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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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69
hotspot/src/share/vm/memory/genOopClosures.inline.hpp
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@ -38,10 +38,10 @@ inline void OopsInGenClosure::set_generation(Generation* gen) {
}
}
inline void OopsInGenClosure::do_barrier(oop* p) {
template <class T> inline void OopsInGenClosure::do_barrier(T* p) {
assert(generation()->is_in_reserved(p), "expected ref in generation");
oop obj = *p;
assert(obj != NULL, "expected non-null object");
assert(!oopDesc::is_null(*p), "expected non-null object");
oop obj = oopDesc::load_decode_heap_oop_not_null(p);
// If p points to a younger generation, mark the card.
if ((HeapWord*)obj < _gen_boundary) {
_rs->inline_write_ref_field_gc(p, obj);
@ -49,18 +49,17 @@ inline void OopsInGenClosure::do_barrier(oop* p) {
}
// NOTE! Any changes made here should also be made
// in FastScanClosure::do_oop();
inline void ScanClosure::do_oop(oop* p) {
oop obj = *p;
// in FastScanClosure::do_oop_work()
template <class T> inline void ScanClosure::do_oop_work(T* p) {
T heap_oop = oopDesc::load_heap_oop(p);
// Should we copy the obj?
if (obj != NULL) {
if (!oopDesc::is_null(heap_oop)) {
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
if ((HeapWord*)obj < _boundary) {
assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
if (obj->is_forwarded()) {
*p = obj->forwardee();
} else {
*p = _g->copy_to_survivor_space(obj, p);
}
oop new_obj = obj->is_forwarded() ? obj->forwardee()
: _g->copy_to_survivor_space(obj);
oopDesc::encode_store_heap_oop_not_null(p, new_obj);
}
if (_gc_barrier) {
// Now call parent closure
@ -69,23 +68,21 @@ inline void ScanClosure::do_oop(oop* p) {
}
}
inline void ScanClosure::do_oop_nv(oop* p) {
ScanClosure::do_oop(p);
}
inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); }
inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); }
// NOTE! Any changes made here should also be made
// in ScanClosure::do_oop();
inline void FastScanClosure::do_oop(oop* p) {
oop obj = *p;
// in ScanClosure::do_oop_work()
template <class T> inline void FastScanClosure::do_oop_work(T* p) {
T heap_oop = oopDesc::load_heap_oop(p);
// Should we copy the obj?
if (obj != NULL) {
if (!oopDesc::is_null(heap_oop)) {
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
if ((HeapWord*)obj < _boundary) {
assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
if (obj->is_forwarded()) {
*p = obj->forwardee();
} else {
*p = _g->copy_to_survivor_space(obj, p);
}
oop new_obj = obj->is_forwarded() ? obj->forwardee()
: _g->copy_to_survivor_space(obj);
oopDesc::encode_store_heap_oop_not_null(p, new_obj);
if (_gc_barrier) {
// Now call parent closure
do_barrier(p);
@ -94,26 +91,22 @@ inline void FastScanClosure::do_oop(oop* p) {
}
}
inline void FastScanClosure::do_oop_nv(oop* p) {
FastScanClosure::do_oop(p);
}
inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); }
inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); }
// Note similarity to ScanClosure; the difference is that
// the barrier set is taken care of outside this closure.
inline void ScanWeakRefClosure::do_oop(oop* p) {
oop obj = *p;
assert (obj != NULL, "null weak reference?");
template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) {
assert(!oopDesc::is_null(*p), "null weak reference?");
oop obj = oopDesc::load_decode_heap_oop_not_null(p);
// weak references are sometimes scanned twice; must check
// that to-space doesn't already contain this object
if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) {
if (obj->is_forwarded()) {
*p = obj->forwardee();
} else {
*p = _g->copy_to_survivor_space(obj, p);
}
oop new_obj = obj->is_forwarded() ? obj->forwardee()
: _g->copy_to_survivor_space(obj);
oopDesc::encode_store_heap_oop_not_null(p, new_obj);
}
}
inline void ScanWeakRefClosure::do_oop_nv(oop* p) {
ScanWeakRefClosure::do_oop(p);
}
inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); }
inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); }