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8069016: Add BarrierSet downcast support

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Add FakeRttiSupport utility and use to provide barrier_set_cast.

Reviewed-by: jmasa, sangheki
This commit is contained in:
Kim Barrett 2015-02-27 19:52:48 -05:00
parent 1426bc9dc1
commit 40d3986051
32 changed files with 289 additions and 131 deletions
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6
hotspot/src/cpu/x86/vm/macroAssembler_x86.cpp
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@ -4204,8 +4204,8 @@ void MacroAssembler::g1_write_barrier_post(Register store_addr,
Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
PtrQueue::byte_offset_of_buf()));
BarrierSet* bs = Universe::heap()->barrier_set();
CardTableModRefBS* ct = (CardTableModRefBS*)bs;
CardTableModRefBS* ct =
barrier_set_cast<CardTableModRefBS>(Universe::heap()->barrier_set());
assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
Label done;
@ -4305,7 +4305,7 @@ void MacroAssembler::store_check_part_1(Register obj) {
void MacroAssembler::store_check_part_2(Register obj) {
BarrierSet* bs = Universe::heap()->barrier_set();
assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
CardTableModRefBS* ct = (CardTableModRefBS*)bs;
CardTableModRefBS* ct = barrier_set_cast<CardTableModRefBS>(bs);
assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
// The calculation for byte_map_base is as follows: