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6423256: GC stacks should use a better data structure

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6942771: SEGV in ParScanThreadState::take_from_overflow_stack

Reviewed-by: apetrusenko, ysr, pbk
This commit is contained in:
John Coomes 2010-09-28 15:56:15 -07:00
parent aff36499e7
commit 1cdd538ea5
30 changed files with 718 additions and 402 deletions
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20
hotspot/src/share/vm/memory/defNewGeneration.hpp
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@ -77,10 +77,10 @@ protected:
// word being overwritten with a self-forwarding-pointer.
void preserve_mark_if_necessary(oop obj, markOop m);
// When one is non-null, so is the other. Together, they each pair is
// an object with a preserved mark, and its mark value.
GrowableArray<oop>* _objs_with_preserved_marks;
GrowableArray<markOop>* _preserved_marks_of_objs;
// Together, these keep <object with a preserved mark, mark value> pairs.
// They should always contain the same number of elements.
Stack<oop> _objs_with_preserved_marks;
Stack<markOop> _preserved_marks_of_objs;
// Returns true if the collection can be safely attempted.
// If this method returns false, a collection is not
@ -94,11 +94,7 @@ protected:
_promo_failure_scan_stack_closure = scan_stack_closure;
}
GrowableArray<oop>* _promo_failure_scan_stack;
GrowableArray<oop>* promo_failure_scan_stack() const {
return _promo_failure_scan_stack;
}
void push_on_promo_failure_scan_stack(oop);
Stack<oop> _promo_failure_scan_stack;
void drain_promo_failure_scan_stack(void);
bool _promo_failure_drain_in_progress;
@ -184,8 +180,6 @@ protected:
void do_void();
};
class FastEvacuateFollowersClosure;
friend class FastEvacuateFollowersClosure;
class FastEvacuateFollowersClosure: public VoidClosure {
GenCollectedHeap* _gch;
int _level;
@ -336,6 +330,10 @@ protected:
void verify(bool allow_dirty);
bool promo_failure_scan_is_complete() const {
return _promo_failure_scan_stack.is_empty();
}
protected:
// If clear_space is true, clear the survivor spaces. Eden is
// cleared if the minimum size of eden is 0. If mangle_space