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8247280: more fencing needed in async deflation for non-TSO machines

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Reviewed-by: dholmes, pchilanomate
This commit is contained in:
Daniel D. Daugherty 2020-07-15 16:59:39 -04:00
parent d7c1bb1fb7
commit 62d77dc3fc
3 changed files with 19 additions and 2 deletions
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6
src/hotspot/share/runtime/objectMonitor.hpp
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@ -27,6 +27,7 @@
#include "memory/allocation.hpp"
#include "memory/padded.hpp"
#include "metaprogramming/isRegisteredEnum.hpp"
#include "oops/markWord.hpp"
#include "runtime/os.hpp"
#include "runtime/park.hpp"
@ -330,8 +331,10 @@ class ObjectMonitor {
void* object() const;
void* object_addr();
void set_object(void* obj);
void release_set_allocation_state(AllocationState s);
void set_allocation_state(AllocationState s);
AllocationState allocation_state() const;
AllocationState allocation_state_acquire() const;
bool is_free() const;
bool is_old() const;
bool is_new() const;
@ -374,6 +377,9 @@ class ObjectMonitor {
void install_displaced_markword_in_object(const oop obj);
};
// Register for atomic operations.
template<> struct IsRegisteredEnum<ObjectMonitor::AllocationState> : public TrueType {};
// Macro to use guarantee() for more strict AsyncDeflateIdleMonitors
// checks and assert() otherwise.
#define ADIM_guarantee(p, ...) \