(x, foo3(), 5, __builtin_va_arg_pack());
2*: 28: return foo2(x, foo3() + 4, __builtin_va_arg_pack());
-: 29:}
-: 30:
1: 31:int main(void) {
2: 32: if (bar(0, ++v1, v4, &v4, v2++) != 0)
#####: 33: abort();
2: 34: if (bar(1, ++v5, 8, v3) != 1)
#####: 35: abort();
1: 36: if (bar(2) != 2)
#####: 37: abort();
2: 38: if (bar(v1 + 2) != 19)
#####: 39: abort();
2: 40: if (bar(v1 + 3, v5--, v4, v4, v3, 16LL) != 20)
#####: 41: abort();
1: 42: return 0;
-: 43:}
The coverage of line #32,#34,#38 and #40 should be 1 like line #36
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug gcov-profile/99440] [GCOV] Wrong coverage with callsite
2021-03-07 7:36 [Bug gcov-profile/99440] New: [GCOV] Wrong coverage with callsite dz1933028 at smail dot nju.edu.cn
@ 2021-03-08 9:10 ` marxin at gcc dot gnu.org
2021-08-06 11:39 ` njuwy at smail dot nju.edu.cn
1 sibling, 0 replies; 3+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-03-08 9:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99440
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2021-03-08
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug gcov-profile/99440] [GCOV] Wrong coverage with callsite
2021-03-07 7:36 [Bug gcov-profile/99440] New: [GCOV] Wrong coverage with callsite dz1933028 at smail dot nju.edu.cn
2021-03-08 9:10 ` [Bug gcov-profile/99440] " marxin at gcc dot gnu.org
@ 2021-08-06 11:39 ` njuwy at smail dot nju.edu.cn
1 sibling, 0 replies; 3+ messages in thread
From: njuwy at smail dot nju.edu.cn @ 2021-08-06 11:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99440
--- Comment #1 from Yang Wang <njuwy at smail dot nju.edu.cn> ---
And also line 26 should be executed 5 times
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-03-07 7:36 [Bug gcov-profile/99440] New: [GCOV] Wrong coverage with callsite dz1933028 at smail dot nju.edu.cn
2021-03-08 9:10 ` [Bug gcov-profile/99440] " marxin at gcc dot gnu.org
2021-08-06 11:39 ` njuwy at smail dot nju.edu.cn
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