1 /* 2 * Copyright (c) 2008, 2025, 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 "cds/cds_globals.hpp" 26 #include "classfile/javaClasses.inline.hpp" 27 #include "classfile/stringTable.hpp" 28 #include "classfile/symbolTable.hpp" 29 #include "classfile/systemDictionary.hpp" 30 #include "classfile/systemDictionaryShared.hpp" 31 #include "classfile/vmClasses.hpp" 32 #include "code/codeCache.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "compiler/compileBroker.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "interpreter/oopMapCache.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "jvm_io.h" 39 #include "logging/log.hpp" 40 #include "logging/logStream.hpp" 41 #include "memory/allocation.inline.hpp" 42 #include "memory/oopFactory.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "memory/universe.hpp" 45 #include "oops/klass.inline.hpp" 46 #include "oops/objArrayKlass.hpp" 47 #include "oops/objArrayOop.inline.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/typeArrayOop.inline.hpp" 50 #include "prims/methodHandles.hpp" 51 #include "runtime/deoptimization.hpp" 52 #include "runtime/fieldDescriptor.inline.hpp" 53 #include "runtime/handles.inline.hpp" 54 #include "runtime/interfaceSupport.inline.hpp" 55 #include "runtime/java.hpp" 56 #include "runtime/javaCalls.hpp" 57 #include "runtime/jniHandles.inline.hpp" 58 #include "runtime/perfData.inline.hpp" 59 #include "runtime/timerTrace.hpp" 60 #include "runtime/reflection.hpp" 61 #include "runtime/safepointVerifiers.hpp" 62 #include "runtime/signature.hpp" 63 #include "runtime/stubRoutines.hpp" 64 #include "sanitizers/leak.hpp" 65 #include "services/management.hpp" 66 #include "utilities/exceptions.hpp" 67 68 69 /* 70 * JSR 292 reference implementation: method handles 71 * The JDK 7 reference implementation represented method handle 72 * combinations as chains. Each link in the chain had a "vmentry" 73 * field which pointed at a bit of assembly code which performed 74 * one transformation before dispatching to the next link in the chain. 75 * 76 * The current reference implementation pushes almost all code generation 77 * responsibility to (trusted) Java code. A method handle contains a 78 * pointer to its "LambdaForm", which embodies all details of the method 79 * handle's behavior. The LambdaForm is a normal Java object, managed 80 * by a runtime coded in Java. 81 */ 82 83 bool MethodHandles::_enabled = false; // set true after successful native linkage 84 MethodHandlesAdapterBlob* MethodHandles::_adapter_code = nullptr; 85 86 /** 87 * Generates method handle adapters. Returns 'false' if memory allocation 88 * failed and true otherwise. 89 */ 90 void MethodHandles::generate_adapters() { 91 assert(vmClasses::MethodHandle_klass() != nullptr, "should be present"); 92 assert(_adapter_code == nullptr, "generate only once"); 93 94 ResourceMark rm; 95 TraceTime timer("MethodHandles adapters generation", TRACETIME_LOG(Info, startuptime)); 96 // The adapter entry is required to be aligned to CodeEntryAlignment. 97 // So we need additional bytes due to alignment. 98 int adapter_num = (int)Interpreter::method_handle_invoke_LAST - (int)Interpreter::method_handle_invoke_FIRST + 1; 99 int max_aligned_bytes = adapter_num * CodeEntryAlignment; 100 _adapter_code = MethodHandlesAdapterBlob::create(adapter_code_size + max_aligned_bytes); 101 CodeBuffer code(_adapter_code); 102 MethodHandlesAdapterGenerator g(&code); 103 g.generate(); 104 code.log_section_sizes("MethodHandlesAdapterBlob"); 105 } 106 107 //------------------------------------------------------------------------------ 108 // MethodHandlesAdapterGenerator::generate 109 // 110 void MethodHandlesAdapterGenerator::generate() { 111 // Generate generic method handle adapters. 112 // Generate interpreter entries 113 for (Interpreter::MethodKind mk = Interpreter::method_handle_invoke_FIRST; 114 mk <= Interpreter::method_handle_invoke_LAST; 115 mk = Interpreter::MethodKind(1 + (int)mk)) { 116 vmIntrinsics::ID iid = Interpreter::method_handle_intrinsic(mk); 117 StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid)); 118 address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid); 119 if (entry != nullptr) { 120 Interpreter::set_entry_for_kind(mk, entry); 121 } 122 // If the entry is not set, it will throw AbstractMethodError. 123 } 124 } 125 126 void MethodHandles::set_enabled(bool z) { 127 if (_enabled != z) { 128 guarantee(z, "can only enable once"); 129 _enabled = z; 130 } 131 } 132 133 // MemberName support 134 135 // import java_lang_invoke_MemberName.* 136 enum { 137 IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD, 138 IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR, 139 IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD, 140 IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE, 141 CALLER_SENSITIVE = java_lang_invoke_MemberName::MN_CALLER_SENSITIVE, 142 TRUSTED_FINAL = java_lang_invoke_MemberName::MN_TRUSTED_FINAL, 143 HIDDEN_MEMBER = java_lang_invoke_MemberName::MN_HIDDEN_MEMBER, 144 REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, 145 REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, 146 LM_UNCONDITIONAL = java_lang_invoke_MemberName::MN_UNCONDITIONAL_MODE, 147 LM_MODULE = java_lang_invoke_MemberName::MN_MODULE_MODE, 148 LM_TRUSTED = java_lang_invoke_MemberName::MN_TRUSTED_MODE, 149 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE 150 }; 151 152 int MethodHandles::ref_kind_to_flags(int ref_kind) { 153 assert(ref_kind_is_valid(ref_kind), "%d", ref_kind); 154 int flags = (ref_kind << REFERENCE_KIND_SHIFT); 155 if (ref_kind_is_field(ref_kind)) { 156 flags |= IS_FIELD; 157 } else if (ref_kind_is_method(ref_kind)) { 158 flags |= IS_METHOD; 159 } else if (ref_kind == JVM_REF_newInvokeSpecial) { 160 flags |= IS_CONSTRUCTOR; 161 } 162 return flags; 163 } 164 165 Handle MethodHandles::resolve_MemberName_type(Handle mname, Klass* caller, TRAPS) { 166 Handle empty; 167 Handle type(THREAD, java_lang_invoke_MemberName::type(mname())); 168 if (!java_lang_String::is_instance(type())) { 169 return type; // already resolved 170 } 171 Symbol* signature = java_lang_String::as_symbol_or_null(type()); 172 if (signature == nullptr) { 173 return empty; // no such signature exists in the VM 174 } 175 Handle resolved; 176 int flags = java_lang_invoke_MemberName::flags(mname()); 177 switch (flags & ALL_KINDS) { 178 case IS_METHOD: 179 case IS_CONSTRUCTOR: 180 resolved = SystemDictionary::find_method_handle_type(signature, caller, CHECK_(empty)); 181 break; 182 case IS_FIELD: 183 resolved = SystemDictionary::find_field_handle_type(signature, caller, CHECK_(empty)); 184 break; 185 default: 186 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty); 187 } 188 if (resolved.is_null()) { 189 THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MemberName type", empty); 190 } 191 return resolved; 192 } 193 194 oop MethodHandles::init_MemberName(Handle mname, Handle target, TRAPS) { 195 // This method is used from java.lang.invoke.MemberName constructors. 196 // It fills in the new MemberName from a java.lang.reflect.Member. 197 oop target_oop = target(); 198 Klass* target_klass = target_oop->klass(); 199 if (target_klass == vmClasses::reflect_Field_klass()) { 200 oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() 201 int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() 202 Klass* k = java_lang_Class::as_Klass(clazz); 203 if (k != nullptr && k->is_instance_klass()) { 204 fieldDescriptor fd(InstanceKlass::cast(k), slot); 205 oop mname2 = init_field_MemberName(mname, fd); 206 if (mname2 != nullptr) { 207 // Since we have the reified name and type handy, add them to the result. 208 if (java_lang_invoke_MemberName::name(mname2) == nullptr) 209 java_lang_invoke_MemberName::set_name(mname2, java_lang_reflect_Field::name(target_oop)); 210 if (java_lang_invoke_MemberName::type(mname2) == nullptr) 211 java_lang_invoke_MemberName::set_type(mname2, java_lang_reflect_Field::type(target_oop)); 212 } 213 return mname2; 214 } 215 } else if (target_klass == vmClasses::reflect_Method_klass()) { 216 oop clazz = java_lang_reflect_Method::clazz(target_oop); 217 int slot = java_lang_reflect_Method::slot(target_oop); 218 Klass* k = java_lang_Class::as_Klass(clazz); 219 if (k != nullptr && k->is_instance_klass()) { 220 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 221 if (m == nullptr || is_signature_polymorphic(m->intrinsic_id())) 222 return nullptr; // do not resolve unless there is a concrete signature 223 CallInfo info(m, k, CHECK_NULL); 224 return init_method_MemberName(mname, info); 225 } 226 } else if (target_klass == vmClasses::reflect_Constructor_klass()) { 227 oop clazz = java_lang_reflect_Constructor::clazz(target_oop); 228 int slot = java_lang_reflect_Constructor::slot(target_oop); 229 Klass* k = java_lang_Class::as_Klass(clazz); 230 if (k != nullptr && k->is_instance_klass()) { 231 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 232 if (m == nullptr) return nullptr; 233 CallInfo info(m, k, CHECK_NULL); 234 return init_method_MemberName(mname, info); 235 } 236 } 237 return nullptr; 238 } 239 240 oop MethodHandles::init_method_MemberName(Handle mname, CallInfo& info) { 241 assert(info.resolved_appendix().is_null(), "only normal methods here"); 242 methodHandle m(Thread::current(), info.resolved_method()); 243 assert(m.not_null(), "null method handle"); 244 InstanceKlass* m_klass = m->method_holder(); 245 assert(m_klass != nullptr, "null holder for method handle"); 246 int flags = (m->access_flags().as_method_flags()); 247 int vmindex = Method::invalid_vtable_index; 248 LogTarget(Debug, methodhandles, indy) lt_indy; 249 250 switch (info.call_kind()) { 251 case CallInfo::itable_call: 252 vmindex = info.itable_index(); 253 // More importantly, the itable index only works with the method holder. 254 assert(m_klass->verify_itable_index(vmindex), ""); 255 flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT); 256 if (lt_indy.is_enabled()) { 257 ResourceMark rm; 258 LogStream ls(lt_indy); 259 ls.print_cr("memberName: invokeinterface method_holder::method: %s, itableindex: %d, access_flags:", 260 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()), 261 vmindex); 262 m->access_flags().print_on(&ls); 263 if (!m->is_abstract()) { 264 if (!m->is_private()) { 265 ls.print("default"); 266 } 267 else { 268 ls.print("private-intf"); 269 } 270 } 271 ls.cr(); 272 } 273 break; 274 275 case CallInfo::vtable_call: 276 vmindex = info.vtable_index(); 277 flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); 278 assert(info.resolved_klass()->is_subtype_of(m_klass), "virtual call must be type-safe"); 279 if (m_klass->is_interface()) { 280 // This is a vtable call to an interface method (abstract "miranda method" or default method). 281 // The vtable index is meaningless without a class (not interface) receiver type, so get one. 282 // (LinkResolver should help us figure this out.) 283 assert(info.resolved_klass()->is_instance_klass(), "subtype of interface must be an instance klass"); 284 InstanceKlass* m_klass_non_interface = InstanceKlass::cast(info.resolved_klass()); 285 if (m_klass_non_interface->is_interface()) { 286 m_klass_non_interface = vmClasses::Object_klass(); 287 #ifdef ASSERT 288 { ResourceMark rm; 289 Method* m2 = m_klass_non_interface->vtable().method_at(vmindex); 290 assert(m->name() == m2->name() && m->signature() == m2->signature(), 291 "at %d, %s != %s", vmindex, 292 m->name_and_sig_as_C_string(), m2->name_and_sig_as_C_string()); 293 } 294 #endif //ASSERT 295 } 296 if (!m->is_public()) { 297 assert(m->is_public(), "virtual call must be to public interface method"); 298 return nullptr; // elicit an error later in product build 299 } 300 assert(info.resolved_klass()->is_subtype_of(m_klass_non_interface), "virtual call must be type-safe"); 301 m_klass = m_klass_non_interface; 302 } 303 if (lt_indy.is_enabled()) { 304 ResourceMark rm; 305 LogStream ls(lt_indy); 306 ls.print_cr("memberName: invokevirtual method_holder::method: %s, receiver: %s, vtableindex: %d, access_flags:", 307 Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()), 308 m_klass->internal_name(), vmindex); 309 m->access_flags().print_on(&ls); 310 if (m->is_default_method()) { 311 ls.print("default"); 312 } 313 ls.cr(); 314 } 315 break; 316 317 case CallInfo::direct_call: 318 vmindex = Method::nonvirtual_vtable_index; 319 if (m->is_static()) { 320 assert(!m->is_static_initializer(), "Cannot be static initializer"); 321 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT); 322 } else if (m->is_object_initializer()) { 323 flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); 324 } else { 325 // "special" reflects that this is a direct call, not that it 326 // necessarily originates from an invokespecial. We can also do 327 // direct calls for private and/or final non-static methods. 328 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); 329 } 330 break; 331 332 default: assert(false, "bad CallInfo"); return nullptr; 333 } 334 335 // @CallerSensitive annotation detected 336 if (m->caller_sensitive()) { 337 flags |= CALLER_SENSITIVE; 338 } 339 340 Handle resolved_method = info.resolved_method_name(); 341 assert(java_lang_invoke_ResolvedMethodName::vmtarget(resolved_method()) == m() || m->is_old(), 342 "Should not change after link resolution"); 343 344 oop mname_oop = mname(); 345 java_lang_invoke_MemberName::set_flags (mname_oop, flags); 346 java_lang_invoke_MemberName::set_method (mname_oop, resolved_method()); 347 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); // vtable/itable index 348 java_lang_invoke_MemberName::set_clazz (mname_oop, m_klass->java_mirror()); 349 // Note: name and type can be lazily computed by resolve_MemberName, 350 // if Java code needs them as resolved String and MethodType objects. 351 // If relevant, the vtable or itable value is stored as vmindex. 352 // This is done eagerly, since it is readily available without 353 // constructing any new objects. 354 return mname(); 355 } 356 357 oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) { 358 InstanceKlass* ik = fd.field_holder(); 359 int flags = fd.access_flags().as_field_flags(); 360 flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT); 361 if (fd.is_trusted_final()) flags |= TRUSTED_FINAL; 362 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT); 363 int vmindex = fd.offset(); // determines the field uniquely when combined with static bit 364 365 oop mname_oop = mname(); 366 java_lang_invoke_MemberName::set_flags (mname_oop, flags); 367 java_lang_invoke_MemberName::set_method (mname_oop, nullptr); 368 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); 369 java_lang_invoke_MemberName::set_clazz (mname_oop, ik->java_mirror()); 370 371 oop type = field_signature_type_or_null(fd.signature()); 372 oop name = field_name_or_null(fd.name()); 373 if (name != nullptr) 374 java_lang_invoke_MemberName::set_name(mname_oop, name); 375 if (type != nullptr) 376 java_lang_invoke_MemberName::set_type(mname_oop, type); 377 // Note: name and type can be lazily computed by resolve_MemberName, 378 // if Java code needs them as resolved String and Class objects. 379 // Note that the incoming type oop might be pre-resolved (non-null). 380 // The base clazz and field offset (vmindex) must be eagerly stored, 381 // because they unambiguously identify the field. 382 // Although the fieldDescriptor::_index would also identify the field, 383 // we do not use it, because it is harder to decode. 384 // TO DO: maybe intern mname_oop 385 return mname(); 386 } 387 388 // JVM 2.9 Special Methods: 389 // A method is signature polymorphic if and only if all of the following conditions hold : 390 // * It is declared in the java.lang.invoke.MethodHandle/VarHandle classes. 391 // * It has a single formal parameter of type Object[]. 392 // * It has a return type of Object for a polymorphic return type, otherwise a fixed return type. 393 // * It has the ACC_VARARGS and ACC_NATIVE flags set. 394 bool MethodHandles::is_method_handle_invoke_name(Klass* klass, Symbol* name) { 395 if (klass == nullptr) 396 return false; 397 // The following test will fail spuriously during bootstrap of MethodHandle itself: 398 // if (klass != vmClasses::MethodHandle_klass()) 399 // Test the name instead: 400 if (klass->name() != vmSymbols::java_lang_invoke_MethodHandle() && 401 klass->name() != vmSymbols::java_lang_invoke_VarHandle()) { 402 return false; 403 } 404 405 // Look up signature polymorphic method with polymorphic return type 406 Symbol* poly_sig = vmSymbols::object_array_object_signature(); 407 InstanceKlass* iklass = InstanceKlass::cast(klass); 408 Method* m = iklass->find_method(name, poly_sig); 409 if (m != nullptr) { 410 int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS; 411 int flags = m->access_flags().as_method_flags(); 412 if ((flags & required) == required) { 413 return true; 414 } 415 } 416 417 // Look up signature polymorphic method with non-polymorphic (non Object) return type 418 int me; 419 int ms = iklass->find_method_by_name(name, &me); 420 if (ms == -1) return false; 421 for (; ms < me; ms++) { 422 Method* m = iklass->methods()->at(ms); 423 int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS; 424 int flags = m->access_flags().as_method_flags(); 425 if ((flags & required) == required && ArgumentCount(m->signature()).size() == 1) { 426 return true; 427 } 428 } 429 return false; 430 } 431 432 433 Symbol* MethodHandles::signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid) { 434 assert(is_signature_polymorphic_intrinsic(iid), "%d %s", vmIntrinsics::as_int(iid), vmIntrinsics::name_at(iid)); 435 switch (iid) { 436 case vmIntrinsics::_invokeBasic: return vmSymbols::invokeBasic_name(); 437 case vmIntrinsics::_linkToVirtual: return vmSymbols::linkToVirtual_name(); 438 case vmIntrinsics::_linkToStatic: return vmSymbols::linkToStatic_name(); 439 case vmIntrinsics::_linkToSpecial: return vmSymbols::linkToSpecial_name(); 440 case vmIntrinsics::_linkToInterface: return vmSymbols::linkToInterface_name(); 441 case vmIntrinsics::_linkToNative: return vmSymbols::linkToNative_name(); 442 default: 443 fatal("unexpected intrinsic id: %d %s", vmIntrinsics::as_int(iid), vmIntrinsics::name_at(iid)); 444 } 445 } 446 447 Bytecodes::Code MethodHandles::signature_polymorphic_intrinsic_bytecode(vmIntrinsics::ID id) { 448 switch(id) { 449 case vmIntrinsics::_linkToVirtual: return Bytecodes::_invokevirtual; 450 case vmIntrinsics::_linkToInterface: return Bytecodes::_invokeinterface; 451 case vmIntrinsics::_linkToStatic: return Bytecodes::_invokestatic; 452 case vmIntrinsics::_linkToSpecial: return Bytecodes::_invokespecial; 453 case vmIntrinsics::_invokeBasic: return Bytecodes::_invokehandle; 454 default: 455 fatal("unexpected id: (%d) %s", (uint)id, vmIntrinsics::name_at(id)); 456 } 457 } 458 459 int MethodHandles::signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid) { 460 switch (iid) { 461 case vmIntrinsics::_invokeBasic: return 0; 462 case vmIntrinsics::_linkToNative: return 0; 463 case vmIntrinsics::_linkToVirtual: return JVM_REF_invokeVirtual; 464 case vmIntrinsics::_linkToStatic: return JVM_REF_invokeStatic; 465 case vmIntrinsics::_linkToSpecial: return JVM_REF_invokeSpecial; 466 case vmIntrinsics::_linkToInterface: return JVM_REF_invokeInterface; 467 default: 468 fatal("unexpected intrinsic id: %d %s", vmIntrinsics::as_int(iid), vmIntrinsics::name_at(iid)); 469 } 470 } 471 472 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Symbol* name) { 473 vmSymbolID name_id = vmSymbols::find_sid(name); 474 switch (name_id) { 475 // The ID _invokeGeneric stands for all non-static signature-polymorphic methods, except built-ins. 476 case VM_SYMBOL_ENUM_NAME(invoke_name): return vmIntrinsics::_invokeGeneric; 477 // The only built-in non-static signature-polymorphic method is MethodHandle.invokeBasic: 478 case VM_SYMBOL_ENUM_NAME(invokeBasic_name): return vmIntrinsics::_invokeBasic; 479 480 // There is one static signature-polymorphic method for each JVM invocation mode. 481 case VM_SYMBOL_ENUM_NAME(linkToVirtual_name): return vmIntrinsics::_linkToVirtual; 482 case VM_SYMBOL_ENUM_NAME(linkToStatic_name): return vmIntrinsics::_linkToStatic; 483 case VM_SYMBOL_ENUM_NAME(linkToSpecial_name): return vmIntrinsics::_linkToSpecial; 484 case VM_SYMBOL_ENUM_NAME(linkToInterface_name): return vmIntrinsics::_linkToInterface; 485 case VM_SYMBOL_ENUM_NAME(linkToNative_name): return vmIntrinsics::_linkToNative; 486 default: break; 487 } 488 489 // Cover the case of invokeExact and any future variants of invokeFoo. 490 Klass* mh_klass = vmClasses::klass_at(VM_CLASS_ID(MethodHandle_klass)); 491 if (mh_klass != nullptr && is_method_handle_invoke_name(mh_klass, name)) { 492 return vmIntrinsics::_invokeGeneric; 493 } 494 495 // Cover the case of methods on VarHandle. 496 Klass* vh_klass = vmClasses::klass_at(VM_CLASS_ID(VarHandle_klass)); 497 if (vh_klass != nullptr && is_method_handle_invoke_name(vh_klass, name)) { 498 return vmIntrinsics::_invokeGeneric; 499 } 500 501 // Note: The pseudo-intrinsic _compiledLambdaForm is never linked against. 502 // Instead it is used to mark lambda forms bound to invokehandle or invokedynamic. 503 return vmIntrinsics::_none; 504 } 505 506 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Klass* klass, Symbol* name) { 507 if (klass != nullptr && 508 (klass->name() == vmSymbols::java_lang_invoke_MethodHandle() || 509 klass->name() == vmSymbols::java_lang_invoke_VarHandle())) { 510 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); 511 if (iid != vmIntrinsics::_none) 512 return iid; 513 if (is_method_handle_invoke_name(klass, name)) 514 return vmIntrinsics::_invokeGeneric; 515 } 516 return vmIntrinsics::_none; 517 } 518 519 // Returns true if method is signature polymorphic and public 520 bool MethodHandles::is_signature_polymorphic_public_name(Klass* klass, Symbol* name) { 521 if (is_signature_polymorphic_name(klass, name)) { 522 InstanceKlass* iklass = InstanceKlass::cast(klass); 523 int me; 524 int ms = iklass->find_method_by_name(name, &me); 525 assert(ms != -1, ""); 526 for (; ms < me; ms++) { 527 Method* m = iklass->methods()->at(ms); 528 int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS | JVM_ACC_PUBLIC; 529 int flags = m->access_flags().as_method_flags(); 530 if ((flags & required) == required && ArgumentCount(m->signature()).size() == 1) { 531 return true; 532 } 533 } 534 } 535 return false; 536 } 537 538 // convert the external string or reflective type to an internal signature 539 Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) { 540 if (java_lang_invoke_MethodType::is_instance(type_str)) { 541 return java_lang_invoke_MethodType::as_signature(type_str, intern_if_not_found); 542 } else if (java_lang_Class::is_instance(type_str)) { 543 return java_lang_Class::as_signature(type_str, false); 544 } else if (java_lang_String::is_instance(type_str)) { 545 if (intern_if_not_found) { 546 return java_lang_String::as_symbol(type_str); 547 } else { 548 return java_lang_String::as_symbol_or_null(type_str); 549 } 550 } else { 551 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", nullptr); 552 } 553 } 554 555 static const char OBJ_SIG[] = "Ljava/lang/Object;"; 556 enum { OBJ_SIG_LEN = 18 }; 557 558 bool MethodHandles::is_basic_type_signature(Symbol* sig) { 559 assert(vmSymbols::object_signature()->utf8_length() == (int)OBJ_SIG_LEN, ""); 560 assert(vmSymbols::object_signature()->equals(OBJ_SIG), ""); 561 for (SignatureStream ss(sig, sig->starts_with(JVM_SIGNATURE_FUNC)); !ss.is_done(); ss.next()) { 562 switch (ss.type()) { 563 case T_OBJECT: 564 // only java/lang/Object is valid here 565 if (strncmp((char*) ss.raw_bytes(), OBJ_SIG, OBJ_SIG_LEN) != 0) 566 return false; 567 break; 568 case T_VOID: 569 case T_INT: 570 case T_LONG: 571 case T_FLOAT: 572 case T_DOUBLE: 573 break; 574 default: 575 // subword types (T_BYTE etc.), Q-descriptors, arrays 576 return false; 577 } 578 } 579 return true; 580 } 581 582 Symbol* MethodHandles::lookup_basic_type_signature(Symbol* sig, bool keep_last_arg) { 583 Symbol* bsig = nullptr; 584 if (sig == nullptr) { 585 return sig; 586 } else if (is_basic_type_signature(sig)) { 587 sig->increment_refcount(); 588 return sig; // that was easy 589 } else if (!sig->starts_with(JVM_SIGNATURE_FUNC)) { 590 BasicType bt = Signature::basic_type(sig); 591 if (is_subword_type(bt)) { 592 bsig = vmSymbols::int_signature(); 593 } else { 594 assert(is_reference_type(bt), "is_basic_type_signature was false"); 595 bsig = vmSymbols::object_signature(); 596 } 597 } else { 598 ResourceMark rm; 599 stringStream buffer(128); 600 buffer.put(JVM_SIGNATURE_FUNC); 601 int arg_pos = 0, keep_arg_pos = -1; 602 if (keep_last_arg) 603 keep_arg_pos = ArgumentCount(sig).size() - 1; 604 for (SignatureStream ss(sig); !ss.is_done(); ss.next()) { 605 BasicType bt = ss.type(); 606 size_t this_arg_pos = buffer.size(); 607 if (ss.at_return_type()) { 608 buffer.put(JVM_SIGNATURE_ENDFUNC); 609 } 610 if (arg_pos == keep_arg_pos) { 611 buffer.write((char*) ss.raw_bytes(), 612 (int) ss.raw_length()); 613 } else if (is_reference_type(bt)) { 614 buffer.write(OBJ_SIG, OBJ_SIG_LEN); 615 } else { 616 if (is_subword_type(bt)) 617 bt = T_INT; 618 buffer.put(type2char(bt)); 619 } 620 arg_pos++; 621 } 622 const char* sigstr = buffer.base(); 623 int siglen = (int) buffer.size(); 624 bsig = SymbolTable::new_symbol(sigstr, siglen); 625 } 626 assert(is_basic_type_signature(bsig) || 627 // detune assert in case the injected argument is not a basic type: 628 keep_last_arg, ""); 629 return bsig; 630 } 631 632 void MethodHandles::print_as_basic_type_signature_on(outputStream* st, 633 Symbol* sig) { 634 st = st ? st : tty; 635 bool prev_type = false; 636 bool is_method = (sig->char_at(0) == JVM_SIGNATURE_FUNC); 637 if (is_method) st->put(JVM_SIGNATURE_FUNC); 638 for (SignatureStream ss(sig, is_method); !ss.is_done(); ss.next()) { 639 if (ss.at_return_type()) 640 st->put(JVM_SIGNATURE_ENDFUNC); 641 else if (prev_type) 642 st->put(','); 643 const char* cp = (const char*) ss.raw_bytes(); 644 if (ss.is_array()) { 645 st->put(JVM_SIGNATURE_ARRAY); 646 if (ss.array_prefix_length() == 1) 647 st->put(cp[1]); 648 else 649 st->put(JVM_SIGNATURE_CLASS); 650 } else { 651 st->put(cp[0]); 652 } 653 } 654 } 655 656 657 658 static oop object_java_mirror() { 659 return vmClasses::Object_klass()->java_mirror(); 660 } 661 662 oop MethodHandles::field_name_or_null(Symbol* s) { 663 if (s == nullptr) return nullptr; 664 return StringTable::lookup(s); 665 } 666 667 oop MethodHandles::field_signature_type_or_null(Symbol* s) { 668 if (s == nullptr) return nullptr; 669 BasicType bt = Signature::basic_type(s); 670 if (is_java_primitive(bt)) { 671 assert(s->utf8_length() == 1, ""); 672 return java_lang_Class::primitive_mirror(bt); 673 } 674 // Here are some more short cuts for common types. 675 // They are optional, since reference types can be resolved lazily. 676 if (bt == T_OBJECT) { 677 if (s == vmSymbols::object_signature()) { 678 return object_java_mirror(); 679 } else if (s == vmSymbols::class_signature()) { 680 return vmClasses::Class_klass()->java_mirror(); 681 } else if (s == vmSymbols::string_signature()) { 682 return vmClasses::String_klass()->java_mirror(); 683 } 684 } 685 return nullptr; 686 } 687 688 // An unresolved member name is a mere symbolic reference. 689 // Resolving it plants a vmtarget/vmindex in it, 690 // which refers directly to JVM internals. 691 Handle MethodHandles::resolve_MemberName(Handle mname, Klass* caller, int lookup_mode, 692 bool speculative_resolve, TRAPS) { 693 Handle empty; 694 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); 695 696 if (java_lang_invoke_MemberName::vmtarget(mname()) != nullptr) { 697 // Already resolved. 698 DEBUG_ONLY(intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname())); 699 assert(vmindex >= Method::nonvirtual_vtable_index, ""); 700 return mname; 701 } 702 703 Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); 704 Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); 705 Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); 706 int flags = java_lang_invoke_MemberName::flags(mname()); 707 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; 708 if (!ref_kind_is_valid(ref_kind)) { 709 THROW_MSG_(vmSymbols::java_lang_InternalError(), "obsolete MemberName format", empty); 710 } 711 712 DEBUG_ONLY(intptr_t old_vmindex); 713 assert((old_vmindex = java_lang_invoke_MemberName::vmindex(mname())) == 0, "clean input"); 714 715 if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { 716 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve", empty); 717 } 718 719 InstanceKlass* defc = nullptr; 720 { 721 Klass* defc_klass = java_lang_Class::as_Klass(defc_oop()); 722 if (defc_klass == nullptr) return empty; // a primitive; no resolution possible 723 if (!defc_klass->is_instance_klass()) { 724 if (!defc_klass->is_array_klass()) return empty; 725 defc_klass = vmClasses::Object_klass(); 726 } 727 defc = InstanceKlass::cast(defc_klass); 728 } 729 if (defc == nullptr) { 730 THROW_MSG_(vmSymbols::java_lang_InternalError(), "primitive class", empty); 731 } 732 defc->link_class(CHECK_(empty)); // possible safepoint 733 734 // convert the external string name to an internal symbol 735 TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); 736 if (name == nullptr) return empty; // no such name 737 if (name == vmSymbols::class_initializer_name()) 738 return empty; // illegal name 739 740 vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none; 741 if ((flags & ALL_KINDS) == IS_METHOD && 742 (defc == vmClasses::MethodHandle_klass() || defc == vmClasses::VarHandle_klass()) && 743 (ref_kind == JVM_REF_invokeVirtual || 744 ref_kind == JVM_REF_invokeSpecial || 745 // static invocation mode is required for _linkToVirtual, etc.: 746 ref_kind == JVM_REF_invokeStatic)) { 747 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); 748 if (iid != vmIntrinsics::_none && 749 ((ref_kind == JVM_REF_invokeStatic) == is_signature_polymorphic_static(iid))) { 750 // Virtual methods invoke and invokeExact, plus internal invokers like _invokeBasic. 751 // For a static reference it could an internal linkage routine like _linkToVirtual, etc. 752 mh_invoke_id = iid; 753 } 754 } 755 756 // convert the external string or reflective type to an internal signature 757 TempNewSymbol type = lookup_signature(type_str(), (mh_invoke_id != vmIntrinsics::_none), CHECK_(empty)); 758 if (type == nullptr) return empty; // no such signature exists in the VM 759 760 // skip access check if it's trusted lookup 761 LinkInfo::AccessCheck access_check = caller != nullptr ? 762 LinkInfo::AccessCheck::required : 763 LinkInfo::AccessCheck::skip; 764 // skip loader constraints if it's trusted lookup or a public lookup 765 LinkInfo::LoaderConstraintCheck loader_constraint_check = (caller != nullptr && (lookup_mode & LM_UNCONDITIONAL) == 0) ? 766 LinkInfo::LoaderConstraintCheck::required : 767 LinkInfo::LoaderConstraintCheck::skip; 768 769 // Time to do the lookup. 770 switch (flags & ALL_KINDS) { 771 case IS_METHOD: 772 { 773 CallInfo result; 774 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check); 775 { 776 assert(!HAS_PENDING_EXCEPTION, ""); 777 if (ref_kind == JVM_REF_invokeStatic) { 778 LinkResolver::resolve_static_call(result, 779 link_info, false, THREAD); 780 } else if (ref_kind == JVM_REF_invokeInterface) { 781 LinkResolver::resolve_interface_call(result, Handle(), defc, 782 link_info, false, THREAD); 783 } else if (mh_invoke_id != vmIntrinsics::_none) { 784 assert(!is_signature_polymorphic_static(mh_invoke_id), ""); 785 LinkResolver::resolve_handle_call(result, link_info, THREAD); 786 } else if (ref_kind == JVM_REF_invokeSpecial) { 787 LinkResolver::resolve_special_call(result, Handle(), 788 link_info, THREAD); 789 } else if (ref_kind == JVM_REF_invokeVirtual) { 790 LinkResolver::resolve_virtual_call(result, Handle(), defc, 791 link_info, false, THREAD); 792 } else { 793 assert(false, "ref_kind=%d", ref_kind); 794 } 795 if (HAS_PENDING_EXCEPTION) { 796 if (speculative_resolve) { 797 CLEAR_PENDING_EXCEPTION; 798 } 799 return empty; 800 } 801 } 802 if (result.resolved_appendix().not_null()) { 803 // The resolved MemberName must not be accompanied by an appendix argument, 804 // since there is no way to bind this value into the MemberName. 805 // Caller is responsible to prevent this from happening. 806 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty); 807 } 808 result.set_resolved_method_name(CHECK_(empty)); 809 oop mname2 = init_method_MemberName(mname, result); 810 return Handle(THREAD, mname2); 811 } 812 case IS_CONSTRUCTOR: 813 { 814 CallInfo result; 815 LinkInfo link_info(defc, name, type, caller, access_check, loader_constraint_check); 816 { 817 assert(!HAS_PENDING_EXCEPTION, ""); 818 if (name == vmSymbols::object_initializer_name()) { 819 LinkResolver::resolve_special_call(result, Handle(), link_info, THREAD); 820 } else { 821 break; // will throw after end of switch 822 } 823 if (HAS_PENDING_EXCEPTION) { 824 if (speculative_resolve) { 825 CLEAR_PENDING_EXCEPTION; 826 } 827 return empty; 828 } 829 } 830 assert(result.is_statically_bound(), ""); 831 result.set_resolved_method_name(CHECK_(empty)); 832 oop mname2 = init_method_MemberName(mname, result); 833 return Handle(THREAD, mname2); 834 } 835 case IS_FIELD: 836 { 837 fieldDescriptor result; // find_field initializes fd if found 838 { 839 assert(!HAS_PENDING_EXCEPTION, ""); 840 LinkInfo link_info(defc, name, type, caller, LinkInfo::AccessCheck::skip, loader_constraint_check); 841 LinkResolver::resolve_field(result, link_info, Bytecodes::_nop, false, THREAD); 842 if (HAS_PENDING_EXCEPTION) { 843 if (speculative_resolve) { 844 CLEAR_PENDING_EXCEPTION; 845 } 846 return empty; 847 } 848 } 849 oop mname2 = init_field_MemberName(mname, result, ref_kind_is_setter(ref_kind)); 850 return Handle(THREAD, mname2); 851 } 852 default: 853 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty); 854 } 855 856 return empty; 857 } 858 859 // Conversely, a member name which is only initialized from JVM internals 860 // may have null defc, name, and type fields. 861 // Resolving it plants a vmtarget/vmindex in it, 862 // which refers directly to JVM internals. 863 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { 864 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); 865 866 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != nullptr); 867 bool have_name = (java_lang_invoke_MemberName::name(mname()) != nullptr); 868 bool have_type = (java_lang_invoke_MemberName::type(mname()) != nullptr); 869 int flags = java_lang_invoke_MemberName::flags(mname()); 870 871 if (suppress != 0) { 872 if (suppress & _suppress_defc) have_defc = true; 873 if (suppress & _suppress_name) have_name = true; 874 if (suppress & _suppress_type) have_type = true; 875 } 876 877 if (have_defc && have_name && have_type) return; // nothing needed 878 879 switch (flags & ALL_KINDS) { 880 case IS_METHOD: 881 case IS_CONSTRUCTOR: 882 { 883 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); 884 if (vmtarget == nullptr) { 885 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); 886 } 887 methodHandle m(THREAD, vmtarget); 888 DEBUG_ONLY(vmtarget = nullptr); // safety 889 if (!have_defc) { 890 InstanceKlass* defc = m->method_holder(); 891 java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); 892 } 893 if (!have_name) { 894 //not java_lang_String::create_from_symbol; let's intern member names 895 oop name = StringTable::intern(m->name(), CHECK); 896 java_lang_invoke_MemberName::set_name(mname(), name); 897 } 898 if (!have_type) { 899 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK); 900 java_lang_invoke_MemberName::set_type(mname(), type()); 901 } 902 return; 903 } 904 case IS_FIELD: 905 { 906 oop clazz = java_lang_invoke_MemberName::clazz(mname()); 907 if (clazz == nullptr) { 908 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand (as field)"); 909 } 910 InstanceKlass* defc = InstanceKlass::cast(java_lang_Class::as_Klass(clazz)); 911 DEBUG_ONLY(clazz = nullptr); // safety 912 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname()); 913 bool is_static = ((flags & JVM_ACC_STATIC) != 0); 914 fieldDescriptor fd; // find_field initializes fd if found 915 if (!defc->find_field_from_offset(checked_cast<int>(vmindex), is_static, &fd)) 916 break; // cannot expand 917 if (!have_name) { 918 //not java_lang_String::create_from_symbol; let's intern member names 919 oop name = StringTable::intern(fd.name(), CHECK); 920 java_lang_invoke_MemberName::set_name(mname(), name); 921 } 922 if (!have_type) { 923 // If it is a primitive field type, don't mess with short strings like "I". 924 Handle type (THREAD, field_signature_type_or_null(fd.signature())); 925 if (type.is_null()) { 926 type = java_lang_String::create_from_symbol(fd.signature(), CHECK); 927 } 928 java_lang_invoke_MemberName::set_type(mname(), type()); 929 } 930 return; 931 } 932 } 933 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); 934 } 935 936 void MethodHandles::add_dependent_nmethod(oop call_site, nmethod* nm) { 937 assert_lock_strong(CodeCache_lock); 938 DependencyContext deps = java_lang_invoke_CallSite::vmdependencies(call_site); 939 deps.add_dependent_nmethod(nm); 940 } 941 942 void MethodHandles::clean_dependency_context(oop call_site) { 943 DependencyContext deps = java_lang_invoke_CallSite::vmdependencies(call_site); 944 deps.clean_unloading_dependents(); 945 } 946 947 void MethodHandles::mark_dependent_nmethods(DeoptimizationScope* deopt_scope, Handle call_site, Handle target) { 948 assert_lock_strong(Compile_lock); 949 950 CallSiteDepChange changes(call_site, target); 951 { 952 NoSafepointVerifier nsv; 953 MutexLocker ml(CodeCache_lock, Mutex::_no_safepoint_check_flag); 954 955 DependencyContext deps = java_lang_invoke_CallSite::vmdependencies(call_site()); 956 deps.mark_dependent_nmethods(deopt_scope, changes); 957 } 958 } 959 960 void MethodHandles::trace_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid) { 961 if (log_is_enabled(Info, methodhandles)) { 962 const char* name = vmIntrinsics::name_at(iid); 963 if (*name == '_') name += 1; 964 const size_t len = strlen(name) + 50; 965 char* qname = NEW_C_HEAP_ARRAY(char, len, mtInternal); 966 const char* suffix = ""; 967 if (is_signature_polymorphic(iid)) { 968 if (is_signature_polymorphic_static(iid)) 969 suffix = "/static"; 970 else 971 suffix = "/private"; 972 } 973 jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix); 974 trace_method_handle(_masm, qname); 975 // LSan appears unable to keep track of qname, ignore it. 976 LSAN_IGNORE_OBJECT(qname); 977 // Note: Don't free the allocated char array because it's used 978 // during runtime. 