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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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7
hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
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@ -1582,9 +1582,9 @@ void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_Opr
////////////////////////////////////////////////////////////////////////
void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
assert(sizeof(*((CardTableModRefBS*)_bs)->byte_map_base) == sizeof(jbyte), "adjust this code");
LIR_Const* card_table_base = new LIR_Const(((CardTableModRefBS*)_bs)->byte_map_base);
CardTableModRefBS* ct = barrier_set_cast<CardTableModRefBS>(_bs);
assert(sizeof(*(ct->byte_map_base)) == sizeof(jbyte), "adjust this code");
LIR_Const* card_table_base = new LIR_Const(ct->byte_map_base);
if (addr->is_address()) {
LIR_Address* address = addr->as_address_ptr();
// ptr cannot be an object because we use this barrier for array card marks
@ -1609,7 +1609,6 @@ void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc*
__ move(new LIR_Address(FrameMap::Rthread_opr, in_bytes(JavaThread::card_table_base_offset()), T_ADDRESS), tmp);
}
CardTableModRefBS* ct = (CardTableModRefBS*)_bs;
LIR_Address *card_addr = new LIR_Address(tmp, addr, (LIR_Address::Scale) -CardTableModRefBS::card_shift, 0, T_BYTE);
if(((int)ct->byte_map_base & 0xff) == 0) {
__ move(tmp, card_addr);