Mercurial > hg > truffle
annotate src/cpu/zero/vm/javaFrameAnchor_zero.hpp @ 1673:6709c14587c2 jdk7-b105
Added tag jdk7-b104 for changeset b4acf10eb134
| author | cl |
|---|---|
| date | Fri, 06 Aug 2010 12:51:54 -0700 |
| parents | c18cbe5936b8 |
| children | 13b87063b4d8 |
| rev | line source |
|---|---|
| 1010 | 1 /* |
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2 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. |
| 1505 | 3 * Copyright 2007, 2008, 2010 Red Hat, Inc. |
| 1010 | 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
|
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
| 1010 | 23 * |
| 24 */ | |
| 25 | |
| 1505 | 26 private: |
| 27 ZeroFrame* volatile _last_Java_fp; | |
| 28 | |
| 1010 | 29 public: |
| 30 // Each arch must define reset, save, restore | |
| 31 // These are used by objects that only care about: | |
| 32 // 1 - initializing a new state (thread creation, javaCalls) | |
| 33 // 2 - saving a current state (javaCalls) | |
| 34 // 3 - restoring an old state (javaCalls) | |
| 1505 | 35 // Note that whenever _last_Java_sp != NULL other anchor fields |
| 36 // must be valid. The profiler apparently depends on this. | |
| 1010 | 37 |
| 38 void clear() { | |
| 39 // clearing _last_Java_sp must be first | |
| 40 _last_Java_sp = NULL; | |
| 41 // fence? | |
| 1505 | 42 _last_Java_fp = NULL; |
| 1010 | 43 _last_Java_pc = NULL; |
| 44 } | |
| 45 | |
| 46 void copy(JavaFrameAnchor* src) { | |
| 1505 | 47 set(src->_last_Java_sp, src->_last_Java_pc, src->_last_Java_fp); |
| 48 } | |
| 49 | |
| 50 void set(intptr_t* sp, address pc, ZeroFrame* fp) { | |
| 1010 | 51 // In order to make sure the transition state is valid for "this" |
| 52 // We must clear _last_Java_sp before copying the rest of the new | |
| 53 // data | |
| 54 // | |
| 55 // Hack Alert: Temporary bugfix for 4717480/4721647 To act like | |
| 56 // previous version (pd_cache_state) don't NULL _last_Java_sp | |
| 57 // unless the value is changing | |
| 58 // | |
| 1505 | 59 if (_last_Java_sp != sp) |
| 1010 | 60 _last_Java_sp = NULL; |
| 61 | |
| 1505 | 62 _last_Java_fp = fp; |
| 63 _last_Java_pc = pc; | |
| 1010 | 64 // Must be last so profiler will always see valid frame if |
| 65 // has_last_frame() is true | |
| 1505 | 66 _last_Java_sp = sp; |
| 1010 | 67 } |
| 68 | |
| 69 bool walkable() { | |
| 70 return true; | |
| 71 } | |
| 72 | |
| 73 void make_walkable(JavaThread* thread) { | |
| 74 // nothing to do | |
| 75 } | |
| 76 | |
| 77 intptr_t* last_Java_sp() const { | |
| 78 return _last_Java_sp; | |
| 79 } | |
| 80 | |
| 1505 | 81 ZeroFrame* last_Java_fp() const { |
| 82 return _last_Java_fp; | |
| 1010 | 83 } |
| 1512 | 84 |
| 85 static ByteSize last_Java_fp_offset() { | |
| 86 return byte_offset_of(JavaFrameAnchor, _last_Java_fp); | |
| 87 } |