Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | dad31fc330cd |
| children | 8033953d67ff |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP |
| 26 #define SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP | |
| 27 | |
| 28 #include "classfile/classFileStream.hpp" | |
| 29 #include "memory/resourceArea.hpp" | |
| 30 #include "oops/oop.inline.hpp" | |
| 31 #include "oops/typeArrayOop.hpp" | |
| 32 #include "runtime/handles.inline.hpp" | |
| 33 #include "utilities/accessFlags.hpp" | |
| 34 | |
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35 class TempNewSymbol; |
| 0 | 36 // Parser for for .class files |
| 37 // | |
| 38 // The bytes describing the class file structure is read from a Stream object | |
| 39 | |
| 40 class ClassFileParser VALUE_OBJ_CLASS_SPEC { | |
| 41 private: | |
| 42 bool _need_verify; | |
| 43 bool _relax_verify; | |
| 44 u2 _major_version; | |
| 45 u2 _minor_version; | |
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46 Symbol* _class_name; |
| 710 | 47 KlassHandle _host_klass; |
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48 GrowableArray<Handle>* _cp_patches; // overrides for CP entries |
| 0 | 49 |
| 50 bool _has_finalizer; | |
| 51 bool _has_empty_finalizer; | |
| 52 bool _has_vanilla_constructor; | |
| 53 | |
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54 int _max_bootstrap_specifier_index; |
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55 |
| 0 | 56 enum { fixed_buffer_size = 128 }; |
| 57 u_char linenumbertable_buffer[fixed_buffer_size]; | |
| 58 | |
| 59 ClassFileStream* _stream; // Actual input stream | |
| 60 | |
| 61 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names | |
| 62 | |
| 63 // Accessors | |
| 64 ClassFileStream* stream() { return _stream; } | |
| 65 void set_stream(ClassFileStream* st) { _stream = st; } | |
| 66 | |
| 67 // Constant pool parsing | |
| 68 void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS); | |
| 69 | |
| 70 constantPoolHandle parse_constant_pool(TRAPS); | |
| 71 | |
| 72 // Interface parsing | |
| 73 objArrayHandle parse_interfaces(constantPoolHandle cp, | |
| 74 int length, | |
| 75 Handle class_loader, | |
| 76 Handle protection_domain, | |
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77 Symbol* class_name, |
| 0 | 78 TRAPS); |
| 79 | |
| 80 // Field parsing | |
| 81 void parse_field_attributes(constantPoolHandle cp, u2 attributes_count, | |
| 82 bool is_static, u2 signature_index, | |
| 83 u2* constantvalue_index_addr, | |
| 84 bool* is_synthetic_addr, | |
| 85 u2* generic_signature_index_addr, | |
| 86 typeArrayHandle* field_annotations, TRAPS); | |
| 87 typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface, | |
| 88 struct FieldAllocationCount *fac, | |
| 89 objArrayHandle* fields_annotations, TRAPS); | |
| 90 | |
| 91 // Method parsing | |
| 92 methodHandle parse_method(constantPoolHandle cp, bool is_interface, | |
| 93 AccessFlags* promoted_flags, | |
| 94 typeArrayHandle* method_annotations, | |
| 95 typeArrayHandle* method_parameter_annotations, | |
| 96 typeArrayHandle* method_default_annotations, | |
| 97 TRAPS); | |
| 98 objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface, | |
| 99 AccessFlags* promoted_flags, | |
| 100 bool* has_final_method, | |
| 101 objArrayOop* methods_annotations_oop, | |
| 102 objArrayOop* methods_parameter_annotations_oop, | |
| 103 objArrayOop* methods_default_annotations_oop, | |
| 104 TRAPS); | |
| 105 typeArrayHandle sort_methods (objArrayHandle methods, | |
| 106 objArrayHandle methods_annotations, | |
| 107 objArrayHandle methods_parameter_annotations, | |
| 108 objArrayHandle methods_default_annotations, | |
| 109 TRAPS); | |
| 110 typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length, | |
| 111 constantPoolHandle cp, TRAPS); | |
| 112 void parse_linenumber_table( | |
| 113 u4 code_attribute_length, u4 code_length, | |
| 114 CompressedLineNumberWriteStream** write_stream, TRAPS); | |
| 115 u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length, | |
| 116 constantPoolHandle cp, u2* localvariable_table_length, | |
| 117 bool isLVTT, TRAPS); | |
| 118 u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length, | |
| 119 constantPoolHandle cp, TRAPS); | |
| 120 void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 121 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS); | |
| 122 typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS); | |
| 123 | |
| 124 // Classfile attribute parsing | |
| 125 void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
| 126 void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 127 instanceKlassHandle k, int length, TRAPS); | |
| 128 u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp, | |
| 129 instanceKlassHandle k, TRAPS); | |
| 130 void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
| 131 void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
| 132 void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
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133 void parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, u4 attribute_length, TRAPS); |
| 0 | 134 |
| 135 // Annotations handling | |
| 136 typeArrayHandle assemble_annotations(u1* runtime_visible_annotations, | |
| 137 int runtime_visible_annotations_length, | |
| 138 u1* runtime_invisible_annotations, | |
| 139 int runtime_invisible_annotations_length, TRAPS); | |
| 140 | |
| 141 // Final setup | |
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142 unsigned int compute_oop_map_count(instanceKlassHandle super, |
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143 unsigned int nonstatic_oop_count, |
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144 int first_nonstatic_oop_offset); |
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145 void fill_oop_maps(instanceKlassHandle k, |
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146 unsigned int nonstatic_oop_map_count, |
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147 int* nonstatic_oop_offsets, |
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148 unsigned int* nonstatic_oop_counts); |
| 0 | 149 void set_precomputed_flags(instanceKlassHandle k); |
| 150 objArrayHandle compute_transitive_interfaces(instanceKlassHandle super, | |
| 151 objArrayHandle local_ifs, TRAPS); | |
| 152 | |
| 153 // Special handling for certain classes. | |
| 154 // Add the "discovered" field to java.lang.ref.Reference if | |
| 155 // it does not exist. | |
| 156 void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 157 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS); | |
| 158 // Adjust the field allocation counts for java.lang.Class to add | |
| 159 // fake fields. | |
| 160 void java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 161 FieldAllocationCount *fac_ptr, TRAPS); | |
| 162 // Adjust the next_nonstatic_oop_offset to place the fake fields | |
| 163 // before any Java fields. | |
| 164 void java_lang_Class_fix_post(int* next_nonstatic_oop_offset); | |
| 710 | 165 // Adjust the field allocation counts for java.dyn.MethodHandle to add |
| 166 // a fake address (void*) field. | |
| 167 void java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
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168 typeArrayHandle fields, |
| 710 | 169 FieldAllocationCount *fac_ptr, TRAPS); |
| 0 | 170 |
| 171 // Format checker methods | |
| 172 void classfile_parse_error(const char* msg, TRAPS); | |
| 173 void classfile_parse_error(const char* msg, int index, TRAPS); | |
| 174 void classfile_parse_error(const char* msg, const char *name, TRAPS); | |
| 175 void classfile_parse_error(const char* msg, int index, const char *name, TRAPS); | |
| 176 inline void guarantee_property(bool b, const char* msg, TRAPS) { | |
| 177 if (!b) { classfile_parse_error(msg, CHECK); } | |
| 178 } | |
| 179 | |
| 180 inline void assert_property(bool b, const char* msg, TRAPS) { | |
| 181 #ifdef ASSERT | |
| 182 if (!b) { fatal(msg); } | |
| 183 #endif | |
| 184 } | |
| 185 | |
| 186 inline void check_property(bool property, const char* msg, int index, TRAPS) { | |
| 187 if (_need_verify) { | |
| 188 guarantee_property(property, msg, index, CHECK); | |
| 189 } else { | |
| 190 assert_property(property, msg, CHECK); | |
| 191 } | |
| 192 } | |
| 193 | |
| 194 inline void check_property(bool property, const char* msg, TRAPS) { | |
| 195 if (_need_verify) { | |
| 196 guarantee_property(property, msg, CHECK); | |
| 197 } else { | |
| 198 assert_property(property, msg, CHECK); | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 inline void guarantee_property(bool b, const char* msg, int index, TRAPS) { | |
| 203 if (!b) { classfile_parse_error(msg, index, CHECK); } | |
| 204 } | |
| 205 inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) { | |
| 206 if (!b) { classfile_parse_error(msg, name, CHECK); } | |
| 207 } | |
| 208 inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) { | |
| 209 if (!b) { classfile_parse_error(msg, index, name, CHECK); } | |
| 210 } | |
| 211 | |
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212 void throwIllegalSignature( |
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213 const char* type, Symbol* name, Symbol* sig, TRAPS); |
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214 |
| 0 | 215 bool is_supported_version(u2 major, u2 minor); |
| 216 bool has_illegal_visibility(jint flags); | |
| 217 | |
| 218 void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS); | |
| 219 void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS); | |
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220 void verify_legal_class_name(Symbol* name, TRAPS); |
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221 void verify_legal_field_name(Symbol* name, TRAPS); |
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222 void verify_legal_method_name(Symbol* name, TRAPS); |
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223 void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS); |
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224 int verify_legal_method_signature(Symbol* methodname, Symbol* signature, TRAPS); |
| 0 | 225 void verify_legal_class_modifiers(jint flags, TRAPS); |
| 226 void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS); | |
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227 void verify_legal_method_modifiers(jint flags, bool is_interface, Symbol* name, TRAPS); |
| 0 | 228 bool verify_unqualified_name(char* name, unsigned int length, int type); |
| 229 char* skip_over_field_name(char* name, bool slash_ok, unsigned int length); | |
| 230 char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS); | |
| 231 | |
| 710 | 232 bool is_anonymous() { |
| 233 assert(AnonymousClasses || _host_klass.is_null(), ""); | |
| 234 return _host_klass.not_null(); | |
| 235 } | |
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236 bool has_cp_patch_at(int index) { |
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237 assert(AnonymousClasses, ""); |
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238 assert(index >= 0, "oob"); |
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239 return (_cp_patches != NULL |
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240 && index < _cp_patches->length() |
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241 && _cp_patches->adr_at(index)->not_null()); |
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242 } |
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243 Handle cp_patch_at(int index) { |
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244 assert(has_cp_patch_at(index), "oob"); |
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245 return _cp_patches->at(index); |
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246 } |
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247 Handle clear_cp_patch_at(int index) { |
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248 Handle patch = cp_patch_at(index); |
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249 _cp_patches->at_put(index, Handle()); |
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250 assert(!has_cp_patch_at(index), ""); |
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251 return patch; |
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252 } |
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253 void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS); |
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254 |
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255 // Wrapper for constantTag.is_klass_[or_]reference. |
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256 // In older versions of the VM, klassOops cannot sneak into early phases of |
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257 // constant pool construction, but in later versions they can. |
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258 // %%% Let's phase out the old is_klass_reference. |
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259 bool is_klass_reference(constantPoolHandle cp, int index) { |
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260 return ((LinkWellKnownClasses || AnonymousClasses) |
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261 ? cp->tag_at(index).is_klass_or_reference() |
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262 : cp->tag_at(index).is_klass_reference()); |
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263 } |
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264 |
| 0 | 265 public: |
| 266 // Constructor | |
| 267 ClassFileParser(ClassFileStream* st) { set_stream(st); } | |
| 268 | |
| 269 // Parse .class file and return new klassOop. The klassOop is not hooked up | |
| 270 // to the system dictionary or any other structures, so a .class file can | |
| 271 // be loaded several times if desired. | |
| 272 // The system dictionary hookup is done by the caller. | |
| 273 // | |
| 274 // "parsed_name" is updated by this method, and is the name found | |
| 275 // while parsing the stream. | |
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276 instanceKlassHandle parseClassFile(Symbol* name, |
| 0 | 277 Handle class_loader, |
| 278 Handle protection_domain, | |
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279 TempNewSymbol& parsed_name, |
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280 bool verify, |
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281 TRAPS) { |
| 710 | 282 KlassHandle no_host_klass; |
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283 return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD); |
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284 } |
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285 instanceKlassHandle parseClassFile(Symbol* name, |
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286 Handle class_loader, |
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287 Handle protection_domain, |
| 710 | 288 KlassHandle host_klass, |
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289 GrowableArray<Handle>* cp_patches, |
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290 TempNewSymbol& parsed_name, |
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291 bool verify, |
| 0 | 292 TRAPS); |
| 293 | |
| 294 // Verifier checks | |
| 295 static void check_super_class_access(instanceKlassHandle this_klass, TRAPS); | |
| 296 static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS); | |
| 297 static void check_final_method_override(instanceKlassHandle this_klass, TRAPS); | |
| 298 static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS); | |
| 299 }; | |
| 1972 | 300 |
| 301 #endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP |