verifier.cpp revision 1879:f95d63e2154a
1/* 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/classFileStream.hpp" 27#include "classfile/javaClasses.hpp" 28#include "classfile/stackMapTable.hpp" 29#include "classfile/systemDictionary.hpp" 30#include "classfile/verifier.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "interpreter/bytecodeStream.hpp" 33#include "memory/oopFactory.hpp" 34#include "memory/resourceArea.hpp" 35#include "oops/instanceKlass.hpp" 36#include "oops/oop.inline.hpp" 37#include "oops/typeArrayOop.hpp" 38#include "prims/jvm.h" 39#include "runtime/fieldDescriptor.hpp" 40#include "runtime/handles.inline.hpp" 41#include "runtime/hpi.hpp" 42#include "runtime/interfaceSupport.hpp" 43#include "runtime/javaCalls.hpp" 44#include "runtime/orderAccess.hpp" 45#include "runtime/os.hpp" 46#ifdef TARGET_ARCH_x86 47# include "bytes_x86.hpp" 48#endif 49#ifdef TARGET_ARCH_sparc 50# include "bytes_sparc.hpp" 51#endif 52#ifdef TARGET_ARCH_zero 53# include "bytes_zero.hpp" 54#endif 55 56#define NOFAILOVER_MAJOR_VERSION 51 57 58// Access to external entry for VerifyClassCodes - old byte code verifier 59 60extern "C" { 61 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); 62 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); 63} 64 65static void* volatile _verify_byte_codes_fn = NULL; 66 67static volatile jint _is_new_verify_byte_codes_fn = (jint) true; 68 69static void* verify_byte_codes_fn() { 70 if (_verify_byte_codes_fn == NULL) { 71 void *lib_handle = os::native_java_library(); 72 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); 73 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); 74 if (func == NULL) { 75 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); 76 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); 77 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); 78 } 79 } 80 return (void*)_verify_byte_codes_fn; 81} 82 83 84// Methods in Verifier 85 86bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { 87 return (class_loader == NULL || !should_verify_class) ? 88 BytecodeVerificationLocal : BytecodeVerificationRemote; 89} 90 91bool Verifier::relax_verify_for(oop loader) { 92 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 93 bool need_verify = 94 // verifyAll 95 (BytecodeVerificationLocal && BytecodeVerificationRemote) || 96 // verifyRemote 97 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); 98 return !need_verify; 99} 100 101bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { 102 ResourceMark rm(THREAD); 103 HandleMark hm; 104 105 symbolHandle exception_name; 106 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; 107 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); 108 109 const char* klassName = klass->external_name(); 110 111 // If the class should be verified, first see if we can use the split 112 // verifier. If not, or if verification fails and FailOverToOldVerifier 113 // is set, then call the inference verifier. 114 if (is_eligible_for_verification(klass, should_verify_class)) { 115 if (TraceClassInitialization) { 116 tty->print_cr("Start class verification for: %s", klassName); 117 } 118 if (UseSplitVerifier && 119 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { 120 ClassVerifier split_verifier( 121 klass, message_buffer, message_buffer_len, THREAD); 122 split_verifier.verify_class(THREAD); 123 exception_name = split_verifier.result(); 124 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && 125 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && 126 (exception_name == vmSymbols::java_lang_VerifyError() || 127 exception_name == vmSymbols::java_lang_ClassFormatError())) { 128 if (TraceClassInitialization) { 129 tty->print_cr( 130 "Fail over class verification to old verifier for: %s", klassName); 131 } 132 exception_name = inference_verify( 133 klass, message_buffer, message_buffer_len, THREAD); 134 } 135 } else { 136 exception_name = inference_verify( 137 klass, message_buffer, message_buffer_len, THREAD); 138 } 139 140 if (TraceClassInitialization) { 141 if (HAS_PENDING_EXCEPTION) { 142 tty->print("Verification for %s has", klassName); 143 tty->print_cr(" exception pending %s ", 144 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); 145 } else if (!exception_name.is_null()) { 146 tty->print_cr("Verification for %s failed", klassName); 147 } 148 tty->print_cr("End class verification for: %s", klassName); 149 } 150 } 151 152 if (HAS_PENDING_EXCEPTION) { 153 return false; // use the existing exception 154 } else if (exception_name.is_null()) { 155 return true; // verifcation succeeded 156 } else { // VerifyError or ClassFormatError to be created and thrown 157 ResourceMark rm(THREAD); 158 instanceKlassHandle kls = 159 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); 160 while (!kls.is_null()) { 161 if (kls == klass) { 162 // If the class being verified is the exception we're creating 163 // or one of it's superclasses, we're in trouble and are going 164 // to infinitely recurse when we try to initialize the exception. 165 // So bail out here by throwing the preallocated VM error. 166 THROW_OOP_(Universe::virtual_machine_error_instance(), false); 167 } 168 kls = kls->super(); 169 } 170 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure 171 THROW_MSG_(exception_name, message_buffer, false); 172 } 173} 174 175bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { 176 symbolOop name = klass->name(); 177 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); 178 179 return (should_verify_for(klass->class_loader(), should_verify_class) && 180 // return if the class is a bootstrapping class 181 // or defineClass specified not to verify by default (flags override passed arg) 182 // We need to skip the following four for bootstraping 183 name != vmSymbols::java_lang_Object() && 184 name != vmSymbols::java_lang_Class() && 185 name != vmSymbols::java_lang_String() && 186 name != vmSymbols::java_lang_Throwable() && 187 188 // Can not verify the bytecodes for shared classes because they have 189 // already been rewritten to contain constant pool cache indices, 190 // which the verifier can't understand. 191 // Shared classes shouldn't have stackmaps either. 192 !klass()->is_shared() && 193 194 // As of the fix for 4486457 we disable verification for all of the 195 // dynamically-generated bytecodes associated with the 1.4 196 // reflection implementation, not just those associated with 197 // sun/reflect/SerializationConstructorAccessor. 198 // NOTE: this is called too early in the bootstrapping process to be 199 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. 200 (refl_magic_klass == NULL || 201 !klass->is_subtype_of(refl_magic_klass) || 202 VerifyReflectionBytecodes) 203 ); 204} 205 206symbolHandle Verifier::inference_verify( 207 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { 208 JavaThread* thread = (JavaThread*)THREAD; 209 JNIEnv *env = thread->jni_environment(); 210 211 void* verify_func = verify_byte_codes_fn(); 212 213 if (verify_func == NULL) { 214 jio_snprintf(message, message_len, "Could not link verifier"); 215 return vmSymbols::java_lang_VerifyError(); 216 } 217 218 ResourceMark rm(THREAD); 219 if (ClassVerifier::_verify_verbose) { 220 tty->print_cr("Verifying class %s with old format", klass->external_name()); 221 } 222 223 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); 224 jint result; 225 226 { 227 HandleMark hm(thread); 228 ThreadToNativeFromVM ttn(thread); 229 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint 230 // code knows that we have left the VM 231 232 if (_is_new_verify_byte_codes_fn) { 233 verify_byte_codes_fn_new_t func = 234 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); 235 result = (*func)(env, cls, message, (int)message_len, 236 klass->major_version()); 237 } else { 238 verify_byte_codes_fn_t func = 239 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); 240 result = (*func)(env, cls, message, (int)message_len); 241 } 242 } 243 244 JNIHandles::destroy_local(cls); 245 246 // These numbers are chosen so that VerifyClassCodes interface doesn't need 247 // to be changed (still return jboolean (unsigned char)), and result is 248 // 1 when verification is passed. 249 symbolHandle nh(NULL); 250 if (result == 0) { 251 return vmSymbols::java_lang_VerifyError(); 252 } else if (result == 1) { 253 return nh; // verified. 254 } else if (result == 2) { 255 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); 256 } else if (result == 3) { 257 return vmSymbols::java_lang_ClassFormatError(); 258 } else { 259 ShouldNotReachHere(); 260 return nh; 261 } 262} 263 264// Methods in ClassVerifier 265 266bool ClassVerifier::_verify_verbose = false; 267 268ClassVerifier::ClassVerifier( 269 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) 270 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), 271 _message_buffer_len(msg_len), _klass(klass) { 272 _this_type = VerificationType::reference_type(klass->name()); 273} 274 275ClassVerifier::~ClassVerifier() { 276} 277 278VerificationType ClassVerifier::object_type() const { 279 return VerificationType::reference_type(vmSymbols::java_lang_Object()); 280} 281 282void ClassVerifier::verify_class(TRAPS) { 283 if (_verify_verbose) { 284 tty->print_cr("Verifying class %s with new format", 285 _klass->external_name()); 286 } 287 288 objArrayHandle methods(THREAD, _klass->methods()); 289 int num_methods = methods->length(); 290 291 for (int index = 0; index < num_methods; index++) { 292 // Check for recursive re-verification before each method. 293 if (was_recursively_verified()) return; 294 295 methodOop m = (methodOop)methods->obj_at(index); 296 if (m->is_native() || m->is_abstract()) { 297 // If m is native or abstract, skip it. It is checked in class file 298 // parser that methods do not override a final method. 299 continue; 300 } 301 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); 302 } 303 304 if (_verify_verbose || TraceClassInitialization) { 305 if (was_recursively_verified()) 306 tty->print_cr("Recursive verification detected for: %s", 307 _klass->external_name()); 308 } 309} 310 311void ClassVerifier::verify_method(methodHandle m, TRAPS) { 312 ResourceMark rm(THREAD); 313 _method = m; // initialize _method 314 if (_verify_verbose) { 315 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); 316 } 317 318 const char* bad_type_msg = "Bad type on operand stack in %s"; 319 320 int32_t max_stack = m->max_stack(); 321 int32_t max_locals = m->max_locals(); 322 constantPoolHandle cp(THREAD, m->constants()); 323 324 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { 325 class_format_error("Invalid method signature"); 326 return; 327 } 328 329 // Initial stack map frame: offset is 0, stack is initially empty. 330 StackMapFrame current_frame(max_locals, max_stack, this); 331 // Set initial locals 332 VerificationType return_type = current_frame.set_locals_from_arg( 333 m, current_type(), CHECK_VERIFY(this)); 334 335 int32_t stackmap_index = 0; // index to the stackmap array 336 337 u4 code_length = m->code_size(); 338 339 // Scan the bytecode and map each instruction's start offset to a number. 340 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); 341 342 int ex_min = code_length; 343 int ex_max = -1; 344 // Look through each item on the exception table. Each of the fields must refer 345 // to a legal instruction. 346 verify_exception_handler_table( 347 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); 348 349 // Look through each entry on the local variable table and make sure 350 // its range of code array offsets is valid. (4169817) 351 if (m->has_localvariable_table()) { 352 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); 353 } 354 355 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); 356 StackMapStream stream(stackmap_data); 357 StackMapReader reader(this, &stream, code_data, code_length, THREAD); 358 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, 359 code_data, code_length, CHECK_VERIFY(this)); 360 361 if (_verify_verbose) { 362 stackmap_table.print(); 363 } 364 365 RawBytecodeStream bcs(m); 366 367 // Scan the byte code linearly from the start to the end 368 bool no_control_flow = false; // Set to true when there is no direct control 369 // flow from current instruction to the next 370 // instruction in sequence 371 Bytecodes::Code opcode; 372 while (!bcs.is_last_bytecode()) { 373 // Check for recursive re-verification before each bytecode. 374 if (was_recursively_verified()) return; 375 376 opcode = bcs.raw_next(); 377 u2 bci = bcs.bci(); 378 379 // Set current frame's offset to bci 380 current_frame.set_offset(bci); 381 382 // Make sure every offset in stackmap table point to the beginning to 383 // an instruction. Match current_frame to stackmap_table entry with 384 // the same offset if exists. 385 stackmap_index = verify_stackmap_table( 386 stackmap_index, bci, ¤t_frame, &stackmap_table, 387 no_control_flow, CHECK_VERIFY(this)); 388 389 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' 390 391 // Merge with the next instruction 392 { 393 u2 index; 394 int target; 395 VerificationType type, type2; 396 VerificationType atype; 397 398#ifndef PRODUCT 399 if (_verify_verbose) { 400 current_frame.print(); 401 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); 402 } 403#endif 404 405 // Make sure wide instruction is in correct format 406 if (bcs.is_wide()) { 407 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && 408 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && 409 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && 410 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && 411 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && 412 opcode != Bytecodes::_dstore) { 413 verify_error(bci, "Bad wide instruction"); 414 return; 415 } 416 } 417 418 switch (opcode) { 419 case Bytecodes::_nop : 420 no_control_flow = false; break; 421 case Bytecodes::_aconst_null : 422 current_frame.push_stack( 423 VerificationType::null_type(), CHECK_VERIFY(this)); 424 no_control_flow = false; break; 425 case Bytecodes::_iconst_m1 : 426 case Bytecodes::_iconst_0 : 427 case Bytecodes::_iconst_1 : 428 case Bytecodes::_iconst_2 : 429 case Bytecodes::_iconst_3 : 430 case Bytecodes::_iconst_4 : 431 case Bytecodes::_iconst_5 : 432 current_frame.push_stack( 433 VerificationType::integer_type(), CHECK_VERIFY(this)); 434 no_control_flow = false; break; 435 case Bytecodes::_lconst_0 : 436 case Bytecodes::_lconst_1 : 437 current_frame.push_stack_2( 438 VerificationType::long_type(), 439 VerificationType::long2_type(), CHECK_VERIFY(this)); 440 no_control_flow = false; break; 441 case Bytecodes::_fconst_0 : 442 case Bytecodes::_fconst_1 : 443 case Bytecodes::_fconst_2 : 444 current_frame.push_stack( 445 VerificationType::float_type(), CHECK_VERIFY(this)); 446 no_control_flow = false; break; 447 case Bytecodes::_dconst_0 : 448 case Bytecodes::_dconst_1 : 449 current_frame.push_stack_2( 450 VerificationType::double_type(), 451 VerificationType::double2_type(), CHECK_VERIFY(this)); 452 no_control_flow = false; break; 453 case Bytecodes::_sipush : 454 case Bytecodes::_bipush : 455 current_frame.push_stack( 456 VerificationType::integer_type(), CHECK_VERIFY(this)); 457 no_control_flow = false; break; 458 case Bytecodes::_ldc : 459 verify_ldc( 460 opcode, bcs.get_index_u1(), ¤t_frame, 461 cp, bci, CHECK_VERIFY(this)); 462 no_control_flow = false; break; 463 case Bytecodes::_ldc_w : 464 case Bytecodes::_ldc2_w : 465 verify_ldc( 466 opcode, bcs.get_index_u2(), ¤t_frame, 467 cp, bci, CHECK_VERIFY(this)); 468 no_control_flow = false; break; 469 case Bytecodes::_iload : 470 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 471 no_control_flow = false; break; 472 case Bytecodes::_iload_0 : 473 case Bytecodes::_iload_1 : 474 case Bytecodes::_iload_2 : 475 case Bytecodes::_iload_3 : 476 index = opcode - Bytecodes::_iload_0; 477 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); 478 no_control_flow = false; break; 479 case Bytecodes::_lload : 480 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 481 no_control_flow = false; break; 482 case Bytecodes::_lload_0 : 483 case Bytecodes::_lload_1 : 484 case Bytecodes::_lload_2 : 485 case Bytecodes::_lload_3 : 486 index = opcode - Bytecodes::_lload_0; 487 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); 488 no_control_flow = false; break; 489 case Bytecodes::_fload : 490 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 491 no_control_flow = false; break; 492 case Bytecodes::_fload_0 : 493 case Bytecodes::_fload_1 : 494 case Bytecodes::_fload_2 : 495 case Bytecodes::_fload_3 : 496 index = opcode - Bytecodes::_fload_0; 497 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); 498 no_control_flow = false; break; 499 case Bytecodes::_dload : 500 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 501 no_control_flow = false; break; 502 case Bytecodes::_dload_0 : 503 case Bytecodes::_dload_1 : 504 case Bytecodes::_dload_2 : 505 case Bytecodes::_dload_3 : 506 index = opcode - Bytecodes::_dload_0; 507 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); 508 no_control_flow = false; break; 509 case Bytecodes::_aload : 510 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 511 no_control_flow = false; break; 512 case Bytecodes::_aload_0 : 513 case Bytecodes::_aload_1 : 514 case Bytecodes::_aload_2 : 515 case Bytecodes::_aload_3 : 516 index = opcode - Bytecodes::_aload_0; 517 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); 518 no_control_flow = false; break; 519 case Bytecodes::_iaload : 520 type = current_frame.pop_stack( 521 VerificationType::integer_type(), CHECK_VERIFY(this)); 522 atype = current_frame.pop_stack( 523 VerificationType::reference_check(), CHECK_VERIFY(this)); 524 if (!atype.is_int_array()) { 525 verify_error(bci, bad_type_msg, "iaload"); 526 return; 527 } 528 current_frame.push_stack( 529 VerificationType::integer_type(), CHECK_VERIFY(this)); 530 no_control_flow = false; break; 531 case Bytecodes::_baload : 532 type = current_frame.pop_stack( 533 VerificationType::integer_type(), CHECK_VERIFY(this)); 534 atype = current_frame.pop_stack( 535 VerificationType::reference_check(), CHECK_VERIFY(this)); 536 if (!atype.is_bool_array() && !atype.is_byte_array()) { 537 verify_error(bci, bad_type_msg, "baload"); 538 return; 539 } 540 current_frame.push_stack( 541 VerificationType::integer_type(), CHECK_VERIFY(this)); 542 no_control_flow = false; break; 543 case Bytecodes::_caload : 544 type = current_frame.pop_stack( 545 VerificationType::integer_type(), CHECK_VERIFY(this)); 546 atype = current_frame.pop_stack( 547 VerificationType::reference_check(), CHECK_VERIFY(this)); 548 if (!atype.is_char_array()) { 549 verify_error(bci, bad_type_msg, "caload"); 550 return; 551 } 552 current_frame.push_stack( 553 VerificationType::integer_type(), CHECK_VERIFY(this)); 554 no_control_flow = false; break; 555 case Bytecodes::_saload : 556 type = current_frame.pop_stack( 557 VerificationType::integer_type(), CHECK_VERIFY(this)); 558 atype = current_frame.pop_stack( 559 VerificationType::reference_check(), CHECK_VERIFY(this)); 560 if (!atype.is_short_array()) { 561 verify_error(bci, bad_type_msg, "saload"); 562 return; 563 } 564 current_frame.push_stack( 565 VerificationType::integer_type(), CHECK_VERIFY(this)); 566 no_control_flow = false; break; 567 case Bytecodes::_laload : 568 type = current_frame.pop_stack( 569 VerificationType::integer_type(), CHECK_VERIFY(this)); 570 atype = current_frame.pop_stack( 571 VerificationType::reference_check(), CHECK_VERIFY(this)); 572 if (!atype.is_long_array()) { 573 verify_error(bci, bad_type_msg, "laload"); 574 return; 575 } 576 current_frame.push_stack_2( 577 VerificationType::long_type(), 578 VerificationType::long2_type(), CHECK_VERIFY(this)); 579 no_control_flow = false; break; 580 case Bytecodes::_faload : 581 type = current_frame.pop_stack( 582 VerificationType::integer_type(), CHECK_VERIFY(this)); 583 atype = current_frame.pop_stack( 584 VerificationType::reference_check(), CHECK_VERIFY(this)); 585 if (!atype.is_float_array()) { 586 verify_error(bci, bad_type_msg, "faload"); 587 return; 588 } 589 current_frame.push_stack( 590 VerificationType::float_type(), CHECK_VERIFY(this)); 591 no_control_flow = false; break; 592 case Bytecodes::_daload : 593 type = current_frame.pop_stack( 594 VerificationType::integer_type(), CHECK_VERIFY(this)); 595 atype = current_frame.pop_stack( 596 VerificationType::reference_check(), CHECK_VERIFY(this)); 597 if (!atype.is_double_array()) { 598 verify_error(bci, bad_type_msg, "daload"); 599 return; 600 } 601 current_frame.push_stack_2( 602 VerificationType::double_type(), 603 VerificationType::double2_type(), CHECK_VERIFY(this)); 604 no_control_flow = false; break; 605 case Bytecodes::_aaload : { 606 type = current_frame.pop_stack( 607 VerificationType::integer_type(), CHECK_VERIFY(this)); 608 atype = current_frame.pop_stack( 609 VerificationType::reference_check(), CHECK_VERIFY(this)); 610 if (!atype.is_reference_array()) { 611 verify_error(bci, bad_type_msg, "aaload"); 612 return; 613 } 614 if (atype.is_null()) { 615 current_frame.push_stack( 616 VerificationType::null_type(), CHECK_VERIFY(this)); 617 } else { 618 VerificationType component = 619 atype.get_component(CHECK_VERIFY(this)); 620 current_frame.push_stack(component, CHECK_VERIFY(this)); 621 } 622 no_control_flow = false; break; 623 } 624 case Bytecodes::_istore : 625 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 626 no_control_flow = false; break; 627 case Bytecodes::_istore_0 : 628 case Bytecodes::_istore_1 : 629 case Bytecodes::_istore_2 : 630 case Bytecodes::_istore_3 : 631 index = opcode - Bytecodes::_istore_0; 632 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); 633 no_control_flow = false; break; 634 case Bytecodes::_lstore : 635 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 636 no_control_flow = false; break; 637 case Bytecodes::_lstore_0 : 638 case Bytecodes::_lstore_1 : 639 case Bytecodes::_lstore_2 : 640 case Bytecodes::_lstore_3 : 641 index = opcode - Bytecodes::_lstore_0; 642 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); 643 no_control_flow = false; break; 644 case Bytecodes::_fstore : 645 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 646 no_control_flow = false; break; 647 case Bytecodes::_fstore_0 : 648 case Bytecodes::_fstore_1 : 649 case Bytecodes::_fstore_2 : 650 case Bytecodes::_fstore_3 : 651 index = opcode - Bytecodes::_fstore_0; 652 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); 653 no_control_flow = false; break; 654 case Bytecodes::_dstore : 655 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 656 no_control_flow = false; break; 657 case Bytecodes::_dstore_0 : 658 case Bytecodes::_dstore_1 : 659 case Bytecodes::_dstore_2 : 660 case Bytecodes::_dstore_3 : 661 index = opcode - Bytecodes::_dstore_0; 662 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); 663 no_control_flow = false; break; 664 case Bytecodes::_astore : 665 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 666 no_control_flow = false; break; 667 case Bytecodes::_astore_0 : 668 case Bytecodes::_astore_1 : 669 case Bytecodes::_astore_2 : 670 case Bytecodes::_astore_3 : 671 index = opcode - Bytecodes::_astore_0; 672 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); 673 no_control_flow = false; break; 674 case Bytecodes::_iastore : 675 type = current_frame.pop_stack( 676 VerificationType::integer_type(), CHECK_VERIFY(this)); 677 type2 = current_frame.pop_stack( 678 VerificationType::integer_type(), CHECK_VERIFY(this)); 679 atype = current_frame.pop_stack( 680 VerificationType::reference_check(), CHECK_VERIFY(this)); 681 if (!atype.is_int_array()) { 682 verify_error(bci, bad_type_msg, "iastore"); 683 return; 684 } 685 no_control_flow = false; break; 686 case Bytecodes::_bastore : 687 type = current_frame.pop_stack( 688 VerificationType::integer_type(), CHECK_VERIFY(this)); 689 type2 = current_frame.pop_stack( 690 VerificationType::integer_type(), CHECK_VERIFY(this)); 691 atype = current_frame.pop_stack( 692 VerificationType::reference_check(), CHECK_VERIFY(this)); 693 if (!atype.is_bool_array() && !atype.is_byte_array()) { 694 verify_error(bci, bad_type_msg, "bastore"); 695 return; 696 } 697 no_control_flow = false; break; 698 case Bytecodes::_castore : 699 current_frame.pop_stack( 700 VerificationType::integer_type(), CHECK_VERIFY(this)); 701 current_frame.pop_stack( 702 VerificationType::integer_type(), CHECK_VERIFY(this)); 703 atype = current_frame.pop_stack( 704 VerificationType::reference_check(), CHECK_VERIFY(this)); 705 if (!atype.is_char_array()) { 706 verify_error(bci, bad_type_msg, "castore"); 707 return; 708 } 709 no_control_flow = false; break; 710 case Bytecodes::_sastore : 711 current_frame.pop_stack( 712 VerificationType::integer_type(), CHECK_VERIFY(this)); 713 current_frame.pop_stack( 714 VerificationType::integer_type(), CHECK_VERIFY(this)); 715 atype = current_frame.pop_stack( 716 VerificationType::reference_check(), CHECK_VERIFY(this)); 717 if (!atype.is_short_array()) { 718 verify_error(bci, bad_type_msg, "sastore"); 719 return; 720 } 721 no_control_flow = false; break; 722 case Bytecodes::_lastore : 723 current_frame.pop_stack_2( 724 VerificationType::long2_type(), 725 VerificationType::long_type(), CHECK_VERIFY(this)); 726 current_frame.pop_stack( 727 VerificationType::integer_type(), CHECK_VERIFY(this)); 728 atype = current_frame.pop_stack( 729 VerificationType::reference_check(), CHECK_VERIFY(this)); 730 if (!atype.is_long_array()) { 731 verify_error(bci, bad_type_msg, "lastore"); 732 return; 733 } 734 no_control_flow = false; break; 735 case Bytecodes::_fastore : 736 current_frame.pop_stack( 737 VerificationType::float_type(), CHECK_VERIFY(this)); 738 current_frame.pop_stack 739 (VerificationType::integer_type(), CHECK_VERIFY(this)); 740 atype = current_frame.pop_stack( 741 VerificationType::reference_check(), CHECK_VERIFY(this)); 742 if (!atype.is_float_array()) { 743 verify_error(bci, bad_type_msg, "fastore"); 744 return; 745 } 746 no_control_flow = false; break; 747 case Bytecodes::_dastore : 748 current_frame.pop_stack_2( 749 VerificationType::double2_type(), 750 VerificationType::double_type(), CHECK_VERIFY(this)); 751 current_frame.pop_stack( 752 VerificationType::integer_type(), CHECK_VERIFY(this)); 753 atype = current_frame.pop_stack( 754 VerificationType::reference_check(), CHECK_VERIFY(this)); 755 if (!atype.is_double_array()) { 756 verify_error(bci, bad_type_msg, "dastore"); 757 return; 758 } 759 no_control_flow = false; break; 760 case Bytecodes::_aastore : 761 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); 762 type2 = current_frame.pop_stack( 763 VerificationType::integer_type(), CHECK_VERIFY(this)); 764 atype = current_frame.pop_stack( 765 VerificationType::reference_check(), CHECK_VERIFY(this)); 766 // more type-checking is done at runtime 767 if (!atype.is_reference_array()) { 768 verify_error(bci, bad_type_msg, "aastore"); 769 return; 770 } 771 // 4938384: relaxed constraint in JVMS 3nd edition. 772 no_control_flow = false; break; 773 case Bytecodes::_pop : 774 current_frame.pop_stack( 775 VerificationType::category1_check(), CHECK_VERIFY(this)); 776 no_control_flow = false; break; 777 case Bytecodes::_pop2 : 778 type = current_frame.pop_stack(CHECK_VERIFY(this)); 779 if (type.is_category1()) { 780 current_frame.pop_stack( 781 VerificationType::category1_check(), CHECK_VERIFY(this)); 782 } else if (type.is_category2_2nd()) { 783 current_frame.pop_stack( 784 VerificationType::category2_check(), CHECK_VERIFY(this)); 785 } else { 786 verify_error(bci, bad_type_msg, "pop2"); 787 return; 788 } 789 no_control_flow = false; break; 790 case Bytecodes::_dup : 791 type = current_frame.pop_stack( 792 VerificationType::category1_check(), CHECK_VERIFY(this)); 793 current_frame.push_stack(type, CHECK_VERIFY(this)); 794 current_frame.push_stack(type, CHECK_VERIFY(this)); 795 no_control_flow = false; break; 796 case Bytecodes::_dup_x1 : 797 type = current_frame.pop_stack( 798 VerificationType::category1_check(), CHECK_VERIFY(this)); 799 type2 = current_frame.pop_stack( 800 VerificationType::category1_check(), CHECK_VERIFY(this)); 801 current_frame.push_stack(type, CHECK_VERIFY(this)); 802 current_frame.push_stack(type2, CHECK_VERIFY(this)); 803 current_frame.push_stack(type, CHECK_VERIFY(this)); 804 no_control_flow = false; break; 805 case Bytecodes::_dup_x2 : 806 { 807 VerificationType type3; 808 type = current_frame.pop_stack( 809 VerificationType::category1_check(), CHECK_VERIFY(this)); 810 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); 811 if (type2.is_category1()) { 812 type3 = current_frame.pop_stack( 813 VerificationType::category1_check(), CHECK_VERIFY(this)); 814 } else if (type2.is_category2_2nd()) { 815 type3 = current_frame.pop_stack( 816 VerificationType::category2_check(), CHECK_VERIFY(this)); 817 } else { 818 verify_error(bci, bad_type_msg, "dup_x2"); 819 return; 820 } 821 current_frame.push_stack(type, CHECK_VERIFY(this)); 822 current_frame.push_stack(type3, CHECK_VERIFY(this)); 823 current_frame.push_stack(type2, CHECK_VERIFY(this)); 824 current_frame.push_stack(type, CHECK_VERIFY(this)); 825 no_control_flow = false; break; 826 } 827 case Bytecodes::_dup2 : 828 type = current_frame.pop_stack(CHECK_VERIFY(this)); 829 if (type.is_category1()) { 830 type2 = current_frame.pop_stack( 831 VerificationType::category1_check(), CHECK_VERIFY(this)); 832 } else if (type.is_category2_2nd()) { 833 type2 = current_frame.pop_stack( 834 VerificationType::category2_check(), CHECK_VERIFY(this)); 835 } else { 836 verify_error(bci, bad_type_msg, "dup2"); 837 return; 838 } 839 current_frame.push_stack(type2, CHECK_VERIFY(this)); 840 current_frame.push_stack(type, CHECK_VERIFY(this)); 841 current_frame.push_stack(type2, CHECK_VERIFY(this)); 842 current_frame.push_stack(type, CHECK_VERIFY(this)); 843 no_control_flow = false; break; 844 case Bytecodes::_dup2_x1 : 845 { 846 VerificationType type3; 847 type = current_frame.pop_stack(CHECK_VERIFY(this)); 848 if (type.is_category1()) { 849 type2 = current_frame.pop_stack( 850 VerificationType::category1_check(), CHECK_VERIFY(this)); 851 } else if(type.is_category2_2nd()) { 852 type2 = current_frame.pop_stack 853 (VerificationType::category2_check(), CHECK_VERIFY(this)); 854 } else { 855 verify_error(bci, bad_type_msg, "dup2_x1"); 856 return; 857 } 858 type3 = current_frame.pop_stack( 859 VerificationType::category1_check(), CHECK_VERIFY(this)); 860 current_frame.push_stack(type2, CHECK_VERIFY(this)); 861 current_frame.push_stack(type, CHECK_VERIFY(this)); 862 current_frame.push_stack(type3, CHECK_VERIFY(this)); 863 current_frame.push_stack(type2, CHECK_VERIFY(this)); 864 current_frame.push_stack(type, CHECK_VERIFY(this)); 865 no_control_flow = false; break; 866 } 867 case Bytecodes::_dup2_x2 : 868 { 869 VerificationType type3, type4; 870 type = current_frame.pop_stack(CHECK_VERIFY(this)); 871 if (type.is_category1()) { 872 type2 = current_frame.pop_stack( 873 VerificationType::category1_check(), CHECK_VERIFY(this)); 874 } else if (type.is_category2_2nd()) { 875 type2 = current_frame.pop_stack( 876 VerificationType::category2_check(), CHECK_VERIFY(this)); 877 } else { 878 verify_error(bci, bad_type_msg, "dup2_x2"); 879 return; 880 } 881 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); 882 if (type3.is_category1()) { 883 type4 = current_frame.pop_stack( 884 VerificationType::category1_check(), CHECK_VERIFY(this)); 885 } else if (type3.is_category2_2nd()) { 886 type4 = current_frame.pop_stack( 887 VerificationType::category2_check(), CHECK_VERIFY(this)); 888 } else { 889 verify_error(bci, bad_type_msg, "dup2_x2"); 890 return; 891 } 892 current_frame.push_stack(type2, CHECK_VERIFY(this)); 893 current_frame.push_stack(type, CHECK_VERIFY(this)); 894 current_frame.push_stack(type4, CHECK_VERIFY(this)); 895 current_frame.push_stack(type3, CHECK_VERIFY(this)); 896 current_frame.push_stack(type2, CHECK_VERIFY(this)); 897 current_frame.push_stack(type, CHECK_VERIFY(this)); 898 no_control_flow = false; break; 899 } 900 case Bytecodes::_swap : 901 type = current_frame.pop_stack( 902 VerificationType::category1_check(), CHECK_VERIFY(this)); 903 type2 = current_frame.pop_stack( 904 VerificationType::category1_check(), CHECK_VERIFY(this)); 905 current_frame.push_stack(type, CHECK_VERIFY(this)); 906 current_frame.push_stack(type2, CHECK_VERIFY(this)); 907 no_control_flow = false; break; 908 case Bytecodes::_iadd : 909 case Bytecodes::_isub : 910 case Bytecodes::_imul : 911 case Bytecodes::_idiv : 912 case Bytecodes::_irem : 913 case Bytecodes::_ishl : 914 case Bytecodes::_ishr : 915 case Bytecodes::_iushr : 916 case Bytecodes::_ior : 917 case Bytecodes::_ixor : 918 case Bytecodes::_iand : 919 current_frame.pop_stack( 920 VerificationType::integer_type(), CHECK_VERIFY(this)); 921 // fall through 922 case Bytecodes::_ineg : 923 current_frame.pop_stack( 924 VerificationType::integer_type(), CHECK_VERIFY(this)); 925 current_frame.push_stack( 926 VerificationType::integer_type(), CHECK_VERIFY(this)); 927 no_control_flow = false; break; 928 case Bytecodes::_ladd : 929 case Bytecodes::_lsub : 930 case Bytecodes::_lmul : 931 case Bytecodes::_ldiv : 932 case Bytecodes::_lrem : 933 case Bytecodes::_land : 934 case Bytecodes::_lor : 935 case Bytecodes::_lxor : 936 current_frame.pop_stack_2( 937 VerificationType::long2_type(), 938 VerificationType::long_type(), CHECK_VERIFY(this)); 939 // fall through 940 case Bytecodes::_lneg : 941 current_frame.pop_stack_2( 942 VerificationType::long2_type(), 943 VerificationType::long_type(), CHECK_VERIFY(this)); 944 current_frame.push_stack_2( 945 VerificationType::long_type(), 946 VerificationType::long2_type(), CHECK_VERIFY(this)); 947 no_control_flow = false; break; 948 case Bytecodes::_lshl : 949 case Bytecodes::_lshr : 950 case Bytecodes::_lushr : 951 current_frame.pop_stack( 952 VerificationType::integer_type(), CHECK_VERIFY(this)); 953 current_frame.pop_stack_2( 954 VerificationType::long2_type(), 955 VerificationType::long_type(), CHECK_VERIFY(this)); 956 current_frame.push_stack_2( 957 VerificationType::long_type(), 958 VerificationType::long2_type(), CHECK_VERIFY(this)); 959 no_control_flow = false; break; 960 case Bytecodes::_fadd : 961 case Bytecodes::_fsub : 962 case Bytecodes::_fmul : 963 case Bytecodes::_fdiv : 964 case Bytecodes::_frem : 965 current_frame.pop_stack( 966 VerificationType::float_type(), CHECK_VERIFY(this)); 967 // fall through 968 case Bytecodes::_fneg : 969 current_frame.pop_stack( 970 VerificationType::float_type(), CHECK_VERIFY(this)); 971 current_frame.push_stack( 972 VerificationType::float_type(), CHECK_VERIFY(this)); 973 no_control_flow = false; break; 974 case Bytecodes::_dadd : 975 case Bytecodes::_dsub : 976 case Bytecodes::_dmul : 977 case Bytecodes::_ddiv : 978 case Bytecodes::_drem : 979 current_frame.pop_stack_2( 980 VerificationType::double2_type(), 981 VerificationType::double_type(), CHECK_VERIFY(this)); 982 // fall through 983 case Bytecodes::_dneg : 984 current_frame.pop_stack_2( 985 VerificationType::double2_type(), 986 VerificationType::double_type(), CHECK_VERIFY(this)); 987 current_frame.push_stack_2( 988 VerificationType::double_type(), 989 VerificationType::double2_type(), CHECK_VERIFY(this)); 990 no_control_flow = false; break; 991 case Bytecodes::_iinc : 992 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); 993 no_control_flow = false; break; 994 case Bytecodes::_i2l : 995 type = current_frame.pop_stack( 996 VerificationType::integer_type(), CHECK_VERIFY(this)); 997 current_frame.push_stack_2( 998 VerificationType::long_type(), 999 VerificationType::long2_type(), CHECK_VERIFY(this)); 1000 no_control_flow = false; break; 1001 case Bytecodes::_l2i : 1002 current_frame.pop_stack_2( 1003 VerificationType::long2_type(), 1004 VerificationType::long_type(), CHECK_VERIFY(this)); 1005 current_frame.push_stack( 1006 VerificationType::integer_type(), CHECK_VERIFY(this)); 1007 no_control_flow = false; break; 1008 case Bytecodes::_i2f : 1009 current_frame.pop_stack( 1010 VerificationType::integer_type(), CHECK_VERIFY(this)); 1011 current_frame.push_stack( 1012 VerificationType::float_type(), CHECK_VERIFY(this)); 1013 no_control_flow = false; break; 1014 case Bytecodes::_i2d : 1015 current_frame.pop_stack( 1016 VerificationType::integer_type(), CHECK_VERIFY(this)); 1017 current_frame.push_stack_2( 1018 VerificationType::double_type(), 1019 VerificationType::double2_type(), CHECK_VERIFY(this)); 1020 no_control_flow = false; break; 1021 case Bytecodes::_l2f : 1022 current_frame.pop_stack_2( 1023 VerificationType::long2_type(), 1024 VerificationType::long_type(), CHECK_VERIFY(this)); 1025 current_frame.push_stack( 1026 VerificationType::float_type(), CHECK_VERIFY(this)); 1027 no_control_flow = false; break; 1028 case Bytecodes::_l2d : 1029 current_frame.pop_stack_2( 1030 VerificationType::long2_type(), 1031 VerificationType::long_type(), CHECK_VERIFY(this)); 1032 current_frame.push_stack_2( 1033 VerificationType::double_type(), 1034 VerificationType::double2_type(), CHECK_VERIFY(this)); 1035 no_control_flow = false; break; 1036 case Bytecodes::_f2i : 1037 current_frame.pop_stack( 1038 VerificationType::float_type(), CHECK_VERIFY(this)); 1039 current_frame.push_stack( 1040 VerificationType::integer_type(), CHECK_VERIFY(this)); 1041 no_control_flow = false; break; 1042 case Bytecodes::_f2l : 1043 current_frame.pop_stack( 1044 VerificationType::float_type(), CHECK_VERIFY(this)); 1045 current_frame.push_stack_2( 1046 VerificationType::long_type(), 1047 VerificationType::long2_type(), CHECK_VERIFY(this)); 1048 no_control_flow = false; break; 1049 case Bytecodes::_f2d : 1050 current_frame.pop_stack( 1051 VerificationType::float_type(), CHECK_VERIFY(this)); 1052 current_frame.push_stack_2( 1053 VerificationType::double_type(), 1054 VerificationType::double2_type(), CHECK_VERIFY(this)); 1055 no_control_flow = false; break; 1056 case Bytecodes::_d2i : 1057 current_frame.pop_stack_2( 1058 VerificationType::double2_type(), 1059 VerificationType::double_type(), CHECK_VERIFY(this)); 1060 current_frame.push_stack( 1061 VerificationType::integer_type(), CHECK_VERIFY(this)); 1062 no_control_flow = false; break; 1063 case Bytecodes::_d2l : 1064 current_frame.pop_stack_2( 1065 VerificationType::double2_type(), 1066 VerificationType::double_type(), CHECK_VERIFY(this)); 1067 current_frame.push_stack_2( 1068 VerificationType::long_type(), 1069 VerificationType::long2_type(), CHECK_VERIFY(this)); 1070 no_control_flow = false; break; 1071 case Bytecodes::_d2f : 1072 current_frame.pop_stack_2( 1073 VerificationType::double2_type(), 1074 VerificationType::double_type(), CHECK_VERIFY(this)); 1075 current_frame.push_stack( 1076 VerificationType::float_type(), CHECK_VERIFY(this)); 1077 no_control_flow = false; break; 1078 case Bytecodes::_i2b : 1079 case Bytecodes::_i2c : 1080 case Bytecodes::_i2s : 1081 current_frame.pop_stack( 1082 VerificationType::integer_type(), CHECK_VERIFY(this)); 1083 current_frame.push_stack( 1084 VerificationType::integer_type(), CHECK_VERIFY(this)); 1085 no_control_flow = false; break; 1086 case Bytecodes::_lcmp : 1087 current_frame.pop_stack_2( 1088 VerificationType::long2_type(), 1089 VerificationType::long_type(), CHECK_VERIFY(this)); 1090 current_frame.pop_stack_2( 1091 VerificationType::long2_type(), 1092 VerificationType::long_type(), CHECK_VERIFY(this)); 1093 current_frame.push_stack( 1094 VerificationType::integer_type(), CHECK_VERIFY(this)); 1095 no_control_flow = false; break; 1096 case Bytecodes::_fcmpl : 1097 case Bytecodes::_fcmpg : 1098 current_frame.pop_stack( 1099 VerificationType::float_type(), CHECK_VERIFY(this)); 1100 current_frame.pop_stack( 1101 VerificationType::float_type(), CHECK_VERIFY(this)); 1102 current_frame.push_stack( 1103 VerificationType::integer_type(), CHECK_VERIFY(this)); 1104 no_control_flow = false; break; 1105 case Bytecodes::_dcmpl : 1106 case Bytecodes::_dcmpg : 1107 current_frame.pop_stack_2( 1108 VerificationType::double2_type(), 1109 VerificationType::double_type(), CHECK_VERIFY(this)); 1110 current_frame.pop_stack_2( 1111 VerificationType::double2_type(), 1112 VerificationType::double_type(), CHECK_VERIFY(this)); 1113 current_frame.push_stack( 1114 VerificationType::integer_type(), CHECK_VERIFY(this)); 1115 no_control_flow = false; break; 1116 case Bytecodes::_if_icmpeq: 1117 case Bytecodes::_if_icmpne: 1118 case Bytecodes::_if_icmplt: 1119 case Bytecodes::_if_icmpge: 1120 case Bytecodes::_if_icmpgt: 1121 case Bytecodes::_if_icmple: 1122 current_frame.pop_stack( 1123 VerificationType::integer_type(), CHECK_VERIFY(this)); 1124 // fall through 1125 case Bytecodes::_ifeq: 1126 case Bytecodes::_ifne: 1127 case Bytecodes::_iflt: 1128 case Bytecodes::_ifge: 1129 case Bytecodes::_ifgt: 1130 case Bytecodes::_ifle: 1131 current_frame.pop_stack( 1132 VerificationType::integer_type(), CHECK_VERIFY(this)); 1133 target = bcs.dest(); 1134 stackmap_table.check_jump_target( 1135 ¤t_frame, target, CHECK_VERIFY(this)); 1136 no_control_flow = false; break; 1137 case Bytecodes::_if_acmpeq : 1138 case Bytecodes::_if_acmpne : 1139 current_frame.pop_stack( 1140 VerificationType::reference_check(), CHECK_VERIFY(this)); 1141 // fall through 1142 case Bytecodes::_ifnull : 1143 case Bytecodes::_ifnonnull : 1144 current_frame.pop_stack( 1145 VerificationType::reference_check(), CHECK_VERIFY(this)); 1146 target = bcs.dest(); 1147 stackmap_table.check_jump_target 1148 (¤t_frame, target, CHECK_VERIFY(this)); 1149 no_control_flow = false; break; 1150 case Bytecodes::_goto : 1151 target = bcs.dest(); 1152 stackmap_table.check_jump_target( 1153 ¤t_frame, target, CHECK_VERIFY(this)); 1154 no_control_flow = true; break; 1155 case Bytecodes::_goto_w : 1156 target = bcs.dest_w(); 1157 stackmap_table.check_jump_target( 1158 ¤t_frame, target, CHECK_VERIFY(this)); 1159 no_control_flow = true; break; 1160 case Bytecodes::_tableswitch : 1161 case Bytecodes::_lookupswitch : 1162 verify_switch( 1163 &bcs, code_length, code_data, ¤t_frame, 1164 &stackmap_table, CHECK_VERIFY(this)); 1165 no_control_flow = true; break; 1166 case Bytecodes::_ireturn : 1167 type = current_frame.pop_stack( 1168 VerificationType::integer_type(), CHECK_VERIFY(this)); 1169 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); 1170 no_control_flow = true; break; 1171 case Bytecodes::_lreturn : 1172 type2 = current_frame.pop_stack( 1173 VerificationType::long2_type(), CHECK_VERIFY(this)); 1174 type = current_frame.pop_stack( 1175 VerificationType::long_type(), CHECK_VERIFY(this)); 1176 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); 1177 no_control_flow = true; break; 1178 case Bytecodes::_freturn : 1179 type = current_frame.pop_stack( 1180 VerificationType::float_type(), CHECK_VERIFY(this)); 1181 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); 1182 no_control_flow = true; break; 1183 case Bytecodes::_dreturn : 1184 type2 = current_frame.pop_stack( 1185 VerificationType::double2_type(), CHECK_VERIFY(this)); 1186 type = current_frame.pop_stack( 1187 VerificationType::double_type(), CHECK_VERIFY(this)); 1188 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); 1189 no_control_flow = true; break; 1190 case Bytecodes::_areturn : 1191 type = current_frame.pop_stack( 1192 VerificationType::reference_check(), CHECK_VERIFY(this)); 1193 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); 1194 no_control_flow = true; break; 1195 case Bytecodes::_return : 1196 if (return_type != VerificationType::bogus_type()) { 1197 verify_error(bci, "Method expects no return value"); 1198 return; 1199 } 1200 // Make sure "this" has been initialized if current method is an 1201 // <init> 1202 if (_method->name() == vmSymbols::object_initializer_name() && 1203 current_frame.flag_this_uninit()) { 1204 verify_error(bci, 1205 "Constructor must call super() or this() before return"); 1206 return; 1207 } 1208 no_control_flow = true; break; 1209 case Bytecodes::_getstatic : 1210 case Bytecodes::_putstatic : 1211 case Bytecodes::_getfield : 1212 case Bytecodes::_putfield : 1213 verify_field_instructions( 1214 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); 1215 no_control_flow = false; break; 1216 case Bytecodes::_invokevirtual : 1217 case Bytecodes::_invokespecial : 1218 case Bytecodes::_invokestatic : 1219 verify_invoke_instructions( 1220 &bcs, code_length, ¤t_frame, 1221 &this_uninit, return_type, cp, CHECK_VERIFY(this)); 1222 no_control_flow = false; break; 1223 case Bytecodes::_invokeinterface : 1224 case Bytecodes::_invokedynamic : 1225 verify_invoke_instructions( 1226 &bcs, code_length, ¤t_frame, 1227 &this_uninit, return_type, cp, CHECK_VERIFY(this)); 1228 no_control_flow = false; break; 1229 case Bytecodes::_new : 1230 { 1231 index = bcs.get_index_u2(); 1232 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); 1233 VerificationType new_class_type = 1234 cp_index_to_type(index, cp, CHECK_VERIFY(this)); 1235 if (!new_class_type.is_object()) { 1236 verify_error(bci, "Illegal new instruction"); 1237 return; 1238 } 1239 type = VerificationType::uninitialized_type(bci); 1240 current_frame.push_stack(type, CHECK_VERIFY(this)); 1241 no_control_flow = false; break; 1242 } 1243 case Bytecodes::_newarray : 1244 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); 1245 current_frame.pop_stack( 1246 VerificationType::integer_type(), CHECK_VERIFY(this)); 1247 current_frame.push_stack(type, CHECK_VERIFY(this)); 1248 no_control_flow = false; break; 1249 case Bytecodes::_anewarray : 1250 verify_anewarray( 1251 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); 1252 no_control_flow = false; break; 1253 case Bytecodes::_arraylength : 1254 type = current_frame.pop_stack( 1255 VerificationType::reference_check(), CHECK_VERIFY(this)); 1256 if (!(type.is_null() || type.is_array())) { 1257 verify_error(bci, bad_type_msg, "arraylength"); 1258 } 1259 current_frame.push_stack( 1260 VerificationType::integer_type(), CHECK_VERIFY(this)); 1261 no_control_flow = false; break; 1262 case Bytecodes::_checkcast : 1263 { 1264 index = bcs.get_index_u2(); 1265 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); 1266 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); 1267 VerificationType klass_type = cp_index_to_type( 1268 index, cp, CHECK_VERIFY(this)); 1269 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); 1270 no_control_flow = false; break; 1271 } 1272 case Bytecodes::_instanceof : { 1273 index = bcs.get_index_u2(); 1274 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); 1275 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); 1276 current_frame.push_stack( 1277 VerificationType::integer_type(), CHECK_VERIFY(this)); 1278 no_control_flow = false; break; 1279 } 1280 case Bytecodes::_monitorenter : 1281 case Bytecodes::_monitorexit : 1282 current_frame.pop_stack( 1283 VerificationType::reference_check(), CHECK_VERIFY(this)); 1284 no_control_flow = false; break; 1285 case Bytecodes::_multianewarray : 1286 { 1287 index = bcs.get_index_u2(); 1288 u2 dim = *(bcs.bcp()+3); 1289 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); 1290 VerificationType new_array_type = 1291 cp_index_to_type(index, cp, CHECK_VERIFY(this)); 1292 if (!new_array_type.is_array()) { 1293 verify_error(bci, 1294 "Illegal constant pool index in multianewarray instruction"); 1295 return; 1296 } 1297 if (dim < 1 || new_array_type.dimensions() < dim) { 1298 verify_error(bci, 1299 "Illegal dimension in multianewarray instruction"); 1300 return; 1301 } 1302 for (int i = 0; i < dim; i++) { 1303 current_frame.pop_stack( 1304 VerificationType::integer_type(), CHECK_VERIFY(this)); 1305 } 1306 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); 1307 no_control_flow = false; break; 1308 } 1309 case Bytecodes::_athrow : 1310 type = VerificationType::reference_type( 1311 vmSymbols::java_lang_Throwable()); 1312 current_frame.pop_stack(type, CHECK_VERIFY(this)); 1313 no_control_flow = true; break; 1314 default: 1315 // We only need to check the valid bytecodes in class file. 1316 // And jsr and ret are not in the new class file format in JDK1.5. 1317 verify_error(bci, "Bad instruction"); 1318 no_control_flow = false; 1319 return; 1320 } // end switch 1321 } // end Merge with the next instruction 1322 1323 // Look for possible jump target in exception handlers and see if it 1324 // matches current_frame 1325 if (bci >= ex_min && bci < ex_max) { 1326 verify_exception_handler_targets( 1327 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); 1328 } 1329 } // end while 1330 1331 // Make sure that control flow does not fall through end of the method 1332 if (!no_control_flow) { 1333 verify_error(code_length, "Control flow falls through code end"); 1334 return; 1335 } 1336} 1337 1338char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { 1339 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); 1340 memset(code_data, 0, sizeof(char) * code_length); 1341 RawBytecodeStream bcs(m); 1342 1343 while (!bcs.is_last_bytecode()) { 1344 if (bcs.raw_next() != Bytecodes::_illegal) { 1345 int bci = bcs.bci(); 1346 if (bcs.raw_code() == Bytecodes::_new) { 1347 code_data[bci] = NEW_OFFSET; 1348 } else { 1349 code_data[bci] = BYTECODE_OFFSET; 1350 } 1351 } else { 1352 verify_error(bcs.bci(), "Bad instruction"); 1353 return NULL; 1354 } 1355 } 1356 1357 return code_data; 1358} 1359 1360void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { 1361 typeArrayHandle exhandlers (THREAD, _method->exception_table()); 1362 constantPoolHandle cp (THREAD, _method->constants()); 1363 1364 if (exhandlers() != NULL) { 1365 for(int i = 0; i < exhandlers->length();) { 1366 u2 start_pc = exhandlers->int_at(i++); 1367 u2 end_pc = exhandlers->int_at(i++); 1368 u2 handler_pc = exhandlers->int_at(i++); 1369 if (start_pc >= code_length || code_data[start_pc] == 0) { 1370 class_format_error("Illegal exception table start_pc %d", start_pc); 1371 return; 1372 } 1373 if (end_pc != code_length) { // special case: end_pc == code_length 1374 if (end_pc > code_length || code_data[end_pc] == 0) { 1375 class_format_error("Illegal exception table end_pc %d", end_pc); 1376 return; 1377 } 1378 } 1379 if (handler_pc >= code_length || code_data[handler_pc] == 0) { 1380 class_format_error("Illegal exception table handler_pc %d", handler_pc); 1381 return; 1382 } 1383 int catch_type_index = exhandlers->int_at(i++); 1384 if (catch_type_index != 0) { 1385 VerificationType catch_type = cp_index_to_type( 1386 catch_type_index, cp, CHECK_VERIFY(this)); 1387 VerificationType throwable = 1388 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); 1389 bool is_subclass = throwable.is_assignable_from( 1390 catch_type, current_class(), CHECK_VERIFY(this)); 1391 if (!is_subclass) { 1392 // 4286534: should throw VerifyError according to recent spec change 1393 verify_error( 1394 "Catch type is not a subclass of Throwable in handler %d", 1395 handler_pc); 1396 return; 1397 } 1398 } 1399 if (start_pc < min) min = start_pc; 1400 if (end_pc > max) max = end_pc; 1401 } 1402 } 1403} 1404 1405void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { 1406 int localvariable_table_length = _method()->localvariable_table_length(); 1407 if (localvariable_table_length > 0) { 1408 LocalVariableTableElement* table = _method()->localvariable_table_start(); 1409 for (int i = 0; i < localvariable_table_length; i++) { 1410 u2 start_bci = table[i].start_bci; 1411 u2 length = table[i].length; 1412 1413 if (start_bci >= code_length || code_data[start_bci] == 0) { 1414 class_format_error( 1415 "Illegal local variable table start_pc %d", start_bci); 1416 return; 1417 } 1418 u4 end_bci = (u4)(start_bci + length); 1419 if (end_bci != code_length) { 1420 if (end_bci >= code_length || code_data[end_bci] == 0) { 1421 class_format_error( "Illegal local variable table length %d", length); 1422 return; 1423 } 1424 } 1425 } 1426 } 1427} 1428 1429u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, 1430 StackMapFrame* current_frame, 1431 StackMapTable* stackmap_table, 1432 bool no_control_flow, TRAPS) { 1433 if (stackmap_index < stackmap_table->get_frame_count()) { 1434 u2 this_offset = stackmap_table->get_offset(stackmap_index); 1435 if (no_control_flow && this_offset > bci) { 1436 verify_error(bci, "Expecting a stack map frame"); 1437 return 0; 1438 } 1439 if (this_offset == bci) { 1440 // See if current stack map can be assigned to the frame in table. 1441 // current_frame is the stackmap frame got from the last instruction. 1442 // If matched, current_frame will be updated by this method. 1443 bool match = stackmap_table->match_stackmap( 1444 current_frame, this_offset, stackmap_index, 1445 !no_control_flow, true, CHECK_VERIFY_(this, 0)); 1446 if (!match) { 1447 // report type error 1448 verify_error(bci, "Instruction type does not match stack map"); 1449 return 0; 1450 } 1451 stackmap_index++; 1452 } else if (this_offset < bci) { 1453 // current_offset should have met this_offset. 1454 class_format_error("Bad stack map offset %d", this_offset); 1455 return 0; 1456 } 1457 } else if (no_control_flow) { 1458 verify_error(bci, "Expecting a stack map frame"); 1459 return 0; 1460 } 1461 return stackmap_index; 1462} 1463 1464void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, 1465 StackMapTable* stackmap_table, TRAPS) { 1466 constantPoolHandle cp (THREAD, _method->constants()); 1467 typeArrayHandle exhandlers (THREAD, _method->exception_table()); 1468 if (exhandlers() != NULL) { 1469 for(int i = 0; i < exhandlers->length();) { 1470 u2 start_pc = exhandlers->int_at(i++); 1471 u2 end_pc = exhandlers->int_at(i++); 1472 u2 handler_pc = exhandlers->int_at(i++); 1473 int catch_type_index = exhandlers->int_at(i++); 1474 if(bci >= start_pc && bci < end_pc) { 1475 u1 flags = current_frame->flags(); 1476 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } 1477 1478 ResourceMark rm(THREAD); 1479 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); 1480 if (catch_type_index != 0) { 1481 // We know that this index refers to a subclass of Throwable 1482 VerificationType catch_type = cp_index_to_type( 1483 catch_type_index, cp, CHECK_VERIFY(this)); 1484 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); 1485 } else { 1486 VerificationType throwable = 1487 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); 1488 new_frame->push_stack(throwable, CHECK_VERIFY(this)); 1489 } 1490 bool match = stackmap_table->match_stackmap( 1491 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); 1492 if (!match) { 1493 verify_error(bci, 1494 "Stack map does not match the one at exception handler %d", 1495 handler_pc); 1496 return; 1497 } 1498 } 1499 } 1500 } 1501} 1502 1503void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { 1504 int nconstants = cp->length(); 1505 if ((index <= 0) || (index >= nconstants)) { 1506 verify_error("Illegal constant pool index %d in class %s", 1507 index, instanceKlass::cast(cp->pool_holder())->external_name()); 1508 return; 1509 } 1510} 1511 1512void ClassVerifier::verify_cp_type( 1513 int index, constantPoolHandle cp, unsigned int types, TRAPS) { 1514 1515 // In some situations, bytecode rewriting may occur while we're verifying. 1516 // In this case, a constant pool cache exists and some indices refer to that 1517 // instead. Be sure we don't pick up such indices by accident. 1518 // We must check was_recursively_verified() before we get here. 1519 guarantee(cp->cache() == NULL, "not rewritten yet"); 1520 1521 verify_cp_index(cp, index, CHECK_VERIFY(this)); 1522 unsigned int tag = cp->tag_at(index).value(); 1523 if ((types & (1 << tag)) == 0) { 1524 verify_error( 1525 "Illegal type at constant pool entry %d in class %s", 1526 index, instanceKlass::cast(cp->pool_holder())->external_name()); 1527 return; 1528 } 1529} 1530 1531void ClassVerifier::verify_cp_class_type( 1532 int index, constantPoolHandle cp, TRAPS) { 1533 verify_cp_index(cp, index, CHECK_VERIFY(this)); 1534 constantTag tag = cp->tag_at(index); 1535 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1536 verify_error("Illegal type at constant pool entry %d in class %s", 1537 index, instanceKlass::cast(cp->pool_holder())->external_name()); 1538 return; 1539 } 1540} 1541 1542void ClassVerifier::format_error_message( 1543 const char* fmt, int offset, va_list va) { 1544 ResourceMark rm(_thread); 1545 stringStream message(_message, _message_buffer_len); 1546 message.vprint(fmt, va); 1547 if (!_method.is_null()) { 1548 message.print(" in method %s", _method->name_and_sig_as_C_string()); 1549 } 1550 if (offset != -1) { 1551 message.print(" at offset %d", offset); 1552 } 1553} 1554 1555void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { 1556 _exception_type = vmSymbols::java_lang_VerifyError(); 1557 va_list va; 1558 va_start(va, fmt); 1559 format_error_message(fmt, offset, va); 1560 va_end(va); 1561} 1562 1563void ClassVerifier::verify_error(const char* fmt, ...) { 1564 _exception_type = vmSymbols::java_lang_VerifyError(); 1565 va_list va; 1566 va_start(va, fmt); 1567 format_error_message(fmt, -1, va); 1568 va_end(va); 1569} 1570 1571void ClassVerifier::class_format_error(const char* msg, ...) { 1572 _exception_type = vmSymbols::java_lang_ClassFormatError(); 1573 va_list va; 1574 va_start(va, msg); 1575 format_error_message(msg, -1, va); 1576 va_end(va); 1577} 1578 1579klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { 1580 // Get current loader and protection domain first. 1581 oop loader = current_class()->class_loader(); 1582 oop protection_domain = current_class()->protection_domain(); 1583 1584 return SystemDictionary::resolve_or_fail( 1585 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), 1586 true, CHECK_NULL); 1587} 1588 1589bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, 1590 klassOop target_class, 1591 symbolOop field_name, 1592 symbolOop field_sig, 1593 bool is_method) { 1594 No_Safepoint_Verifier nosafepoint; 1595 1596 // If target class isn't a super class of this class, we don't worry about this case 1597 if (!this_class->is_subclass_of(target_class)) { 1598 return false; 1599 } 1600 // Check if the specified method or field is protected 1601 instanceKlass* target_instance = instanceKlass::cast(target_class); 1602 fieldDescriptor fd; 1603 if (is_method) { 1604 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); 1605 if (m != NULL && m->is_protected()) { 1606 if (!this_class->is_same_class_package(m->method_holder())) { 1607 return true; 1608 } 1609 } 1610 } else { 1611 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); 1612 if(member_klass != NULL && fd.is_protected()) { 1613 if (!this_class->is_same_class_package(member_klass)) { 1614 return true; 1615 } 1616 } 1617 } 1618 return false; 1619} 1620 1621void ClassVerifier::verify_ldc( 1622 int opcode, u2 index, StackMapFrame *current_frame, 1623 constantPoolHandle cp, u2 bci, TRAPS) { 1624 verify_cp_index(cp, index, CHECK_VERIFY(this)); 1625 constantTag tag = cp->tag_at(index); 1626 unsigned int types; 1627 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { 1628 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { 1629 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) 1630 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) 1631 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); 1632 // Note: The class file parser already verified the legality of 1633 // MethodHandle and MethodType constants. 1634 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); 1635 } 1636 } else { 1637 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); 1638 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); 1639 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); 1640 } 1641 if (tag.is_string() && cp->is_pseudo_string_at(index)) { 1642 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); 1643 } else if (tag.is_string() || tag.is_unresolved_string()) { 1644 current_frame->push_stack( 1645 VerificationType::reference_type( 1646 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); 1647 } else if (tag.is_klass() || tag.is_unresolved_klass()) { 1648 current_frame->push_stack( 1649 VerificationType::reference_type( 1650 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); 1651 } else if (tag.is_int()) { 1652 current_frame->push_stack( 1653 VerificationType::integer_type(), CHECK_VERIFY(this)); 1654 } else if (tag.is_float()) { 1655 current_frame->push_stack( 1656 VerificationType::float_type(), CHECK_VERIFY(this)); 1657 } else if (tag.is_double()) { 1658 current_frame->push_stack_2( 1659 VerificationType::double_type(), 1660 VerificationType::double2_type(), CHECK_VERIFY(this)); 1661 } else if (tag.is_long()) { 1662 current_frame->push_stack_2( 1663 VerificationType::long_type(), 1664 VerificationType::long2_type(), CHECK_VERIFY(this)); 1665 } else if (tag.is_method_handle()) { 1666 current_frame->push_stack( 1667 VerificationType::reference_type( 1668 vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); 1669 } else if (tag.is_method_type()) { 1670 current_frame->push_stack( 1671 VerificationType::reference_type( 1672 vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); 1673 } else { 1674 verify_error(bci, "Invalid index in ldc"); 1675 return; 1676 } 1677} 1678 1679void ClassVerifier::verify_switch( 1680 RawBytecodeStream* bcs, u4 code_length, char* code_data, 1681 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { 1682 int bci = bcs->bci(); 1683 address bcp = bcs->bcp(); 1684 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); 1685 1686 // 4639449 & 4647081: padding bytes must be 0 1687 u2 padding_offset = 1; 1688 while ((bcp + padding_offset) < aligned_bcp) { 1689 if(*(bcp + padding_offset) != 0) { 1690 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); 1691 return; 1692 } 1693 padding_offset++; 1694 } 1695 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); 1696 int keys, delta; 1697 current_frame->pop_stack( 1698 VerificationType::integer_type(), CHECK_VERIFY(this)); 1699 if (bcs->raw_code() == Bytecodes::_tableswitch) { 1700 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); 1701 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); 1702 if (low > high) { 1703 verify_error(bci, 1704 "low must be less than or equal to high in tableswitch"); 1705 return; 1706 } 1707 keys = high - low + 1; 1708 if (keys < 0) { 1709 verify_error(bci, "too many keys in tableswitch"); 1710 return; 1711 } 1712 delta = 1; 1713 } else { 1714 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); 1715 if (keys < 0) { 1716 verify_error(bci, "number of keys in lookupswitch less than 0"); 1717 return; 1718 } 1719 delta = 2; 1720 // Make sure that the lookupswitch items are sorted 1721 for (int i = 0; i < (keys - 1); i++) { 1722 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); 1723 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); 1724 if (this_key >= next_key) { 1725 verify_error(bci, "Bad lookupswitch instruction"); 1726 return; 1727 } 1728 } 1729 } 1730 int target = bci + default_offset; 1731 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); 1732 for (int i = 0; i < keys; i++) { 1733 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); 1734 stackmap_table->check_jump_target( 1735 current_frame, target, CHECK_VERIFY(this)); 1736 } 1737} 1738 1739bool ClassVerifier::name_in_supers( 1740 symbolOop ref_name, instanceKlassHandle current) { 1741 klassOop super = current->super(); 1742 while (super != NULL) { 1743 if (super->klass_part()->name() == ref_name) { 1744 return true; 1745 } 1746 super = super->klass_part()->super(); 1747 } 1748 return false; 1749} 1750 1751void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, 1752 StackMapFrame* current_frame, 1753 constantPoolHandle cp, 1754 TRAPS) { 1755 u2 index = bcs->get_index_u2(); 1756 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); 1757 1758 // Get field name and signature 1759 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); 1760 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); 1761 1762 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { 1763 class_format_error( 1764 "Invalid signature for field in class %s referenced " 1765 "from constant pool index %d", _klass->external_name(), index); 1766 return; 1767 } 1768 1769 // Get referenced class type 1770 VerificationType ref_class_type = cp_ref_index_to_type( 1771 index, cp, CHECK_VERIFY(this)); 1772 if (!ref_class_type.is_object()) { 1773 verify_error( 1774 "Expecting reference to class in class %s at constant pool index %d", 1775 _klass->external_name(), index); 1776 return; 1777 } 1778 VerificationType target_class_type = ref_class_type; 1779 1780 assert(sizeof(VerificationType) == sizeof(uintptr_t), 1781 "buffer type must match VerificationType size"); 1782 uintptr_t field_type_buffer[2]; 1783 VerificationType* field_type = (VerificationType*)field_type_buffer; 1784 // If we make a VerificationType[2] array directly, the compiler calls 1785 // to the c-runtime library to do the allocation instead of just 1786 // stack allocating it. Plus it would run constructors. This shows up 1787 // in performance profiles. 1788 1789 SignatureStream sig_stream(field_sig, false); 1790 VerificationType stack_object_type; 1791 int n = change_sig_to_verificationType( 1792 &sig_stream, field_type, CHECK_VERIFY(this)); 1793 u2 bci = bcs->bci(); 1794 bool is_assignable; 1795 switch (bcs->raw_code()) { 1796 case Bytecodes::_getstatic: { 1797 for (int i = 0; i < n; i++) { 1798 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); 1799 } 1800 break; 1801 } 1802 case Bytecodes::_putstatic: { 1803 for (int i = n - 1; i >= 0; i--) { 1804 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); 1805 } 1806 break; 1807 } 1808 case Bytecodes::_getfield: { 1809 stack_object_type = current_frame->pop_stack( 1810 target_class_type, CHECK_VERIFY(this)); 1811 for (int i = 0; i < n; i++) { 1812 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); 1813 } 1814 goto check_protected; 1815 } 1816 case Bytecodes::_putfield: { 1817 for (int i = n - 1; i >= 0; i--) { 1818 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); 1819 } 1820 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); 1821 1822 // The JVMS 2nd edition allows field initialization before the superclass 1823 // initializer, if the field is defined within the current class. 1824 fieldDescriptor fd; 1825 if (stack_object_type == VerificationType::uninitialized_this_type() && 1826 target_class_type.equals(current_type()) && 1827 _klass->find_local_field(field_name(), field_sig(), &fd)) { 1828 stack_object_type = current_type(); 1829 } 1830 is_assignable = target_class_type.is_assignable_from( 1831 stack_object_type, current_class(), CHECK_VERIFY(this)); 1832 if (!is_assignable) { 1833 verify_error(bci, "Bad type on operand stack in putfield"); 1834 return; 1835 } 1836 } 1837 check_protected: { 1838 if (_this_type == stack_object_type) 1839 break; // stack_object_type must be assignable to _current_class_type 1840 symbolHandle ref_class_name = symbolHandle(THREAD, 1841 cp->klass_name_at(cp->klass_ref_index_at(index))); 1842 if (!name_in_supers(ref_class_name(), current_class())) 1843 // stack_object_type must be assignable to _current_class_type since: 1844 // 1. stack_object_type must be assignable to ref_class. 1845 // 2. ref_class must be _current_class or a subclass of it. It can't 1846 // be a superclass of it. See revised JVMS 5.4.4. 1847 break; 1848 1849 klassOop ref_class_oop = load_class(ref_class_name, CHECK); 1850 if (is_protected_access(current_class(), ref_class_oop, field_name(), 1851 field_sig(), false)) { 1852 // It's protected access, check if stack object is assignable to 1853 // current class. 1854 is_assignable = current_type().is_assignable_from( 1855 stack_object_type, current_class(), CHECK_VERIFY(this)); 1856 if (!is_assignable) { 1857 verify_error(bci, "Bad access to protected data in getfield"); 1858 return; 1859 } 1860 } 1861 break; 1862 } 1863 default: ShouldNotReachHere(); 1864 } 1865} 1866 1867void ClassVerifier::verify_invoke_init( 1868 RawBytecodeStream* bcs, VerificationType ref_class_type, 1869 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, 1870 constantPoolHandle cp, TRAPS) { 1871 u2 bci = bcs->bci(); 1872 VerificationType type = current_frame->pop_stack( 1873 VerificationType::reference_check(), CHECK_VERIFY(this)); 1874 if (type == VerificationType::uninitialized_this_type()) { 1875 // The method must be an <init> method of either this class, or one of its 1876 // superclasses 1877 if (ref_class_type.name() != current_class()->name() && 1878 !name_in_supers(ref_class_type.name(), current_class())) { 1879 verify_error(bci, "Bad <init> method call"); 1880 return; 1881 } 1882 current_frame->initialize_object(type, current_type()); 1883 *this_uninit = true; 1884 } else if (type.is_uninitialized()) { 1885 u2 new_offset = type.bci(); 1886 address new_bcp = bcs->bcp() - bci + new_offset; 1887 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { 1888 verify_error(new_offset, "Expecting new instruction"); 1889 return; 1890 } 1891 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); 1892 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); 1893 1894 // The method must be an <init> method of the indicated class 1895 VerificationType new_class_type = cp_index_to_type( 1896 new_class_index, cp, CHECK_VERIFY(this)); 1897 if (!new_class_type.equals(ref_class_type)) { 1898 verify_error(bci, "Call to wrong <init> method"); 1899 return; 1900 } 1901 // According to the VM spec, if the referent class is a superclass of the 1902 // current class, and is in a different runtime package, and the method is 1903 // protected, then the objectref must be the current class or a subclass 1904 // of the current class. 1905 VerificationType objectref_type = new_class_type; 1906 if (name_in_supers(ref_class_type.name(), current_class())) { 1907 klassOop ref_klass = load_class( 1908 ref_class_type.name(), CHECK_VERIFY(this)); 1909 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( 1910 vmSymbols::object_initializer_name(), 1911 cp->signature_ref_at(bcs->get_index_u2())); 1912 instanceKlassHandle mh(THREAD, m->method_holder()); 1913 if (m->is_protected() && !mh->is_same_class_package(_klass())) { 1914 bool assignable = current_type().is_assignable_from( 1915 objectref_type, current_class(), CHECK_VERIFY(this)); 1916 if (!assignable) { 1917 verify_error(bci, "Bad access to protected <init> method"); 1918 return; 1919 } 1920 } 1921 } 1922 current_frame->initialize_object(type, new_class_type); 1923 } else { 1924 verify_error(bci, "Bad operand type when invoking <init>"); 1925 return; 1926 } 1927} 1928 1929void ClassVerifier::verify_invoke_instructions( 1930 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, 1931 bool *this_uninit, VerificationType return_type, 1932 constantPoolHandle cp, TRAPS) { 1933 // Make sure the constant pool item is the right type 1934 u2 index = bcs->get_index_u2(); 1935 Bytecodes::Code opcode = bcs->raw_code(); 1936 unsigned int types = (opcode == Bytecodes::_invokeinterface 1937 ? 1 << JVM_CONSTANT_InterfaceMethodref 1938 : opcode == Bytecodes::_invokedynamic 1939 ? ((AllowTransitionalJSR292 ? 1 << JVM_CONSTANT_NameAndType : 0) 1940 |1 << JVM_CONSTANT_InvokeDynamic) 1941 : 1 << JVM_CONSTANT_Methodref); 1942 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); 1943 1944 // Get method name and signature 1945 symbolHandle method_name(THREAD, cp->name_ref_at(index)); 1946 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); 1947 1948 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { 1949 class_format_error( 1950 "Invalid method signature in class %s referenced " 1951 "from constant pool index %d", _klass->external_name(), index); 1952 return; 1953 } 1954 1955 // Get referenced class type 1956 VerificationType ref_class_type; 1957 if (opcode == Bytecodes::_invokedynamic) { 1958 if (!EnableInvokeDynamic || 1959 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 1960 class_format_error( 1961 (!EnableInvokeDynamic ? 1962 "invokedynamic instructions not enabled in this JVM" : 1963 "invokedynamic instructions not supported by this class file version"), 1964 _klass->external_name()); 1965 return; 1966 } 1967 } else { 1968 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); 1969 } 1970 1971 // For a small signature length, we just allocate 128 bytes instead 1972 // of parsing the signature once to find its size. 1973 // -3 is for '(', ')' and return descriptor; multiply by 2 is for 1974 // longs/doubles to be consertive. 1975 assert(sizeof(VerificationType) == sizeof(uintptr_t), 1976 "buffer type must match VerificationType size"); 1977 uintptr_t on_stack_sig_types_buffer[128]; 1978 // If we make a VerificationType[128] array directly, the compiler calls 1979 // to the c-runtime library to do the allocation instead of just 1980 // stack allocating it. Plus it would run constructors. This shows up 1981 // in performance profiles. 1982 1983 VerificationType* sig_types; 1984 int size = (method_sig->utf8_length() - 3) * 2; 1985 if (size > 128) { 1986 // Long and double occupies two slots here. 1987 ArgumentSizeComputer size_it(method_sig); 1988 size = size_it.size(); 1989 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); 1990 } else{ 1991 sig_types = (VerificationType*)on_stack_sig_types_buffer; 1992 } 1993 SignatureStream sig_stream(method_sig); 1994 int sig_i = 0; 1995 while (!sig_stream.at_return_type()) { 1996 sig_i += change_sig_to_verificationType( 1997 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); 1998 sig_stream.next(); 1999 } 2000 int nargs = sig_i; 2001 2002#ifdef ASSERT 2003 { 2004 ArgumentSizeComputer size_it(method_sig); 2005 assert(nargs == size_it.size(), "Argument sizes do not match"); 2006 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); 2007 } 2008#endif 2009 2010 // Check instruction operands 2011 u2 bci = bcs->bci(); 2012 if (opcode == Bytecodes::_invokeinterface) { 2013 address bcp = bcs->bcp(); 2014 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. 2015 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is 2016 // the difference between the size of the operand stack before and after the instruction 2017 // executes. 2018 if (*(bcp+3) != (nargs+1)) { 2019 verify_error(bci, "Inconsistent args count operand in invokeinterface"); 2020 return; 2021 } 2022 if (*(bcp+4) != 0) { 2023 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); 2024 return; 2025 } 2026 } 2027 2028 if (opcode == Bytecodes::_invokedynamic) { 2029 address bcp = bcs->bcp(); 2030 if (*(bcp+3) != 0 || *(bcp+4) != 0) { 2031 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); 2032 return; 2033 } 2034 } 2035 2036 if (method_name->byte_at(0) == '<') { 2037 // Make sure <init> can only be invoked by invokespecial 2038 if (opcode != Bytecodes::_invokespecial || 2039 method_name() != vmSymbols::object_initializer_name()) { 2040 verify_error(bci, "Illegal call to internal method"); 2041 return; 2042 } 2043 } else if (opcode == Bytecodes::_invokespecial 2044 && !ref_class_type.equals(current_type()) 2045 && !ref_class_type.equals(VerificationType::reference_type( 2046 current_class()->super()->klass_part()->name()))) { 2047 bool subtype = ref_class_type.is_assignable_from( 2048 current_type(), current_class(), CHECK_VERIFY(this)); 2049 if (!subtype) { 2050 verify_error(bci, "Bad invokespecial instruction: " 2051 "current class isn't assignable to reference class."); 2052 return; 2053 } 2054 } 2055 // Match method descriptor with operand stack 2056 for (int i = nargs - 1; i >= 0; i--) { // Run backwards 2057 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); 2058 } 2059 // Check objectref on operand stack 2060 if (opcode != Bytecodes::_invokestatic && 2061 opcode != Bytecodes::_invokedynamic) { 2062 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method 2063 verify_invoke_init(bcs, ref_class_type, current_frame, 2064 code_length, this_uninit, cp, CHECK_VERIFY(this)); 2065 } else { // other methods 2066 // Ensures that target class is assignable to method class. 2067 if (opcode == Bytecodes::_invokespecial) { 2068 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); 2069 } else if (opcode == Bytecodes::_invokevirtual) { 2070 VerificationType stack_object_type = 2071 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); 2072 if (current_type() != stack_object_type) { 2073 assert(cp->cache() == NULL, "not rewritten yet"); 2074 symbolHandle ref_class_name = symbolHandle(THREAD, 2075 cp->klass_name_at(cp->klass_ref_index_at(index))); 2076 // See the comments in verify_field_instructions() for 2077 // the rationale behind this. 2078 if (name_in_supers(ref_class_name(), current_class())) { 2079 klassOop ref_class = load_class(ref_class_name, CHECK); 2080 if (is_protected_access( 2081 _klass, ref_class, method_name(), method_sig(), true)) { 2082 // It's protected access, check if stack object is 2083 // assignable to current class. 2084 bool is_assignable = current_type().is_assignable_from( 2085 stack_object_type, current_class(), CHECK_VERIFY(this)); 2086 if (!is_assignable) { 2087 if (ref_class_type.name() == vmSymbols::java_lang_Object() 2088 && stack_object_type.is_array() 2089 && method_name() == vmSymbols::clone_name()) { 2090 // Special case: arrays pretend to implement public Object 2091 // clone(). 2092 } else { 2093 verify_error(bci, 2094 "Bad access to protected data in invokevirtual"); 2095 return; 2096 } 2097 } 2098 } 2099 } 2100 } 2101 } else { 2102 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); 2103 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); 2104 } 2105 } 2106 } 2107 // Push the result type. 2108 if (sig_stream.type() != T_VOID) { 2109 if (method_name() == vmSymbols::object_initializer_name()) { 2110 // <init> method must have a void return type 2111 verify_error(bci, "Return type must be void in <init> method"); 2112 return; 2113 } 2114 VerificationType return_type[2]; 2115 int n = change_sig_to_verificationType( 2116 &sig_stream, return_type, CHECK_VERIFY(this)); 2117 for (int i = 0; i < n; i++) { 2118 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards 2119 } 2120 } 2121} 2122 2123VerificationType ClassVerifier::get_newarray_type( 2124 u2 index, u2 bci, TRAPS) { 2125 const char* from_bt[] = { 2126 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", 2127 }; 2128 if (index < T_BOOLEAN || index > T_LONG) { 2129 verify_error(bci, "Illegal newarray instruction"); 2130 return VerificationType::bogus_type(); 2131 } 2132 2133 // from_bt[index] contains the array signature which has a length of 2 2134 symbolHandle sig = oopFactory::new_symbol_handle( 2135 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); 2136 return VerificationType::reference_type(sig); 2137} 2138 2139void ClassVerifier::verify_anewarray( 2140 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { 2141 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); 2142 current_frame->pop_stack( 2143 VerificationType::integer_type(), CHECK_VERIFY(this)); 2144 2145 VerificationType component_type = 2146 cp_index_to_type(index, cp, CHECK_VERIFY(this)); 2147 ResourceMark rm(THREAD); 2148 int length; 2149 char* arr_sig_str; 2150 if (component_type.is_array()) { // it's an array 2151 const char* component_name = component_type.name()->as_utf8(); 2152 // add one dimension to component 2153 length = (int)strlen(component_name) + 1; 2154 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); 2155 arr_sig_str[0] = '['; 2156 strncpy(&arr_sig_str[1], component_name, length - 1); 2157 } else { // it's an object or interface 2158 const char* component_name = component_type.name()->as_utf8(); 2159 // add one dimension to component with 'L' prepended and ';' postpended. 2160 length = (int)strlen(component_name) + 3; 2161 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); 2162 arr_sig_str[0] = '['; 2163 arr_sig_str[1] = 'L'; 2164 strncpy(&arr_sig_str[2], component_name, length - 2); 2165 arr_sig_str[length - 1] = ';'; 2166 } 2167 symbolHandle arr_sig = oopFactory::new_symbol_handle( 2168 arr_sig_str, length, CHECK_VERIFY(this)); 2169 VerificationType new_array_type = VerificationType::reference_type(arr_sig); 2170 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); 2171} 2172 2173void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { 2174 current_frame->get_local( 2175 index, VerificationType::integer_type(), CHECK_VERIFY(this)); 2176 current_frame->push_stack( 2177 VerificationType::integer_type(), CHECK_VERIFY(this)); 2178} 2179 2180void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { 2181 current_frame->get_local_2( 2182 index, VerificationType::long_type(), 2183 VerificationType::long2_type(), CHECK_VERIFY(this)); 2184 current_frame->push_stack_2( 2185 VerificationType::long_type(), 2186 VerificationType::long2_type(), CHECK_VERIFY(this)); 2187} 2188 2189void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { 2190 current_frame->get_local( 2191 index, VerificationType::float_type(), CHECK_VERIFY(this)); 2192 current_frame->push_stack( 2193 VerificationType::float_type(), CHECK_VERIFY(this)); 2194} 2195 2196void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { 2197 current_frame->get_local_2( 2198 index, VerificationType::double_type(), 2199 VerificationType::double2_type(), CHECK_VERIFY(this)); 2200 current_frame->push_stack_2( 2201 VerificationType::double_type(), 2202 VerificationType::double2_type(), CHECK_VERIFY(this)); 2203} 2204 2205void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { 2206 VerificationType type = current_frame->get_local( 2207 index, VerificationType::reference_check(), CHECK_VERIFY(this)); 2208 current_frame->push_stack(type, CHECK_VERIFY(this)); 2209} 2210 2211void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { 2212 current_frame->pop_stack( 2213 VerificationType::integer_type(), CHECK_VERIFY(this)); 2214 current_frame->set_local( 2215 index, VerificationType::integer_type(), CHECK_VERIFY(this)); 2216} 2217 2218void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { 2219 current_frame->pop_stack_2( 2220 VerificationType::long2_type(), 2221 VerificationType::long_type(), CHECK_VERIFY(this)); 2222 current_frame->set_local_2( 2223 index, VerificationType::long_type(), 2224 VerificationType::long2_type(), CHECK_VERIFY(this)); 2225} 2226 2227void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { 2228 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); 2229 current_frame->set_local( 2230 index, VerificationType::float_type(), CHECK_VERIFY(this)); 2231} 2232 2233void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { 2234 current_frame->pop_stack_2( 2235 VerificationType::double2_type(), 2236 VerificationType::double_type(), CHECK_VERIFY(this)); 2237 current_frame->set_local_2( 2238 index, VerificationType::double_type(), 2239 VerificationType::double2_type(), CHECK_VERIFY(this)); 2240} 2241 2242void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { 2243 VerificationType type = current_frame->pop_stack( 2244 VerificationType::reference_check(), CHECK_VERIFY(this)); 2245 current_frame->set_local(index, type, CHECK_VERIFY(this)); 2246} 2247 2248void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { 2249 VerificationType type = current_frame->get_local( 2250 index, VerificationType::integer_type(), CHECK_VERIFY(this)); 2251 current_frame->set_local(index, type, CHECK_VERIFY(this)); 2252} 2253 2254void ClassVerifier::verify_return_value( 2255 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { 2256 if (return_type == VerificationType::bogus_type()) { 2257 verify_error(bci, "Method expects a return value"); 2258 return; 2259 } 2260 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); 2261 if (!match) { 2262 verify_error(bci, "Bad return type"); 2263 return; 2264 } 2265} 2266