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src/hotspot/share/gc/epsilon/epsilonHeap.hpp
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rev 53444 : Epsilon + Mark-Compact
@@ -23,10 +23,11 @@
#ifndef SHARE_GC_EPSILON_EPSILONHEAP_HPP
#define SHARE_GC_EPSILON_EPSILONHEAP_HPP
#include "gc/shared/collectedHeap.hpp"
+#include "gc/shared/markBitMap.hpp"
#include "gc/shared/softRefPolicy.hpp"
#include "gc/shared/space.hpp"
#include "services/memoryManager.hpp"
#include "gc/epsilon/epsilonCollectorPolicy.hpp"
#include "gc/epsilon/epsilonMonitoringSupport.hpp"
@@ -47,10 +48,11 @@
size_t _step_counter_update;
size_t _step_heap_print;
int64_t _decay_time_ns;
volatile size_t _last_counter_update;
volatile size_t _last_heap_print;
+ MarkBitMap _bitmap;
public:
static EpsilonHeap* heap();
EpsilonHeap(EpsilonCollectorPolicy* p) :
@@ -88,20 +90,22 @@
return _space->is_in(p);
}
virtual bool is_scavengable(oop obj) {
// No GC is going to happen, therefore no objects ever move.
- return false;
+ // Or are they... (evil laugh).
+ return EpsilonWhyNotGCAnyway;
}
virtual bool is_maximal_no_gc() const {
// No GC is going to happen. Return "we are at max", when we are about to fail.
return used() == capacity();
}
// Allocation
HeapWord* allocate_work(size_t size);
+ HeapWord* allocate_or_collect_work(size_t size);
virtual HeapWord* mem_allocate(size_t size, bool* gc_overhead_limit_was_exceeded);
virtual HeapWord* allocate_new_tlab(size_t min_size,
size_t requested_size,
size_t* actual_size);
@@ -120,11 +124,12 @@
virtual void object_iterate(ObjectClosure* cl) {
safe_object_iterate(cl);
}
// Object pinning support: every object is implicitly pinned
- virtual bool supports_object_pinning() const { return true; }
+ // Or is it... (evil laugh)
+ virtual bool supports_object_pinning() const { return !EpsilonWhyNotGCAnyway; }
virtual oop pin_object(JavaThread* thread, oop obj) { return obj; }
virtual void unpin_object(JavaThread* thread, oop obj) { }
// No support for block parsing.
virtual HeapWord* block_start(const void* addr) const { return NULL; }
@@ -145,12 +150,19 @@
}
virtual void print_on(outputStream* st) const;
virtual void print_tracing_info() const;
+ void entry_collect(GCCause::Cause cause);
+
private:
void print_heap_info(size_t used) const;
void print_metaspace_info() const;
+ void vmentry_collect(GCCause::Cause cause);
+
+ void process_all_roots(OopClosure* cl);
+ void walk_bitmap(ObjectClosure* cl);
+
};
#endif // SHARE_GC_EPSILON_EPSILONHEAP_HPP
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