1 /* 2 * Copyright (c) 1997, 2019, 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 #ifndef SHARE_OOPS_METHOD_HPP 26 #define SHARE_OOPS_METHOD_HPP 27 28 #include "classfile/vmSymbols.hpp" 29 #include "code/compressedStream.hpp" 30 #include "compiler/compilerDefinitions.hpp" 31 #include "compiler/oopMap.hpp" 32 #include "interpreter/invocationCounter.hpp" 33 #include "oops/annotations.hpp" 34 #include "oops/constantPool.hpp" 35 #include "oops/methodCounters.hpp" 36 #include "oops/instanceKlass.hpp" 37 #include "oops/oop.hpp" 38 #include "oops/typeArrayOop.hpp" 39 #include "utilities/accessFlags.hpp" 40 #include "utilities/align.hpp" 41 #include "utilities/growableArray.hpp" 42 #include "utilities/macros.hpp" 43 #if INCLUDE_JFR 44 #include "jfr/support/jfrTraceIdExtension.hpp" 45 #endif 46 47 48 // A Method represents a Java method. 49 // 50 // Note that most applications load thousands of methods, so keeping the size of this 51 // class small has a big impact on footprint. 52 // 53 // Note that native_function and signature_handler have to be at fixed offsets 54 // (required by the interpreter) 55 // 56 // Method embedded field layout (after declared fields): 57 // [EMBEDDED native_function (present only if native) ] 58 // [EMBEDDED signature_handler (present only if native) ] 59 60 class CheckedExceptionElement; 61 class LocalVariableTableElement; 62 class AdapterHandlerEntry; 63 class MethodData; 64 class MethodCounters; 65 class ConstMethod; 66 class InlineTableSizes; 67 class KlassSizeStats; 68 class CompiledMethod; 69 class InterpreterOopMap; 70 71 class Method : public Metadata { 72 friend class VMStructs; 73 friend class JVMCIVMStructs; 74 private: 75 // If you add a new field that points to any metaspace object, you 76 // must add this field to Method::metaspace_pointers_do(). 77 ConstMethod* _constMethod; // Method read-only data. 78 MethodData* _method_data; 79 MethodCounters* _method_counters; 80 AccessFlags _access_flags; // Access flags 81 int _vtable_index; // vtable index of this method (see VtableIndexFlag) 82 // note: can have vtables with >2**16 elements (because of inheritance) 83 u2 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) 84 85 // Flags 86 enum Flags { 87 _caller_sensitive = 1 << 0, 88 _force_inline = 1 << 1, 89 _dont_inline = 1 << 2, 90 _hidden = 1 << 3, 91 _has_injected_profile = 1 << 4, 92 _running_emcp = 1 << 5, 93 _intrinsic_candidate = 1 << 6, 94 _reserved_stack_access = 1 << 7, 95 _scalarized_args = 1 << 8, 96 _c1_needs_stack_repair = 1 << 9, 97 _c2_needs_stack_repair = 1 << 10 98 }; 99 mutable u2 _flags; 100 101 JFR_ONLY(DEFINE_TRACE_FLAG;) 102 103 #ifndef PRODUCT 104 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) 105 #endif 106 // Entry point for calling both from and to the interpreter. 107 address _i2i_entry; // All-args-on-stack calling convention 108 // Entry point for calling from compiled code, to compiled code if it exists 109 // or else the interpreter. 110 volatile address _from_compiled_entry; // Cache of: _code ? _code->verified_entry_point() : _adapter->c2i_entry() 111 volatile address _from_compiled_value_ro_entry; // Cache of: _code ? _code->verified_value_ro_entry_point() : _adapter->c2i_value_ro_entry() 112 volatile address _from_compiled_value_entry; // Cache of: _code ? _code->verified_value_entry_point() : _adapter->c2i_value_entry() 113 // The entry point for calling both from and to compiled code is 114 // "_code->entry_point()". Because of tiered compilation and de-opt, this 115 // field can come and go. It can transition from NULL to not-null at any 116 // time (whenever a compile completes). It can transition from not-null to 117 // NULL only at safepoints (because of a de-opt). 118 CompiledMethod* volatile _code; // Points to the corresponding piece of native code 119 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry 120 int _max_vt_buffer; // max number of VT buffer chunk to use before recycling 121 122 #if INCLUDE_AOT && defined(TIERED) 123 CompiledMethod* _aot_code; 124 #endif 125 126 // Constructor 127 Method(ConstMethod* xconst, AccessFlags access_flags); 128 public: 129 130 static Method* allocate(ClassLoaderData* loader_data, 131 int byte_code_size, 132 AccessFlags access_flags, 133 InlineTableSizes* sizes, 134 ConstMethod::MethodType method_type, 135 TRAPS); 136 137 // CDS and vtbl checking can create an empty Method to get vtbl pointer. 138 Method(){} 139 140 bool is_method() const volatile { return true; } 141 142 void restore_unshareable_info(TRAPS); 143 144 // accessors for instance variables 145 146 ConstMethod* constMethod() const { return _constMethod; } 147 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } 148 149 150 static address make_adapters(const methodHandle& mh, TRAPS); 151 address from_compiled_entry() const; 152 address from_compiled_entry_no_trampoline(bool caller_is_c1) const; 153 address from_interpreted_entry() const; 154 155 // access flag 156 AccessFlags access_flags() const { return _access_flags; } 157 void set_access_flags(AccessFlags flags) { _access_flags = flags; } 158 159 // name 160 Symbol* name() const { return constants()->symbol_at(name_index()); } 161 int name_index() const { return constMethod()->name_index(); } 162 void set_name_index(int index) { constMethod()->set_name_index(index); } 163 164 // signature 165 Symbol* signature() const { return constants()->symbol_at(signature_index()); } 166 int signature_index() const { return constMethod()->signature_index(); } 167 void set_signature_index(int index) { constMethod()->set_signature_index(index); } 168 169 // generics support 170 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } 171 int generic_signature_index() const { return constMethod()->generic_signature_index(); } 172 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } 173 174 // annotations support 175 AnnotationArray* annotations() const { 176 return constMethod()->method_annotations(); 177 } 178 AnnotationArray* parameter_annotations() const { 179 return constMethod()->parameter_annotations(); 180 } 181 AnnotationArray* annotation_default() const { 182 return constMethod()->default_annotations(); 183 } 184 AnnotationArray* type_annotations() const { 185 return constMethod()->type_annotations(); 186 } 187 188 // Helper routine: get klass name + "." + method name + signature as 189 // C string, for the purpose of providing more useful 190 // fatal error handling. The string is allocated in resource 191 // area if a buffer is not provided by the caller. 192 char* name_and_sig_as_C_string() const; 193 char* name_and_sig_as_C_string(char* buf, int size) const; 194 195 // Static routine in the situations we don't have a Method* 196 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); 197 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); 198 199 // Get return type + klass name + "." + method name + ( parameters types ) 200 // as a C string or print it to an outputStream. 201 // This is to be used to assemble strings passed to Java, so that 202 // the text more resembles Java code. Used in exception messages. 203 // Memory is allocated in the resource area; the caller needs 204 // a ResourceMark. 205 const char* external_name() const; 206 void print_external_name(outputStream *os) const; 207 208 static const char* external_name( Klass* klass, Symbol* method_name, Symbol* signature); 209 static void print_external_name(outputStream *os, Klass* klass, Symbol* method_name, Symbol* signature); 210 211 Bytecodes::Code java_code_at(int bci) const { 212 return Bytecodes::java_code_at(this, bcp_from(bci)); 213 } 214 Bytecodes::Code code_at(int bci) const { 215 return Bytecodes::code_at(this, bcp_from(bci)); 216 } 217 218 // JVMTI breakpoints 219 #if !INCLUDE_JVMTI 220 Bytecodes::Code orig_bytecode_at(int bci) const { 221 ShouldNotReachHere(); 222 return Bytecodes::_shouldnotreachhere; 223 } 224 void set_orig_bytecode_at(int bci, Bytecodes::Code code) { 225 ShouldNotReachHere(); 226 }; 227 u2 number_of_breakpoints() const {return 0;} 228 #else // !INCLUDE_JVMTI 229 Bytecodes::Code orig_bytecode_at(int bci) const; 230 void set_orig_bytecode_at(int bci, Bytecodes::Code code); 231 void set_breakpoint(int bci); 232 void clear_breakpoint(int bci); 233 void clear_all_breakpoints(); 234 // Tracking number of breakpoints, for fullspeed debugging. 235 // Only mutated by VM thread. 236 u2 number_of_breakpoints() const { 237 MethodCounters* mcs = method_counters(); 238 if (mcs == NULL) { 239 return 0; 240 } else { 241 return mcs->number_of_breakpoints(); 242 } 243 } 244 void incr_number_of_breakpoints(TRAPS) { 245 MethodCounters* mcs = get_method_counters(CHECK); 246 if (mcs != NULL) { 247 mcs->incr_number_of_breakpoints(); 248 } 249 } 250 void decr_number_of_breakpoints(TRAPS) { 251 MethodCounters* mcs = get_method_counters(CHECK); 252 if (mcs != NULL) { 253 mcs->decr_number_of_breakpoints(); 254 } 255 } 256 // Initialization only 257 void clear_number_of_breakpoints() { 258 MethodCounters* mcs = method_counters(); 259 if (mcs != NULL) { 260 mcs->clear_number_of_breakpoints(); 261 } 262 } 263 #endif // !INCLUDE_JVMTI 264 265 // index into InstanceKlass methods() array 266 // note: also used by jfr 267 u2 method_idnum() const { return constMethod()->method_idnum(); } 268 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } 269 270 u2 orig_method_idnum() const { return constMethod()->orig_method_idnum(); } 271 void set_orig_method_idnum(u2 idnum) { constMethod()->set_orig_method_idnum(idnum); } 272 273 // code size 274 int code_size() const { return constMethod()->code_size(); } 275 276 // method size in words 277 int method_size() const { return sizeof(Method)/wordSize + ( is_native() ? 2 : 0 ); } 278 279 // constant pool for Klass* holding this method 280 ConstantPool* constants() const { return constMethod()->constants(); } 281 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } 282 283 // max stack 284 // return original max stack size for method verification 285 int verifier_max_stack() const { return constMethod()->max_stack(); } 286 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } 287 void set_max_stack(int size) { constMethod()->set_max_stack(size); } 288 289 // max locals 290 int max_locals() const { return constMethod()->max_locals(); } 291 void set_max_locals(int size) { constMethod()->set_max_locals(size); } 292 293 int highest_comp_level() const; 294 void set_highest_comp_level(int level); 295 int highest_osr_comp_level() const; 296 void set_highest_osr_comp_level(int level); 297 298 #if COMPILER2_OR_JVMCI 299 // Count of times method was exited via exception while interpreting 300 void interpreter_throwout_increment(TRAPS) { 301 MethodCounters* mcs = get_method_counters(CHECK); 302 if (mcs != NULL) { 303 mcs->interpreter_throwout_increment(); 304 } 305 } 306 #endif 307 308 int interpreter_throwout_count() const { 309 MethodCounters* mcs = method_counters(); 310 if (mcs == NULL) { 311 return 0; 312 } else { 313 return mcs->interpreter_throwout_count(); 314 } 315 } 316 317 // size of parameters 318 int size_of_parameters() const { return constMethod()->size_of_parameters(); } 319 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } 320 321 bool has_stackmap_table() const { 322 return constMethod()->has_stackmap_table(); 323 } 324 325 Array<u1>* stackmap_data() const { 326 return constMethod()->stackmap_data(); 327 } 328 329 void set_stackmap_data(Array<u1>* sd) { 330 constMethod()->set_stackmap_data(sd); 331 } 332 333 // exception handler table 334 bool has_exception_handler() const 335 { return constMethod()->has_exception_handler(); } 336 int exception_table_length() const 337 { return constMethod()->exception_table_length(); } 338 ExceptionTableElement* exception_table_start() const 339 { return constMethod()->exception_table_start(); } 340 341 // Finds the first entry point bci of an exception handler for an 342 // exception of klass ex_klass thrown at throw_bci. A value of NULL 343 // for ex_klass indicates that the exception klass is not known; in 344 // this case it matches any constraint class. Returns -1 if the 345 // exception cannot be handled in this method. The handler 346 // constraint classes are loaded if necessary. Note that this may 347 // throw an exception if loading of the constraint classes causes 348 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. 349 // If an exception is thrown, returns the bci of the 350 // exception handler which caused the exception to be thrown, which 351 // is needed for proper retries. See, for example, 352 // InterpreterRuntime::exception_handler_for_exception. 353 static int fast_exception_handler_bci_for(const methodHandle& mh, Klass* ex_klass, int throw_bci, TRAPS); 354 355 // method data access 356 MethodData* method_data() const { 357 return _method_data; 358 } 359 360 void set_method_data(MethodData* data); 361 362 MethodCounters* method_counters() const { 363 return _method_counters; 364 } 365 366 void clear_method_counters() { 367 _method_counters = NULL; 368 } 369 370 bool init_method_counters(MethodCounters* counters); 371 372 #ifdef TIERED 373 // We are reusing interpreter_invocation_count as a holder for the previous event count! 374 // We can do that since interpreter_invocation_count is not used in tiered. 375 int prev_event_count() const { 376 if (method_counters() == NULL) { 377 return 0; 378 } else { 379 return method_counters()->interpreter_invocation_count(); 380 } 381 } 382 void set_prev_event_count(int count) { 383 MethodCounters* mcs = method_counters(); 384 if (mcs != NULL) { 385 mcs->set_interpreter_invocation_count(count); 386 } 387 } 388 jlong prev_time() const { 389 MethodCounters* mcs = method_counters(); 390 return mcs == NULL ? 0 : mcs->prev_time(); 391 } 392 void set_prev_time(jlong time) { 393 MethodCounters* mcs = method_counters(); 394 if (mcs != NULL) { 395 mcs->set_prev_time(time); 396 } 397 } 398 float rate() const { 399 MethodCounters* mcs = method_counters(); 400 return mcs == NULL ? 0 : mcs->rate(); 401 } 402 void set_rate(float rate) { 403 MethodCounters* mcs = method_counters(); 404 if (mcs != NULL) { 405 mcs->set_rate(rate); 406 } 407 } 408 409 #if INCLUDE_AOT 410 void set_aot_code(CompiledMethod* aot_code) { 411 _aot_code = aot_code; 412 } 413 414 CompiledMethod* aot_code() const { 415 return _aot_code; 416 } 417 #else 418 CompiledMethod* aot_code() const { return NULL; } 419 #endif // INCLUDE_AOT 420 #endif // TIERED 421 422 int nmethod_age() const { 423 if (method_counters() == NULL) { 424 return INT_MAX; 425 } else { 426 return method_counters()->nmethod_age(); 427 } 428 } 429 430 int invocation_count(); 431 int backedge_count(); 432 433 bool was_executed_more_than(int n); 434 bool was_never_executed() { return !was_executed_more_than(0); } 435 436 static void build_interpreter_method_data(const methodHandle& method, TRAPS); 437 438 static MethodCounters* build_method_counters(Method* m, TRAPS); 439 440 int interpreter_invocation_count() { 441 if (TieredCompilation) { 442 return invocation_count(); 443 } else { 444 MethodCounters* mcs = method_counters(); 445 return (mcs == NULL) ? 0 : mcs->interpreter_invocation_count(); 446 } 447 } 448 #if COMPILER2_OR_JVMCI 449 int increment_interpreter_invocation_count(TRAPS) { 450 if (TieredCompilation) ShouldNotReachHere(); 451 MethodCounters* mcs = get_method_counters(CHECK_0); 452 return (mcs == NULL) ? 0 : mcs->increment_interpreter_invocation_count(); 453 } 454 #endif 455 456 #ifndef PRODUCT 457 int compiled_invocation_count() const { return _compiled_invocation_count; } 458 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } 459 #else 460 // for PrintMethodData in a product build 461 int compiled_invocation_count() const { return 0; } 462 #endif // not PRODUCT 463 464 // Clear (non-shared space) pointers which could not be relevant 465 // if this (shared) method were mapped into another JVM. 466 void remove_unshareable_info(); 467 468 // nmethod/verified compiler entry 469 address verified_code_entry(); 470 address verified_value_code_entry(); 471 address verified_value_ro_code_entry(); 472 bool check_code() const; // Not inline to avoid circular ref 473 CompiledMethod* volatile code() const; 474 475 // Locks CompiledMethod_lock if not held. 476 void unlink_code(CompiledMethod *compare); 477 // Locks CompiledMethod_lock if not held. 478 void unlink_code(); 479 480 private: 481 // Either called with CompiledMethod_lock held or from constructor. 482 void clear_code(); 483 484 public: 485 static void set_code(const methodHandle& mh, CompiledMethod* code); 486 void set_adapter_entry(AdapterHandlerEntry* adapter) { 487 constMethod()->set_adapter_entry(adapter); 488 } 489 void set_adapter_trampoline(AdapterHandlerEntry** trampoline) { 490 constMethod()->set_adapter_trampoline(trampoline); 491 } 492 void update_adapter_trampoline(AdapterHandlerEntry* adapter) { 493 constMethod()->update_adapter_trampoline(adapter); 494 } 495 void set_from_compiled_entry(address entry) { 496 _from_compiled_entry = entry; 497 } 498 499 address get_i2c_entry(); 500 address get_c2i_entry(); 501 address get_c2i_value_entry(); 502 address get_c2i_unverified_entry(); 503 address get_c2i_unverified_value_entry(); 504 AdapterHandlerEntry* adapter() const { 505 return constMethod()->adapter(); 506 } 507 // setup entry points 508 void link_method(const methodHandle& method, TRAPS); 509 // clear entry points. Used by sharing code during dump time 510 void unlink_method() NOT_CDS_RETURN; 511 512 virtual void metaspace_pointers_do(MetaspaceClosure* iter); 513 virtual MetaspaceObj::Type type() const { return MethodType; } 514 515 // vtable index 516 enum VtableIndexFlag { 517 // Valid vtable indexes are non-negative (>= 0). 518 // These few negative values are used as sentinels. 519 itable_index_max = -10, // first itable index, growing downward 520 pending_itable_index = -9, // itable index will be assigned 521 invalid_vtable_index = -4, // distinct from any valid vtable index 522 garbage_vtable_index = -3, // not yet linked; no vtable layout yet 523 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch 524 // 6330203 Note: Do not use -1, which was overloaded with many meanings. 525 }; 526 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) 527 bool has_vtable_index() const { return _vtable_index >= 0; } 528 int vtable_index() const { return _vtable_index; } 529 void set_vtable_index(int index); 530 DEBUG_ONLY(bool valid_itable_index() const { return _vtable_index <= pending_itable_index; }) 531 bool has_itable_index() const { return _vtable_index <= itable_index_max; } 532 int itable_index() const { assert(valid_itable_index(), ""); 533 return itable_index_max - _vtable_index; } 534 void set_itable_index(int index); 535 536 // interpreter entry 537 address interpreter_entry() const { return _i2i_entry; } 538 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry 539 void set_interpreter_entry(address entry) { 540 assert(!is_shared(), 541 "shared method's interpreter entry should not be changed at run time"); 542 if (_i2i_entry != entry) { 543 _i2i_entry = entry; 544 } 545 if (_from_interpreted_entry != entry) { 546 _from_interpreted_entry = entry; 547 } 548 } 549 550 // native function (used for native methods only) 551 enum { 552 native_bind_event_is_interesting = true 553 }; 554 address native_function() const { return *(native_function_addr()); } 555 address critical_native_function(); 556 557 // Must specify a real function (not NULL). 558 // Use clear_native_function() to unregister. 559 void set_native_function(address function, bool post_event_flag); 560 bool has_native_function() const; 561 void clear_native_function(); 562 563 // signature handler (used for native methods only) 564 address signature_handler() const { return *(signature_handler_addr()); } 565 void set_signature_handler(address handler); 566 567 // Interpreter oopmap support 568 void mask_for(int bci, InterpreterOopMap* mask); 569 570 // operations on invocation counter 571 void print_invocation_count(); 572 573 // byte codes 574 void set_code(address code) { return constMethod()->set_code(code); } 575 address code_base() const { return constMethod()->code_base(); } 576 bool contains(address bcp) const { return constMethod()->contains(bcp); } 577 578 // prints byte codes 579 void print_codes() const { print_codes_on(tty); } 580 void print_codes_on(outputStream* st) const; 581 void print_codes_on(int from, int to, outputStream* st) const; 582 583 // method parameters 584 bool has_method_parameters() const 585 { return constMethod()->has_method_parameters(); } 586 int method_parameters_length() const 587 { return constMethod()->method_parameters_length(); } 588 MethodParametersElement* method_parameters_start() const 589 { return constMethod()->method_parameters_start(); } 590 591 // checked exceptions 592 int checked_exceptions_length() const 593 { return constMethod()->checked_exceptions_length(); } 594 CheckedExceptionElement* checked_exceptions_start() const 595 { return constMethod()->checked_exceptions_start(); } 596 597 // localvariable table 598 bool has_localvariable_table() const 599 { return constMethod()->has_localvariable_table(); } 600 int localvariable_table_length() const 601 { return constMethod()->localvariable_table_length(); } 602 LocalVariableTableElement* localvariable_table_start() const 603 { return constMethod()->localvariable_table_start(); } 604 605 bool has_linenumber_table() const 606 { return constMethod()->has_linenumber_table(); } 607 u_char* compressed_linenumber_table() const 608 { return constMethod()->compressed_linenumber_table(); } 609 610 // method holder (the Klass* holding this method) 611 InstanceKlass* method_holder() const { return constants()->pool_holder(); } 612 613 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) 614 Symbol* klass_name() const; // returns the name of the method holder 615 BasicType result_type() const; // type of the method result 616 bool may_return_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY || r == T_VALUETYPE); } 617 #ifdef ASSERT 618 ValueKlass* returned_value_type(Thread* thread) const; 619 #endif 620 621 // Checked exceptions thrown by this method (resolved to mirrors) 622 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } 623 624 // Access flags 625 bool is_public() const { return access_flags().is_public(); } 626 bool is_private() const { return access_flags().is_private(); } 627 bool is_protected() const { return access_flags().is_protected(); } 628 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } 629 bool is_static() const { return access_flags().is_static(); } 630 bool is_final() const { return access_flags().is_final(); } 631 bool is_synchronized() const { return access_flags().is_synchronized();} 632 bool is_native() const { return access_flags().is_native(); } 633 bool is_abstract() const { return access_flags().is_abstract(); } 634 bool is_strict() const { return access_flags().is_strict(); } 635 bool is_synthetic() const { return access_flags().is_synthetic(); } 636 637 // returns true if contains only return operation 638 bool is_empty_method() const; 639 640 // returns true if this is a vanilla constructor 641 bool is_vanilla_constructor() const; 642 643 // checks method and its method holder 644 bool is_final_method() const; 645 bool is_final_method(AccessFlags class_access_flags) const; 646 // interface method declared with 'default' - excludes private interface methods 647 bool is_default_method() const; 648 649 // true if method needs no dynamic dispatch (final and/or no vtable entry) 650 bool can_be_statically_bound() const; 651 bool can_be_statically_bound(InstanceKlass* context) const; 652 bool can_be_statically_bound(AccessFlags class_access_flags) const; 653 654 // returns true if the method has any backward branches. 655 bool has_loops() { 656 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); 657 }; 658 659 bool compute_has_loops_flag(); 660 661 bool has_jsrs() { 662 return access_flags().has_jsrs(); 663 }; 664 void set_has_jsrs() { 665 _access_flags.set_has_jsrs(); 666 } 667 668 // returns true if the method has any monitors. 669 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } 670 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } 671 672 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } 673 674 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes 675 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. 676 // has not been computed yet. 677 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } 678 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } 679 680 // returns true if the method is an accessor function (setter/getter). 681 bool is_accessor() const; 682 683 // returns true if the method is a getter 684 bool is_getter() const; 685 686 // returns true if the method is a setter 687 bool is_setter() const; 688 689 // returns true if the method does nothing but return a constant of primitive type 690 bool is_constant_getter() const; 691 692 // returns true if the method name is <clinit> and the method has 693 // valid static initializer flags. 694 bool is_class_initializer() const; 695 696 // returns true if the method name is <init> and the method is not a static factory 697 bool is_object_constructor() const; 698 699 // returns true if the method is an object constructor or class initializer 700 // (non-static <init> or <clinit>), but false for factories (static <init>). 701 bool is_object_constructor_or_class_initializer() const; 702 703 // returns true if the method name is <init> and the method is static 704 bool is_static_init_factory() const; 705 706 // compiled code support 707 // NOTE: code() is inherently racy as deopt can be clearing code 708 // simultaneously. Use with caution. 709 bool has_compiled_code() const; 710 711 #ifdef TIERED 712 bool has_aot_code() const { return aot_code() != NULL; } 713 #endif 714 715 bool needs_clinit_barrier() const; 716 717 // sizing 718 static int header_size() { 719 return align_up((int)sizeof(Method), wordSize) / wordSize; 720 } 721 static int size(bool is_native); 722 int size() const { return method_size(); } 723 #if INCLUDE_SERVICES 724 void collect_statistics(KlassSizeStats *sz) const; 725 #endif 726 void log_touched(TRAPS); 727 static void print_touched_methods(outputStream* out); 728 729 // interpreter support 730 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } 731 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } 732 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } 733 static ByteSize from_compiled_value_offset() { return byte_offset_of(Method, _from_compiled_value_entry); } 734 static ByteSize from_compiled_value_ro_offset(){ return byte_offset_of(Method, _from_compiled_value_ro_entry); } 735 static ByteSize code_offset() { return byte_offset_of(Method, _code); } 736 static ByteSize flags_offset() { return byte_offset_of(Method, _flags); } 737 static ByteSize method_data_offset() { 738 return byte_offset_of(Method, _method_data); 739 } 740 static ByteSize method_counters_offset() { 741 return byte_offset_of(Method, _method_counters); 742 } 743 #ifndef PRODUCT 744 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } 745 #endif // not PRODUCT 746 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } 747 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } 748 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } 749 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } 750 static ByteSize itable_index_offset() { return byte_offset_of(Method, _vtable_index ); } 751 752 // for code generation 753 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } 754 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } 755 static int intrinsic_id_size_in_bytes() { return sizeof(u2); } 756 757 static ByteSize max_vt_buffer_offset() { return byte_offset_of(Method, _max_vt_buffer); } 758 759 // Static methods that are used to implement member methods where an exposed this pointer 760 // is needed due to possible GCs 761 static objArrayHandle resolved_checked_exceptions_impl(Method* method, TRAPS); 762 763 // Returns the byte code index from the byte code pointer 764 int bci_from(address bcp) const; 765 address bcp_from(int bci) const; 766 address bcp_from(address bcp) const; 767 int validate_bci_from_bcp(address bcp) const; 768 int validate_bci(int bci) const; 769 770 // Returns the line number for a bci if debugging information for the method is prowided, 771 // -1 is returned otherwise. 772 int line_number_from_bci(int bci) const; 773 774 // Reflection support 775 bool is_overridden_in(Klass* k) const; 776 777 // Stack walking support 778 bool is_ignored_by_security_stack_walk() const; 779 780 // JSR 292 support 781 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) 782 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm 783 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. 784 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual 785 Symbol* signature, //anything at all 786 TRAPS); 787 static Klass* check_non_bcp_klass(Klass* klass); 788 789 enum { 790 // How many extra stack entries for invokedynamic 791 extra_stack_entries_for_jsr292 = 1 792 }; 793 794 // this operates only on invoke methods: 795 // presize interpreter frames for extra interpreter stack entries, if needed 796 // Account for the extra appendix argument for invokehandle/invokedynamic 797 static int extra_stack_entries() { return extra_stack_entries_for_jsr292; } 798 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize 799 800 // RedefineClasses() support: 801 bool is_old() const { return access_flags().is_old(); } 802 void set_is_old() { _access_flags.set_is_old(); } 803 bool is_obsolete() const { return access_flags().is_obsolete(); } 804 void set_is_obsolete() { _access_flags.set_is_obsolete(); } 805 bool is_deleted() const { return access_flags().is_deleted(); } 806 void set_is_deleted() { _access_flags.set_is_deleted(); } 807 808 bool is_running_emcp() const { 809 // EMCP methods are old but not obsolete or deleted. Equivalent 810 // Modulo Constant Pool means the method is equivalent except 811 // the constant pool and instructions that access the constant 812 // pool might be different. 813 // If a breakpoint is set in a redefined method, its EMCP methods that are 814 // still running must have a breakpoint also. 815 return (_flags & _running_emcp) != 0; 816 } 817 818 void set_running_emcp(bool x) { 819 _flags = x ? (_flags | _running_emcp) : (_flags & ~_running_emcp); 820 } 821 822 bool on_stack() const { return access_flags().on_stack(); } 823 void set_on_stack(const bool value); 824 825 // see the definition in Method*.cpp for the gory details 826 bool should_not_be_cached() const; 827 828 // JVMTI Native method prefixing support: 829 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } 830 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } 831 832 // Rewriting support 833 static methodHandle clone_with_new_data(const methodHandle& m, u_char* new_code, int new_code_length, 834 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); 835 836 // jmethodID handling 837 // Because the useful life-span of a jmethodID cannot be determined, 838 // once created they are never reclaimed. The methods to which they refer, 839 // however, can be GC'ed away if the class is unloaded or if the method is 840 // made obsolete or deleted -- in these cases, the jmethodID 841 // refers to NULL (as is the case for any weak reference). 842 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); 843 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); 844 845 // Ensure there is enough capacity in the internal tracking data 846 // structures to hold the number of jmethodIDs you plan to generate. 847 // This saves substantial time doing allocations. 848 static void ensure_jmethod_ids(ClassLoaderData* loader_data, int capacity); 849 850 // Use resolve_jmethod_id() in situations where the caller is expected 851 // to provide a valid jmethodID; the only sanity checks are in asserts; 852 // result guaranteed not to be NULL. 853 inline static Method* resolve_jmethod_id(jmethodID mid) { 854 assert(mid != NULL, "JNI method id should not be null"); 855 return *((Method**)mid); 856 } 857 858 // Use checked_resolve_jmethod_id() in situations where the caller 859 // should provide a valid jmethodID, but might not. NULL is returned 860 // when the jmethodID does not refer to a valid method. 861 static Method* checked_resolve_jmethod_id(jmethodID mid); 862 863 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); 864 static bool is_method_id(jmethodID mid); 865 866 // Clear methods 867 static void clear_jmethod_ids(ClassLoaderData* loader_data); 868 static void print_jmethod_ids(const ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; 869 870 // Get this method's jmethodID -- allocate if it doesn't exist 871 jmethodID jmethod_id() { return method_holder()->get_jmethod_id(this); } 872 873 // Lookup the jmethodID for this method. Return NULL if not found. 874 // NOTE that this function can be called from a signal handler 875 // (see AsyncGetCallTrace support for Forte Analyzer) and this 876 // needs to be async-safe. No allocation should be done and 877 // so handles are not used to avoid deadlock. 878 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } 879 880 // Support for inlining of intrinsic methods 881 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } 882 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u2) id; } 883 884 // Helper routines for intrinsic_id() and vmIntrinsics::method(). 885 void init_intrinsic_id(); // updates from _none if a match 886 static vmSymbols::SID klass_id_for_intrinsics(const Klass* holder); 887 888 bool caller_sensitive() { 889 return (_flags & _caller_sensitive) != 0; 890 } 891 void set_caller_sensitive(bool x) { 892 _flags = x ? (_flags | _caller_sensitive) : (_flags & ~_caller_sensitive); 893 } 894 895 bool force_inline() { 896 return (_flags & _force_inline) != 0; 897 } 898 void set_force_inline(bool x) { 899 _flags = x ? (_flags | _force_inline) : (_flags & ~_force_inline); 900 } 901 902 bool dont_inline() { 903 return (_flags & _dont_inline) != 0; 904 } 905 void set_dont_inline(bool x) { 906 _flags = x ? (_flags | _dont_inline) : (_flags & ~_dont_inline); 907 } 908 909 bool is_hidden() { 910 return (_flags & _hidden) != 0; 911 } 912 void set_hidden(bool x) { 913 _flags = x ? (_flags | _hidden) : (_flags & ~_hidden); 914 } 915 916 bool intrinsic_candidate() { 917 return (_flags & _intrinsic_candidate) != 0; 918 } 919 void set_intrinsic_candidate(bool x) { 920 _flags = x ? (_flags | _intrinsic_candidate) : (_flags & ~_intrinsic_candidate); 921 } 922 923 bool has_injected_profile() { 924 return (_flags & _has_injected_profile) != 0; 925 } 926 void set_has_injected_profile(bool x) { 927 _flags = x ? (_flags | _has_injected_profile) : (_flags & ~_has_injected_profile); 928 } 929 930 bool has_reserved_stack_access() { 931 return (_flags & _reserved_stack_access) != 0; 932 } 933 934 void set_has_reserved_stack_access(bool x) { 935 _flags = x ? (_flags | _reserved_stack_access) : (_flags & ~_reserved_stack_access); 936 } 937 938 bool has_scalarized_args() { 939 return (_flags & _scalarized_args) != 0; 940 } 941 942 void set_has_scalarized_args(bool x) { 943 _flags = x ? (_flags | _scalarized_args) : (_flags & ~_scalarized_args); 944 } 945 946 bool c1_needs_stack_repair() { 947 return (_flags & _c1_needs_stack_repair) != 0; 948 } 949 950 bool c2_needs_stack_repair() { 951 return (_flags & _c2_needs_stack_repair) != 0; 952 } 953 954 void set_c1_needs_stack_repair(bool x) { 955 _flags = x ? (_flags | _c1_needs_stack_repair) : (_flags & ~_c1_needs_stack_repair); 956 } 957 958 void set_c2_needs_stack_repair(bool x) { 959 _flags = x ? (_flags | _c2_needs_stack_repair) : (_flags & ~_c2_needs_stack_repair); 960 } 961 962 JFR_ONLY(DEFINE_TRACE_FLAG_ACCESSOR;) 963 964 ConstMethod::MethodType method_type() const { 965 return _constMethod->method_type(); 966 } 967 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } 968 969 // On-stack replacement support 970 bool has_osr_nmethod(int level, bool match_level) { 971 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; 972 } 973 974 int mark_osr_nmethods() { 975 return method_holder()->mark_osr_nmethods(this); 976 } 977 978 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { 979 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); 980 } 981 982 // Find if klass for method is loaded 983 bool is_klass_loaded_by_klass_index(int klass_index) const; 984 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; 985 986 // Indicates whether compilation failed earlier for this method, or 987 // whether it is not compilable for another reason like having a 988 // breakpoint set in it. 989 bool is_not_compilable(int comp_level = CompLevel_any) const; 990 void set_not_compilable(const char* reason, int comp_level = CompLevel_all, bool report = true); 991 void set_not_compilable_quietly(const char* reason, int comp_level = CompLevel_all) { 992 set_not_compilable(reason, comp_level, false); 993 } 994 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; 995 void set_not_osr_compilable(const char* reason, int comp_level = CompLevel_all, bool report = true); 996 void set_not_osr_compilable_quietly(const char* reason, int comp_level = CompLevel_all) { 997 set_not_osr_compilable(reason, comp_level, false); 998 } 999 bool is_always_compilable() const; 1000 1001 private: 1002 void print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason); 1003 1004 public: 1005 MethodCounters* get_method_counters(TRAPS) { 1006 if (_method_counters == NULL) { 1007 build_method_counters(this, CHECK_AND_CLEAR_NULL); 1008 } 1009 return _method_counters; 1010 } 1011 1012 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } 1013 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } 1014 void clear_not_c1_compilable() { _access_flags.clear_not_c1_compilable(); } 1015 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } 1016 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } 1017 void clear_not_c2_compilable() { _access_flags.clear_not_c2_compilable(); } 1018 1019 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit 1020 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit 1021 void clear_not_c1_osr_compilable() { clear_not_c1_compilable(); } // don't waste an accessFlags bit 1022 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } 1023 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } 1024 void clear_not_c2_osr_compilable() { _access_flags.clear_not_c2_osr_compilable(); } 1025 1026 // Background compilation support 1027 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } 1028 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } 1029 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } 1030 1031 // Resolve all classes in signature, return 'true' if successful 1032 static bool load_signature_classes(const methodHandle& m, TRAPS); 1033 1034 // Return if true if not all classes references in signature, including return type, has been loaded 1035 static bool has_unloaded_classes_in_signature(const methodHandle& m, TRAPS); 1036 1037 // Printing 1038 void print_short_name(outputStream* st = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM 1039 #if INCLUDE_JVMTI 1040 void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses 1041 #else 1042 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" 1043 #endif 1044 1045 // Helper routine used for method sorting 1046 static void sort_methods(Array<Method*>* methods, bool set_idnums = true); 1047 1048 // Deallocation function for redefine classes or if an error occurs 1049 void deallocate_contents(ClassLoaderData* loader_data); 1050 1051 Method* get_new_method() const { 1052 InstanceKlass* holder = method_holder(); 1053 Method* new_method = holder->method_with_idnum(orig_method_idnum()); 1054 1055 assert(new_method != NULL, "method_with_idnum() should not be NULL"); 1056 assert(this != new_method, "sanity check"); 1057 return new_method; 1058 } 1059 1060 // Printing 1061 #ifndef PRODUCT 1062 void print_on(outputStream* st) const; 1063 #endif 1064 void print_value_on(outputStream* st) const; 1065 void print_linkage_flags(outputStream* st) PRODUCT_RETURN; 1066 1067 const char* internal_name() const { return "{method}"; } 1068 1069 // Check for valid method pointer 1070 static bool has_method_vptr(const void* ptr); 1071 static bool is_valid_method(const Method* m); 1072 1073 // Verify 1074 void verify() { verify_on(tty); } 1075 void verify_on(outputStream* st); 1076 1077 private: 1078 1079 // Inlined elements 1080 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } 1081 address* signature_handler_addr() const { return native_function_addr() + 1; } 1082 }; 1083 1084 1085 // Utility class for compressing line number tables 1086 1087 class CompressedLineNumberWriteStream: public CompressedWriteStream { 1088 private: 1089 int _bci; 1090 int _line; 1091 public: 1092 // Constructor 1093 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} 1094 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} 1095 1096 // Write (bci, line number) pair to stream 1097 void write_pair_regular(int bci_delta, int line_delta); 1098 1099 // If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) 1100 // we save it as one byte, otherwise we write a 0xFF escape character 1101 // and use regular compression. 0x0 is used as end-of-stream terminator. 1102 void write_pair_inline(int bci, int line); 1103 1104 void write_pair(int bci, int line); 1105 1106 // Write end-of-stream marker 1107 void write_terminator() { write_byte(0); } 1108 }; 1109 1110 1111 // Utility class for decompressing line number tables 1112 1113 class CompressedLineNumberReadStream: public CompressedReadStream { 1114 private: 1115 int _bci; 1116 int _line; 1117 public: 1118 // Constructor 1119 CompressedLineNumberReadStream(u_char* buffer); 1120 // Read (bci, line number) pair from stream. Returns false at end-of-stream. 1121 bool read_pair(); 1122 // Accessing bci and line number (after calling read_pair) 1123 int bci() const { return _bci; } 1124 int line() const { return _line; } 1125 }; 1126 1127 1128 #if INCLUDE_JVMTI 1129 1130 /// Fast Breakpoints. 1131 1132 // If this structure gets more complicated (because bpts get numerous), 1133 // move it into its own header. 1134 1135 // There is presently no provision for concurrent access 1136 // to breakpoint lists, which is only OK for JVMTI because 1137 // breakpoints are written only at safepoints, and are read 1138 // concurrently only outside of safepoints. 1139 1140 class BreakpointInfo : public CHeapObj<mtClass> { 1141 friend class VMStructs; 1142 private: 1143 Bytecodes::Code _orig_bytecode; 1144 int _bci; 1145 u2 _name_index; // of method 1146 u2 _signature_index; // of method 1147 BreakpointInfo* _next; // simple storage allocation 1148 1149 public: 1150 BreakpointInfo(Method* m, int bci); 1151 1152 // accessors 1153 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } 1154 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } 1155 int bci() { return _bci; } 1156 1157 BreakpointInfo* next() const { return _next; } 1158 void set_next(BreakpointInfo* n) { _next = n; } 1159 1160 // helps for searchers 1161 bool match(const Method* m, int bci) { 1162 return bci == _bci && match(m); 1163 } 1164 1165 bool match(const Method* m) { 1166 return _name_index == m->name_index() && 1167 _signature_index == m->signature_index(); 1168 } 1169 1170 void set(Method* method); 1171 void clear(Method* method); 1172 }; 1173 1174 #endif // INCLUDE_JVMTI 1175 1176 // Utility class for access exception handlers 1177 class ExceptionTable : public StackObj { 1178 private: 1179 ExceptionTableElement* _table; 1180 u2 _length; 1181 1182 public: 1183 ExceptionTable(const Method* m) { 1184 if (m->has_exception_handler()) { 1185 _table = m->exception_table_start(); 1186 _length = m->exception_table_length(); 1187 } else { 1188 _table = NULL; 1189 _length = 0; 1190 } 1191 } 1192 1193 int length() const { 1194 return _length; 1195 } 1196 1197 u2 start_pc(int idx) const { 1198 assert(idx < _length, "out of bounds"); 1199 return _table[idx].start_pc; 1200 } 1201 1202 void set_start_pc(int idx, u2 value) { 1203 assert(idx < _length, "out of bounds"); 1204 _table[idx].start_pc = value; 1205 } 1206 1207 u2 end_pc(int idx) const { 1208 assert(idx < _length, "out of bounds"); 1209 return _table[idx].end_pc; 1210 } 1211 1212 void set_end_pc(int idx, u2 value) { 1213 assert(idx < _length, "out of bounds"); 1214 _table[idx].end_pc = value; 1215 } 1216 1217 u2 handler_pc(int idx) const { 1218 assert(idx < _length, "out of bounds"); 1219 return _table[idx].handler_pc; 1220 } 1221 1222 void set_handler_pc(int idx, u2 value) { 1223 assert(idx < _length, "out of bounds"); 1224 _table[idx].handler_pc = value; 1225 } 1226 1227 u2 catch_type_index(int idx) const { 1228 assert(idx < _length, "out of bounds"); 1229 return _table[idx].catch_type_index; 1230 } 1231 1232 void set_catch_type_index(int idx, u2 value) { 1233 assert(idx < _length, "out of bounds"); 1234 _table[idx].catch_type_index = value; 1235 } 1236 }; 1237 1238 #endif // SHARE_OOPS_METHOD_HPP