1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/zero/vm/javaFrameAnchor_zero.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,96 @@
1.4 +/*
1.5 + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright 2007, 2008, 2010 Red Hat, Inc.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + *
1.27 + */
1.28 +
1.29 +#ifndef CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
1.30 +#define CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
1.31 +
1.32 + private:
1.33 + ZeroFrame* volatile _last_Java_fp;
1.34 +
1.35 + public:
1.36 + // Each arch must define reset, save, restore
1.37 + // These are used by objects that only care about:
1.38 + // 1 - initializing a new state (thread creation, javaCalls)
1.39 + // 2 - saving a current state (javaCalls)
1.40 + // 3 - restoring an old state (javaCalls)
1.41 + // Note that whenever _last_Java_sp != NULL other anchor fields
1.42 + // must be valid. The profiler apparently depends on this.
1.43 +
1.44 + void clear() {
1.45 + // clearing _last_Java_sp must be first
1.46 + _last_Java_sp = NULL;
1.47 + // fence?
1.48 + _last_Java_fp = NULL;
1.49 + _last_Java_pc = NULL;
1.50 + }
1.51 +
1.52 + void copy(JavaFrameAnchor* src) {
1.53 + set(src->_last_Java_sp, src->_last_Java_pc, src->_last_Java_fp);
1.54 + }
1.55 +
1.56 + void set(intptr_t* sp, address pc, ZeroFrame* fp) {
1.57 + // In order to make sure the transition state is valid for "this"
1.58 + // We must clear _last_Java_sp before copying the rest of the new
1.59 + // data
1.60 + //
1.61 + // Hack Alert: Temporary bugfix for 4717480/4721647 To act like
1.62 + // previous version (pd_cache_state) don't NULL _last_Java_sp
1.63 + // unless the value is changing
1.64 + //
1.65 + if (_last_Java_sp != sp)
1.66 + _last_Java_sp = NULL;
1.67 +
1.68 + _last_Java_fp = fp;
1.69 + _last_Java_pc = pc;
1.70 + // Must be last so profiler will always see valid frame if
1.71 + // has_last_frame() is true
1.72 + _last_Java_sp = sp;
1.73 + }
1.74 +
1.75 + bool walkable() {
1.76 + return true;
1.77 + }
1.78 +
1.79 + void make_walkable(JavaThread* thread) {
1.80 + // nothing to do
1.81 + }
1.82 +
1.83 + intptr_t* last_Java_sp() const {
1.84 + return _last_Java_sp;
1.85 + }
1.86 +
1.87 + ZeroFrame* last_Java_fp() const {
1.88 + return _last_Java_fp;
1.89 + }
1.90 +
1.91 + address last_Java_pc() const {
1.92 + return _last_Java_pc;
1.93 + }
1.94 +
1.95 + static ByteSize last_Java_fp_offset() {
1.96 + return byte_offset_of(JavaFrameAnchor, _last_Java_fp);
1.97 + }
1.98 +
1.99 +#endif // CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
