https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99485
Bug ID: 99485
Summary: [GCOV] When the function pointer is used as a
parameter, the coverage information is wrong
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<stdio.h>
void free(void *ptr) {
printf("passed\n");
}
void *foo(void) {
printf("return\n");
return 0;
}
int main(void) {
void *p = foo();
free(p);
return 0;
}
$ gcc -O0 --coverage test.c;./a.out;gcov test;cat test.c.gcov
return
passed
passed
passed
passed
passed
File 'test.c'
Lines executed:100.00% of 10
Creating 'test.c.gcov'
-: 0:Source:test.c
-: 0:Graph:test.gcno
-: 0:Data:test.gcda
-: 0:Runs:1
-: 1:#include<stdio.h>
2: 2:void free(void *ptr) {
2: 3:printf("passed\n");
2: 4:}
-: 5:
1: 6:void *foo(void) {
1: 7:printf("return\n");
1: 8:return 0;
-: 9:}
-: 10:
1: 11:int main(void) {
1: 12: void *p = foo();
1: 13: free(p);
1: 14: return 0;
-: 15:}
The result shows that function "free" was executed 5 times.