979 } 980 } 981 982 // 983 // Here are the native methods in java.lang.invoke.MethodHandleNatives 984 // They are the private interface between this JVM and the HotSpot-specific 985 // Java code that implements JSR 292 method handles. 986 // 987 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way 988 // that intrinsic (non-JNI) native methods are defined in HotSpot. 989 // 990 991 #ifndef PRODUCT 992 #define EACH_NAMED_CON(template, requirement) \ 993 template(java_lang_invoke_MemberName,MN_IS_METHOD) \ 994 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ 995 template(java_lang_invoke_MemberName,MN_IS_FIELD) \ 996 template(java_lang_invoke_MemberName,MN_IS_TYPE) \ 997 template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \ 998 template(java_lang_invoke_MemberName,MN_TRUSTED_FINAL) \ 999 template(java_lang_invoke_MemberName,MN_HIDDEN_MEMBER) \ 1000 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \ 1001 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \ 1002 template(java_lang_invoke_MemberName,MN_NESTMATE_CLASS) \ 1003 template(java_lang_invoke_MemberName,MN_HIDDEN_CLASS) \ 1004 template(java_lang_invoke_MemberName,MN_STRONG_LOADER_LINK) \ 1005 template(java_lang_invoke_MemberName,MN_ACCESS_VM_ANNOTATIONS) \ 1006 template(java_lang_invoke_MemberName,MN_MODULE_MODE) \ 1007 template(java_lang_invoke_MemberName,MN_UNCONDITIONAL_MODE) \ 1008 template(java_lang_invoke_MemberName,MN_TRUSTED_MODE) \ 1009 /*end*/ 1010 1011 #define IGNORE_REQ(req_expr) /* req_expr */ 1012 #define ONE_PLUS(scope,value) 1+ 1013 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0; 1014 #define VALUE_COMMA(scope,value) scope::value, 1015 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 }; 1016 #define STRING_NULL(scope,value) #value "\0" 1017 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) }; 1018 1019 static bool advertise_con_value(int which) { 1020 if (which < 0) return false; 1021 bool ok = true; 1022 int count = 0; 1023 #define INC_COUNT(scope,value) \ 1024 ++count; 1025 #define CHECK_REQ(req_expr) \ 1026 if (which < count) return ok; \ 1027 ok = (req_expr); 1028 EACH_NAMED_CON(INC_COUNT, CHECK_REQ); 1029 #undef INC_COUNT 1030 #undef CHECK_REQ 1031 assert(count == con_value_count, ""); 1032 if (which < count) return ok; 1033 return false; 1034 } 1035 1036 #undef ONE_PLUS 1037 #undef VALUE_COMMA 1038 #undef STRING_NULL 1039 #undef EACH_NAMED_CON 1040 #endif // PRODUCT 1041 1042 JVM_ENTRY_PROF(jint, MHN_getNamedCon, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { 1043 #ifndef PRODUCT 1044 if (advertise_con_value(which)) { 1045 assert(which >= 0 && which < con_value_count, ""); 1046 int con = con_values[which]; 1047 objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); 1048 if (box.not_null() && box->klass() == Universe::objectArrayKlass() && box->length() > 0) { 1049 const char* str = &con_names[0]; 1050 for (int i = 0; i < which; i++) 1051 str += strlen(str) + 1; // skip name and null 1052 oop name = java_lang_String::create_oop_from_str(str, CHECK_0); // possible safepoint 1053 box->obj_at_put(0, name); 1054 } 1055 return con; 1056 } 1057 #endif 1058 return 0; 1059 } 1060 JVM_END 1061 1062 // void init(MemberName self, AccessibleObject ref) 1063 JVM_ENTRY_PROF(void, MHN_init_Mem, MHN_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) { 1064 if (mname_jh == nullptr) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } 1065 if (target_jh == nullptr) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } 1066 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); 1067 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); 1068 MethodHandles::init_MemberName(mname, target, CHECK); 1069 } 1070 JVM_END 1071 1072 // void expand(MemberName self) 1073 JVM_ENTRY_PROF(void, MHN_expand_Mem, MHN_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) { 1074 if (mname_jh == nullptr) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } 1075 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); 1076 MethodHandles::expand_MemberName(mname, 0, CHECK); 1077 } 1078 JVM_END 1079 1080 // void resolve(MemberName self, Class<?> caller) 1081 JVM_ENTRY_PROF(jobject, MHN_resolve_Mem, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh, 1082 jint lookup_mode, jboolean speculative_resolve)) { 1083 if (mname_jh == nullptr) { THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "mname is null"); } 1084 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); 1085 1086 // The trusted Java code that calls this method should already have performed 1087 // access checks on behalf of the given caller. But, we can verify this. 1088 // This only verifies from the context of the lookup class. It does not 1089 // verify the lookup context for a Lookup object teleported from one module 1090 // to another. Such Lookup object can only access the intersection of the set 1091 // of accessible classes from both lookup class and previous lookup class. 1092 if (VerifyMethodHandles && (lookup_mode & LM_TRUSTED) == LM_TRUSTED && caller_jh != nullptr && 1093 java_lang_invoke_MemberName::clazz(mname()) != nullptr) { 1094 Klass* reference_klass = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 1095 if (reference_klass != nullptr && reference_klass->is_objArray_klass()) { 1096 reference_klass = ObjArrayKlass::cast(reference_klass)->bottom_klass(); 1097 } 1098 1099 // Reflection::verify_class_access can only handle instance classes. 1100 if (reference_klass != nullptr && reference_klass->is_instance_klass()) { 1101 // Emulate LinkResolver::check_klass_accessability. 1102 Klass* caller = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh)); 1103 // access check on behalf of the caller if this is not a public lookup 1104 // i.e. lookup mode is not UNCONDITIONAL 1105 if ((lookup_mode & LM_UNCONDITIONAL) == 0 1106 && Reflection::verify_class_access(caller, 1107 InstanceKlass::cast(reference_klass), 1108 true) != Reflection::ACCESS_OK) { 1109 ResourceMark rm(THREAD); 1110 stringStream ss; 1111 ss.print("caller %s tried to access %s", caller->class_in_module_of_loader(), 1112 reference_klass->class_in_module_of_loader()); 1113 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), ss.as_string()); 1114 } 1115 } 1116 } 1117 1118 Klass* caller = caller_jh == nullptr ? nullptr : 1119 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh)); 1120 Handle resolved = MethodHandles::resolve_MemberName(mname, caller, lookup_mode, 1121 speculative_resolve == JNI_TRUE, 1122 CHECK_NULL); 1123 1124 if (resolved.is_null()) { 1125 int flags = java_lang_invoke_MemberName::flags(mname()); 1126 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; 1127 if (!MethodHandles::ref_kind_is_valid(ref_kind)) { 1128 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format"); 1129 } 1130 if (speculative_resolve) { 1131 assert(!HAS_PENDING_EXCEPTION, "No exceptions expected when resolving speculatively"); 1132 return nullptr; 1133 } 1134 if ((flags & ALL_KINDS) == IS_FIELD) { 1135 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "field resolution failed"); 1136 } else if ((flags & ALL_KINDS) == IS_METHOD || 1137 (flags & ALL_KINDS) == IS_CONSTRUCTOR) { 1138 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "method resolution failed"); 1139 } else { 1140 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed"); 1141 } 1142 } 1143 1144 return JNIHandles::make_local(THREAD, resolved()); 1145 } 1146 JVM_END 1147 1148 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) { 1149 if (mname == nullptr || 1150 java_lang_invoke_MemberName::clazz(mname) == nullptr) { 1151 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved"); 1152 } else { 1153 int flags = java_lang_invoke_MemberName::flags(mname); 1154 if ((flags & IS_FIELD) != 0 && 1155 (must_be_static 1156 ? (flags & JVM_ACC_STATIC) != 0 1157 : (flags & JVM_ACC_STATIC) == 0)) { 1158 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname); 1159 return (jlong) vmindex; 1160 } 1161 } 1162 const char* msg = (must_be_static ? "static field required" : "non-static field required"); 1163 THROW_MSG_0(vmSymbols::java_lang_InternalError(), msg); 1164 return 0; 1165 } 1166 1167 JVM_ENTRY_PROF(jlong, MHN_objectFieldOffset, MHN_objectFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { 1168 return find_member_field_offset(JNIHandles::resolve(mname_jh), false, THREAD); 1169 } 1170 JVM_END 1171 1172 JVM_ENTRY_PROF(jlong, MHN_staticFieldOffset, MHN_staticFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { 1173 return find_member_field_offset(JNIHandles::resolve(mname_jh), true, THREAD); 1174 } 1175 JVM_END 1176 1177 JVM_ENTRY_PROF(jobject, MHN_staticFieldBase, MHN_staticFieldBase(JNIEnv *env, jobject igcls, jobject mname_jh)) { 1178 // use the other function to perform sanity checks: 1179 jlong ignore = find_member_field_offset(JNIHandles::resolve(mname_jh), true, CHECK_NULL); 1180 oop clazz = java_lang_invoke_MemberName::clazz(JNIHandles::resolve_non_null(mname_jh)); 1181 return JNIHandles::make_local(THREAD, clazz); 1182 } 1183 JVM_END 1184 1185 JVM_ENTRY_PROF(jobject, MHN_getMemberVMInfo, MHN_getMemberVMInfo(JNIEnv *env, jobject igcls, jobject mname_jh)) { 1186 if (mname_jh == nullptr) return nullptr; 1187 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); 1188 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname()); 1189 objArrayHandle result = oopFactory::new_objArray_handle(vmClasses::Object_klass(), 2, CHECK_NULL); 1190 jvalue vmindex_value; vmindex_value.j = (long)vmindex; 1191 oop x = java_lang_boxing_object::create(T_LONG, &vmindex_value, CHECK_NULL); 1192 result->obj_at_put(0, x); 1193 1194 int flags = java_lang_invoke_MemberName::flags(mname()); 1195 if ((flags & IS_FIELD) != 0) { 1196 x = java_lang_invoke_MemberName::clazz(mname()); 1197 } else { 1198 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); 1199 assert(vmtarget != nullptr && vmtarget->is_method(), "vmtarget is only method"); 1200 x = mname(); 1201 } 1202 result->obj_at_put(1, x); 1203 return JNIHandles::make_local(THREAD, result()); 1204 } 1205 JVM_END 1206 1207 JVM_ENTRY_PROF(void, MHN_setCallSiteTargetNormal, MHN_setCallSiteTargetNormal(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { 1208 Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); 1209 Handle target (THREAD, JNIHandles::resolve_non_null(target_jh)); 1210 DeoptimizationScope deopt_scope; 1211 { 1212 // Walk all nmethods depending on this call site. 1213 MutexLocker mu(thread, Compile_lock); 1214 MethodHandles::mark_dependent_nmethods(&deopt_scope, call_site, target); 1215 java_lang_invoke_CallSite::set_target(call_site(), target()); 1216 // This is assumed to be an 'atomic' operation by verification. 1217 // So keep it under lock for now. 1218 deopt_scope.deoptimize_marked(); 1219 } 1220 } 1221 JVM_END 1222 1223 JVM_ENTRY_PROF(void, MHN_setCallSiteTargetVolatile, MHN_setCallSiteTargetVolatile(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { 1224 Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); 1225 Handle target (THREAD, JNIHandles::resolve_non_null(target_jh)); 1226 DeoptimizationScope deopt_scope; 1227 { 1228 // Walk all nmethods depending on this call site. 1229 MutexLocker mu(thread, Compile_lock); 1230 MethodHandles::mark_dependent_nmethods(&deopt_scope, call_site, target); 1231 java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); 1232 // This is assumed to be an 'atomic' operation by verification. 1233 // So keep it under lock for now. 1234 deopt_scope.deoptimize_marked(); 1235 } 1236 } 1237 JVM_END 1238 1239 JVM_ENTRY_PROF(void, MHN_copyOutBootstrapArguments, MHN_copyOutBootstrapArguments(JNIEnv* env, jobject igcls, 1240 jobject caller_jh, jintArray index_info_jh, 1241 jint start, jint end, 1242 jobjectArray buf_jh, jint pos, 1243 jboolean resolve, jobject ifna_jh)) { 1244 // caller->constants->copy_bootstrap_arguments_at performs a runtime 1245 // range check, but let's assert earlier as well. 1246 assert(start < end && start >= 0, "invariant"); 1247 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller_jh)); 1248 if (caller_k == nullptr || !caller_k->is_instance_klass()) { 1249 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad caller"); 1250 } 1251 InstanceKlass* caller = InstanceKlass::cast(caller_k); 1252 typeArrayOop index_info_oop = (typeArrayOop) JNIHandles::resolve(index_info_jh); 1253 if (index_info_oop == nullptr || 1254 index_info_oop->klass() != Universe::intArrayKlass() || 1255 typeArrayOop(index_info_oop)->length() < 2) { 1256 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad index info (0)"); 1257 } 1258 typeArrayHandle index_info(THREAD, index_info_oop); 1259 int bss_index_in_pool = index_info->int_at(1); 1260 // While we are here, take a quick look at the index info: 1261 if (bss_index_in_pool <= 0 || 1262 bss_index_in_pool >= caller->constants()->length() || 1263 index_info->int_at(0) 1264 != caller->constants()->bootstrap_argument_count_at(bss_index_in_pool)) { 1265 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad index info (1)"); 1266 } 1267 1268 objArrayHandle buf(THREAD, (objArrayOop)JNIHandles::resolve(buf_jh)); 1269 1270 Handle ifna(THREAD, JNIHandles::resolve(ifna_jh)); 1271 caller->constants()-> 1272 copy_bootstrap_arguments_at(bss_index_in_pool, 1273 start, end, buf, pos, 1274 (resolve == JNI_TRUE), ifna, CHECK); 1275 } 1276 JVM_END 1277 1278 /** 1279 * Throws a java/lang/UnsupportedOperationException unconditionally. 1280 * This is required by the specification of MethodHandle.invoke if 1281 * invoked directly. 1282 */ 1283 JVM_ENTRY_PROF(jobject, MH_invoke_UOE, MH_invoke_UOE(JNIEnv* env, jobject mh, jobjectArray args)) { 1284 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invoke cannot be invoked reflectively"); 1285 return nullptr; 1286 } 1287 JVM_END 1288 1289 /** 1290 * Throws a java/lang/UnsupportedOperationException unconditionally. 1291 * This is required by the specification of MethodHandle.invokeExact if 1292 * invoked directly. 1293 */ 1294 JVM_ENTRY_PROF(jobject, MH_invokeExact_UOE, MH_invokeExact_UOE(JNIEnv* env, jobject mh, jobjectArray args)) { 1295 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invokeExact cannot be invoked reflectively"); 1296 return nullptr; 1297 } 1298 JVM_END 1299 1300 /** 1301 * Throws a java/lang/UnsupportedOperationException unconditionally. 1302 * This is required by the specification of VarHandle.{access-mode} if 1303 * invoked directly. 1304 */ 1305 JVM_ENTRY(jobject, VH_UOE(JNIEnv* env, jobject vh, jobjectArray args)) { 1306 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "VarHandle access mode methods cannot be invoked reflectively"); 1307 return nullptr; 1308 } 1309 JVM_END 1310 1311 1312 /// JVM_RegisterMethodHandleMethods 1313 1314 #define LANG "Ljava/lang/" 1315 #define JLINV "Ljava/lang/invoke/" 1316 1317 #define OBJ LANG "Object;" 1318 #define CLS LANG "Class;" 1319 #define STRG LANG "String;" 1320 #define CS JLINV "CallSite;" 1321 #define MT JLINV "MethodType;" 1322 #define MH JLINV "MethodHandle;" 1323 #define MEM JLINV "MemberName;" 1324 1325 #define CC (char*) /*cast a literal from (const char*)*/ 1326 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) 1327 1328 // These are the native methods on java.lang.invoke.MethodHandleNatives. 1329 static JNINativeMethod MHN_methods[] = { 1330 {CC "init", CC "(" MEM "" OBJ ")V", FN_PTR(MHN_init_Mem)}, 1331 {CC "expand", CC "(" MEM ")V", FN_PTR(MHN_expand_Mem)}, 1332 {CC "resolve", CC "(" MEM "" CLS "IZ)" MEM, FN_PTR(MHN_resolve_Mem)}, 1333 // static native int getNamedCon(int which, Object[] name) 1334 {CC "getNamedCon", CC "(I[" OBJ ")I", FN_PTR(MHN_getNamedCon)}, 1335 {CC "objectFieldOffset", CC "(" MEM ")J", FN_PTR(MHN_objectFieldOffset)}, 1336 {CC "setCallSiteTargetNormal", CC "(" CS "" MH ")V", FN_PTR(MHN_setCallSiteTargetNormal)}, 1337 {CC "setCallSiteTargetVolatile", CC "(" CS "" MH ")V", FN_PTR(MHN_setCallSiteTargetVolatile)}, 1338 {CC "copyOutBootstrapArguments", CC "(" CLS "[III[" OBJ "IZ" OBJ ")V", FN_PTR(MHN_copyOutBootstrapArguments)}, 1339 {CC "staticFieldOffset", CC "(" MEM ")J", FN_PTR(MHN_staticFieldOffset)}, 1340 {CC "staticFieldBase", CC "(" MEM ")" OBJ, FN_PTR(MHN_staticFieldBase)}, 1341 {CC "getMemberVMInfo", CC "(" MEM ")" OBJ, FN_PTR(MHN_getMemberVMInfo)} 1342 }; 1343 1344 static JNINativeMethod MH_methods[] = { 1345 // UnsupportedOperationException throwers 1346 {CC "invoke", CC "([" OBJ ")" OBJ, FN_PTR(MH_invoke_UOE)}, 1347 {CC "invokeExact", CC "([" OBJ ")" OBJ, FN_PTR(MH_invokeExact_UOE)} 1348 }; 1349 static JNINativeMethod VH_methods[] = { 1350 // UnsupportedOperationException throwers 1351 {CC "get", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1352 {CC "set", CC "([" OBJ ")V", FN_PTR(VH_UOE)}, 1353 {CC "getVolatile", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1354 {CC "setVolatile", CC "([" OBJ ")V", FN_PTR(VH_UOE)}, 1355 {CC "getAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1356 {CC "setRelease", CC "([" OBJ ")V", FN_PTR(VH_UOE)}, 1357 {CC "getOpaque", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1358 {CC "setOpaque", CC "([" OBJ ")V", FN_PTR(VH_UOE)}, 1359 {CC "compareAndSet", CC "([" OBJ ")Z", FN_PTR(VH_UOE)}, 1360 {CC "compareAndExchange", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1361 {CC "compareAndExchangeAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1362 {CC "compareAndExchangeRelease", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1363 {CC "weakCompareAndSetPlain", CC "([" OBJ ")Z", FN_PTR(VH_UOE)}, 1364 {CC "weakCompareAndSet", CC "([" OBJ ")Z", FN_PTR(VH_UOE)}, 1365 {CC "weakCompareAndSetAcquire", CC "([" OBJ ")Z", FN_PTR(VH_UOE)}, 1366 {CC "weakCompareAndSetRelease", CC "([" OBJ ")Z", FN_PTR(VH_UOE)}, 1367 {CC "getAndSet", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1368 {CC "getAndSetAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1369 {CC "getAndSetRelease", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1370 {CC "getAndAdd", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1371 {CC "getAndAddAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1372 {CC "getAndAddRelease", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1373 {CC "getAndBitwiseOr", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1374 {CC "getAndBitwiseOrAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1375 {CC "getAndBitwiseOrRelease", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1376 {CC "getAndBitwiseAnd", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1377 {CC "getAndBitwiseAndAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1378 {CC "getAndBitwiseAndRelease", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1379 {CC "getAndBitwiseXor", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1380 {CC "getAndBitwiseXorAcquire", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)}, 1381 {CC "getAndBitwiseXorRelease", CC "([" OBJ ")" OBJ, FN_PTR(VH_UOE)} 1382 }; 1383 1384 /** 1385 * This one function is exported, used by NativeLookup. 1386 */ 1387 JVM_ENTRY_PROF(void, JVM_RegisterMethodHandleMethods, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { 1388 assert(!MethodHandles::enabled(), "must not be enabled"); 1389 assert(vmClasses::MethodHandle_klass() != nullptr, "should be present"); 1390 assert(vmClasses::VarHandle_klass() != nullptr, "should be present"); 1391 1392 oop mh_mirror = vmClasses::MethodHandle_klass()->java_mirror(); 1393 oop vh_mirror = vmClasses::VarHandle_klass()->java_mirror(); 1394 jclass MH_class = (jclass) JNIHandles::make_local(THREAD, mh_mirror); 1395 jclass VH_class = (jclass) JNIHandles::make_local(THREAD, vh_mirror); 1396 1397 { 1398 ThreadToNativeFromVM ttnfv(thread); 1399 1400 int status = env->RegisterNatives(MHN_class, MHN_methods, sizeof(MHN_methods)/sizeof(JNINativeMethod)); 1401 guarantee(status == JNI_OK && !env->ExceptionCheck(), 1402 "register java.lang.invoke.MethodHandleNative natives"); 1403 1404 status = env->RegisterNatives(MH_class, MH_methods, sizeof(MH_methods)/sizeof(JNINativeMethod)); 1405 guarantee(status == JNI_OK && !env->ExceptionCheck(), 1406 "register java.lang.invoke.MethodHandle natives"); 1407 1408 status = env->RegisterNatives(VH_class, VH_methods, sizeof(VH_methods)/sizeof(JNINativeMethod)); 1409 guarantee(status == JNI_OK && !env->ExceptionCheck(), 1410 "register java.lang.invoke.VarHandle natives"); 1411 } 1412 1413 log_debug(methodhandles, indy)("MethodHandle support loaded (using LambdaForms)"); 1414 1415 MethodHandles::set_enabled(true); 1416 } 1417 JVM_END 1418 1419 #define DO_COUNTERS(macro) \ 1420 macro(MHN_init_Mem) \ 1421 macro(MHN_expand_Mem) \ 1422 macro(MHN_resolve_Mem) \ 1423 macro(MHN_getNamedCon) \ 1424 macro(MHN_objectFieldOffset) \ 1425 macro(MHN_setCallSiteTargetNormal) \ 1426 macro(MHN_setCallSiteTargetVolatile) \ 1427 macro(MHN_copyOutBootstrapArguments) \ 1428 macro(MHN_staticFieldOffset) \ 1429 macro(MHN_staticFieldBase) \ 1430 macro(MHN_getMemberVMInfo) \ 1431 macro(MH_invoke_UOE) \ 1432 macro(MH_invokeExact_UOE) \ 1433 macro(JVM_RegisterMethodHandleMethods) 1434 1435 #define INIT_COUNTER(name) \ 1436 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \ 1437 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \ 1438 1439 void MethodHandles::init_counters() { 1440 if (UsePerfData) { 1441 EXCEPTION_MARK; 1442 1443 DO_COUNTERS(INIT_COUNTER) 1444 1445 if (HAS_PENDING_EXCEPTION) { 1446 vm_exit_during_initialization("perf_mhn_init failed unexpectedly"); 1447 } 1448 } 1449 } 1450 1451 #undef INIT_COUNTER 1452 1453 #define PRINT_COUNTER(name) {\ 1454 jlong count = _perf_##name##_count->get_value(); \ 1455 if (count > 0) { \ 1456 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", #name, \ 1457 _perf_##name##_timer->elapsed_counter_value_us(), \ 1458 _perf_##name##_timer->thread_counter_value_us(), \ 1459 count); \ 1460 }} 1461 1462 void MethodHandles::print_counters_on(outputStream* st) { 1463 if (ProfileVMCalls && UsePerfData) { 1464 DO_COUNTERS(PRINT_COUNTER) 1465 } else { 1466 st->print_cr(" MHN: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData")); 1467 } 1468 } 1469 1470 #undef PRINT_COUNTER --- EOF ---