Mercurial > hg > graal-jvmci-8
comparison src/share/vm/classfile/verifier.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ad6585fd4087 |
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1 /* | |
2 * Copyright 1998-2006 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 */ | |
24 | |
25 // The verifier class | |
26 class Verifier : AllStatic { | |
27 public: | |
28 enum { STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50 }; | |
29 typedef enum { ThrowException, NoException } Mode; | |
30 | |
31 /** | |
32 * Verify the bytecodes for a class. If 'throw_exception' is true | |
33 * then the appropriate VerifyError or ClassFormatError will be thrown. | |
34 * Otherwise, no exception is thrown and the return indicates the | |
35 * error. | |
36 */ | |
37 static bool verify(instanceKlassHandle klass, Mode mode, TRAPS); | |
38 | |
39 // Return false if the class is loaded by the bootstrap loader. | |
40 static bool should_verify_for(oop class_loader); | |
41 | |
42 // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. | |
43 static bool relax_verify_for(oop class_loader); | |
44 | |
45 private: | |
46 static bool is_eligible_for_verification(instanceKlassHandle klass); | |
47 static symbolHandle inference_verify( | |
48 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); | |
49 }; | |
50 | |
51 class RawBytecodeStream; | |
52 class StackMapFrame; | |
53 class StackMapTable; | |
54 | |
55 // Summary of verifier's memory usage: | |
56 // StackMapTable is stack allocated. | |
57 // StackMapFrame are resource allocated. There is one ResourceMark | |
58 // for each method. | |
59 // There is one mutable StackMapFrame (current_frame) which is updated | |
60 // by abstract bytecode interpretation. frame_in_exception_handler() returns | |
61 // a frame that has a mutable one-item stack (ready for pushing the | |
62 // catch type exception object). All the other StackMapFrame's | |
63 // are immutable (including their locals and stack arrays) after | |
64 // their constructions. | |
65 // locals/stack arrays in StackMapFrame are resource allocated. | |
66 // locals/stack arrays can be shared between StackMapFrame's, except | |
67 // the mutable StackMapFrame (current_frame). | |
68 // Care needs to be taken to make sure resource objects don't outlive | |
69 // the lifetime of their ResourceMark. | |
70 | |
71 // These macros are used similarly to CHECK macros but also check | |
72 // the status of the verifier and return if that has an error. | |
73 #define CHECK_VERIFY(verifier) \ | |
74 CHECK); if ((verifier)->has_error()) return; (0 | |
75 #define CHECK_VERIFY_(verifier, result) \ | |
76 CHECK_(result)); if ((verifier)->has_error()) return (result); (0 | |
77 | |
78 // A new instance of this class is created for each class being verified | |
79 class ClassVerifier : public StackObj { | |
80 private: | |
81 Thread* _thread; | |
82 symbolHandle _exception_type; | |
83 char* _message; | |
84 size_t _message_buffer_len; | |
85 | |
86 void verify_method(methodHandle method, TRAPS); | |
87 char* generate_code_data(methodHandle m, u4 code_length, TRAPS); | |
88 void verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS); | |
89 void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); | |
90 | |
91 VerificationType cp_ref_index_to_type( | |
92 int index, constantPoolHandle cp, TRAPS) { | |
93 return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); | |
94 } | |
95 | |
96 bool is_protected_access( | |
97 instanceKlassHandle this_class, klassOop target_class, | |
98 symbolOop field_name, symbolOop field_sig, bool is_method); | |
99 | |
100 void verify_cp_index(constantPoolHandle cp, int index, TRAPS); | |
101 void verify_cp_type( | |
102 int index, constantPoolHandle cp, unsigned int types, TRAPS); | |
103 void verify_cp_class_type(int index, constantPoolHandle cp, TRAPS); | |
104 | |
105 u2 verify_stackmap_table( | |
106 u2 stackmap_index, u2 bci, StackMapFrame* current_frame, | |
107 StackMapTable* stackmap_table, bool no_control_flow, TRAPS); | |
108 | |
109 void verify_exception_handler_targets( | |
110 u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
111 StackMapTable* stackmap_table, TRAPS); | |
112 | |
113 void verify_ldc( | |
114 int opcode, u2 index, StackMapFrame *current_frame, | |
115 constantPoolHandle cp, u2 bci, TRAPS); | |
116 | |
117 void verify_switch( | |
118 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
119 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); | |
120 | |
121 void verify_field_instructions( | |
122 RawBytecodeStream* bcs, StackMapFrame* current_frame, | |
123 constantPoolHandle cp, TRAPS); | |
124 | |
125 void verify_invoke_init( | |
126 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
127 StackMapFrame* current_frame, u4 code_length, bool* this_uninit, | |
128 constantPoolHandle cp, TRAPS); | |
129 | |
130 void verify_invoke_instructions( | |
131 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
132 bool* this_uninit, VerificationType return_type, | |
133 constantPoolHandle cp, TRAPS); | |
134 | |
135 VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); | |
136 void verify_anewarray( | |
137 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS); | |
138 void verify_return_value( | |
139 VerificationType return_type, VerificationType type, u2 offset, TRAPS); | |
140 | |
141 void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); | |
142 void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); | |
143 void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); | |
144 void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); | |
145 void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); | |
146 void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); | |
147 void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
148 void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
149 void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
150 void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); | |
151 void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); | |
152 | |
153 bool name_in_supers(symbolOop ref_name, instanceKlassHandle current); | |
154 | |
155 instanceKlassHandle _klass; // the class being verified | |
156 methodHandle _method; // current method being verified | |
157 VerificationType _this_type; // the verification type of the current class | |
158 | |
159 public: | |
160 enum { | |
161 BYTECODE_OFFSET = 1, | |
162 NEW_OFFSET = 2 | |
163 }; | |
164 | |
165 // constructor | |
166 ClassVerifier(instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); | |
167 | |
168 // destructor | |
169 ~ClassVerifier(); | |
170 | |
171 Thread* thread() { return _thread; } | |
172 methodHandle method() { return _method; } | |
173 instanceKlassHandle current_class() const { return _klass; } | |
174 VerificationType current_type() const { return _this_type; } | |
175 | |
176 // Verifies the class. If a verify or class file format error occurs, | |
177 // the '_exception_name' symbols will set to the exception name and | |
178 // the message_buffer will be filled in with the exception message. | |
179 void verify_class(TRAPS); | |
180 | |
181 // Return status modes | |
182 symbolHandle result() const { return _exception_type; } | |
183 bool has_error() const { return !(result().is_null()); } | |
184 | |
185 // Called when verify or class format errors are encountered. | |
186 // May throw an exception based upon the mode. | |
187 void verify_error(u2 offset, const char* fmt, ...); | |
188 void verify_error(const char* fmt, ...); | |
189 void class_format_error(const char* fmt, ...); | |
190 void format_error_message(const char* fmt, int offset, va_list args); | |
191 | |
192 klassOop load_class(symbolHandle name, TRAPS); | |
193 | |
194 int change_sig_to_verificationType( | |
195 SignatureStream* sig_type, VerificationType* inference_type, TRAPS); | |
196 | |
197 VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { | |
198 return VerificationType::reference_type( | |
199 symbolHandle(THREAD, cp->klass_name_at(index))); | |
200 } | |
201 | |
202 static bool _verify_verbose; // for debugging | |
203 }; | |
204 | |
205 inline int ClassVerifier::change_sig_to_verificationType( | |
206 SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { | |
207 BasicType bt = sig_type->type(); | |
208 switch (bt) { | |
209 case T_OBJECT: | |
210 case T_ARRAY: | |
211 { | |
212 symbolOop name = sig_type->as_symbol(CHECK_0); | |
213 *inference_type = | |
214 VerificationType::reference_type(symbolHandle(THREAD, name)); | |
215 return 1; | |
216 } | |
217 case T_LONG: | |
218 *inference_type = VerificationType::long_type(); | |
219 *++inference_type = VerificationType::long2_type(); | |
220 return 2; | |
221 case T_DOUBLE: | |
222 *inference_type = VerificationType::double_type(); | |
223 *++inference_type = VerificationType::double2_type(); | |
224 return 2; | |
225 case T_INT: | |
226 case T_BOOLEAN: | |
227 case T_BYTE: | |
228 case T_CHAR: | |
229 case T_SHORT: | |
230 *inference_type = VerificationType::integer_type(); | |
231 return 1; | |
232 case T_FLOAT: | |
233 *inference_type = VerificationType::float_type(); | |
234 return 1; | |
235 default: | |
236 ShouldNotReachHere(); | |
237 return 1; | |
238 } | |
239 } |