1 /* 2 * Copyright (c) 2021 SAP SE. All rights reserved. 3 * Copyright (c) 2021, Red Hat Inc. All rights reserved. 4 * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved. 5 * 6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 7 * 8 * This code is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 only, as 10 * published by the Free Software Foundation. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 23 * or visit www.oracle.com if you need additional information or have any 24 * questions. 25 * 26 */ 27 28 #include "precompiled.hpp" 29 30 #include "macroAssembler_aarch64.hpp" 31 #include "oops/compressedKlass.hpp" 32 #include "utilities/ostream.hpp" 33 #include "runtime/globals.hpp" 34 35 // Given an address p, return true if p can be used as an encoding base. 36 // (Some platforms have restrictions of what constitutes a valid base address). 37 bool CompressedKlassPointers::is_valid_base(address p) { 38 return MacroAssembler::klass_decode_mode_for_base(p) != MacroAssembler::KlassDecodeNone; 39 } 40 41 void CompressedKlassPointers::print_mode(outputStream* st) { 42 st->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: %d, " 43 "Narrow klass range: " UINT64_FORMAT_X 44 ", Encoding mode %s", 45 p2i(base()), shift(), KlassEncodingMetaspaceMax, 46 MacroAssembler::describe_klass_decode_mode(MacroAssembler::klass_decode_mode())); 47 } 48