8273486: Zero: Handle DiagnoseSyncOnValueBasedClasses VM option

Reviewed-by: dholmes
openjdk · Sep 14, 2021 · 86a8e5524ddb5e25dab54b4f56cc1b9c27d0a4a6 · 86a8e55 · openjdk-notifier · Sep 14, 2021
1 parent 8d73ee6
commit 86a8e5524ddb5e25dab54b4f56cc1b9c27d0a4a6
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/hotspot/cpu/zero/vm_version_zero.cpp b/src/hotspot/cpu/zero/vm_version_zero.cpp
@@ -45,6 +45,11 @@ void VM_Version::initialize() {
   }
   FLAG_SET_DEFAULT(AllocatePrefetchDistance, 0);
 
+  // If lock diagnostics is needed, always call to runtime
+  if (DiagnoseSyncOnValueBasedClasses != 0) {
+    FLAG_SET_DEFAULT(UseHeavyMonitors, true);
+  }
+
   // Not implemented
   UNSUPPORTED_OPTION(CriticalJNINatives);
 }