Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/verifier.hpp @ 1751:2528b5bd749c
6980262: Memory leak when exception is thrown in static initializer
Summary: Use resource memory instead of c-heap for the exception message
Reviewed-by: phh, jmasa
author | kamg |
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date | Fri, 27 Aug 2010 15:05:28 -0400 |
parents | 136b78722a08 |
children | 1070423b51f3 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2006, 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 | |
25 // The verifier class | |
26 class Verifier : AllStatic { | |
27 public: | |
1602 | 28 enum { |
29 STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50, | |
30 INVOKEDYNAMIC_MAJOR_VERSION = 51 | |
31 }; | |
0 | 32 typedef enum { ThrowException, NoException } Mode; |
33 | |
34 /** | |
35 * Verify the bytecodes for a class. If 'throw_exception' is true | |
36 * then the appropriate VerifyError or ClassFormatError will be thrown. | |
37 * Otherwise, no exception is thrown and the return indicates the | |
38 * error. | |
39 */ | |
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40 static bool verify(instanceKlassHandle klass, Mode mode, bool should_verify_class, TRAPS); |
0 | 41 |
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42 // Return false if the class is loaded by the bootstrap loader, |
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43 // or if defineClass was called requesting skipping verification |
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44 // -Xverify:all/none override this value |
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45 static bool should_verify_for(oop class_loader, bool should_verify_class); |
0 | 46 |
47 // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. | |
48 static bool relax_verify_for(oop class_loader); | |
49 | |
50 private: | |
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51 static bool is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class); |
0 | 52 static symbolHandle inference_verify( |
53 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); | |
54 }; | |
55 | |
56 class RawBytecodeStream; | |
57 class StackMapFrame; | |
58 class StackMapTable; | |
59 | |
60 // Summary of verifier's memory usage: | |
61 // StackMapTable is stack allocated. | |
62 // StackMapFrame are resource allocated. There is one ResourceMark | |
63 // for each method. | |
64 // There is one mutable StackMapFrame (current_frame) which is updated | |
65 // by abstract bytecode interpretation. frame_in_exception_handler() returns | |
66 // a frame that has a mutable one-item stack (ready for pushing the | |
67 // catch type exception object). All the other StackMapFrame's | |
68 // are immutable (including their locals and stack arrays) after | |
69 // their constructions. | |
70 // locals/stack arrays in StackMapFrame are resource allocated. | |
71 // locals/stack arrays can be shared between StackMapFrame's, except | |
72 // the mutable StackMapFrame (current_frame). | |
73 // Care needs to be taken to make sure resource objects don't outlive | |
74 // the lifetime of their ResourceMark. | |
75 | |
76 // These macros are used similarly to CHECK macros but also check | |
77 // the status of the verifier and return if that has an error. | |
78 #define CHECK_VERIFY(verifier) \ | |
79 CHECK); if ((verifier)->has_error()) return; (0 | |
80 #define CHECK_VERIFY_(verifier, result) \ | |
81 CHECK_(result)); if ((verifier)->has_error()) return (result); (0 | |
82 | |
83 // A new instance of this class is created for each class being verified | |
84 class ClassVerifier : public StackObj { | |
85 private: | |
86 Thread* _thread; | |
87 symbolHandle _exception_type; | |
88 char* _message; | |
89 size_t _message_buffer_len; | |
90 | |
91 void verify_method(methodHandle method, TRAPS); | |
92 char* generate_code_data(methodHandle m, u4 code_length, TRAPS); | |
93 void verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS); | |
94 void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); | |
95 | |
96 VerificationType cp_ref_index_to_type( | |
97 int index, constantPoolHandle cp, TRAPS) { | |
98 return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); | |
99 } | |
100 | |
101 bool is_protected_access( | |
102 instanceKlassHandle this_class, klassOop target_class, | |
103 symbolOop field_name, symbolOop field_sig, bool is_method); | |
104 | |
105 void verify_cp_index(constantPoolHandle cp, int index, TRAPS); | |
106 void verify_cp_type( | |
107 int index, constantPoolHandle cp, unsigned int types, TRAPS); | |
108 void verify_cp_class_type(int index, constantPoolHandle cp, TRAPS); | |
109 | |
110 u2 verify_stackmap_table( | |
111 u2 stackmap_index, u2 bci, StackMapFrame* current_frame, | |
112 StackMapTable* stackmap_table, bool no_control_flow, TRAPS); | |
113 | |
114 void verify_exception_handler_targets( | |
115 u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
116 StackMapTable* stackmap_table, TRAPS); | |
117 | |
118 void verify_ldc( | |
119 int opcode, u2 index, StackMapFrame *current_frame, | |
120 constantPoolHandle cp, u2 bci, TRAPS); | |
121 | |
122 void verify_switch( | |
123 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
124 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); | |
125 | |
126 void verify_field_instructions( | |
127 RawBytecodeStream* bcs, StackMapFrame* current_frame, | |
128 constantPoolHandle cp, TRAPS); | |
129 | |
130 void verify_invoke_init( | |
131 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
132 StackMapFrame* current_frame, u4 code_length, bool* this_uninit, | |
133 constantPoolHandle cp, TRAPS); | |
134 | |
135 void verify_invoke_instructions( | |
136 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
137 bool* this_uninit, VerificationType return_type, | |
138 constantPoolHandle cp, TRAPS); | |
139 | |
140 VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); | |
141 void verify_anewarray( | |
142 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS); | |
143 void verify_return_value( | |
144 VerificationType return_type, VerificationType type, u2 offset, TRAPS); | |
145 | |
146 void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); | |
147 void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); | |
148 void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); | |
149 void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); | |
150 void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); | |
151 void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); | |
152 void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
153 void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
154 void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
155 void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); | |
156 void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); | |
157 | |
158 bool name_in_supers(symbolOop ref_name, instanceKlassHandle current); | |
159 | |
160 instanceKlassHandle _klass; // the class being verified | |
161 methodHandle _method; // current method being verified | |
162 VerificationType _this_type; // the verification type of the current class | |
163 | |
1570 | 164 // Some recursive calls from the verifier to the name resolver |
165 // can cause the current class to be re-verified and rewritten. | |
166 // If this happens, the original verification should not continue, | |
167 // because constant pool indexes will have changed. | |
168 // The rewriter is preceded by the verifier. If the verifier throws | |
169 // an error, rewriting is prevented. Also, rewriting always precedes | |
170 // bytecode execution or compilation. Thus, is_rewritten implies | |
171 // that a class has been verified and prepared for execution. | |
172 bool was_recursively_verified() { return _klass->is_rewritten(); } | |
173 | |
0 | 174 public: |
175 enum { | |
176 BYTECODE_OFFSET = 1, | |
177 NEW_OFFSET = 2 | |
178 }; | |
179 | |
180 // constructor | |
181 ClassVerifier(instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); | |
182 | |
183 // destructor | |
184 ~ClassVerifier(); | |
185 | |
186 Thread* thread() { return _thread; } | |
187 methodHandle method() { return _method; } | |
188 instanceKlassHandle current_class() const { return _klass; } | |
189 VerificationType current_type() const { return _this_type; } | |
190 | |
191 // Verifies the class. If a verify or class file format error occurs, | |
192 // the '_exception_name' symbols will set to the exception name and | |
193 // the message_buffer will be filled in with the exception message. | |
194 void verify_class(TRAPS); | |
195 | |
196 // Return status modes | |
197 symbolHandle result() const { return _exception_type; } | |
198 bool has_error() const { return !(result().is_null()); } | |
199 | |
200 // Called when verify or class format errors are encountered. | |
201 // May throw an exception based upon the mode. | |
202 void verify_error(u2 offset, const char* fmt, ...); | |
203 void verify_error(const char* fmt, ...); | |
204 void class_format_error(const char* fmt, ...); | |
205 void format_error_message(const char* fmt, int offset, va_list args); | |
206 | |
207 klassOop load_class(symbolHandle name, TRAPS); | |
208 | |
209 int change_sig_to_verificationType( | |
210 SignatureStream* sig_type, VerificationType* inference_type, TRAPS); | |
211 | |
212 VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { | |
213 return VerificationType::reference_type( | |
214 symbolHandle(THREAD, cp->klass_name_at(index))); | |
215 } | |
216 | |
217 static bool _verify_verbose; // for debugging | |
218 }; | |
219 | |
220 inline int ClassVerifier::change_sig_to_verificationType( | |
221 SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { | |
222 BasicType bt = sig_type->type(); | |
223 switch (bt) { | |
224 case T_OBJECT: | |
225 case T_ARRAY: | |
226 { | |
227 symbolOop name = sig_type->as_symbol(CHECK_0); | |
228 *inference_type = | |
229 VerificationType::reference_type(symbolHandle(THREAD, name)); | |
230 return 1; | |
231 } | |
232 case T_LONG: | |
233 *inference_type = VerificationType::long_type(); | |
234 *++inference_type = VerificationType::long2_type(); | |
235 return 2; | |
236 case T_DOUBLE: | |
237 *inference_type = VerificationType::double_type(); | |
238 *++inference_type = VerificationType::double2_type(); | |
239 return 2; | |
240 case T_INT: | |
241 case T_BOOLEAN: | |
242 case T_BYTE: | |
243 case T_CHAR: | |
244 case T_SHORT: | |
245 *inference_type = VerificationType::integer_type(); | |
246 return 1; | |
247 case T_FLOAT: | |
248 *inference_type = VerificationType::float_type(); | |
249 return 1; | |
250 default: | |
251 ShouldNotReachHere(); | |
252 return 1; | |
253 } | |
254 } |