Mercurial > hg > truffle
annotate src/gpu/hsail/vm/gpu_hsail_OopMapHelper.hpp @ 18152:ff694c40bdee
LIRGenerationResult: add buildFrameMap() and getFrameMap().
author | Josef Eisl <josef.eisl@jku.at> |
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date | Wed, 22 Oct 2014 16:54:51 +0200 |
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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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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. |
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22 * |
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23 */ |
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24 |
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25 #ifndef GPU_HSAIL_VM_GPU_HSAIL_OOPMAPHELPER_HPP |
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26 #define GPU_HSAIL_VM_GPU_HSAIL_OOPMAPHELPER_HPP |
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27 |
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28 #include "graal/graalEnv.hpp" |
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29 #include "code/debugInfo.hpp" |
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30 #include "code/location.hpp" |
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31 |
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32 // Takes the jobject for the array of ints created by the java side |
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33 // and decodes the information based on pc_offset to find oops |
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34 class HSAILOopMapHelper : public StackObj { |
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35 private: |
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36 jobject _oop_map_array_jobject; |
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37 typeArrayOop _oop_map_array; |
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38 int _last_pcoffset; |
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39 int _last_idx; |
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40 |
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41 enum { |
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42 SAVEAREACOUNTS_OFST=0, |
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43 SPAN_OFST=1, |
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44 HEADERSIZE=2 |
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45 }; |
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46 int mapPcOffsetToIndex(int pcOffset) { |
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47 if (pcOffset == _last_pcoffset) { |
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48 return _last_idx; |
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49 } |
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50 int span = _oop_map_array->int_at(SPAN_OFST); |
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51 for (int idx = HEADERSIZE; idx < _oop_map_array->length(); idx += span) { |
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52 int ofst = _oop_map_array->int_at(idx); |
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53 if (ofst == pcOffset) { |
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54 _last_pcoffset = pcOffset; |
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55 _last_idx = idx + 1; |
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56 return _last_idx; |
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57 } |
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58 } |
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59 ShouldNotReachHere(); |
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60 return -1; |
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61 } |
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62 |
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63 public: |
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64 HSAILOopMapHelper(jobject oop_map_array_jobject) { |
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65 _oop_map_array_jobject = oop_map_array_jobject; |
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66 _last_pcoffset = -1; |
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67 resolve_arrays(); |
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68 } |
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69 |
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70 void resolve_arrays() { |
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71 _oop_map_array = (typeArrayOop) JNIHandles::resolve(_oop_map_array_jobject); |
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72 } |
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73 |
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74 static int get_save_area_counts(jobject oop_map_array_jobject) { |
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75 typeArrayOop oop_map_array_resolved = (typeArrayOop) JNIHandles::resolve(oop_map_array_jobject); |
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76 return oop_map_array_resolved->int_at(SAVEAREACOUNTS_OFST); |
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77 } |
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78 |
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79 bool is_oop(int pcOffset, int bit){ |
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80 int bits_int_idx = mapPcOffsetToIndex(pcOffset) + (bit / 32); |
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81 int bitpos = bit % 32; |
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82 int bits = _oop_map_array->int_at(bits_int_idx); |
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83 return ((bits & (1 << bitpos)) != 0); |
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84 } |
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85 |
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86 }; |
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87 |
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88 #endif // GPU_HSAIL_VM_GPU_HSAIL_OOPMAPHELPER_HPP |