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8200429: Adjust object pinning interface on CollectedHeap

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Reviewed-by: dholmes, rkennke
This commit is contained in:
Per Lidén 2018-04-04 11:59:47 +02:00
parent 29bb7c8a05
commit 15263a27f8
3 changed files with 38 additions and 21 deletions
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14
src/hotspot/share/gc/shared/collectedHeap.hpp
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@ -589,14 +589,12 @@ class CollectedHeap : public CHeapObj<mtInternal> {
// perform cleanup tasks serially in the VMThread.
virtual WorkGang* get_safepoint_workers() { return NULL; }
// Support for object pinning. This is used by JNI's Get*Critical() and
// Release*Critical() family of functions. A GC may either use the GCLocker
// protocol to ensure no critical arrays are in-use when entering
// a GC pause, or it can implement pinning, which must guarantee that
// the object does not move while pinned.
virtual oop pin_object(JavaThread* thread, oop o);
virtual void unpin_object(JavaThread* thread, oop o);
// Support for object pinning. This is used by JNI Get*Critical()
// and Release*Critical() family of functions. If supported, the GC
// must guarantee that pinned objects never move.
virtual bool supports_object_pinning() const;
virtual oop pin_object(JavaThread* thread, oop obj);
virtual void unpin_object(JavaThread* thread, oop obj);
// Non product verification and debugging.
#ifndef PRODUCT