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| -rw-r--r-- | runtime/monitor.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/runtime/monitor.h b/runtime/monitor.h index c459278..0b80892 100644 --- a/runtime/monitor.h +++ b/runtime/monitor.h @@ -231,6 +231,10 @@ class MonitorList { EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_); private: + // During sweeping we may free an object and on a separate thread have an object created using + // the newly freed memory. That object may then have its lock-word inflated and a monitor created. + // If we allow new monitor registration during sweeping this monitor may be incorrectly freed as + // the object wasn't marked when sweeping began. bool allow_new_monitors_ GUARDED_BY(monitor_list_lock_); Mutex monitor_list_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; ConditionVariable monitor_add_condition_ GUARDED_BY(monitor_list_lock_); |