archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-17 01:24:33 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

7085906: Replace the permgen allocated sentinelRef with a self-looped end

Browse source 
Remove the sentinelRef and let the last Reference in a discovered chain point back to itself.

Reviewed-by: ysr, jmasa
This commit is contained in:
Stefan Karlsson 2011-09-01 16:18:17 +02:00
parent a9cd50a1c8
commit 5b6ba4e611
11 changed files with 96 additions and 103 deletions
Download patch file Download diff file Expand all files Collapse all files

10
hotspot/src/share/vm/memory/referenceProcessor.hpp
View file

@ -52,8 +52,6 @@ class DiscoveredList;
class ReferenceProcessor : public CHeapObj {
protected:
// End of list marker
static oop _sentinelRef;
MemRegion _span; // (right-open) interval of heap
// subject to wkref discovery
bool _discovering_refs; // true when discovery enabled
@ -106,8 +104,6 @@ class ReferenceProcessor : public CHeapObj {
int max_num_q() { return _max_num_q; }
void set_active_mt_degree(int v) { _num_q = v; }
DiscoveredList* discovered_soft_refs() { return _discoveredSoftRefs; }
static oop sentinel_ref() { return _sentinelRef; }
static oop* adr_sentinel_ref() { return &_sentinelRef; }
ReferencePolicy* setup_policy(bool always_clear) {
_current_soft_ref_policy = always_clear ?
_always_clear_soft_ref_policy : _default_soft_ref_policy;
@ -230,6 +226,7 @@ class ReferenceProcessor : public CHeapObj {
HeapWord* discovered_addr);
void verify_ok_to_handle_reflists() PRODUCT_RETURN;
void clear_discovered_references(DiscoveredList& refs_list);
void abandon_partial_discovered_list(DiscoveredList& refs_list);
// Calculate the number of jni handles.
@ -314,7 +311,6 @@ class ReferenceProcessor : public CHeapObj {
// iterate over oops
void weak_oops_do(OopClosure* f); // weak roots
static void oops_do(OopClosure* f); // strong root(s)
// Balance each of the discovered lists.
void balance_all_queues();
@ -340,7 +336,6 @@ class ReferenceProcessor : public CHeapObj {
// debugging
void verify_no_references_recorded() PRODUCT_RETURN;
void verify_referent(oop obj) PRODUCT_RETURN;
static void verify();
// clear the discovered lists (unlinking each entry).
void clear_discovered_references() PRODUCT_RETURN;
@ -524,12 +519,10 @@ protected:
EnqueueTask(ReferenceProcessor& ref_processor,
DiscoveredList refs_lists[],
HeapWord* pending_list_addr,
oop sentinel_ref,
int n_queues)
: _ref_processor(ref_processor),
_refs_lists(refs_lists),
_pending_list_addr(pending_list_addr),
_sentinel_ref(sentinel_ref),
_n_queues(n_queues)
{ }
@ -540,7 +533,6 @@ protected:
ReferenceProcessor& _ref_processor;
DiscoveredList* _refs_lists;
HeapWord* _pending_list_addr;
oop _sentinel_ref;
int _n_queues;
};