8294580: frame::interpreter_frame_print_on() crashes if free BasicObj…

…ectLock exists in frame Reviewed-by: mdoerr Backport-of: bdb4ed0fb136e9e5391cfa520048de6b7f83067d
openjdk · Dec 15, 2022 · 3f66b16 · 3f66b16 · openjdk-notifier · Dec 15, 2022
1 parent 01f5a19
commit 3f66b16
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/hotspot/share/runtime/frame.cpp b/src/hotspot/share/runtime/frame.cpp
@@ -579,8 +579,8 @@ void frame::interpreter_frame_print_on(outputStream* st) const {
   for (BasicObjectLock* current = interpreter_frame_monitor_end();
        current < interpreter_frame_monitor_begin();
        current = next_monitor_in_interpreter_frame(current)) {
-    st->print(" - obj    [");
-    current->obj()->print_value_on(st);
+    st->print(" - obj    [%s", current->obj() == NULL ? "null" : "");
+    if (current->obj() != NULL) current->obj()->print_value_on(st);
     st->print_cr("]");
     st->print(" - lock   [");
     current->lock()->print_on(st);