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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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9
hotspot/src/share/vm/memory/universe.hpp
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@ -180,10 +180,13 @@ class Universe: AllStatic {
// The particular choice of collected heap.
static CollectedHeap* _collectedHeap;
// Base address for oop-within-java-object materialization.
// NULL if using wide oops. Doubles as heap oop null value.
static address _heap_base;
// array of dummy objects used with +FullGCAlot
debug_only(static objArrayOop _fullgc_alot_dummy_array;)
// index of next entry to clear
// index of next entry to clear
debug_only(static int _fullgc_alot_dummy_next;)
// Compiler/dispatch support
@ -323,6 +326,10 @@ class Universe: AllStatic {
// The particular choice of collected heap.
static CollectedHeap* heap() { return _collectedHeap; }
// For UseCompressedOops
static address heap_base() { return _heap_base; }
static address* heap_base_addr() { return &_heap_base; }
// Historic gc information
static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; }
static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; }