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8246676: monitor list lock operations need more fencing

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Reviewed-by: dholmes, eosterlund, rehn, pchilanomate
This commit is contained in:
Daniel D. Daugherty 2020-07-15 17:01:38 -04:00
parent 62d77dc3fc
commit f636b84f48
3 changed files with 72 additions and 14 deletions
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5
src/hotspot/share/runtime/objectMonitor.hpp
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@ -278,9 +278,14 @@ class ObjectMonitor {
// _owner field. Returns the prior value of the _owner field.
void* try_set_owner_from(void* old_value, void* new_value);
// Simply get _next_om field.
ObjectMonitor* next_om() const;
// Get _next_om field with acquire semantics.
ObjectMonitor* next_om_acquire() const;
// Simply set _next_om field to new_value.
void set_next_om(ObjectMonitor* new_value);
// Set _next_om field to new_value with release semantics.
void release_set_next_om(ObjectMonitor* new_value);
// Try to set _next_om field to new_value if the current value matches
// old_value, using Atomic::cmpxchg(). Otherwise, does not change the
// _next_om field. Returns the prior value of the _next_om field.