Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.hpp @ 21167:ab451b6de9f8
Interop: introduce separate global language scope
author | Matthias Grimmer <grimmer@ssw.jku.at> |
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date | Thu, 30 Apr 2015 17:27:53 +0200 |
parents | 4b26b980ec8d |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2014, 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" |
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33 #include "utilities/growableArray.hpp" |
1972 | 34 #include "utilities/exceptions.hpp" |
35 | |
0 | 36 // The verifier class |
37 class Verifier : AllStatic { | |
38 public: | |
1602 | 39 enum { |
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40 STRICTER_ACCESS_CTRL_CHECK_VERSION = 49, |
1602 | 41 STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50, |
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42 INVOKEDYNAMIC_MAJOR_VERSION = 51, |
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43 NO_RELAX_ACCESS_CTRL_CHECK_VERSION = 52 |
1602 | 44 }; |
0 | 45 typedef enum { ThrowException, NoException } Mode; |
46 | |
47 /** | |
48 * Verify the bytecodes for a class. If 'throw_exception' is true | |
49 * then the appropriate VerifyError or ClassFormatError will be thrown. | |
50 * Otherwise, no exception is thrown and the return indicates the | |
51 * error. | |
52 */ | |
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53 static bool verify(instanceKlassHandle klass, Mode mode, bool should_verify_class, TRAPS); |
0 | 54 |
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55 // Return false if the class is loaded by the bootstrap loader, |
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56 // or if defineClass was called requesting skipping verification |
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57 // -Xverify:all/none override this value |
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58 static bool should_verify_for(oop class_loader, bool should_verify_class); |
0 | 59 |
60 // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. | |
61 static bool relax_verify_for(oop class_loader); | |
62 | |
63 private: | |
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64 static bool is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class); |
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65 static Symbol* inference_verify( |
0 | 66 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); |
67 }; | |
68 | |
69 class RawBytecodeStream; | |
70 class StackMapFrame; | |
71 class StackMapTable; | |
72 | |
73 // Summary of verifier's memory usage: | |
74 // StackMapTable is stack allocated. | |
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75 // StackMapFrame are resource allocated. There is only one ResourceMark |
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76 // for each class verification, which is created at the top level. |
0 | 77 // There is one mutable StackMapFrame (current_frame) which is updated |
78 // by abstract bytecode interpretation. frame_in_exception_handler() returns | |
79 // a frame that has a mutable one-item stack (ready for pushing the | |
80 // catch type exception object). All the other StackMapFrame's | |
81 // are immutable (including their locals and stack arrays) after | |
82 // their constructions. | |
83 // locals/stack arrays in StackMapFrame are resource allocated. | |
84 // locals/stack arrays can be shared between StackMapFrame's, except | |
85 // the mutable StackMapFrame (current_frame). | |
86 | |
87 // These macros are used similarly to CHECK macros but also check | |
88 // the status of the verifier and return if that has an error. | |
89 #define CHECK_VERIFY(verifier) \ | |
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90 CHECK); if ((verifier)->has_error()) return; ((void)0 |
0 | 91 #define CHECK_VERIFY_(verifier, result) \ |
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92 CHECK_(result)); if ((verifier)->has_error()) return (result); ((void)0 |
0 | 93 |
6605 | 94 class TypeOrigin VALUE_OBJ_CLASS_SPEC { |
95 private: | |
96 typedef enum { | |
97 CF_LOCALS, // Comes from the current frame locals | |
98 CF_STACK, // Comes from the current frame expression stack | |
99 SM_LOCALS, // Comes from stackmap locals | |
100 SM_STACK, // Comes from stackmap expression stack | |
101 CONST_POOL, // Comes from the constant pool | |
102 SIG, // Comes from method signature | |
103 IMPLICIT, // Comes implicitly from code or context | |
104 BAD_INDEX, // No type, but the index is bad | |
105 FRAME_ONLY, // No type, context just contains the frame | |
106 NONE | |
107 } Origin; | |
108 | |
109 Origin _origin; | |
110 u2 _index; // local, stack, or constant pool index | |
111 StackMapFrame* _frame; // source frame if CF or SM | |
112 VerificationType _type; // The actual type | |
113 | |
114 TypeOrigin( | |
115 Origin origin, u2 index, StackMapFrame* frame, VerificationType type) | |
116 : _origin(origin), _index(index), _frame(frame), _type(type) {} | |
117 | |
118 public: | |
119 TypeOrigin() : _origin(NONE), _index(0), _frame(NULL) {} | |
120 | |
121 static TypeOrigin null(); | |
122 static TypeOrigin local(u2 index, StackMapFrame* frame); | |
123 static TypeOrigin stack(u2 index, StackMapFrame* frame); | |
124 static TypeOrigin sm_local(u2 index, StackMapFrame* frame); | |
125 static TypeOrigin sm_stack(u2 index, StackMapFrame* frame); | |
126 static TypeOrigin cp(u2 index, VerificationType vt); | |
127 static TypeOrigin signature(VerificationType vt); | |
128 static TypeOrigin bad_index(u2 index); | |
129 static TypeOrigin implicit(VerificationType t); | |
130 static TypeOrigin frame(StackMapFrame* frame); | |
131 | |
132 void reset_frame(); | |
133 void details(outputStream* ss) const; | |
134 void print_frame(outputStream* ss) const; | |
135 const StackMapFrame* frame() const { return _frame; } | |
136 bool is_valid() const { return _origin != NONE; } | |
137 u2 index() const { return _index; } | |
138 | |
139 #ifdef ASSERT | |
140 void print_on(outputStream* str) const; | |
141 #endif | |
142 }; | |
143 | |
144 class ErrorContext VALUE_OBJ_CLASS_SPEC { | |
145 private: | |
146 typedef enum { | |
147 INVALID_BYTECODE, // There was a problem with the bytecode | |
148 WRONG_TYPE, // Type value was not as expected | |
149 FLAGS_MISMATCH, // Frame flags are not assignable | |
150 BAD_CP_INDEX, // Invalid constant pool index | |
151 BAD_LOCAL_INDEX, // Invalid local index | |
152 LOCALS_SIZE_MISMATCH, // Frames have differing local counts | |
153 STACK_SIZE_MISMATCH, // Frames have different stack sizes | |
154 STACK_OVERFLOW, // Attempt to push onto a full expression stack | |
155 STACK_UNDERFLOW, // Attempt to pop and empty expression stack | |
156 MISSING_STACKMAP, // No stackmap for this location and there should be | |
157 BAD_STACKMAP, // Format error in stackmap | |
158 NO_FAULT, // No error | |
159 UNKNOWN | |
160 } FaultType; | |
161 | |
162 int _bci; | |
163 FaultType _fault; | |
164 TypeOrigin _type; | |
165 TypeOrigin _expected; | |
166 | |
167 ErrorContext(int bci, FaultType fault) : | |
168 _bci(bci), _fault(fault) {} | |
169 ErrorContext(int bci, FaultType fault, TypeOrigin type) : | |
170 _bci(bci), _fault(fault), _type(type) {} | |
171 ErrorContext(int bci, FaultType fault, TypeOrigin type, TypeOrigin exp) : | |
172 _bci(bci), _fault(fault), _type(type), _expected(exp) {} | |
173 | |
174 public: | |
175 ErrorContext() : _bci(-1), _fault(NO_FAULT) {} | |
176 | |
177 static ErrorContext bad_code(u2 bci) { | |
178 return ErrorContext(bci, INVALID_BYTECODE); | |
179 } | |
180 static ErrorContext bad_type(u2 bci, TypeOrigin type) { | |
181 return ErrorContext(bci, WRONG_TYPE, type); | |
182 } | |
183 static ErrorContext bad_type(u2 bci, TypeOrigin type, TypeOrigin exp) { | |
184 return ErrorContext(bci, WRONG_TYPE, type, exp); | |
185 } | |
186 static ErrorContext bad_flags(u2 bci, StackMapFrame* frame) { | |
187 return ErrorContext(bci, FLAGS_MISMATCH, TypeOrigin::frame(frame)); | |
188 } | |
189 static ErrorContext bad_flags(u2 bci, StackMapFrame* cur, StackMapFrame* sm) { | |
190 return ErrorContext(bci, FLAGS_MISMATCH, | |
191 TypeOrigin::frame(cur), TypeOrigin::frame(sm)); | |
192 } | |
193 static ErrorContext bad_cp_index(u2 bci, u2 index) { | |
194 return ErrorContext(bci, BAD_CP_INDEX, TypeOrigin::bad_index(index)); | |
195 } | |
196 static ErrorContext bad_local_index(u2 bci, u2 index) { | |
197 return ErrorContext(bci, BAD_LOCAL_INDEX, TypeOrigin::bad_index(index)); | |
198 } | |
199 static ErrorContext locals_size_mismatch( | |
200 u2 bci, StackMapFrame* frame0, StackMapFrame* frame1) { | |
201 return ErrorContext(bci, LOCALS_SIZE_MISMATCH, | |
202 TypeOrigin::frame(frame0), TypeOrigin::frame(frame1)); | |
203 } | |
204 static ErrorContext stack_size_mismatch( | |
205 u2 bci, StackMapFrame* frame0, StackMapFrame* frame1) { | |
206 return ErrorContext(bci, STACK_SIZE_MISMATCH, | |
207 TypeOrigin::frame(frame0), TypeOrigin::frame(frame1)); | |
208 } | |
209 static ErrorContext stack_overflow(u2 bci, StackMapFrame* frame) { | |
210 return ErrorContext(bci, STACK_OVERFLOW, TypeOrigin::frame(frame)); | |
211 } | |
212 static ErrorContext stack_underflow(u2 bci, StackMapFrame* frame) { | |
213 return ErrorContext(bci, STACK_UNDERFLOW, TypeOrigin::frame(frame)); | |
214 } | |
215 static ErrorContext missing_stackmap(u2 bci) { | |
216 return ErrorContext(bci, MISSING_STACKMAP); | |
217 } | |
218 static ErrorContext bad_stackmap(int index, StackMapFrame* frame) { | |
219 return ErrorContext(0, BAD_STACKMAP, TypeOrigin::frame(frame)); | |
220 } | |
221 | |
222 bool is_valid() const { return _fault != NO_FAULT; } | |
223 int bci() const { return _bci; } | |
224 | |
225 void reset_frames() { | |
226 _type.reset_frame(); | |
227 _expected.reset_frame(); | |
228 } | |
229 | |
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230 void details(outputStream* ss, const Method* method) const; |
6605 | 231 |
232 #ifdef ASSERT | |
233 void print_on(outputStream* str) const { | |
234 str->print("error_context(%d, %d,", _bci, _fault); | |
235 _type.print_on(str); | |
236 str->print(","); | |
237 _expected.print_on(str); | |
238 str->print(")"); | |
239 } | |
240 #endif | |
241 | |
242 private: | |
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243 void location_details(outputStream* ss, const Method* method) const; |
6605 | 244 void reason_details(outputStream* ss) const; |
245 void frame_details(outputStream* ss) const; | |
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246 void bytecode_details(outputStream* ss, const Method* method) const; |
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247 void handler_details(outputStream* ss, const Method* method) const; |
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248 void stackmap_details(outputStream* ss, const Method* method) const; |
6605 | 249 }; |
250 | |
0 | 251 // A new instance of this class is created for each class being verified |
252 class ClassVerifier : public StackObj { | |
253 private: | |
254 Thread* _thread; | |
6605 | 255 GrowableArray<Symbol*>* _symbols; // keep a list of symbols created |
256 | |
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257 Symbol* _exception_type; |
0 | 258 char* _message; |
6605 | 259 |
260 ErrorContext _error_context; // contains information about an error | |
0 | 261 |
262 void verify_method(methodHandle method, TRAPS); | |
263 char* generate_code_data(methodHandle m, u4 code_length, TRAPS); | |
6605 | 264 void verify_exception_handler_table(u4 code_length, char* code_data, |
265 int& min, int& max, TRAPS); | |
0 | 266 void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); |
267 | |
268 VerificationType cp_ref_index_to_type( | |
269 int index, constantPoolHandle cp, TRAPS) { | |
270 return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); | |
271 } | |
272 | |
273 bool is_protected_access( | |
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274 instanceKlassHandle this_class, Klass* target_class, |
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275 Symbol* field_name, Symbol* field_sig, bool is_method); |
0 | 276 |
6605 | 277 void verify_cp_index(u2 bci, constantPoolHandle cp, int index, TRAPS); |
278 void verify_cp_type(u2 bci, int index, constantPoolHandle cp, | |
279 unsigned int types, TRAPS); | |
280 void verify_cp_class_type(u2 bci, int index, constantPoolHandle cp, TRAPS); | |
0 | 281 |
282 u2 verify_stackmap_table( | |
283 u2 stackmap_index, u2 bci, StackMapFrame* current_frame, | |
284 StackMapTable* stackmap_table, bool no_control_flow, TRAPS); | |
285 | |
286 void verify_exception_handler_targets( | |
287 u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
288 StackMapTable* stackmap_table, TRAPS); | |
289 | |
290 void verify_ldc( | |
291 int opcode, u2 index, StackMapFrame *current_frame, | |
292 constantPoolHandle cp, u2 bci, TRAPS); | |
293 | |
294 void verify_switch( | |
295 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
296 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); | |
297 | |
298 void verify_field_instructions( | |
299 RawBytecodeStream* bcs, StackMapFrame* current_frame, | |
300 constantPoolHandle cp, TRAPS); | |
301 | |
302 void verify_invoke_init( | |
6605 | 303 RawBytecodeStream* bcs, u2 ref_index, VerificationType ref_class_type, |
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304 StackMapFrame* current_frame, u4 code_length, bool in_try_block, |
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305 bool* this_uninit, constantPoolHandle cp, StackMapTable* stackmap_table, |
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306 TRAPS); |
0 | 307 |
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308 // Used by ends_in_athrow() to push all handlers that contain bci onto |
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309 // the handler_stack, if the handler is not already on the stack. |
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310 void push_handlers(ExceptionTable* exhandlers, |
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311 GrowableArray<u4>* handler_stack, |
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312 u4 bci); |
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313 |
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314 // Returns true if all paths starting with start_bc_offset end in athrow |
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315 // bytecode or loop. |
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316 bool ends_in_athrow(u4 start_bc_offset); |
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317 |
0 | 318 void verify_invoke_instructions( |
319 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
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320 bool in_try_block, bool* this_uninit, VerificationType return_type, |
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321 constantPoolHandle cp, StackMapTable* stackmap_table, TRAPS); |
0 | 322 |
323 VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); | |
6605 | 324 void verify_anewarray(u2 bci, u2 index, constantPoolHandle cp, |
325 StackMapFrame* current_frame, TRAPS); | |
0 | 326 void verify_return_value( |
6605 | 327 VerificationType return_type, VerificationType type, u2 offset, |
328 StackMapFrame* current_frame, TRAPS); | |
0 | 329 |
330 void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); | |
331 void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); | |
332 void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); | |
333 void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); | |
334 void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); | |
335 void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); | |
336 void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
337 void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
338 void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
339 void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); | |
340 void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); | |
341 | |
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342 bool name_in_supers(Symbol* ref_name, instanceKlassHandle current); |
0 | 343 |
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344 VerificationType object_type() const; |
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345 |
0 | 346 instanceKlassHandle _klass; // the class being verified |
347 methodHandle _method; // current method being verified | |
348 VerificationType _this_type; // the verification type of the current class | |
349 | |
1570 | 350 // Some recursive calls from the verifier to the name resolver |
351 // can cause the current class to be re-verified and rewritten. | |
352 // If this happens, the original verification should not continue, | |
353 // because constant pool indexes will have changed. | |
354 // The rewriter is preceded by the verifier. If the verifier throws | |
355 // an error, rewriting is prevented. Also, rewriting always precedes | |
356 // bytecode execution or compilation. Thus, is_rewritten implies | |
357 // that a class has been verified and prepared for execution. | |
358 bool was_recursively_verified() { return _klass->is_rewritten(); } | |
359 | |
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360 bool is_same_or_direct_interface(instanceKlassHandle klass, |
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361 VerificationType klass_type, VerificationType ref_class_type); |
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362 |
0 | 363 public: |
364 enum { | |
365 BYTECODE_OFFSET = 1, | |
366 NEW_OFFSET = 2 | |
367 }; | |
368 | |
369 // constructor | |
6605 | 370 ClassVerifier(instanceKlassHandle klass, TRAPS); |
0 | 371 |
372 // destructor | |
373 ~ClassVerifier(); | |
374 | |
375 Thread* thread() { return _thread; } | |
376 methodHandle method() { return _method; } | |
377 instanceKlassHandle current_class() const { return _klass; } | |
378 VerificationType current_type() const { return _this_type; } | |
379 | |
380 // Verifies the class. If a verify or class file format error occurs, | |
381 // the '_exception_name' symbols will set to the exception name and | |
382 // the message_buffer will be filled in with the exception message. | |
383 void verify_class(TRAPS); | |
384 | |
385 // Return status modes | |
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386 Symbol* result() const { return _exception_type; } |
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387 bool has_error() const { return result() != NULL; } |
6605 | 388 char* exception_message() { |
389 stringStream ss; | |
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390 ss.print("%s", _message); |
6605 | 391 _error_context.details(&ss, _method()); |
392 return ss.as_string(); | |
393 } | |
0 | 394 |
395 // Called when verify or class format errors are encountered. | |
396 // May throw an exception based upon the mode. | |
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397 void verify_error(ErrorContext ctx, const char* fmt, ...) ATTRIBUTE_PRINTF(3, 4); |
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398 void class_format_error(const char* fmt, ...) ATTRIBUTE_PRINTF(2, 3); |
0 | 399 |
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400 Klass* load_class(Symbol* name, TRAPS); |
0 | 401 |
402 int change_sig_to_verificationType( | |
403 SignatureStream* sig_type, VerificationType* inference_type, TRAPS); | |
404 | |
405 VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { | |
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406 return VerificationType::reference_type(cp->klass_name_at(index)); |
0 | 407 } |
408 | |
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409 // Keep a list of temporary symbols created during verification because |
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410 // their reference counts need to be decrememented when the verifier object |
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411 // goes out of scope. Since these symbols escape the scope in which they're |
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412 // created, we can't use a TempNewSymbol. |
6605 | 413 Symbol* create_temporary_symbol( |
414 const Symbol* s, int begin, int end, TRAPS); | |
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415 Symbol* create_temporary_symbol(const char *s, int length, TRAPS); |
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416 |
6605 | 417 TypeOrigin ref_ctx(const char* str, TRAPS); |
17573 | 418 |
0 | 419 }; |
420 | |
421 inline int ClassVerifier::change_sig_to_verificationType( | |
422 SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { | |
423 BasicType bt = sig_type->type(); | |
424 switch (bt) { | |
425 case T_OBJECT: | |
426 case T_ARRAY: | |
427 { | |
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428 Symbol* name = sig_type->as_symbol(CHECK_0); |
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429 // Create another symbol to save as signature stream unreferences |
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430 // this symbol. |
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431 Symbol* name_copy = |
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432 create_temporary_symbol(name, 0, name->utf8_length(), CHECK_0); |
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433 assert(name_copy == name, "symbols don't match"); |
0 | 434 *inference_type = |
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435 VerificationType::reference_type(name_copy); |
0 | 436 return 1; |
437 } | |
438 case T_LONG: | |
439 *inference_type = VerificationType::long_type(); | |
440 *++inference_type = VerificationType::long2_type(); | |
441 return 2; | |
442 case T_DOUBLE: | |
443 *inference_type = VerificationType::double_type(); | |
444 *++inference_type = VerificationType::double2_type(); | |
445 return 2; | |
446 case T_INT: | |
447 case T_BOOLEAN: | |
448 case T_BYTE: | |
449 case T_CHAR: | |
450 case T_SHORT: | |
451 *inference_type = VerificationType::integer_type(); | |
452 return 1; | |
453 case T_FLOAT: | |
454 *inference_type = VerificationType::float_type(); | |
455 return 1; | |
456 default: | |
457 ShouldNotReachHere(); | |
458 return 1; | |
459 } | |
460 } | |
1972 | 461 |
462 #endif // SHARE_VM_CLASSFILE_VERIFIER_HPP |