1 /* 2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2024 Red Hat, Inc. 4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved. 5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 6 * 7 * This code is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 only, as 9 * published by the Free Software Foundation. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 * 25 */ 26 27 #include "precompiled.hpp" 28 #include "ci/ciReplay.hpp" 29 #include "classfile/altHashing.hpp" 30 #include "classfile/classFileStream.hpp" 31 #include "classfile/classLoader.hpp" 32 #include "classfile/classLoadInfo.hpp" 33 #include "classfile/javaClasses.hpp" 34 #include "classfile/javaClasses.inline.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/modules.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "compiler/compiler_globals.hpp" 43 #include "gc/shared/collectedHeap.hpp" 44 #include "gc/shared/gcLocker.inline.hpp" 45 #include "gc/shared/stringdedup/stringDedup.hpp" 46 #include "interpreter/linkResolver.hpp" 47 #include "jni.h" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "memory/allocation.hpp" 51 #include "memory/allocation.inline.hpp" 52 #include "memory/oopFactory.hpp" 53 #include "memory/resourceArea.hpp" 54 #include "memory/universe.hpp" 55 #include "nmt/memTracker.hpp" 56 #include "oops/access.inline.hpp" 57 #include "oops/arrayOop.hpp" 58 #include "oops/flatArrayOop.inline.hpp" 59 #include "oops/inlineKlass.inline.hpp" 60 #include "oops/instanceKlass.inline.hpp" 61 #include "oops/instanceOop.hpp" 62 #include "oops/klass.inline.hpp" 63 #include "oops/markWord.hpp" 64 #include "oops/method.hpp" 65 #include "oops/objArrayKlass.hpp" 66 #include "oops/objArrayOop.inline.hpp" 67 #include "oops/oop.inline.hpp" 68 #include "oops/symbol.hpp" 69 #include "oops/typeArrayKlass.hpp" 70 #include "oops/typeArrayOop.inline.hpp" 71 #include "prims/jniCheck.hpp" 72 #include "prims/jniExport.hpp" 73 #include "prims/jniFastGetField.hpp" 74 #include "prims/jvm_misc.hpp" 75 #include "prims/jvmtiExport.hpp" 76 #include "prims/jvmtiThreadState.hpp" 77 #include "runtime/arguments.hpp" 78 #include "runtime/atomic.hpp" 79 #include "runtime/fieldDescriptor.inline.hpp" 80 #include "runtime/handles.inline.hpp" 81 #include "runtime/interfaceSupport.inline.hpp" 82 #include "runtime/java.hpp" 83 #include "runtime/javaCalls.hpp" 84 #include "runtime/javaThread.inline.hpp" 85 #include "runtime/jfieldIDWorkaround.hpp" 86 #include "runtime/jniHandles.inline.hpp" 87 #include "runtime/reflection.hpp" 88 #include "runtime/safepointVerifiers.hpp" 89 #include "runtime/sharedRuntime.hpp" 90 #include "runtime/signature.hpp" 91 #include "runtime/synchronizer.hpp" 92 #include "runtime/thread.inline.hpp" 93 #include "runtime/vmOperations.hpp" 94 #include "services/runtimeService.hpp" 95 #include "utilities/defaultStream.hpp" 96 #include "utilities/dtrace.hpp" 97 #include "utilities/events.hpp" 98 #include "utilities/macros.hpp" 99 #include "utilities/vmError.hpp" 100 #if INCLUDE_JVMCI 101 #include "jvmci/jvmciCompiler.hpp" 102 #endif 103 #if INCLUDE_JFR 104 #include "jfr/jfr.hpp" 105 #endif 106 107 static jint CurrentVersion = JNI_VERSION_24; 108 109 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 110 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 111 #endif 112 113 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 114 // '-return' probe regardless of the return path is taken out of the function. 115 // Methods that have multiple return paths use this to avoid having to 116 // instrument each return path. Methods that use CHECK or THROW must use this 117 // since those macros can cause an immediate uninstrumented return. 118 // 119 // In order to get the return value, a reference to the variable containing 120 // the return value must be passed to the constructor of the object, and 121 // the return value must be set before return (since the mark object has 122 // a reference to it). 123 // 124 // Example: 125 // DT_RETURN_MARK_DECL(SomeFunc, int); 126 // JNI_ENTRY(int, SomeFunc, ...) 127 // int return_value = 0; 128 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 129 // foo(CHECK_0) 130 // return_value = 5; 131 // return return_value; 132 // JNI_END 133 #define DT_RETURN_MARK_DECL(name, type, probe) \ 134 DTRACE_ONLY( \ 135 class DTraceReturnProbeMark_##name { \ 136 public: \ 137 const type& _ret_ref; \ 138 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 139 ~DTraceReturnProbeMark_##name() { \ 140 probe; \ 141 } \ 142 } \ 143 ) 144 // Void functions are simpler since there's no return value 145 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 146 DTRACE_ONLY( \ 147 class DTraceReturnProbeMark_##name { \ 148 public: \ 149 ~DTraceReturnProbeMark_##name() { \ 150 probe; \ 151 } \ 152 } \ 153 ) 154 155 // Place these macros in the function to mark the return. Non-void 156 // functions need the type and address of the return value. 157 #define DT_RETURN_MARK(name, type, ref) \ 158 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 159 #define DT_VOID_RETURN_MARK(name) \ 160 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 161 162 163 // Use these to select distinct code for floating-point vs. non-floating point 164 // situations. Used from within common macros where we need slightly 165 // different behavior for Float/Double 166 #define FP_SELECT_Boolean(intcode, fpcode) intcode 167 #define FP_SELECT_Byte(intcode, fpcode) intcode 168 #define FP_SELECT_Char(intcode, fpcode) intcode 169 #define FP_SELECT_Short(intcode, fpcode) intcode 170 #define FP_SELECT_Object(intcode, fpcode) intcode 171 #define FP_SELECT_Int(intcode, fpcode) intcode 172 #define FP_SELECT_Long(intcode, fpcode) intcode 173 #define FP_SELECT_Float(intcode, fpcode) fpcode 174 #define FP_SELECT_Double(intcode, fpcode) fpcode 175 #define FP_SELECT(TypeName, intcode, fpcode) \ 176 FP_SELECT_##TypeName(intcode, fpcode) 177 178 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 179 // (dtrace doesn't do FP yet) 180 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 181 FP_SELECT(TypeName, \ 182 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 183 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 184 FP_SELECT(TypeName, \ 185 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 186 187 188 // out-of-line helpers for class jfieldIDWorkaround: 189 190 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 191 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 192 uintptr_t as_uint = (uintptr_t) id; 193 int offset = raw_instance_offset(id); 194 if (is_checked_jfieldID(id)) { 195 if (!klass_hash_ok(k, id)) { 196 return false; 197 } 198 } 199 return InstanceKlass::cast(k)->contains_field_offset(offset); 200 } else { 201 JNIid* result = (JNIid*) id; 202 #ifdef ASSERT 203 return result != nullptr && result->is_static_field_id(); 204 #else 205 return result != nullptr; 206 #endif 207 } 208 } 209 210 211 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) { 212 if (offset <= small_offset_mask) { 213 Klass* field_klass = k; 214 Klass* super_klass = field_klass->super(); 215 // With compressed oops the most super class with nonstatic fields would 216 // be the owner of fields embedded in the header. 217 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 218 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 219 field_klass = super_klass; // super contains the field also 220 super_klass = field_klass->super(); 221 } 222 debug_only(NoSafepointVerifier nosafepoint;) 223 uintptr_t klass_hash = field_klass->identity_hash(); 224 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 225 } else { 226 #if 0 227 #ifndef PRODUCT 228 { 229 ResourceMark rm; 230 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 231 } 232 #endif 233 #endif 234 return 0; 235 } 236 } 237 238 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 239 uintptr_t as_uint = (uintptr_t) id; 240 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 241 do { 242 debug_only(NoSafepointVerifier nosafepoint;) 243 // Could use a non-blocking query for identity_hash here... 244 if ((k->identity_hash() & klass_mask) == klass_hash) 245 return true; 246 k = k->super(); 247 } while (k != nullptr); 248 return false; 249 } 250 251 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 252 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 253 uintptr_t as_uint = (uintptr_t) id; 254 int offset = raw_instance_offset(id); 255 if (VerifyJNIFields) { 256 if (is_checked_jfieldID(id)) { 257 guarantee(klass_hash_ok(k, id), 258 "Bug in native code: jfieldID class must match object"); 259 } else { 260 #if 0 261 #ifndef PRODUCT 262 if (Verbose) { 263 ResourceMark rm; 264 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 265 } 266 #endif 267 #endif 268 } 269 } 270 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 271 "Bug in native code: jfieldID offset must address interior of object"); 272 } 273 274 // Implementation of JNI entries 275 276 DT_RETURN_MARK_DECL(DefineClass, jclass 277 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 278 279 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 280 const jbyte *buf, jsize bufLen)) 281 HOTSPOT_JNI_DEFINECLASS_ENTRY( 282 env, (char*) name, loaderRef, (char*) buf, bufLen); 283 284 jclass cls = nullptr; 285 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 286 287 // Class resolution will get the class name from the .class stream if the name is null. 288 TempNewSymbol class_name = name == nullptr ? nullptr : 289 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 290 CHECK_NULL); 291 292 ResourceMark rm(THREAD); 293 ClassFileStream st((u1*)buf, bufLen, nullptr, ClassFileStream::verify); 294 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 295 Handle protection_domain; 296 ClassLoadInfo cl_info(protection_domain); 297 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name, 298 class_loader, 299 cl_info, 300 CHECK_NULL); 301 302 if (log_is_enabled(Debug, class, resolve)) { 303 trace_class_resolution(k); 304 } 305 306 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror()); 307 return cls; 308 JNI_END 309 310 311 312 DT_RETURN_MARK_DECL(FindClass, jclass 313 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 314 315 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 316 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 317 318 jclass result = nullptr; 319 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 320 321 // This should be ClassNotFoundException imo. 322 TempNewSymbol class_name = 323 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 324 CHECK_NULL); 325 326 //%note jni_3 327 Handle protection_domain; 328 // Find calling class 329 Klass* k = thread->security_get_caller_class(0); 330 // default to the system loader when no context 331 Handle loader(THREAD, SystemDictionary::java_system_loader()); 332 if (k != nullptr) { 333 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 334 // in the correct class context. 335 if (k->class_loader() == nullptr && 336 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) { 337 JavaValue result(T_OBJECT); 338 JavaCalls::call_static(&result, k, 339 vmSymbols::getFromClass_name(), 340 vmSymbols::void_class_signature(), 341 CHECK_NULL); 342 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns 343 // a non-null Class object. When invoked from JNI_OnUnload, 344 // it will return null to indicate no context. 345 oop mirror = result.get_oop(); 346 if (mirror != nullptr) { 347 Klass* fromClass = java_lang_Class::as_Klass(mirror); 348 loader = Handle(THREAD, fromClass->class_loader()); 349 protection_domain = Handle(THREAD, fromClass->protection_domain()); 350 } 351 } else { 352 loader = Handle(THREAD, k->class_loader()); 353 } 354 } 355 356 result = find_class_from_class_loader(env, class_name, true, loader, 357 protection_domain, true, thread); 358 359 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 360 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 361 } 362 363 return result; 364 JNI_END 365 366 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 367 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 368 369 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 370 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 371 372 jmethodID ret = nullptr; 373 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 374 375 // method is a handle to a java.lang.reflect.Method object 376 oop reflected = JNIHandles::resolve_non_null(method); 377 oop mirror = nullptr; 378 int slot = 0; 379 380 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) { 381 mirror = java_lang_reflect_Constructor::clazz(reflected); 382 slot = java_lang_reflect_Constructor::slot(reflected); 383 } else { 384 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type"); 385 mirror = java_lang_reflect_Method::clazz(reflected); 386 slot = java_lang_reflect_Method::slot(reflected); 387 } 388 Klass* k1 = java_lang_Class::as_Klass(mirror); 389 390 // Make sure class is initialized before handing id's out to methods 391 k1->initialize(CHECK_NULL); 392 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 393 ret = m==nullptr? nullptr : m->jmethod_id(); // return null if reflected method deleted 394 return ret; 395 JNI_END 396 397 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 398 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 399 400 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 401 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 402 403 jfieldID ret = nullptr; 404 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 405 406 // field is a handle to a java.lang.reflect.Field object 407 oop reflected = JNIHandles::resolve_non_null(field); 408 oop mirror = java_lang_reflect_Field::clazz(reflected); 409 Klass* k1 = java_lang_Class::as_Klass(mirror); 410 int slot = java_lang_reflect_Field::slot(reflected); 411 int modifiers = java_lang_reflect_Field::modifiers(reflected); 412 413 // Make sure class is initialized before handing id's out to fields 414 k1->initialize(CHECK_NULL); 415 416 // First check if this is a static field 417 if (modifiers & JVM_ACC_STATIC) { 418 int offset = InstanceKlass::cast(k1)->field_offset( slot ); 419 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 420 assert(id != nullptr, "corrupt Field object"); 421 debug_only(id->set_is_static_field_id();) 422 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 423 ret = jfieldIDWorkaround::to_static_jfieldID(id); 424 return ret; 425 } 426 427 // The slot is the index of the field description in the field-array 428 // The jfieldID is the offset of the field within the object 429 // It may also have hash bits for k, if VerifyJNIFields is turned on. 430 int offset = InstanceKlass::cast(k1)->field_offset( slot ); 431 bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot); 432 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 433 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat); 434 return ret; 435 JNI_END 436 437 438 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 439 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 440 441 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 442 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 443 444 jobject ret = nullptr; 445 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 446 447 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 448 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 449 oop reflection_method; 450 if (m->is_object_constructor()) { 451 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 452 } else { 453 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 454 } 455 ret = JNIHandles::make_local(THREAD, reflection_method); 456 return ret; 457 JNI_END 458 459 DT_RETURN_MARK_DECL(GetSuperclass, jclass 460 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 461 462 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 463 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 464 465 jclass obj = nullptr; 466 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 467 468 oop mirror = JNIHandles::resolve_non_null(sub); 469 // primitive classes return null 470 if (java_lang_Class::is_primitive(mirror)) return nullptr; 471 472 // Rules of Class.getSuperClass as implemented by KLass::java_super: 473 // arrays return Object 474 // interfaces return null 475 // proper classes return Klass::super() 476 Klass* k = java_lang_Class::as_Klass(mirror); 477 if (k->is_interface()) return nullptr; 478 479 // return mirror for superclass 480 Klass* super = k->java_super(); 481 // super2 is the value computed by the compiler's getSuperClass intrinsic: 482 debug_only(Klass* super2 = ( k->is_array_klass() 483 ? vmClasses::Object_klass() 484 : k->super() ) ); 485 assert(super == super2, 486 "java_super computation depends on interface, array, other super"); 487 obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror()); 488 return obj; 489 JNI_END 490 491 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 492 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 493 494 oop sub_mirror = JNIHandles::resolve_non_null(sub); 495 oop super_mirror = JNIHandles::resolve_non_null(super); 496 if (java_lang_Class::is_primitive(sub_mirror) || 497 java_lang_Class::is_primitive(super_mirror)) { 498 jboolean ret = (sub_mirror == super_mirror); 499 500 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 501 return ret; 502 } 503 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 504 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 505 assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom"); 506 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 507 JNI_TRUE : JNI_FALSE; 508 509 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 510 return ret; 511 JNI_END 512 513 514 DT_RETURN_MARK_DECL(Throw, jint 515 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 516 517 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 518 HOTSPOT_JNI_THROW_ENTRY(env, obj); 519 520 jint ret = JNI_OK; 521 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 522 523 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 524 ShouldNotReachHere(); 525 return 0; // Mute compiler. 526 JNI_END 527 528 529 DT_RETURN_MARK_DECL(ThrowNew, jint 530 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 531 532 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 533 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 534 535 jint ret = JNI_OK; 536 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 537 538 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 539 Symbol* name = k->name(); 540 Handle class_loader (THREAD, k->class_loader()); 541 Handle protection_domain (THREAD, k->protection_domain()); 542 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 543 ShouldNotReachHere(); 544 return 0; // Mute compiler. 545 JNI_END 546 547 548 // JNI functions only transform a pending async exception to a synchronous 549 // exception in ExceptionOccurred and ExceptionCheck calls, since 550 // delivering an async exception in other places won't change the native 551 // code's control flow and would be harmful when native code further calls 552 // JNI functions with a pending exception. Async exception is also checked 553 // during the call, so ExceptionOccurred/ExceptionCheck won't return 554 // false but deliver the async exception at the very end during 555 // state transition. 556 557 static void jni_check_async_exceptions(JavaThread *thread) { 558 assert(thread == Thread::current(), "must be itself"); 559 if (thread->has_async_exception_condition()) { 560 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */); 561 } 562 } 563 564 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 565 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 566 567 jni_check_async_exceptions(thread); 568 oop exception = thread->pending_exception(); 569 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception); 570 571 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 572 return ret; 573 JNI_END 574 575 576 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 577 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 578 579 if (thread->has_pending_exception()) { 580 Handle ex(thread, thread->pending_exception()); 581 thread->clear_pending_exception(); 582 jio_fprintf(defaultStream::error_stream(), "Exception "); 583 if (thread != nullptr && thread->threadObj() != nullptr) { 584 ResourceMark rm(THREAD); 585 jio_fprintf(defaultStream::error_stream(), 586 "in thread \"%s\" ", thread->name()); 587 } 588 if (ex->is_a(vmClasses::Throwable_klass())) { 589 JavaValue result(T_VOID); 590 JavaCalls::call_virtual(&result, 591 ex, 592 vmClasses::Throwable_klass(), 593 vmSymbols::printStackTrace_name(), 594 vmSymbols::void_method_signature(), 595 THREAD); 596 // If an exception is thrown in the call it gets thrown away. Not much 597 // we can do with it. The native code that calls this, does not check 598 // for the exception - hence, it might still be in the thread when DestroyVM gets 599 // called, potentially causing a few asserts to trigger - since no pending exception 600 // is expected. 601 CLEAR_PENDING_EXCEPTION; 602 } else { 603 ResourceMark rm(THREAD); 604 jio_fprintf(defaultStream::error_stream(), 605 ". Uncaught exception of type %s.", 606 ex->klass()->external_name()); 607 } 608 } 609 610 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 611 JNI_END 612 613 614 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env)) 615 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 616 617 // The jni code might be using this API to clear java thrown exception. 618 // So just mark jvmti thread exception state as exception caught. 619 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 620 if (state != nullptr && state->is_exception_detected()) { 621 state->set_exception_caught(); 622 } 623 thread->clear_pending_exception(); 624 625 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 626 JNI_END 627 628 629 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 630 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 631 632 tty->print_cr("FATAL ERROR in native method: %s", msg); 633 thread->print_jni_stack(); 634 os::abort(); // Dump core and abort 635 JNI_END 636 637 638 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 639 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 640 641 //%note jni_11 642 if (capacity < 0 || 643 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 644 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 645 return JNI_ERR; 646 } 647 648 thread->push_jni_handle_block(); 649 jint ret = JNI_OK; 650 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 651 return ret; 652 JNI_END 653 654 655 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 656 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 657 658 //%note jni_11 659 Handle result_handle(thread, JNIHandles::resolve(result)); 660 JNIHandleBlock* old_handles = thread->active_handles(); 661 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 662 if (new_handles != nullptr) { 663 // As a sanity check we only release the handle blocks if the pop_frame_link is not null. 664 // This way code will still work if PopLocalFrame is called without a corresponding 665 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise 666 // the release_block call will release the blocks. 667 thread->set_active_handles(new_handles); 668 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below 669 JNIHandleBlock::release_block(old_handles, thread); // may block 670 result = JNIHandles::make_local(thread, result_handle()); 671 } 672 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 673 return result; 674 JNI_END 675 676 677 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 678 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 679 680 Handle ref_handle(thread, JNIHandles::resolve(ref)); 681 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL); 682 683 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 684 return ret; 685 JNI_END 686 687 // Must be JNI_ENTRY (with HandleMark) 688 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 689 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 690 691 JNIHandles::destroy_global(ref); 692 693 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 694 JNI_END 695 696 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 697 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 698 699 JNIHandles::destroy_local(obj); 700 701 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 702 JNI_END 703 704 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 705 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 706 707 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 708 709 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 710 return ret; 711 JNI_END 712 713 714 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 715 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 716 717 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref), 718 AllocFailStrategy::RETURN_NULL); 719 720 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 721 return ret; 722 JNI_END 723 724 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 725 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 726 727 jint ret; 728 if (capacity >= 0 && 729 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 730 ret = JNI_OK; 731 } else { 732 ret = JNI_ERR; 733 } 734 735 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 736 return ret; 737 JNI_END 738 739 // Return the Handle Type 740 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 741 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 742 743 jobjectRefType ret = JNIInvalidRefType; 744 if (obj != nullptr) { 745 ret = JNIHandles::handle_type(thread, obj); 746 } 747 748 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 749 return ret; 750 JNI_END 751 752 753 class JNI_ArgumentPusher : public SignatureIterator { 754 protected: 755 JavaCallArguments* _arguments; 756 757 void push_int(jint x) { _arguments->push_int(x); } 758 void push_long(jlong x) { _arguments->push_long(x); } 759 void push_float(jfloat x) { _arguments->push_float(x); } 760 void push_double(jdouble x) { _arguments->push_double(x); } 761 void push_object(jobject x) { _arguments->push_jobject(x); } 762 763 void push_boolean(jboolean b) { 764 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 765 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 766 // TemplateInterpreterGenerator::generate_result_handler_for and 767 // SharedRuntime::generate_native_wrapper. 768 push_int(b == 0 ? JNI_FALSE : JNI_TRUE); 769 } 770 771 JNI_ArgumentPusher(Method* method) 772 : SignatureIterator(method->signature(), 773 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint()) 774 { 775 _arguments = nullptr; 776 } 777 778 public: 779 virtual void push_arguments_on(JavaCallArguments* arguments) = 0; 780 }; 781 782 783 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 784 va_list _ap; 785 786 void set_ap(va_list rap) { 787 va_copy(_ap, rap); 788 } 789 790 friend class SignatureIterator; // so do_parameters_on can call do_type 791 void do_type(BasicType type) { 792 switch (type) { 793 // these are coerced to int when using va_arg 794 case T_BYTE: 795 case T_CHAR: 796 case T_SHORT: 797 case T_INT: push_int(va_arg(_ap, jint)); break; 798 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break; 799 800 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 801 802 case T_LONG: push_long(va_arg(_ap, jlong)); break; 803 // float is coerced to double w/ va_arg 804 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break; 805 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break; 806 807 case T_ARRAY: 808 case T_OBJECT: push_object(va_arg(_ap, jobject)); break; 809 default: ShouldNotReachHere(); 810 } 811 } 812 813 public: 814 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 815 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 816 set_ap(rap); 817 } 818 819 ~JNI_ArgumentPusherVaArg() { 820 va_end(_ap); 821 } 822 823 virtual void push_arguments_on(JavaCallArguments* arguments) { 824 _arguments = arguments; 825 do_parameters_on(this); 826 } 827 }; 828 829 830 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 831 protected: 832 const jvalue *_ap; 833 834 inline void set_ap(const jvalue *rap) { _ap = rap; } 835 836 friend class SignatureIterator; // so do_parameters_on can call do_type 837 void do_type(BasicType type) { 838 switch (type) { 839 case T_CHAR: push_int((_ap++)->c); break; 840 case T_SHORT: push_int((_ap++)->s); break; 841 case T_BYTE: push_int((_ap++)->b); break; 842 case T_INT: push_int((_ap++)->i); break; 843 case T_BOOLEAN: push_boolean((_ap++)->z); break; 844 case T_LONG: push_long((_ap++)->j); break; 845 case T_FLOAT: push_float((_ap++)->f); break; 846 case T_DOUBLE: push_double((_ap++)->d); break; 847 case T_ARRAY: 848 case T_OBJECT: 849 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break; 850 default: ShouldNotReachHere(); 851 } 852 } 853 854 public: 855 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 856 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 857 set_ap(rap); 858 } 859 860 virtual void push_arguments_on(JavaCallArguments* arguments) { 861 _arguments = arguments; 862 do_parameters_on(this); 863 } 864 }; 865 866 867 enum JNICallType { 868 JNI_STATIC, 869 JNI_VIRTUAL, 870 JNI_NONVIRTUAL 871 }; 872 873 874 875 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 876 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 877 878 // Create object to hold arguments for the JavaCall, and associate it with 879 // the jni parser 880 ResourceMark rm(THREAD); 881 int number_of_parameters = method->size_of_parameters(); 882 JavaCallArguments java_args(number_of_parameters); 883 884 assert(method->is_static(), "method should be static"); 885 886 // Fill out JavaCallArguments object 887 args->push_arguments_on(&java_args); 888 // Initialize result type 889 result->set_type(args->return_type()); 890 891 // Invoke the method. Result is returned as oop. 892 JavaCalls::call(result, method, &java_args, CHECK); 893 894 // Convert result 895 if (is_reference_type(result->get_type())) { 896 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 897 } 898 } 899 900 901 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 902 oop recv = JNIHandles::resolve(receiver); 903 if (recv == nullptr) { 904 THROW(vmSymbols::java_lang_NullPointerException()); 905 } 906 Handle h_recv(THREAD, recv); 907 908 int number_of_parameters; 909 Method* selected_method; 910 { 911 Method* m = Method::resolve_jmethod_id(method_id); 912 number_of_parameters = m->size_of_parameters(); 913 InstanceKlass* holder = m->method_holder(); 914 if (call_type != JNI_VIRTUAL) { 915 selected_method = m; 916 } else if (!m->has_itable_index()) { 917 // non-interface call -- for that little speed boost, don't handlize 918 debug_only(NoSafepointVerifier nosafepoint;) 919 // jni_GetMethodID makes sure class is linked and initialized 920 // so m should have a valid vtable index. 921 assert(m->valid_vtable_index(), "no valid vtable index"); 922 int vtbl_index = m->vtable_index(); 923 if (vtbl_index != Method::nonvirtual_vtable_index) { 924 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 925 } else { 926 // final method 927 selected_method = m; 928 } 929 } else { 930 // interface call 931 int itbl_index = m->itable_index(); 932 Klass* k = h_recv->klass(); 933 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 934 } 935 } 936 937 if (selected_method->is_abstract()) { 938 ResourceMark rm(THREAD); 939 THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string()); 940 } 941 942 methodHandle method(THREAD, selected_method); 943 944 // Create object to hold arguments for the JavaCall, and associate it with 945 // the jni parser 946 ResourceMark rm(THREAD); 947 JavaCallArguments java_args(number_of_parameters); 948 949 // handle arguments 950 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 951 java_args.push_oop(h_recv); // Push jobject handle 952 953 // Fill out JavaCallArguments object 954 args->push_arguments_on(&java_args); 955 // Initialize result type 956 result->set_type(args->return_type()); 957 958 // Invoke the method. Result is returned as oop. 959 JavaCalls::call(result, method, &java_args, CHECK); 960 961 // Convert result 962 if (is_reference_type(result->get_type())) { 963 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 964 } 965 } 966 967 DT_RETURN_MARK_DECL(AllocObject, jobject 968 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 969 970 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 971 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 972 973 jobject ret = nullptr; 974 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 975 976 oop clazzoop = JNIHandles::resolve_non_null(clazz); 977 Klass* k = java_lang_Class::as_Klass(clazzoop); 978 if (k == nullptr || k->is_inline_klass()) { 979 ResourceMark rm(THREAD); 980 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 981 } 982 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 983 ret = JNIHandles::make_local(THREAD, i); 984 return ret; 985 JNI_END 986 987 DT_RETURN_MARK_DECL(NewObjectA, jobject 988 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 989 990 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 991 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 992 993 jobject obj = nullptr; 994 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj); 995 996 oop clazzoop = JNIHandles::resolve_non_null(clazz); 997 Klass* k = java_lang_Class::as_Klass(clazzoop); 998 if (k == nullptr) { 999 ResourceMark rm(THREAD); 1000 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1001 } 1002 1003 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1004 obj = JNIHandles::make_local(THREAD, i); 1005 JavaValue jvalue(T_VOID); 1006 JNI_ArgumentPusherArray ap(methodID, args); 1007 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1008 1009 return obj; 1010 JNI_END 1011 1012 1013 DT_RETURN_MARK_DECL(NewObjectV, jobject 1014 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1015 1016 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1017 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1018 1019 jobject obj = nullptr; 1020 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1021 1022 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1023 Klass* k = java_lang_Class::as_Klass(clazzoop); 1024 if (k == nullptr) { 1025 ResourceMark rm(THREAD); 1026 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1027 } 1028 1029 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1030 obj = JNIHandles::make_local(THREAD, i); 1031 JavaValue jvalue(T_VOID); 1032 JNI_ArgumentPusherVaArg ap(methodID, args); 1033 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1034 1035 return obj; 1036 JNI_END 1037 1038 1039 DT_RETURN_MARK_DECL(NewObject, jobject 1040 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1041 1042 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1043 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1044 1045 jobject obj = nullptr; 1046 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1047 1048 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1049 Klass* k = java_lang_Class::as_Klass(clazzoop); 1050 if (k == nullptr) { 1051 ResourceMark rm(THREAD); 1052 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1053 } 1054 1055 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1056 obj = JNIHandles::make_local(THREAD, i); 1057 va_list args; 1058 va_start(args, methodID); 1059 JavaValue jvalue(T_VOID); 1060 JNI_ArgumentPusherVaArg ap(methodID, args); 1061 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1062 va_end(args); 1063 1064 return obj; 1065 JNI_END 1066 1067 1068 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1069 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1070 1071 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1072 jclass ret = 1073 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1074 1075 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1076 return ret; 1077 JNI_END 1078 1079 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1080 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1081 1082 jboolean ret = JNI_TRUE; 1083 if (obj != nullptr) { 1084 ret = JNI_FALSE; 1085 Klass* k = java_lang_Class::as_Klass( 1086 JNIHandles::resolve_non_null(clazz)); 1087 if (k != nullptr) { 1088 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1089 } 1090 } 1091 1092 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1093 return ret; 1094 JNI_END 1095 1096 1097 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1098 const char *sig, bool is_static, TRAPS) { 1099 // %%%% This code should probably just call into a method in the LinkResolver 1100 // 1101 // The class should have been loaded (we have an instance of the class 1102 // passed in) so the method and signature should already be in the symbol 1103 // table. If they're not there, the method doesn't exist. 1104 const char *name_to_probe = (name_str == nullptr) 1105 ? vmSymbols::object_initializer_name()->as_C_string() 1106 : name_str; 1107 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1108 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1109 1110 if (name == nullptr || signature == nullptr) { 1111 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1112 } 1113 1114 oop mirror = JNIHandles::resolve_non_null(clazz); 1115 Klass* klass = java_lang_Class::as_Klass(mirror); 1116 1117 // Throw a NoSuchMethodError exception if we have an instance of a 1118 // primitive java.lang.Class 1119 if (java_lang_Class::is_primitive(mirror)) { 1120 ResourceMark rm(THREAD); 1121 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1122 } 1123 1124 // Make sure class is linked and initialized before handing id's out to 1125 // Method*s. 1126 klass->initialize(CHECK_NULL); 1127 1128 Method* m; 1129 if (name == vmSymbols::object_initializer_name() || 1130 name == vmSymbols::class_initializer_name()) { 1131 // Never search superclasses for constructors 1132 if (klass->is_instance_klass()) { 1133 m = InstanceKlass::cast(klass)->find_method(name, signature); 1134 } else { 1135 m = nullptr; 1136 } 1137 } else { 1138 m = klass->lookup_method(name, signature); 1139 if (m == nullptr && klass->is_instance_klass()) { 1140 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1141 } 1142 } 1143 if (m == nullptr || (m->is_static() != is_static)) { 1144 ResourceMark rm(THREAD); 1145 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1146 } 1147 return m->jmethod_id(); 1148 } 1149 1150 1151 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1152 const char *name, const char *sig)) 1153 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1154 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1155 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1156 return ret; 1157 JNI_END 1158 1159 1160 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1161 const char *name, const char *sig)) 1162 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1163 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1164 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1165 return ret; 1166 JNI_END 1167 1168 1169 1170 // 1171 // Calling Methods 1172 // 1173 1174 1175 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1176 , EntryProbe, ReturnProbe) \ 1177 \ 1178 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1179 , ReturnProbe); \ 1180 \ 1181 JNI_ENTRY(ResultType, \ 1182 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1183 \ 1184 EntryProbe; \ 1185 ResultType ret{}; \ 1186 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1187 (const ResultType&)ret);\ 1188 \ 1189 va_list args; \ 1190 va_start(args, methodID); \ 1191 JavaValue jvalue(Tag); \ 1192 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1193 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \ 1194 va_end(args); \ 1195 ret = jvalue.get_##ResultType(); \ 1196 return ret;\ 1197 JNI_END 1198 1199 // the runtime type of subword integral basic types is integer 1200 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1201 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1202 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1203 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1204 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1205 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1206 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1207 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1208 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1209 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1210 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1211 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1212 1213 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1214 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1215 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1216 DEFINE_CALLMETHOD(jint, Int, T_INT, 1217 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1218 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1219 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1220 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1221 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1222 // Float and double probes don't return value because dtrace doesn't currently support it 1223 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1224 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1225 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1226 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1227 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1228 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1229 1230 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1231 , EntryProbe, ReturnProbe) \ 1232 \ 1233 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1234 , ReturnProbe); \ 1235 \ 1236 JNI_ENTRY(ResultType, \ 1237 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1238 \ 1239 EntryProbe;\ 1240 ResultType ret{}; \ 1241 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1242 (const ResultType&)ret);\ 1243 \ 1244 JavaValue jvalue(Tag); \ 1245 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1246 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \ 1247 ret = jvalue.get_##ResultType(); \ 1248 return ret;\ 1249 JNI_END 1250 1251 // the runtime type of subword integral basic types is integer 1252 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1253 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1254 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1255 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1256 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1257 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1258 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1259 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1260 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1261 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1262 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1263 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1264 1265 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1266 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1267 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1268 DEFINE_CALLMETHODV(jint, Int, T_INT, 1269 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1270 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1271 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1272 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1273 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1274 // Float and double probes don't return value because dtrace doesn't currently support it 1275 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1276 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1277 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1278 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1279 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1280 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1281 1282 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1283 , EntryProbe, ReturnProbe) \ 1284 \ 1285 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1286 , ReturnProbe); \ 1287 \ 1288 JNI_ENTRY(ResultType, \ 1289 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1290 EntryProbe; \ 1291 ResultType ret{}; \ 1292 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1293 (const ResultType&)ret);\ 1294 \ 1295 JavaValue jvalue(Tag); \ 1296 JNI_ArgumentPusherArray ap(methodID, args); \ 1297 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \ 1298 ret = jvalue.get_##ResultType(); \ 1299 return ret;\ 1300 JNI_END 1301 1302 // the runtime type of subword integral basic types is integer 1303 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1304 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1305 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1306 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1307 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1308 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1309 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1310 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1311 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1312 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1313 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1314 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1315 1316 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1317 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1318 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1319 DEFINE_CALLMETHODA(jint, Int, T_INT, 1320 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1321 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1322 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1323 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1324 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1325 // Float and double probes don't return value because dtrace doesn't currently support it 1326 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1327 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1328 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1329 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1330 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1331 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1332 1333 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1334 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1335 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1336 1337 1338 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1339 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1340 DT_VOID_RETURN_MARK(CallVoidMethod); 1341 1342 va_list args; 1343 va_start(args, methodID); 1344 JavaValue jvalue(T_VOID); 1345 JNI_ArgumentPusherVaArg ap(methodID, args); 1346 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1347 va_end(args); 1348 JNI_END 1349 1350 1351 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1352 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1353 DT_VOID_RETURN_MARK(CallVoidMethodV); 1354 1355 JavaValue jvalue(T_VOID); 1356 JNI_ArgumentPusherVaArg ap(methodID, args); 1357 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1358 JNI_END 1359 1360 1361 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1362 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1363 DT_VOID_RETURN_MARK(CallVoidMethodA); 1364 1365 JavaValue jvalue(T_VOID); 1366 JNI_ArgumentPusherArray ap(methodID, args); 1367 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1368 JNI_END 1369 1370 1371 1372 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1373 , EntryProbe, ReturnProbe) \ 1374 \ 1375 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1376 , ReturnProbe);\ 1377 \ 1378 JNI_ENTRY(ResultType, \ 1379 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1380 \ 1381 EntryProbe;\ 1382 ResultType ret;\ 1383 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1384 (const ResultType&)ret);\ 1385 \ 1386 va_list args; \ 1387 va_start(args, methodID); \ 1388 JavaValue jvalue(Tag); \ 1389 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1390 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \ 1391 va_end(args); \ 1392 ret = jvalue.get_##ResultType(); \ 1393 return ret;\ 1394 JNI_END 1395 1396 // the runtime type of subword integral basic types is integer 1397 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1398 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1399 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1400 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1401 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1402 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1403 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1404 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1405 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1406 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1407 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1408 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1409 1410 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1411 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1412 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1413 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1414 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1415 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1416 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1417 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1418 // Float and double probes don't return value because dtrace doesn't currently support it 1419 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1420 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1421 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1422 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1423 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1424 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1425 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1426 1427 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1428 , EntryProbe, ReturnProbe) \ 1429 \ 1430 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1431 , ReturnProbe);\ 1432 \ 1433 JNI_ENTRY(ResultType, \ 1434 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1435 \ 1436 EntryProbe;\ 1437 ResultType ret;\ 1438 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1439 (const ResultType&)ret);\ 1440 \ 1441 JavaValue jvalue(Tag); \ 1442 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1443 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \ 1444 ret = jvalue.get_##ResultType(); \ 1445 return ret;\ 1446 JNI_END 1447 1448 // the runtime type of subword integral basic types is integer 1449 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1450 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1451 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1452 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1453 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1454 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1455 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1456 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1457 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1458 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1459 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1460 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1461 1462 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1463 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1464 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1465 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1466 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1467 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1468 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1469 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1470 // Float and double probes don't return value because dtrace doesn't currently support it 1471 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1472 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1473 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1474 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1475 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1476 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1478 1479 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1480 , EntryProbe, ReturnProbe) \ 1481 \ 1482 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1483 , ReturnProbe);\ 1484 \ 1485 JNI_ENTRY(ResultType, \ 1486 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1487 \ 1488 EntryProbe;\ 1489 ResultType ret;\ 1490 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1491 (const ResultType&)ret);\ 1492 \ 1493 JavaValue jvalue(Tag); \ 1494 JNI_ArgumentPusherArray ap(methodID, args); \ 1495 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \ 1496 ret = jvalue.get_##ResultType(); \ 1497 return ret;\ 1498 JNI_END 1499 1500 // the runtime type of subword integral basic types is integer 1501 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1502 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1503 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1504 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1505 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1506 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1507 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1508 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1509 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1510 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1511 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1512 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1513 1514 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1515 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1516 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1517 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1518 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1519 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1520 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1521 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1522 // Float and double probes don't return value because dtrace doesn't currently support it 1523 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1524 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1525 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1526 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1527 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1528 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1530 1531 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1532 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1533 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1534 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1535 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1536 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1537 1538 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1539 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1540 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1541 1542 va_list args; 1543 va_start(args, methodID); 1544 JavaValue jvalue(T_VOID); 1545 JNI_ArgumentPusherVaArg ap(methodID, args); 1546 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1547 va_end(args); 1548 JNI_END 1549 1550 1551 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1552 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1553 env, obj, cls, (uintptr_t) methodID); 1554 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1555 1556 JavaValue jvalue(T_VOID); 1557 JNI_ArgumentPusherVaArg ap(methodID, args); 1558 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1559 JNI_END 1560 1561 1562 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1563 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1564 env, obj, cls, (uintptr_t) methodID); 1565 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1566 JavaValue jvalue(T_VOID); 1567 JNI_ArgumentPusherArray ap(methodID, args); 1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1569 JNI_END 1570 1571 1572 1573 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1574 , EntryProbe, ResultProbe) \ 1575 \ 1576 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1577 , ResultProbe); \ 1578 \ 1579 JNI_ENTRY(ResultType, \ 1580 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1581 \ 1582 EntryProbe; \ 1583 ResultType ret{}; \ 1584 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1585 (const ResultType&)ret);\ 1586 \ 1587 va_list args; \ 1588 va_start(args, methodID); \ 1589 JavaValue jvalue(Tag); \ 1590 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1591 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \ 1592 va_end(args); \ 1593 ret = jvalue.get_##ResultType(); \ 1594 return ret;\ 1595 JNI_END 1596 1597 // the runtime type of subword integral basic types is integer 1598 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1599 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1600 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1601 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1602 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1603 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1604 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1605 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1606 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1607 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1608 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1609 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1610 1611 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1612 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1613 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1614 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1615 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1616 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1617 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1618 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1619 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1620 // Float and double probes don't return value because dtrace doesn't currently support it 1621 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1622 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1623 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1624 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1625 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1627 1628 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1629 , EntryProbe, ResultProbe) \ 1630 \ 1631 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1632 , ResultProbe); \ 1633 \ 1634 JNI_ENTRY(ResultType, \ 1635 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1636 \ 1637 EntryProbe; \ 1638 ResultType ret{}; \ 1639 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1640 (const ResultType&)ret);\ 1641 \ 1642 JavaValue jvalue(Tag); \ 1643 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1644 /* Make sure class is initialized before trying to invoke its method */ \ 1645 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1646 k->initialize(CHECK_(ResultType{})); \ 1647 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \ 1648 va_end(args); \ 1649 ret = jvalue.get_##ResultType(); \ 1650 return ret;\ 1651 JNI_END 1652 1653 // the runtime type of subword integral basic types is integer 1654 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1655 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1656 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1657 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1658 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1659 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1660 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1661 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1662 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1663 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1664 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1665 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1666 1667 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1668 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1669 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1670 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1671 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1672 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1673 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1674 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1675 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1676 // Float and double probes don't return value because dtrace doesn't currently support it 1677 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1678 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1680 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1681 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1683 1684 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1685 , EntryProbe, ResultProbe) \ 1686 \ 1687 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1688 , ResultProbe); \ 1689 \ 1690 JNI_ENTRY(ResultType, \ 1691 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1692 \ 1693 EntryProbe; \ 1694 ResultType ret{}; \ 1695 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1696 (const ResultType&)ret);\ 1697 \ 1698 JavaValue jvalue(Tag); \ 1699 JNI_ArgumentPusherArray ap(methodID, args); \ 1700 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \ 1701 ret = jvalue.get_##ResultType(); \ 1702 return ret;\ 1703 JNI_END 1704 1705 // the runtime type of subword integral basic types is integer 1706 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1707 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1708 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1709 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1710 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1711 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1712 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1713 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1714 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1715 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1716 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1717 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1718 1719 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1720 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1721 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1722 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1723 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1724 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1725 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1726 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1727 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1728 // Float and double probes don't return value because dtrace doesn't currently support it 1729 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1730 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1731 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1732 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1733 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1734 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1735 1736 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1737 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1738 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1739 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1740 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1741 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1742 1743 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1744 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1745 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1746 1747 va_list args; 1748 va_start(args, methodID); 1749 JavaValue jvalue(T_VOID); 1750 JNI_ArgumentPusherVaArg ap(methodID, args); 1751 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1752 va_end(args); 1753 JNI_END 1754 1755 1756 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1757 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1758 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1759 1760 JavaValue jvalue(T_VOID); 1761 JNI_ArgumentPusherVaArg ap(methodID, args); 1762 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1763 JNI_END 1764 1765 1766 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1767 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1768 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1769 1770 JavaValue jvalue(T_VOID); 1771 JNI_ArgumentPusherArray ap(methodID, args); 1772 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1773 JNI_END 1774 1775 1776 // 1777 // Accessing Fields 1778 // 1779 1780 1781 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1782 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1783 1784 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1785 const char *name, const char *sig)) 1786 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1787 jfieldID ret = nullptr; 1788 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1789 1790 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1791 1792 // The class should have been loaded (we have an instance of the class 1793 // passed in) so the field and signature should already be in the symbol 1794 // table. If they're not there, the field doesn't exist. 1795 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1796 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1797 if (fieldname == nullptr || signame == nullptr) { 1798 ResourceMark rm; 1799 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1800 } 1801 1802 // Make sure class is initialized before handing id's out to fields 1803 k->initialize(CHECK_NULL); 1804 1805 fieldDescriptor fd; 1806 if (!k->is_instance_klass() || 1807 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1808 ResourceMark rm; 1809 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1810 } 1811 1812 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1813 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1814 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat()); 1815 return ret; 1816 JNI_END 1817 1818 1819 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1820 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1821 oop o = JNIHandles::resolve_non_null(obj); 1822 Klass* k = o->klass(); 1823 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1824 oop res = nullptr; 1825 // Keep JVMTI addition small and only check enabled flag here. 1826 // jni_GetField_probe() assumes that is okay to create handles. 1827 if (JvmtiExport::should_post_field_access()) { 1828 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1829 } 1830 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) { 1831 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1832 } else { 1833 assert(k->is_instance_klass(), "Only instance can have flat fields"); 1834 InstanceKlass* ik = InstanceKlass::cast(k); 1835 fieldDescriptor fd; 1836 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck 1837 InstanceKlass* holder = fd.field_holder(); 1838 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1839 res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), CHECK_NULL); 1840 } 1841 jobject ret = JNIHandles::make_local(THREAD, res); 1842 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1843 return ret; 1844 JNI_END 1845 1846 1847 1848 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1849 , EntryProbe, ReturnProbe) \ 1850 \ 1851 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1852 , ReturnProbe); \ 1853 \ 1854 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1855 \ 1856 EntryProbe; \ 1857 Return ret = 0;\ 1858 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1859 \ 1860 oop o = JNIHandles::resolve_non_null(obj); \ 1861 Klass* k = o->klass(); \ 1862 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1863 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1864 if (JvmtiExport::should_post_field_access()) { \ 1865 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \ 1866 } \ 1867 ret = o->Fieldname##_field(offset); \ 1868 return ret; \ 1869 JNI_END 1870 1871 DEFINE_GETFIELD(jboolean, bool, Boolean 1872 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1873 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1874 DEFINE_GETFIELD(jbyte, byte, Byte 1875 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1876 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1877 DEFINE_GETFIELD(jchar, char, Char 1878 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1879 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1880 DEFINE_GETFIELD(jshort, short, Short 1881 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1882 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1883 DEFINE_GETFIELD(jint, int, Int 1884 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1885 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1886 DEFINE_GETFIELD(jlong, long, Long 1887 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1888 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1889 // Float and double probes don't return value because dtrace doesn't currently support it 1890 DEFINE_GETFIELD(jfloat, float, Float 1891 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1892 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1893 DEFINE_GETFIELD(jdouble, double, Double 1894 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1895 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1896 1897 address jni_GetBooleanField_addr() { 1898 return (address)jni_GetBooleanField; 1899 } 1900 address jni_GetByteField_addr() { 1901 return (address)jni_GetByteField; 1902 } 1903 address jni_GetCharField_addr() { 1904 return (address)jni_GetCharField; 1905 } 1906 address jni_GetShortField_addr() { 1907 return (address)jni_GetShortField; 1908 } 1909 address jni_GetIntField_addr() { 1910 return (address)jni_GetIntField; 1911 } 1912 address jni_GetLongField_addr() { 1913 return (address)jni_GetLongField; 1914 } 1915 address jni_GetFloatField_addr() { 1916 return (address)jni_GetFloatField; 1917 } 1918 address jni_GetDoubleField_addr() { 1919 return (address)jni_GetDoubleField; 1920 } 1921 1922 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1923 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 1924 oop o = JNIHandles::resolve_non_null(obj); 1925 Klass* k = o->klass(); 1926 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1927 // Keep JVMTI addition small and only check enabled flag here. 1928 if (JvmtiExport::should_post_field_modification()) { 1929 jvalue field_value; 1930 field_value.l = value; 1931 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 1932 } 1933 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) { 1934 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 1935 } else { 1936 assert(k->is_instance_klass(), "Only instances can have flat fields"); 1937 InstanceKlass* ik = InstanceKlass::cast(k); 1938 fieldDescriptor fd; 1939 ik->find_field_from_offset(offset, false, &fd); 1940 InstanceKlass* holder = fd.field_holder(); 1941 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1942 oop v = JNIHandles::resolve_non_null(value); 1943 vklass->write_flat_field(o, offset, v, CHECK); 1944 } 1945 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 1946 JNI_END 1947 1948 // TODO: make this a template 1949 1950 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 1951 , EntryProbe, ReturnProbe) \ 1952 \ 1953 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 1954 \ 1955 EntryProbe; \ 1956 \ 1957 oop o = JNIHandles::resolve_non_null(obj); \ 1958 Klass* k = o->klass(); \ 1959 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1960 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1961 if (JvmtiExport::should_post_field_modification()) { \ 1962 jvalue field_value; \ 1963 field_value.unionType = value; \ 1964 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 1965 } \ 1966 o->Fieldname##_field_put(offset, value); \ 1967 ReturnProbe; \ 1968 JNI_END 1969 1970 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 1971 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1972 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 1973 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 1974 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1975 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 1976 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 1977 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1978 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 1979 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 1980 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1981 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 1982 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 1983 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1984 HOTSPOT_JNI_SETINTFIELD_RETURN()) 1985 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 1986 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1987 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 1988 // Float and double probes don't return value because dtrace doesn't currently support it 1989 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 1990 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1991 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 1992 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 1993 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1994 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 1995 1996 DT_RETURN_MARK_DECL(ToReflectedField, jobject 1997 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 1998 1999 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2000 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2001 jobject ret = nullptr; 2002 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2003 2004 fieldDescriptor fd; 2005 bool found = false; 2006 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2007 2008 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2009 2010 if (isStatic) { 2011 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2012 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2013 assert(id->is_static_field_id(), "invalid static field id"); 2014 found = id->find_local_field(&fd); 2015 } else { 2016 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2017 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2018 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2019 } 2020 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2021 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2022 ret = JNIHandles::make_local(THREAD, reflected); 2023 return ret; 2024 JNI_END 2025 2026 2027 // 2028 // Accessing Static Fields 2029 // 2030 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2031 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2032 2033 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2034 const char *name, const char *sig)) 2035 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2036 jfieldID ret = nullptr; 2037 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2038 2039 // The class should have been loaded (we have an instance of the class 2040 // passed in) so the field and signature should already be in the symbol 2041 // table. If they're not there, the field doesn't exist. 2042 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2043 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2044 if (fieldname == nullptr || signame == nullptr) { 2045 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2046 } 2047 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2048 // Make sure class is initialized before handing id's out to static fields 2049 k->initialize(CHECK_NULL); 2050 2051 fieldDescriptor fd; 2052 if (!k->is_instance_klass() || 2053 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2054 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2055 } 2056 2057 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2058 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2059 debug_only(id->set_is_static_field_id();) 2060 2061 debug_only(id->verify(fd.field_holder())); 2062 2063 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2064 return ret; 2065 JNI_END 2066 2067 2068 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2069 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2070 #if INCLUDE_JNI_CHECK 2071 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2072 #endif // INCLUDE_JNI_CHECK 2073 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2074 assert(id->is_static_field_id(), "invalid static field id"); 2075 // Keep JVMTI addition small and only check enabled flag here. 2076 // jni_GetField_probe() assumes that is okay to create handles. 2077 if (JvmtiExport::should_post_field_access()) { 2078 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); 2079 } 2080 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2081 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2082 return ret; 2083 JNI_END 2084 2085 2086 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2087 , EntryProbe, ReturnProbe) \ 2088 \ 2089 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2090 , ReturnProbe); \ 2091 \ 2092 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2093 EntryProbe; \ 2094 Return ret = 0;\ 2095 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2096 (const Return&)ret);\ 2097 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2098 assert(id->is_static_field_id(), "invalid static field id"); \ 2099 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2100 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2101 if (JvmtiExport::should_post_field_access()) { \ 2102 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \ 2103 } \ 2104 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2105 return ret;\ 2106 JNI_END 2107 2108 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2109 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2110 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2111 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2112 DEFINE_GETSTATICFIELD(jchar, char, Char 2113 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2114 DEFINE_GETSTATICFIELD(jshort, short, Short 2115 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2116 DEFINE_GETSTATICFIELD(jint, int, Int 2117 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2118 DEFINE_GETSTATICFIELD(jlong, long, Long 2119 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2120 // Float and double probes don't return value because dtrace doesn't currently support it 2121 DEFINE_GETSTATICFIELD(jfloat, float, Float 2122 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2123 DEFINE_GETSTATICFIELD(jdouble, double, Double 2124 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2125 2126 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2127 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2128 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2129 assert(id->is_static_field_id(), "invalid static field id"); 2130 // Keep JVMTI addition small and only check enabled flag here. 2131 // jni_SetField_probe() assumes that is okay to create handles. 2132 if (JvmtiExport::should_post_field_modification()) { 2133 jvalue field_value; 2134 field_value.l = value; 2135 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2136 } 2137 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2138 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2139 JNI_END 2140 2141 2142 2143 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2144 , EntryProbe, ReturnProbe) \ 2145 \ 2146 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2147 EntryProbe; \ 2148 \ 2149 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2150 assert(id->is_static_field_id(), "invalid static field id"); \ 2151 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2152 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2153 if (JvmtiExport::should_post_field_modification()) { \ 2154 jvalue field_value; \ 2155 field_value.unionType = value; \ 2156 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2157 } \ 2158 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2159 ReturnProbe;\ 2160 JNI_END 2161 2162 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2163 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2164 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2165 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2166 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2167 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2168 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2169 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2170 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2171 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2172 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2173 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2174 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2175 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2176 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2177 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2178 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2179 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2180 // Float and double probes don't return value because dtrace doesn't currently support it 2181 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2182 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2183 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2184 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2185 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2186 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2187 2188 // 2189 // String Operations 2190 // 2191 2192 // Unicode Interface 2193 2194 DT_RETURN_MARK_DECL(NewString, jstring 2195 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2196 2197 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2198 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2199 jstring ret = nullptr; 2200 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2201 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2202 ret = (jstring) JNIHandles::make_local(THREAD, string); 2203 return ret; 2204 JNI_END 2205 2206 2207 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2208 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2209 jsize ret = 0; 2210 oop s = JNIHandles::resolve_non_null(string); 2211 ret = java_lang_String::length(s); 2212 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2213 return ret; 2214 JNI_END 2215 2216 2217 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2218 JNIEnv *env, jstring string, jboolean *isCopy)) 2219 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2220 jchar* buf = nullptr; 2221 oop s = JNIHandles::resolve_non_null(string); 2222 typeArrayOop s_value = java_lang_String::value(s); 2223 if (s_value != nullptr) { 2224 int s_len = java_lang_String::length(s, s_value); 2225 bool is_latin1 = java_lang_String::is_latin1(s); 2226 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2227 /* JNI Specification states return null on OOM */ 2228 if (buf != nullptr) { 2229 if (s_len > 0) { 2230 if (!is_latin1) { 2231 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2232 buf, s_len); 2233 } else { 2234 for (int i = 0; i < s_len; i++) { 2235 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2236 } 2237 } 2238 } 2239 buf[s_len] = 0; 2240 //%note jni_5 2241 if (isCopy != nullptr) { 2242 *isCopy = JNI_TRUE; 2243 } 2244 } 2245 } 2246 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2247 return buf; 2248 JNI_END 2249 2250 2251 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2252 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2253 //%note jni_6 2254 if (chars != nullptr) { 2255 // Since String objects are supposed to be immutable, don't copy any 2256 // new data back. A bad user will have to go after the char array. 2257 FreeHeap((void*) chars); 2258 } 2259 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2260 JNI_END 2261 2262 2263 // UTF Interface 2264 2265 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2266 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2267 2268 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2269 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2270 jstring ret; 2271 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2272 2273 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2274 ret = (jstring) JNIHandles::make_local(THREAD, result); 2275 return ret; 2276 JNI_END 2277 2278 2279 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2280 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2281 oop java_string = JNIHandles::resolve_non_null(string); 2282 jsize ret = java_lang_String::utf8_length_as_int(java_string); 2283 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2284 return ret; 2285 JNI_END 2286 2287 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string)) 2288 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string); 2289 oop java_string = JNIHandles::resolve_non_null(string); 2290 size_t ret = java_lang_String::utf8_length(java_string); 2291 HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret); 2292 return checked_cast<jlong>(ret); 2293 JNI_END 2294 2295 2296 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2297 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2298 char* result = nullptr; 2299 oop java_string = JNIHandles::resolve_non_null(string); 2300 typeArrayOop s_value = java_lang_String::value(java_string); 2301 if (s_value != nullptr) { 2302 size_t length = java_lang_String::utf8_length(java_string, s_value); 2303 // JNI Specification states return null on OOM. 2304 // The resulting sequence doesn't have to be NUL-terminated but we do. 2305 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL); 2306 if (result != nullptr) { 2307 java_lang_String::as_utf8_string(java_string, s_value, result, length + 1); 2308 if (isCopy != nullptr) { 2309 *isCopy = JNI_TRUE; 2310 } 2311 } 2312 } 2313 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2314 return result; 2315 JNI_END 2316 2317 2318 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2319 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2320 if (chars != nullptr) { 2321 FreeHeap((char*) chars); 2322 } 2323 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2324 JNI_END 2325 2326 2327 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2328 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2329 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2330 assert(a->is_array(), "must be array"); 2331 jsize ret = a->length(); 2332 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2333 return ret; 2334 JNI_END 2335 2336 2337 // 2338 // Object Array Operations 2339 // 2340 2341 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2342 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2343 2344 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2345 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2346 jobjectArray ret = nullptr; 2347 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2348 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2349 Klass* ak = ek->array_klass(CHECK_NULL); 2350 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2351 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2352 oop initial_value = JNIHandles::resolve(initialElement); 2353 if (initial_value != nullptr) { // array already initialized with null 2354 for (int index = 0; index < length; index++) { 2355 result->obj_at_put(index, initial_value); 2356 } 2357 } 2358 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2359 return ret; 2360 JNI_END 2361 2362 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2363 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2364 2365 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2366 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2367 jobject ret = nullptr; 2368 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2369 oop res = nullptr; 2370 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2371 if (arr->is_within_bounds(index)) { 2372 if (arr->is_flatArray()) { 2373 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2374 flatArrayHandle vah(thread, a); 2375 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL); 2376 assert(res != nullptr, "Must be set in one of two paths above"); 2377 } else { 2378 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2379 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2380 res = a->obj_at(index); 2381 } 2382 } else { 2383 ResourceMark rm(THREAD); 2384 stringStream ss; 2385 ss.print("Index %d out of bounds for length %d", index,arr->length()); 2386 THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2387 } 2388 ret = JNIHandles::make_local(THREAD, res); 2389 return ret; 2390 JNI_END 2391 2392 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2393 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2394 2395 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2396 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2397 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2398 2399 bool oob = false; 2400 int length = -1; 2401 oop res = nullptr; 2402 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2403 if (arr->is_within_bounds(index)) { 2404 if (arr->is_flatArray()) { 2405 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2406 oop v = JNIHandles::resolve(value); 2407 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass()); 2408 InlineKlass* element_vklass = vaklass->element_klass(); 2409 if (v != nullptr && v->is_a(element_vklass)) { 2410 a->value_copy_to_index(v, index); 2411 } else { 2412 ResourceMark rm(THREAD); 2413 stringStream ss; 2414 Klass *kl = FlatArrayKlass::cast(a->klass()); 2415 ss.print("type mismatch: can not store %s to %s[%d]", 2416 v->klass()->external_name(), 2417 kl->external_name(), 2418 index); 2419 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2420 ss.print("[]"); 2421 } 2422 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2423 } 2424 } else { 2425 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2426 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2427 oop v = JNIHandles::resolve(value); 2428 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2429 a->obj_at_put(index, v); 2430 } else { 2431 ResourceMark rm(THREAD); 2432 stringStream ss; 2433 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2434 ss.print("type mismatch: can not store %s to %s[%d]", 2435 v->klass()->external_name(), 2436 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2437 index); 2438 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2439 ss.print("[]"); 2440 } 2441 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2442 } 2443 } 2444 } else { 2445 ResourceMark rm(THREAD); 2446 stringStream ss; 2447 ss.print("Index %d out of bounds for length %d", index, arr->length()); 2448 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2449 } 2450 JNI_END 2451 2452 2453 2454 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2455 ,EntryProbe,ReturnProbe) \ 2456 \ 2457 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2458 , ReturnProbe); \ 2459 \ 2460 JNI_ENTRY(Return, \ 2461 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2462 EntryProbe; \ 2463 Return ret = nullptr;\ 2464 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2465 \ 2466 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2467 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2468 return ret;\ 2469 JNI_END 2470 2471 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2472 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2473 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2474 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2475 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2476 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2477 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2478 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2479 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2480 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2481 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2482 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2483 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2484 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2485 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2486 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2487 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2488 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2489 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2490 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2491 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2492 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2493 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2494 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2495 2496 // Return an address which will fault if the caller writes to it. 2497 2498 static char* get_bad_address() { 2499 static char* bad_address = nullptr; 2500 if (bad_address == nullptr) { 2501 size_t size = os::vm_allocation_granularity(); 2502 bad_address = os::reserve_memory(size); 2503 if (bad_address != nullptr) { 2504 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2505 /*is_committed*/false); 2506 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2507 } 2508 } 2509 return bad_address; 2510 } 2511 2512 2513 2514 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2515 , EntryProbe, ReturnProbe) \ 2516 \ 2517 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2518 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2519 EntryProbe; \ 2520 /* allocate an chunk of memory in c land */ \ 2521 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2522 ElementType* result; \ 2523 int len = a->length(); \ 2524 if (len == 0) { \ 2525 if (isCopy != nullptr) { \ 2526 *isCopy = JNI_FALSE; \ 2527 } \ 2528 /* Empty array: legal but useless, can't return null. \ 2529 * Return a pointer to something useless. \ 2530 * Avoid asserts in typeArrayOop. */ \ 2531 result = (ElementType*)get_bad_address(); \ 2532 } else { \ 2533 /* JNI Specification states return null on OOM */ \ 2534 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2535 if (result != nullptr) { \ 2536 /* copy the array to the c chunk */ \ 2537 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2538 result, len); \ 2539 if (isCopy) { \ 2540 *isCopy = JNI_TRUE; \ 2541 } \ 2542 } \ 2543 } \ 2544 ReturnProbe; \ 2545 return result; \ 2546 JNI_END 2547 2548 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2549 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2550 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2551 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2552 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2553 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2554 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2555 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2556 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2557 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2558 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2559 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2560 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2561 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2562 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2563 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2564 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2565 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2566 // Float and double probes don't return value because dtrace doesn't currently support it 2567 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2568 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2569 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2570 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2571 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2572 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2573 2574 2575 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2576 , EntryProbe, ReturnProbe);\ 2577 \ 2578 JNI_ENTRY_NO_PRESERVE(void, \ 2579 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2580 ElementType *buf, jint mode)) \ 2581 EntryProbe; \ 2582 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2583 int len = a->length(); \ 2584 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2585 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2586 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2587 } \ 2588 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2589 FreeHeap(buf); \ 2590 } \ 2591 } \ 2592 ReturnProbe; \ 2593 JNI_END 2594 2595 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2596 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2597 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2598 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2599 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2600 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2601 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2602 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2603 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2604 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2605 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2606 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2607 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2608 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2609 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2610 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2611 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2612 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2613 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2614 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2615 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2616 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2617 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2618 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2619 2620 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2621 ResourceMark rm(THREAD); 2622 if (copy_len < 0) { 2623 stringStream ss; 2624 ss.print("Length %d is negative", copy_len); 2625 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2626 } else if (start < 0 || (start > array_len - copy_len)) { 2627 stringStream ss; 2628 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2629 start, (int64_t)start+(int64_t)copy_len, array_len); 2630 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2631 } 2632 } 2633 2634 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2635 , EntryProbe, ReturnProbe); \ 2636 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2637 , ReturnProbe); \ 2638 \ 2639 JNI_ENTRY(void, \ 2640 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2641 jsize len, ElementType *buf)) \ 2642 EntryProbe; \ 2643 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2644 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2645 check_bounds(start, len, src->length(), CHECK); \ 2646 if (len > 0) { \ 2647 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2648 } \ 2649 JNI_END 2650 2651 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2652 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2653 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2654 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2655 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2656 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2657 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2658 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2659 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2660 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2661 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2662 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2663 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2664 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2665 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2666 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2667 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2668 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2669 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2670 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2671 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2672 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2673 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2674 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2675 2676 2677 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2678 , EntryProbe, ReturnProbe); \ 2679 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2680 ,ReturnProbe); \ 2681 \ 2682 JNI_ENTRY(void, \ 2683 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2684 jsize len, const ElementType *buf)) \ 2685 EntryProbe; \ 2686 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2687 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2688 check_bounds(start, len, dst->length(), CHECK); \ 2689 if (len > 0) { \ 2690 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2691 } \ 2692 JNI_END 2693 2694 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2695 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2696 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2697 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2698 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2699 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2700 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2701 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2702 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2703 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2704 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2705 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2706 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2707 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2708 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2709 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2710 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2711 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2712 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2713 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2714 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2715 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2716 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2717 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2718 2719 2720 DT_RETURN_MARK_DECL(RegisterNatives, jint 2721 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2722 2723 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2724 const JNINativeMethod *methods, 2725 jint nMethods)) 2726 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2727 jint ret = 0; 2728 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2729 2730 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2731 2732 // There are no restrictions on native code registering native methods, 2733 // which allows agents to redefine the bindings to native methods, however 2734 // we issue a warning if any code running outside of the boot/platform 2735 // loader is rebinding any native methods in classes loaded by the 2736 // boot/platform loader that are in named modules. That will catch changes 2737 // to platform classes while excluding classes added to the bootclasspath. 2738 bool do_warning = false; 2739 2740 // Only instanceKlasses can have native methods 2741 if (k->is_instance_klass()) { 2742 oop cl = k->class_loader(); 2743 InstanceKlass* ik = InstanceKlass::cast(k); 2744 // Check for a platform class 2745 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) && 2746 ik->module()->is_named()) { 2747 Klass* caller = thread->security_get_caller_class(1); 2748 // If no caller class, or caller class has a different loader, then 2749 // issue a warning below. 2750 do_warning = (caller == nullptr) || caller->class_loader() != cl; 2751 } 2752 } 2753 2754 2755 for (int index = 0; index < nMethods; index++) { 2756 const char* meth_name = methods[index].name; 2757 const char* meth_sig = methods[index].signature; 2758 int meth_name_len = (int)strlen(meth_name); 2759 2760 // The class should have been loaded (we have an instance of the class 2761 // passed in) so the method and signature should already be in the symbol 2762 // table. If they're not there, the method doesn't exist. 2763 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2764 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2765 2766 if (name == nullptr || signature == nullptr) { 2767 ResourceMark rm(THREAD); 2768 stringStream st; 2769 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2770 // Must return negative value on failure 2771 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2772 } 2773 2774 if (do_warning) { 2775 ResourceMark rm(THREAD); 2776 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2777 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2778 } 2779 2780 bool res = Method::register_native(k, name, signature, 2781 (address) methods[index].fnPtr, THREAD); 2782 if (!res) { 2783 ret = -1; 2784 break; 2785 } 2786 } 2787 return ret; 2788 JNI_END 2789 2790 2791 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2792 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2793 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2794 //%note jni_2 2795 if (k->is_instance_klass()) { 2796 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2797 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2798 if (m->is_native()) { 2799 m->clear_native_function(); 2800 m->set_signature_handler(nullptr); 2801 } 2802 } 2803 } 2804 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2805 return 0; 2806 JNI_END 2807 2808 // 2809 // Monitor functions 2810 // 2811 2812 DT_RETURN_MARK_DECL(MonitorEnter, jint 2813 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2814 2815 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2816 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2817 jint ret = JNI_ERR; 2818 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2819 2820 // If the object is null, we can't do anything with it 2821 if (jobj == nullptr) { 2822 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2823 } 2824 2825 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2826 ObjectSynchronizer::jni_enter(obj, thread); 2827 return JNI_OK; 2828 JNI_END 2829 2830 DT_RETURN_MARK_DECL(MonitorExit, jint 2831 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2832 2833 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2834 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2835 jint ret = JNI_ERR; 2836 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2837 2838 // Don't do anything with a null object 2839 if (jobj == nullptr) { 2840 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2841 } 2842 2843 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2844 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2845 return JNI_OK; 2846 JNI_END 2847 2848 // 2849 // Extensions 2850 // 2851 2852 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2853 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2854 2855 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2856 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2857 DT_VOID_RETURN_MARK(GetStringRegion); 2858 oop s = JNIHandles::resolve_non_null(string); 2859 typeArrayOop s_value = java_lang_String::value(s); 2860 int s_len = java_lang_String::length(s, s_value); 2861 if (start < 0 || len < 0 || start > s_len - len) { 2862 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2863 } else { 2864 if (len > 0) { 2865 bool is_latin1 = java_lang_String::is_latin1(s); 2866 if (!is_latin1) { 2867 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2868 buf, len); 2869 } else { 2870 for (int i = 0; i < len; i++) { 2871 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2872 } 2873 } 2874 } 2875 } 2876 JNI_END 2877 2878 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2879 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2880 2881 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2882 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2883 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2884 oop s = JNIHandles::resolve_non_null(string); 2885 typeArrayOop s_value = java_lang_String::value(s); 2886 int s_len = java_lang_String::length(s, s_value); 2887 if (start < 0 || len < 0 || start > s_len - len) { 2888 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2889 } else { 2890 //%note jni_7 2891 if (len > 0) { 2892 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2893 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2894 // as_utf8_string null-terminates the result string 2895 } else { 2896 // JDK null-terminates the buffer even in len is zero 2897 if (buf != nullptr) { 2898 buf[0] = 0; 2899 } 2900 } 2901 } 2902 JNI_END 2903 2904 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2905 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2906 Handle a(thread, JNIHandles::resolve_non_null(array)); 2907 assert(a->is_typeArray(), "just checking"); 2908 2909 // Pin object 2910 Universe::heap()->pin_object(thread, a()); 2911 2912 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 2913 void* ret = arrayOop(a())->base(type); 2914 if (isCopy != nullptr) { 2915 *isCopy = JNI_FALSE; 2916 } 2917 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2918 return ret; 2919 JNI_END 2920 2921 2922 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2923 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 2924 // Unpin object 2925 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array)); 2926 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 2927 JNI_END 2928 2929 2930 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 2931 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 2932 oop s = JNIHandles::resolve_non_null(string); 2933 jchar* ret; 2934 if (!java_lang_String::is_latin1(s)) { 2935 typeArrayHandle s_value(thread, java_lang_String::value(s)); 2936 2937 // Pin value array 2938 Universe::heap()->pin_object(thread, s_value()); 2939 2940 ret = (jchar*) s_value->base(T_CHAR); 2941 if (isCopy != nullptr) *isCopy = JNI_FALSE; 2942 } else { 2943 // Inflate latin1 encoded string to UTF16 2944 typeArrayOop s_value = java_lang_String::value(s); 2945 int s_len = java_lang_String::length(s, s_value); 2946 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2947 /* JNI Specification states return null on OOM */ 2948 if (ret != nullptr) { 2949 for (int i = 0; i < s_len; i++) { 2950 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2951 } 2952 ret[s_len] = 0; 2953 } 2954 if (isCopy != nullptr) *isCopy = JNI_TRUE; 2955 } 2956 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 2957 return ret; 2958 JNI_END 2959 2960 2961 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 2962 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 2963 oop s = JNIHandles::resolve_non_null(str); 2964 bool is_latin1 = java_lang_String::is_latin1(s); 2965 2966 if (is_latin1) { 2967 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 2968 // This assumes that ReleaseStringCritical bookends GetStringCritical. 2969 FREE_C_HEAP_ARRAY(jchar, chars); 2970 } else { 2971 // StringDedup can have replaced the value array, so don't fetch the array from 's'. 2972 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical. 2973 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR)); 2974 2975 // Unpin value array 2976 Universe::heap()->unpin_object(thread, value); 2977 } 2978 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 2979 JNI_END 2980 2981 2982 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 2983 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 2984 Handle ref_handle(thread, JNIHandles::resolve(ref)); 2985 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 2986 if (ret == nullptr && ref_handle.not_null()) { 2987 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr); 2988 } 2989 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 2990 return ret; 2991 JNI_END 2992 2993 // Must be JNI_ENTRY (with HandleMark) 2994 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 2995 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 2996 JNIHandles::destroy_weak_global(ref); 2997 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 2998 JNI_END 2999 3000 3001 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3002 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3003 jni_check_async_exceptions(thread); 3004 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3005 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3006 return ret; 3007 JNI_END 3008 3009 3010 // Initialization state for three routines below relating to 3011 // java.nio.DirectBuffers 3012 static int directBufferSupportInitializeStarted = 0; 3013 static volatile int directBufferSupportInitializeEnded = 0; 3014 static volatile int directBufferSupportInitializeFailed = 0; 3015 static jclass bufferClass = nullptr; 3016 static jclass directBufferClass = nullptr; 3017 static jclass directByteBufferClass = nullptr; 3018 static jmethodID directByteBufferConstructor = nullptr; 3019 static jfieldID directBufferAddressField = nullptr; 3020 static jfieldID bufferCapacityField = nullptr; 3021 3022 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3023 Handle loader; // null (bootstrap) loader 3024 Handle protection_domain; // null protection domain 3025 3026 TempNewSymbol sym = SymbolTable::new_symbol(name); 3027 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3028 3029 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 3030 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3031 } 3032 return result; 3033 } 3034 3035 // These lookups are done with the null (bootstrap) ClassLoader to 3036 // circumvent any security checks that would be done by jni_FindClass. 3037 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3038 { 3039 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; } 3040 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; } 3041 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; } 3042 return true; 3043 } 3044 JNI_END 3045 3046 3047 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3048 if (directBufferSupportInitializeFailed) { 3049 return false; 3050 } 3051 3052 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 3053 if (!lookupDirectBufferClasses(env)) { 3054 directBufferSupportInitializeFailed = 1; 3055 return false; 3056 } 3057 3058 // Make global references for these 3059 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3060 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3061 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3062 3063 // Global refs will be null if out-of-memory (no exception is pending) 3064 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) { 3065 directBufferSupportInitializeFailed = 1; 3066 return false; 3067 } 3068 3069 // Get needed field and method IDs 3070 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V"); 3071 if (env->ExceptionCheck()) { 3072 env->ExceptionClear(); 3073 directBufferSupportInitializeFailed = 1; 3074 return false; 3075 } 3076 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3077 if (env->ExceptionCheck()) { 3078 env->ExceptionClear(); 3079 directBufferSupportInitializeFailed = 1; 3080 return false; 3081 } 3082 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3083 if (env->ExceptionCheck()) { 3084 env->ExceptionClear(); 3085 directBufferSupportInitializeFailed = 1; 3086 return false; 3087 } 3088 3089 if ((directByteBufferConstructor == nullptr) || 3090 (directBufferAddressField == nullptr) || 3091 (bufferCapacityField == nullptr)) { 3092 directBufferSupportInitializeFailed = 1; 3093 return false; 3094 } 3095 3096 directBufferSupportInitializeEnded = 1; 3097 } else { 3098 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3099 os::naked_yield(); 3100 } 3101 } 3102 3103 return !directBufferSupportInitializeFailed; 3104 } 3105 3106 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3107 { 3108 // thread_from_jni_environment() will block if VM is gone. 3109 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3110 3111 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3112 3113 if (!directBufferSupportInitializeEnded) { 3114 if (!initializeDirectBufferSupport(env, thread)) { 3115 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr); 3116 return nullptr; 3117 } 3118 } 3119 3120 // Being paranoid about accidental sign extension on address 3121 jlong addr = (jlong) ((uintptr_t) address); 3122 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity); 3123 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3124 return ret; 3125 } 3126 3127 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3128 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3129 3130 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3131 { 3132 // thread_from_jni_environment() will block if VM is gone. 3133 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3134 3135 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3136 void* ret = nullptr; 3137 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3138 3139 if (!directBufferSupportInitializeEnded) { 3140 if (!initializeDirectBufferSupport(env, thread)) { 3141 return nullptr; 3142 } 3143 } 3144 3145 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) { 3146 return nullptr; 3147 } 3148 3149 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3150 return ret; 3151 } 3152 3153 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3154 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3155 3156 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3157 { 3158 // thread_from_jni_environment() will block if VM is gone. 3159 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3160 3161 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3162 jlong ret = -1; 3163 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3164 3165 if (!directBufferSupportInitializeEnded) { 3166 if (!initializeDirectBufferSupport(env, thread)) { 3167 ret = 0; 3168 return ret; 3169 } 3170 } 3171 3172 if (buf == nullptr) { 3173 return -1; 3174 } 3175 3176 if (!env->IsInstanceOf(buf, directBufferClass)) { 3177 return -1; 3178 } 3179 3180 // NOTE that capacity is currently an int in the implementation 3181 ret = env->GetIntField(buf, bufferCapacityField); 3182 return ret; 3183 } 3184 3185 3186 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3187 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3188 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3189 return CurrentVersion; 3190 JNI_END 3191 3192 extern struct JavaVM_ main_vm; 3193 3194 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3195 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3196 *vm = (JavaVM *)(&main_vm); 3197 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3198 return JNI_OK; 3199 JNI_END 3200 3201 3202 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3203 return Modules::get_module(clazz, THREAD); 3204 JNI_END 3205 3206 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj)) 3207 oop thread_obj = JNIHandles::resolve_external_guard(obj); 3208 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) { 3209 return JNI_TRUE; 3210 } else { 3211 return JNI_FALSE; 3212 } 3213 JNI_END 3214 3215 3216 // Structure containing all jni functions 3217 struct JNINativeInterface_ jni_NativeInterface = { 3218 nullptr, 3219 nullptr, 3220 nullptr, 3221 3222 nullptr, 3223 3224 jni_GetVersion, 3225 3226 jni_DefineClass, 3227 jni_FindClass, 3228 3229 jni_FromReflectedMethod, 3230 jni_FromReflectedField, 3231 3232 jni_ToReflectedMethod, 3233 3234 jni_GetSuperclass, 3235 jni_IsAssignableFrom, 3236 3237 jni_ToReflectedField, 3238 3239 jni_Throw, 3240 jni_ThrowNew, 3241 jni_ExceptionOccurred, 3242 jni_ExceptionDescribe, 3243 jni_ExceptionClear, 3244 jni_FatalError, 3245 3246 jni_PushLocalFrame, 3247 jni_PopLocalFrame, 3248 3249 jni_NewGlobalRef, 3250 jni_DeleteGlobalRef, 3251 jni_DeleteLocalRef, 3252 jni_IsSameObject, 3253 3254 jni_NewLocalRef, 3255 jni_EnsureLocalCapacity, 3256 3257 jni_AllocObject, 3258 jni_NewObject, 3259 jni_NewObjectV, 3260 jni_NewObjectA, 3261 3262 jni_GetObjectClass, 3263 jni_IsInstanceOf, 3264 3265 jni_GetMethodID, 3266 3267 jni_CallObjectMethod, 3268 jni_CallObjectMethodV, 3269 jni_CallObjectMethodA, 3270 jni_CallBooleanMethod, 3271 jni_CallBooleanMethodV, 3272 jni_CallBooleanMethodA, 3273 jni_CallByteMethod, 3274 jni_CallByteMethodV, 3275 jni_CallByteMethodA, 3276 jni_CallCharMethod, 3277 jni_CallCharMethodV, 3278 jni_CallCharMethodA, 3279 jni_CallShortMethod, 3280 jni_CallShortMethodV, 3281 jni_CallShortMethodA, 3282 jni_CallIntMethod, 3283 jni_CallIntMethodV, 3284 jni_CallIntMethodA, 3285 jni_CallLongMethod, 3286 jni_CallLongMethodV, 3287 jni_CallLongMethodA, 3288 jni_CallFloatMethod, 3289 jni_CallFloatMethodV, 3290 jni_CallFloatMethodA, 3291 jni_CallDoubleMethod, 3292 jni_CallDoubleMethodV, 3293 jni_CallDoubleMethodA, 3294 jni_CallVoidMethod, 3295 jni_CallVoidMethodV, 3296 jni_CallVoidMethodA, 3297 3298 jni_CallNonvirtualObjectMethod, 3299 jni_CallNonvirtualObjectMethodV, 3300 jni_CallNonvirtualObjectMethodA, 3301 jni_CallNonvirtualBooleanMethod, 3302 jni_CallNonvirtualBooleanMethodV, 3303 jni_CallNonvirtualBooleanMethodA, 3304 jni_CallNonvirtualByteMethod, 3305 jni_CallNonvirtualByteMethodV, 3306 jni_CallNonvirtualByteMethodA, 3307 jni_CallNonvirtualCharMethod, 3308 jni_CallNonvirtualCharMethodV, 3309 jni_CallNonvirtualCharMethodA, 3310 jni_CallNonvirtualShortMethod, 3311 jni_CallNonvirtualShortMethodV, 3312 jni_CallNonvirtualShortMethodA, 3313 jni_CallNonvirtualIntMethod, 3314 jni_CallNonvirtualIntMethodV, 3315 jni_CallNonvirtualIntMethodA, 3316 jni_CallNonvirtualLongMethod, 3317 jni_CallNonvirtualLongMethodV, 3318 jni_CallNonvirtualLongMethodA, 3319 jni_CallNonvirtualFloatMethod, 3320 jni_CallNonvirtualFloatMethodV, 3321 jni_CallNonvirtualFloatMethodA, 3322 jni_CallNonvirtualDoubleMethod, 3323 jni_CallNonvirtualDoubleMethodV, 3324 jni_CallNonvirtualDoubleMethodA, 3325 jni_CallNonvirtualVoidMethod, 3326 jni_CallNonvirtualVoidMethodV, 3327 jni_CallNonvirtualVoidMethodA, 3328 3329 jni_GetFieldID, 3330 3331 jni_GetObjectField, 3332 jni_GetBooleanField, 3333 jni_GetByteField, 3334 jni_GetCharField, 3335 jni_GetShortField, 3336 jni_GetIntField, 3337 jni_GetLongField, 3338 jni_GetFloatField, 3339 jni_GetDoubleField, 3340 3341 jni_SetObjectField, 3342 jni_SetBooleanField, 3343 jni_SetByteField, 3344 jni_SetCharField, 3345 jni_SetShortField, 3346 jni_SetIntField, 3347 jni_SetLongField, 3348 jni_SetFloatField, 3349 jni_SetDoubleField, 3350 3351 jni_GetStaticMethodID, 3352 3353 jni_CallStaticObjectMethod, 3354 jni_CallStaticObjectMethodV, 3355 jni_CallStaticObjectMethodA, 3356 jni_CallStaticBooleanMethod, 3357 jni_CallStaticBooleanMethodV, 3358 jni_CallStaticBooleanMethodA, 3359 jni_CallStaticByteMethod, 3360 jni_CallStaticByteMethodV, 3361 jni_CallStaticByteMethodA, 3362 jni_CallStaticCharMethod, 3363 jni_CallStaticCharMethodV, 3364 jni_CallStaticCharMethodA, 3365 jni_CallStaticShortMethod, 3366 jni_CallStaticShortMethodV, 3367 jni_CallStaticShortMethodA, 3368 jni_CallStaticIntMethod, 3369 jni_CallStaticIntMethodV, 3370 jni_CallStaticIntMethodA, 3371 jni_CallStaticLongMethod, 3372 jni_CallStaticLongMethodV, 3373 jni_CallStaticLongMethodA, 3374 jni_CallStaticFloatMethod, 3375 jni_CallStaticFloatMethodV, 3376 jni_CallStaticFloatMethodA, 3377 jni_CallStaticDoubleMethod, 3378 jni_CallStaticDoubleMethodV, 3379 jni_CallStaticDoubleMethodA, 3380 jni_CallStaticVoidMethod, 3381 jni_CallStaticVoidMethodV, 3382 jni_CallStaticVoidMethodA, 3383 3384 jni_GetStaticFieldID, 3385 3386 jni_GetStaticObjectField, 3387 jni_GetStaticBooleanField, 3388 jni_GetStaticByteField, 3389 jni_GetStaticCharField, 3390 jni_GetStaticShortField, 3391 jni_GetStaticIntField, 3392 jni_GetStaticLongField, 3393 jni_GetStaticFloatField, 3394 jni_GetStaticDoubleField, 3395 3396 jni_SetStaticObjectField, 3397 jni_SetStaticBooleanField, 3398 jni_SetStaticByteField, 3399 jni_SetStaticCharField, 3400 jni_SetStaticShortField, 3401 jni_SetStaticIntField, 3402 jni_SetStaticLongField, 3403 jni_SetStaticFloatField, 3404 jni_SetStaticDoubleField, 3405 3406 jni_NewString, 3407 jni_GetStringLength, 3408 jni_GetStringChars, 3409 jni_ReleaseStringChars, 3410 3411 jni_NewStringUTF, 3412 jni_GetStringUTFLength, 3413 jni_GetStringUTFChars, 3414 jni_ReleaseStringUTFChars, 3415 3416 jni_GetArrayLength, 3417 3418 jni_NewObjectArray, 3419 jni_GetObjectArrayElement, 3420 jni_SetObjectArrayElement, 3421 3422 jni_NewBooleanArray, 3423 jni_NewByteArray, 3424 jni_NewCharArray, 3425 jni_NewShortArray, 3426 jni_NewIntArray, 3427 jni_NewLongArray, 3428 jni_NewFloatArray, 3429 jni_NewDoubleArray, 3430 3431 jni_GetBooleanArrayElements, 3432 jni_GetByteArrayElements, 3433 jni_GetCharArrayElements, 3434 jni_GetShortArrayElements, 3435 jni_GetIntArrayElements, 3436 jni_GetLongArrayElements, 3437 jni_GetFloatArrayElements, 3438 jni_GetDoubleArrayElements, 3439 3440 jni_ReleaseBooleanArrayElements, 3441 jni_ReleaseByteArrayElements, 3442 jni_ReleaseCharArrayElements, 3443 jni_ReleaseShortArrayElements, 3444 jni_ReleaseIntArrayElements, 3445 jni_ReleaseLongArrayElements, 3446 jni_ReleaseFloatArrayElements, 3447 jni_ReleaseDoubleArrayElements, 3448 3449 jni_GetBooleanArrayRegion, 3450 jni_GetByteArrayRegion, 3451 jni_GetCharArrayRegion, 3452 jni_GetShortArrayRegion, 3453 jni_GetIntArrayRegion, 3454 jni_GetLongArrayRegion, 3455 jni_GetFloatArrayRegion, 3456 jni_GetDoubleArrayRegion, 3457 3458 jni_SetBooleanArrayRegion, 3459 jni_SetByteArrayRegion, 3460 jni_SetCharArrayRegion, 3461 jni_SetShortArrayRegion, 3462 jni_SetIntArrayRegion, 3463 jni_SetLongArrayRegion, 3464 jni_SetFloatArrayRegion, 3465 jni_SetDoubleArrayRegion, 3466 3467 jni_RegisterNatives, 3468 jni_UnregisterNatives, 3469 3470 jni_MonitorEnter, 3471 jni_MonitorExit, 3472 3473 jni_GetJavaVM, 3474 3475 jni_GetStringRegion, 3476 jni_GetStringUTFRegion, 3477 3478 jni_GetPrimitiveArrayCritical, 3479 jni_ReleasePrimitiveArrayCritical, 3480 3481 jni_GetStringCritical, 3482 jni_ReleaseStringCritical, 3483 3484 jni_NewWeakGlobalRef, 3485 jni_DeleteWeakGlobalRef, 3486 3487 jni_ExceptionCheck, 3488 3489 jni_NewDirectByteBuffer, 3490 jni_GetDirectBufferAddress, 3491 jni_GetDirectBufferCapacity, 3492 3493 // New 1_6 features 3494 3495 jni_GetObjectRefType, 3496 3497 // Module features 3498 3499 jni_GetModule, 3500 3501 // Virtual threads 3502 3503 jni_IsVirtualThread, 3504 3505 // Large UTF8 support 3506 3507 jni_GetStringUTFLengthAsLong 3508 }; 3509 3510 3511 // For jvmti use to modify jni function table. 3512 // Java threads in native contiues to run until it is transitioned 3513 // to VM at safepoint. Before the transition or before it is blocked 3514 // for safepoint it may access jni function table. VM could crash if 3515 // any java thread access the jni function table in the middle of memcpy. 3516 // To avoid this each function pointers are copied automically. 3517 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3518 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3519 intptr_t *a = (intptr_t *) jni_functions(); 3520 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3521 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3522 Atomic::store(a++, *b++); 3523 } 3524 } 3525 3526 void quicken_jni_functions() { 3527 // Replace Get<Primitive>Field with fast versions 3528 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) { 3529 address func; 3530 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3531 if (func != (address)-1) { 3532 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3533 } 3534 func = JNI_FastGetField::generate_fast_get_byte_field(); 3535 if (func != (address)-1) { 3536 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3537 } 3538 func = JNI_FastGetField::generate_fast_get_char_field(); 3539 if (func != (address)-1) { 3540 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3541 } 3542 func = JNI_FastGetField::generate_fast_get_short_field(); 3543 if (func != (address)-1) { 3544 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3545 } 3546 func = JNI_FastGetField::generate_fast_get_int_field(); 3547 if (func != (address)-1) { 3548 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3549 } 3550 func = JNI_FastGetField::generate_fast_get_long_field(); 3551 if (func != (address)-1) { 3552 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3553 } 3554 func = JNI_FastGetField::generate_fast_get_float_field(); 3555 if (func != (address)-1) { 3556 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3557 } 3558 func = JNI_FastGetField::generate_fast_get_double_field(); 3559 if (func != (address)-1) { 3560 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3561 } 3562 } 3563 } 3564 3565 // Returns the function structure 3566 struct JNINativeInterface_* jni_functions() { 3567 #if INCLUDE_JNI_CHECK 3568 if (CheckJNICalls) return jni_functions_check(); 3569 #endif // INCLUDE_JNI_CHECK 3570 return &jni_NativeInterface; 3571 } 3572 3573 // Returns the function structure 3574 struct JNINativeInterface_* jni_functions_nocheck() { 3575 return &jni_NativeInterface; 3576 } 3577 3578 3579 // Invocation API 3580 3581 3582 // Forward declaration 3583 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3584 3585 // Global invocation API vars 3586 enum VM_Creation_State { 3587 NOT_CREATED = 0, 3588 IN_PROGRESS, // Most JNI operations are permitted during this phase to 3589 // allow for initialization actions by libraries and agents. 3590 COMPLETE 3591 }; 3592 3593 volatile VM_Creation_State vm_created = NOT_CREATED; 3594 3595 // Indicate whether it is safe to recreate VM. Recreation is only 3596 // possible after a failed initial creation attempt in some cases. 3597 volatile int safe_to_recreate_vm = 1; 3598 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3599 3600 3601 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3602 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3603 3604 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3605 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3606 3607 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3608 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3609 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3610 jint ret = JNI_ERR; 3611 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3612 3613 if (Threads::is_supported_jni_version(args->version)) { 3614 ret = JNI_OK; 3615 } 3616 // 1.1 style no longer supported in hotspot. 3617 // According the JNI spec, we should update args->version on return. 3618 // We also use the structure to communicate with launcher about default 3619 // stack size. 3620 if (args->version == JNI_VERSION_1_1) { 3621 args->version = JNI_VERSION_1_2; 3622 // javaStackSize is int in arguments structure 3623 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3624 args->javaStackSize = (jint)(ThreadStackSize * K); 3625 } 3626 return ret; 3627 } 3628 3629 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3630 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3631 3632 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3633 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3634 3635 jint result = JNI_ERR; 3636 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3637 3638 // We're about to use Atomic::xchg for synchronization. Some Zero 3639 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3640 // but __sync_lock_test_and_set is not guaranteed to do what we want 3641 // on all architectures. So we check it works before relying on it. 3642 #if defined(ZERO) && defined(ASSERT) 3643 { 3644 jint a = 0xcafebabe; 3645 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3646 void *c = &a; 3647 void *d = Atomic::xchg(&c, &b); 3648 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3649 assert(c == &b && d == &a, "Atomic::xchg() works"); 3650 } 3651 #endif // ZERO && ASSERT 3652 3653 // At the moment it's only possible to have one Java VM, 3654 // since some of the runtime state is in global variables. 3655 3656 // We cannot use our mutex locks here, since they only work on 3657 // Threads. We do an atomic compare and exchange to ensure only 3658 // one thread can call this method at a time 3659 3660 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3661 // the add/dec implementations are dependent on whether we are running 3662 // on a multiprocessor Atomic::xchg does not have this problem. 3663 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) { 3664 return JNI_EEXIST; // already created, or create attempt in progress 3665 } 3666 3667 // If a previous creation attempt failed but can be retried safely, 3668 // then safe_to_recreate_vm will have been reset to 1 after being 3669 // cleared here. If a previous creation attempt succeeded and we then 3670 // destroyed that VM, we will be prevented from trying to recreate 3671 // the VM in the same process, as the value will still be 0. 3672 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3673 return JNI_ERR; 3674 } 3675 3676 /** 3677 * Certain errors during initialization are recoverable and do not 3678 * prevent this method from being called again at a later time 3679 * (perhaps with different arguments). However, at a certain 3680 * point during initialization if an error occurs we cannot allow 3681 * this function to be called again (or it will crash). In those 3682 * situations, the 'canTryAgain' flag is set to false, which atomically 3683 * sets safe_to_recreate_vm to 1, such that any new call to 3684 * JNI_CreateJavaVM will immediately fail using the above logic. 3685 */ 3686 bool can_try_again = true; 3687 3688 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3689 if (result == JNI_OK) { 3690 JavaThread *thread = JavaThread::current(); 3691 assert(!thread->has_pending_exception(), "should have returned not OK"); 3692 // thread is thread_in_vm here 3693 *vm = (JavaVM *)(&main_vm); 3694 *(JNIEnv**)penv = thread->jni_environment(); 3695 // mark creation complete for other JNI ops 3696 Atomic::release_store(&vm_created, COMPLETE); 3697 3698 #if INCLUDE_JVMCI 3699 if (EnableJVMCI) { 3700 if (UseJVMCICompiler) { 3701 // JVMCI is initialized on a CompilerThread 3702 if (BootstrapJVMCI) { 3703 JavaThread* THREAD = thread; // For exception macros. 3704 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3705 compiler->bootstrap(THREAD); 3706 if (HAS_PENDING_EXCEPTION) { 3707 HandleMark hm(THREAD); 3708 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3709 } 3710 } 3711 } 3712 } 3713 #endif 3714 3715 // Notify JVMTI 3716 if (JvmtiExport::should_post_thread_life()) { 3717 JvmtiExport::post_thread_start(thread); 3718 } 3719 3720 JFR_ONLY(Jfr::on_thread_start(thread);) 3721 3722 if (ReplayCompiles) ciReplay::replay(thread); 3723 3724 #ifdef ASSERT 3725 // Some platforms (like Win*) need a wrapper around these test 3726 // functions in order to properly handle error conditions. 3727 if (ErrorHandlerTest != 0) { 3728 VMError::controlled_crash(ErrorHandlerTest); 3729 } 3730 #endif 3731 3732 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3733 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3734 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3735 } else { 3736 // If create_vm exits because of a pending exception, exit with that 3737 // exception. In the future when we figure out how to reclaim memory, 3738 // we may be able to exit with JNI_ERR and allow the calling application 3739 // to continue. 3740 if (Universe::is_fully_initialized()) { 3741 // otherwise no pending exception possible - VM will already have aborted 3742 Thread* current = Thread::current_or_null(); 3743 if (current != nullptr) { 3744 JavaThread* THREAD = JavaThread::cast(current); // For exception macros. 3745 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists"); 3746 HandleMark hm(THREAD); 3747 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3748 } 3749 } 3750 3751 if (can_try_again) { 3752 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3753 safe_to_recreate_vm = 1; 3754 } 3755 3756 // Creation failed. We must reset vm_created 3757 *vm = nullptr; 3758 *(JNIEnv**)penv = nullptr; 3759 // reset vm_created last to avoid race condition. Use OrderAccess to 3760 // control both compiler and architectural-based reordering. 3761 assert(vm_created == IN_PROGRESS, "must be"); 3762 Atomic::release_store(&vm_created, NOT_CREATED); 3763 } 3764 3765 // Flush stdout and stderr before exit. 3766 fflush(stdout); 3767 fflush(stderr); 3768 3769 return result; 3770 3771 } 3772 3773 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3774 jint result = JNI_ERR; 3775 // On Windows, let CreateJavaVM run with SEH protection 3776 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3777 __try { 3778 #endif 3779 result = JNI_CreateJavaVM_inner(vm, penv, args); 3780 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3781 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3782 // Nothing to do. 3783 } 3784 #endif 3785 return result; 3786 } 3787 3788 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3789 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3790 3791 if (vm_created == COMPLETE) { 3792 if (numVMs != nullptr) *numVMs = 1; 3793 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3794 } else { 3795 if (numVMs != nullptr) *numVMs = 0; 3796 } 3797 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3798 return JNI_OK; 3799 } 3800 3801 extern "C" { 3802 3803 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3804 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3805 3806 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3807 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3808 jint res = JNI_ERR; 3809 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3810 3811 if (vm_created == NOT_CREATED) { 3812 res = JNI_ERR; 3813 return res; 3814 } 3815 3816 JNIEnv *env; 3817 JavaVMAttachArgs destroyargs; 3818 destroyargs.version = CurrentVersion; 3819 destroyargs.name = (char *)"DestroyJavaVM"; 3820 destroyargs.group = nullptr; 3821 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3822 if (res != JNI_OK) { 3823 return res; 3824 } 3825 3826 JavaThread* thread = JavaThread::current(); 3827 3828 // Make sure we are actually in a newly attached thread, with no 3829 // existing Java frame. 3830 if (thread->has_last_Java_frame()) { 3831 return JNI_ERR; 3832 } 3833 3834 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3835 3836 // We are going to VM, change W^X state to the expected one. 3837 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite)); 3838 3839 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3840 Threads::destroy_vm(); 3841 // Don't bother restoring thread state, VM is gone. 3842 vm_created = NOT_CREATED; 3843 return JNI_OK; 3844 } 3845 3846 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3847 jint result = JNI_ERR; 3848 // On Windows, we need SEH protection 3849 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3850 __try { 3851 #endif 3852 result = jni_DestroyJavaVM_inner(vm); 3853 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3854 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3855 // Nothing to do. 3856 } 3857 #endif 3858 return result; 3859 } 3860 3861 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3862 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3863 3864 // Check below commented out from JDK1.2fcs as well 3865 /* 3866 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3867 return JNI_EVERSION; 3868 } 3869 */ 3870 3871 Thread* t = Thread::current_or_null(); 3872 if (t != nullptr) { 3873 // If executing from an atexit hook we may be in the VMThread. 3874 if (t->is_Java_thread()) { 3875 // If the thread has been attached this operation is a no-op 3876 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment(); 3877 return JNI_OK; 3878 } else { 3879 return JNI_ERR; 3880 } 3881 } 3882 3883 // Create a thread and mark it as attaching so it will be skipped by the 3884 // ThreadsListEnumerator - see CR 6404306 3885 JavaThread* thread = JavaThread::create_attaching_thread(); 3886 3887 // Set correct safepoint info. The thread is going to call into Java when 3888 // initializing the Java level thread object. Hence, the correct state must 3889 // be set in order for the Safepoint code to deal with it correctly. 3890 thread->set_thread_state(_thread_in_vm); 3891 thread->record_stack_base_and_size(); 3892 thread->register_thread_stack_with_NMT(); 3893 thread->initialize_thread_current(); 3894 MACOS_AARCH64_ONLY(thread->init_wx()); 3895 3896 if (!os::create_attached_thread(thread)) { 3897 thread->smr_delete(); 3898 return JNI_ERR; 3899 } 3900 // Enable stack overflow checks 3901 thread->stack_overflow_state()->create_stack_guard_pages(); 3902 3903 thread->initialize_tlab(); 3904 3905 thread->cache_global_variables(); 3906 3907 // This thread will not do a safepoint check, since it has 3908 // not been added to the Thread list yet. 3909 { MutexLocker ml(Threads_lock); 3910 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3911 // avoid this thread trying to do a GC before it is added to the thread-list 3912 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3913 Threads::add(thread, daemon); 3914 } 3915 // Create thread group and name info from attach arguments 3916 oop group = nullptr; 3917 char* thread_name = nullptr; 3918 if (args != nullptr && Threads::is_supported_jni_version(args->version)) { 3919 group = JNIHandles::resolve(args->group); 3920 thread_name = args->name; // may be null 3921 } 3922 if (group == nullptr) group = Universe::main_thread_group(); 3923 3924 // Create Java level thread object and attach it to this thread 3925 bool attach_failed = false; 3926 { 3927 EXCEPTION_MARK; 3928 HandleMark hm(THREAD); 3929 Handle thread_group(THREAD, group); 3930 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3931 if (HAS_PENDING_EXCEPTION) { 3932 CLEAR_PENDING_EXCEPTION; 3933 // cleanup outside the handle mark. 3934 attach_failed = true; 3935 } 3936 } 3937 3938 if (attach_failed) { 3939 // Added missing cleanup 3940 thread->cleanup_failed_attach_current_thread(daemon); 3941 return JNI_ERR; 3942 } 3943 3944 // mark the thread as no longer attaching 3945 // this uses a fence to push the change through so we don't have 3946 // to regrab the threads_lock 3947 thread->set_done_attaching_via_jni(); 3948 3949 // Set java thread status. 3950 java_lang_Thread::set_thread_status(thread->threadObj(), 3951 JavaThreadStatus::RUNNABLE); 3952 3953 // Notify the debugger 3954 if (JvmtiExport::should_post_thread_life()) { 3955 JvmtiExport::post_thread_start(thread); 3956 } 3957 3958 JFR_ONLY(Jfr::on_thread_start(thread);) 3959 3960 *(JNIEnv**)penv = thread->jni_environment(); 3961 3962 // Now leaving the VM, so change thread_state. This is normally automatically taken care 3963 // of in the JVM_ENTRY. But in this situation we have to do it manually. 3964 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3965 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3966 3967 // Perform any platform dependent FPU setup 3968 os::setup_fpu(); 3969 3970 return JNI_OK; 3971 } 3972 3973 3974 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 3975 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 3976 if (vm_created == NOT_CREATED) { 3977 // Not sure how we could possibly get here. 3978 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3979 return JNI_ERR; 3980 } 3981 3982 jint ret = attach_current_thread(vm, penv, _args, false); 3983 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 3984 return ret; 3985 } 3986 3987 3988 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 3989 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 3990 if (vm_created == NOT_CREATED) { 3991 // Not sure how we could possibly get here. 3992 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 3993 return JNI_ERR; 3994 } 3995 3996 Thread* current = Thread::current_or_null(); 3997 3998 // If the thread has already been detached the operation is a no-op 3999 if (current == nullptr) { 4000 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4001 return JNI_OK; 4002 } 4003 4004 // If executing from an atexit hook we may be in the VMThread. 4005 if (!current->is_Java_thread()) { 4006 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4007 return JNI_ERR; 4008 } 4009 4010 VM_Exit::block_if_vm_exited(); 4011 4012 JavaThread* thread = JavaThread::cast(current); 4013 if (thread->has_last_Java_frame()) { 4014 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4015 // Can't detach a thread that's running java, that can't work. 4016 return JNI_ERR; 4017 } 4018 4019 // We are going to VM, change W^X state to the expected one. 4020 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite)); 4021 4022 // Safepoint support. Have to do call-back to safepoint code, if in the 4023 // middle of a safepoint operation 4024 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4025 4026 // XXX: Note that JavaThread::exit() call below removes the guards on the 4027 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4028 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4029 // of the guards is visible in jni_AttachCurrentThread above, 4030 // the removal of the guards is buried below in JavaThread::exit() 4031 // here. The abstraction should be more symmetrically either exposed 4032 // or hidden (e.g. it could probably be hidden in the same 4033 // (platform-dependent) methods where we do alternate stack 4034 // maintenance work?) 4035 thread->exit(false, JavaThread::jni_detach); 4036 thread->smr_delete(); 4037 4038 // Go to the execute mode, the initial state of the thread on creation. 4039 // Use os interface as the thread is not a JavaThread anymore. 4040 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec)); 4041 4042 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4043 return JNI_OK; 4044 } 4045 4046 DT_RETURN_MARK_DECL(GetEnv, jint 4047 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4048 4049 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4050 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4051 jint ret = JNI_ERR; 4052 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4053 4054 if (vm_created == NOT_CREATED) { 4055 *penv = nullptr; 4056 ret = JNI_EDETACHED; 4057 return ret; 4058 } 4059 4060 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4061 return ret; 4062 } 4063 4064 #ifndef JVMPI_VERSION_1 4065 // need these in order to be polite about older agents 4066 #define JVMPI_VERSION_1 ((jint)0x10000001) 4067 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4068 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4069 #endif // !JVMPI_VERSION_1 4070 4071 Thread* thread = Thread::current_or_null(); 4072 if (thread != nullptr && thread->is_Java_thread()) { 4073 if (Threads::is_supported_jni_version_including_1_1(version)) { 4074 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment(); 4075 ret = JNI_OK; 4076 return ret; 4077 4078 } else if (version == JVMPI_VERSION_1 || 4079 version == JVMPI_VERSION_1_1 || 4080 version == JVMPI_VERSION_1_2) { 4081 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4082 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4083 ret = JNI_EVERSION; 4084 return ret; 4085 } else if (JvmtiExport::is_jvmdi_version(version)) { 4086 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4087 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4088 ret = JNI_EVERSION; 4089 return ret; 4090 } else { 4091 *penv = nullptr; 4092 ret = JNI_EVERSION; 4093 return ret; 4094 } 4095 } else { 4096 *penv = nullptr; 4097 ret = JNI_EDETACHED; 4098 return ret; 4099 } 4100 } 4101 4102 4103 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4104 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4105 if (vm_created == NOT_CREATED) { 4106 // Not sure how we could possibly get here. 4107 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4108 return JNI_ERR; 4109 } 4110 4111 jint ret = attach_current_thread(vm, penv, _args, true); 4112 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4113 return ret; 4114 } 4115 4116 4117 } // End extern "C" 4118 4119 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4120 nullptr, 4121 nullptr, 4122 nullptr, 4123 4124 jni_DestroyJavaVM, 4125 jni_AttachCurrentThread, 4126 jni_DetachCurrentThread, 4127 jni_GetEnv, 4128 jni_AttachCurrentThreadAsDaemon 4129 };