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 "oops/access.inline.hpp" 56 #include "oops/arrayOop.hpp" 57 #include "oops/flatArrayOop.inline.hpp" 58 #include "oops/inlineKlass.inline.hpp" 59 #include "oops/instanceKlass.inline.hpp" 60 #include "oops/instanceOop.hpp" 61 #include "oops/klass.inline.hpp" 62 #include "oops/markWord.hpp" 63 #include "oops/method.hpp" 64 #include "oops/objArrayKlass.hpp" 65 #include "oops/objArrayOop.inline.hpp" 66 #include "oops/oop.inline.hpp" 67 #include "oops/symbol.hpp" 68 #include "oops/typeArrayKlass.hpp" 69 #include "oops/typeArrayOop.inline.hpp" 70 #include "prims/jniCheck.hpp" 71 #include "prims/jniExport.hpp" 72 #include "prims/jniFastGetField.hpp" 73 #include "prims/jvm_misc.hpp" 74 #include "prims/jvmtiExport.hpp" 75 #include "prims/jvmtiThreadState.hpp" 76 #include "runtime/arguments.hpp" 77 #include "runtime/atomic.hpp" 78 #include "runtime/fieldDescriptor.inline.hpp" 79 #include "runtime/handles.inline.hpp" 80 #include "runtime/interfaceSupport.inline.hpp" 81 #include "runtime/java.hpp" 82 #include "runtime/javaCalls.hpp" 83 #include "runtime/javaThread.inline.hpp" 84 #include "runtime/jfieldIDWorkaround.hpp" 85 #include "runtime/jniHandles.inline.hpp" 86 #include "runtime/reflection.hpp" 87 #include "runtime/safepointVerifiers.hpp" 88 #include "runtime/sharedRuntime.hpp" 89 #include "runtime/signature.hpp" 90 #include "runtime/synchronizer.hpp" 91 #include "runtime/thread.inline.hpp" 92 #include "runtime/vmOperations.hpp" 93 #include "services/memTracker.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 intptr_t 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, intptr_t 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 intptr_t 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 intptr_t 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 intptr_t 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() || m->is_static_vnew_factory()) { 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; 507 if (sub_klass == super_klass && sub_klass->is_inline_klass()) { 508 // val type is a subtype of ref type 509 InlineKlass* ik = InlineKlass::cast(sub_klass); 510 if (sub_mirror == super_mirror || (ik->val_mirror() == sub_mirror && ik->ref_mirror() == super_mirror)) { 511 ret = JNI_TRUE; 512 } else { 513 ret = JNI_FALSE; 514 } 515 } else { 516 ret = sub_klass->is_subtype_of(super_klass) ? JNI_TRUE : JNI_FALSE; 517 } 518 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 519 return ret; 520 JNI_END 521 522 523 DT_RETURN_MARK_DECL(Throw, jint 524 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 525 526 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 527 HOTSPOT_JNI_THROW_ENTRY(env, obj); 528 529 jint ret = JNI_OK; 530 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 531 532 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 533 ShouldNotReachHere(); 534 return 0; // Mute compiler. 535 JNI_END 536 537 538 DT_RETURN_MARK_DECL(ThrowNew, jint 539 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 540 541 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 542 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 543 544 jint ret = JNI_OK; 545 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 546 547 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 548 Symbol* name = k->name(); 549 Handle class_loader (THREAD, k->class_loader()); 550 Handle protection_domain (THREAD, k->protection_domain()); 551 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 552 ShouldNotReachHere(); 553 return 0; // Mute compiler. 554 JNI_END 555 556 557 // JNI functions only transform a pending async exception to a synchronous 558 // exception in ExceptionOccurred and ExceptionCheck calls, since 559 // delivering an async exception in other places won't change the native 560 // code's control flow and would be harmful when native code further calls 561 // JNI functions with a pending exception. Async exception is also checked 562 // during the call, so ExceptionOccurred/ExceptionCheck won't return 563 // false but deliver the async exception at the very end during 564 // state transition. 565 566 static void jni_check_async_exceptions(JavaThread *thread) { 567 assert(thread == Thread::current(), "must be itself"); 568 if (thread->has_async_exception_condition()) { 569 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */); 570 } 571 } 572 573 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 574 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 575 576 jni_check_async_exceptions(thread); 577 oop exception = thread->pending_exception(); 578 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception); 579 580 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 581 return ret; 582 JNI_END 583 584 585 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 586 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 587 588 if (thread->has_pending_exception()) { 589 Handle ex(thread, thread->pending_exception()); 590 thread->clear_pending_exception(); 591 jio_fprintf(defaultStream::error_stream(), "Exception "); 592 if (thread != nullptr && thread->threadObj() != nullptr) { 593 ResourceMark rm(THREAD); 594 jio_fprintf(defaultStream::error_stream(), 595 "in thread \"%s\" ", thread->name()); 596 } 597 if (ex->is_a(vmClasses::Throwable_klass())) { 598 JavaValue result(T_VOID); 599 JavaCalls::call_virtual(&result, 600 ex, 601 vmClasses::Throwable_klass(), 602 vmSymbols::printStackTrace_name(), 603 vmSymbols::void_method_signature(), 604 THREAD); 605 // If an exception is thrown in the call it gets thrown away. Not much 606 // we can do with it. The native code that calls this, does not check 607 // for the exception - hence, it might still be in the thread when DestroyVM gets 608 // called, potentially causing a few asserts to trigger - since no pending exception 609 // is expected. 610 CLEAR_PENDING_EXCEPTION; 611 } else { 612 ResourceMark rm(THREAD); 613 jio_fprintf(defaultStream::error_stream(), 614 ". Uncaught exception of type %s.", 615 ex->klass()->external_name()); 616 } 617 } 618 619 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 620 JNI_END 621 622 623 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env)) 624 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 625 626 // The jni code might be using this API to clear java thrown exception. 627 // So just mark jvmti thread exception state as exception caught. 628 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 629 if (state != nullptr && state->is_exception_detected()) { 630 state->set_exception_caught(); 631 } 632 thread->clear_pending_exception(); 633 634 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 635 JNI_END 636 637 638 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 639 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 640 641 tty->print_cr("FATAL ERROR in native method: %s", msg); 642 thread->print_jni_stack(); 643 os::abort(); // Dump core and abort 644 JNI_END 645 646 647 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 648 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 649 650 //%note jni_11 651 if (capacity < 0 || 652 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 653 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 654 return JNI_ERR; 655 } 656 657 thread->push_jni_handle_block(); 658 jint ret = JNI_OK; 659 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 660 return ret; 661 JNI_END 662 663 664 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 665 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 666 667 //%note jni_11 668 Handle result_handle(thread, JNIHandles::resolve(result)); 669 JNIHandleBlock* old_handles = thread->active_handles(); 670 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 671 if (new_handles != nullptr) { 672 // As a sanity check we only release the handle blocks if the pop_frame_link is not null. 673 // This way code will still work if PopLocalFrame is called without a corresponding 674 // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise 675 // the release_block call will release the blocks. 