archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-26 14:24:46 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8211446: Replace oop_pc_follow_contents with oop_iterate and closure

Browse source 
Reviewed-by: sjohanss, tschatzl
This commit is contained in:
Leo Korinth 2018-10-12 12:13:06 +02:00
parent 4bc903d17a
commit 78fe66c3bb
14 changed files with 94 additions and 173 deletions
Download patch file Download diff file Expand all files Collapse all files

43
src/hotspot/share/gc/parallel/psParallelCompact.cpp
View file

@ -846,18 +846,43 @@ PSParallelCompact::IsAliveClosure PSParallelCompact::_is_alive_closure;
bool PSParallelCompact::IsAliveClosure::do_object_b(oop p) { return mark_bitmap()->is_marked(p); }
class PCReferenceProcessor: public ReferenceProcessor {
public:
PCReferenceProcessor(
BoolObjectClosure* is_subject_to_discovery,
BoolObjectClosure* is_alive_non_header) :
ReferenceProcessor(is_subject_to_discovery,
ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
ParallelGCThreads, // mt processing degree
true, // mt discovery
ParallelGCThreads, // mt discovery degree
true, // atomic_discovery
is_alive_non_header) {
}
template<typename T> bool discover(oop obj, ReferenceType type) {
T* referent_addr = (T*) java_lang_ref_Reference::referent_addr_raw(obj);
T heap_oop = RawAccess<>::oop_load(referent_addr);
oop referent = CompressedOops::decode_not_null(heap_oop);
return PSParallelCompact::mark_bitmap()->is_unmarked(referent)
&& ReferenceProcessor::discover_reference(obj, type);
}
virtual bool discover_reference(oop obj, ReferenceType type) {
if (UseCompressedOops) {
return discover<narrowOop>(obj, type);
} else {
return discover<oop>(obj, type);
}
}
};
void PSParallelCompact::post_initialize() {
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
_span_based_discoverer.set_span(heap->reserved_region());
_ref_processor =
new ReferenceProcessor(&_span_based_discoverer,
ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
ParallelGCThreads, // mt processing degree
true, // mt discovery
ParallelGCThreads, // mt discovery degree
true, // atomic_discovery
&_is_alive_closure, // non-header is alive closure
false); // disable adjusting number of processing threads
new PCReferenceProcessor(&_span_based_discoverer,
&_is_alive_closure); // non-header is alive closure
_counters = new CollectorCounters("PSParallelCompact", 1);
// Initialize static fields in ParCompactionManager.
@ -2077,7 +2102,7 @@ void PSParallelCompact::marking_phase(ParCompactionManager* cm,
TaskQueueSetSuper* qset = ParCompactionManager::stack_array();
ParallelTaskTerminator terminator(active_gc_threads, qset);
ParCompactionManager::MarkAndPushClosure mark_and_push_closure(cm);
PCMarkAndPushClosure mark_and_push_closure(cm);
ParCompactionManager::FollowStackClosure follow_stack_closure(cm);
// Need new claim bits before marking starts.