Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.hpp @ 20242:d14a18794c90
8051012: Regression in verifier for <init> method call from inside of a branch
Summary: Fix stackmap matching for branches.
Reviewed-by: coleenp, lfoltan, acorn
| author | hseigel |
|---|---|
| date | Sat, 02 Aug 2014 16:28:59 -0400 |
| parents | f73af4455d7d |
| children | 077483254bf6 |
| rev | line source |
|---|---|
| 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" |
| 33 #include "utilities/exceptions.hpp" | |
| 34 | |
| 0 | 35 // The verifier class |
| 36 class Verifier : AllStatic { | |
| 37 public: | |
| 1602 | 38 enum { |
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39 STRICTER_ACCESS_CTRL_CHECK_VERSION = 49, |
| 1602 | 40 STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50, |
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41 INVOKEDYNAMIC_MAJOR_VERSION = 51, |
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42 NO_RELAX_ACCESS_CTRL_CHECK_VERSION = 52 |
| 1602 | 43 }; |
| 0 | 44 typedef enum { ThrowException, NoException } Mode; |
| 45 | |
| 46 /** | |
| 47 * Verify the bytecodes for a class. If 'throw_exception' is true | |
| 48 * then the appropriate VerifyError or ClassFormatError will be thrown. | |
| 49 * Otherwise, no exception is thrown and the return indicates the | |
| 50 * error. | |
| 51 */ | |
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52 static bool verify(instanceKlassHandle klass, Mode mode, bool should_verify_class, TRAPS); |
| 0 | 53 |
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54 // Return false if the class is loaded by the bootstrap loader, |
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55 // or if defineClass was called requesting skipping verification |
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56 // -Xverify:all/none override this value |
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57 static bool should_verify_for(oop class_loader, bool should_verify_class); |
| 0 | 58 |
| 59 // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. | |
| 60 static bool relax_verify_for(oop class_loader); | |
| 61 | |
| 62 private: | |
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63 static bool is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class); |
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64 static Symbol* inference_verify( |
| 0 | 65 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); |
| 66 }; | |
| 67 | |
| 68 class RawBytecodeStream; | |
| 69 class StackMapFrame; | |
| 70 class StackMapTable; | |
| 71 | |
| 72 // Summary of verifier's memory usage: | |
| 73 // StackMapTable is stack allocated. | |
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74 // StackMapFrame are resource allocated. There is only one ResourceMark |
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75 // for each class verification, which is created at the top level. |
| 0 | 76 // There is one mutable StackMapFrame (current_frame) which is updated |
| 77 // by abstract bytecode interpretation. frame_in_exception_handler() returns | |
| 78 // a frame that has a mutable one-item stack (ready for pushing the | |
| 79 // catch type exception object). All the other StackMapFrame's | |
| 80 // are immutable (including their locals and stack arrays) after | |
| 81 // their constructions. | |
| 82 // locals/stack arrays in StackMapFrame are resource allocated. | |
| 83 // locals/stack arrays can be shared between StackMapFrame's, except | |
| 84 // the mutable StackMapFrame (current_frame). | |
| 85 | |
| 86 // These macros are used similarly to CHECK macros but also check | |
| 87 // the status of the verifier and return if that has an error. | |
| 88 #define CHECK_VERIFY(verifier) \ | |
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89 CHECK); if ((verifier)->has_error()) return; ((void)0 |
| 0 | 90 #define CHECK_VERIFY_(verifier, result) \ |
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91 CHECK_(result)); if ((verifier)->has_error()) return (result); ((void)0 |
| 0 | 92 |
| 6605 | 93 class TypeOrigin VALUE_OBJ_CLASS_SPEC { |
| 94 private: | |
| 95 typedef enum { | |
| 96 CF_LOCALS, // Comes from the current frame locals | |
| 97 CF_STACK, // Comes from the current frame expression stack | |
| 98 SM_LOCALS, // Comes from stackmap locals | |
| 99 SM_STACK, // Comes from stackmap expression stack | |
| 100 CONST_POOL, // Comes from the constant pool | |
| 101 SIG, // Comes from method signature | |
| 102 IMPLICIT, // Comes implicitly from code or context | |
| 103 BAD_INDEX, // No type, but the index is bad | |
| 104 FRAME_ONLY, // No type, context just contains the frame | |
| 105 NONE | |
| 106 } Origin; | |
| 107 | |
| 108 Origin _origin; | |
| 109 u2 _index; // local, stack, or constant pool index | |
| 110 StackMapFrame* _frame; // source frame if CF or SM | |
| 111 VerificationType _type; // The actual type | |
| 112 | |
| 113 TypeOrigin( | |
| 114 Origin origin, u2 index, StackMapFrame* frame, VerificationType type) | |
| 115 : _origin(origin), _index(index), _frame(frame), _type(type) {} | |
| 116 | |
| 117 public: | |
| 118 TypeOrigin() : _origin(NONE), _index(0), _frame(NULL) {} | |
| 119 | |
| 120 static TypeOrigin null(); | |
| 121 static TypeOrigin local(u2 index, StackMapFrame* frame); | |
| 122 static TypeOrigin stack(u2 index, StackMapFrame* frame); | |
| 123 static TypeOrigin sm_local(u2 index, StackMapFrame* frame); | |
| 124 static TypeOrigin sm_stack(u2 index, StackMapFrame* frame); | |
| 125 static TypeOrigin cp(u2 index, VerificationType vt); | |
| 126 static TypeOrigin signature(VerificationType vt); | |
| 127 static TypeOrigin bad_index(u2 index); | |
| 128 static TypeOrigin implicit(VerificationType t); | |
| 129 static TypeOrigin frame(StackMapFrame* frame); | |
| 130 | |
| 131 void reset_frame(); | |
| 132 void details(outputStream* ss) const; | |
| 133 void print_frame(outputStream* ss) const; | |
| 134 const StackMapFrame* frame() const { return _frame; } | |
| 135 bool is_valid() const { return _origin != NONE; } | |
| 136 u2 index() const { return _index; } | |
| 137 | |
| 138 #ifdef ASSERT | |
| 139 void print_on(outputStream* str) const; | |
| 140 #endif | |
| 141 }; | |
| 142 | |
| 143 class ErrorContext VALUE_OBJ_CLASS_SPEC { | |
| 144 private: | |
| 145 typedef enum { | |
| 146 INVALID_BYTECODE, // There was a problem with the bytecode | |
| 147 WRONG_TYPE, // Type value was not as expected | |
| 148 FLAGS_MISMATCH, // Frame flags are not assignable | |
| 149 BAD_CP_INDEX, // Invalid constant pool index | |
| 150 BAD_LOCAL_INDEX, // Invalid local index | |
| 151 LOCALS_SIZE_MISMATCH, // Frames have differing local counts | |
| 152 STACK_SIZE_MISMATCH, // Frames have different stack sizes | |
| 153 STACK_OVERFLOW, // Attempt to push onto a full expression stack | |
| 154 STACK_UNDERFLOW, // Attempt to pop and empty expression stack | |
| 155 MISSING_STACKMAP, // No stackmap for this location and there should be | |
| 156 BAD_STACKMAP, // Format error in stackmap | |
| 157 NO_FAULT, // No error | |
| 158 UNKNOWN | |
| 159 } FaultType; | |
| 160 | |
| 161 int _bci; | |
| 162 FaultType _fault; | |
| 163 TypeOrigin _type; | |
| 164 TypeOrigin _expected; | |
| 165 | |
| 166 ErrorContext(int bci, FaultType fault) : | |
| 167 _bci(bci), _fault(fault) {} | |
| 168 ErrorContext(int bci, FaultType fault, TypeOrigin type) : | |
| 169 _bci(bci), _fault(fault), _type(type) {} | |
| 170 ErrorContext(int bci, FaultType fault, TypeOrigin type, TypeOrigin exp) : | |
| 171 _bci(bci), _fault(fault), _type(type), _expected(exp) {} | |
| 172 | |
| 173 public: | |
| 174 ErrorContext() : _bci(-1), _fault(NO_FAULT) {} | |
| 175 | |
| 176 static ErrorContext bad_code(u2 bci) { | |
| 177 return ErrorContext(bci, INVALID_BYTECODE); | |
| 178 } | |
| 179 static ErrorContext bad_type(u2 bci, TypeOrigin type) { | |
| 180 return ErrorContext(bci, WRONG_TYPE, type); | |
| 181 } | |
| 182 static ErrorContext bad_type(u2 bci, TypeOrigin type, TypeOrigin exp) { | |
| 183 return ErrorContext(bci, WRONG_TYPE, type, exp); | |
| 184 } | |
| 185 static ErrorContext bad_flags(u2 bci, StackMapFrame* frame) { | |
| 186 return ErrorContext(bci, FLAGS_MISMATCH, TypeOrigin::frame(frame)); | |
| 187 } | |
| 188 static ErrorContext bad_flags(u2 bci, StackMapFrame* cur, StackMapFrame* sm) { | |
| 189 return ErrorContext(bci, FLAGS_MISMATCH, | |
| 190 TypeOrigin::frame(cur), TypeOrigin::frame(sm)); | |
| 191 } | |
| 192 static ErrorContext bad_cp_index(u2 bci, u2 index) { | |
| 193 return ErrorContext(bci, BAD_CP_INDEX, TypeOrigin::bad_index(index)); | |
| 194 } | |
| 195 static ErrorContext bad_local_index(u2 bci, u2 index) { | |
| 196 return ErrorContext(bci, BAD_LOCAL_INDEX, TypeOrigin::bad_index(index)); | |
| 197 } | |
| 198 static ErrorContext locals_size_mismatch( | |
| 199 u2 bci, StackMapFrame* frame0, StackMapFrame* frame1) { | |
| 200 return ErrorContext(bci, LOCALS_SIZE_MISMATCH, | |
| 201 TypeOrigin::frame(frame0), TypeOrigin::frame(frame1)); | |
| 202 } | |
| 203 static ErrorContext stack_size_mismatch( | |
| 204 u2 bci, StackMapFrame* frame0, StackMapFrame* frame1) { | |
| 205 return ErrorContext(bci, STACK_SIZE_MISMATCH, | |
| 206 TypeOrigin::frame(frame0), TypeOrigin::frame(frame1)); | |
| 207 } | |
| 208 static ErrorContext stack_overflow(u2 bci, StackMapFrame* frame) { | |
| 209 return ErrorContext(bci, STACK_OVERFLOW, TypeOrigin::frame(frame)); | |
| 210 } | |
| 211 static ErrorContext stack_underflow(u2 bci, StackMapFrame* frame) { | |
| 212 return ErrorContext(bci, STACK_UNDERFLOW, TypeOrigin::frame(frame)); | |
| 213 } | |
| 214 static ErrorContext missing_stackmap(u2 bci) { | |
| 215 return ErrorContext(bci, MISSING_STACKMAP); | |
| 216 } | |
| 217 static ErrorContext bad_stackmap(int index, StackMapFrame* frame) { | |
| 218 return ErrorContext(0, BAD_STACKMAP, TypeOrigin::frame(frame)); | |
| 219 } | |
| 220 | |
| 221 bool is_valid() const { return _fault != NO_FAULT; } | |
| 222 int bci() const { return _bci; } | |
| 223 | |
| 224 void reset_frames() { | |
| 225 _type.reset_frame(); | |
| 226 _expected.reset_frame(); | |
| 227 } | |
| 228 | |
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229 void details(outputStream* ss, const Method* method) const; |
| 6605 | 230 |
| 231 #ifdef ASSERT | |
| 232 void print_on(outputStream* str) const { | |
| 233 str->print("error_context(%d, %d,", _bci, _fault); | |
| 234 _type.print_on(str); | |
| 235 str->print(","); | |
| 236 _expected.print_on(str); | |
| 237 str->print(")"); | |
| 238 } | |
| 239 #endif | |
| 240 | |
| 241 private: | |
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242 void location_details(outputStream* ss, const Method* method) const; |
| 6605 | 243 void reason_details(outputStream* ss) const; |
| 244 void frame_details(outputStream* ss) const; | |
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245 void bytecode_details(outputStream* ss, const Method* method) const; |
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246 void handler_details(outputStream* ss, const Method* method) const; |
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247 void stackmap_details(outputStream* ss, const Method* method) const; |
| 6605 | 248 }; |
| 249 | |
| 0 | 250 // A new instance of this class is created for each class being verified |
| 251 class ClassVerifier : public StackObj { | |
| 252 private: | |
| 253 Thread* _thread; | |
| 6605 | 254 GrowableArray<Symbol*>* _symbols; // keep a list of symbols created |
| 255 | |
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256 Symbol* _exception_type; |
| 0 | 257 char* _message; |
| 6605 | 258 |
| 259 ErrorContext _error_context; // contains information about an error | |
| 0 | 260 |
| 261 void verify_method(methodHandle method, TRAPS); | |
| 262 char* generate_code_data(methodHandle m, u4 code_length, TRAPS); | |
| 6605 | 263 void verify_exception_handler_table(u4 code_length, char* code_data, |
| 264 int& min, int& max, TRAPS); | |
| 0 | 265 void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); |
| 266 | |
| 267 VerificationType cp_ref_index_to_type( | |
| 268 int index, constantPoolHandle cp, TRAPS) { | |
| 269 return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); | |
| 270 } | |
| 271 | |
| 272 bool is_protected_access( | |
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273 instanceKlassHandle this_class, Klass* target_class, |
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274 Symbol* field_name, Symbol* field_sig, bool is_method); |
| 0 | 275 |
| 6605 | 276 void verify_cp_index(u2 bci, constantPoolHandle cp, int index, TRAPS); |
| 277 void verify_cp_type(u2 bci, int index, constantPoolHandle cp, | |
| 278 unsigned int types, TRAPS); | |
| 279 void verify_cp_class_type(u2 bci, int index, constantPoolHandle cp, TRAPS); | |
| 0 | 280 |
| 281 u2 verify_stackmap_table( | |
| 282 u2 stackmap_index, u2 bci, StackMapFrame* current_frame, | |
| 283 StackMapTable* stackmap_table, bool no_control_flow, TRAPS); | |
| 284 | |
| 285 void verify_exception_handler_targets( | |
| 286 u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
| 287 StackMapTable* stackmap_table, TRAPS); | |
| 288 | |
| 289 void verify_ldc( | |
| 290 int opcode, u2 index, StackMapFrame *current_frame, | |
| 291 constantPoolHandle cp, u2 bci, TRAPS); | |
| 292 | |
| 293 void verify_switch( | |
| 294 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
| 295 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); | |
| 296 | |
| 297 void verify_field_instructions( | |
| 298 RawBytecodeStream* bcs, StackMapFrame* current_frame, | |
| 299 constantPoolHandle cp, TRAPS); | |
| 300 | |
| 301 void verify_invoke_init( | |
| 6605 | 302 RawBytecodeStream* bcs, u2 ref_index, VerificationType ref_class_type, |
| 0 | 303 StackMapFrame* current_frame, u4 code_length, bool* this_uninit, |
| 304 constantPoolHandle cp, TRAPS); | |
| 305 | |
| 306 void verify_invoke_instructions( | |
| 307 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
| 308 bool* this_uninit, VerificationType return_type, | |
| 309 constantPoolHandle cp, TRAPS); | |
| 310 | |
| 311 VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); | |
| 6605 | 312 void verify_anewarray(u2 bci, u2 index, constantPoolHandle cp, |
| 313 StackMapFrame* current_frame, TRAPS); | |
| 0 | 314 void verify_return_value( |
| 6605 | 315 VerificationType return_type, VerificationType type, u2 offset, |
| 316 StackMapFrame* current_frame, TRAPS); | |
| 0 | 317 |
| 318 void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 319 void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 320 void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 321 void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 322 void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 323 void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 324 void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 325 void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 326 void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 327 void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); | |
| 328 void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); | |
| 329 | |
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330 bool name_in_supers(Symbol* ref_name, instanceKlassHandle current); |
| 0 | 331 |
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332 VerificationType object_type() const; |
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333 |
| 0 | 334 instanceKlassHandle _klass; // the class being verified |
| 335 methodHandle _method; // current method being verified | |
| 336 VerificationType _this_type; // the verification type of the current class | |
| 337 | |
| 1570 | 338 // Some recursive calls from the verifier to the name resolver |
| 339 // can cause the current class to be re-verified and rewritten. | |
| 340 // If this happens, the original verification should not continue, | |
| 341 // because constant pool indexes will have changed. | |
| 342 // The rewriter is preceded by the verifier. If the verifier throws | |
| 343 // an error, rewriting is prevented. Also, rewriting always precedes | |
| 344 // bytecode execution or compilation. Thus, is_rewritten implies | |
| 345 // that a class has been verified and prepared for execution. | |
| 346 bool was_recursively_verified() { return _klass->is_rewritten(); } | |
| 347 | |
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348 bool is_same_or_direct_interface(instanceKlassHandle klass, |
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349 VerificationType klass_type, VerificationType ref_class_type); |
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350 |
| 0 | 351 public: |
| 352 enum { | |
| 353 BYTECODE_OFFSET = 1, | |
| 354 NEW_OFFSET = 2 | |
| 355 }; | |
| 356 | |
| 357 // constructor | |
| 6605 | 358 ClassVerifier(instanceKlassHandle klass, TRAPS); |
| 0 | 359 |
| 360 // destructor | |
| 361 ~ClassVerifier(); | |
| 362 | |
| 363 Thread* thread() { return _thread; } | |
| 364 methodHandle method() { return _method; } | |
| 365 instanceKlassHandle current_class() const { return _klass; } | |
| 366 VerificationType current_type() const { return _this_type; } | |
| 367 | |
| 368 // Verifies the class. If a verify or class file format error occurs, | |