676 thread->set_active_handles(new_handles); 677 old_handles->set_pop_frame_link(nullptr); // clear link we won't release new_handles below 678 JNIHandleBlock::release_block(old_handles, thread); // may block 679 result = JNIHandles::make_local(thread, result_handle()); 680 } 681 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 682 return result; 683 JNI_END 684 685 686 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 687 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 688 689 Handle ref_handle(thread, JNIHandles::resolve(ref)); 690 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL); 691 692 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 693 return ret; 694 JNI_END 695 696 // Must be JNI_ENTRY (with HandleMark) 697 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 698 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 699 700 JNIHandles::destroy_global(ref); 701 702 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 703 JNI_END 704 705 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 706 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 707 708 JNIHandles::destroy_local(obj); 709 710 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 711 JNI_END 712 713 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 714 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 715 716 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 717 718 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 719 return ret; 720 JNI_END 721 722 723 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 724 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 725 726 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref), 727 AllocFailStrategy::RETURN_NULL); 728 729 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 730 return ret; 731 JNI_END 732 733 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 734 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 735 736 jint ret; 737 if (capacity >= 0 && 738 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 739 ret = JNI_OK; 740 } else { 741 ret = JNI_ERR; 742 } 743 744 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 745 return ret; 746 JNI_END 747 748 // Return the Handle Type 749 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 750 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 751 752 jobjectRefType ret = JNIInvalidRefType; 753 if (obj != nullptr) { 754 ret = JNIHandles::handle_type(thread, obj); 755 } 756 757 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 758 return ret; 759 JNI_END 760 761 762 class JNI_ArgumentPusher : public SignatureIterator { 763 protected: 764 JavaCallArguments* _arguments; 765 766 void push_int(jint x) { _arguments->push_int(x); } 767 void push_long(jlong x) { _arguments->push_long(x); } 768 void push_float(jfloat x) { _arguments->push_float(x); } 769 void push_double(jdouble x) { _arguments->push_double(x); } 770 void push_object(jobject x) { _arguments->push_jobject(x); } 771 772 void push_boolean(jboolean b) { 773 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 774 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 775 // TemplateInterpreterGenerator::generate_result_handler_for and 776 // SharedRuntime::generate_native_wrapper. 777 push_int(b == 0 ? JNI_FALSE : JNI_TRUE); 778 } 779 780 JNI_ArgumentPusher(Method* method) 781 : SignatureIterator(method->signature(), 782 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint()) 783 { 784 _arguments = nullptr; 785 } 786 787 public: 788 virtual void push_arguments_on(JavaCallArguments* arguments) = 0; 789 }; 790 791 792 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 793 va_list _ap; 794 795 void set_ap(va_list rap) { 796 va_copy(_ap, rap); 797 } 798 799 friend class SignatureIterator; // so do_parameters_on can call do_type 800 void do_type(BasicType type) { 801 switch (type) { 802 // these are coerced to int when using va_arg 803 case T_BYTE: 804 case T_CHAR: 805 case T_SHORT: 806 case T_INT: push_int(va_arg(_ap, jint)); break; 807 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break; 808 809 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 810 811 case T_LONG: push_long(va_arg(_ap, jlong)); break; 812 // float is coerced to double w/ va_arg 813 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break; 814 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break; 815 816 case T_ARRAY: 817 case T_OBJECT: 818 case T_PRIMITIVE_OBJECT: push_object(va_arg(_ap, jobject)); break; 819 default: ShouldNotReachHere(); 820 } 821 } 822 823 public: 824 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 825 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 826 set_ap(rap); 827 } 828 829 ~JNI_ArgumentPusherVaArg() { 830 va_end(_ap); 831 } 832 833 virtual void push_arguments_on(JavaCallArguments* arguments) { 834 _arguments = arguments; 835 do_parameters_on(this); 836 } 837 }; 838 839 840 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 841 protected: 842 const jvalue *_ap; 843 844 inline void set_ap(const jvalue *rap) { _ap = rap; } 845 846 friend class SignatureIterator; // so do_parameters_on can call do_type 847 void do_type(BasicType type) { 848 switch (type) { 849 case T_CHAR: push_int((_ap++)->c); break; 850 case T_SHORT: push_int((_ap++)->s); break; 851 case T_BYTE: push_int((_ap++)->b); break; 852 case T_INT: push_int((_ap++)->i); break; 853 case T_BOOLEAN: push_boolean((_ap++)->z); break; 854 case T_LONG: push_long((_ap++)->j); break; 855 case T_FLOAT: push_float((_ap++)->f); break; 856 case T_DOUBLE: push_double((_ap++)->d); break; 857 case T_ARRAY: 858 case T_OBJECT: 859 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break; 860 default: ShouldNotReachHere(); 861 } 862 } 863 864 public: 865 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 866 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 867 set_ap(rap); 868 } 869 870 virtual void push_arguments_on(JavaCallArguments* arguments) { 871 _arguments = arguments; 872 do_parameters_on(this); 873 } 874 }; 875 876 877 enum JNICallType { 878 JNI_STATIC, 879 JNI_VIRTUAL, 880 JNI_NONVIRTUAL 881 }; 882 883 884 885 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 886 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 887 888 // Create object to hold arguments for the JavaCall, and associate it with 889 // the jni parser 890 ResourceMark rm(THREAD); 891 int number_of_parameters = method->size_of_parameters(); 892 JavaCallArguments java_args(number_of_parameters); 893 894 assert(method->is_static(), "method should be static"); 895 896 // Fill out JavaCallArguments object 897 args->push_arguments_on(&java_args); 898 // Initialize result type 899 result->set_type(args->return_type()); 900 901 // Invoke the method. Result is returned as oop. 902 JavaCalls::call(result, method, &java_args, CHECK); 903 904 // Convert result 905 if (is_reference_type(result->get_type())) { 906 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 907 } 908 } 909 910 911 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 912 oop recv = JNIHandles::resolve(receiver); 913 if (recv == nullptr) { 914 THROW(vmSymbols::java_lang_NullPointerException()); 915 } 916 Handle h_recv(THREAD, recv); 917 918 int number_of_parameters; 919 Method* selected_method; 920 { 921 Method* m = Method::resolve_jmethod_id(method_id); 922 number_of_parameters = m->size_of_parameters(); 923 InstanceKlass* holder = m->method_holder(); 924 if (call_type != JNI_VIRTUAL) { 925 selected_method = m; 926 } else if (!m->has_itable_index()) { 927 // non-interface call -- for that little speed boost, don't handlize 928 debug_only(NoSafepointVerifier nosafepoint;) 929 // jni_GetMethodID makes sure class is linked and initialized 930 // so m should have a valid vtable index. 931 assert(m->valid_vtable_index(), "no valid vtable index"); 932 int vtbl_index = m->vtable_index(); 933 if (vtbl_index != Method::nonvirtual_vtable_index) { 934 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 935 } else { 936 // final method 937 selected_method = m; 938 } 939 } else { 940 // interface call 941 int itbl_index = m->itable_index(); 942 Klass* k = h_recv->klass(); 943 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 944 } 945 } 946 947 methodHandle method(THREAD, selected_method); 948 949 // Create object to hold arguments for the JavaCall, and associate it with 950 // the jni parser 951 ResourceMark rm(THREAD); 952 JavaCallArguments java_args(number_of_parameters); 953 954 // handle arguments 955 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 956 java_args.push_oop(h_recv); // Push jobject handle 957 958 // Fill out JavaCallArguments object 959 args->push_arguments_on(&java_args); 960 // Initialize result type 961 result->set_type(args->return_type()); 962 963 // Invoke the method. Result is returned as oop. 964 JavaCalls::call(result, method, &java_args, CHECK); 965 966 // Convert result 967 if (is_reference_type(result->get_type())) { 968 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 969 } 970 } 971 972 DT_RETURN_MARK_DECL(AllocObject, jobject 973 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 974 975 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 976 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 977 978 jobject ret = nullptr; 979 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 980 981 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 982 ret = JNIHandles::make_local(THREAD, i); 983 return ret; 984 JNI_END 985 986 DT_RETURN_MARK_DECL(NewObjectA, jobject 987 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 988 989 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 990 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 991 992 jobject obj = nullptr; 993 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj); 994 995 oop clazzoop = JNIHandles::resolve_non_null(clazz); 996 Klass* k = java_lang_Class::as_Klass(clazzoop); 997 if (k == nullptr) { 998 ResourceMark rm(THREAD); 999 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1000 } 1001 1002 if (!k->is_inline_klass()) { 1003 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1004 obj = JNIHandles::make_local(THREAD, i); 1005 JavaValue jvalue(T_VOID); 1006 JNI_ArgumentPusherArray ap(methodID, args); 1007 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1008 } else { 1009 JavaValue jvalue(T_PRIMITIVE_OBJECT); 1010 JNI_ArgumentPusherArray ap(methodID, args); 1011 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_NULL); 1012 obj = jvalue.get_jobject(); 1013 } 1014 return obj; 1015 JNI_END 1016 1017 1018 DT_RETURN_MARK_DECL(NewObjectV, jobject 1019 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1020 1021 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1022 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1023 1024 jobject obj = nullptr; 1025 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1026 1027 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1028 Klass* k = java_lang_Class::as_Klass(clazzoop); 1029 if (k == nullptr) { 1030 ResourceMark rm(THREAD); 1031 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1032 } 1033 1034 if (!k->is_inline_klass()) { 1035 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1036 obj = JNIHandles::make_local(THREAD, i); 1037 JavaValue jvalue(T_VOID); 1038 JNI_ArgumentPusherVaArg ap(methodID, args); 1039 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1040 } else { 1041 JavaValue jvalue(T_PRIMITIVE_OBJECT); 1042 JNI_ArgumentPusherVaArg ap(methodID, args); 1043 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_NULL); 1044 obj = jvalue.get_jobject(); 1045 } 1046 return obj; 1047 JNI_END 1048 1049 1050 DT_RETURN_MARK_DECL(NewObject, jobject 1051 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1052 1053 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1054 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1055 1056 jobject obj = nullptr; 1057 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1058 1059 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1060 Klass* k = java_lang_Class::as_Klass(clazzoop); 1061 if (k == nullptr) { 1062 ResourceMark rm(THREAD); 1063 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr); 1064 } 1065 1066 if (!k->is_inline_klass()) { 1067 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1068 obj = JNIHandles::make_local(THREAD, i); 1069 va_list args; 1070 va_start(args, methodID); 1071 JavaValue jvalue(T_VOID); 1072 JNI_ArgumentPusherVaArg ap(methodID, args); 1073 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1074 va_end(args); 1075 } else { 1076 va_list args; 1077 va_start(args, methodID); 1078 JavaValue jvalue(T_PRIMITIVE_OBJECT); 1079 JNI_ArgumentPusherVaArg ap(methodID, args); 1080 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_NULL); 1081 va_end(args); 1082 obj = jvalue.get_jobject(); 1083 } 1084 return obj; 1085 JNI_END 1086 1087 1088 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1089 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1090 1091 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1092 jclass ret = 1093 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1094 1095 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1096 return ret; 1097 JNI_END 1098 1099 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1100 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1101 1102 jboolean ret = JNI_TRUE; 1103 if (obj != nullptr) { 1104 ret = JNI_FALSE; 1105 Klass* k = java_lang_Class::as_Klass( 1106 JNIHandles::resolve_non_null(clazz)); 1107 if (k != nullptr) { 1108 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1109 } 1110 } 1111 1112 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1113 return ret; 1114 JNI_END 1115 1116 1117 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1118 const char *sig, bool is_static, TRAPS) { 1119 // %%%% This code should probably just call into a method in the LinkResolver 1120 // 1121 // The class should have been loaded (we have an instance of the class 1122 // passed in) so the method and signature should already be in the symbol 1123 // table. If they're not there, the method doesn't exist. 1124 const char *name_to_probe = (name_str == nullptr) 1125 ? vmSymbols::object_initializer_name()->as_C_string() 1126 : name_str; 1127 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1128 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1129 1130 if (name == nullptr || signature == nullptr) { 1131 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1132 } 1133 1134 oop mirror = JNIHandles::resolve_non_null(clazz); 1135 Klass* klass = java_lang_Class::as_Klass(mirror); 1136 1137 // Throw a NoSuchMethodError exception if we have an instance of a 1138 // primitive java.lang.Class 1139 if (java_lang_Class::is_primitive(mirror)) { 1140 ResourceMark rm(THREAD); 1141 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1142 } 1143 1144 // Make sure class is linked and initialized before handing id's out to 1145 // Method*s. 1146 klass->initialize(CHECK_NULL); 1147 1148 Method* m; 1149 if (name == vmSymbols::object_initializer_name() || 1150 name == vmSymbols::class_initializer_name()) { 1151 // Never search superclasses for constructors 1152 if (klass->is_instance_klass()) { 1153 m = InstanceKlass::cast(klass)->find_method(name, signature); 1154 } else { 1155 m = nullptr; 1156 } 1157 } else { 1158 m = klass->lookup_method(name, signature); 1159 if (m == nullptr && klass->is_instance_klass()) { 1160 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1161 } 1162 } 1163 if (m == nullptr || (m->is_static() != is_static)) { 1164 ResourceMark rm(THREAD); 1165 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1166 } 1167 return m->jmethod_id(); 1168 } 1169 1170 1171 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1172 const char *name, const char *sig)) 1173 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1174 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1175 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1176 return ret; 1177 JNI_END 1178 1179 1180 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1181 const char *name, const char *sig)) 1182 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1183 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1184 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1185 return ret; 1186 JNI_END 1187 1188 1189 1190 // 1191 // Calling Methods 1192 // 1193 1194 1195 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1196 , EntryProbe, ReturnProbe) \ 1197 \ 1198 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1199 , ReturnProbe); \ 1200 \ 1201 JNI_ENTRY(ResultType, \ 1202 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1203 \ 1204 EntryProbe; \ 1205 ResultType ret = 0;\ 1206 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1207 (const ResultType&)ret);\ 1208 \ 1209 va_list args; \ 1210 va_start(args, methodID); \ 1211 JavaValue jvalue(Tag); \ 1212 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1213 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1214 va_end(args); \ 1215 ret = jvalue.get_##ResultType(); \ 1216 return ret;\ 1217 JNI_END 1218 1219 // the runtime type of subword integral basic types is integer 1220 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1221 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1222 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1223 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1224 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1225 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1226 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1227 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1228 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1229 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1230 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1231 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1232 1233 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1234 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1235 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1236 DEFINE_CALLMETHOD(jint, Int, T_INT, 1237 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1238 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1239 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1240 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1241 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1242 // Float and double probes don't return value because dtrace doesn't currently support it 1243 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1244 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1245 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1246 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1247 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1248 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1249 1250 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1251 , EntryProbe, ReturnProbe) \ 1252 \ 1253 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1254 , ReturnProbe); \ 1255 \ 1256 JNI_ENTRY(ResultType, \ 1257 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1258 \ 1259 EntryProbe;\ 1260 ResultType ret = 0;\ 1261 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1262 (const ResultType&)ret);\ 1263 \ 1264 JavaValue jvalue(Tag); \ 1265 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1266 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1267 ret = jvalue.get_##ResultType(); \ 1268 return ret;\ 1269 JNI_END 1270 1271 // the runtime type of subword integral basic types is integer 1272 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1273 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1274 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1275 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1276 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1277 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1278 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1279 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1280 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1281 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1282 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1283 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1284 1285 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1286 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1287 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1288 DEFINE_CALLMETHODV(jint, Int, T_INT, 1289 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1290 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1291 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1292 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1293 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1294 // Float and double probes don't return value because dtrace doesn't currently support it 1295 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1296 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1297 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1298 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1299 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1300 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1301 1302 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1303 , EntryProbe, ReturnProbe) \ 1304 \ 1305 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1306 , ReturnProbe); \ 1307 \ 1308 JNI_ENTRY(ResultType, \ 1309 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1310 EntryProbe; \ 1311 ResultType ret = 0;\ 1312 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1313 (const ResultType&)ret);\ 1314 \ 1315 JavaValue jvalue(Tag); \ 1316 JNI_ArgumentPusherArray ap(methodID, args); \ 1317 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1318 ret = jvalue.get_##ResultType(); \ 1319 return ret;\ 1320 JNI_END 1321 1322 // the runtime type of subword integral basic types is integer 1323 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1324 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1325 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1326 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1327 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1328 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1329 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1330 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1331 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1332 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1333 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1334 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1335 1336 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1337 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1338 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1339 DEFINE_CALLMETHODA(jint, Int, T_INT, 1340 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1341 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1342 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1343 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1344 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1345 // Float and double probes don't return value because dtrace doesn't currently support it 1346 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1347 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1348 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1349 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1350 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1351 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1352 1353 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1354 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1355 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1356 1357 1358 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1359 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1360 DT_VOID_RETURN_MARK(CallVoidMethod); 1361 1362 va_list args; 1363 va_start(args, methodID); 1364 JavaValue jvalue(T_VOID); 1365 JNI_ArgumentPusherVaArg ap(methodID, args); 1366 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1367 va_end(args); 1368 JNI_END 1369 1370 1371 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1372 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1373 DT_VOID_RETURN_MARK(CallVoidMethodV); 1374 1375 JavaValue jvalue(T_VOID); 1376 JNI_ArgumentPusherVaArg ap(methodID, args); 1377 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1378 JNI_END 1379 1380 1381 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1382 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1383 DT_VOID_RETURN_MARK(CallVoidMethodA); 1384 1385 JavaValue jvalue(T_VOID); 1386 JNI_ArgumentPusherArray ap(methodID, args); 1387 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1388 JNI_END 1389 1390 1391 1392 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1393 , EntryProbe, ReturnProbe) \ 1394 \ 1395 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1396 , ReturnProbe);\ 1397 \ 1398 JNI_ENTRY(ResultType, \ 1399 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1400 \ 1401 EntryProbe;\ 1402 ResultType ret;\ 1403 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1404 (const ResultType&)ret);\ 1405 \ 1406 va_list args; \ 1407 va_start(args, methodID); \ 1408 JavaValue jvalue(Tag); \ 1409 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1410 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1411 va_end(args); \ 1412 ret = jvalue.get_##ResultType(); \ 1413 return ret;\ 1414 JNI_END 1415 1416 // the runtime type of subword integral basic types is integer 1417 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1418 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1419 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1420 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1421 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1422 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1423 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1424 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1425 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1426 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1427 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1428 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1429 1430 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1431 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1432 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1433 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1434 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1435 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1436 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1437 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1438 // Float and double probes don't return value because dtrace doesn't currently support it 1439 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1440 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1441 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1442 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1443 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1444 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1445 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1446 1447 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1448 , EntryProbe, ReturnProbe) \ 1449 \ 1450 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1451 , ReturnProbe);\ 1452 \ 1453 JNI_ENTRY(ResultType, \ 1454 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1455 \ 1456 EntryProbe;\ 1457 ResultType ret;\ 1458 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1459 (const ResultType&)ret);\ 1460 \ 1461 JavaValue jvalue(Tag); \ 1462 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1463 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1464 ret = jvalue.get_##ResultType(); \ 1465 return ret;\ 1466 JNI_END 1467 1468 // the runtime type of subword integral basic types is integer 1469 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1470 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1471 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1472 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1473 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1474 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1475 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1476 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1478 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1479 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1481 1482 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1483 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1484 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1485 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1486 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1488 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1489 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1490 // Float and double probes don't return value because dtrace doesn't currently support it 1491 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1492 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1493 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1494 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1495 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1496 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1497 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1498 1499 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1500 , EntryProbe, ReturnProbe) \ 1501 \ 1502 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1503 , ReturnProbe);\ 1504 \ 1505 JNI_ENTRY(ResultType, \ 1506 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1507 \ 1508 EntryProbe;\ 1509 ResultType ret;\ 1510 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1511 (const ResultType&)ret);\ 1512 \ 1513 JavaValue jvalue(Tag); \ 1514 JNI_ArgumentPusherArray ap(methodID, args); \ 1515 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1516 ret = jvalue.get_##ResultType(); \ 1517 return ret;\ 1518 JNI_END 1519 1520 // the runtime type of subword integral basic types is integer 1521 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1522 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1523 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1524 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1525 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1526 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1527 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1528 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1530 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1531 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1533 1534 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1535 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1537 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1538 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1539 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1540 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1541 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1542 // Float and double probes don't return value because dtrace doesn't currently support it 1543 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1544 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1545 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1546 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1547 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1548 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1549 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1550 1551 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1552 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1553 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1554 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1555 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1556 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1557 1558 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1559 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1560 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1561 1562 va_list args; 1563 va_start(args, methodID); 1564 JavaValue jvalue(T_VOID); 1565 JNI_ArgumentPusherVaArg ap(methodID, args); 1566 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1567 va_end(args); 1568 JNI_END 1569 1570 1571 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1572 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1573 env, obj, cls, (uintptr_t) methodID); 1574 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1575 1576 JavaValue jvalue(T_VOID); 1577 JNI_ArgumentPusherVaArg ap(methodID, args); 1578 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1579 JNI_END 1580 1581 1582 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1583 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1584 env, obj, cls, (uintptr_t) methodID); 1585 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1586 JavaValue jvalue(T_VOID); 1587 JNI_ArgumentPusherArray ap(methodID, args); 1588 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1589 JNI_END 1590 1591 1592 1593 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1594 , EntryProbe, ResultProbe) \ 1595 \ 1596 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1597 , ResultProbe); \ 1598 \ 1599 JNI_ENTRY(ResultType, \ 1600 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1601 \ 1602 EntryProbe; \ 1603 ResultType ret = 0;\ 1604 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1605 (const ResultType&)ret);\ 1606 \ 1607 va_list args; \ 1608 va_start(args, methodID); \ 1609 JavaValue jvalue(Tag); \ 1610 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1611 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1612 va_end(args); \ 1613 ret = jvalue.get_##ResultType(); \ 1614 return ret;\ 1615 JNI_END 1616 1617 // the runtime type of subword integral basic types is integer 1618 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1619 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1620 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1621 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1622 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1623 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1624 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1625 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1627 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1628 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1629 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1630 1631 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1632 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1634 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1635 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1637 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1638 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1639 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1640 // Float and double probes don't return value because dtrace doesn't currently support it 1641 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1642 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1644 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1645 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1646 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1647 1648 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1649 , EntryProbe, ResultProbe) \ 1650 \ 1651 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1652 , ResultProbe); \ 1653 \ 1654 JNI_ENTRY(ResultType, \ 1655 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1656 \ 1657 EntryProbe; \ 1658 ResultType ret = 0;\ 1659 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1660 (const ResultType&)ret);\ 1661 \ 1662 JavaValue jvalue(Tag); \ 1663 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1664 /* Make sure class is initialized before trying to invoke its method */ \ 1665 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1666 k->initialize(CHECK_0); \ 1667 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1668 va_end(args); \ 1669 ret = jvalue.get_##ResultType(); \ 1670 return ret;\ 1671 JNI_END 1672 1673 // the runtime type of subword integral basic types is integer 1674 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1675 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1676 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1677 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1678 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1680 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1681 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1683 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1684 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1685 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1686 1687 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1688 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1690 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1691 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1692 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1693 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1694 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1695 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1696 // Float and double probes don't return value because dtrace doesn't currently support it 1697 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1698 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1699 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1700 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1701 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1702 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1703 1704 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1705 , EntryProbe, ResultProbe) \ 1706 \ 1707 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1708 , ResultProbe); \ 1709 \ 1710 JNI_ENTRY(ResultType, \ 1711 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1712 \ 1713 EntryProbe; \ 1714 ResultType ret = 0;\ 1715 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1716 (const ResultType&)ret);\ 1717 \ 1718 JavaValue jvalue(Tag); \ 1719 JNI_ArgumentPusherArray ap(methodID, args); \ 1720 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1721 ret = jvalue.get_##ResultType(); \ 1722 return ret;\ 1723 JNI_END 1724 1725 // the runtime type of subword integral basic types is integer 1726 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1727 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1728 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1729 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1730 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1731 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1732 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1733 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1734 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1735 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1736 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1737 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1738 1739 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1740 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1741 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1742 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1743 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1744 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1745 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1746 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1747 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1748 // Float and double probes don't return value because dtrace doesn't currently support it 1749 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1750 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1751 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1752 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1753 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1754 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1755 1756 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1757 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1758 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1759 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1760 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1761 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1762 1763 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1764 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1765 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1766 1767 va_list args; 1768 va_start(args, methodID); 1769 JavaValue jvalue(T_VOID); 1770 JNI_ArgumentPusherVaArg ap(methodID, args); 1771 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1772 va_end(args); 1773 JNI_END 1774 1775 1776 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1777 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1778 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1779 1780 JavaValue jvalue(T_VOID); 1781 JNI_ArgumentPusherVaArg ap(methodID, args); 1782 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1783 JNI_END 1784 1785 1786 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1787 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1788 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1789 1790 JavaValue jvalue(T_VOID); 1791 JNI_ArgumentPusherArray ap(methodID, args); 1792 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1793 JNI_END 1794 1795 1796 // 1797 // Accessing Fields 1798 // 1799 1800 1801 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1802 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1803 1804 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1805 const char *name, const char *sig)) 1806 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1807 jfieldID ret = 0; 1808 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1809 1810 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1811 1812 // The class should have been loaded (we have an instance of the class 1813 // passed in) so the field and signature should already be in the symbol 1814 // table. If they're not there, the field doesn't exist. 1815 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1816 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1817 if (fieldname == nullptr || signame == nullptr) { 1818 ResourceMark rm; 1819 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1820 } 1821 1822 // Make sure class is initialized before handing id's out to fields 1823 k->initialize(CHECK_NULL); 1824 1825 fieldDescriptor fd; 1826 if (!k->is_instance_klass() || 1827 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1828 ResourceMark rm; 1829 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1830 } 1831 1832 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1833 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1834 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat()); 1835 return ret; 1836 JNI_END 1837 1838 1839 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1840 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1841 oop o = JNIHandles::resolve_non_null(obj); 1842 Klass* k = o->klass(); 1843 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1844 oop res = nullptr; 1845 // Keep JVMTI addition small and only check enabled flag here. 1846 // jni_GetField_probe() assumes that is okay to create handles. 1847 if (JvmtiExport::should_post_field_access()) { 1848 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1849 } 1850 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) { 1851 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1852 } else { 1853 assert(k->is_instance_klass(), "Only instance can have flat fields"); 1854 InstanceKlass* ik = InstanceKlass::cast(k); 1855 fieldDescriptor fd; 1856 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck 1857 InstanceKlass* holder = fd.field_holder(); 1858 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1859 res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), CHECK_NULL); 1860 } 1861 jobject ret = JNIHandles::make_local(THREAD, res); 1862 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1863 return ret; 1864 JNI_END 1865 1866 1867 1868 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1869 , EntryProbe, ReturnProbe) \ 1870 \ 1871 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1872 , ReturnProbe); \ 1873 \ 1874 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1875 \ 1876 EntryProbe; \ 1877 Return ret = 0;\ 1878 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1879 \ 1880 oop o = JNIHandles::resolve_non_null(obj); \ 1881 Klass* k = o->klass(); \ 1882 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1883 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1884 if (JvmtiExport::should_post_field_access()) { \ 1885 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \ 1886 } \ 1887 ret = o->Fieldname##_field(offset); \ 1888 return ret; \ 1889 JNI_END 1890 1891 DEFINE_GETFIELD(jboolean, bool, Boolean 1892 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1893 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1894 DEFINE_GETFIELD(jbyte, byte, Byte 1895 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1896 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1897 DEFINE_GETFIELD(jchar, char, Char 1898 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1899 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1900 DEFINE_GETFIELD(jshort, short, Short 1901 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1902 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1903 DEFINE_GETFIELD(jint, int, Int 1904 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1905 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1906 DEFINE_GETFIELD(jlong, long, Long 1907 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1908 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1909 // Float and double probes don't return value because dtrace doesn't currently support it 1910 DEFINE_GETFIELD(jfloat, float, Float 1911 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1912 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1913 DEFINE_GETFIELD(jdouble, double, Double 1914 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1915 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1916 1917 address jni_GetBooleanField_addr() { 1918 return (address)jni_GetBooleanField; 1919 } 1920 address jni_GetByteField_addr() { 1921 return (address)jni_GetByteField; 1922 } 1923 address jni_GetCharField_addr() { 1924 return (address)jni_GetCharField; 1925 } 1926 address jni_GetShortField_addr() { 1927 return (address)jni_GetShortField; 1928 } 1929 address jni_GetIntField_addr() { 1930 return (address)jni_GetIntField; 1931 } 1932 address jni_GetLongField_addr() { 1933 return (address)jni_GetLongField; 1934 } 1935 address jni_GetFloatField_addr() { 1936 return (address)jni_GetFloatField; 1937 } 1938 address jni_GetDoubleField_addr() { 1939 return (address)jni_GetDoubleField; 1940 } 1941 1942 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1943 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 1944 oop o = JNIHandles::resolve_non_null(obj); 1945 Klass* k = o->klass(); 1946 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1947 // Keep JVMTI addition small and only check enabled flag here. 1948 if (JvmtiExport::should_post_field_modification()) { 1949 jvalue field_value; 1950 field_value.l = value; 1951 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 1952 } 1953 if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) { 1954 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 1955 } else { 1956 assert(k->is_instance_klass(), "Only instances can have flat fields"); 1957 InstanceKlass* ik = InstanceKlass::cast(k); 1958 fieldDescriptor fd; 1959 ik->find_field_from_offset(offset, false, &fd); 1960 InstanceKlass* holder = fd.field_holder(); 1961 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1962 oop v = JNIHandles::resolve_non_null(value); 1963 vklass->write_flat_field(o, offset, v, CHECK); 1964 } 1965 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 1966 JNI_END 1967 1968 1969 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 1970 , EntryProbe, ReturnProbe) \ 1971 \ 1972 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 1973 \ 1974 EntryProbe; \ 1975 \ 1976 oop o = JNIHandles::resolve_non_null(obj); \ 1977 Klass* k = o->klass(); \ 1978 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1979 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1980 if (JvmtiExport::should_post_field_modification()) { \ 1981 jvalue field_value; \ 1982 field_value.unionType = value; \ 1983 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 1984 } \ 1985 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 1986 o->Fieldname##_field_put(offset, value); \ 1987 ReturnProbe; \ 1988 JNI_END 1989 1990 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 1991 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1992 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 1993 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 1994 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1995 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 1996 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 1997 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1998 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 1999 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2000 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2001 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2002 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2003 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2004 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2005 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2006 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2007 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2008 // Float and double probes don't return value because dtrace doesn't currently support it 2009 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2010 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2011 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2012 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2013 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2014 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2015 2016 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2017 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2018 2019 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2020 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2021 jobject ret = nullptr; 2022 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2023 2024 fieldDescriptor fd; 2025 bool found = false; 2026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2027 2028 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2029 2030 if (isStatic) { 2031 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2032 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2033 assert(id->is_static_field_id(), "invalid static field id"); 2034 found = id->find_local_field(&fd); 2035 } else { 2036 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2037 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2038 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2039 } 2040 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2041 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2042 ret = JNIHandles::make_local(THREAD, reflected); 2043 return ret; 2044 JNI_END 2045 2046 2047 // 2048 // Accessing Static Fields 2049 // 2050 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2051 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2052 2053 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2054 const char *name, const char *sig)) 2055 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2056 jfieldID ret = nullptr; 2057 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2058 2059 // The class should have been loaded (we have an instance of the class 2060 // passed in) so the field and signature should already be in the symbol 2061 // table. If they're not there, the field doesn't exist. 