Mercurial > hg > truffle
annotate src/cpu/sparc/vm/javaFrameAnchor_sparc.hpp @ 18408:2c3666f44855
Truffle: initial commit of object API implementation
| author | Andreas Woess <andreas.woess@jku.at> |
|---|---|
| date | Tue, 18 Nov 2014 23:19:43 +0100 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef CPU_SPARC_VM_JAVAFRAMEANCHOR_SPARC_HPP |
| 26 #define CPU_SPARC_VM_JAVAFRAMEANCHOR_SPARC_HPP | |
| 27 | |
| 0 | 28 private: |
| 29 volatile int _flags; | |
| 30 | |
| 31 public: | |
| 32 | |
| 33 enum pd_Constants { | |
| 34 flushed = 1 // winodows have flushed | |
| 35 }; | |
| 36 | |
| 37 int flags(void) { return _flags; } | |
| 38 void set_flags(int flags) { _flags = flags; } | |
| 39 | |
| 40 static ByteSize flags_offset() { return byte_offset_of(JavaFrameAnchor, _flags); } | |
| 41 | |
| 42 // Each arch must define clear, copy | |
| 43 // These are used by objects that only care about: | |
| 44 // 1 - initializing a new state (thread creation, javaCalls) | |
| 45 // 2 - saving a current state (javaCalls) | |
| 46 // 3 - restoring an old state (javaCalls) | |
| 47 | |
| 48 void clear(void) { | |
| 49 // clearing _last_Java_sp must be first | |
| 50 _last_Java_sp = NULL; | |
| 51 // fence? | |
| 52 _flags = 0; | |
| 53 _last_Java_pc = NULL; | |
| 54 } | |
| 55 | |
| 56 void copy(JavaFrameAnchor* src) { | |
| 57 // In order to make sure the transition state is valid for "this" | |
| 58 // We must clear _last_Java_sp before copying the rest of the new data | |
| 59 // | |
| 60 // Hack Alert: Temporary bugfix for 4717480/4721647 | |
| 61 // To act like previous version (pd_cache_state) don't NULL _last_Java_sp | |
| 62 // unless the value is changing | |
| 63 // | |
| 64 if (_last_Java_sp != src->_last_Java_sp) | |
| 65 _last_Java_sp = NULL; | |
| 66 | |
| 67 _flags = src->_flags; | |
| 68 _last_Java_pc = src->_last_Java_pc; | |
| 69 // Must be last so profiler will always see valid frame if has_last_frame() is true | |
| 70 _last_Java_sp = src->_last_Java_sp; | |
| 71 } | |
| 72 | |
| 73 // Is stack walkable | |
| 74 inline bool walkable( void) { | |
| 75 return _flags & flushed; | |
| 76 } | |
| 77 | |
| 78 void make_walkable(JavaThread* thread); | |
| 79 | |
| 80 void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } | |
| 81 | |
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82 address last_Java_pc(void) { return _last_Java_pc; } |
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83 |
| 0 | 84 // These are only used by friends |
| 85 private: | |
| 86 | |
| 87 intptr_t* last_Java_sp() const { | |
| 88 // _last_Java_sp will always be a an unbiased stack pointer | |
| 89 // if is is biased then some setter screwed up. This is | |
| 90 // deadly. | |
| 91 #ifdef _LP64 | |
| 92 assert(((intptr_t)_last_Java_sp & 0xF) == 0, "Biased last_Java_sp"); | |
| 93 #endif | |
| 94 return _last_Java_sp; | |
| 95 } | |
| 96 | |
| 97 void capture_last_Java_pc(intptr_t* sp); | |
| 98 | |
| 99 void set_window_flushed( void) { | |
| 100 _flags |= flushed; | |
| 101 OrderAccess::fence(); | |
| 102 } | |
| 1972 | 103 |
| 104 #endif // CPU_SPARC_VM_JAVAFRAMEANCHOR_SPARC_HPP |