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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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12
hotspot/src/share/vm/gc_implementation/parallelScavenge/cardTableExtension.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -81,7 +81,7 @@ class CheckForUnmarkedObjects : public ObjectClosure {
assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
_young_gen = heap->young_gen();
_card_table = (CardTableExtension*)heap->barrier_set();
_card_table = barrier_set_cast<CardTableExtension>(heap->barrier_set());
// No point in asserting barrier set type here. Need to make CardTableExtension
// a unique barrier set type.
}
@ -341,7 +341,9 @@ void CardTableExtension::verify_all_young_refs_precise() {
PSOldGen* old_gen = heap->old_gen();
CheckForPreciseMarks check(heap->young_gen(), (CardTableExtension*)heap->barrier_set());
CheckForPreciseMarks check(
heap->young_gen(),
barrier_set_cast<CardTableExtension>(heap->barrier_set()));
old_gen->oop_iterate_no_header(&check);
@ -349,8 +351,8 @@ void CardTableExtension::verify_all_young_refs_precise() {
}
void CardTableExtension::verify_all_young_refs_precise_helper(MemRegion mr) {
CardTableExtension* card_table = (CardTableExtension*)Universe::heap()->barrier_set();
// FIX ME ASSERT HERE
CardTableExtension* card_table =
barrier_set_cast<CardTableExtension>(Universe::heap()->barrier_set());
jbyte* bot = card_table->byte_for(mr.start());
jbyte* top = card_table->byte_for(mr.end());