| Issue |
150440
|
| Summary |
[coverage] support source-based static destructor coverage
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
justincady
|
It appears executed static destructors are not reported for code coverage:
```
// coverage.cc
#include <cstdio>
struct C {
C() {
printf("ctor called\n");
}
~C() {
printf("dtor called\n");
}
};
static C c;
int main() {
printf("main\n");
return 0;
}
```
```
# build-cxx.sh
/usr/bin/clang++ --version | /bin/grep "clang version"
/usr/bin/clang++ -fprofile-instr-generate -fcoverage-mapping coverage.cc -o coverage
./coverage
/usr/bin/llvm-profdata merge -sparse default.profraw -o default.profdata
/usr/bin/llvm-cov show ./coverage -instr-profile=""
```
```
$ ./build-cxx.sh coverage.cc
clang version 22.0.0
ctor called
main
dtor called
1| |#include <cstdio>
2| |
3| |struct C {
4| 1| C() {
5| 1| printf("ctor called\n");
6| 1| }
7| 0| ~C() {
8| 0| printf("dtor called\n");
9| 0| }
10| |};
11| |
12| |static C c;
13| |
14| 1|int main() {
15| 1| printf("main\n");
16| 1| return 0;
17| 1|}
```
I believe this is because `~C()` runs _after_ static destruction triggers coverage output to be written via `__llvm_profile_write_file` (checked with GDB).
It seems this was fixed for gcov (`--coverage`) years ago:
- https://github.com/llvm/llvm-project/issues/37750
- https://reviews.llvm.org/D82253
@MaskRay could we extend this fix to source-based code coverage?
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