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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv

Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
This commit is contained in:
Coleen Phillimore 2008-04-13 17:43:42 -04:00
parent 680ecf1611
commit 4a831d45f0
273 changed files with 6585 additions and 2993 deletions
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21
hotspot/src/share/vm/memory/compactingPermGenGen.cpp
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@ -49,9 +49,9 @@ public:
// to prevent visiting any object twice.
class RecursiveAdjustSharedObjectClosure : public OopClosure {
public:
void do_oop(oop* o) {
oop obj = *o;
protected:
template <class T> inline void do_oop_work(T* p) {
oop obj = oopDesc::load_decode_heap_oop_not_null(p);
if (obj->is_shared_readwrite()) {
if (obj->mark()->is_marked()) {
obj->init_mark(); // Don't revisit this object.
@ -71,7 +71,10 @@ public:
}
}
}
};
}
public:
virtual void do_oop(oop* p) { RecursiveAdjustSharedObjectClosure::do_oop_work(p); }
virtual void do_oop(narrowOop* p) { RecursiveAdjustSharedObjectClosure::do_oop_work(p); }
};
@ -86,9 +89,9 @@ public:
// as doing so can cause hash codes to be computed, destroying
// forwarding pointers.
class TraversePlaceholdersClosure : public OopClosure {
public:
void do_oop(oop* o) {
oop obj = *o;
protected:
template <class T> inline void do_oop_work(T* p) {
oop obj = oopDesc::load_decode_heap_oop_not_null(p);
if (obj->klass() == Universe::symbolKlassObj() &&
obj->is_shared_readonly()) {
symbolHandle sym((symbolOop) obj);
@ -99,6 +102,10 @@ class TraversePlaceholdersClosure : public OopClosure {
}
}
}
public:
virtual void do_oop(oop* p) { TraversePlaceholdersClosure::do_oop_work(p); }
virtual void do_oop(narrowOop* p) { TraversePlaceholdersClosure::do_oop_work(p); }
};