Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.hpp @ 6227:dd785aabe02b
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author | kvn |
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date | Tue, 17 Jul 2012 11:16:13 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" | |
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34 #include "classfile/symbolTable.hpp" |
1972 | 35 |
3938 | 36 class FieldAllocationCount; |
37 | |
38 | |
0 | 39 // Parser for for .class files |
40 // | |
41 // The bytes describing the class file structure is read from a Stream object | |
42 | |
43 class ClassFileParser VALUE_OBJ_CLASS_SPEC { | |
44 private: | |
45 bool _need_verify; | |
46 bool _relax_verify; | |
47 u2 _major_version; | |
48 u2 _minor_version; | |
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49 Symbol* _class_name; |
710 | 50 KlassHandle _host_klass; |
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51 GrowableArray<Handle>* _cp_patches; // overrides for CP entries |
0 | 52 |
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53 // precomputed flags |
0 | 54 bool _has_finalizer; |
55 bool _has_empty_finalizer; | |
56 bool _has_vanilla_constructor; | |
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57 int _max_bootstrap_specifier_index; // detects BSS values |
0 | 58 |
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59 // class attributes parsed before the instance klass is created: |
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60 bool _synthetic_flag; |
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61 Symbol* _sourcefile; |
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62 Symbol* _generic_signature; |
6226 | 63 char* _sde_buffer; |
64 int _sde_length; | |
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65 typeArrayHandle _inner_classes; |
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66 typeArrayHandle _annotations; |
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67 |
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68 void set_class_synthetic_flag(bool x) { _synthetic_flag = x; } |
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69 void set_class_sourcefile(Symbol* x) { _sourcefile = x; } |
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70 void set_class_generic_signature(Symbol* x) { _generic_signature = x; } |
6226 | 71 void set_class_sde_buffer(char* x, int len) { _sde_buffer = x; _sde_length = len; } |
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72 void set_class_inner_classes(typeArrayHandle x) { _inner_classes = x; } |
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73 void set_class_annotations(typeArrayHandle x) { _annotations = x; } |
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74 void init_parsed_class_attributes() { |
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75 _synthetic_flag = false; |
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76 _sourcefile = NULL; |
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77 _generic_signature = NULL; |
6226 | 78 _sde_buffer = NULL; |
79 _sde_length = 0; | |
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80 // initialize the other flags too: |
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81 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; |
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82 _max_bootstrap_specifier_index = -1; |
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83 } |
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84 void apply_parsed_class_attributes(instanceKlassHandle k); // update k |
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85 |
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86 class AnnotationCollector { |
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87 public: |
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88 enum Location { _in_field, _in_method, _in_class }; |
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89 enum ID { |
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90 _unknown = 0, |
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91 _method_ForceInline, |
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92 _annotation_LIMIT |
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93 }; |
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94 const Location _location; |
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95 int _annotations_present; |
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96 AnnotationCollector(Location location) |
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97 : _location(location), _annotations_present(0) |
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98 { |
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99 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); |
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100 } |
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101 // If this annotation name has an ID, report it (or _none). |
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102 ID annotation_index(Symbol* name); |
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103 // Set the annotation name: |
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104 void set_annotation(ID id) { |
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105 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); |
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106 _annotations_present |= nth_bit((int)id); |
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107 } |
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108 // Report if the annotation is present. |
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109 bool has_any_annotations() { return _annotations_present != 0; } |
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110 bool has_annotation(ID id) { return (nth_bit((int)id) & _annotations_present) != 0; } |
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111 }; |
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112 class FieldAnnotationCollector: public AnnotationCollector { |
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113 public: |
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114 FieldAnnotationCollector() : AnnotationCollector(_in_field) { } |
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115 void apply_to(FieldInfo* f); |
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116 }; |
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117 class MethodAnnotationCollector: public AnnotationCollector { |
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118 public: |
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119 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } |
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120 void apply_to(methodHandle m); |
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121 }; |
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122 class ClassAnnotationCollector: public AnnotationCollector { |
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123 public: |
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124 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } |
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125 void apply_to(instanceKlassHandle k); |
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126 }; |
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127 |
0 | 128 enum { fixed_buffer_size = 128 }; |
129 u_char linenumbertable_buffer[fixed_buffer_size]; | |
130 | |
