--- a/hotspot/src/share/vm/gc_implementation/shared/mutableSpace.cpp Fri Jun 27 19:12:11 2008 -0700
+++ b/hotspot/src/share/vm/gc_implementation/shared/mutableSpace.cpp Wed Jul 09 15:08:55 2008 -0700
@@ -25,7 +25,17 @@
# include "incls/_precompiled.incl"
# include "incls/_mutableSpace.cpp.incl"
-void MutableSpace::initialize(MemRegion mr, bool clear_space) {
+MutableSpace::MutableSpace(): ImmutableSpace(), _top(NULL) {
+ _mangler = new MutableSpaceMangler(this);
+}
+
+MutableSpace::~MutableSpace() {
+ delete _mangler;
+}
+
+void MutableSpace::initialize(MemRegion mr,
+ bool clear_space,
+ bool mangle_space) {
HeapWord* bottom = mr.start();
HeapWord* end = mr.end();
@@ -34,14 +44,51 @@
set_bottom(bottom);
set_end(end);
- if (clear_space) clear();
+ if (clear_space) {
+ clear(mangle_space);
+ }
+}
+
+void MutableSpace::clear(bool mangle_space) {
+ set_top(bottom());
+ if (ZapUnusedHeapArea && mangle_space) {
+ mangle_unused_area();
+ }
+}
+
+#ifndef PRODUCT
+void MutableSpace::check_mangled_unused_area(HeapWord* limit) {
+ mangler()->check_mangled_unused_area(limit);
+}
+
+void MutableSpace::check_mangled_unused_area_complete() {
+ mangler()->check_mangled_unused_area_complete();
}
-void MutableSpace::clear() {
- set_top(bottom());
- if (ZapUnusedHeapArea) mangle_unused_area();
+// Mangle only the unused space that has not previously
+// been mangled and that has not been allocated since being
+// mangled.
+void MutableSpace::mangle_unused_area() {
+ mangler()->mangle_unused_area();
+}
+
+void MutableSpace::mangle_unused_area_complete() {
+ mangler()->mangle_unused_area_complete();
}
+void MutableSpace::mangle_region(MemRegion mr) {
+ SpaceMangler::mangle_region(mr);
+}
+
+void MutableSpace::set_top_for_allocations(HeapWord* v) {
+ mangler()->set_top_for_allocations(v);
+}
+
+void MutableSpace::set_top_for_allocations() {
+ mangler()->set_top_for_allocations(top());
+}
+#endif
+
// This version requires locking. */
HeapWord* MutableSpace::allocate(size_t size) {
assert(Heap_lock->owned_by_self() ||