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4957990: Perm heap bloat in JVM

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Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.

Reviewed-by: jcoomes, jmasa, kvn, never
This commit is contained in:
Y. Srinivas Ramakrishna 2009-09-02 00:04:29 -07:00
parent 2491751525
commit c6763b5bad
27 changed files with 385 additions and 65 deletions
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26
hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp
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@ -155,6 +155,12 @@ class PushAndMarkClosure: public KlassRememberingOopClosure {
Prefetch::style prefetch_style() {
return Prefetch::do_read;
}
// In support of class unloading
virtual const bool should_remember_mdo() const {
return false;
// return _should_remember_klasses;
}
virtual void remember_mdo(DataLayout* v);
};
// In the parallel case, the revisit stack, the bit map and the
@ -185,6 +191,12 @@ class Par_PushAndMarkClosure: public Par_KlassRememberingOopClosure {
Prefetch::style prefetch_style() {
return Prefetch::do_read;
}
// In support of class unloading
virtual const bool should_remember_mdo() const {
return false;
// return _should_remember_klasses;
}
virtual void remember_mdo(DataLayout* v);
};
// The non-parallel version (the parallel version appears further below).
@ -303,6 +315,13 @@ class PushOrMarkClosure: public KlassRememberingOopClosure {
virtual void do_oop(narrowOop* p);
inline void do_oop_nv(oop* p) { PushOrMarkClosure::do_oop_work(p); }
inline void do_oop_nv(narrowOop* p) { PushOrMarkClosure::do_oop_work(p); }
// In support of class unloading
virtual const bool should_remember_mdo() const {
return false;
// return _should_remember_klasses;
}
virtual void remember_mdo(DataLayout* v);
// Deal with a stack overflow condition
void handle_stack_overflow(HeapWord* lost);
private:
@ -340,6 +359,13 @@ class Par_PushOrMarkClosure: public Par_KlassRememberingOopClosure {
virtual void do_oop(narrowOop* p);
inline void do_oop_nv(oop* p) { Par_PushOrMarkClosure::do_oop_work(p); }
inline void do_oop_nv(narrowOop* p) { Par_PushOrMarkClosure::do_oop_work(p); }
// In support of class unloading
virtual const bool should_remember_mdo() const {
return false;
// return _should_remember_klasses;
}
virtual void remember_mdo(DataLayout* v);
// Deal with a stack overflow condition
void handle_stack_overflow(HeapWord* lost);
private: