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annotate src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp @ 14408:ec28f9c041ff

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8019972: PPC64 (part 9): platform files for interpreter only VM. Summary: With this change the HotSpot core build works on Linux/PPC64. The VM succesfully executes simple test programs. Reviewed-by: kvn
author goetz
date Fri, 02 Aug 2013 16:46:45 +0200
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children 58cf34613a72
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14408
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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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 2012, 2013 SAP AG. 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 #ifndef CC_INTERP
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30 #error "CC_INTERP must be defined on PPC64"
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31 #endif
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32
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33 public:
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34 // Each arch must define reset, save, restore
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35 // These are used by objects that only care about:
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36 // 1 - initializing a new state (thread creation, javaCalls)
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37 // 2 - saving a current state (javaCalls)
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38 // 3 - restoring an old state (javaCalls)
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39
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40 inline void clear(void) {
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41 // clearing _last_Java_sp must be first
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42 _last_Java_sp = NULL;
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43 // fence?
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44 OrderAccess::release();
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45 _last_Java_pc = NULL;
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46 }
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47
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48 inline void set(intptr_t* sp, address pc) {
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49 _last_Java_pc = pc;
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50 OrderAccess::release();
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51 _last_Java_sp = sp;
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52 }
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53
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54 void copy(JavaFrameAnchor* src) {
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55 // In order to make sure the transition state is valid for "this".
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56 // We must clear _last_Java_sp before copying the rest of the new data.
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57 //
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58 // Hack Alert: Temporary bugfix for 4717480/4721647
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59 // To act like previous version (pd_cache_state) don't NULL _last_Java_sp
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60 // unless the value is changing.
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61 if (_last_Java_sp != src->_last_Java_sp) {
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62 _last_Java_sp = NULL;
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63 OrderAccess::release();
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64 }
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65 _last_Java_pc = src->_last_Java_pc;
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66 // Must be last so profiler will always see valid frame if has_last_frame() is true.
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67 OrderAccess::release();
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68 _last_Java_sp = src->_last_Java_sp;
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69 }
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70
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71 // Always walkable.
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72 bool walkable(void) { return true; }
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73 // Never any thing to do since we are always walkable and can find address of return addresses.
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74 void make_walkable(JavaThread* thread) { }
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75
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76 intptr_t* last_Java_sp(void) const { return _last_Java_sp; }
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77
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78 address last_Java_pc(void) { return _last_Java_pc; }
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79
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80 void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; }
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81
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82 #endif // CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP