--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/z/zLiveMap.hpp Tue Jun 12 17:40:28 2018 +0200
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2015, 2017, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef SHARE_GC_Z_ZLIVEMAP_HPP
+#define SHARE_GC_Z_ZLIVEMAP_HPP
+
+#include "gc/z/zBitMap.hpp"
+#include "memory/allocation.hpp"
+
+class ObjectClosure;
+
+class ZLiveMap {
+ friend class ZLiveMapTest;
+
+private:
+ static const size_t nsegments = 64;
+
+ volatile uint32_t _seqnum; // Mark sequence number
+ volatile uint32_t _live_objects; // Number of live objects
+ volatile size_t _live_bytes; // Number of live bytes
+ BitMap::bm_word_t _segment_live_bits; // Segment live bits
+ BitMap::bm_word_t _segment_claim_bits; // Segment claim bits
+ ZBitMap _bitmap; // Mark bitmap
+ const size_t _shift; // Segment shift
+
+ const BitMapView segment_live_bits() const;
+ const BitMapView segment_claim_bits() const;
+
+ BitMapView segment_live_bits();
+ BitMapView segment_claim_bits();
+
+ BitMap::idx_t segment_size() const;
+
+ BitMap::idx_t segment_start(BitMap::idx_t segment) const;
+ BitMap::idx_t segment_end(BitMap::idx_t segment) const;
+
+ bool is_segment_live(BitMap::idx_t segment) const;
+ bool set_segment_live_atomic(BitMap::idx_t segment);
+
+ BitMap::idx_t first_live_segment() const;
+ BitMap::idx_t next_live_segment(BitMap::idx_t segment) const;
+ BitMap::idx_t index_to_segment(BitMap::idx_t index) const;
+
+ bool claim_segment(BitMap::idx_t segment);
+
+ void reset(size_t index);
+ void reset_segment(BitMap::idx_t segment);
+
+ void iterate_segment(ObjectClosure* cl, BitMap::idx_t segment, uintptr_t page_start, size_t page_object_alignment_shift);
+
+public:
+ ZLiveMap(uint32_t size);
+
+ void reset();
+
+ bool is_marked() const;
+
+ uint32_t live_objects() const;
+ size_t live_bytes() const;
+
+ bool get(size_t index) const;
+ bool set_atomic(size_t index, bool finalizable, bool& inc_live);
+
+ void inc_live_atomic(uint32_t objects, size_t bytes);
+
+ void iterate(ObjectClosure* cl, uintptr_t page_start, size_t page_object_alignment_shift);
+};
+
+#endif // SHARE_GC_Z_ZLIVEMAP_HPP