Mon, 09 Mar 2020 12:54:53 +0000
8240295: hs_err elapsed time in seconds is not accurate enough
Reviewed-by: dholmes, sspitsyn
duke@435 | 1 | /* |
minqi@5103 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP |
stefank@2314 | 26 | #define SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "memory/allocation.hpp" |
stefank@2314 | 29 | #include "oops/instanceKlass.hpp" |
stefank@2314 | 30 | #include "oops/objArrayOop.hpp" |
stefank@2314 | 31 | #include "oops/oopsHierarchy.hpp" |
stefank@2314 | 32 | #include "runtime/handles.inline.hpp" |
stefank@2314 | 33 | #include "runtime/reflection.hpp" |
stefank@2314 | 34 | #include "utilities/accessFlags.hpp" |
stefank@2314 | 35 | #include "utilities/globalDefinitions.hpp" |
stefank@2314 | 36 | |
duke@435 | 37 | // A KlassStream is an abstract stream for streaming over self, superclasses |
duke@435 | 38 | // and (super)interfaces. Streaming is done in reverse order (subclasses first, |
duke@435 | 39 | // interfaces last). |
duke@435 | 40 | // |
acorn@5848 | 41 | // for (KlassStream st(k, false, false, false); !st.eos(); st.next()) { |
coleenp@4037 | 42 | // Klass* k = st.klass(); |
duke@435 | 43 | // ... |
duke@435 | 44 | // } |
duke@435 | 45 | |
duke@435 | 46 | class KlassStream VALUE_OBJ_CLASS_SPEC { |
duke@435 | 47 | protected: |
duke@435 | 48 | instanceKlassHandle _klass; // current klass/interface iterated over |
acorn@5848 | 49 | instanceKlassHandle _base_klass; // initial klass/interface to iterate over |
acorn@5848 | 50 | Array<Klass*>* _interfaces; // transitive interfaces for initial class |
duke@435 | 51 | int _interface_index; // current interface being processed |
duke@435 | 52 | bool _local_only; // process initial class/interface only |
duke@435 | 53 | bool _classes_only; // process classes only (no interfaces) |
acorn@5848 | 54 | bool _walk_defaults; // process default methods |
acorn@5848 | 55 | bool _base_class_search_defaults; // time to process default methods |
acorn@5848 | 56 | bool _defaults_checked; // already checked for default methods |
duke@435 | 57 | int _index; |
duke@435 | 58 | |
acorn@5848 | 59 | virtual int length() = 0; |
duke@435 | 60 | |
duke@435 | 61 | public: |
duke@435 | 62 | // constructor |
acorn@5848 | 63 | KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only, bool walk_defaults); |
duke@435 | 64 | |
duke@435 | 65 | // testing |
duke@435 | 66 | bool eos(); |
duke@435 | 67 | |
duke@435 | 68 | // iterating |
duke@435 | 69 | virtual void next() = 0; |
duke@435 | 70 | |
duke@435 | 71 | // accessors |
duke@435 | 72 | instanceKlassHandle klass() const { return _klass; } |
duke@435 | 73 | int index() const { return _index; } |
acorn@5848 | 74 | bool base_class_search_defaults() const { return _base_class_search_defaults; } |
acorn@5848 | 75 | void base_class_search_defaults(bool b) { _base_class_search_defaults = b; } |
duke@435 | 76 | }; |
duke@435 | 77 | |
duke@435 | 78 | |
duke@435 | 79 | // A MethodStream streams over all methods in a class, superclasses and (super)interfaces. |
duke@435 | 80 | // Streaming is done in reverse order (subclasses first, methods in reverse order) |
duke@435 | 81 | // Usage: |
duke@435 | 82 | // |
duke@435 | 83 | // for (MethodStream st(k, false, false); !st.eos(); st.next()) { |
coleenp@4037 | 84 | // Method* m = st.method(); |
duke@435 | 85 | // ... |
duke@435 | 86 | // } |
duke@435 | 87 | |
duke@435 | 88 | class MethodStream : public KlassStream { |
duke@435 | 89 | private: |
acorn@5848 | 90 | int length() { return methods()->length(); } |
acorn@5848 | 91 | Array<Method*>* methods() { |
acorn@5848 | 92 | if (base_class_search_defaults()) { |
acorn@5848 | 93 | base_class_search_defaults(false); |
acorn@5848 | 94 | return _klass->default_methods(); |
acorn@5848 | 95 | } else { |
acorn@5848 | 96 | return _klass->methods(); |
acorn@5848 | 97 | } |
acorn@5848 | 98 | } |
duke@435 | 99 | public: |
duke@435 | 100 | MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) |
acorn@5848 | 101 | : KlassStream(klass, local_only, classes_only, true) { |
duke@435 | 102 | _index = length(); |
duke@435 | 103 | next(); |
duke@435 | 104 | } |
duke@435 | 105 | |
duke@435 | 106 | void next() { _index--; } |
acorn@5848 | 107 | Method* method() { return methods()->at(index()); } |
duke@435 | 108 | }; |
duke@435 | 109 | |
duke@435 | 110 | |
duke@435 | 111 | // A FieldStream streams over all fields in a class, superclasses and (super)interfaces. |
duke@435 | 112 | // Streaming is done in reverse order (subclasses first, fields in reverse order) |
duke@435 | 113 | // Usage: |
duke@435 | 114 | // |
duke@435 | 115 | // for (FieldStream st(k, false, false); !st.eos(); st.next()) { |
coleenp@2497 | 116 | // Symbol* field_name = st.name(); |
duke@435 | 117 | // ... |
duke@435 | 118 | // } |
duke@435 | 119 | |
duke@435 | 120 | |
duke@435 | 121 | class FieldStream : public KlassStream { |
duke@435 | 122 | private: |
acorn@5848 | 123 | int length() { return _klass->java_fields_count(); } |
never@3137 | 124 | |
drchase@5732 | 125 | fieldDescriptor _fd_buf; |
drchase@5732 | 126 | |
duke@435 | 127 | public: |
duke@435 | 128 | FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) |
acorn@5848 | 129 | : KlassStream(klass, local_only, classes_only, false) { |
duke@435 | 130 | _index = length(); |
duke@435 | 131 | next(); |
duke@435 | 132 | } |
duke@435 | 133 | |
never@3137 | 134 | void next() { _index -= 1; } |
duke@435 | 135 | |
duke@435 | 136 | // Accessors for current field |
duke@435 | 137 | AccessFlags access_flags() const { |
duke@435 | 138 | AccessFlags flags; |
never@3137 | 139 | flags.set_flags(_klass->field_access_flags(_index)); |
duke@435 | 140 | return flags; |
duke@435 | 141 | } |
coleenp@2497 | 142 | Symbol* name() const { |
never@3137 | 143 | return _klass->field_name(_index); |
duke@435 | 144 | } |
coleenp@2497 | 145 | Symbol* signature() const { |
never@3137 | 146 | return _klass->field_signature(_index); |
duke@435 | 147 | } |
duke@435 | 148 | // missing: initval() |
duke@435 | 149 | int offset() const { |
never@3137 | 150 | return _klass->field_offset( index() ); |
duke@435 | 151 | } |
drchase@5732 | 152 | // bridge to a heavier API: |
drchase@5732 | 153 | fieldDescriptor& field_descriptor() const { |
drchase@5732 | 154 | fieldDescriptor& field = const_cast<fieldDescriptor&>(_fd_buf); |
drchase@5732 | 155 | field.reinitialize(_klass(), _index); |
drchase@5732 | 156 | return field; |
drchase@5732 | 157 | } |
duke@435 | 158 | }; |
duke@435 | 159 | |
minqi@5103 | 160 | class FilteredField : public CHeapObj<mtInternal> { |
duke@435 | 161 | private: |
coleenp@4037 | 162 | Klass* _klass; |
minqi@5103 | 163 | int _field_offset; |
duke@435 | 164 | |
duke@435 | 165 | public: |
coleenp@4037 | 166 | FilteredField(Klass* klass, int field_offset) { |
duke@435 | 167 | _klass = klass; |
duke@435 | 168 | _field_offset = field_offset; |
duke@435 | 169 | } |
coleenp@4037 | 170 | Klass* klass() { return _klass; } |
duke@435 | 171 | int field_offset() { return _field_offset; } |
duke@435 | 172 | }; |
duke@435 | 173 | |
duke@435 | 174 | class FilteredFieldsMap : AllStatic { |
duke@435 | 175 | private: |
duke@435 | 176 | static GrowableArray<FilteredField *> *_filtered_fields; |
duke@435 | 177 | public: |
duke@435 | 178 | static void initialize(); |
coleenp@4037 | 179 | static bool is_filtered_field(Klass* klass, int field_offset) { |
duke@435 | 180 | for (int i=0; i < _filtered_fields->length(); i++) { |
duke@435 | 181 | if (klass == _filtered_fields->at(i)->klass() && |
duke@435 | 182 | field_offset == _filtered_fields->at(i)->field_offset()) { |
duke@435 | 183 | return true; |
duke@435 | 184 | } |
duke@435 | 185 | } |
duke@435 | 186 | return false; |
duke@435 | 187 | } |
coleenp@4037 | 188 | static int filtered_fields_count(Klass* klass, bool local_only) { |
duke@435 | 189 | int nflds = 0; |
duke@435 | 190 | for (int i=0; i < _filtered_fields->length(); i++) { |
duke@435 | 191 | if (local_only && klass == _filtered_fields->at(i)->klass()) { |
duke@435 | 192 | nflds++; |
coleenp@4037 | 193 | } else if (klass->is_subtype_of(_filtered_fields->at(i)->klass())) { |
duke@435 | 194 | nflds++; |
duke@435 | 195 | } |
duke@435 | 196 | } |
duke@435 | 197 | return nflds; |
duke@435 | 198 | } |
coleenp@4037 | 199 | // Enhance Class Redefinition Support |
coleenp@4037 | 200 | static void classes_do(KlassClosure* f) { |
duke@435 | 201 | for (int i = 0; i < _filtered_fields->length(); i++) { |
coleenp@4037 | 202 | f->do_klass(_filtered_fields->at(i)->klass()); |
duke@435 | 203 | } |
duke@435 | 204 | } |
duke@435 | 205 | }; |
duke@435 | 206 | |
duke@435 | 207 | |
duke@435 | 208 | // A FilteredFieldStream streams over all fields in a class, superclasses and |
duke@435 | 209 | // (super)interfaces. Streaming is done in reverse order (subclasses first, |
duke@435 | 210 | // fields in reverse order) |
duke@435 | 211 | // |
duke@435 | 212 | // Usage: |
duke@435 | 213 | // |
duke@435 | 214 | // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { |
coleenp@2497 | 215 | // Symbol* field_name = st.name(); |
duke@435 | 216 | // ... |
duke@435 | 217 | // } |
duke@435 | 218 | |
duke@435 | 219 | class FilteredFieldStream : public FieldStream { |
duke@435 | 220 | private: |
duke@435 | 221 | int _filtered_fields_count; |
duke@435 | 222 | bool has_filtered_field() { return (_filtered_fields_count > 0); } |
duke@435 | 223 | |
duke@435 | 224 | public: |
duke@435 | 225 | FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) |
duke@435 | 226 | : FieldStream(klass, local_only, classes_only) { |
coleenp@4037 | 227 | _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((Klass*)klass(), local_only); |
duke@435 | 228 | } |
duke@435 | 229 | int field_count(); |
duke@435 | 230 | void next() { |
never@3137 | 231 | _index -= 1; |
duke@435 | 232 | if (has_filtered_field()) { |
coleenp@4037 | 233 | while (_index >=0 && FilteredFieldsMap::is_filtered_field((Klass*)_klass(), offset())) { |
never@3137 | 234 | _index -= 1; |
duke@435 | 235 | } |
duke@435 | 236 | } |
duke@435 | 237 | } |
duke@435 | 238 | }; |
stefank@2314 | 239 | |
stefank@2314 | 240 | #endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP |