Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 973:ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
Reviewed-by: kamg, phh
| author | acorn |
|---|---|
| date | Fri, 04 Sep 2009 12:53:02 -0400 |
| parents | bd02caa94611 |
| children | 389049f3f393 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 844 | 2 * Copyright 1998-2009 Sun Microsystems, Inc. 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 * | |
| 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 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_verifier.cpp.incl" | |
| 27 | |
| 28 // Access to external entry for VerifyClassCodes - old byte code verifier | |
| 29 | |
| 30 extern "C" { | |
| 31 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
| 32 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
| 33 } | |
| 34 | |
| 35 static void* volatile _verify_byte_codes_fn = NULL; | |
| 36 | |
| 37 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
| 38 | |
| 39 static void* verify_byte_codes_fn() { | |
| 40 if (_verify_byte_codes_fn == NULL) { | |
| 41 void *lib_handle = os::native_java_library(); | |
| 42 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); | |
| 43 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
| 44 if (func == NULL) { | |
| 45 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
| 46 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); | |
| 47 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
| 48 } | |
| 49 } | |
| 50 return (void*)_verify_byte_codes_fn; | |
| 51 } | |
| 52 | |
| 53 | |
| 54 // Methods in Verifier | |
| 55 | |
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56 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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57 return (class_loader == NULL || !should_verify_class) ? |
| 0 | 58 BytecodeVerificationLocal : BytecodeVerificationRemote; |
| 59 } | |
| 60 | |
| 61 bool Verifier::relax_verify_for(oop loader) { | |
| 62 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
| 63 bool need_verify = | |
| 64 // verifyAll | |
| 65 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
| 66 // verifyRemote | |
| 67 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
| 68 return !need_verify; | |
| 69 } | |
| 70 | |
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71 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
| 0 | 72 ResourceMark rm(THREAD); |
| 73 HandleMark hm; | |
| 74 | |
| 75 symbolHandle exception_name; | |
| 76 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; | |
| 77 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
| 78 | |
| 79 const char* klassName = klass->external_name(); | |
| 80 | |
| 81 // If the class should be verified, first see if we can use the split | |
| 82 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
| 83 // is set, then call the inference verifier. | |
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84 if (is_eligible_for_verification(klass, should_verify_class)) { |
| 0 | 85 if (TraceClassInitialization) { |
| 86 tty->print_cr("Start class verification for: %s", klassName); | |
| 87 } | |
| 88 if (UseSplitVerifier && | |
| 89 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
| 90 ClassVerifier split_verifier( | |
| 91 klass, message_buffer, message_buffer_len, THREAD); | |
| 92 split_verifier.verify_class(THREAD); | |
| 93 exception_name = split_verifier.result(); | |
| 94 if (FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && | |
| 95 (exception_name == vmSymbols::java_lang_VerifyError() || | |
| 96 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
| 97 if (TraceClassInitialization) { | |
| 98 tty->print_cr( | |
| 99 "Fail over class verification to old verifier for: %s", klassName); | |
| 100 } | |
| 101 exception_name = inference_verify( | |
| 102 klass, message_buffer, message_buffer_len, THREAD); | |
| 103 } | |
| 104 } else { | |
| 105 exception_name = inference_verify( | |
| 106 klass, message_buffer, message_buffer_len, THREAD); | |
| 107 } | |
| 108 | |
| 109 if (TraceClassInitialization) { | |
| 110 if (HAS_PENDING_EXCEPTION) { | |
| 111 tty->print("Verification for %s has", klassName); | |
| 112 tty->print_cr(" exception pending %s ", | |
| 113 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
| 114 } else if (!exception_name.is_null()) { | |
| 115 tty->print_cr("Verification for %s failed", klassName); | |
| 116 } | |
| 117 tty->print_cr("End class verification for: %s", klassName); | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 if (HAS_PENDING_EXCEPTION) { | |
| 122 return false; // use the existing exception | |
| 123 } else if (exception_name.is_null()) { | |
| 124 return true; // verifcation succeeded | |
| 125 } else { // VerifyError or ClassFormatError to be created and thrown | |
| 126 ResourceMark rm(THREAD); | |
| 127 instanceKlassHandle kls = | |
| 128 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
| 129 while (!kls.is_null()) { | |
| 130 if (kls == klass) { | |
| 131 // If the class being verified is the exception we're creating | |
| 132 // or one of it's superclasses, we're in trouble and are going | |
| 133 // to infinitely recurse when we try to initialize the exception. | |
| 134 // So bail out here by throwing the preallocated VM error. | |
| 135 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
| 136 } | |
| 137 kls = kls->super(); | |
| 138 } | |
| 139 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
| 140 THROW_MSG_(exception_name, message_buffer, false); | |
| 141 } | |
| 142 } | |
| 143 | |
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144 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
| 0 | 145 symbolOop name = klass->name(); |
| 146 klassOop refl_magic_klass = SystemDictionary::reflect_magic_klass(); | |
| 147 | |
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148 return (should_verify_for(klass->class_loader(), should_verify_class) && |
| 0 | 149 // return if the class is a bootstrapping class |
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150 // or defineClass specified not to verify by default (flags override passed arg) |
| 0 | 151 // We need to skip the following four for bootstraping |
| 152 name != vmSymbols::java_lang_Object() && | |
| 153 name != vmSymbols::java_lang_Class() && | |
| 154 name != vmSymbols::java_lang_String() && | |
| 155 name != vmSymbols::java_lang_Throwable() && | |
| 156 | |
| 157 // Can not verify the bytecodes for shared classes because they have | |
| 158 // already been rewritten to contain constant pool cache indices, | |
| 159 // which the verifier can't understand. | |
| 160 // Shared classes shouldn't have stackmaps either. | |
| 161 !klass()->is_shared() && | |
| 162 | |
| 163 // As of the fix for 4486457 we disable verification for all of the | |
| 164 // dynamically-generated bytecodes associated with the 1.4 | |
| 165 // reflection implementation, not just those associated with | |
| 166 // sun/reflect/SerializationConstructorAccessor. | |
| 167 // NOTE: this is called too early in the bootstrapping process to be | |
| 168 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
| 169 (refl_magic_klass == NULL || | |
| 170 !klass->is_subtype_of(refl_magic_klass) || | |
| 171 VerifyReflectionBytecodes) | |
| 172 ); | |
| 173 } | |
| 174 | |
| 175 symbolHandle Verifier::inference_verify( | |
| 176 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
| 177 JavaThread* thread = (JavaThread*)THREAD; | |
| 178 JNIEnv *env = thread->jni_environment(); | |
| 179 | |
| 180 void* verify_func = verify_byte_codes_fn(); | |
| 181 | |
| 182 if (verify_func == NULL) { | |
| 183 jio_snprintf(message, message_len, "Could not link verifier"); | |
| 184 return vmSymbols::java_lang_VerifyError(); | |
| 185 } | |
| 186 | |
| 187 ResourceMark rm(THREAD); | |
| 188 if (ClassVerifier::_verify_verbose) { | |
| 189 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
| 190 } | |
| 191 | |
| 192 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
| 193 jint result; | |
| 194 | |
| 195 { | |
| 196 HandleMark hm(thread); | |
| 197 ThreadToNativeFromVM ttn(thread); | |
| 198 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
| 199 // code knows that we have left the VM | |
| 200 | |
| 201 if (_is_new_verify_byte_codes_fn) { | |
| 202 verify_byte_codes_fn_new_t func = | |
| 203 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
| 204 result = (*func)(env, cls, message, (int)message_len, | |
| 205 klass->major_version()); | |
| 206 } else { | |
| 207 verify_byte_codes_fn_t func = | |
| 208 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
| 209 result = (*func)(env, cls, message, (int)message_len); | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 JNIHandles::destroy_local(cls); | |
| 214 | |
| 215 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
| 216 // to be changed (still return jboolean (unsigned char)), and result is | |
| 217 // 1 when verification is passed. | |
| 218 symbolHandle nh(NULL); | |
| 219 if (result == 0) { | |
| 220 return vmSymbols::java_lang_VerifyError(); | |
| 221 } else if (result == 1) { | |
| 222 return nh; // verified. | |
| 223 } else if (result == 2) { | |
| 224 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
| 225 } else if (result == 3) { | |
| 226 return vmSymbols::java_lang_ClassFormatError(); | |
| 227 } else { | |
| 228 ShouldNotReachHere(); | |
| 229 return nh; | |
| 230 } | |
| 231 } | |
| 232 | |
| 233 // Methods in ClassVerifier | |
| 234 | |
| 235 bool ClassVerifier::_verify_verbose = false; | |
| 236 | |
| 237 ClassVerifier::ClassVerifier( | |
| 238 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
| 239 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
| 240 _message_buffer_len(msg_len), _klass(klass) { | |
| 241 _this_type = VerificationType::reference_type(klass->name()); | |
| 242 } | |
| 243 | |
| 244 ClassVerifier::~ClassVerifier() { | |
| 245 } | |
| 246 | |
| 247 void ClassVerifier::verify_class(TRAPS) { | |
| 248 if (_verify_verbose) { | |
| 249 tty->print_cr("Verifying class %s with new format", | |
| 250 _klass->external_name()); | |
| 251 } | |
| 252 | |
| 253 objArrayHandle methods(THREAD, _klass->methods()); | |
| 254 int num_methods = methods->length(); | |
| 255 | |
| 256 for (int index = 0; index < num_methods; index++) { | |
| 257 methodOop m = (methodOop)methods->obj_at(index); | |
| 258 if (m->is_native() || m->is_abstract()) { | |
| 259 // If m is native or abstract, skip it. It is checked in class file | |
| 260 // parser that methods do not override a final method. | |
| 261 continue; | |
| 262 } | |
| 263 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
| 268 ResourceMark rm(THREAD); | |
| 269 _method = m; // initialize _method | |
| 270 if (_verify_verbose) { | |
| 271 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
| 272 } | |
| 273 | |
| 274 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
| 275 | |
| 276 int32_t max_stack = m->max_stack(); | |
| 277 int32_t max_locals = m->max_locals(); | |
| 278 constantPoolHandle cp(THREAD, m->constants()); | |
| 279 | |
| 280 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
| 281 class_format_error("Invalid method signature"); | |
| 282 return; | |
| 283 } | |
| 284 | |
| 285 // Initial stack map frame: offset is 0, stack is initially empty. | |
| 286 StackMapFrame current_frame(max_locals, max_stack, this); | |
| 287 // Set initial locals | |
| 288 VerificationType return_type = current_frame.set_locals_from_arg( | |
| 289 m, current_type(), CHECK_VERIFY(this)); | |
| 290 | |
| 291 int32_t stackmap_index = 0; // index to the stackmap array | |
| 292 | |
| 293 u4 code_length = m->code_size(); | |
| 294 | |
| 295 // Scan the bytecode and map each instruction's start offset to a number. | |
| 296 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
| 297 | |
| 298 int ex_min = code_length; | |
| 299 int ex_max = -1; | |
| 300 // Look through each item on the exception table. Each of the fields must refer | |
| 301 // to a legal instruction. | |
| 302 verify_exception_handler_table( | |
| 303 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
| 304 | |
| 305 // Look through each entry on the local variable table and make sure | |
| 306 // its range of code array offsets is valid. (4169817) | |
| 307 if (m->has_localvariable_table()) { | |
| 308 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
| 309 } | |
| 310 | |
| 311 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
| 312 StackMapStream stream(stackmap_data); | |
| 313 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
| 314 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
| 315 code_data, code_length, CHECK_VERIFY(this)); | |
| 316 | |
| 317 if (_verify_verbose) { | |
| 318 stackmap_table.print(); | |
| 319 } | |
| 320 | |
| 321 RawBytecodeStream bcs(m); | |
| 322 | |
| 323 // Scan the byte code linearly from the start to the end | |
| 324 bool no_control_flow = false; // Set to true when there is no direct control | |
| 325 // flow from current instruction to the next | |
| 326 // instruction in sequence | |
| 327 Bytecodes::Code opcode; | |
| 328 while (!bcs.is_last_bytecode()) { | |
| 329 opcode = bcs.raw_next(); | |
| 330 u2 bci = bcs.bci(); | |
| 331 | |
| 332 // Set current frame's offset to bci | |
| 333 current_frame.set_offset(bci); | |
| 334 | |
| 335 // Make sure every offset in stackmap table point to the beginning to | |
| 336 // an instruction. Match current_frame to stackmap_table entry with | |
| 337 // the same offset if exists. | |
| 338 stackmap_index = verify_stackmap_table( | |
| 339 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
| 340 no_control_flow, CHECK_VERIFY(this)); | |
| 341 | |
| 342 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
| 343 | |
| 344 // Merge with the next instruction | |
| 345 { | |
| 346 u2 index; | |
| 347 int target; | |
| 348 VerificationType type, type2; | |
| 349 VerificationType atype; | |
| 350 | |
| 351 #ifndef PRODUCT | |
| 352 if (_verify_verbose) { | |
| 353 current_frame.print(); | |
| 354 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
| 355 } | |
| 356 #endif | |
| 357 | |
| 358 // Make sure wide instruction is in correct format | |
| 359 if (bcs.is_wide()) { | |
| 360 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
| 361 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
| 362 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
| 363 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
| 364 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
| 365 opcode != Bytecodes::_dstore) { | |
| 366 verify_error(bci, "Bad wide instruction"); | |
| 367 return; | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 switch (opcode) { | |
| 372 case Bytecodes::_nop : | |
| 373 no_control_flow = false; break; | |
| 374 case Bytecodes::_aconst_null : | |
| 375 current_frame.push_stack( | |
| 376 VerificationType::null_type(), CHECK_VERIFY(this)); | |
| 377 no_control_flow = false; break; | |
| 378 case Bytecodes::_iconst_m1 : | |
| 379 case Bytecodes::_iconst_0 : | |
| 380 case Bytecodes::_iconst_1 : | |
| 381 case Bytecodes::_iconst_2 : | |
| 382 case Bytecodes::_iconst_3 : | |
| 383 case Bytecodes::_iconst_4 : | |
| 384 case Bytecodes::_iconst_5 : | |
| 385 current_frame.push_stack( | |
| 386 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 387 no_control_flow = false; break; | |
| 388 case Bytecodes::_lconst_0 : | |
| 389 case Bytecodes::_lconst_1 : | |
| 390 current_frame.push_stack_2( | |
| 391 VerificationType::long_type(), | |
| 392 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 393 no_control_flow = false; break; | |
| 394 case Bytecodes::_fconst_0 : | |
| 395 case Bytecodes::_fconst_1 : | |
| 396 case Bytecodes::_fconst_2 : | |
| 397 current_frame.push_stack( | |
| 398 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 399 no_control_flow = false; break; | |
| 400 case Bytecodes::_dconst_0 : | |
| 401 case Bytecodes::_dconst_1 : | |
| 402 current_frame.push_stack_2( | |
| 403 VerificationType::double_type(), | |
| 404 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 405 no_control_flow = false; break; | |
| 406 case Bytecodes::_sipush : | |
| 407 case Bytecodes::_bipush : | |
| 408 current_frame.push_stack( | |
| 409 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 410 no_control_flow = false; break; | |
| 411 case Bytecodes::_ldc : | |
| 412 verify_ldc( | |
| 413 opcode, bcs.get_index(), ¤t_frame, | |
| 414 cp, bci, CHECK_VERIFY(this)); | |
| 415 no_control_flow = false; break; | |
| 416 case Bytecodes::_ldc_w : | |
| 417 case Bytecodes::_ldc2_w : | |
| 418 verify_ldc( | |
| 419 opcode, bcs.get_index_big(), ¤t_frame, | |
| 420 cp, bci, CHECK_VERIFY(this)); | |
| 421 no_control_flow = false; break; | |
| 422 case Bytecodes::_iload : | |
| 423 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 424 no_control_flow = false; break; | |
| 425 case Bytecodes::_iload_0 : | |
| 426 case Bytecodes::_iload_1 : | |
| 427 case Bytecodes::_iload_2 : | |
| 428 case Bytecodes::_iload_3 : | |
| 429 index = opcode - Bytecodes::_iload_0; | |
| 430 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 431 no_control_flow = false; break; | |
| 432 case Bytecodes::_lload : | |
| 433 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 434 no_control_flow = false; break; | |
| 435 case Bytecodes::_lload_0 : | |
| 436 case Bytecodes::_lload_1 : | |
| 437 case Bytecodes::_lload_2 : | |
| 438 case Bytecodes::_lload_3 : | |
| 439 index = opcode - Bytecodes::_lload_0; | |
| 440 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 441 no_control_flow = false; break; | |
| 442 case Bytecodes::_fload : | |
| 443 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 444 no_control_flow = false; break; | |
| 445 case Bytecodes::_fload_0 : | |
| 446 case Bytecodes::_fload_1 : | |
| 447 case Bytecodes::_fload_2 : | |
| 448 case Bytecodes::_fload_3 : | |
| 449 index = opcode - Bytecodes::_fload_0; | |
| 450 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 451 no_control_flow = false; break; | |
| 452 case Bytecodes::_dload : | |
| 453 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 454 no_control_flow = false; break; | |
| 455 case Bytecodes::_dload_0 : | |
| 456 case Bytecodes::_dload_1 : | |
| 457 case Bytecodes::_dload_2 : | |
| 458 case Bytecodes::_dload_3 : | |
| 459 index = opcode - Bytecodes::_dload_0; | |
| 460 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 461 no_control_flow = false; break; | |
| 462 case Bytecodes::_aload : | |
| 463 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 464 no_control_flow = false; break; | |
| 465 case Bytecodes::_aload_0 : | |
| 466 case Bytecodes::_aload_1 : | |
| 467 case Bytecodes::_aload_2 : | |
| 468 case Bytecodes::_aload_3 : | |
| 469 index = opcode - Bytecodes::_aload_0; | |
| 470 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 471 no_control_flow = false; break; | |
| 472 case Bytecodes::_iaload : | |
| 473 type = current_frame.pop_stack( | |
| 474 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 475 atype = current_frame.pop_stack( | |
| 476 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 477 if (!atype.is_int_array()) { | |
| 478 verify_error(bci, bad_type_msg, "iaload"); | |
| 479 return; | |
| 480 } | |
| 481 current_frame.push_stack( | |
| 482 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 483 no_control_flow = false; break; | |
| 484 case Bytecodes::_baload : | |
| 485 type = current_frame.pop_stack( | |
| 486 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 487 atype = current_frame.pop_stack( | |
| 488 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 489 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
| 490 verify_error(bci, bad_type_msg, "baload"); | |
| 491 return; | |
| 492 } | |
| 493 current_frame.push_stack( | |
| 494 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 495 no_control_flow = false; break; | |
| 496 case Bytecodes::_caload : | |
| 497 type = current_frame.pop_stack( | |
| 498 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 499 atype = current_frame.pop_stack( | |
| 500 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 501 if (!atype.is_char_array()) { | |
| 502 verify_error(bci, bad_type_msg, "caload"); | |
| 503 return; | |
| 504 } | |
| 505 current_frame.push_stack( | |
| 506 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 507 no_control_flow = false; break; | |
| 508 case Bytecodes::_saload : | |
| 509 type = current_frame.pop_stack( | |
| 510 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 511 atype = current_frame.pop_stack( | |
| 512 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 513 if (!atype.is_short_array()) { | |
| 514 verify_error(bci, bad_type_msg, "saload"); | |
| 515 return; | |
| 516 } | |
| 517 current_frame.push_stack( | |
| 518 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 519 no_control_flow = false; break; | |
| 520 case Bytecodes::_laload : | |
| 521 type = current_frame.pop_stack( | |
| 522 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 523 atype = current_frame.pop_stack( | |
| 524 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 525 if (!atype.is_long_array()) { | |
| 526 verify_error(bci, bad_type_msg, "laload"); | |
| 527 return; | |
| 528 } | |
| 529 current_frame.push_stack_2( | |
| 530 VerificationType::long_type(), | |
| 531 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 532 no_control_flow = false; break; | |
| 533 case Bytecodes::_faload : | |
| 534 type = current_frame.pop_stack( | |
| 535 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 536 atype = current_frame.pop_stack( | |
| 537 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 538 if (!atype.is_float_array()) { | |
| 539 verify_error(bci, bad_type_msg, "faload"); | |
| 540 return; | |
| 541 } | |
| 542 current_frame.push_stack( | |
| 543 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 544 no_control_flow = false; break; | |
| 545 case Bytecodes::_daload : | |
| 546 type = current_frame.pop_stack( | |
| 547 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 548 atype = current_frame.pop_stack( | |
| 549 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 550 if (!atype.is_double_array()) { | |
| 551 verify_error(bci, bad_type_msg, "daload"); | |
| 552 return; | |
| 553 } | |
| 554 current_frame.push_stack_2( | |
| 555 VerificationType::double_type(), | |
| 556 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 557 no_control_flow = false; break; | |
| 558 case Bytecodes::_aaload : { | |
| 559 type = current_frame.pop_stack( | |
| 560 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 561 atype = current_frame.pop_stack( | |
| 562 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 563 if (!atype.is_reference_array()) { | |
| 564 verify_error(bci, bad_type_msg, "aaload"); | |
| 565 return; | |
| 566 } | |
| 567 if (atype.is_null()) { | |
| 568 current_frame.push_stack( | |
| 569 VerificationType::null_type(), CHECK_VERIFY(this)); | |
| 570 } else { | |
| 571 VerificationType component = | |
| 572 atype.get_component(CHECK_VERIFY(this)); | |
| 573 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
| 574 } | |
| 575 no_control_flow = false; break; | |
| 576 } | |
| 577 case Bytecodes::_istore : | |
| 578 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 579 no_control_flow = false; break; | |
| 580 case Bytecodes::_istore_0 : | |
| 581 case Bytecodes::_istore_1 : | |
| 582 case Bytecodes::_istore_2 : | |
| 583 case Bytecodes::_istore_3 : | |
| 584 index = opcode - Bytecodes::_istore_0; | |
| 585 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 586 no_control_flow = false; break; | |
| 587 case Bytecodes::_lstore : | |
| 588 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 589 no_control_flow = false; break; | |
| 590 case Bytecodes::_lstore_0 : | |
| 591 case Bytecodes::_lstore_1 : | |
| 592 case Bytecodes::_lstore_2 : | |
| 593 case Bytecodes::_lstore_3 : | |
| 594 index = opcode - Bytecodes::_lstore_0; | |
| 595 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 596 no_control_flow = false; break; | |
| 597 case Bytecodes::_fstore : | |
| 598 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 599 no_control_flow = false; break; | |
| 600 case Bytecodes::_fstore_0 : | |
| 601 case Bytecodes::_fstore_1 : | |
| 602 case Bytecodes::_fstore_2 : | |
| 603 case Bytecodes::_fstore_3 : | |
| 604 index = opcode - Bytecodes::_fstore_0; | |
| 605 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 606 no_control_flow = false; break; | |
| 607 case Bytecodes::_dstore : | |
| 608 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 609 no_control_flow = false; break; | |
| 610 case Bytecodes::_dstore_0 : | |
| 611 case Bytecodes::_dstore_1 : | |
| 612 case Bytecodes::_dstore_2 : | |
| 613 case Bytecodes::_dstore_3 : | |
| 614 index = opcode - Bytecodes::_dstore_0; | |
| 615 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 616 no_control_flow = false; break; | |
| 617 case Bytecodes::_astore : | |
| 618 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 619 no_control_flow = false; break; | |
| 620 case Bytecodes::_astore_0 : | |
| 621 case Bytecodes::_astore_1 : | |
| 622 case Bytecodes::_astore_2 : | |
| 623 case Bytecodes::_astore_3 : | |
| 624 index = opcode - Bytecodes::_astore_0; | |
| 625 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
| 626 no_control_flow = false; break; | |
| 627 case Bytecodes::_iastore : | |
| 628 type = current_frame.pop_stack( | |
| 629 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 630 type2 = current_frame.pop_stack( | |
| 631 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 632 atype = current_frame.pop_stack( | |
| 633 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 634 if (!atype.is_int_array()) { | |
| 635 verify_error(bci, bad_type_msg, "iastore"); | |
| 636 return; | |
| 637 } | |
| 638 no_control_flow = false; break; | |
| 639 case Bytecodes::_bastore : | |
| 640 type = current_frame.pop_stack( | |
| 641 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 642 type2 = current_frame.pop_stack( | |
| 643 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 644 atype = current_frame.pop_stack( | |
| 645 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 646 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
| 647 verify_error(bci, bad_type_msg, "bastore"); | |
| 648 return; | |
| 649 } | |
| 650 no_control_flow = false; break; | |
| 651 case Bytecodes::_castore : | |
| 652 current_frame.pop_stack( | |
| 653 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 654 current_frame.pop_stack( | |
| 655 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 656 atype = current_frame.pop_stack( | |
| 657 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 658 if (!atype.is_char_array()) { | |
| 659 verify_error(bci, bad_type_msg, "castore"); | |
| 660 return; | |
| 661 } | |
| 662 no_control_flow = false; break; | |
| 663 case Bytecodes::_sastore : | |
| 664 current_frame.pop_stack( | |
| 665 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 666 current_frame.pop_stack( | |
| 667 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 668 atype = current_frame.pop_stack( | |
| 669 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 670 if (!atype.is_short_array()) { | |
| 671 verify_error(bci, bad_type_msg, "sastore"); | |
| 672 return; | |
| 673 } | |
| 674 no_control_flow = false; break; | |
| 675 case Bytecodes::_lastore : | |
| 676 current_frame.pop_stack_2( | |
| 677 VerificationType::long2_type(), | |
| 678 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 679 current_frame.pop_stack( | |
| 680 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 681 atype = current_frame.pop_stack( | |
| 682 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 683 if (!atype.is_long_array()) { | |
| 684 verify_error(bci, bad_type_msg, "lastore"); | |
| 685 return; | |
| 686 } | |
| 687 no_control_flow = false; break; | |
| 688 case Bytecodes::_fastore : | |
| 689 current_frame.pop_stack( | |
| 690 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 691 current_frame.pop_stack | |
| 692 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 693 atype = current_frame.pop_stack( | |
| 694 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 695 if (!atype.is_float_array()) { | |
| 696 verify_error(bci, bad_type_msg, "fastore"); | |
| 697 return; | |
| 698 } | |
| 699 no_control_flow = false; break; | |
| 700 case Bytecodes::_dastore : | |
| 701 current_frame.pop_stack_2( | |
| 702 VerificationType::double2_type(), | |
| 703 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 704 current_frame.pop_stack( | |
| 705 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 706 atype = current_frame.pop_stack( | |
| 707 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 708 if (!atype.is_double_array()) { | |
| 709 verify_error(bci, bad_type_msg, "dastore"); | |
| 710 return; | |
| 711 } | |
| 712 no_control_flow = false; break; | |
| 713 case Bytecodes::_aastore : | |
| 714 type = current_frame.pop_stack( | |
| 715 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 716 type2 = current_frame.pop_stack( | |
| 717 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 718 atype = current_frame.pop_stack( | |
| 719 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 720 // more type-checking is done at runtime | |
| 721 if (!atype.is_reference_array()) { | |
| 722 verify_error(bci, bad_type_msg, "aastore"); | |
| 723 return; | |
| 724 } | |
| 725 // 4938384: relaxed constraint in JVMS 3nd edition. | |
| 726 no_control_flow = false; break; | |
| 727 case Bytecodes::_pop : | |
| 728 current_frame.pop_stack( | |
| 729 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 730 no_control_flow = false; break; | |
| 731 case Bytecodes::_pop2 : | |
| 732 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
| 733 if (type.is_category1()) { | |
| 734 current_frame.pop_stack( | |
| 735 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 736 } else if (type.is_category2_2nd()) { | |
| 737 current_frame.pop_stack( | |
| 738 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
| 739 } else { | |
| 740 verify_error(bci, bad_type_msg, "pop2"); | |
| 741 return; | |
| 742 } | |
| 743 no_control_flow = false; break; | |
| 744 case Bytecodes::_dup : | |
| 745 type = current_frame.pop_stack( | |
| 746 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 747 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 748 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 749 no_control_flow = false; break; | |
| 750 case Bytecodes::_dup_x1 : | |
| 751 type = current_frame.pop_stack( | |
| 752 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 753 type2 = current_frame.pop_stack( | |
| 754 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 755 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 756 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 757 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 758 no_control_flow = false; break; | |
| 759 case Bytecodes::_dup_x2 : | |
| 760 { | |
| 761 VerificationType type3; | |
| 762 type = current_frame.pop_stack( | |
| 763 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 764 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
| 765 if (type2.is_category1()) { | |
| 766 type3 = current_frame.pop_stack( | |
| 767 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 768 } else if (type2.is_category2_2nd()) { | |
| 769 type3 = current_frame.pop_stack( | |
| 770 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
| 771 } else { | |
| 772 verify_error(bci, bad_type_msg, "dup_x2"); | |
| 773 return; | |
| 774 } | |
| 775 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 776 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
| 777 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 778 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 779 no_control_flow = false; break; | |
| 780 } | |
| 781 case Bytecodes::_dup2 : | |
| 782 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
| 783 if (type.is_category1()) { | |
| 784 type2 = current_frame.pop_stack( | |
| 785 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 786 } else if (type.is_category2_2nd()) { | |
| 787 type2 = current_frame.pop_stack( | |
| 788 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
| 789 } else { | |
| 790 verify_error(bci, bad_type_msg, "dup2"); | |
| 791 return; | |
| 792 } | |
| 793 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 794 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 795 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 796 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 797 no_control_flow = false; break; | |
| 798 case Bytecodes::_dup2_x1 : | |
| 799 { | |
| 800 VerificationType type3; | |
| 801 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
| 802 if (type.is_category1()) { | |
| 803 type2 = current_frame.pop_stack( | |
| 804 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 805 } else if(type.is_category2_2nd()) { | |
| 806 type2 = current_frame.pop_stack | |
| 807 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
| 808 } else { | |
| 809 verify_error(bci, bad_type_msg, "dup2_x1"); | |
| 810 return; | |
| 811 } | |
| 812 type3 = current_frame.pop_stack( | |
| 813 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 814 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 815 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 816 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
| 817 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 818 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 819 no_control_flow = false; break; | |
| 820 } | |
| 821 case Bytecodes::_dup2_x2 : | |
| 822 { | |
| 823 VerificationType type3, type4; | |
| 824 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
| 825 if (type.is_category1()) { | |
| 826 type2 = current_frame.pop_stack( | |
| 827 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 828 } else if (type.is_category2_2nd()) { | |
| 829 type2 = current_frame.pop_stack( | |
| 830 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
| 831 } else { | |
| 832 verify_error(bci, bad_type_msg, "dup2_x2"); | |
| 833 return; | |
| 834 } | |
| 835 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
| 836 if (type3.is_category1()) { | |
| 837 type4 = current_frame.pop_stack( | |
| 838 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 839 } else if (type3.is_category2_2nd()) { | |
| 840 type4 = current_frame.pop_stack( | |
| 841 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
| 842 } else { | |
| 843 verify_error(bci, bad_type_msg, "dup2_x2"); | |
| 844 return; | |
| 845 } | |
| 846 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 847 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 848 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
| 849 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
| 850 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 851 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 852 no_control_flow = false; break; | |
| 853 } | |
| 854 case Bytecodes::_swap : | |
| 855 type = current_frame.pop_stack( | |
| 856 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 857 type2 = current_frame.pop_stack( | |
| 858 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
| 859 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 860 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
| 861 no_control_flow = false; break; | |
| 862 case Bytecodes::_iadd : | |
| 863 case Bytecodes::_isub : | |
| 864 case Bytecodes::_imul : | |
| 865 case Bytecodes::_idiv : | |
| 866 case Bytecodes::_irem : | |
| 867 case Bytecodes::_ishl : | |
| 868 case Bytecodes::_ishr : | |
| 869 case Bytecodes::_iushr : | |
| 870 case Bytecodes::_ior : | |
| 871 case Bytecodes::_ixor : | |
| 872 case Bytecodes::_iand : | |
| 873 current_frame.pop_stack( | |
| 874 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 875 // fall through | |
| 876 case Bytecodes::_ineg : | |
| 877 current_frame.pop_stack( | |
| 878 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 879 current_frame.push_stack( | |
| 880 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 881 no_control_flow = false; break; | |
| 882 case Bytecodes::_ladd : | |
| 883 case Bytecodes::_lsub : | |
| 884 case Bytecodes::_lmul : | |
| 885 case Bytecodes::_ldiv : | |
| 886 case Bytecodes::_lrem : | |
| 887 case Bytecodes::_land : | |
| 888 case Bytecodes::_lor : | |
| 889 case Bytecodes::_lxor : | |
| 890 current_frame.pop_stack_2( | |
| 891 VerificationType::long2_type(), | |
| 892 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 893 // fall through | |
| 894 case Bytecodes::_lneg : | |
| 895 current_frame.pop_stack_2( | |
| 896 VerificationType::long2_type(), | |
| 897 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 898 current_frame.push_stack_2( | |
| 899 VerificationType::long_type(), | |
| 900 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 901 no_control_flow = false; break; | |
| 902 case Bytecodes::_lshl : | |
| 903 case Bytecodes::_lshr : | |
| 904 case Bytecodes::_lushr : | |
| 905 current_frame.pop_stack( | |
| 906 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 907 current_frame.pop_stack_2( | |
| 908 VerificationType::long2_type(), | |
| 909 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 910 current_frame.push_stack_2( | |
| 911 VerificationType::long_type(), | |
| 912 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 913 no_control_flow = false; break; | |
| 914 case Bytecodes::_fadd : | |
| 915 case Bytecodes::_fsub : | |
| 916 case Bytecodes::_fmul : | |
| 917 case Bytecodes::_fdiv : | |
| 918 case Bytecodes::_frem : | |
| 919 current_frame.pop_stack( | |
| 920 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 921 // fall through | |
| 922 case Bytecodes::_fneg : | |
| 923 current_frame.pop_stack( | |
| 924 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 925 current_frame.push_stack( | |
| 926 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 927 no_control_flow = false; break; | |
| 928 case Bytecodes::_dadd : | |
| 929 case Bytecodes::_dsub : | |
| 930 case Bytecodes::_dmul : | |
| 931 case Bytecodes::_ddiv : | |
| 932 case Bytecodes::_drem : | |
| 933 current_frame.pop_stack_2( | |
| 934 VerificationType::double2_type(), | |
| 935 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 936 // fall through | |
| 937 case Bytecodes::_dneg : | |
| 938 current_frame.pop_stack_2( | |
| 939 VerificationType::double2_type(), | |
| 940 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 941 current_frame.push_stack_2( | |
| 942 VerificationType::double_type(), | |
| 943 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 944 no_control_flow = false; break; | |
| 945 case Bytecodes::_iinc : | |
| 946 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
| 947 no_control_flow = false; break; | |
| 948 case Bytecodes::_i2l : | |
| 949 type = current_frame.pop_stack( | |
| 950 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 951 current_frame.push_stack_2( | |
| 952 VerificationType::long_type(), | |
| 953 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 954 no_control_flow = false; break; | |
| 955 case Bytecodes::_l2i : | |
| 956 current_frame.pop_stack_2( | |
| 957 VerificationType::long2_type(), | |
| 958 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 959 current_frame.push_stack( | |
| 960 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 961 no_control_flow = false; break; | |
| 962 case Bytecodes::_i2f : | |
| 963 current_frame.pop_stack( | |
| 964 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 965 current_frame.push_stack( | |
| 966 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 967 no_control_flow = false; break; | |
| 968 case Bytecodes::_i2d : | |
| 969 current_frame.pop_stack( | |
| 970 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 971 current_frame.push_stack_2( | |
| 972 VerificationType::double_type(), | |
| 973 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 974 no_control_flow = false; break; | |
| 975 case Bytecodes::_l2f : | |
| 976 current_frame.pop_stack_2( | |
| 977 VerificationType::long2_type(), | |
| 978 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 979 current_frame.push_stack( | |
| 980 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 981 no_control_flow = false; break; | |
| 982 case Bytecodes::_l2d : | |
| 983 current_frame.pop_stack_2( | |
| 984 VerificationType::long2_type(), | |
| 985 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 986 current_frame.push_stack_2( | |
| 987 VerificationType::double_type(), | |
| 988 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 989 no_control_flow = false; break; | |
| 990 case Bytecodes::_f2i : | |
| 991 current_frame.pop_stack( | |
| 992 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 993 current_frame.push_stack( | |
| 994 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 995 no_control_flow = false; break; | |
| 996 case Bytecodes::_f2l : | |
| 997 current_frame.pop_stack( | |
| 998 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 999 current_frame.push_stack_2( | |
| 1000 VerificationType::long_type(), | |
| 1001 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 1002 no_control_flow = false; break; | |
| 1003 case Bytecodes::_f2d : | |
| 1004 current_frame.pop_stack( | |
| 1005 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 1006 current_frame.push_stack_2( | |
| 1007 VerificationType::double_type(), | |
| 1008 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 1009 no_control_flow = false; break; | |
| 1010 case Bytecodes::_d2i : | |
| 1011 current_frame.pop_stack_2( | |
| 1012 VerificationType::double2_type(), | |
| 1013 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 1014 current_frame.push_stack( | |
| 1015 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1016 no_control_flow = false; break; | |
| 1017 case Bytecodes::_d2l : | |
| 1018 current_frame.pop_stack_2( | |
| 1019 VerificationType::double2_type(), | |
| 1020 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 1021 current_frame.push_stack_2( | |
| 1022 VerificationType::long_type(), | |
| 1023 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 1024 no_control_flow = false; break; | |
| 1025 case Bytecodes::_d2f : | |
| 1026 current_frame.pop_stack_2( | |
| 1027 VerificationType::double2_type(), | |
| 1028 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 1029 current_frame.push_stack( | |
| 1030 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 1031 no_control_flow = false; break; | |
| 1032 case Bytecodes::_i2b : | |
| 1033 case Bytecodes::_i2c : | |
| 1034 case Bytecodes::_i2s : | |
| 1035 current_frame.pop_stack( | |
| 1036 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1037 current_frame.push_stack( | |
| 1038 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1039 no_control_flow = false; break; | |
| 1040 case Bytecodes::_lcmp : | |
| 1041 current_frame.pop_stack_2( | |
| 1042 VerificationType::long2_type(), | |
| 1043 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 1044 current_frame.pop_stack_2( | |
| 1045 VerificationType::long2_type(), | |
| 1046 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 1047 current_frame.push_stack( | |
| 1048 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1049 no_control_flow = false; break; | |
| 1050 case Bytecodes::_fcmpl : | |
| 1051 case Bytecodes::_fcmpg : | |
| 1052 current_frame.pop_stack( | |
| 1053 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 1054 current_frame.pop_stack( | |
| 1055 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 1056 current_frame.push_stack( | |
| 1057 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1058 no_control_flow = false; break; | |
| 1059 case Bytecodes::_dcmpl : | |
| 1060 case Bytecodes::_dcmpg : | |
| 1061 current_frame.pop_stack_2( | |
| 1062 VerificationType::double2_type(), | |
| 1063 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 1064 current_frame.pop_stack_2( | |
| 1065 VerificationType::double2_type(), | |
| 1066 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 1067 current_frame.push_stack( | |
| 1068 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1069 no_control_flow = false; break; | |
| 1070 case Bytecodes::_if_icmpeq: | |
| 1071 case Bytecodes::_if_icmpne: | |
| 1072 case Bytecodes::_if_icmplt: | |
| 1073 case Bytecodes::_if_icmpge: | |
| 1074 case Bytecodes::_if_icmpgt: | |
| 1075 case Bytecodes::_if_icmple: | |
| 1076 current_frame.pop_stack( | |
| 1077 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1078 // fall through | |
| 1079 case Bytecodes::_ifeq: | |
| 1080 case Bytecodes::_ifne: | |
| 1081 case Bytecodes::_iflt: | |
| 1082 case Bytecodes::_ifge: | |
| 1083 case Bytecodes::_ifgt: | |
| 1084 case Bytecodes::_ifle: | |
| 1085 current_frame.pop_stack( | |
| 1086 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1087 target = bcs.dest(); | |
| 1088 stackmap_table.check_jump_target( | |
| 1089 ¤t_frame, target, CHECK_VERIFY(this)); | |
| 1090 no_control_flow = false; break; | |
| 1091 case Bytecodes::_if_acmpeq : | |
| 1092 case Bytecodes::_if_acmpne : | |
| 1093 current_frame.pop_stack( | |
| 1094 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1095 // fall through | |
| 1096 case Bytecodes::_ifnull : | |
| 1097 case Bytecodes::_ifnonnull : | |
| 1098 current_frame.pop_stack( | |
| 1099 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1100 target = bcs.dest(); | |
| 1101 stackmap_table.check_jump_target | |
| 1102 (¤t_frame, target, CHECK_VERIFY(this)); | |
| 1103 no_control_flow = false; break; | |
| 1104 case Bytecodes::_goto : | |
| 1105 target = bcs.dest(); | |
| 1106 stackmap_table.check_jump_target( | |
| 1107 ¤t_frame, target, CHECK_VERIFY(this)); | |
| 1108 no_control_flow = true; break; | |
| 1109 case Bytecodes::_goto_w : | |
| 1110 target = bcs.dest_w(); | |
| 1111 stackmap_table.check_jump_target( | |
| 1112 ¤t_frame, target, CHECK_VERIFY(this)); | |
| 1113 no_control_flow = true; break; | |
| 1114 case Bytecodes::_tableswitch : | |
| 1115 case Bytecodes::_lookupswitch : | |
| 1116 verify_switch( | |
| 1117 &bcs, code_length, code_data, ¤t_frame, | |
| 1118 &stackmap_table, CHECK_VERIFY(this)); | |
| 1119 no_control_flow = true; break; | |
| 1120 case Bytecodes::_ireturn : | |
| 1121 type = current_frame.pop_stack( | |
| 1122 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1123 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
| 1124 no_control_flow = true; break; | |
| 1125 case Bytecodes::_lreturn : | |
| 1126 type2 = current_frame.pop_stack( | |
| 1127 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 1128 type = current_frame.pop_stack( | |
| 1129 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 1130 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
| 1131 no_control_flow = true; break; | |
| 1132 case Bytecodes::_freturn : | |
| 1133 type = current_frame.pop_stack( | |
| 1134 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 1135 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
| 1136 no_control_flow = true; break; | |
| 1137 case Bytecodes::_dreturn : | |
| 1138 type2 = current_frame.pop_stack( | |
| 1139 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 1140 type = current_frame.pop_stack( | |
| 1141 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 1142 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
| 1143 no_control_flow = true; break; | |
| 1144 case Bytecodes::_areturn : | |
| 1145 type = current_frame.pop_stack( | |
| 1146 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1147 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
| 1148 no_control_flow = true; break; | |
| 1149 case Bytecodes::_return : | |
| 1150 if (return_type != VerificationType::bogus_type()) { | |
| 1151 verify_error(bci, "Method expects no return value"); | |
| 1152 return; | |
| 1153 } | |
| 1154 // Make sure "this" has been initialized if current method is an | |
| 1155 // <init> | |
| 1156 if (_method->name() == vmSymbols::object_initializer_name() && | |
| 1157 current_frame.flag_this_uninit()) { | |
| 1158 verify_error(bci, | |
| 1159 "Constructor must call super() or this() before return"); | |
| 1160 return; | |
| 1161 } | |
| 1162 no_control_flow = true; break; | |
| 1163 case Bytecodes::_getstatic : | |
| 1164 case Bytecodes::_putstatic : | |
| 1165 case Bytecodes::_getfield : | |
| 1166 case Bytecodes::_putfield : | |
| 1167 verify_field_instructions( | |
| 1168 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
| 1169 no_control_flow = false; break; | |
| 1170 case Bytecodes::_invokevirtual : | |
| 1171 case Bytecodes::_invokespecial : | |
| 1172 case Bytecodes::_invokestatic : | |
| 1173 verify_invoke_instructions( | |
| 1174 &bcs, code_length, ¤t_frame, | |
| 1175 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
| 1176 no_control_flow = false; break; | |
| 1177 case Bytecodes::_invokeinterface : | |
|
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6655646: dynamic languages need dynamically linked call sites
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431
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changeset
|
1178 case Bytecodes::_invokedynamic : |
| 0 | 1179 verify_invoke_instructions( |
| 1180 &bcs, code_length, ¤t_frame, | |
| 1181 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
| 1182 no_control_flow = false; break; | |
| 1183 case Bytecodes::_new : | |
| 1184 { | |
| 1185 index = bcs.get_index_big(); | |
| 1186 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
| 1187 VerificationType new_class_type = | |
| 1188 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
| 1189 if (!new_class_type.is_object()) { | |
| 1190 verify_error(bci, "Illegal new instruction"); | |
| 1191 return; | |
| 1192 } | |
| 1193 type = VerificationType::uninitialized_type(bci); | |
| 1194 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 1195 no_control_flow = false; break; | |
| 1196 } | |
| 1197 case Bytecodes::_newarray : | |
| 1198 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
| 1199 current_frame.pop_stack( | |
| 1200 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1201 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
| 1202 no_control_flow = false; break; | |
| 1203 case Bytecodes::_anewarray : | |
| 1204 verify_anewarray( | |
| 1205 bcs.get_index_big(), cp, ¤t_frame, CHECK_VERIFY(this)); | |
| 1206 no_control_flow = false; break; | |
| 1207 case Bytecodes::_arraylength : | |
| 1208 type = current_frame.pop_stack( | |
| 1209 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
|
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0
diff
changeset
|
1210 if (!(type.is_null() || type.is_array())) { |
| 0 | 1211 verify_error(bci, bad_type_msg, "arraylength"); |
| 1212 } | |
| 1213 current_frame.push_stack( | |
| 1214 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1215 no_control_flow = false; break; | |
| 1216 case Bytecodes::_checkcast : | |
| 1217 { | |
| 1218 index = bcs.get_index_big(); | |
| 1219 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
| 1220 current_frame.pop_stack( | |
| 1221 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1222 VerificationType klass_type = cp_index_to_type( | |
| 1223 index, cp, CHECK_VERIFY(this)); | |
| 1224 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
| 1225 no_control_flow = false; break; | |
| 1226 } | |
| 1227 case Bytecodes::_instanceof : { | |
| 1228 index = bcs.get_index_big(); | |
| 1229 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
| 1230 current_frame.pop_stack( | |
| 1231 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1232 current_frame.push_stack( | |
| 1233 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1234 no_control_flow = false; break; | |
| 1235 } | |
| 1236 case Bytecodes::_monitorenter : | |
| 1237 case Bytecodes::_monitorexit : | |
| 1238 current_frame.pop_stack( | |
| 1239 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1240 no_control_flow = false; break; | |
| 1241 case Bytecodes::_multianewarray : | |
| 1242 { | |
| 1243 index = bcs.get_index_big(); | |
| 1244 u2 dim = *(bcs.bcp()+3); | |
| 1245 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
| 1246 VerificationType new_array_type = | |
| 1247 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
| 1248 if (!new_array_type.is_array()) { | |
| 1249 verify_error(bci, | |
| 1250 "Illegal constant pool index in multianewarray instruction"); | |
| 1251 return; | |
| 1252 } | |
| 1253 if (dim < 1 || new_array_type.dimensions() < dim) { | |
| 1254 verify_error(bci, | |
| 1255 "Illegal dimension in multianewarray instruction"); | |
| 1256 return; | |
| 1257 } | |
| 1258 for (int i = 0; i < dim; i++) { | |
| 1259 current_frame.pop_stack( | |
| 1260 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1261 } | |
| 1262 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
| 1263 no_control_flow = false; break; | |
| 1264 } | |
| 1265 case Bytecodes::_athrow : | |
| 1266 type = VerificationType::reference_type( | |
| 1267 vmSymbols::java_lang_Throwable()); | |
| 1268 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
| 1269 no_control_flow = true; break; | |
| 1270 default: | |
| 1271 // We only need to check the valid bytecodes in class file. | |
| 1272 // And jsr and ret are not in the new class file format in JDK1.5. | |
| 1273 verify_error(bci, "Bad instruction"); | |
| 1274 no_control_flow = false; | |
| 1275 return; | |
| 1276 } // end switch | |
| 1277 } // end Merge with the next instruction | |
| 1278 | |
| 1279 // Look for possible jump target in exception handlers and see if it | |
| 1280 // matches current_frame | |
| 1281 if (bci >= ex_min && bci < ex_max) { | |
| 1282 verify_exception_handler_targets( | |
| 1283 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
| 1284 } | |
| 1285 } // end while | |
| 1286 | |
| 1287 // Make sure that control flow does not fall through end of the method | |
| 1288 if (!no_control_flow) { | |
| 1289 verify_error(code_length, "Control flow falls through code end"); | |
| 1290 return; | |
| 1291 } | |
| 1292 } | |
| 1293 | |
| 1294 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
| 1295 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
| 1296 memset(code_data, 0, sizeof(char) * code_length); | |
| 1297 RawBytecodeStream bcs(m); | |
| 1298 | |
| 1299 while (!bcs.is_last_bytecode()) { | |
| 1300 if (bcs.raw_next() != Bytecodes::_illegal) { | |
| 1301 int bci = bcs.bci(); | |
| 1302 if (bcs.code() == Bytecodes::_new) { | |
| 1303 code_data[bci] = NEW_OFFSET; | |
| 1304 } else { | |
| 1305 code_data[bci] = BYTECODE_OFFSET; | |
| 1306 } | |
| 1307 } else { | |
| 1308 verify_error(bcs.bci(), "Bad instruction"); | |
| 1309 return NULL; | |
| 1310 } | |
| 1311 } | |
| 1312 | |
| 1313 return code_data; | |
| 1314 } | |
| 1315 | |
| 1316 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
| 1317 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
| 1318 constantPoolHandle cp (THREAD, _method->constants()); | |
| 1319 | |
| 1320 if (exhandlers() != NULL) { | |
| 1321 for(int i = 0; i < exhandlers->length();) { | |
| 1322 u2 start_pc = exhandlers->int_at(i++); | |
| 1323 u2 end_pc = exhandlers->int_at(i++); | |
| 1324 u2 handler_pc = exhandlers->int_at(i++); | |
| 1325 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
| 1326 class_format_error("Illegal exception table start_pc %d", start_pc); | |
| 1327 return; | |
| 1328 } | |
| 1329 if (end_pc != code_length) { // special case: end_pc == code_length | |
| 1330 if (end_pc > code_length || code_data[end_pc] == 0) { | |
| 1331 class_format_error("Illegal exception table end_pc %d", end_pc); | |
| 1332 return; | |
| 1333 } | |
| 1334 } | |
| 1335 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
| 1336 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
| 1337 return; | |
| 1338 } | |
| 1339 int catch_type_index = exhandlers->int_at(i++); | |
| 1340 if (catch_type_index != 0) { | |
| 1341 VerificationType catch_type = cp_index_to_type( | |
| 1342 catch_type_index, cp, CHECK_VERIFY(this)); | |
| 1343 VerificationType throwable = | |
| 1344 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
| 1345 bool is_subclass = throwable.is_assignable_from( | |
| 1346 catch_type, current_class(), CHECK_VERIFY(this)); | |
| 1347 if (!is_subclass) { | |
| 1348 // 4286534: should throw VerifyError according to recent spec change | |
| 1349 verify_error( | |
| 1350 "Catch type is not a subclass of Throwable in handler %d", | |
| 1351 handler_pc); | |
| 1352 return; | |
| 1353 } | |
| 1354 } | |
| 1355 if (start_pc < min) min = start_pc; | |
| 1356 if (end_pc > max) max = end_pc; | |
| 1357 } | |
| 1358 } | |
| 1359 } | |
| 1360 | |
| 1361 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
| 1362 int localvariable_table_length = _method()->localvariable_table_length(); | |
| 1363 if (localvariable_table_length > 0) { | |
| 1364 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
| 1365 for (int i = 0; i < localvariable_table_length; i++) { | |
| 1366 u2 start_bci = table[i].start_bci; | |
| 1367 u2 length = table[i].length; | |
| 1368 | |
| 1369 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
| 1370 class_format_error( | |
| 1371 "Illegal local variable table start_pc %d", start_bci); | |
| 1372 return; | |
| 1373 } | |
| 1374 u4 end_bci = (u4)(start_bci + length); | |
| 1375 if (end_bci != code_length) { | |
| 1376 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
| 1377 class_format_error( "Illegal local variable table length %d", length); | |
| 1378 return; | |
| 1379 } | |
| 1380 } | |
| 1381 } | |
| 1382 } | |
| 1383 } | |
| 1384 | |
| 1385 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
| 1386 StackMapFrame* current_frame, | |
| 1387 StackMapTable* stackmap_table, | |
| 1388 bool no_control_flow, TRAPS) { | |
| 1389 if (stackmap_index < stackmap_table->get_frame_count()) { | |
| 1390 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
| 1391 if (no_control_flow && this_offset > bci) { | |
| 1392 verify_error(bci, "Expecting a stack map frame"); | |
| 1393 return 0; | |
| 1394 } | |
| 1395 if (this_offset == bci) { | |
| 1396 // See if current stack map can be assigned to the frame in table. | |
| 1397 // current_frame is the stackmap frame got from the last instruction. | |
| 1398 // If matched, current_frame will be updated by this method. | |
| 1399 bool match = stackmap_table->match_stackmap( | |
| 1400 current_frame, this_offset, stackmap_index, | |
| 1401 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
| 1402 if (!match) { | |
| 1403 // report type error | |
| 1404 verify_error(bci, "Instruction type does not match stack map"); | |
| 1405 return 0; | |
| 1406 } | |
| 1407 stackmap_index++; | |
| 1408 } else if (this_offset < bci) { | |
| 1409 // current_offset should have met this_offset. | |
| 1410 class_format_error("Bad stack map offset %d", this_offset); | |
| 1411 return 0; | |
| 1412 } | |
| 1413 } else if (no_control_flow) { | |
| 1414 verify_error(bci, "Expecting a stack map frame"); | |
| 1415 return 0; | |
| 1416 } | |
| 1417 return stackmap_index; | |
| 1418 } | |
| 1419 | |
| 1420 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
| 1421 StackMapTable* stackmap_table, TRAPS) { | |
| 1422 constantPoolHandle cp (THREAD, _method->constants()); | |
| 1423 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
| 1424 if (exhandlers() != NULL) { | |
| 1425 for(int i = 0; i < exhandlers->length();) { | |
| 1426 u2 start_pc = exhandlers->int_at(i++); | |
| 1427 u2 end_pc = exhandlers->int_at(i++); | |
| 1428 u2 handler_pc = exhandlers->int_at(i++); | |
| 1429 int catch_type_index = exhandlers->int_at(i++); | |
| 1430 if(bci >= start_pc && bci < end_pc) { | |
| 1431 u1 flags = current_frame->flags(); | |
| 1432 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
| 1433 | |
| 1434 ResourceMark rm(THREAD); | |
| 1435 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
| 1436 if (catch_type_index != 0) { | |
| 1437 // We know that this index refers to a subclass of Throwable | |
| 1438 VerificationType catch_type = cp_index_to_type( | |
| 1439 catch_type_index, cp, CHECK_VERIFY(this)); | |
| 1440 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
| 1441 } else { | |
| 1442 VerificationType throwable = | |
| 1443 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
| 1444 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
| 1445 } | |
| 1446 bool match = stackmap_table->match_stackmap( | |
| 1447 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
| 1448 if (!match) { | |
| 1449 verify_error(bci, | |
| 1450 "Stack map does not match the one at exception handler %d", | |
| 1451 handler_pc); | |
| 1452 return; | |
| 1453 } | |
| 1454 } | |
| 1455 } | |
| 1456 } | |
| 1457 } | |
| 1458 | |
| 1459 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
| 1460 int nconstants = cp->length(); | |
| 1461 if ((index <= 0) || (index >= nconstants)) { | |
| 1462 verify_error("Illegal constant pool index %d in class %s", | |
| 1463 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
| 1464 return; | |
| 1465 } | |
| 1466 } | |
| 1467 | |
| 1468 void ClassVerifier::verify_cp_type( | |
| 1469 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
| 1470 | |
| 1471 // In some situations, bytecode rewriting may occur while we're verifying. | |
| 1472 // In this case, a constant pool cache exists and some indices refer to that | |
| 1473 // instead. Get the original index for the tag check | |
| 1474 constantPoolCacheOop cache = cp->cache(); | |
| 1475 if (cache != NULL && | |
| 1476 ((types == (1 << JVM_CONSTANT_InterfaceMethodref)) || | |
| 1477 (types == (1 << JVM_CONSTANT_Methodref)) || | |
| 1478 (types == (1 << JVM_CONSTANT_Fieldref)))) { | |
| 1479 int native_index = index; | |
| 1480 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1481 native_index = Bytes::swap_u2(index); | |
| 1482 } | |
| 1483 assert((native_index >= 0) && (native_index < cache->length()), | |
| 1484 "Must be a legal index into the cp cache"); | |
| 1485 index = cache->entry_at(native_index)->constant_pool_index(); | |
| 1486 } | |
| 1487 | |
| 1488 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
| 1489 unsigned int tag = cp->tag_at(index).value(); | |
| 1490 if ((types & (1 << tag)) == 0) { | |
| 1491 verify_error( | |
| 1492 "Illegal type at constant pool entry %d in class %s", | |
| 1493 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
| 1494 return; | |
| 1495 } | |
| 1496 } | |
| 1497 | |
| 1498 void ClassVerifier::verify_cp_class_type( | |
| 1499 int index, constantPoolHandle cp, TRAPS) { | |
| 1500 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
| 1501 constantTag tag = cp->tag_at(index); | |
| 1502 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
| 1503 verify_error("Illegal type at constant pool entry %d in class %s", | |
| 1504 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
| 1505 return; | |
| 1506 } | |
| 1507 } | |
| 1508 | |
| 1509 void ClassVerifier::format_error_message( | |
| 1510 const char* fmt, int offset, va_list va) { | |
| 1511 ResourceMark rm(_thread); | |
| 1512 stringStream message(_message, _message_buffer_len); | |
| 1513 message.vprint(fmt, va); | |
| 1514 if (!_method.is_null()) { | |
| 1515 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
| 1516 } | |
| 1517 if (offset != -1) { | |
| 1518 message.print(" at offset %d", offset); | |
| 1519 } | |
| 1520 } | |
| 1521 | |
| 1522 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
| 1523 _exception_type = vmSymbols::java_lang_VerifyError(); | |
| 1524 va_list va; | |
| 1525 va_start(va, fmt); | |
| 1526 format_error_message(fmt, offset, va); | |
| 1527 va_end(va); | |
| 1528 } | |
| 1529 | |
| 1530 void ClassVerifier::verify_error(const char* fmt, ...) { | |
| 1531 _exception_type = vmSymbols::java_lang_VerifyError(); | |
| 1532 va_list va; | |
| 1533 va_start(va, fmt); | |
| 1534 format_error_message(fmt, -1, va); | |
| 1535 va_end(va); | |
| 1536 } | |
| 1537 | |
| 1538 void ClassVerifier::class_format_error(const char* msg, ...) { | |
| 1539 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
| 1540 va_list va; | |
| 1541 va_start(va, msg); | |
| 1542 format_error_message(msg, -1, va); | |
| 1543 va_end(va); | |
| 1544 } | |
| 1545 | |
| 1546 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
| 1547 // Get current loader and protection domain first. | |
| 1548 oop loader = current_class()->class_loader(); | |
| 1549 oop protection_domain = current_class()->protection_domain(); | |
| 1550 | |
| 1551 return SystemDictionary::resolve_or_fail( | |
| 1552 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
| 1553 true, CHECK_NULL); | |
| 1554 } | |
| 1555 | |
| 1556 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
| 1557 klassOop target_class, | |
| 1558 symbolOop field_name, | |
| 1559 symbolOop field_sig, | |
| 1560 bool is_method) { | |
| 1561 No_Safepoint_Verifier nosafepoint; | |
| 1562 | |
| 1563 // If target class isn't a super class of this class, we don't worry about this case | |
| 1564 if (!this_class->is_subclass_of(target_class)) { | |
| 1565 return false; | |
| 1566 } | |
| 1567 // Check if the specified method or field is protected | |
| 1568 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
| 1569 fieldDescriptor fd; | |
| 1570 if (is_method) { | |
| 1571 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
| 1572 if (m != NULL && m->is_protected()) { | |
| 1573 if (!this_class->is_same_class_package(m->method_holder())) { | |
| 1574 return true; | |
| 1575 } | |
| 1576 } | |
| 1577 } else { | |
| 1578 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
| 1579 if(member_klass != NULL && fd.is_protected()) { | |
| 1580 if (!this_class->is_same_class_package(member_klass)) { | |
| 1581 return true; | |
| 1582 } | |
| 1583 } | |
| 1584 } | |
| 1585 return false; | |
| 1586 } | |
| 1587 | |
| 1588 void ClassVerifier::verify_ldc( | |
| 1589 int opcode, u2 index, StackMapFrame *current_frame, | |
| 1590 constantPoolHandle cp, u2 bci, TRAPS) { | |
| 1591 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
| 1592 constantTag tag = cp->tag_at(index); | |
| 1593 unsigned int types; | |
| 1594 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
| 1595 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
| 1596 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
| 1597 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class); | |
| 1598 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
| 1599 } | |
| 1600 } else { | |
| 1601 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
| 1602 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
| 1603 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
| 1604 } | |
|
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1605 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1606 current_frame->push_stack( |
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1607 VerificationType::reference_type( |
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1608 vmSymbols::java_lang_Object()), CHECK_VERIFY(this)); |
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1609 } else if (tag.is_string() || tag.is_unresolved_string()) { |
| 0 | 1610 current_frame->push_stack( |
| 1611 VerificationType::reference_type( | |
| 1612 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
| 1613 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
| 1614 current_frame->push_stack( | |
| 1615 VerificationType::reference_type( | |
| 1616 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
| 1617 } else if (tag.is_int()) { | |
| 1618 current_frame->push_stack( | |
| 1619 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1620 } else if (tag.is_float()) { | |
| 1621 current_frame->push_stack( | |
| 1622 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 1623 } else if (tag.is_double()) { | |
| 1624 current_frame->push_stack_2( | |
| 1625 VerificationType::double_type(), | |
| 1626 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 1627 } else if (tag.is_long()) { | |
| 1628 current_frame->push_stack_2( | |
| 1629 VerificationType::long_type(), | |
| 1630 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 1631 } else { | |
| 1632 verify_error(bci, "Invalid index in ldc"); | |
| 1633 return; | |
| 1634 } | |
| 1635 } | |
| 1636 | |
| 1637 void ClassVerifier::verify_switch( | |
| 1638 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
| 1639 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
| 1640 int bci = bcs->bci(); | |
| 1641 address bcp = bcs->bcp(); | |
| 1642 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
| 1643 | |
| 1644 // 4639449 & 4647081: padding bytes must be 0 | |
| 1645 u2 padding_offset = 1; | |
| 1646 while ((bcp + padding_offset) < aligned_bcp) { | |
| 1647 if(*(bcp + padding_offset) != 0) { | |
| 1648 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
| 1649 return; | |
| 1650 } | |
| 1651 padding_offset++; | |
| 1652 } | |
| 1653 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
| 1654 int keys, delta; | |
| 1655 current_frame->pop_stack( | |
| 1656 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 1657 if (bcs->code() == Bytecodes::_tableswitch) { | |
| 1658 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
| 1659 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
| 1660 if (low > high) { | |
| 1661 verify_error(bci, | |
| 1662 "low must be less than or equal to high in tableswitch"); | |
| 1663 return; | |
| 1664 } | |
| 1665 keys = high - low + 1; | |
| 1666 if (keys < 0) { | |
| 1667 verify_error(bci, "too many keys in tableswitch"); | |
| 1668 return; | |
| 1669 } | |
| 1670 delta = 1; | |
| 1671 } else { | |
| 1672 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
| 1673 if (keys < 0) { | |
| 1674 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
| 1675 return; | |
| 1676 } | |
| 1677 delta = 2; | |
| 1678 // Make sure that the lookupswitch items are sorted | |
| 1679 for (int i = 0; i < (keys - 1); i++) { | |
| 1680 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
| 1681 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
| 1682 if (this_key >= next_key) { | |
| 1683 verify_error(bci, "Bad lookupswitch instruction"); | |
| 1684 return; | |
| 1685 } | |
| 1686 } | |
| 1687 } | |
| 1688 int target = bci + default_offset; | |
| 1689 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
| 1690 for (int i = 0; i < keys; i++) { | |
| 1691 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
| 1692 stackmap_table->check_jump_target( | |
| 1693 current_frame, target, CHECK_VERIFY(this)); | |
| 1694 } | |
| 1695 } | |
| 1696 | |
| 1697 bool ClassVerifier::name_in_supers( | |
| 1698 symbolOop ref_name, instanceKlassHandle current) { | |
| 1699 klassOop super = current->super(); | |
| 1700 while (super != NULL) { | |
| 1701 if (super->klass_part()->name() == ref_name) { | |
| 1702 return true; | |
| 1703 } | |
| 1704 super = super->klass_part()->super(); | |
| 1705 } | |
| 1706 return false; | |
| 1707 } | |
| 1708 | |
| 1709 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
| 1710 StackMapFrame* current_frame, | |
| 1711 constantPoolHandle cp, | |
| 1712 TRAPS) { | |
| 1713 u2 index = bcs->get_index_big(); | |
| 1714 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
| 1715 | |
| 1716 // Get field name and signature | |
| 1717 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
| 1718 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
| 1719 | |
| 1720 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
| 1721 class_format_error( | |
| 1722 "Invalid signature for field in class %s referenced " | |
| 1723 "from constant pool index %d", _klass->external_name(), index); | |
| 1724 return; | |
| 1725 } | |
| 1726 | |
| 1727 // Get referenced class type | |
| 1728 VerificationType ref_class_type = cp_ref_index_to_type( | |
| 1729 index, cp, CHECK_VERIFY(this)); | |
| 1730 if (!ref_class_type.is_object()) { | |
| 1731 verify_error( | |
| 1732 "Expecting reference to class in class %s at constant pool index %d", | |
| 1733 _klass->external_name(), index); | |
| 1734 return; | |
| 1735 } | |
| 1736 VerificationType target_class_type = ref_class_type; | |
| 1737 | |
| 1738 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
| 1739 "buffer type must match VerificationType size"); | |
| 1740 uintptr_t field_type_buffer[2]; | |
| 1741 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
| 1742 // If we make a VerificationType[2] array directly, the compiler calls | |
| 1743 // to the c-runtime library to do the allocation instead of just | |
| 1744 // stack allocating it. Plus it would run constructors. This shows up | |
| 1745 // in performance profiles. | |
| 1746 | |
| 1747 SignatureStream sig_stream(field_sig, false); | |
| 1748 VerificationType stack_object_type; | |
| 1749 int n = change_sig_to_verificationType( | |
| 1750 &sig_stream, field_type, CHECK_VERIFY(this)); | |
| 1751 u2 bci = bcs->bci(); | |
| 1752 bool is_assignable; | |
| 1753 switch (bcs->code()) { | |
| 1754 case Bytecodes::_getstatic: { | |
| 1755 for (int i = 0; i < n; i++) { | |
| 1756 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
| 1757 } | |
| 1758 break; | |
| 1759 } | |
| 1760 case Bytecodes::_putstatic: { | |
| 1761 for (int i = n - 1; i >= 0; i--) { | |
| 1762 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
| 1763 } | |
| 1764 break; | |
| 1765 } | |
| 1766 case Bytecodes::_getfield: { | |
| 1767 stack_object_type = current_frame->pop_stack( | |
| 1768 target_class_type, CHECK_VERIFY(this)); | |
| 1769 for (int i = 0; i < n; i++) { | |
| 1770 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
| 1771 } | |
| 1772 goto check_protected; | |
| 1773 } | |
| 1774 case Bytecodes::_putfield: { | |
| 1775 for (int i = n - 1; i >= 0; i--) { | |
| 1776 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
| 1777 } | |
| 1778 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
| 1779 | |
| 1780 // The JVMS 2nd edition allows field initialization before the superclass | |
| 1781 // initializer, if the field is defined within the current class. | |
| 1782 fieldDescriptor fd; | |
| 1783 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
| 1784 target_class_type.equals(current_type()) && | |
| 1785 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
| 1786 stack_object_type = current_type(); | |
| 1787 } | |
| 1788 is_assignable = target_class_type.is_assignable_from( | |
| 1789 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
| 1790 if (!is_assignable) { | |
| 1791 verify_error(bci, "Bad type on operand stack in putfield"); | |
| 1792 return; | |
| 1793 } | |
| 1794 } | |
| 1795 check_protected: { | |
| 1796 if (_this_type == stack_object_type) | |
| 1797 break; // stack_object_type must be assignable to _current_class_type | |
| 1798 symbolHandle ref_class_name = symbolHandle(THREAD, | |
| 1799 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
| 1800 if (!name_in_supers(ref_class_name(), current_class())) | |
| 1801 // stack_object_type must be assignable to _current_class_type since: | |
| 1802 // 1. stack_object_type must be assignable to ref_class. | |
| 1803 // 2. ref_class must be _current_class or a subclass of it. It can't | |
| 1804 // be a superclass of it. See revised JVMS 5.4.4. | |
| 1805 break; | |
| 1806 | |
| 1807 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
| 1808 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
| 1809 field_sig(), false)) { | |
| 1810 // It's protected access, check if stack object is assignable to | |
| 1811 // current class. | |
| 1812 is_assignable = current_type().is_assignable_from( | |
| 1813 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
| 1814 if (!is_assignable) { | |
| 1815 verify_error(bci, "Bad access to protected data in getfield"); | |
| 1816 return; | |
| 1817 } | |
| 1818 } | |
| 1819 break; | |
| 1820 } | |
| 1821 default: ShouldNotReachHere(); | |
| 1822 } | |
| 1823 } | |
| 1824 | |
| 1825 void ClassVerifier::verify_invoke_init( | |
| 1826 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
| 1827 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
| 1828 constantPoolHandle cp, TRAPS) { | |
| 1829 u2 bci = bcs->bci(); | |
| 1830 VerificationType type = current_frame->pop_stack( | |
| 1831 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 1832 if (type == VerificationType::uninitialized_this_type()) { | |
| 1833 // The method must be an <init> method of either this class, or one of its | |
| 1834 // superclasses | |
| 1835 klassOop oop = current_class()(); | |
| 1836 Klass* klass = oop->klass_part(); | |
| 1837 while (klass != NULL && ref_class_type.name() != klass->name()) { | |
| 1838 klass = klass->super()->klass_part(); | |
| 1839 } | |
| 1840 if (klass == NULL) { | |
| 1841 verify_error(bci, "Bad <init> method call"); | |
| 1842 return; | |
| 1843 } | |
| 1844 current_frame->initialize_object(type, current_type()); | |
| 1845 *this_uninit = true; | |
| 1846 } else if (type.is_uninitialized()) { | |
| 1847 u2 new_offset = type.bci(); | |
| 1848 address new_bcp = bcs->bcp() - bci + new_offset; | |
| 1849 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
| 1850 verify_error(new_offset, "Expecting new instruction"); | |
| 1851 return; | |
| 1852 } | |
| 1853 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
| 1854 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
| 1855 | |
| 1856 // The method must be an <init> method of the indicated class | |
| 1857 VerificationType new_class_type = cp_index_to_type( | |
| 1858 new_class_index, cp, CHECK_VERIFY(this)); | |
| 1859 if (!new_class_type.equals(ref_class_type)) { | |
| 1860 verify_error(bci, "Call to wrong <init> method"); | |
| 1861 return; | |
| 1862 } | |
| 1863 // According to the VM spec, if the referent class is a superclass of the | |
| 1864 // current class, and is in a different runtime package, and the method is | |
| 1865 // protected, then the objectref must be the current class or a subclass | |
| 1866 // of the current class. | |
| 1867 VerificationType objectref_type = new_class_type; | |
| 1868 if (name_in_supers(ref_class_type.name(), current_class())) { | |
| 1869 klassOop ref_klass = load_class( | |
| 1870 ref_class_type.name(), CHECK_VERIFY(this)); | |
| 1871 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
| 1872 vmSymbols::object_initializer_name(), | |
| 1873 cp->signature_ref_at(bcs->get_index_big())); | |
| 1874 instanceKlassHandle mh(THREAD, m->method_holder()); | |
| 1875 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
| 1876 bool assignable = current_type().is_assignable_from( | |
| 1877 objectref_type, current_class(), CHECK_VERIFY(this)); | |
| 1878 if (!assignable) { | |
| 1879 verify_error(bci, "Bad access to protected <init> method"); | |
| 1880 return; | |
| 1881 } | |
| 1882 } | |
| 1883 } | |
| 1884 current_frame->initialize_object(type, new_class_type); | |
| 1885 } else { | |
| 1886 verify_error(bci, "Bad operand type when invoking <init>"); | |
| 1887 return; | |
| 1888 } | |
| 1889 } | |
| 1890 | |
| 1891 void ClassVerifier::verify_invoke_instructions( | |
| 1892 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
| 1893 bool *this_uninit, VerificationType return_type, | |
| 1894 constantPoolHandle cp, TRAPS) { | |
| 1895 // Make sure the constant pool item is the right type | |
| 1896 u2 index = bcs->get_index_big(); | |
| 1897 Bytecodes::Code opcode = bcs->code(); | |
| 1898 unsigned int types = (opcode == Bytecodes::_invokeinterface | |
| 1899 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1900 : opcode == Bytecodes::_invokedynamic |
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1901 ? 1 << JVM_CONSTANT_NameAndType |
| 0 | 1902 : 1 << JVM_CONSTANT_Methodref); |
| 1903 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
| 1904 | |
| 1905 // Get method name and signature | |
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1906 symbolHandle method_name; |
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1907 symbolHandle method_sig; |
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1908 if (opcode == Bytecodes::_invokedynamic) { |
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1909 int name_index = cp->name_ref_index_at(index); |
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1910 int sig_index = cp->signature_ref_index_at(index); |
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1911 method_name = symbolHandle(THREAD, cp->symbol_at(name_index)); |
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1912 method_sig = symbolHandle(THREAD, cp->symbol_at(sig_index)); |
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1913 } else { |
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1914 method_name = symbolHandle(THREAD, cp->name_ref_at(index)); |
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1915 method_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); |
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1916 } |
| 0 | 1917 |
| 1918 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
| 1919 class_format_error( | |
| 1920 "Invalid method signature in class %s referenced " | |
| 1921 "from constant pool index %d", _klass->external_name(), index); | |
| 1922 return; | |
| 1923 } | |
| 1924 | |
| 1925 // Get referenced class type | |
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1926 VerificationType ref_class_type; |
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1927 if (opcode == Bytecodes::_invokedynamic) { |
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1928 if (!EnableInvokeDynamic) { |
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1929 class_format_error( |
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1930 "invokedynamic instructions not enabled on this JVM", |
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1931 _klass->external_name()); |
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1932 return; |
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1933 } |
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1934 } else { |
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1935 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1936 } |
| 0 | 1937 |
| 1938 // For a small signature length, we just allocate 128 bytes instead | |
| 1939 // of parsing the signature once to find its size. | |
| 1940 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
| 1941 // longs/doubles to be consertive. | |
| 1942 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
| 1943 "buffer type must match VerificationType size"); | |
| 1944 uintptr_t on_stack_sig_types_buffer[128]; | |
| 1945 // If we make a VerificationType[128] array directly, the compiler calls | |
| 1946 // to the c-runtime library to do the allocation instead of just | |
| 1947 // stack allocating it. Plus it would run constructors. This shows up | |
| 1948 // in performance profiles. | |
| 1949 | |
| 1950 VerificationType* sig_types; | |
| 1951 int size = (method_sig->utf8_length() - 3) * 2; | |
| 1952 if (size > 128) { | |
| 1953 // Long and double occupies two slots here. | |
| 1954 ArgumentSizeComputer size_it(method_sig); | |
| 1955 size = size_it.size(); | |
| 1956 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
| 1957 } else{ | |
| 1958 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
| 1959 } | |
| 1960 SignatureStream sig_stream(method_sig); | |
| 1961 int sig_i = 0; | |
| 1962 while (!sig_stream.at_return_type()) { | |
| 1963 sig_i += change_sig_to_verificationType( | |
| 1964 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
| 1965 sig_stream.next(); | |
| 1966 } | |
| 1967 int nargs = sig_i; | |
| 1968 | |
| 1969 #ifdef ASSERT | |
| 1970 { | |
| 1971 ArgumentSizeComputer size_it(method_sig); | |
| 1972 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
| 1973 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
| 1974 } | |
| 1975 #endif | |
| 1976 | |
| 1977 // Check instruction operands | |
| 1978 u2 bci = bcs->bci(); | |
| 1979 if (opcode == Bytecodes::_invokeinterface) { | |
| 1980 address bcp = bcs->bcp(); | |
| 1981 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
| 1982 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
| 1983 // the difference between the size of the operand stack before and after the instruction | |
| 1984 // executes. | |
| 1985 if (*(bcp+3) != (nargs+1)) { | |
| 1986 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
| 1987 return; | |
| 1988 } | |
| 1989 if (*(bcp+4) != 0) { | |
| 1990 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
| 1991 return; | |
| 1992 } | |
| 1993 } | |
| 1994 | |
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1995 if (opcode == Bytecodes::_invokedynamic) { |
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1996 address bcp = bcs->bcp(); |
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1997 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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1998 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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1999 return; |
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2000 } |
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2001 } |
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2002 |
| 0 | 2003 if (method_name->byte_at(0) == '<') { |
| 2004 // Make sure <init> can only be invoked by invokespecial | |
| 2005 if (opcode != Bytecodes::_invokespecial || | |
| 2006 method_name() != vmSymbols::object_initializer_name()) { | |
| 2007 verify_error(bci, "Illegal call to internal method"); | |
| 2008 return; | |
| 2009 } | |
| 2010 } else if (opcode == Bytecodes::_invokespecial | |
| 2011 && !ref_class_type.equals(current_type()) | |
| 2012 && !ref_class_type.equals(VerificationType::reference_type( | |
| 2013 current_class()->super()->klass_part()->name()))) { | |
| 2014 bool subtype = ref_class_type.is_assignable_from( | |
| 2015 current_type(), current_class(), CHECK_VERIFY(this)); | |
| 2016 if (!subtype) { | |
| 2017 verify_error(bci, "Bad invokespecial instruction: " | |
| 2018 "current class isn't assignable to reference class."); | |
| 2019 return; | |
| 2020 } | |
| 2021 } | |
| 2022 // Match method descriptor with operand stack | |
| 2023 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
| 2024 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
| 2025 } | |
| 2026 // Check objectref on operand stack | |
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2027 if (opcode != Bytecodes::_invokestatic && |
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2028 opcode != Bytecodes::_invokedynamic) { |
| 0 | 2029 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
| 2030 verify_invoke_init(bcs, ref_class_type, current_frame, | |
| 2031 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
| 2032 } else { // other methods | |
| 2033 // Ensures that target class is assignable to method class. | |
| 2034 if (opcode == Bytecodes::_invokespecial) { | |
| 2035 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
| 2036 } else if (opcode == Bytecodes::_invokevirtual) { | |
| 2037 VerificationType stack_object_type = | |
| 2038 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
| 2039 if (current_type() != stack_object_type) { | |
| 2040 assert(cp->cache() == NULL, "not rewritten yet"); | |
| 2041 symbolHandle ref_class_name = symbolHandle(THREAD, | |
| 2042 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
| 2043 // See the comments in verify_field_instructions() for | |
| 2044 // the rationale behind this. | |
| 2045 if (name_in_supers(ref_class_name(), current_class())) { | |
| 2046 klassOop ref_class = load_class(ref_class_name, CHECK); | |
| 2047 if (is_protected_access( | |
| 2048 _klass, ref_class, method_name(), method_sig(), true)) { | |
| 2049 // It's protected access, check if stack object is | |
| 2050 // assignable to current class. | |
| 2051 bool is_assignable = current_type().is_assignable_from( | |
| 2052 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
| 2053 if (!is_assignable) { | |
| 2054 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
| 2055 && stack_object_type.is_array() | |
| 2056 && method_name() == vmSymbols::clone_name()) { | |
| 2057 // Special case: arrays pretend to implement public Object | |
| 2058 // clone(). | |
| 2059 } else { | |
| 2060 verify_error(bci, | |
| 2061 "Bad access to protected data in invokevirtual"); | |
| 2062 return; | |
| 2063 } | |
| 2064 } | |
| 2065 } | |
| 2066 } | |
| 2067 } | |
| 2068 } else { | |
| 2069 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
| 2070 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
| 2071 } | |
| 2072 } | |
| 2073 } | |
| 2074 // Push the result type. | |
| 2075 if (sig_stream.type() != T_VOID) { | |
| 2076 if (method_name() == vmSymbols::object_initializer_name()) { | |
| 2077 // <init> method must have a void return type | |
| 2078 verify_error(bci, "Return type must be void in <init> method"); | |
| 2079 return; | |
| 2080 } | |
| 2081 VerificationType return_type[2]; | |
| 2082 int n = change_sig_to_verificationType( | |
| 2083 &sig_stream, return_type, CHECK_VERIFY(this)); | |
| 2084 for (int i = 0; i < n; i++) { | |
| 2085 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
| 2086 } | |
| 2087 } | |
| 2088 } | |
| 2089 | |
| 2090 VerificationType ClassVerifier::get_newarray_type( | |
| 2091 u2 index, u2 bci, TRAPS) { | |
| 2092 const char* from_bt[] = { | |
| 2093 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
| 2094 }; | |
| 2095 if (index < T_BOOLEAN || index > T_LONG) { | |
| 2096 verify_error(bci, "Illegal newarray instruction"); | |
| 2097 return VerificationType::bogus_type(); | |
| 2098 } | |
| 2099 | |
| 2100 // from_bt[index] contains the array signature which has a length of 2 | |
| 2101 symbolHandle sig = oopFactory::new_symbol_handle( | |
| 2102 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
| 2103 return VerificationType::reference_type(sig); | |
| 2104 } | |
| 2105 | |
| 2106 void ClassVerifier::verify_anewarray( | |
| 2107 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
| 2108 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
| 2109 current_frame->pop_stack( | |
| 2110 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 2111 | |
| 2112 VerificationType component_type = | |
| 2113 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
| 2114 ResourceMark rm(THREAD); | |
| 2115 int length; | |
| 2116 char* arr_sig_str; | |
| 2117 if (component_type.is_array()) { // it's an array | |
| 2118 const char* component_name = component_type.name()->as_utf8(); | |
| 2119 // add one dimension to component | |
| 2120 length = (int)strlen(component_name) + 1; | |
| 2121 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
| 2122 arr_sig_str[0] = '['; | |
| 2123 strncpy(&arr_sig_str[1], component_name, length - 1); | |
| 2124 } else { // it's an object or interface | |
| 2125 const char* component_name = component_type.name()->as_utf8(); | |
| 2126 // add one dimension to component with 'L' prepended and ';' postpended. | |
| 2127 length = (int)strlen(component_name) + 3; | |
| 2128 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
| 2129 arr_sig_str[0] = '['; | |
| 2130 arr_sig_str[1] = 'L'; | |
| 2131 strncpy(&arr_sig_str[2], component_name, length - 2); | |
| 2132 arr_sig_str[length - 1] = ';'; | |
| 2133 } | |
| 2134 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
| 2135 arr_sig_str, length, CHECK_VERIFY(this)); | |
| 2136 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
| 2137 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
| 2138 } | |
| 2139 | |
| 2140 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2141 current_frame->get_local( | |
| 2142 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 2143 current_frame->push_stack( | |
| 2144 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 2145 } | |
| 2146 | |
| 2147 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2148 current_frame->get_local_2( | |
| 2149 index, VerificationType::long_type(), | |
| 2150 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 2151 current_frame->push_stack_2( | |
| 2152 VerificationType::long_type(), | |
| 2153 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 2154 } | |
| 2155 | |
| 2156 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2157 current_frame->get_local( | |
| 2158 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 2159 current_frame->push_stack( | |
| 2160 VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 2161 } | |
| 2162 | |
| 2163 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2164 current_frame->get_local_2( | |
| 2165 index, VerificationType::double_type(), | |
| 2166 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 2167 current_frame->push_stack_2( | |
| 2168 VerificationType::double_type(), | |
| 2169 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 2170 } | |
| 2171 | |
| 2172 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2173 VerificationType type = current_frame->get_local( | |
| 2174 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 2175 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
| 2176 } | |
| 2177 | |
| 2178 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2179 current_frame->pop_stack( | |
| 2180 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 2181 current_frame->set_local( | |
| 2182 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 2183 } | |
| 2184 | |
| 2185 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2186 current_frame->pop_stack_2( | |
| 2187 VerificationType::long2_type(), | |
| 2188 VerificationType::long_type(), CHECK_VERIFY(this)); | |
| 2189 current_frame->set_local_2( | |
| 2190 index, VerificationType::long_type(), | |
| 2191 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
| 2192 } | |
| 2193 | |
| 2194 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2195 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 2196 current_frame->set_local( | |
| 2197 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
| 2198 } | |
| 2199 | |
| 2200 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2201 current_frame->pop_stack_2( | |
| 2202 VerificationType::double2_type(), | |
| 2203 VerificationType::double_type(), CHECK_VERIFY(this)); | |
| 2204 current_frame->set_local_2( | |
| 2205 index, VerificationType::double_type(), | |
| 2206 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
| 2207 } | |
| 2208 | |
| 2209 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2210 VerificationType type = current_frame->pop_stack( | |
| 2211 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
| 2212 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
| 2213 } | |
| 2214 | |
| 2215 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
| 2216 VerificationType type = current_frame->get_local( | |
| 2217 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
| 2218 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
| 2219 } | |
| 2220 | |
| 2221 void ClassVerifier::verify_return_value( | |
| 2222 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
| 2223 if (return_type == VerificationType::bogus_type()) { | |
| 2224 verify_error(bci, "Method expects a return value"); | |
| 2225 return; | |
| 2226 } | |
| 2227 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
| 2228 if (!match) { | |
| 2229 verify_error(bci, "Bad return type"); | |
| 2230 return; | |
| 2231 } | |
| 2232 } |