Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/classfile/classFileParser.hpp@e5b0439ef4ae
src/share/vm/classfile/classFileParser.hpp
Wed, 08 Apr 2009 10:56:49 -0700
- author
- jrose
- date
- Wed, 08 Apr 2009 10:56:49 -0700
- changeset 1145
- e5b0439ef4ae
- parent 905
- ad8c8ca4ab0f
- child 1310
- 6a93908f268f
- permissions
- -rw-r--r--
6655638: dynamic languages need method handles
Summary: initial implementation, with known omissions (x86/64, sparc, compiler optim., c-oops, C++ interp.)
Reviewed-by: kvn, twisti, never
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
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 */
25 // Parser for for .class files
26 //
27 // The bytes describing the class file structure is read from a Stream object
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;
36 KlassHandle _host_klass;
37 GrowableArray<Handle>* _cp_patches; // overrides for CP entries
39 bool _has_finalizer;
40 bool _has_empty_finalizer;
41 bool _has_vanilla_constructor;
43 enum { fixed_buffer_size = 128 };
44 u_char linenumbertable_buffer[fixed_buffer_size];
46 ClassFileStream* _stream; // Actual input stream
48 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
50 // Accessors
51 ClassFileStream* stream() { return _stream; }
52 void set_stream(ClassFileStream* st) { _stream = st; }
54 // Constant pool parsing
55 void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS);
57 constantPoolHandle parse_constant_pool(TRAPS);
59 // Interface parsing
60 objArrayHandle parse_interfaces(constantPoolHandle cp,
61 int length,
62 Handle class_loader,
63 Handle protection_domain,
64 PerfTraceTime* vmtimer,
65 symbolHandle class_name,
66 TRAPS);
68 // Field parsing
69 void parse_field_attributes(constantPoolHandle cp, u2 attributes_count,
70 bool is_static, u2 signature_index,
71 u2* constantvalue_index_addr,
72 bool* is_synthetic_addr,
73 u2* generic_signature_index_addr,
74 typeArrayHandle* field_annotations, TRAPS);
75 typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface,
76 struct FieldAllocationCount *fac,
77 objArrayHandle* fields_annotations, TRAPS);
79 // Method parsing
80 methodHandle parse_method(constantPoolHandle cp, bool is_interface,
81 AccessFlags* promoted_flags,
82 typeArrayHandle* method_annotations,
83 typeArrayHandle* method_parameter_annotations,
84 typeArrayHandle* method_default_annotations,
85 TRAPS);
86 objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface,
87 AccessFlags* promoted_flags,
88 bool* has_final_method,
89 objArrayOop* methods_annotations_oop,
90 objArrayOop* methods_parameter_annotations_oop,
91 objArrayOop* methods_default_annotations_oop,
92 TRAPS);
93 typeArrayHandle sort_methods (objArrayHandle methods,
94 objArrayHandle methods_annotations,
95 objArrayHandle methods_parameter_annotations,
96 objArrayHandle methods_default_annotations,
97 TRAPS);
98 typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length,
99 constantPoolHandle cp, TRAPS);
100 void parse_linenumber_table(
101 u4 code_attribute_length, u4 code_length,
102 CompressedLineNumberWriteStream** write_stream, TRAPS);
103 u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length,
104 constantPoolHandle cp, u2* localvariable_table_length,
105 bool isLVTT, TRAPS);
106 u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length,
107 constantPoolHandle cp, TRAPS);
108 void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
109 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS);
110 typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS);
112 // Classfile attribute parsing
113 void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
114 void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
115 instanceKlassHandle k, int length, TRAPS);
116 u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp,
117 instanceKlassHandle k, TRAPS);
118 void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
119 void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
120 void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
122 // Annotations handling
123 typeArrayHandle assemble_annotations(u1* runtime_visible_annotations,
124 int runtime_visible_annotations_length,
125 u1* runtime_invisible_annotations,
126 int runtime_invisible_annotations_length, TRAPS);
128 // Final setup
129 int compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_count,
130 int first_nonstatic_oop_offset);
131 void fill_oop_maps(instanceKlassHandle k, int nonstatic_oop_map_count,
132 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length);
133 void set_precomputed_flags(instanceKlassHandle k);
134 objArrayHandle compute_transitive_interfaces(instanceKlassHandle super,
135 objArrayHandle local_ifs, TRAPS);
137 // Special handling for certain classes.
138 // Add the "discovered" field to java.lang.ref.Reference if
139 // it does not exist.
140 void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
141 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS);
142 // Adjust the field allocation counts for java.lang.Class to add
143 // fake fields.
144 void java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
145 FieldAllocationCount *fac_ptr, TRAPS);
146 // Adjust the next_nonstatic_oop_offset to place the fake fields
147 // before any Java fields.
148 void java_lang_Class_fix_post(int* next_nonstatic_oop_offset);
149 // Adjust the field allocation counts for java.dyn.MethodHandle to add
150 // a fake address (void*) field.
151 void java_dyn_MethodHandle_fix_pre(constantPoolHandle cp,
152 typeArrayHandle* fields_ptr,
153 FieldAllocationCount *fac_ptr, TRAPS);
155 // Format checker methods
156 void classfile_parse_error(const char* msg, TRAPS);
157 void classfile_parse_error(const char* msg, int index, TRAPS);
158 void classfile_parse_error(const char* msg, const char *name, TRAPS);
159 void classfile_parse_error(const char* msg, int index, const char *name, TRAPS);
160 inline void guarantee_property(bool b, const char* msg, TRAPS) {
161 if (!b) { classfile_parse_error(msg, CHECK); }
162 }
164 inline void assert_property(bool b, const char* msg, TRAPS) {
165 #ifdef ASSERT
166 if (!b) { fatal(msg); }
167 #endif
168 }
170 inline void check_property(bool property, const char* msg, int index, TRAPS) {
171 if (_need_verify) {
172 guarantee_property(property, msg, index, CHECK);
173 } else {
174 assert_property(property, msg, CHECK);
175 }
176 }
178 inline void check_property(bool property, const char* msg, TRAPS) {
179 if (_need_verify) {
180 guarantee_property(property, msg, CHECK);
181 } else {
182 assert_property(property, msg, CHECK);
183 }
184 }
186 inline void guarantee_property(bool b, const char* msg, int index, TRAPS) {
187 if (!b) { classfile_parse_error(msg, index, CHECK); }
188 }
189 inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) {
190 if (!b) { classfile_parse_error(msg, name, CHECK); }
191 }
192 inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) {
193 if (!b) { classfile_parse_error(msg, index, name, CHECK); }
194 }
196 bool is_supported_version(u2 major, u2 minor);
197 bool has_illegal_visibility(jint flags);
199 void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS);
200 void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS);
201 void verify_legal_class_name(symbolHandle name, TRAPS);
202 void verify_legal_field_name(symbolHandle name, TRAPS);
203 void verify_legal_method_name(symbolHandle name, TRAPS);
204 void verify_legal_field_signature(symbolHandle fieldname, symbolHandle signature, TRAPS);
205 int verify_legal_method_signature(symbolHandle methodname, symbolHandle signature, TRAPS);
206 void verify_legal_class_modifiers(jint flags, TRAPS);
207 void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS);
208 void verify_legal_method_modifiers(jint flags, bool is_interface, symbolHandle name, TRAPS);
209 bool verify_unqualified_name(char* name, unsigned int length, int type);
210 char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
211 char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
213 bool is_anonymous() {
214 assert(AnonymousClasses || _host_klass.is_null(), "");
215 return _host_klass.not_null();
216 }
217 bool has_cp_patch_at(int index) {
218 assert(AnonymousClasses, "");
219 assert(index >= 0, "oob");
220 return (_cp_patches != NULL
221 && index < _cp_patches->length()
222 && _cp_patches->adr_at(index)->not_null());
223 }
224 Handle cp_patch_at(int index) {
225 assert(has_cp_patch_at(index), "oob");
226 return _cp_patches->at(index);
227 }
228 Handle clear_cp_patch_at(int index) {
229 Handle patch = cp_patch_at(index);
230 _cp_patches->at_put(index, Handle());
231 assert(!has_cp_patch_at(index), "");
232 return patch;
233 }
234 void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
236 // Wrapper for constantTag.is_klass_[or_]reference.
237 // In older versions of the VM, klassOops cannot sneak into early phases of
238 // constant pool construction, but in later versions they can.
239 // %%% Let's phase out the old is_klass_reference.
240 bool is_klass_reference(constantPoolHandle cp, int index) {
241 return ((LinkWellKnownClasses || AnonymousClasses)
242 ? cp->tag_at(index).is_klass_or_reference()
243 : cp->tag_at(index).is_klass_reference());
244 }
246 public:
247 // Constructor
248 ClassFileParser(ClassFileStream* st) { set_stream(st); }
250 // Parse .class file and return new klassOop. The klassOop is not hooked up
251 // to the system dictionary or any other structures, so a .class file can
252 // be loaded several times if desired.
253 // The system dictionary hookup is done by the caller.
254 //
255 // "parsed_name" is updated by this method, and is the name found
256 // while parsing the stream.
257 instanceKlassHandle parseClassFile(symbolHandle name,
258 Handle class_loader,
259 Handle protection_domain,
260 symbolHandle& parsed_name,
261 TRAPS) {
262 KlassHandle no_host_klass;
263 return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, THREAD);
264 }
265 instanceKlassHandle parseClassFile(symbolHandle name,
266 Handle class_loader,
267 Handle protection_domain,
268 KlassHandle host_klass,
269 GrowableArray<Handle>* cp_patches,
270 symbolHandle& parsed_name,
271 TRAPS);
273 // Verifier checks
274 static void check_super_class_access(instanceKlassHandle this_klass, TRAPS);
275 static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS);
276 static void check_final_method_override(instanceKlassHandle this_klass, TRAPS);
277 static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS);
278 };
