src/share/vm/memory/universe.cpp
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*** old/src/share/vm/memory/universe.cpp Wed Sep 16 15:18:44 2015
--- new/src/share/vm/memory/universe.cpp Wed Sep 16 15:18:44 2015
*** 141,150 ****
--- 141,154 ----
debug_only(int Universe::_fullgc_alot_dummy_next = 0;)
// Heap
int Universe::_verify_count = 0;
+ // Oop verification (see MacroAssembler::verify_oop)
+ uintptr_t Universe::_verify_oop_mask = 0;
+ uintptr_t Universe::_verify_oop_bits = (uintptr_t) -1;
+
int Universe::_base_vtable_size = 0;
bool Universe::_bootstrapping = false;
bool Universe::_fully_initialized = false;
size_t Universe::_heap_capacity_at_last_gc;
*** 1169,1189 ****
--- 1173,1185 ----
if (!silent) gclog_or_tty->print_cr("]");
_verify_in_progress = false;
}
// Oop verification (see MacroAssembler::verify_oop)
static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1};
static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1};
#ifndef PRODUCT
static void calculate_verify_data(uintptr_t verify_data[2],
HeapWord* low_boundary,
HeapWord* high_boundary) {
+ void Universe::calculate_verify_data(HeapWord* low_boundary, HeapWord* high_boundary) {
assert(low_boundary < high_boundary, "bad interval");
// decide which low-order bits we require to be clear:
size_t alignSize = MinObjAlignmentInBytes;
size_t min_object_size = CollectedHeap::min_fill_size();
*** 1204,1235 ****
--- 1200,1228 ----
assert(bits == ((min + (max-min)/2) & mask), "correct mask");
// require address alignment, too:
mask |= (alignSize - 1);
! if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) {
! assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability");
! if (!(_verify_oop_mask == 0 && _verify_oop_bits == (uintptr_t)-1)) {
! assert(_verify_oop_mask == mask && _verify_oop_bits == bits, "mask stability");
}
! verify_data[0] = mask;
! verify_data[1] = bits;
! _verify_oop_mask = mask;
! _verify_oop_bits = bits;
}
// Oop verification (see MacroAssembler::verify_oop)
uintptr_t Universe::verify_oop_mask() {
MemRegion m = heap()->reserved_region();
! calculate_verify_data(_verify_oop_data,
m.start(),
m.end());
return _verify_oop_data[0];
! calculate_verify_data(m.start(), m.end());
+ return _verify_oop_mask;
}
uintptr_t Universe::verify_oop_bits() {
! verify_oop_mask();
! return _verify_oop_data[1];
! MemRegion m = heap()->reserved_region();
! calculate_verify_data(m.start(), m.end());
+ return _verify_oop_bits;
}
uintptr_t Universe::verify_mark_mask() {
return markOopDesc::lock_mask_in_place;
}
src/share/vm/memory/universe.cpp
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