1 /* |
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2 * Copyright (c) 2003, 2018, 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 SHARE_VM_SERVICES_SERVICEUTIL_HPP |
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26 #define SHARE_VM_SERVICES_SERVICEUTIL_HPP |
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27 |
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28 #include "classfile/systemDictionary.hpp" |
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29 #include "oops/objArrayOop.hpp" |
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30 #include "oops/oop.inline.hpp" |
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31 |
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32 // |
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33 // Serviceability utility functions. |
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34 // (Shared by MM and JVMTI). |
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35 // |
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36 class ServiceUtil : public AllStatic { |
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37 public: |
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38 |
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39 // Return true if oop represents an object that is "visible" |
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40 // to the java world. |
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41 static inline bool visible_oop(oop o) { |
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42 // instance |
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43 if (o->is_instance()) { |
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44 // instance objects are visible |
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45 if (o->klass() != SystemDictionary::Class_klass()) { |
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46 return true; |
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47 } |
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48 if (java_lang_Class::is_primitive(o)) { |
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49 return true; |
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50 } |
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51 // java.lang.Classes are visible |
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52 Klass* k = java_lang_Class::as_Klass(o); |
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53 if (k->is_klass()) { |
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54 // if it's a class for an object, an object array, or |
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55 // primitive (type) array then it's visible. |
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56 if (k->is_instance_klass()) { |
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57 return true; |
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58 } |
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59 if (k->is_objArray_klass()) { |
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60 return true; |
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61 } |
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62 if (k->is_typeArray_klass()) { |
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63 return true; |
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64 } |
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65 } |
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66 fatal("visible_oop: should never reach here #1"); |
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67 return false; |
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68 } |
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69 // object arrays are visible if they aren't system object arrays |
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70 if (o->is_objArray()) { |
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71 return true; |
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72 } |
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73 // type arrays are visible |
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74 if (o->is_typeArray()) { |
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75 return true; |
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76 } |
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77 // everything else (Method*s, ...) aren't visible |
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78 fatal("visible_oop: should never reach here #2"); |
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79 return false; |
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80 }; // end of visible_oop() |
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81 |
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82 }; |
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83 |
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84 #endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP |
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