131 ClassFileStream* _stream; // Actual input stream | |
132 | |
133 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names | |
134 | |
135 // Accessors | |
136 ClassFileStream* stream() { return _stream; } | |
137 void set_stream(ClassFileStream* st) { _stream = st; } | |
138 | |
139 // Constant pool parsing | |
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140 void parse_constant_pool_entries(Handle class_loader, |
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141 constantPoolHandle cp, int length, TRAPS); |
0 | 142 |
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143 constantPoolHandle parse_constant_pool(Handle class_loader, TRAPS); |
0 | 144 |
145 // Interface parsing | |
146 objArrayHandle parse_interfaces(constantPoolHandle cp, | |
147 int length, | |
148 Handle class_loader, | |
149 Handle protection_domain, | |
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150 Symbol* class_name, |
0 | 151 TRAPS); |
152 | |
153 // Field parsing | |
154 void parse_field_attributes(constantPoolHandle cp, u2 attributes_count, | |
155 bool is_static, u2 signature_index, | |
156 u2* constantvalue_index_addr, | |
157 bool* is_synthetic_addr, | |
158 u2* generic_signature_index_addr, | |
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159 typeArrayHandle* field_annotations, |
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160 FieldAnnotationCollector* parsed_annotations, |
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161 TRAPS); |
3938 | 162 typeArrayHandle parse_fields(Symbol* class_name, |
163 constantPoolHandle cp, bool is_interface, | |
164 FieldAllocationCount *fac, | |
165 objArrayHandle* fields_annotations, | |
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166 u2* java_fields_count_ptr, TRAPS); |
0 | 167 |
168 // Method parsing | |
169 methodHandle parse_method(constantPoolHandle cp, bool is_interface, | |
170 AccessFlags* promoted_flags, | |
171 typeArrayHandle* method_annotations, | |
172 typeArrayHandle* method_parameter_annotations, | |
173 typeArrayHandle* method_default_annotations, | |
174 TRAPS); | |
175 objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface, | |
176 AccessFlags* promoted_flags, | |
177 bool* has_final_method, | |
178 objArrayOop* methods_annotations_oop, | |
179 objArrayOop* methods_parameter_annotations_oop, | |
180 objArrayOop* methods_default_annotations_oop, | |
181 TRAPS); | |
182 typeArrayHandle sort_methods (objArrayHandle methods, | |
183 objArrayHandle methods_annotations, | |
184 objArrayHandle methods_parameter_annotations, | |
185 objArrayHandle methods_default_annotations, | |
186 TRAPS); | |
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187 u2* parse_exception_table(u4 code_length, u4 exception_table_length, |
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188 constantPoolHandle cp, TRAPS); |
0 | 189 void parse_linenumber_table( |
190 u4 code_attribute_length, u4 code_length, | |
191 CompressedLineNumberWriteStream** write_stream, TRAPS); | |
192 u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length, | |
193 constantPoolHandle cp, u2* localvariable_table_length, | |
194 bool isLVTT, TRAPS); | |
195 u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length, | |
196 constantPoolHandle cp, TRAPS); | |
197 void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
198 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS); | |
199 typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS); | |
200 | |
201 // Classfile attribute parsing | |
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202 void parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS); |
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203 void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, int length, TRAPS); |
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204 u2 parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start, |
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205 bool parsed_enclosingmethod_attribute, |
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206 u2 enclosing_method_class_index, |
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207 u2 enclosing_method_method_index, |
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208 constantPoolHandle cp, |
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209 TRAPS); |
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210 void parse_classfile_attributes(constantPoolHandle cp, |
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211 ClassAnnotationCollector* parsed_annotations, |
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212 TRAPS); |
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213 void parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS); |
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214 void parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS); |
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215 void parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, u4 attribute_length, TRAPS); |
0 | 216 |
217 // Annotations handling | |
218 typeArrayHandle assemble_annotations(u1* runtime_visible_annotations, | |
219 int runtime_visible_annotations_length, | |
220 u1* runtime_invisible_annotations, | |
221 int runtime_invisible_annotations_length, TRAPS); | |
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222 int skip_annotation(u1* buffer, int limit, int index); |
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223 int skip_annotation_value(u1* buffer, int limit, int index); |
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224 void parse_annotations(u1* buffer, int limit, constantPoolHandle cp, |
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225 /* Results (currently, only one result is supported): */ |
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226 AnnotationCollector* result, |
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227 TRAPS); |
0 | 228 |
229 // Final setup | |
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230 unsigned int compute_oop_map_count(instanceKlassHandle super, |
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231 unsigned int nonstatic_oop_count, |
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232 int first_nonstatic_oop_offset); |
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233 void fill_oop_maps(instanceKlassHandle k, |
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234 unsigned int nonstatic_oop_map_count, |
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235 int* nonstatic_oop_offsets, |
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236 unsigned int* nonstatic_oop_counts); |
0 | 237 void set_precomputed_flags(instanceKlassHandle k); |
238 objArrayHandle compute_transitive_interfaces(instanceKlassHandle super, | |
239 objArrayHandle local_ifs, TRAPS); | |
240 | |
241 // Format checker methods | |
242 void classfile_parse_error(const char* msg, TRAPS); | |
243 void classfile_parse_error(const char* msg, int index, TRAPS); | |
244 void classfile_parse_error(const char* msg, const char *name, TRAPS); | |
245 void classfile_parse_error(const char* msg, int index, const char *name, TRAPS); | |
246 inline void guarantee_property(bool b, const char* msg, TRAPS) { | |
247 if (!b) { classfile_parse_error(msg, CHECK); } | |
248 } | |
249 | |
250 inline void assert_property(bool b, const char* msg, TRAPS) { | |
251 #ifdef ASSERT | |
252 if (!b) { fatal(msg); } | |
253 #endif | |
254 } | |
255 | |
256 inline void check_property(bool property, const char* msg, int index, TRAPS) { | |