| 369 // the '_exception_name' symbols will set to the exception name and | |
| 370 // the message_buffer will be filled in with the exception message. | |
| 371 void verify_class(TRAPS); | |
| 372 | |
| 373 // Return status modes | |
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374 Symbol* result() const { return _exception_type; } |
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375 bool has_error() const { return result() != NULL; } |
| 6605 | 376 char* exception_message() { |
| 377 stringStream ss; | |
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378 ss.print("%s", _message); |
| 6605 | 379 _error_context.details(&ss, _method()); |
| 380 return ss.as_string(); | |
| 381 } | |
| 0 | 382 |
| 383 // Called when verify or class format errors are encountered. | |
| 384 // May throw an exception based upon the mode. | |
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385 void verify_error(ErrorContext ctx, const char* fmt, ...) ATTRIBUTE_PRINTF(3, 4); |
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386 void class_format_error(const char* fmt, ...) ATTRIBUTE_PRINTF(2, 3); |
| 0 | 387 |
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388 Klass* load_class(Symbol* name, TRAPS); |
| 0 | 389 |
| 390 int change_sig_to_verificationType( | |
| 391 SignatureStream* sig_type, VerificationType* inference_type, TRAPS); | |
| 392 | |
| 393 VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { | |
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394 return VerificationType::reference_type(cp->klass_name_at(index)); |
| 0 | 395 } |
| 396 | |
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397 // Keep a list of temporary symbols created during verification because |
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398 // their reference counts need to be decrememented when the verifier object |
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399 // goes out of scope. Since these symbols escape the scope in which they're |
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400 // created, we can't use a TempNewSymbol. |
| 6605 | 401 Symbol* create_temporary_symbol( |
| 402 const Symbol* s, int begin, int end, TRAPS); | |
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403 Symbol* create_temporary_symbol(const char *s, int length, TRAPS); |
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404 |
| 6605 | 405 TypeOrigin ref_ctx(const char* str, TRAPS); |
| 17573 | 406 |
| 0 | 407 }; |
| 408 | |
| 409 inline int ClassVerifier::change_sig_to_verificationType( | |
| 410 SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { | |
| 411 BasicType bt = sig_type->type(); | |
| 412 switch (bt) { | |
| 413 case T_OBJECT: | |
| 414 case T_ARRAY: | |
| 415 { | |
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416 Symbol* name = sig_type->as_symbol(CHECK_0); |
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417 // Create another symbol to save as signature stream unreferences |
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418 // this symbol. |
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419 Symbol* name_copy = |
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420 create_temporary_symbol(name, 0, name->utf8_length(), CHECK_0); |
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421 assert(name_copy == name, "symbols don't match"); |
| 0 | 422 *inference_type = |
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423 VerificationType::reference_type(name_copy); |
| 0 | 424 return 1; |
| 425 } | |
| 426 case T_LONG: | |
| 427 *inference_type = VerificationType::long_type(); | |
| 428 *++inference_type = VerificationType::long2_type(); | |
| 429 return 2; | |
| 430 case T_DOUBLE: | |
| 431 *inference_type = VerificationType::double_type(); | |
| 432 *++inference_type = VerificationType::double2_type(); | |
| 433 return 2; | |
| 434 case T_INT: | |
| 435 case T_BOOLEAN: | |
| 436 case T_BYTE: | |
| 437 case T_CHAR: | |
| 438 case T_SHORT: | |
| 439 *inference_type = VerificationType::integer_type(); | |
| 440 return 1; | |
| 441 case T_FLOAT: | |
| 442 *inference_type = VerificationType::float_type(); | |
| 443 return 1; | |
| 444 default: | |
| 445 ShouldNotReachHere(); | |
| 446 return 1; | |
| 447 } | |
| 448 } | |
| 1972 | 449 |
| 450 #endif // SHARE_VM_CLASSFILE_VERIFIER_HPP |