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1 /* |
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2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * Copyright (c) 2012, 2014 SAP SE. All rights reserved. |
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * |
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6 * This code is free software; you can redistribute it and/or modify it |
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7 * under the terms of the GNU General Public License version 2 only, as |
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8 * published by the Free Software Foundation. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file that |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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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. |
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23 * |
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24 */ |
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25 |
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26 #ifndef CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP |
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27 #define CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP |
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28 |
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29 public: |
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30 // Each arch must define reset, save, restore |
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31 // These are used by objects that only care about: |
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32 // 1 - initializing a new state (thread creation, javaCalls) |
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33 // 2 - saving a current state (javaCalls) |
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34 // 3 - restoring an old state (javaCalls) |
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35 |
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36 inline void clear(void) { |
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37 // clearing _last_Java_sp must be first |
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38 _last_Java_sp = NULL; |
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39 // fence? |
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40 OrderAccess::release(); |
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41 _last_Java_pc = NULL; |
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42 } |
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43 |
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44 inline void set(intptr_t* sp, address pc) { |
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45 _last_Java_pc = pc; |
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46 OrderAccess::release(); |
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47 _last_Java_sp = sp; |
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48 } |
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49 |
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50 void copy(JavaFrameAnchor* src) { |
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51 // In order to make sure the transition state is valid for "this". |
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52 // We must clear _last_Java_sp before copying the rest of the new data. |
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53 // |
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54 // Hack Alert: Temporary bugfix for 4717480/4721647 |
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55 // To act like previous version (pd_cache_state) don't NULL _last_Java_sp |
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56 // unless the value is changing. |
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57 if (_last_Java_sp != src->_last_Java_sp) { |
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58 _last_Java_sp = NULL; |
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59 OrderAccess::release(); |
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60 } |
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61 _last_Java_pc = src->_last_Java_pc; |
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62 // Must be last so profiler will always see valid frame if has_last_frame() is true. |
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63 OrderAccess::release(); |
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64 _last_Java_sp = src->_last_Java_sp; |
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65 } |
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66 |
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67 // Always walkable. |
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68 bool walkable(void) { return true; } |
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69 // Never any thing to do since we are always walkable and can find address of return addresses. |
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70 void make_walkable(JavaThread* thread) { } |
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71 |
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72 intptr_t* last_Java_sp(void) const { return _last_Java_sp; } |
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73 |
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74 address last_Java_pc(void) { return _last_Java_pc; } |
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75 |
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76 void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; } |
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77 |
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78 #endif // CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP |