1 /* 2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 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_21; 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 methodHandle method(THREAD, selected_method); 938 939 // Create object to hold arguments for the JavaCall, and associate it with 940 // the jni parser 941 ResourceMark rm(THREAD); 942 JavaCallArguments java_args(number_of_parameters); 943 944 // handle arguments 945 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 946 java_args.push_oop(h_recv); // Push jobject handle 947 948 // Fill out JavaCallArguments object 949 args->push_arguments_on(&java_args); 950 // Initialize result type 951 result->set_type(args->return_type()); 952 953 // Invoke the method. Result is returned as oop. 954 JavaCalls::call(result, method, &java_args, CHECK); 955 956 // Convert result 957 if (is_reference_type(result->get_type())) { 958 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 959 } 960 } 961 962 DT_RETURN_MARK_DECL(AllocObject, jobject 963 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 964 965 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 966 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 967 968 jobject ret = nullptr; 969 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 970 971 oop clazzoop = JNIHandles::resolve_non_null(clazz); 972 Klass* k = java_lang_Class::as_Klass(clazzoop); 973 if (k == nullptr || k->is_inline_klass()) { 974 ResourceMark rm(THREAD); 975 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 976 } 977 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 978 ret = JNIHandles::make_local(THREAD, i); 979 return ret; 980 JNI_END 981 982 DT_RETURN_MARK_DECL(NewObjectA, jobject 983 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 984 985 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 986 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 987 988 jobject obj = nullptr; 989 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj); 990 991 oop clazzoop = JNIHandles::resolve_non_null(clazz); 992 Klass* k = java_lang_Class::as_Klass(clazzoop); 993 if (k == nullptr) { 994 ResourceMark rm(THREAD); 995 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 996 } 997 998 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 999 obj = JNIHandles::make_local(THREAD, i); 1000 JavaValue jvalue(T_VOID); 1001 JNI_ArgumentPusherArray ap(methodID, args); 1002 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1003 1004 return obj; 1005 JNI_END 1006 1007 1008 DT_RETURN_MARK_DECL(NewObjectV, jobject 1009 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1010 1011 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1012 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1013 1014 jobject obj = nullptr; 1015 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1016 1017 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1018 Klass* k = java_lang_Class::as_Klass(clazzoop); 1019 if (k == nullptr) { 1020 ResourceMark rm(THREAD); 1021 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1022 } 1023 1024 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1025 obj = JNIHandles::make_local(THREAD, i); 1026 JavaValue jvalue(T_VOID); 1027 JNI_ArgumentPusherVaArg ap(methodID, args); 1028 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1029 1030 return obj; 1031 JNI_END 1032 1033 1034 DT_RETURN_MARK_DECL(NewObject, jobject 1035 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1036 1037 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1038 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1039 1040 jobject obj = nullptr; 1041 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1042 1043 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1044 Klass* k = java_lang_Class::as_Klass(clazzoop); 1045 if (k == nullptr) { 1046 ResourceMark rm(THREAD); 1047 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1048 } 1049 1050 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1051 obj = JNIHandles::make_local(THREAD, i); 1052 va_list args; 1053 va_start(args, methodID); 1054 JavaValue jvalue(T_VOID); 1055 JNI_ArgumentPusherVaArg ap(methodID, args); 1056 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1057 va_end(args); 1058 1059 return obj; 1060 JNI_END 1061 1062 1063 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1064 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1065 1066 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1067 jclass ret = 1068 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1069 1070 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1071 return ret; 1072 JNI_END 1073 1074 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1075 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1076 1077 jboolean ret = JNI_TRUE; 1078 if (obj != nullptr) { 1079 ret = JNI_FALSE; 1080 Klass* k = java_lang_Class::as_Klass( 1081 JNIHandles::resolve_non_null(clazz)); 1082 if (k != nullptr) { 1083 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1084 } 1085 } 1086 1087 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1088 return ret; 1089 JNI_END 1090 1091 1092 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1093 const char *sig, bool is_static, TRAPS) { 1094 // %%%% This code should probably just call into a method in the LinkResolver 1095 // 1096 // The class should have been loaded (we have an instance of the class 1097 // passed in) so the method and signature should already be in the symbol 1098 // table. If they're not there, the method doesn't exist. 1099 const char *name_to_probe = (name_str == nullptr) 1100 ? vmSymbols::object_initializer_name()->as_C_string() 1101 : name_str; 1102 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1103 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1104 1105 if (name == nullptr || signature == nullptr) { 1106 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1107 } 1108 1109 oop mirror = JNIHandles::resolve_non_null(clazz); 1110 Klass* klass = java_lang_Class::as_Klass(mirror); 1111 1112 // Throw a NoSuchMethodError exception if we have an instance of a 1113 // primitive java.lang.Class 1114 if (java_lang_Class::is_primitive(mirror)) { 1115 ResourceMark rm(THREAD); 1116 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1117 } 1118 1119 // Make sure class is linked and initialized before handing id's out to 1120 // Method*s. 1121 klass->initialize(CHECK_NULL); 1122 1123 Method* m; 1124 if (name == vmSymbols::object_initializer_name() || 1125 name == vmSymbols::class_initializer_name()) { 1126 // Never search superclasses for constructors 1127 if (klass->is_instance_klass()) { 1128 m = InstanceKlass::cast(klass)->find_method(name, signature); 1129 } else { 1130 m = nullptr; 1131 } 1132 } else { 1133 m = klass->lookup_method(name, signature); 1134 if (m == nullptr && klass->is_instance_klass()) { 1135 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1136 } 1137 } 1138 if (m == nullptr || (m->is_static() != is_static)) { 1139 ResourceMark rm(THREAD); 1140 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1141 } 1142 return m->jmethod_id(); 1143 } 1144 1145 1146 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1147 const char *name, const char *sig)) 1148 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1149 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1150 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1151 return ret; 1152 JNI_END 1153 1154 1155 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1156 const char *name, const char *sig)) 1157 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1158 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1159 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1160 return ret; 1161 JNI_END 1162 1163 1164 1165 // 1166 // Calling Methods 1167 // 1168 1169 1170 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1171 , EntryProbe, ReturnProbe) \ 1172 \ 1173 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1174 , ReturnProbe); \ 1175 \ 1176 JNI_ENTRY(ResultType, \ 1177 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1178 \ 1179 EntryProbe; \ 1180 ResultType ret = 0;\ 1181 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1182 (const ResultType&)ret);\ 1183 \ 1184 va_list args; \ 1185 va_start(args, methodID); \ 1186 JavaValue jvalue(Tag); \ 1187 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1188 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1189 va_end(args); \ 1190 ret = jvalue.get_##ResultType(); \ 1191 return ret;\ 1192 JNI_END 1193 1194 // the runtime type of subword integral basic types is integer 1195 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1196 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1197 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1198 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1199 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1200 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1201 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1202 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1203 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1204 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1205 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1206 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1207 1208 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1209 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1210 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1211 DEFINE_CALLMETHOD(jint, Int, T_INT, 1212 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1213 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1214 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1215 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1216 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1217 // Float and double probes don't return value because dtrace doesn't currently support it 1218 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1219 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1220 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1221 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1222 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1223 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1224 1225 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1226 , EntryProbe, ReturnProbe) \ 1227 \ 1228 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1229 , ReturnProbe); \ 1230 \ 1231 JNI_ENTRY(ResultType, \ 1232 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1233 \ 1234 EntryProbe;\ 1235 ResultType ret = 0;\ 1236 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1237 (const ResultType&)ret);\ 1238 \ 1239 JavaValue jvalue(Tag); \ 1240 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1241 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1242 ret = jvalue.get_##ResultType(); \ 1243 return ret;\ 1244 JNI_END 1245 1246 // the runtime type of subword integral basic types is integer 1247 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1248 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1249 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1250 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1251 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1252 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1253 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1254 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1255 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1256 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1257 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1258 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1259 1260 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1261 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1262 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1263 DEFINE_CALLMETHODV(jint, Int, T_INT, 1264 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1265 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1266 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1267 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1268 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1269 // Float and double probes don't return value because dtrace doesn't currently support it 1270 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1271 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1272 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1273 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1274 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1275 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1276 1277 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1278 , EntryProbe, ReturnProbe) \ 1279 \ 1280 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1281 , ReturnProbe); \ 1282 \ 1283 JNI_ENTRY(ResultType, \ 1284 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1285 EntryProbe; \ 1286 ResultType ret = 0;\ 1287 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1288 (const ResultType&)ret);\ 1289 \ 1290 JavaValue jvalue(Tag); \ 1291 JNI_ArgumentPusherArray ap(methodID, args); \ 1292 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1293 ret = jvalue.get_##ResultType(); \ 1294 return ret;\ 1295 JNI_END 1296 1297 // the runtime type of subword integral basic types is integer 1298 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1299 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1300 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1301 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1302 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1303 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1304 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1305 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1306 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1307 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1308 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1309 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1310 1311 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1312 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1313 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1314 DEFINE_CALLMETHODA(jint, Int, T_INT, 1315 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1316 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1317 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1318 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1319 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1320 // Float and double probes don't return value because dtrace doesn't currently support it 1321 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1322 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1323 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1324 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1325 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1326 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1327 1328 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1329 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1330 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1331 1332 1333 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1334 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1335 DT_VOID_RETURN_MARK(CallVoidMethod); 1336 1337 va_list args; 1338 va_start(args, methodID); 1339 JavaValue jvalue(T_VOID); 1340 JNI_ArgumentPusherVaArg ap(methodID, args); 1341 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1342 va_end(args); 1343 JNI_END 1344 1345 1346 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1347 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1348 DT_VOID_RETURN_MARK(CallVoidMethodV); 1349 1350 JavaValue jvalue(T_VOID); 1351 JNI_ArgumentPusherVaArg ap(methodID, args); 1352 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1353 JNI_END 1354 1355 1356 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1357 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1358 DT_VOID_RETURN_MARK(CallVoidMethodA); 1359 1360 JavaValue jvalue(T_VOID); 1361 JNI_ArgumentPusherArray ap(methodID, args); 1362 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1363 JNI_END 1364 1365 1366 1367 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1368 , EntryProbe, ReturnProbe) \ 1369 \ 1370 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1371 , ReturnProbe);\ 1372 \ 1373 JNI_ENTRY(ResultType, \ 1374 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1375 \ 1376 EntryProbe;\ 1377 ResultType ret;\ 1378 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1379 (const ResultType&)ret);\ 1380 \ 1381 va_list args; \ 1382 va_start(args, methodID); \ 1383 JavaValue jvalue(Tag); \ 1384 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1385 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1386 va_end(args); \ 1387 ret = jvalue.get_##ResultType(); \ 1388 return ret;\ 1389 JNI_END 1390 1391 // the runtime type of subword integral basic types is integer 1392 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1393 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1394 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1395 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1396 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1397 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1398 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1399 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1400 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1401 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1402 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1403 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1404 1405 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1406 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1407 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1408 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1409 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1410 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1411 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1412 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1413 // Float and double probes don't return value because dtrace doesn't currently support it 1414 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1415 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1416 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1417 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1418 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1419 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1420 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1421 1422 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1423 , EntryProbe, ReturnProbe) \ 1424 \ 1425 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1426 , ReturnProbe);\ 1427 \ 1428 JNI_ENTRY(ResultType, \ 1429 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1430 \ 1431 EntryProbe;\ 1432 ResultType ret;\ 1433 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1434 (const ResultType&)ret);\ 1435 \ 1436 JavaValue jvalue(Tag); \ 1437 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1438 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1439 ret = jvalue.get_##ResultType(); \ 1440 return ret;\ 1441 JNI_END 1442 1443 // the runtime type of subword integral basic types is integer 1444 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1445 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1446 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1447 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1448 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1449 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1450 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1451 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1452 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1453 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1454 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1455 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1456 1457 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1458 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1459 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1460 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1461 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1462 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1463 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1464 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1465 // Float and double probes don't return value because dtrace doesn't currently support it 1466 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1467 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1468 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1469 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1470 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1471 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1472 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1473 1474 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1475 , EntryProbe, ReturnProbe) \ 1476 \ 1477 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1478 , ReturnProbe);\ 1479 \ 1480 JNI_ENTRY(ResultType, \ 1481 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1482 \ 1483 EntryProbe;\ 1484 ResultType ret;\ 1485 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1486 (const ResultType&)ret);\ 1487 \ 1488 JavaValue jvalue(Tag); \ 1489 JNI_ArgumentPusherArray ap(methodID, args); \ 1490 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1491 ret = jvalue.get_##ResultType(); \ 1492 return ret;\ 1493 JNI_END 1494 1495 // the runtime type of subword integral basic types is integer 1496 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1497 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1498 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1499 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1500 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1501 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1502 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1503 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1504 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1505 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1506 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1507 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1508 1509 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1510 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1511 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1512 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1513 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1514 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1515 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1516 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1517 // Float and double probes don't return value because dtrace doesn't currently support it 1518 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1519 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1520 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1521 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1522 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1523 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1524 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1525 1526 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1527 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1528 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1529 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1530 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1531 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1532 1533 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1534 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1535 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1536 1537 va_list args; 1538 va_start(args, methodID); 1539 JavaValue jvalue(T_VOID); 1540 JNI_ArgumentPusherVaArg ap(methodID, args); 1541 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1542 va_end(args); 1543 JNI_END 1544 1545 1546 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1547 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1548 env, obj, cls, (uintptr_t) methodID); 1549 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1550 1551 JavaValue jvalue(T_VOID); 1552 JNI_ArgumentPusherVaArg ap(methodID, args); 1553 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1554 JNI_END 1555 1556 1557 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1558 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1559 env, obj, cls, (uintptr_t) methodID); 1560 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1561 JavaValue jvalue(T_VOID); 1562 JNI_ArgumentPusherArray ap(methodID, args); 1563 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1564 JNI_END 1565 1566 1567 1568 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1569 , EntryProbe, ResultProbe) \ 1570 \ 1571 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1572 , ResultProbe); \ 1573 \ 1574 JNI_ENTRY(ResultType, \ 1575 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1576 \ 1577 EntryProbe; \ 1578 ResultType ret = 0;\ 1579 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1580 (const ResultType&)ret);\ 1581 \ 1582 va_list args; \ 1583 va_start(args, methodID); \ 1584 JavaValue jvalue(Tag); \ 1585 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1586 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1587 va_end(args); \ 1588 ret = jvalue.get_##ResultType(); \ 1589 return ret;\ 1590 JNI_END 1591 1592 // the runtime type of subword integral basic types is integer 1593 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1594 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1595 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1596 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1597 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1598 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1599 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1600 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1601 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1602 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1603 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1604 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1605 1606 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1607 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1608 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1609 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1610 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1611 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1612 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1613 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1614 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1615 // Float and double probes don't return value because dtrace doesn't currently support it 1616 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1617 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1618 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1619 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1620 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1621 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1622 1623 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1624 , EntryProbe, ResultProbe) \ 1625 \ 1626 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1627 , ResultProbe); \ 1628 \ 1629 JNI_ENTRY(ResultType, \ 1630 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1631 \ 1632 EntryProbe; \ 1633 ResultType ret = 0;\ 1634 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1635 (const ResultType&)ret);\ 1636 \ 1637 JavaValue jvalue(Tag); \ 1638 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1639 /* Make sure class is initialized before trying to invoke its method */ \ 1640 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1641 k->initialize(CHECK_0); \ 1642 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1643 va_end(args); \ 1644 ret = jvalue.get_##ResultType(); \ 1645 return ret;\ 1646 JNI_END 1647 1648 // the runtime type of subword integral basic types is integer 1649 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1650 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1651 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1652 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1653 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1654 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1655 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1656 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1657 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1658 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1659 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1660 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1661 1662 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1663 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1664 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1665 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1666 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1667 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1668 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1669 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1670 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1671 // Float and double probes don't return value because dtrace doesn't currently support it 1672 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1673 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1674 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1675 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1676 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1677 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1678 1679 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1680 , EntryProbe, ResultProbe) \ 1681 \ 1682 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1683 , ResultProbe); \ 1684 \ 1685 JNI_ENTRY(ResultType, \ 1686 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1687 \ 1688 EntryProbe; \ 1689 ResultType ret = 0;\ 1690 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1691 (const ResultType&)ret);\ 1692 \ 1693 JavaValue jvalue(Tag); \ 1694 JNI_ArgumentPusherArray ap(methodID, args); \ 1695 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1696 ret = jvalue.get_##ResultType(); \ 1697 return ret;\ 1698 JNI_END 1699 1700 // the runtime type of subword integral basic types is integer 1701 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1702 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1703 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1704 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1705 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1706 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1707 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1708 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1709 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1710 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1711 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1712 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1713 1714 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1715 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1716 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1717 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1718 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1719 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1720 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1721 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1722 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1723 // Float and double probes don't return value because dtrace doesn't currently support it 1724 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1725 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1726 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1727 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1728 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1729 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1730 1731 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1732 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1733 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1734 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1735 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1736 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1737 1738 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1739 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1740 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1741 1742 va_list args; 1743 va_start(args, methodID); 1744 JavaValue jvalue(T_VOID); 1745 JNI_ArgumentPusherVaArg ap(methodID, args); 1746 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1747 va_end(args); 1748 JNI_END 1749 1750 1751 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1752 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1753 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1754 1755 JavaValue jvalue(T_VOID); 1756 JNI_ArgumentPusherVaArg ap(methodID, args); 1757 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1758 JNI_END 1759 1760 1761 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1762 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1763 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1764 1765 JavaValue jvalue(T_VOID); 1766 JNI_ArgumentPusherArray ap(methodID, args); 1767 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1768 JNI_END 1769 1770 1771 // 1772 // Accessing Fields 1773 // 1774 1775 1776 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1777 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1778 1779 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1780 const char *name, const char *sig)) 1781 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1782 jfieldID ret = 0; 1783 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1784 1785 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1786 1787 // The class should have been loaded (we have an instance of the class 1788 // passed in) so the field and signature should already be in the symbol 1789 // table. If they're not there, the field doesn't exist. 1790 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1791 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1792 if (fieldname == nullptr || signame == nullptr) { 1793 ResourceMark rm; 1794 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1795 } 1796 1797 // Make sure class is initialized before handing id's out to fields 1798 k->initialize(CHECK_NULL); 1799 1800 fieldDescriptor fd; 1801 if (!k->is_instance_klass() || 1802 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1803 ResourceMark rm; 1804 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1805 } 1806 1807 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1808 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1809 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat()); 1810 return ret; 1811 JNI_END 1812 1813 1814 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1815 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1816 oop o = JNIHandles::resolve_non_null(obj); 1817 Klass* k = o->klass(); 1818 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1819 oop res = nullptr; 1820 // Keep JVMTI addition small and only check enabled flag here. 1821 // jni_GetField_probe() assumes that is okay to create handles. 1822 if (JvmtiExport::should_post_field_access()) { 1823 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1824 } 1825 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) { 1826 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1827 } else { 1828 assert(k->is_instance_klass(), "Only instance can have flat fields"); 1829 InstanceKlass* ik = InstanceKlass::cast(k); 1830 fieldDescriptor fd; 1831 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck 1832 InstanceKlass* holder = fd.field_holder(); 1833 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1834 res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), CHECK_NULL); 1835 } 1836 jobject ret = JNIHandles::make_local(THREAD, res); 1837 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1838 return ret; 1839 JNI_END 1840 1841 1842 1843 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1844 , EntryProbe, ReturnProbe) \ 1845 \ 1846 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1847 , ReturnProbe); \ 1848 \ 1849 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1850 \ 1851 EntryProbe; \ 1852 Return ret = 0;\ 1853 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1854 \ 1855 oop o = JNIHandles::resolve_non_null(obj); \ 1856 Klass* k = o->klass(); \ 1857 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1858 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1859 if (JvmtiExport::should_post_field_access()) { \ 1860 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \ 1861 } \ 1862 ret = o->Fieldname##_field(offset); \ 1863 return ret; \ 1864 JNI_END 1865 1866 DEFINE_GETFIELD(jboolean, bool, Boolean 1867 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1868 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1869 DEFINE_GETFIELD(jbyte, byte, Byte 1870 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1871 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1872 DEFINE_GETFIELD(jchar, char, Char 1873 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1874 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1875 DEFINE_GETFIELD(jshort, short, Short 1876 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1877 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1878 DEFINE_GETFIELD(jint, int, Int 1879 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1880 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1881 DEFINE_GETFIELD(jlong, long, Long 1882 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1883 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1884 // Float and double probes don't return value because dtrace doesn't currently support it 1885 DEFINE_GETFIELD(jfloat, float, Float 1886 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1887 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1888 DEFINE_GETFIELD(jdouble, double, Double 1889 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1890 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1891 1892 address jni_GetBooleanField_addr() { 1893 return (address)jni_GetBooleanField; 1894 } 1895 address jni_GetByteField_addr() { 1896 return (address)jni_GetByteField; 1897 } 1898 address jni_GetCharField_addr() { 1899 return (address)jni_GetCharField; 1900 } 1901 address jni_GetShortField_addr() { 1902 return (address)jni_GetShortField; 1903 } 1904 address jni_GetIntField_addr() { 1905 return (address)jni_GetIntField; 1906 } 1907 address jni_GetLongField_addr() { 1908 return (address)jni_GetLongField; 1909 } 1910 address jni_GetFloatField_addr() { 1911 return (address)jni_GetFloatField; 1912 } 1913 address jni_GetDoubleField_addr() { 1914 return (address)jni_GetDoubleField; 1915 } 1916 1917 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1918 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 1919 oop o = JNIHandles::resolve_non_null(obj); 1920 Klass* k = o->klass(); 1921 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1922 // Keep JVMTI addition small and only check enabled flag here. 1923 if (JvmtiExport::should_post_field_modification()) { 1924 jvalue field_value; 1925 field_value.l = value; 1926 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 1927 } 1928 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) { 1929 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 1930 } else { 1931 assert(k->is_instance_klass(), "Only instances can have flat fields"); 1932 InstanceKlass* ik = InstanceKlass::cast(k); 1933 fieldDescriptor fd; 1934 ik->find_field_from_offset(offset, false, &fd); 1935 InstanceKlass* holder = fd.field_holder(); 1936 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1937 oop v = JNIHandles::resolve_non_null(value); 1938 vklass->write_flat_field(o, offset, v, CHECK); 1939 } 1940 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 1941 JNI_END 1942 1943 // TODO: make this a template 1944 1945 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 1946 , EntryProbe, ReturnProbe) \ 1947 \ 1948 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 1949 \ 1950 EntryProbe; \ 1951 \ 1952 oop o = JNIHandles::resolve_non_null(obj); \ 1953 Klass* k = o->klass(); \ 1954 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1955 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1956 if (JvmtiExport::should_post_field_modification()) { \ 1957 jvalue field_value; \ 1958 field_value.unionType = value; \ 1959 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 1960 } \ 1961 o->Fieldname##_field_put(offset, value); \ 1962 ReturnProbe; \ 1963 JNI_END 1964 1965 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 1966 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1967 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 1968 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 1969 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1970 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 1971 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 1972 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1973 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 1974 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 1975 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1976 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 1977 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 1978 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1979 HOTSPOT_JNI_SETINTFIELD_RETURN()) 1980 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 1981 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1982 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 1983 // Float and double probes don't return value because dtrace doesn't currently support it 1984 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 1985 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1986 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 1987 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 1988 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1989 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 1990 1991 DT_RETURN_MARK_DECL(ToReflectedField, jobject 1992 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 1993 1994 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 1995 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 1996 jobject ret = nullptr; 1997 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 1998 1999 fieldDescriptor fd; 2000 bool found = false; 2001 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2002 2003 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2004 2005 if (isStatic) { 2006 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2007 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2008 assert(id->is_static_field_id(), "invalid static field id"); 2009 found = id->find_local_field(&fd); 2010 } else { 2011 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2012 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2013 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2014 } 2015 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2016 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2017 ret = JNIHandles::make_local(THREAD, reflected); 2018 return ret; 2019 JNI_END 2020 2021 2022 // 2023 // Accessing Static Fields 2024 // 2025 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2026 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2027 2028 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2029 const char *name, const char *sig)) 2030 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2031 jfieldID ret = nullptr; 2032 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2033 2034 // The class should have been loaded (we have an instance of the class 2035 // passed in) so the field and signature should already be in the symbol 2036 // table. If they're not there, the field doesn't exist. 2037 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2038 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2039 if (fieldname == nullptr || signame == nullptr) { 2040 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2041 } 2042 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2043 // Make sure class is initialized before handing id's out to static fields 2044 k->initialize(CHECK_NULL); 2045 2046 fieldDescriptor fd; 2047 if (!k->is_instance_klass() || 2048 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2049 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2050 } 2051 2052 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2053 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2054 debug_only(id->set_is_static_field_id();) 2055 2056 debug_only(id->verify(fd.field_holder())); 2057 2058 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2059 return ret; 2060 JNI_END 2061 2062 2063 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2064 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2065 #if INCLUDE_JNI_CHECK 2066 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2067 #endif // INCLUDE_JNI_CHECK 2068 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2069 assert(id->is_static_field_id(), "invalid static field id"); 2070 // Keep JVMTI addition small and only check enabled flag here. 2071 // jni_GetField_probe() assumes that is okay to create handles. 2072 if (JvmtiExport::should_post_field_access()) { 2073 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); 2074 } 2075 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2076 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2077 return ret; 2078 JNI_END 2079 2080 2081 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2082 , EntryProbe, ReturnProbe) \ 2083 \ 2084 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2085 , ReturnProbe); \ 2086 \ 2087 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2088 EntryProbe; \ 2089 Return ret = 0;\ 2090 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2091 (const Return&)ret);\ 2092 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2093 assert(id->is_static_field_id(), "invalid static field id"); \ 2094 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2095 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2096 if (JvmtiExport::should_post_field_access()) { \ 2097 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \ 2098 } \ 2099 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2100 return ret;\ 2101 JNI_END 2102 2103 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2104 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2105 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2106 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2107 DEFINE_GETSTATICFIELD(jchar, char, Char 2108 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2109 DEFINE_GETSTATICFIELD(jshort, short, Short 2110 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2111 DEFINE_GETSTATICFIELD(jint, int, Int 2112 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2113 DEFINE_GETSTATICFIELD(jlong, long, Long 2114 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2115 // Float and double probes don't return value because dtrace doesn't currently support it 2116 DEFINE_GETSTATICFIELD(jfloat, float, Float 2117 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2118 DEFINE_GETSTATICFIELD(jdouble, double, Double 2119 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2120 2121 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2122 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2123 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2124 assert(id->is_static_field_id(), "invalid static field id"); 2125 // Keep JVMTI addition small and only check enabled flag here. 2126 // jni_SetField_probe() assumes that is okay to create handles. 2127 if (JvmtiExport::should_post_field_modification()) { 2128 jvalue field_value; 2129 field_value.l = value; 2130 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2131 } 2132 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2133 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2134 JNI_END 2135 2136 2137 2138 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2139 , EntryProbe, ReturnProbe) \ 2140 \ 2141 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2142 EntryProbe; \ 2143 \ 2144 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2145 assert(id->is_static_field_id(), "invalid static field id"); \ 2146 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2147 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2148 if (JvmtiExport::should_post_field_modification()) { \ 2149 jvalue field_value; \ 2150 field_value.unionType = value; \ 2151 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2152 } \ 2153 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2154 ReturnProbe;\ 2155 JNI_END 2156 2157 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2158 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2159 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2160 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2161 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2162 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2163 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2164 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2165 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2166 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2167 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2168 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2169 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2170 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2171 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2172 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2173 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2174 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2175 // Float and double probes don't return value because dtrace doesn't currently support it 2176 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2177 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2178 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2179 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2180 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2181 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2182 2183 // 2184 // String Operations 2185 // 2186 2187 // Unicode Interface 2188 2189 DT_RETURN_MARK_DECL(NewString, jstring 2190 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2191 2192 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2193 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2194 jstring ret = nullptr; 2195 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2196 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2197 ret = (jstring) JNIHandles::make_local(THREAD, string); 2198 return ret; 2199 JNI_END 2200 2201 2202 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2203 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2204 jsize ret = 0; 2205 oop s = JNIHandles::resolve_non_null(string); 2206 ret = java_lang_String::length(s); 2207 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2208 return ret; 2209 JNI_END 2210 2211 2212 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2213 JNIEnv *env, jstring string, jboolean *isCopy)) 2214 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2215 jchar* buf = nullptr; 2216 oop s = JNIHandles::resolve_non_null(string); 2217 typeArrayOop s_value = java_lang_String::value(s); 2218 if (s_value != nullptr) { 2219 int s_len = java_lang_String::length(s, s_value); 2220 bool is_latin1 = java_lang_String::is_latin1(s); 2221 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2222 /* JNI Specification states return null on OOM */ 2223 if (buf != nullptr) { 2224 if (s_len > 0) { 2225 if (!is_latin1) { 2226 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2227 buf, s_len); 2228 } else { 2229 for (int i = 0; i < s_len; i++) { 2230 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2231 } 2232 } 2233 } 2234 buf[s_len] = 0; 2235 //%note jni_5 2236 if (isCopy != nullptr) { 2237 *isCopy = JNI_TRUE; 2238 } 2239 } 2240 } 2241 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2242 return buf; 2243 JNI_END 2244 2245 2246 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2247 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2248 //%note jni_6 2249 if (chars != nullptr) { 2250 // Since String objects are supposed to be immutable, don't copy any 2251 // new data back. A bad user will have to go after the char array. 2252 FreeHeap((void*) chars); 2253 } 2254 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2255 JNI_END 2256 2257 2258 // UTF Interface 2259 2260 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2261 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2262 2263 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2264 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2265 jstring ret; 2266 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2267 2268 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2269 ret = (jstring) JNIHandles::make_local(THREAD, result); 2270 return ret; 2271 JNI_END 2272 2273 2274 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2275 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2276 oop java_string = JNIHandles::resolve_non_null(string); 2277 jsize ret = java_lang_String::utf8_length(java_string); 2278 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2279 return ret; 2280 JNI_END 2281 2282 2283 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2284 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2285 char* result = nullptr; 2286 oop java_string = JNIHandles::resolve_non_null(string); 2287 typeArrayOop s_value = java_lang_String::value(java_string); 2288 if (s_value != nullptr) { 2289 size_t length = java_lang_String::utf8_length(java_string, s_value); 2290 /* JNI Specification states return null on OOM */ 2291 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL); 2292 if (result != nullptr) { 2293 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2294 if (isCopy != nullptr) { 2295 *isCopy = JNI_TRUE; 2296 } 2297 } 2298 } 2299 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2300 return result; 2301 JNI_END 2302 2303 2304 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2305 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2306 if (chars != nullptr) { 2307 FreeHeap((char*) chars); 2308 } 2309 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2310 JNI_END 2311 2312 2313 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2314 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2315 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2316 assert(a->is_array(), "must be array"); 2317 jsize ret = a->length(); 2318 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2319 return ret; 2320 JNI_END 2321 2322 2323 // 2324 // Object Array Operations 2325 // 2326 2327 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2328 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2329 2330 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2331 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2332 jobjectArray ret = nullptr; 2333 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2334 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2335 Klass* ak = ek->array_klass(CHECK_NULL); 2336 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2337 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2338 oop initial_value = JNIHandles::resolve(initialElement); 2339 if (initial_value != nullptr) { // array already initialized with null 2340 for (int index = 0; index < length; index++) { 2341 result->obj_at_put(index, initial_value); 2342 } 2343 } 2344 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2345 return ret; 2346 JNI_END 2347 2348 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2349 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2350 2351 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2352 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2353 jobject ret = nullptr; 2354 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2355 oop res = nullptr; 2356 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2357 if (arr->is_within_bounds(index)) { 2358 if (arr->is_flatArray()) { 2359 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2360 flatArrayHandle vah(thread, a); 2361 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL); 2362 assert(res != nullptr, "Must be set in one of two paths above"); 2363 } else { 2364 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2365 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2366 res = a->obj_at(index); 2367 } 2368 } else { 2369 ResourceMark rm(THREAD); 2370 stringStream ss; 2371 ss.print("Index %d out of bounds for length %d", index,arr->length()); 2372 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2373 } 2374 ret = JNIHandles::make_local(THREAD, res); 2375 return ret; 2376 JNI_END 2377 2378 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2379 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2380 2381 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2382 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2383 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2384 2385 bool oob = false; 2386 int length = -1; 2387 oop res = nullptr; 2388 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2389 if (arr->is_within_bounds(index)) { 2390 if (arr->is_flatArray()) { 2391 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2392 oop v = JNIHandles::resolve(value); 2393 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass()); 2394 InlineKlass* element_vklass = vaklass->element_klass(); 2395 if (v != nullptr && v->is_a(element_vklass)) { 2396 a->value_copy_to_index(v, index); 2397 } else { 2398 ResourceMark rm(THREAD); 2399 stringStream ss; 2400 Klass *kl = FlatArrayKlass::cast(a->klass()); 2401 ss.print("type mismatch: can not store %s to %s[%d]", 2402 v->klass()->external_name(), 2403 kl->external_name(), 2404 index); 2405 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2406 ss.print("[]"); 2407 } 2408 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2409 } 2410 } else { 2411 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2412 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2413 oop v = JNIHandles::resolve(value); 2414 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2415 a->obj_at_put(index, v); 2416 } else { 2417 ResourceMark rm(THREAD); 2418 stringStream ss; 2419 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2420 ss.print("type mismatch: can not store %s to %s[%d]", 2421 v->klass()->external_name(), 2422 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2423 index); 2424 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2425 ss.print("[]"); 2426 } 2427 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2428 } 2429 } 2430 } else { 2431 ResourceMark rm(THREAD); 2432 stringStream ss; 2433 ss.print("Index %d out of bounds for length %d", index, arr->length()); 2434 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2435 } 2436 JNI_END 2437 2438 2439 2440 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2441 ,EntryProbe,ReturnProbe) \ 2442 \ 2443 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2444 , ReturnProbe); \ 2445 \ 2446 JNI_ENTRY(Return, \ 2447 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2448 EntryProbe; \ 2449 Return ret = nullptr;\ 2450 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2451 \ 2452 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2453 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2454 return ret;\ 2455 JNI_END 2456 2457 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2458 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2459 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2460 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2461 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2462 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2463 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2464 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2465 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2466 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2467 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2468 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2469 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2470 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2471 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2472 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2473 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2474 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2475 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2476 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2477 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2478 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2479 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2480 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2481 2482 // Return an address which will fault if the caller writes to it. 2483 2484 static char* get_bad_address() { 2485 static char* bad_address = nullptr; 2486 if (bad_address == nullptr) { 2487 size_t size = os::vm_allocation_granularity(); 2488 bad_address = os::reserve_memory(size); 2489 if (bad_address != nullptr) { 2490 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2491 /*is_committed*/false); 2492 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2493 } 2494 } 2495 return bad_address; 2496 } 2497 2498 2499 2500 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2501 , EntryProbe, ReturnProbe) \ 2502 \ 2503 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2504 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2505 EntryProbe; \ 2506 /* allocate an chunk of memory in c land */ \ 2507 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2508 ElementType* result; \ 2509 int len = a->length(); \ 2510 if (len == 0) { \ 2511 if (isCopy != nullptr) { \ 2512 *isCopy = JNI_FALSE; \ 2513 } \ 2514 /* Empty array: legal but useless, can't return null. \ 2515 * Return a pointer to something useless. \ 2516 * Avoid asserts in typeArrayOop. */ \ 2517 result = (ElementType*)get_bad_address(); \ 2518 } else { \ 2519 /* JNI Specification states return null on OOM */ \ 2520 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2521 if (result != nullptr) { \ 2522 /* copy the array to the c chunk */ \ 2523 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2524 result, len); \ 2525 if (isCopy) { \ 2526 *isCopy = JNI_TRUE; \ 2527 } \ 2528 } \ 2529 } \ 2530 ReturnProbe; \ 2531 return result; \ 2532 JNI_END 2533 2534 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2535 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2536 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2537 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2538 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2539 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2540 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2541 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2542 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2543 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2544 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2545 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2546 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2547 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2548 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2549 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2550 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2551 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2552 // Float and double probes don't return value because dtrace doesn't currently support it 2553 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2554 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2555 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2556 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2557 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2558 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2559 2560 2561 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2562 , EntryProbe, ReturnProbe);\ 2563 \ 2564 JNI_ENTRY_NO_PRESERVE(void, \ 2565 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2566 ElementType *buf, jint mode)) \ 2567 EntryProbe; \ 2568 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2569 int len = a->length(); \ 2570 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2571 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2572 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2573 } \ 2574 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2575 FreeHeap(buf); \ 2576 } \ 2577 } \ 2578 ReturnProbe; \ 2579 JNI_END 2580 2581 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2582 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2583 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2584 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2585 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2586 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2587 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2588 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2589 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2590 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2591 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2592 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2593 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2594 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2595 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2596 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2597 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2598 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2599 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2600 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2601 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2602 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2603 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2604 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2605 2606 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2607 ResourceMark rm(THREAD); 2608 if (copy_len < 0) { 2609 stringStream ss; 2610 ss.print("Length %d is negative", copy_len); 2611 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2612 } else if (start < 0 || (start > array_len - copy_len)) { 2613 stringStream ss; 2614 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2615 start, (int64_t)start+(int64_t)copy_len, array_len); 2616 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2617 } 2618 } 2619 2620 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2621 , EntryProbe, ReturnProbe); \ 2622 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2623 , ReturnProbe); \ 2624 \ 2625 JNI_ENTRY(void, \ 2626 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2627 jsize len, ElementType *buf)) \ 2628 EntryProbe; \ 2629 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2630 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2631 check_bounds(start, len, src->length(), CHECK); \ 2632 if (len > 0) { \ 2633 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2634 } \ 2635 JNI_END 2636 2637 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2638 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2639 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2640 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2641 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2642 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2643 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2644 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2645 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2646 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2647 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2648 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2649 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2650 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2651 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2652 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2653 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2654 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2655 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2656 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2657 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2658 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2659 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2660 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2661 2662 2663 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2664 , EntryProbe, ReturnProbe); \ 2665 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2666 ,ReturnProbe); \ 2667 \ 2668 JNI_ENTRY(void, \ 2669 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2670 jsize len, const ElementType *buf)) \ 2671 EntryProbe; \ 2672 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2673 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2674 check_bounds(start, len, dst->length(), CHECK); \ 2675 if (len > 0) { \ 2676 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2677 } \ 2678 JNI_END 2679 2680 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2681 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2682 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2683 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2684 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2685 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2686 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2687 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2688 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2689 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2690 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2691 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2692 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2693 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2694 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2695 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2696 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2697 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2698 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2699 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2700 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2701 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2702 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2703 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2704 2705 2706 DT_RETURN_MARK_DECL(RegisterNatives, jint 2707 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2708 2709 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2710 const JNINativeMethod *methods, 2711 jint nMethods)) 2712 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2713 jint ret = 0; 2714 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2715 2716 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2717 2718 // There are no restrictions on native code registering native methods, 2719 // which allows agents to redefine the bindings to native methods, however 2720 // we issue a warning if any code running outside of the boot/platform 2721 // loader is rebinding any native methods in classes loaded by the 2722 // boot/platform loader that are in named modules. That will catch changes 2723 // to platform classes while excluding classes added to the bootclasspath. 2724 bool do_warning = false; 2725 2726 // Only instanceKlasses can have native methods 2727 if (k->is_instance_klass()) { 2728 oop cl = k->class_loader(); 2729 InstanceKlass* ik = InstanceKlass::cast(k); 2730 // Check for a platform class 2731 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) && 2732 ik->module()->is_named()) { 2733 Klass* caller = thread->security_get_caller_class(1); 2734 // If no caller class, or caller class has a different loader, then 2735 // issue a warning below. 2736 do_warning = (caller == nullptr) || caller->class_loader() != cl; 2737 } 2738 } 2739 2740 2741 for (int index = 0; index < nMethods; index++) { 2742 const char* meth_name = methods[index].name; 2743 const char* meth_sig = methods[index].signature; 2744 int meth_name_len = (int)strlen(meth_name); 2745 2746 // The class should have been loaded (we have an instance of the class 2747 // passed in) so the method and signature should already be in the symbol 2748 // table. If they're not there, the method doesn't exist. 2749 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2750 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2751 2752 if (name == nullptr || signature == nullptr) { 2753 ResourceMark rm(THREAD); 2754 stringStream st; 2755 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2756 // Must return negative value on failure 2757 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2758 } 2759 2760 if (do_warning) { 2761 ResourceMark rm(THREAD); 2762 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2763 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2764 } 2765 2766 bool res = Method::register_native(k, name, signature, 2767 (address) methods[index].fnPtr, THREAD); 2768 if (!res) { 2769 ret = -1; 2770 break; 2771 } 2772 } 2773 return ret; 2774 JNI_END 2775 2776 2777 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2778 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2779 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2780 //%note jni_2 2781 if (k->is_instance_klass()) { 2782 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2783 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2784 if (m->is_native()) { 2785 m->clear_native_function(); 2786 m->set_signature_handler(nullptr); 2787 } 2788 } 2789 } 2790 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2791 return 0; 2792 JNI_END 2793 2794 // 2795 // Monitor functions 2796 // 2797 2798 DT_RETURN_MARK_DECL(MonitorEnter, jint 2799 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2800 2801 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2802 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2803 jint ret = JNI_ERR; 2804 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2805 2806 // If the object is null, we can't do anything with it 2807 if (jobj == nullptr) { 2808 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2809 } 2810 2811 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2812 ObjectSynchronizer::jni_enter(obj, thread); 2813 return JNI_OK; 2814 JNI_END 2815 2816 DT_RETURN_MARK_DECL(MonitorExit, jint 2817 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2818 2819 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2820 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2821 jint ret = JNI_ERR; 2822 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2823 2824 // Don't do anything with a null object 2825 if (jobj == nullptr) { 2826 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2827 } 2828 2829 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2830 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2831 return JNI_OK; 2832 JNI_END 2833 2834 // 2835 // Extensions 2836 // 2837 2838 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2839 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2840 2841 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2842 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2843 DT_VOID_RETURN_MARK(GetStringRegion); 2844 oop s = JNIHandles::resolve_non_null(string); 2845 typeArrayOop s_value = java_lang_String::value(s); 2846 int s_len = java_lang_String::length(s, s_value); 2847 if (start < 0 || len < 0 || start > s_len - len) { 2848 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2849 } else { 2850 if (len > 0) { 2851 bool is_latin1 = java_lang_String::is_latin1(s); 2852 if (!is_latin1) { 2853 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2854 buf, len); 2855 } else { 2856 for (int i = 0; i < len; i++) { 2857 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2858 } 2859 } 2860 } 2861 } 2862 JNI_END 2863 2864 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2865 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2866 2867 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2868 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2869 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2870 oop s = JNIHandles::resolve_non_null(string); 2871 typeArrayOop s_value = java_lang_String::value(s); 2872 int s_len = java_lang_String::length(s, s_value); 2873 if (start < 0 || len < 0 || start > s_len - len) { 2874 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2875 } else { 2876 //%note jni_7 2877 if (len > 0) { 2878 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2879 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2880 // as_utf8_string null-terminates the result string 2881 } else { 2882 // JDK null-terminates the buffer even in len is zero 2883 if (buf != nullptr) { 2884 buf[0] = 0; 2885 } 2886 } 2887 } 2888 JNI_END 2889 2890 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2891 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2892 Handle a(thread, JNIHandles::resolve_non_null(array)); 2893 assert(a->is_typeArray(), "just checking"); 2894 2895 // Pin object 2896 Universe::heap()->pin_object(thread, a()); 2897 2898 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 2899 void* ret = arrayOop(a())->base(type); 2900 if (isCopy != nullptr) { 2901 *isCopy = JNI_FALSE; 2902 } 2903 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2904 return ret; 2905 JNI_END 2906 2907 2908 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2909 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 2910 // Unpin object 2911 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array)); 2912 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 2913 JNI_END 2914 2915 2916 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 2917 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 2918 oop s = JNIHandles::resolve_non_null(string); 2919 jchar* ret; 2920 if (!java_lang_String::is_latin1(s)) { 2921 typeArrayHandle s_value(thread, java_lang_String::value(s)); 2922 2923 // Pin value array 2924 Universe::heap()->pin_object(thread, s_value()); 2925 2926 ret = (jchar*) s_value->base(T_CHAR); 2927 if (isCopy != nullptr) *isCopy = JNI_FALSE; 2928 } else { 2929 // Inflate latin1 encoded string to UTF16 2930 typeArrayOop s_value = java_lang_String::value(s); 2931 int s_len = java_lang_String::length(s, s_value); 2932 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2933 /* JNI Specification states return null on OOM */ 2934 if (ret != nullptr) { 2935 for (int i = 0; i < s_len; i++) { 2936 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2937 } 2938 ret[s_len] = 0; 2939 } 2940 if (isCopy != nullptr) *isCopy = JNI_TRUE; 2941 } 2942 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 2943 return ret; 2944 JNI_END 2945 2946 2947 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 2948 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 2949 oop s = JNIHandles::resolve_non_null(str); 2950 bool is_latin1 = java_lang_String::is_latin1(s); 2951 2952 if (is_latin1) { 2953 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 2954 // This assumes that ReleaseStringCritical bookends GetStringCritical. 2955 FREE_C_HEAP_ARRAY(jchar, chars); 2956 } else { 2957 // StringDedup can have replaced the value array, so don't fetch the array from 's'. 2958 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical. 2959 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR)); 2960 2961 // Unpin value array 2962 Universe::heap()->unpin_object(thread, value); 2963 } 2964 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 2965 JNI_END 2966 2967 2968 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 2969 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 2970 Handle ref_handle(thread, JNIHandles::resolve(ref)); 2971 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 2972 if (ret == nullptr && ref_handle.not_null()) { 2973 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr); 2974 } 2975 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 2976 return ret; 2977 JNI_END 2978 2979 // Must be JNI_ENTRY (with HandleMark) 2980 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 2981 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 2982 JNIHandles::destroy_weak_global(ref); 2983 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 2984 JNI_END 2985 2986 2987 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 2988 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 2989 jni_check_async_exceptions(thread); 2990 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 2991 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 2992 return ret; 2993 JNI_END 2994 2995 2996 // Initialization state for three routines below relating to 2997 // java.nio.DirectBuffers 2998 static int directBufferSupportInitializeStarted = 0; 2999 static volatile int directBufferSupportInitializeEnded = 0; 3000 static volatile int directBufferSupportInitializeFailed = 0; 3001 static jclass bufferClass = nullptr; 3002 static jclass directBufferClass = nullptr; 3003 static jclass directByteBufferClass = nullptr; 3004 static jmethodID directByteBufferConstructor = nullptr; 3005 static jfieldID directBufferAddressField = nullptr; 3006 static jfieldID bufferCapacityField = nullptr; 3007 3008 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3009 Handle loader; // null (bootstrap) loader 3010 Handle protection_domain; // null protection domain 3011 3012 TempNewSymbol sym = SymbolTable::new_symbol(name); 3013 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3014 3015 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 3016 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3017 } 3018 return result; 3019 } 3020 3021 // These lookups are done with the null (bootstrap) ClassLoader to 3022 // circumvent any security checks that would be done by jni_FindClass. 3023 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3024 { 3025 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; } 3026 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; } 3027 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; } 3028 return true; 3029 } 3030 JNI_END 3031 3032 3033 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3034 if (directBufferSupportInitializeFailed) { 3035 return false; 3036 } 3037 3038 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 3039 if (!lookupDirectBufferClasses(env)) { 3040 directBufferSupportInitializeFailed = 1; 3041 return false; 3042 } 3043 3044 // Make global references for these 3045 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3046 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3047 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3048 3049 // Global refs will be null if out-of-memory (no exception is pending) 3050 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) { 3051 directBufferSupportInitializeFailed = 1; 3052 return false; 3053 } 3054 3055 // Get needed field and method IDs 3056 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V"); 3057 if (env->ExceptionCheck()) { 3058 env->ExceptionClear(); 3059 directBufferSupportInitializeFailed = 1; 3060 return false; 3061 } 3062 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3063 if (env->ExceptionCheck()) { 3064 env->ExceptionClear(); 3065 directBufferSupportInitializeFailed = 1; 3066 return false; 3067 } 3068 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3069 if (env->ExceptionCheck()) { 3070 env->ExceptionClear(); 3071 directBufferSupportInitializeFailed = 1; 3072 return false; 3073 } 3074 3075 if ((directByteBufferConstructor == nullptr) || 3076 (directBufferAddressField == nullptr) || 3077 (bufferCapacityField == nullptr)) { 3078 directBufferSupportInitializeFailed = 1; 3079 return false; 3080 } 3081 3082 directBufferSupportInitializeEnded = 1; 3083 } else { 3084 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3085 os::naked_yield(); 3086 } 3087 } 3088 3089 return !directBufferSupportInitializeFailed; 3090 } 3091 3092 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3093 { 3094 // thread_from_jni_environment() will block if VM is gone. 3095 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3096 3097 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3098 3099 if (!directBufferSupportInitializeEnded) { 3100 if (!initializeDirectBufferSupport(env, thread)) { 3101 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr); 3102 return nullptr; 3103 } 3104 } 3105 3106 // Being paranoid about accidental sign extension on address 3107 jlong addr = (jlong) ((uintptr_t) address); 3108 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity); 3109 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3110 return ret; 3111 } 3112 3113 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3114 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3115 3116 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3117 { 3118 // thread_from_jni_environment() will block if VM is gone. 3119 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3120 3121 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3122 void* ret = nullptr; 3123 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3124 3125 if (!directBufferSupportInitializeEnded) { 3126 if (!initializeDirectBufferSupport(env, thread)) { 3127 return 0; 3128 } 3129 } 3130 3131 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) { 3132 return 0; 3133 } 3134 3135 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3136 return ret; 3137 } 3138 3139 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3140 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3141 3142 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3143 { 3144 // thread_from_jni_environment() will block if VM is gone. 3145 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3146 3147 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3148 jlong ret = -1; 3149 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3150 3151 if (!directBufferSupportInitializeEnded) { 3152 if (!initializeDirectBufferSupport(env, thread)) { 3153 ret = 0; 3154 return ret; 3155 } 3156 } 3157 3158 if (buf == nullptr) { 3159 return -1; 3160 } 3161 3162 if (!env->IsInstanceOf(buf, directBufferClass)) { 3163 return -1; 3164 } 3165 3166 // NOTE that capacity is currently an int in the implementation 3167 ret = env->GetIntField(buf, bufferCapacityField); 3168 return ret; 3169 } 3170 3171 3172 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3173 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3174 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3175 return CurrentVersion; 3176 JNI_END 3177 3178 extern struct JavaVM_ main_vm; 3179 3180 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3181 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3182 *vm = (JavaVM *)(&main_vm); 3183 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3184 return JNI_OK; 3185 JNI_END 3186 3187 3188 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3189 return Modules::get_module(clazz, THREAD); 3190 JNI_END 3191 3192 