Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/classFileParser.hpp @ 935:05f89f00a864
6798898: CMS: bugs related to class unloading
Summary: Override should_remember_klasses() and remember_klass() as needed.
Reviewed-by: ysr, jcoomes
author | jmasa |
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date | Mon, 24 Aug 2009 10:36:31 -0700 |
parents | 6a93908f268f |
children | b37c246bf7ce ad6585fd4087 |
rev | line source |
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0 | 1 /* |
710 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // Parser for for .class files | |
26 // | |
27 // The bytes describing the class file structure is read from a Stream object | |
28 | |
29 class ClassFileParser VALUE_OBJ_CLASS_SPEC { | |
30 private: | |
31 bool _need_verify; | |
32 bool _relax_verify; | |
33 u2 _major_version; | |
34 u2 _minor_version; | |
35 symbolHandle _class_name; | |
710 | 36 KlassHandle _host_klass; |
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37 GrowableArray<Handle>* _cp_patches; // overrides for CP entries |
0 | 38 |
39 bool _has_finalizer; | |
40 bool _has_empty_finalizer; | |
41 bool _has_vanilla_constructor; | |
42 | |
43 enum { fixed_buffer_size = 128 }; | |
44 u_char linenumbertable_buffer[fixed_buffer_size]; | |
45 | |
46 ClassFileStream* _stream; // Actual input stream | |
47 | |
48 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names | |
49 | |
50 // Accessors | |
51 ClassFileStream* stream() { return _stream; } | |
52 void set_stream(ClassFileStream* st) { _stream = st; } | |
53 | |
54 // Constant pool parsing | |
55 void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS); | |
56 | |
57 constantPoolHandle parse_constant_pool(TRAPS); | |
58 | |
59 // Interface parsing | |
60 objArrayHandle parse_interfaces(constantPoolHandle cp, | |
61 int length, | |
62 Handle class_loader, | |
63 Handle protection_domain, | |
64 symbolHandle class_name, | |
65 TRAPS); | |
66 | |
67 // Field parsing | |
68 void parse_field_attributes(constantPoolHandle cp, u2 attributes_count, | |
69 bool is_static, u2 signature_index, | |
70 u2* constantvalue_index_addr, | |
71 bool* is_synthetic_addr, | |
72 u2* generic_signature_index_addr, | |
73 typeArrayHandle* field_annotations, TRAPS); | |
74 typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface, | |
75 struct FieldAllocationCount *fac, | |
76 objArrayHandle* fields_annotations, TRAPS); | |
77 | |
78 // Method parsing | |
79 methodHandle parse_method(constantPoolHandle cp, bool is_interface, | |
80 AccessFlags* promoted_flags, | |
81 typeArrayHandle* method_annotations, | |
82 typeArrayHandle* method_parameter_annotations, | |
83 typeArrayHandle* method_default_annotations, | |
84 TRAPS); | |
85 objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface, | |
86 AccessFlags* promoted_flags, | |
87 bool* has_final_method, | |
88 objArrayOop* methods_annotations_oop, | |
89 objArrayOop* methods_parameter_annotations_oop, | |
90 objArrayOop* methods_default_annotations_oop, | |
91 TRAPS); | |
92 typeArrayHandle sort_methods (objArrayHandle methods, | |
93 objArrayHandle methods_annotations, | |
94 objArrayHandle methods_parameter_annotations, | |
95 objArrayHandle methods_default_annotations, | |
96 TRAPS); | |
97 typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length, | |
98 constantPoolHandle cp, TRAPS); | |
99 void parse_linenumber_table( | |
100 u4 code_attribute_length, u4 code_length, | |
101 CompressedLineNumberWriteStream** write_stream, TRAPS); | |
102 u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length, | |
103 constantPoolHandle cp, u2* localvariable_table_length, | |
104 bool isLVTT, TRAPS); | |
105 u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length, | |
106 constantPoolHandle cp, TRAPS); | |
107 void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
108 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS); | |
109 typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS); | |
110 | |
111 // Classfile attribute parsing | |
112 void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
113 void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
114 instanceKlassHandle k, int length, TRAPS); | |
115 u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp, | |
116 instanceKlassHandle k, TRAPS); | |
117 void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
118 void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
119 void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); | |
120 | |
121 // Annotations handling | |
122 typeArrayHandle assemble_annotations(u1* runtime_visible_annotations, | |
123 int runtime_visible_annotations_length, | |
124 u1* runtime_invisible_annotations, | |
125 int runtime_invisible_annotations_length, TRAPS); | |
126 | |
127 // Final setup | |
128 int compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_count, | |
129 int first_nonstatic_oop_offset); | |
130 void fill_oop_maps(instanceKlassHandle k, int nonstatic_oop_map_count, | |
131 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length); | |
132 void set_precomputed_flags(instanceKlassHandle k); | |
133 objArrayHandle compute_transitive_interfaces(instanceKlassHandle super, | |
134 objArrayHandle local_ifs, TRAPS); | |
135 | |
136 // Special handling for certain classes. | |
137 // Add the "discovered" field to java.lang.ref.Reference if | |
138 // it does not exist. | |
139 void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
140 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS); | |
141 // Adjust the field allocation counts for java.lang.Class to add | |
142 // fake fields. | |
143 void java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
144 FieldAllocationCount *fac_ptr, TRAPS); | |
145 // Adjust the next_nonstatic_oop_offset to place the fake fields | |
146 // before any Java fields. | |
147 void java_lang_Class_fix_post(int* next_nonstatic_oop_offset); | |
710 | 148 // Adjust the field allocation counts for java.dyn.MethodHandle to add |
149 // a fake address (void*) field. | |
150 void java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
151 typeArrayHandle* fields_ptr, | |
152 FieldAllocationCount *fac_ptr, TRAPS); | |
0 | 153 |
154 // Format checker methods | |
155 void classfile_parse_error(const char* msg, TRAPS); | |
156 void classfile_parse_error(const char* msg, int index, TRAPS); | |
157 void classfile_parse_error(const char* msg, const char *name, TRAPS); | |
158 void classfile_parse_error(const char* msg, int index, const char *name, TRAPS); | |
159 inline void guarantee_property(bool b, const char* msg, TRAPS) { | |
160 if (!b) { classfile_parse_error(msg, CHECK); } | |
161 } | |
162 | |
163 inline void assert_property(bool b, const char* msg, TRAPS) { | |
164 #ifdef ASSERT | |
