Cache PerBuildSyscallCache if concurrency level is unchanged.

--
MOS_MIGRATED_REVID=138893829

1 files changed, 5 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/PerBuildSyscallCache.java b/src/main/java/com/google/devtools/build/lib/skyframe/PerBuildSyscallCache.java
index ebb0618ae9..646d6093dd 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/PerBuildSyscallCache.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/PerBuildSyscallCache.java
@@ -22,7 +22,6 @@ import com.google.devtools.build.lib.vfs.FileStatus;
 import com.google.devtools.build.lib.vfs.Path;
 import com.google.devtools.build.lib.vfs.Symlinks;
 import com.google.devtools.build.lib.vfs.UnixGlob;
-
 import java.io.IOException;
 import java.util.Collection;
 
@@ -110,6 +109,11 @@ public class PerBuildSyscallCache implements UnixGlob.FilesystemCalls {
     return (status == NO_STATUS) ? null : status;
   }
 
+  public void clear() {
+    statCache.invalidateAll();
+    readdirCache.invalidateAll();
+  }
+
   // This is used because the cache implementations don't allow null.
   private static final class FakeFileStatus implements FileStatus {
     @Override