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj)) 3193 oop thread_obj = JNIHandles::resolve_external_guard(obj); 3194 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) { 3195 return JNI_TRUE; 3196 } else { 3197 return JNI_FALSE; 3198 } 3199 JNI_END 3200 3201 3202 // Structure containing all jni functions 3203 struct JNINativeInterface_ jni_NativeInterface = { 3204 nullptr, 3205 nullptr, 3206 nullptr, 3207 3208 nullptr, 3209 3210 jni_GetVersion, 3211 3212 jni_DefineClass, 3213 jni_FindClass, 3214 3215 jni_FromReflectedMethod, 3216 jni_FromReflectedField, 3217 3218 jni_ToReflectedMethod, 3219 3220 jni_GetSuperclass, 3221 jni_IsAssignableFrom, 3222 3223 jni_ToReflectedField, 3224 3225 jni_Throw, 3226 jni_ThrowNew, 3227 jni_ExceptionOccurred, 3228 jni_ExceptionDescribe, 3229 jni_ExceptionClear, 3230 jni_FatalError, 3231 3232 jni_PushLocalFrame, 3233 jni_PopLocalFrame, 3234 3235 jni_NewGlobalRef, 3236 jni_DeleteGlobalRef, 3237 jni_DeleteLocalRef, 3238 jni_IsSameObject, 3239 3240 jni_NewLocalRef, 3241 jni_EnsureLocalCapacity, 3242 3243 jni_AllocObject, 3244 jni_NewObject, 3245 jni_NewObjectV, 3246 jni_NewObjectA, 3247 3248 jni_GetObjectClass, 3249 jni_IsInstanceOf, 3250 3251 jni_GetMethodID, 3252 3253 jni_CallObjectMethod, 3254 jni_CallObjectMethodV, 3255 jni_CallObjectMethodA, 3256 jni_CallBooleanMethod, 3257 jni_CallBooleanMethodV, 3258 jni_CallBooleanMethodA, 3259 jni_CallByteMethod, 3260 jni_CallByteMethodV, 3261 jni_CallByteMethodA, 3262 jni_CallCharMethod, 3263 jni_CallCharMethodV, 3264 jni_CallCharMethodA, 3265 jni_CallShortMethod, 3266 jni_CallShortMethodV, 3267 jni_CallShortMethodA, 3268 jni_CallIntMethod, 3269 jni_CallIntMethodV, 3270 jni_CallIntMethodA, 3271 jni_CallLongMethod, 3272 jni_CallLongMethodV, 3273 jni_CallLongMethodA, 3274 jni_CallFloatMethod, 3275 jni_CallFloatMethodV, 3276 jni_CallFloatMethodA, 3277 jni_CallDoubleMethod, 3278 jni_CallDoubleMethodV, 3279 jni_CallDoubleMethodA, 3280 jni_CallVoidMethod, 3281 jni_CallVoidMethodV, 3282 jni_CallVoidMethodA, 3283 3284 jni_CallNonvirtualObjectMethod, 3285 jni_CallNonvirtualObjectMethodV, 3286 jni_CallNonvirtualObjectMethodA, 3287 jni_CallNonvirtualBooleanMethod, 3288 jni_CallNonvirtualBooleanMethodV, 3289 jni_CallNonvirtualBooleanMethodA, 3290 jni_CallNonvirtualByteMethod, 3291 jni_CallNonvirtualByteMethodV, 3292 jni_CallNonvirtualByteMethodA, 3293 jni_CallNonvirtualCharMethod, 3294 jni_CallNonvirtualCharMethodV, 3295 jni_CallNonvirtualCharMethodA, 3296 jni_CallNonvirtualShortMethod, 3297 jni_CallNonvirtualShortMethodV, 3298 jni_CallNonvirtualShortMethodA, 3299 jni_CallNonvirtualIntMethod, 3300 jni_CallNonvirtualIntMethodV, 3301 jni_CallNonvirtualIntMethodA, 3302 jni_CallNonvirtualLongMethod, 3303 jni_CallNonvirtualLongMethodV, 3304 jni_CallNonvirtualLongMethodA, 3305 jni_CallNonvirtualFloatMethod, 3306 jni_CallNonvirtualFloatMethodV, 3307 jni_CallNonvirtualFloatMethodA, 3308 jni_CallNonvirtualDoubleMethod, 3309 jni_CallNonvirtualDoubleMethodV, 3310 jni_CallNonvirtualDoubleMethodA, 3311 jni_CallNonvirtualVoidMethod, 3312 jni_CallNonvirtualVoidMethodV, 3313 jni_CallNonvirtualVoidMethodA, 3314 3315 jni_GetFieldID, 3316 3317 jni_GetObjectField, 3318 jni_GetBooleanField, 3319 jni_GetByteField, 3320 jni_GetCharField, 3321 jni_GetShortField, 3322 jni_GetIntField, 3323 jni_GetLongField, 3324 jni_GetFloatField, 3325 jni_GetDoubleField, 3326 3327 jni_SetObjectField, 3328 jni_SetBooleanField, 3329 jni_SetByteField, 3330 jni_SetCharField, 3331 jni_SetShortField, 3332 jni_SetIntField, 3333 jni_SetLongField, 3334 jni_SetFloatField, 3335 jni_SetDoubleField, 3336 3337 jni_GetStaticMethodID, 3338 3339 jni_CallStaticObjectMethod, 3340 jni_CallStaticObjectMethodV, 3341 jni_CallStaticObjectMethodA, 3342 jni_CallStaticBooleanMethod, 3343 jni_CallStaticBooleanMethodV, 3344 jni_CallStaticBooleanMethodA, 3345 jni_CallStaticByteMethod, 3346 jni_CallStaticByteMethodV, 3347 jni_CallStaticByteMethodA, 3348 jni_CallStaticCharMethod, 3349 jni_CallStaticCharMethodV, 3350 jni_CallStaticCharMethodA, 3351 jni_CallStaticShortMethod, 3352 jni_CallStaticShortMethodV, 3353 jni_CallStaticShortMethodA, 3354 jni_CallStaticIntMethod, 3355 jni_CallStaticIntMethodV, 3356 jni_CallStaticIntMethodA, 3357 jni_CallStaticLongMethod, 3358 jni_CallStaticLongMethodV, 3359 jni_CallStaticLongMethodA, 3360 jni_CallStaticFloatMethod, 3361 jni_CallStaticFloatMethodV, 3362 jni_CallStaticFloatMethodA, 3363 jni_CallStaticDoubleMethod, 3364 jni_CallStaticDoubleMethodV, 3365 jni_CallStaticDoubleMethodA, 3366 jni_CallStaticVoidMethod, 3367 jni_CallStaticVoidMethodV, 3368 jni_CallStaticVoidMethodA, 3369 3370 jni_GetStaticFieldID, 3371 3372 jni_GetStaticObjectField, 3373 jni_GetStaticBooleanField, 3374 jni_GetStaticByteField, 3375 jni_GetStaticCharField, 3376 jni_GetStaticShortField, 3377 jni_GetStaticIntField, 3378 jni_GetStaticLongField, 3379 jni_GetStaticFloatField, 3380 jni_GetStaticDoubleField, 3381 3382 jni_SetStaticObjectField, 3383 jni_SetStaticBooleanField, 3384 jni_SetStaticByteField, 3385 jni_SetStaticCharField, 3386 jni_SetStaticShortField, 3387 jni_SetStaticIntField, 3388 jni_SetStaticLongField, 3389 jni_SetStaticFloatField, 3390 jni_SetStaticDoubleField, 3391 3392 jni_NewString, 3393 jni_GetStringLength, 3394 jni_GetStringChars, 3395 jni_ReleaseStringChars, 3396 3397 jni_NewStringUTF, 3398 jni_GetStringUTFLength, 3399 jni_GetStringUTFChars, 3400 jni_ReleaseStringUTFChars, 3401 3402 jni_GetArrayLength, 3403 3404 jni_NewObjectArray, 3405 jni_GetObjectArrayElement, 3406 jni_SetObjectArrayElement, 3407 3408 jni_NewBooleanArray, 3409 jni_NewByteArray, 3410 jni_NewCharArray, 3411 jni_NewShortArray, 3412 jni_NewIntArray, 3413 jni_NewLongArray, 3414 jni_NewFloatArray, 3415 jni_NewDoubleArray, 3416 3417 jni_GetBooleanArrayElements, 3418 jni_GetByteArrayElements, 3419 jni_GetCharArrayElements, 3420 jni_GetShortArrayElements, 3421 jni_GetIntArrayElements, 3422 jni_GetLongArrayElements, 3423 jni_GetFloatArrayElements, 3424 jni_GetDoubleArrayElements, 3425 3426 jni_ReleaseBooleanArrayElements, 3427 jni_ReleaseByteArrayElements, 3428 jni_ReleaseCharArrayElements, 3429 jni_ReleaseShortArrayElements, 3430 jni_ReleaseIntArrayElements, 3431 jni_ReleaseLongArrayElements, 3432 jni_ReleaseFloatArrayElements, 3433 jni_ReleaseDoubleArrayElements, 3434 3435 jni_GetBooleanArrayRegion, 3436 jni_GetByteArrayRegion, 3437 jni_GetCharArrayRegion, 3438 jni_GetShortArrayRegion, 3439 jni_GetIntArrayRegion, 3440 jni_GetLongArrayRegion, 3441 jni_GetFloatArrayRegion, 3442 jni_GetDoubleArrayRegion, 3443 3444 jni_SetBooleanArrayRegion, 3445 jni_SetByteArrayRegion, 3446 jni_SetCharArrayRegion, 3447 jni_SetShortArrayRegion, 3448 jni_SetIntArrayRegion, 3449 jni_SetLongArrayRegion, 3450 jni_SetFloatArrayRegion, 3451 jni_SetDoubleArrayRegion, 3452 3453 jni_RegisterNatives, 3454 jni_UnregisterNatives, 3455 3456 jni_MonitorEnter, 3457 jni_MonitorExit, 3458 3459 jni_GetJavaVM, 3460 3461 jni_GetStringRegion, 3462 jni_GetStringUTFRegion, 3463 3464 jni_GetPrimitiveArrayCritical, 3465 jni_ReleasePrimitiveArrayCritical, 3466 3467 jni_GetStringCritical, 3468 jni_ReleaseStringCritical, 3469 3470 jni_NewWeakGlobalRef, 3471 jni_DeleteWeakGlobalRef, 3472 3473 jni_ExceptionCheck, 3474 3475 jni_NewDirectByteBuffer, 3476 jni_GetDirectBufferAddress, 3477 jni_GetDirectBufferCapacity, 3478 3479 // New 1_6 features 3480 3481 jni_GetObjectRefType, 3482 3483 // Module features 3484 3485 jni_GetModule, 3486 3487 // Virtual threads 3488 3489 jni_IsVirtualThread 3490 }; 3491 3492 3493 // For jvmti use to modify jni function table. 3494 // Java threads in native contiues to run until it is transitioned 3495 // to VM at safepoint. Before the transition or before it is blocked 3496 // for safepoint it may access jni function table. VM could crash if 3497 // any java thread access the jni function table in the middle of memcpy. 3498 // To avoid this each function pointers are copied automically. 3499 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3500 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3501 intptr_t *a = (intptr_t *) jni_functions(); 3502 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3503 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3504 Atomic::store(a++, *b++); 3505 } 3506 } 3507 3508 void quicken_jni_functions() { 3509 // Replace Get<Primitive>Field with fast versions 3510 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) { 3511 address func; 3512 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3513 if (func != (address)-1) { 3514 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3515 } 3516 func = JNI_FastGetField::generate_fast_get_byte_field(); 3517 if (func != (address)-1) { 3518 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3519 } 3520 func = JNI_FastGetField::generate_fast_get_char_field(); 3521 if (func != (address)-1) { 3522 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3523 } 3524 func = JNI_FastGetField::generate_fast_get_short_field(); 3525 if (func != (address)-1) { 3526 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3527 } 3528 func = JNI_FastGetField::generate_fast_get_int_field(); 3529 if (func != (address)-1) { 3530 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3531 } 3532 func = JNI_FastGetField::generate_fast_get_long_field(); 3533 if (func != (address)-1) { 3534 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3535 } 3536 func = JNI_FastGetField::generate_fast_get_float_field(); 3537 if (func != (address)-1) { 3538 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3539 } 3540 func = JNI_FastGetField::generate_fast_get_double_field(); 3541 if (func != (address)-1) { 3542 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3543 } 3544 } 3545 } 3546 3547 // Returns the function structure 3548 struct JNINativeInterface_* jni_functions() { 3549 #if INCLUDE_JNI_CHECK 3550 if (CheckJNICalls) return jni_functions_check(); 3551 #endif // INCLUDE_JNI_CHECK 3552 return &jni_NativeInterface; 3553 } 3554 3555 // Returns the function structure 3556 struct JNINativeInterface_* jni_functions_nocheck() { 3557 return &jni_NativeInterface; 3558 } 3559 3560 3561 // Invocation API 3562 3563 3564 // Forward declaration 3565 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3566 3567 // Global invocation API vars 3568 enum VM_Creation_State { 3569 NOT_CREATED = 0, 3570 IN_PROGRESS, // Most JNI operations are permitted during this phase to 3571 // allow for initialization actions by libraries and agents. 3572 COMPLETE 3573 }; 3574 3575 volatile VM_Creation_State vm_created = NOT_CREATED; 3576 3577 // Indicate whether it is safe to recreate VM. Recreation is only 3578 // possible after a failed initial creation attempt in some cases. 3579 volatile int safe_to_recreate_vm = 1; 3580 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3581 3582 3583 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3584 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3585 3586 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3587 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3588 3589 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3590 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3591 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3592 jint ret = JNI_ERR; 3593 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3594 3595 if (Threads::is_supported_jni_version(args->version)) { 3596 ret = JNI_OK; 3597 } 3598 // 1.1 style no longer supported in hotspot. 3599 // According the JNI spec, we should update args->version on return. 3600 // We also use the structure to communicate with launcher about default 3601 // stack size. 3602 if (args->version == JNI_VERSION_1_1) { 3603 args->version = JNI_VERSION_1_2; 3604 // javaStackSize is int in arguments structure 3605 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3606 args->javaStackSize = (jint)(ThreadStackSize * K); 3607 } 3608 return ret; 3609 } 3610 3611 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3612 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3613 3614 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3615 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3616 3617 jint result = JNI_ERR; 3618 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3619 3620 // We're about to use Atomic::xchg for synchronization. Some Zero 3621 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3622 // but __sync_lock_test_and_set is not guaranteed to do what we want 3623 // on all architectures. So we check it works before relying on it. 3624 #if defined(ZERO) && defined(ASSERT) 3625 { 3626 jint a = 0xcafebabe; 3627 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3628 void *c = &a; 3629 void *d = Atomic::xchg(&c, &b); 3630 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3631 assert(c == &b && d == &a, "Atomic::xchg() works"); 3632 } 3633 #endif // ZERO && ASSERT 3634 3635 // At the moment it's only possible to have one Java VM, 3636 // since some of the runtime state is in global variables. 3637 3638 // We cannot use our mutex locks here, since they only work on 3639 // Threads. We do an atomic compare and exchange to ensure only 3640 // one thread can call this method at a time 3641 3642 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3643 // the add/dec implementations are dependent on whether we are running 3644 // on a multiprocessor Atomic::xchg does not have this problem. 3645 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) { 3646 return JNI_EEXIST; // already created, or create attempt in progress 3647 } 3648 3649 // If a previous creation attempt failed but can be retried safely, 3650 // then safe_to_recreate_vm will have been reset to 1 after being 3651 // cleared here. If a previous creation attempt succeeded and we then 3652 // destroyed that VM, we will be prevented from trying to recreate 3653 // the VM in the same process, as the value will still be 0. 3654 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3655 return JNI_ERR; 3656 } 3657 3658 /** 3659 * Certain errors during initialization are recoverable and do not 3660 * prevent this method from being called again at a later time 3661 * (perhaps with different arguments). However, at a certain 3662 * point during initialization if an error occurs we cannot allow 3663 * this function to be called again (or it will crash). In those 3664 * situations, the 'canTryAgain' flag is set to false, which atomically 3665 * sets safe_to_recreate_vm to 1, such that any new call to 3666 * JNI_CreateJavaVM will immediately fail using the above logic. 3667 */ 3668 bool can_try_again = true; 3669 3670 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3671 if (result == JNI_OK) { 3672 JavaThread *thread = JavaThread::current(); 3673 assert(!thread->has_pending_exception(), "should have returned not OK"); 3674 // thread is thread_in_vm here 3675 *vm = (JavaVM *)(&main_vm); 3676 *(JNIEnv**)penv = thread->jni_environment(); 3677 // mark creation complete for other JNI ops 3678 Atomic::release_store(&vm_created, COMPLETE); 3679 3680 #if INCLUDE_JVMCI 3681 if (EnableJVMCI) { 3682 if (UseJVMCICompiler) { 3683 // JVMCI is initialized on a CompilerThread 3684 if (BootstrapJVMCI) { 3685 JavaThread* THREAD = thread; // For exception macros. 3686 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3687 compiler->bootstrap(THREAD); 3688 if (HAS_PENDING_EXCEPTION) { 3689 HandleMark hm(THREAD); 3690 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3691 } 3692 } 3693 } 3694 } 3695 #endif 3696 3697 // Notify JVMTI 3698 if (JvmtiExport::should_post_thread_life()) { 3699 JvmtiExport::post_thread_start(thread); 3700 } 3701 3702 JFR_ONLY(Jfr::on_thread_start(thread);) 3703 3704 if (ReplayCompiles) ciReplay::replay(thread); 3705 3706 #ifdef ASSERT 3707 // Some platforms (like Win*) need a wrapper around these test 3708 // functions in order to properly handle error conditions. 3709 if (ErrorHandlerTest != 0) { 3710 VMError::controlled_crash(ErrorHandlerTest); 3711 } 3712 #endif 3713 3714 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3715 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3716 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3717 } else { 3718 // If create_vm exits because of a pending exception, exit with that 3719 // exception. In the future when we figure out how to reclaim memory, 3720 // we may be able to exit with JNI_ERR and allow the calling application 3721 // to continue. 3722 if (Universe::is_fully_initialized()) { 3723 // otherwise no pending exception possible - VM will already have aborted 3724 Thread* current = Thread::current_or_null(); 3725 if (current != nullptr) { 3726 JavaThread* THREAD = JavaThread::cast(current); // For exception macros. 3727 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists"); 3728 HandleMark hm(THREAD); 3729 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3730 } 3731 } 3732 3733 if (can_try_again) { 3734 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3735 safe_to_recreate_vm = 1; 3736 } 3737 3738 // Creation failed. We must reset vm_created 3739 *vm = 0; 3740 *(JNIEnv**)penv = 0; 3741 // reset vm_created last to avoid race condition. Use OrderAccess to 3742 // control both compiler and architectural-based reordering. 3743 assert(vm_created == IN_PROGRESS, "must be"); 3744 Atomic::release_store(&vm_created, NOT_CREATED); 3745 } 3746 3747 // Flush stdout and stderr before exit. 3748 fflush(stdout); 3749 fflush(stderr); 3750 3751 return result; 3752 3753 } 3754 3755 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3756 jint result = JNI_ERR; 3757 // On Windows, let CreateJavaVM run with SEH protection 3758 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3759 __try { 3760 #endif 3761 result = JNI_CreateJavaVM_inner(vm, penv, args); 3762 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3763 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3764 // Nothing to do. 3765 } 3766 #endif 3767 return result; 3768 } 3769 3770 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3771 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3772 3773 if (vm_created == COMPLETE) { 3774 if (numVMs != nullptr) *numVMs = 1; 3775 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3776 } else { 3777 if (numVMs != nullptr) *numVMs = 0; 3778 } 3779 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3780 return JNI_OK; 3781 } 3782 3783 extern "C" { 3784 3785 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3786 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3787 3788 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3789 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3790 jint res = JNI_ERR; 3791 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3792 3793 if (vm_created == NOT_CREATED) { 3794 res = JNI_ERR; 3795 return res; 3796 } 3797 3798 JNIEnv *env; 3799 JavaVMAttachArgs destroyargs; 3800 destroyargs.version = CurrentVersion; 3801 destroyargs.name = (char *)"DestroyJavaVM"; 3802 destroyargs.group = nullptr; 3803 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3804 if (res != JNI_OK) { 3805 return res; 3806 } 3807 3808 JavaThread* thread = JavaThread::current(); 3809 3810 // Make sure we are actually in a newly attached thread, with no 3811 // existing Java frame. 3812 if (thread->has_last_Java_frame()) { 3813 return JNI_ERR; 3814 } 3815 3816 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3817 3818 // We are going to VM, change W^X state to the expected one. 3819 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite)); 3820 3821 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3822 Threads::destroy_vm(); 3823 // Don't bother restoring thread state, VM is gone. 3824 vm_created = NOT_CREATED; 3825 return JNI_OK; 3826 } 3827 3828 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3829 jint result = JNI_ERR; 3830 // On Windows, we need SEH protection 3831 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3832 __try { 3833 #endif 3834 result = jni_DestroyJavaVM_inner(vm); 3835 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3836 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3837 // Nothing to do. 3838 } 3839 #endif 3840 return result; 3841 } 3842 3843 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3844 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3845 3846 // Check below commented out from JDK1.2fcs as well 3847 /* 3848 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3849 return JNI_EVERSION; 3850 } 3851 */ 3852 3853 Thread* t = Thread::current_or_null(); 3854 if (t != nullptr) { 3855 // If executing from an atexit hook we may be in the VMThread. 3856 if (t->is_Java_thread()) { 3857 // If the thread has been attached this operation is a no-op 3858 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment(); 3859 return JNI_OK; 3860 } else { 3861 return JNI_ERR; 3862 } 3863 } 3864 3865 // Create a thread and mark it as attaching so it will be skipped by the 3866 // ThreadsListEnumerator - see CR 6404306 3867 JavaThread* thread = new JavaThread(true); 3868 3869 // Set correct safepoint info. The thread is going to call into Java when 3870 // initializing the Java level thread object. Hence, the correct state must 3871 // be set in order for the Safepoint code to deal with it correctly. 3872 thread->set_thread_state(_thread_in_vm); 3873 thread->record_stack_base_and_size(); 3874 thread->register_thread_stack_with_NMT(); 3875 thread->initialize_thread_current(); 3876 MACOS_AARCH64_ONLY(thread->init_wx()); 3877 3878 if (!os::create_attached_thread(thread)) { 3879 thread->smr_delete(); 3880 return JNI_ERR; 3881 } 3882 // Enable stack overflow checks 3883 thread->stack_overflow_state()->create_stack_guard_pages(); 3884 3885 thread->initialize_tlab(); 3886 3887 thread->cache_global_variables(); 3888 3889 // This thread will not do a safepoint check, since it has 3890 // not been added to the Thread list yet. 3891 { MutexLocker ml(Threads_lock); 3892 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3893 // avoid this thread trying to do a GC before it is added to the thread-list 3894 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3895 Threads::add(thread, daemon); 3896 } 3897 // Create thread group and name info from attach arguments 3898 oop group = nullptr; 3899 char* thread_name = nullptr; 3900 if (args != nullptr && Threads::is_supported_jni_version(args->version)) { 3901 group = JNIHandles::resolve(args->group); 3902 thread_name = args->name; // may be null 3903 } 3904 if (group == nullptr) group = Universe::main_thread_group(); 3905 3906 // Create Java level thread object and attach it to this thread 3907 bool attach_failed = false; 3908 { 3909 EXCEPTION_MARK; 3910 HandleMark hm(THREAD); 3911 Handle thread_group(THREAD, group); 3912 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3913 if (HAS_PENDING_EXCEPTION) { 3914 CLEAR_PENDING_EXCEPTION; 3915 // cleanup outside the handle mark. 3916 attach_failed = true; 3917 } 3918 } 3919 3920 if (attach_failed) { 3921 // Added missing cleanup 3922 thread->cleanup_failed_attach_current_thread(daemon); 3923 return JNI_ERR; 3924 } 3925 3926 // mark the thread as no longer attaching 3927 // this uses a fence to push the change through so we don't have 3928 // to regrab the threads_lock 3929 thread->set_done_attaching_via_jni(); 3930 3931 // Set java thread status. 3932 java_lang_Thread::set_thread_status(thread->threadObj(), 3933 JavaThreadStatus::RUNNABLE); 3934 3935 // Notify the debugger 3936 if (JvmtiExport::should_post_thread_life()) { 3937 JvmtiExport::post_thread_start(thread); 3938 } 3939 3940 JFR_ONLY(Jfr::on_thread_start(thread);) 3941 3942 *(JNIEnv**)penv = thread->jni_environment(); 3943 3944 // Now leaving the VM, so change thread_state. This is normally automatically taken care 3945 // of in the JVM_ENTRY. But in this situation we have to do it manually. 3946 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3947 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3948 3949 // Perform any platform dependent FPU setup 3950 os::setup_fpu(); 3951 3952 return JNI_OK; 3953 } 3954 3955 3956 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 3957 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 3958 if (vm_created == NOT_CREATED) { 3959 // Not sure how we could possibly get here. 3960 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3961 return JNI_ERR; 3962 } 3963 3964 jint ret = attach_current_thread(vm, penv, _args, false); 3965 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 3966 return ret; 3967 } 3968 3969 3970 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 3971 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 3972 if (vm_created == NOT_CREATED) { 3973 // Not sure how we could possibly get here. 3974 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 3975 return JNI_ERR; 3976 } 3977 3978 Thread* current = Thread::current_or_null(); 3979 3980 // If the thread has already been detached the operation is a no-op 3981 if (current == nullptr) { 3982 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 3983 return JNI_OK; 3984 } 3985 3986 // If executing from an atexit hook we may be in the VMThread. 3987 if (!current->is_Java_thread()) { 3988 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3989 return JNI_ERR; 3990 } 3991 3992 VM_Exit::block_if_vm_exited(); 3993 3994 JavaThread* thread = JavaThread::cast(current); 3995 if (thread->has_last_Java_frame()) { 3996 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3997 // Can't detach a thread that's running java, that can't work. 3998 return JNI_ERR; 3999 } 4000 4001 // We are going to VM, change W^X state to the expected one. 4002 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite)); 4003 4004 // Safepoint support. Have to do call-back to safepoint code, if in the 4005 // middle of a safepoint operation 4006 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4007 4008 // XXX: Note that JavaThread::exit() call below removes the guards on the 4009 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4010 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4011 // of the guards is visible in jni_AttachCurrentThread above, 4012 // the removal of the guards is buried below in JavaThread::exit() 4013 // here. The abstraction should be more symmetrically either exposed 4014 // or hidden (e.g. it could probably be hidden in the same 4015 // (platform-dependent) methods where we do alternate stack 4016 // maintenance work?) 4017 thread->exit(false, JavaThread::jni_detach); 4018 thread->smr_delete(); 4019 4020 // Go to the execute mode, the initial state of the thread on creation. 4021 // Use os interface as the thread is not a JavaThread anymore. 4022 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec)); 4023 4024 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4025 return JNI_OK; 4026 } 4027 4028 DT_RETURN_MARK_DECL(GetEnv, jint 4029 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4030 4031 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4032 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4033 jint ret = JNI_ERR; 4034 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4035 4036 if (vm_created == NOT_CREATED) { 4037 *penv = nullptr; 4038 ret = JNI_EDETACHED; 4039 return ret; 4040 } 4041 4042 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4043 return ret; 4044 } 4045 4046 #ifndef JVMPI_VERSION_1 4047 // need these in order to be polite about older agents 4048 #define JVMPI_VERSION_1 ((jint)0x10000001) 4049 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4050 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4051 #endif // !JVMPI_VERSION_1 4052 4053 Thread* thread = Thread::current_or_null(); 4054 if (thread != nullptr && thread->is_Java_thread()) { 4055 if (Threads::is_supported_jni_version_including_1_1(version)) { 4056 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment(); 4057 ret = JNI_OK; 4058 return ret; 4059 4060 } else if (version == JVMPI_VERSION_1 || 4061 version == JVMPI_VERSION_1_1 || 4062 version == JVMPI_VERSION_1_2) { 4063 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4064 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4065 ret = JNI_EVERSION; 4066 return ret; 4067 } else if (JvmtiExport::is_jvmdi_version(version)) { 4068 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4069 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4070 ret = JNI_EVERSION; 4071 return ret; 4072 } else { 4073 *penv = nullptr; 4074 ret = JNI_EVERSION; 4075 return ret; 4076 } 4077 } else { 4078 *penv = nullptr; 4079 ret = JNI_EDETACHED; 4080 return ret; 4081 } 4082 } 4083 4084 4085 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4086 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4087 if (vm_created == NOT_CREATED) { 4088 // Not sure how we could possibly get here. 4089 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4090 return JNI_ERR; 4091 } 4092 4093 jint ret = attach_current_thread(vm, penv, _args, true); 4094 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4095 return ret; 4096 } 4097 4098 4099 } // End extern "C" 4100 4101 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4102 nullptr, 4103 nullptr, 4104 nullptr, 4105 4106 jni_DestroyJavaVM, 4107 jni_AttachCurrentThread, 4108 jni_DetachCurrentThread, 4109 jni_GetEnv, 4110 jni_AttachCurrentThreadAsDaemon 4111 };