Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.hpp @ 9093:cd22923e7ca7
removed unnecessary code
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 12 Apr 2013 21:35:27 +0200 |
parents | da91efe96a93 |
children | 92ef81e2f571 |
rev | line source |
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0 | 1 /* |
6605 | 2 * Copyright (c) 1998, 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_VERIFIER_HPP |
26 #define SHARE_VM_CLASSFILE_VERIFIER_HPP | |
27 | |
28 #include "classfile/verificationType.hpp" | |
29 #include "memory/gcLocker.hpp" | |
30 #include "oops/klass.hpp" | |
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31 #include "oops/method.hpp" |
1972 | 32 #include "runtime/handles.hpp" |
33 #include "utilities/exceptions.hpp" | |
34 | |
0 | 35 // The verifier class |
36 class Verifier : AllStatic { | |
37 public: | |
1602 | 38 enum { |
39 STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50, | |
40 INVOKEDYNAMIC_MAJOR_VERSION = 51 | |
41 }; | |
0 | 42 typedef enum { ThrowException, NoException } Mode; |
43 | |
44 /** | |
45 * Verify the bytecodes for a class. If 'throw_exception' is true | |
46 * then the appropriate VerifyError or ClassFormatError will be thrown. | |
47 * Otherwise, no exception is thrown and the return indicates the | |
48 * error. | |
49 */ | |
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50 static bool verify(instanceKlassHandle klass, Mode mode, bool should_verify_class, TRAPS); |
0 | 51 |
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52 // Return false if the class is loaded by the bootstrap loader, |
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53 // or if defineClass was called requesting skipping verification |
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54 // -Xverify:all/none override this value |
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55 static bool should_verify_for(oop class_loader, bool should_verify_class); |
0 | 56 |
57 // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. | |
58 static bool relax_verify_for(oop class_loader); | |
59 | |
60 private: | |
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61 static bool is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class); |
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62 static Symbol* inference_verify( |
0 | 63 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); |
64 }; | |
65 | |
66 class RawBytecodeStream; | |
67 class StackMapFrame; | |
68 class StackMapTable; | |
69 | |
70 // Summary of verifier's memory usage: | |
71 // StackMapTable is stack allocated. | |
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72 // StackMapFrame are resource allocated. There is only one ResourceMark |
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73 // for each class verification, which is created at the top level. |
0 | 74 // There is one mutable StackMapFrame (current_frame) which is updated |
75 // by abstract bytecode interpretation. frame_in_exception_handler() returns | |
76 // a frame that has a mutable one-item stack (ready for pushing the | |
77 // catch type exception object). All the other StackMapFrame's | |
78 // are immutable (including their locals and stack arrays) after | |
79 // their constructions. | |
80 // locals/stack arrays in StackMapFrame are resource allocated. | |
81 // locals/stack arrays can be shared between StackMapFrame's, except | |
82 // the mutable StackMapFrame (current_frame). | |
83 | |
84 // These macros are used similarly to CHECK macros but also check | |
85 // the status of the verifier and return if that has an error. | |
86 #define CHECK_VERIFY(verifier) \ | |
87 CHECK); if ((verifier)->has_error()) return; (0 | |
88 #define CHECK_VERIFY_(verifier, result) \ | |
89 CHECK_(result)); if ((verifier)->has_error()) return (result); (0 | |
90 | |
6605 | 91 class TypeOrigin VALUE_OBJ_CLASS_SPEC { |
92 private: | |
93 typedef enum { | |
94 CF_LOCALS, // Comes from the current frame locals | |
95 CF_STACK, // Comes from the current frame expression stack | |
