8280784: VM_Cleanup unnecessarily processes all thread oops

Reviewed-by: eosterlund, shade
openjdk · Jan 28, 2022 · 8a3cca0 · 8a3cca0 · openjdk-notifier · Jan 28, 2022
1 parent 973dda5
commit 8a3cca0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/hotspot/share/runtime/vmOperations.hpp b/src/hotspot/share/runtime/vmOperations.hpp
@@ -45,6 +45,10 @@ class VM_Cleanup: public VM_Operation {
  public:
   VMOp_Type type() const { return VMOp_Cleanup; }
   void doit() {};
+  virtual bool skip_thread_oop_barriers() const {
+    // None of the safepoint cleanup tasks read oops in the Java threads.
+    return true;
+  }
 };
 
 class VM_ClearICs: public VM_Operation {