165 if (!b) { fatal(msg); } | |
166 #endif | |
167 } | |
168 | |
169 inline void check_property(bool property, const char* msg, int index, TRAPS) { | |
170 if (_need_verify) { | |
171 guarantee_property(property, msg, index, CHECK); | |
172 } else { | |
173 assert_property(property, msg, CHECK); | |
174 } | |
175 } | |
176 | |
177 inline void check_property(bool property, const char* msg, TRAPS) { | |
178 if (_need_verify) { | |
179 guarantee_property(property, msg, CHECK); | |
180 } else { | |
181 assert_property(property, msg, CHECK); | |
182 } | |
183 } | |
184 | |
185 inline void guarantee_property(bool b, const char* msg, int index, TRAPS) { | |
186 if (!b) { classfile_parse_error(msg, index, CHECK); } | |
187 } | |
188 inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) { | |
189 if (!b) { classfile_parse_error(msg, name, CHECK); } | |
190 } | |
191 inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) { | |
192 if (!b) { classfile_parse_error(msg, index, name, CHECK); } | |
193 } | |
194 | |
195 bool is_supported_version(u2 major, u2 minor); | |
196 bool has_illegal_visibility(jint flags); | |
197 | |
198 void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS); | |
199 void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS); | |
200 void verify_legal_class_name(symbolHandle name, TRAPS); | |
201 void verify_legal_field_name(symbolHandle name, TRAPS); | |
202 void verify_legal_method_name(symbolHandle name, TRAPS); | |
203 void verify_legal_field_signature(symbolHandle fieldname, symbolHandle signature, TRAPS); | |
204 int verify_legal_method_signature(symbolHandle methodname, symbolHandle signature, TRAPS); | |
205 void verify_legal_class_modifiers(jint flags, TRAPS); | |
206 void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS); | |
207 void verify_legal_method_modifiers(jint flags, bool is_interface, symbolHandle name, TRAPS); | |
208 bool verify_unqualified_name(char* name, unsigned int length, int type); | |
209 char* skip_over_field_name(char* name, bool slash_ok, unsigned int length); | |
210 char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS); | |
211 | |
710 | 212 bool is_anonymous() { |
213 assert(AnonymousClasses || _host_klass.is_null(), ""); | |
214 return _host_klass.not_null(); | |
215 } | |
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216 bool has_cp_patch_at(int index) { |
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217 assert(AnonymousClasses, ""); |
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218 assert(index >= 0, "oob"); |
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219 return (_cp_patches != NULL |
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220 && index < _cp_patches->length() |
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221 && _cp_patches->adr_at(index)->not_null()); |
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222 } |
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223 Handle cp_patch_at(int index) { |
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224 assert(has_cp_patch_at(index), "oob"); |
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225 return _cp_patches->at(index); |
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226 } |
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227 Handle clear_cp_patch_at(int index) { |
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228 Handle patch = cp_patch_at(index); |
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229 _cp_patches->at_put(index, Handle()); |
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230 assert(!has_cp_patch_at(index), ""); |
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231 return patch; |
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232 } |
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233 void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS); |
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234 |
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235 // Wrapper for constantTag.is_klass_[or_]reference. |
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236 // In older versions of the VM, klassOops cannot sneak into early phases of |
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237 // constant pool construction, but in later versions they can. |
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238 // %%% Let's phase out the old is_klass_reference. |
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239 bool is_klass_reference(constantPoolHandle cp, int index) { |
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240 return ((LinkWellKnownClasses || AnonymousClasses) |
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241 ? cp->tag_at(index).is_klass_or_reference() |
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242 : cp->tag_at(index).is_klass_reference()); |
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243 } |
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244 |
0 | 245 public: |
246 // Constructor | |
247 ClassFileParser(ClassFileStream* st) { set_stream(st); } | |
248 | |
249 // Parse .class file and return new klassOop. The klassOop is not hooked up | |
250 // to the system dictionary or any other structures, so a .class file can | |
251 // be loaded several times if desired. | |
252 // The system dictionary hookup is done by the caller. | |
253 // | |
254 // "parsed_name" is updated by this method, and is the name found | |
255 // while parsing the stream. | |
256 instanceKlassHandle parseClassFile(symbolHandle name, | |
257 Handle class_loader, | |
258 Handle protection_domain, | |
259 symbolHandle& parsed_name, | |
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260 TRAPS) { |
710 | 261 KlassHandle no_host_klass; |
262 return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, THREAD); | |
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263 } |
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264 instanceKlassHandle parseClassFile(symbolHandle name, |
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265 Handle class_loader, |
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266 Handle protection_domain, |
710 | 267 KlassHandle host_klass, |
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268 GrowableArray<Handle>* cp_patches, |
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269 symbolHandle& parsed_name, |
0 | 270 TRAPS); |
271 | |
272 // Verifier checks | |
273 static void check_super_class_access(instanceKlassHandle this_klass, TRAPS); | |
274 static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS); | |
275 static void check_final_method_override(instanceKlassHandle this_klass, TRAPS); | |
276 static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS); | |
277 }; |