96 SM_LOCALS, // Comes from stackmap locals | |
97 SM_STACK, // Comes from stackmap expression stack | |
98 CONST_POOL, // Comes from the constant pool | |
99 SIG, // Comes from method signature | |
100 IMPLICIT, // Comes implicitly from code or context | |
101 BAD_INDEX, // No type, but the index is bad | |
102 FRAME_ONLY, // No type, context just contains the frame | |
103 NONE | |
104 } Origin; | |
105 | |
106 Origin _origin; | |
107 u2 _index; // local, stack, or constant pool index | |
108 StackMapFrame* _frame; // source frame if CF or SM | |
109 VerificationType _type; // The actual type | |
110 | |
111 TypeOrigin( | |
112 Origin origin, u2 index, StackMapFrame* frame, VerificationType type) | |
113 : _origin(origin), _index(index), _frame(frame), _type(type) {} | |
114 | |
115 public: | |
116 TypeOrigin() : _origin(NONE), _index(0), _frame(NULL) {} | |
117 | |
118 static TypeOrigin null(); | |
119 static TypeOrigin local(u2 index, StackMapFrame* frame); | |
120 static TypeOrigin stack(u2 index, StackMapFrame* frame); | |
121 static TypeOrigin sm_local(u2 index, StackMapFrame* frame); | |
122 static TypeOrigin sm_stack(u2 index, StackMapFrame* frame); | |
123 static TypeOrigin cp(u2 index, VerificationType vt); | |
124 static TypeOrigin signature(VerificationType vt); | |
125 static TypeOrigin bad_index(u2 index); | |
126 static TypeOrigin implicit(VerificationType t); | |
127 static TypeOrigin frame(StackMapFrame* frame); | |
128 | |
129 void reset_frame(); | |
130 void details(outputStream* ss) const; | |
131 void print_frame(outputStream* ss) const; | |
132 const StackMapFrame* frame() const { return _frame; } | |
133 bool is_valid() const { return _origin != NONE; } | |
134 u2 index() const { return _index; } | |
135 | |
136 #ifdef ASSERT | |
137 void print_on(outputStream* str) const; | |
138 #endif | |
139 }; | |
140 | |
141 class ErrorContext VALUE_OBJ_CLASS_SPEC { | |
142 private: | |
143 typedef enum { | |
144 INVALID_BYTECODE, // There was a problem with the bytecode | |
145 WRONG_TYPE, // Type value was not as expected | |
146 FLAGS_MISMATCH, // Frame flags are not assignable | |
147 BAD_CP_INDEX, // Invalid constant pool index | |
148 BAD_LOCAL_INDEX, // Invalid local index | |
149 LOCALS_SIZE_MISMATCH, // Frames have differing local counts | |
150 STACK_SIZE_MISMATCH, // Frames have different stack sizes | |
151 STACK_OVERFLOW, // Attempt to push onto a full expression stack | |
152 STACK_UNDERFLOW, // Attempt to pop and empty expression stack | |
153 MISSING_STACKMAP, // No stackmap for this location and there should be | |
154 BAD_STACKMAP, // Format error in stackmap | |
155 NO_FAULT, // No error | |
156 UNKNOWN | |
157 } FaultType; | |
158 | |
159 int _bci; | |
160 FaultType _fault; | |
161 TypeOrigin _type; | |
162 TypeOrigin _expected; | |
163 | |
164 ErrorContext(int bci, FaultType fault) : | |
165 _bci(bci), _fault(fault) {} | |
166 ErrorContext(int bci, FaultType fault, TypeOrigin type) : | |
167 _bci(bci), _fault(fault), _type(type) {} | |
168 ErrorContext(int bci, FaultType fault, TypeOrigin type, TypeOrigin exp) : | |
169 _bci(bci), _fault(fault), _type(type), _expected(exp) {} | |
170 | |
171 public: | |
172 ErrorContext() : _bci(-1), _fault(NO_FAULT) {} | |
173 | |
174 static ErrorContext bad_code(u2 bci) { | |
175 return ErrorContext(bci, INVALID_BYTECODE); | |
176 } | |
177 static ErrorContext bad_type(u2 bci, TypeOrigin type) { | |
178 return ErrorContext(bci, WRONG_TYPE, type); | |
179 } | |
180 static ErrorContext bad_type(u2 bci, TypeOrigin type, TypeOrigin exp) { | |
181 return ErrorContext(bci, WRONG_TYPE, type, exp); | |
182 } | |
183 static ErrorContext bad_flags(u2 bci, StackMapFrame* frame) { | |
184 return ErrorContext(bci, FLAGS_MISMATCH, TypeOrigin::frame(frame)); | |
185 } | |
186 static ErrorContext bad_flags(u2 bci, StackMapFrame* cur, StackMapFrame* sm) { | |
187 return ErrorContext(bci, FLAGS_MISMATCH, | |
188 TypeOrigin::frame(cur), TypeOrigin::frame(sm)); | |
189 } | |
190 static ErrorContext bad_cp_index(u2 bci, u2 index) { | |
191 return ErrorContext(bci, BAD_CP_INDEX, TypeOrigin::bad_index(index)); | |
192 } | |
193 static ErrorContext bad_local_index(u2 bci, u2 index) { | |
194 return ErrorContext(bci, BAD_LOCAL_INDEX, TypeOrigin::bad_index(index)); | |
195 } | |
196 static ErrorContext locals_size_mismatch( | |
197 u2 bci, StackMapFrame* frame0, StackMapFrame* frame1) { | |
198 return ErrorContext(bci, LOCALS_SIZE_MISMATCH, | |
199 TypeOrigin::frame(frame0), TypeOrigin::frame(frame1)); | |
200 } | |
201 static ErrorContext stack_size_mismatch( | |
202 u2 bci, StackMapFrame* frame0, StackMapFrame* frame1) { | |
203 return ErrorContext(bci, STACK_SIZE_MISMATCH, | |
204 TypeOrigin::frame(frame0), TypeOrigin::frame(frame1)); | |
205 } | |
206 static ErrorContext stack_overflow(u2 bci, StackMapFrame* frame) { | |
207 return ErrorContext(bci, STACK_OVERFLOW, TypeOrigin::frame(frame)); | |
208 } | |
209 static ErrorContext stack_underflow(u2 bci, StackMapFrame* frame) { | |
210 return ErrorContext(bci, STACK_UNDERFLOW, TypeOrigin::frame(frame)); | |
211 } | |
212 static ErrorContext missing_stackmap(u2 bci) { | |
213 return ErrorContext(bci, MISSING_STACKMAP); | |
214 } | |
215 static ErrorContext bad_stackmap(int index, StackMapFrame* frame) { | |
216 return ErrorContext(0, BAD_STACKMAP, TypeOrigin::frame(frame)); | |
217 } | |
218 | |
219 bool is_valid() const { return _fault != NO_FAULT; } | |
220 int bci() const { return _bci; } | |
221 | |
222 void reset_frames() { | |
223 _type.reset_frame(); | |
224 _expected.reset_frame(); | |
225 } | |
226 | |
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227 void details(outputStream* ss, Method* method) const; |
6605 | 228 |
229 #ifdef ASSERT | |
230 void print_on(outputStream* str) const { | |
231 str->print("error_context(%d, %d,", _bci, _fault); | |
232 _type.print_on(str); | |
233 str->print(","); | |
234 _expected.print_on(str); | |
235 str->print(")"); | |
236 } | |
237 #endif | |
238 | |
239 private: | |
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240 void location_details(outputStream* ss, Method* method) const; |
6605 | 241 void reason_details(outputStream* ss) const; |
242 void frame_details(outputStream* ss) const; | |
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243 void bytecode_details(outputStream* ss, Method* method) const; |
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244 void handler_details(outputStream* ss, Method* method) const; |
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245 void stackmap_details(outputStream* ss, Method* method) const; |
6605 | 246 }; |
247 | |
0 | 248 // A new instance of this class is created for each class being verified |
249 class ClassVerifier : public StackObj { | |
250 private: | |
251 Thread* _thread; | |
6605 | 252 GrowableArray<Symbol*>* _symbols; // keep a list of symbols created |
253 | |
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254 Symbol* _exception_type; |
0 | 255 char* _message; |
6605 | 256 |
257 ErrorContext _error_context; // contains information about an error | |
0 | 258 |
259 void verify_method(methodHandle method, TRAPS); | |
260 char* generate_code_data(methodHandle m, u4 code_length, TRAPS); | |
6605 | 261 void verify_exception_handler_table(u4 code_length, char* code_data, |
262 int& min, int& max, TRAPS); | |
0 | 263 void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); |
264 | |
265 VerificationType cp_ref_index_to_type( | |
266 int index, constantPoolHandle cp, TRAPS) { | |
267 return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); | |
268 } | |
269 | |
270 bool is_protected_access( | |
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271 instanceKlassHandle this_class, Klass* target_class, |
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272 Symbol* field_name, Symbol* field_sig, bool is_method); |
0 | 273 |
6605 | 274 void verify_cp_index(u2 bci, constantPoolHandle cp, int index, TRAPS); |
275 void verify_cp_type(u2 bci, int index, constantPoolHandle cp, | |
276 unsigned int types, TRAPS); | |
277 void verify_cp_class_type(u2 bci, int index, constantPoolHandle cp, TRAPS); | |
0 | 278 |
279 u2 verify_stackmap_table( | |
280 u2 stackmap_index, u2 bci, StackMapFrame* current_frame, | |
281 StackMapTable* stackmap_table, bool no_control_flow, TRAPS); | |
282 | |
283 void verify_exception_handler_targets( | |
284 u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
285 StackMapTable* stackmap_table, TRAPS); | |
286 | |
287 void verify_ldc( | |
288 int opcode, u2 index, StackMapFrame *current_frame, | |
289 constantPoolHandle cp, u2 bci, TRAPS); | |
290 | |
291 void verify_switch( | |
292 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
293 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); | |
294 | |
295 void verify_field_instructions( | |
296 RawBytecodeStream* bcs, StackMapFrame* current_frame, | |
297 constantPoolHandle cp, TRAPS); | |
298 | |
299 void verify_invoke_init( | |
6605 | 300 RawBytecodeStream* bcs, u2 ref_index, VerificationType ref_class_type, |
0 | 301 StackMapFrame* current_frame, u4 code_length, bool* this_uninit, |
302 constantPoolHandle cp, TRAPS); | |
303 | |
304 void verify_invoke_instructions( | |
305 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
306 bool* this_uninit, VerificationType return_type, | |
307 constantPoolHandle cp, TRAPS); | |
308 | |
309 VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); | |
6605 | 310 void verify_anewarray(u2 bci, u2 index, constantPoolHandle cp, |
311 StackMapFrame* current_frame, TRAPS); | |
0 | 312 void verify_return_value( |
6605 | 313 VerificationType return_type, VerificationType type, u2 offset, |
314 StackMapFrame* current_frame, TRAPS); | |
0 | 315 |
316 void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); | |
317 void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); | |
318 void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); | |
319 void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); | |
320 void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); | |
321 void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); | |
322 void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
323 void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
324 void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
325 void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); | |
326 void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); | |
327 | |
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328 bool name_in_supers(Symbol* ref_name, instanceKlassHandle current); |
0 | 329 |
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330 VerificationType object_type() const; |
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331 |
0 | 332 instanceKlassHandle _klass; // the class being verified |
333 methodHandle _method; // current method being verified | |
334 VerificationType _this_type; // the verification type of the current class | |
335 | |
1570 | 336 // Some recursive calls from the verifier to the name resolver |
337 // can cause the current class to be re-verified and rewritten. | |
338 // If this happens, the original verification should not continue, | |
339 // because constant pool indexes will have changed. | |
340 // The rewriter is preceded by the verifier. If the verifier throws | |
341 // an error, rewriting is prevented. Also, rewriting always precedes | |
342 // bytecode execution or compilation. Thus, is_rewritten implies | |
343 // that a class has been verified and prepared for execution. | |
344 bool was_recursively_verified() { return _klass->is_rewritten(); } | |
345 | |
0 | 346 public: |
347 enum { | |
348 BYTECODE_OFFSET = 1, | |
349 NEW_OFFSET = 2 | |
350 }; | |
351 | |
352 // constructor | |
6605 | 353 ClassVerifier(instanceKlassHandle klass, TRAPS); |
0 | 354 |
355 // destructor | |
356 ~ClassVerifier(); | |
357 | |
358 Thread* thread() { return _thread; } | |
359 methodHandle method() { return _method; } | |
360 instanceKlassHandle current_class() const { return _klass; } | |
361 VerificationType current_type() const { return _this_type; } | |
362 | |
363 // Verifies the class. If a verify or class file format error occurs, | |
364 // the '_exception_name' symbols will set to the exception name and | |
365 // the message_buffer will be filled in with the exception message. | |
366 void verify_class(TRAPS); | |
367 | |
368 // Return status modes | |
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369 Symbol* result() const { return _exception_type; } |
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370 bool has_error() const { return result() != NULL; } |
6605 | 371 char* exception_message() { |
372 stringStream ss; | |
373 ss.print(_message); | |
374 _error_context.details(&ss, _method()); | |
375 return ss.as_string(); | |
376 } | |
0 | 377 |
378 // Called when verify or class format errors are encountered. | |
379 // May throw an exception based upon the mode. | |
6605 | 380 void verify_error(ErrorContext ctx, const char* fmt, ...); |
0 | 381 void class_format_error(const char* fmt, ...); |
382 | |
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383 Klass* load_class(Symbol* name, TRAPS); |
0 | 384 |
385 int change_sig_to_verificationType( | |
386 SignatureStream* sig_type, VerificationType* inference_type, TRAPS); | |
387 | |
388 VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { | |
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389 return VerificationType::reference_type(cp->klass_name_at(index)); |
0 | 390 } |
391 | |
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392 // Keep a list of temporary symbols created during verification because |
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393 // their reference counts need to be decrememented when the verifier object |
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394 // goes out of scope. Since these symbols escape the scope in which they're |
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395 // created, we can't use a TempNewSymbol. |
6605 | 396 Symbol* create_temporary_symbol( |
397 const Symbol* s, int begin, int end, TRAPS); | |
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398 Symbol* create_temporary_symbol(const char *s, int length, TRAPS); |
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399 |
6605 | 400 TypeOrigin ref_ctx(const char* str, TRAPS); |
0 | 401 }; |
402 | |
403 inline int ClassVerifier::change_sig_to_verificationType( | |
404 SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { | |
405 BasicType bt = sig_type->type(); | |
406 switch (bt) { | |
407 case T_OBJECT: | |
408 case T_ARRAY: | |
409 { | |
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410 Symbol* name = sig_type->as_symbol(CHECK_0); |
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411 // Create another symbol to save as signature stream unreferences |
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412 // this symbol. |
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413 Symbol* name_copy = |
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414 create_temporary_symbol(name, 0, name->utf8_length(), CHECK_0); |
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415 assert(name_copy == name, "symbols don't match"); |
0 | 416 *inference_type = |
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417 VerificationType::reference_type(name_copy); |
0 | 418 return 1; |
419 } | |
420 case T_LONG: | |
421 *inference_type = VerificationType::long_type(); | |
422 *++inference_type = VerificationType::long2_type(); | |
423 return 2; | |
424 case T_DOUBLE: | |
425 *inference_type = VerificationType::double_type(); | |
426 *++inference_type = VerificationType::double2_type(); | |
427 return 2; | |
428 case T_INT: | |
429 case T_BOOLEAN: | |
430 case T_BYTE: | |
431 case T_CHAR: | |
432 case T_SHORT: | |
433 *inference_type = VerificationType::integer_type(); | |
434 return 1; | |
435 case T_FLOAT: | |
436 *inference_type = VerificationType::float_type(); | |
437 return 1; | |
438 default: | |
439 ShouldNotReachHere(); | |
440 return 1; | |
441 } | |
442 } | |
1972 | 443 |
444 #endif // SHARE_VM_CLASSFILE_VERIFIER_HPP |