Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/memory/gcLocker.hpp
src/share/vm/memory/gcLocker.hpp
- changeset 9806
- 758c07667682
- parent 6876
- 710a3c8b516e
- parent 9787
- 9f28a4cac6d9
equal
deleted
inserted
replaced
| 9762:c97db0855565 | 9806:758c07667682 |
|---|---|
| 24 | 24 |
| 25 #ifndef SHARE_VM_MEMORY_GCLOCKER_HPP | 25 #ifndef SHARE_VM_MEMORY_GCLOCKER_HPP |
| 26 #define SHARE_VM_MEMORY_GCLOCKER_HPP | 26 #define SHARE_VM_MEMORY_GCLOCKER_HPP |
| 27 | 27 |
| 28 #include "gc_interface/collectedHeap.hpp" | 28 #include "gc_interface/collectedHeap.hpp" |
| 29 #include "gc_interface/gcCause.hpp" | |
| 29 #include "memory/genCollectedHeap.hpp" | 30 #include "memory/genCollectedHeap.hpp" |
| 30 #include "memory/universe.hpp" | 31 #include "memory/universe.hpp" |
| 31 #include "oops/oop.hpp" | 32 #include "oops/oop.hpp" |
| 32 #include "runtime/thread.inline.hpp" | 33 #include "runtime/thread.inline.hpp" |
| 33 #ifdef TARGET_OS_FAMILY_linux | 34 #ifdef TARGET_OS_FAMILY_linux |
| 55 // unlocking. | 56 // unlocking. |
| 56 static volatile jint _jni_lock_count; // number of jni active instances. | 57 static volatile jint _jni_lock_count; // number of jni active instances. |
| 57 static volatile bool _needs_gc; // heap is filling, we need a GC | 58 static volatile bool _needs_gc; // heap is filling, we need a GC |
| 58 // note: bool is typedef'd as jint | 59 // note: bool is typedef'd as jint |
| 59 static volatile bool _doing_gc; // unlock_critical() is doing a GC | 60 static volatile bool _doing_gc; // unlock_critical() is doing a GC |
| 61 static uint _total_collections; // value for _gc_locker collection | |
| 60 | 62 |
| 61 #ifdef ASSERT | 63 #ifdef ASSERT |
| 62 // This lock count is updated for all operations and is used to | 64 // This lock count is updated for all operations and is used to |
| 63 // validate the jni_lock_count that is computed during safepoints. | 65 // validate the jni_lock_count that is computed during safepoints. |
| 64 static volatile jint _debug_jni_lock_count; | 66 static volatile jint _debug_jni_lock_count; |
| 113 verify_critical_count(); | 115 verify_critical_count(); |
| 114 } | 116 } |
| 115 | 117 |
| 116 // Sets _needs_gc if is_active() is true. Returns is_active(). | 118 // Sets _needs_gc if is_active() is true. Returns is_active(). |
| 117 static bool check_active_before_gc(); | 119 static bool check_active_before_gc(); |
| 120 | |
| 121 // Return true if the designated collection is a GCLocker request | |
| 122 // that should be discarded. Returns true if cause == GCCause::_gc_locker | |
| 123 // and the given total collection value indicates a collection has been | |
| 124 // done since the GCLocker request was made. | |
| 125 static bool should_discard(GCCause::Cause cause, uint total_collections); | |
| 118 | 126 |
| 119 // Stalls the caller (who should not be in a jni critical section) | 127 // Stalls the caller (who should not be in a jni critical section) |
| 120 // until needs_gc() clears. Note however that needs_gc() may be | 128 // until needs_gc() clears. Note however that needs_gc() may be |
| 121 // set at a subsequent safepoint and/or cleared under the | 129 // set at a subsequent safepoint and/or cleared under the |
| 122 // JNICritical_lock, so the caller may not safely assert upon | 130 // JNICritical_lock, so the caller may not safely assert upon |
