================
@@ -108,6 +108,32 @@ DependencyScanningFilesystemSharedCache::getShardForUID(
return CacheShards[Hash % NumShards];
}
+void DependencyScanningFilesystemSharedCache::diagnoseNegativeStatCachedPaths(
+ llvm::raw_ostream &OS, llvm::vfs::FileSystem &UnderlyingFS) const {
+ // Iterate through all shards and look for cached stat errors.
+ for (unsigned i = 0; i < NumShards; i++) {
+ const CacheShard &Shard = CacheShards[i];
+ for (const auto &Path : Shard.CacheByFilename.keys()) {
+ auto CachedPairIt = Shard.CacheByFilename.find(Path);
+ auto CachedPair = CachedPairIt->getValue();
+ const CachedFileSystemEntry *Entry = CachedPair.first;
+
+ if (Entry->getError()) {
+ // Only examine cached errors.
+ llvm::ErrorOr<llvm::vfs::Status> Stat = UnderlyingFS.status(Path);
+ if (Stat) {
+ // This is the case where we have negatively cached the non-existence
+ // of the file at Path, but the cache is later invalidated. Report
+ // diagnostics.
----------------
jansvoboda11 wrote:
```suggestion
// This is the case where we have negatively the non-existence of the
// path, but it's later created without invalidating the cache. Report
// diagnostics.
```
https://github.com/llvm/llvm-project/pull/135703
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