| Issue |
171822
|
| Summary |
[Coverage] Line coverage contains invalid counts
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
sebastianzander
|
In our codebase, `llvm-cov export --format=lcov` produces some weird, unrealistic high line hit counts, especially considering the line counts surrounding them within the same region. Find an example of a slightly obfuscated function together with the LCOV output below:
```cpp
int DisplayIdManager::findNewDisplayID( const Framework &workingFw, const Framework &orderingFw,
const QString &businessKey, const QString &orderKey )
{ // line 330
Q_ASSERT( !parentBusinessKey.isEmpty() && !orderKey.isEmpty() );
// try to find in cache at first
int displayID = displayIdCache.maxDisplayId( orderKey, businessKey );
if ( displayID > 0 )
{
++displayID;
displayIdCache.setMaxDisplayId( orderKey, businessKey, displayID );
return displayID;
}
int workingVersionID = getVersionIdByType( workingFw, versionTypes_c::WORKING ); // line 342
int orderingVersionID = getVersionIdByType( orderingFw, versionTypes_c::ORDERING );
// unrelated comment
const auto &foo = idl_n::fetch< someList_c >( workingFw );
...
```
```lcov
SF:/opt/.../display_id_mgr.cpp
...
DA:330,77568
DA:331,77568
DA:334,77568
DA:335,77568
DA:336,78033
DA:337,78033
DA:338,78033
DA:339,78033
DA:340,78033
DA:342,18446744073709551151
DA:343,18446744073709551151
DA:346,18446744073709551151
DA:348,18446744073709551151
DA:349,2
DA:350,2
...
```
It is weird, because these lines are unconditionally executed and the count of lines before and after seems normal.
LLVM version: 16.0.2
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