257 if (_need_verify) { | |
258 guarantee_property(property, msg, index, CHECK); | |
259 } else { | |
260 assert_property(property, msg, CHECK); | |
261 } | |
262 } | |
263 | |
264 inline void check_property(bool property, const char* msg, TRAPS) { | |
265 if (_need_verify) { | |
266 guarantee_property(property, msg, CHECK); | |
267 } else { | |
268 assert_property(property, msg, CHECK); | |
269 } | |
270 } | |
271 | |
272 inline void guarantee_property(bool b, const char* msg, int index, TRAPS) { | |
273 if (!b) { classfile_parse_error(msg, index, CHECK); } | |
274 } | |
275 inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) { | |
276 if (!b) { classfile_parse_error(msg, name, CHECK); } | |
277 } | |
278 inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) { | |
279 if (!b) { classfile_parse_error(msg, index, name, CHECK); } | |
280 } | |
281 | |
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282 void throwIllegalSignature( |
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283 const char* type, Symbol* name, Symbol* sig, TRAPS); |
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284 |
0 | 285 bool is_supported_version(u2 major, u2 minor); |
286 bool has_illegal_visibility(jint flags); | |
287 | |
288 void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS); | |
289 void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS); | |
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290 void verify_legal_class_name(Symbol* name, TRAPS); |
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291 void verify_legal_field_name(Symbol* name, TRAPS); |
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292 void verify_legal_method_name(Symbol* name, TRAPS); |
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293 void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS); |
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294 int verify_legal_method_signature(Symbol* methodname, Symbol* signature, TRAPS); |
0 | 295 void verify_legal_class_modifiers(jint flags, TRAPS); |
296 void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS); | |
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297 void verify_legal_method_modifiers(jint flags, bool is_interface, Symbol* name, TRAPS); |
0 | 298 bool verify_unqualified_name(char* name, unsigned int length, int type); |
299 char* skip_over_field_name(char* name, bool slash_ok, unsigned int length); | |
300 char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS); | |
301 | |
710 | 302 bool is_anonymous() { |
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303 assert(EnableInvokeDynamic || _host_klass.is_null(), ""); |
710 | 304 return _host_klass.not_null(); |
305 } | |
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306 bool has_cp_patch_at(int index) { |
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307 assert(EnableInvokeDynamic, ""); |
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308 assert(index >= 0, "oob"); |
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309 return (_cp_patches != NULL |
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310 && index < _cp_patches->length() |
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311 && _cp_patches->adr_at(index)->not_null()); |
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312 } |
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313 Handle cp_patch_at(int index) { |
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314 assert(has_cp_patch_at(index), "oob"); |
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315 return _cp_patches->at(index); |
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316 } |
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317 Handle clear_cp_patch_at(int index) { |
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318 Handle patch = cp_patch_at(index); |
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319 _cp_patches->at_put(index, Handle()); |
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320 assert(!has_cp_patch_at(index), ""); |
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321 return patch; |
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322 } |
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323 void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS); |
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324 |
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325 // Wrapper for constantTag.is_klass_[or_]reference. |
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326 // In older versions of the VM, klassOops cannot sneak into early phases of |
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327 // constant pool construction, but in later versions they can. |
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328 // %%% Let's phase out the old is_klass_reference. |
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329 bool is_klass_reference(constantPoolHandle cp, int index) { |
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330 return ((LinkWellKnownClasses || EnableInvokeDynamic) |
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331 ? cp->tag_at(index).is_klass_or_reference() |
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332 : cp->tag_at(index).is_klass_reference()); |
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333 } |
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334 |
0 | 335 public: |
336 // Constructor | |
337 ClassFileParser(ClassFileStream* st) { set_stream(st); } | |
338 | |
339 // Parse .class file and return new klassOop. The klassOop is not hooked up | |
340 // to the system dictionary or any other structures, so a .class file can | |
341 // be loaded several times if desired. | |
342 // The system dictionary hookup is done by the caller. | |
343 // | |
344 // "parsed_name" is updated by this method, and is the name found | |
345 // while parsing the stream. | |
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346 instanceKlassHandle parseClassFile(Symbol* name, |
0 | 347 Handle class_loader, |
348 Handle protection_domain, | |
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349 TempNewSymbol& parsed_name, |
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350 bool verify, |
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351 TRAPS) { |
710 | 352 KlassHandle no_host_klass; |
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353 return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD); |
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354 } |
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355 instanceKlassHandle parseClassFile(Symbol* name, |
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356 Handle class_loader, |
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357 Handle protection_domain, |
710 | 358 KlassHandle host_klass, |
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359 GrowableArray<Handle>* cp_patches, |
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360 TempNewSymbol& parsed_name, |
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361 bool verify, |
0 | 362 TRAPS); |
363 | |
364 // Verifier checks | |
365 static void check_super_class_access(instanceKlassHandle this_klass, TRAPS); | |
366 static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS); | |
367 static void check_final_method_override(instanceKlassHandle this_klass, TRAPS); | |
368 static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS); | |
369 }; | |
1972 | 370 |
371 #endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP |