https://bugs.llvm.org/show_bug.cgi?id=49438
Bug ID: 49438
Summary: [LLVM-COV] Wrong coverage with "abort" function
Product: Runtime Libraries
Version: 11.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: libprofile library
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
$ clang -v
clang version 11.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/wangyang/llvm-project/build/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
$ cat test.c
extern void abort(void);
#define f(x) x
int main() {
#if f(1) == f /**/ (/**/ 1 /**/)
int x;
#endif
x = 0;
while(x<2){
if (f
/**/ (
/**/ 0 /**/
/**/))
abort();
x++;
}
return 0;
}
$ clang -w -O0 -g -fcoverage-mapping -fprofile-instr-generate=test.profraw
test.c; ./a.out; llvm-profdata merge test.profraw -o test.profdata; llvm-cov
show a.out -instr-profile=test.profdata test.c > test.lcov; cat test.lcov
1| |extern void abort(void);
2| |
3| 4|#define f(x) x
4| |
5| 1|int main() {
6| 1|#if f(1) == f /**/ (/**/ 1 /**/)
7| 1| int x;
8| 1|#endif
9| 1| x = 0;
10| 3| while(x<2){
11| 2| if (f
12| 2| /**/ (
13| 2| /**/ 0 /**/
14| 2| /**/))
15| 2| abort();
16| 2| x++;
17| 2|}
18| 1| return 0;
19| 1|}
Line #15 should not be executed
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