2062 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2063 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2064 if (fieldname == nullptr || signame == nullptr) { 2065 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2066 } 2067 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2068 // Make sure class is initialized before handing id's out to static fields 2069 k->initialize(CHECK_NULL); 2070 2071 fieldDescriptor fd; 2072 if (!k->is_instance_klass() || 2073 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2074 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2075 } 2076 2077 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2078 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2079 debug_only(id->set_is_static_field_id();) 2080 2081 debug_only(id->verify(fd.field_holder())); 2082 2083 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2084 return ret; 2085 JNI_END 2086 2087 2088 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2089 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2090 #if INCLUDE_JNI_CHECK 2091 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2092 #endif // INCLUDE_JNI_CHECK 2093 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2094 assert(id->is_static_field_id(), "invalid static field id"); 2095 // Keep JVMTI addition small and only check enabled flag here. 2096 // jni_GetField_probe() assumes that is okay to create handles. 2097 if (JvmtiExport::should_post_field_access()) { 2098 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); 2099 } 2100 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2101 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2102 return ret; 2103 JNI_END 2104 2105 2106 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2107 , EntryProbe, ReturnProbe) \ 2108 \ 2109 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2110 , ReturnProbe); \ 2111 \ 2112 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2113 EntryProbe; \ 2114 Return ret = 0;\ 2115 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2116 (const Return&)ret);\ 2117 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2118 assert(id->is_static_field_id(), "invalid static field id"); \ 2119 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2120 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2121 if (JvmtiExport::should_post_field_access()) { \ 2122 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \ 2123 } \ 2124 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2125 return ret;\ 2126 JNI_END 2127 2128 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2129 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2130 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2131 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2132 DEFINE_GETSTATICFIELD(jchar, char, Char 2133 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2134 DEFINE_GETSTATICFIELD(jshort, short, Short 2135 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2136 DEFINE_GETSTATICFIELD(jint, int, Int 2137 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2138 DEFINE_GETSTATICFIELD(jlong, long, Long 2139 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2140 // Float and double probes don't return value because dtrace doesn't currently support it 2141 DEFINE_GETSTATICFIELD(jfloat, float, Float 2142 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2143 DEFINE_GETSTATICFIELD(jdouble, double, Double 2144 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2145 2146 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2147 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2148 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2149 assert(id->is_static_field_id(), "invalid static field id"); 2150 // Keep JVMTI addition small and only check enabled flag here. 2151 // jni_SetField_probe() assumes that is okay to create handles. 2152 if (JvmtiExport::should_post_field_modification()) { 2153 jvalue field_value; 2154 field_value.l = value; 2155 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2156 } 2157 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2158 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2159 JNI_END 2160 2161 2162 2163 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2164 , EntryProbe, ReturnProbe) \ 2165 \ 2166 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2167 EntryProbe; \ 2168 \ 2169 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2170 assert(id->is_static_field_id(), "invalid static field id"); \ 2171 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2172 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2173 if (JvmtiExport::should_post_field_modification()) { \ 2174 jvalue field_value; \ 2175 field_value.unionType = value; \ 2176 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2177 } \ 2178 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 2179 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2180 ReturnProbe;\ 2181 JNI_END 2182 2183 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2184 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2185 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2186 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2187 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2188 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2189 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2190 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2191 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2192 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2193 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2194 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2195 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2196 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2197 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2198 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2199 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2200 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2201 // Float and double probes don't return value because dtrace doesn't currently support it 2202 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2203 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2204 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2205 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2206 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2207 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2208 2209 // 2210 // String Operations 2211 // 2212 2213 // Unicode Interface 2214 2215 DT_RETURN_MARK_DECL(NewString, jstring 2216 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2217 2218 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2219 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2220 jstring ret = nullptr; 2221 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2222 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2223 ret = (jstring) JNIHandles::make_local(THREAD, string); 2224 return ret; 2225 JNI_END 2226 2227 2228 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2229 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2230 jsize ret = 0; 2231 oop s = JNIHandles::resolve_non_null(string); 2232 ret = java_lang_String::length(s); 2233 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2234 return ret; 2235 JNI_END 2236 2237 2238 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2239 JNIEnv *env, jstring string, jboolean *isCopy)) 2240 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2241 jchar* buf = nullptr; 2242 oop s = JNIHandles::resolve_non_null(string); 2243 typeArrayOop s_value = java_lang_String::value(s); 2244 if (s_value != nullptr) { 2245 int s_len = java_lang_String::length(s, s_value); 2246 bool is_latin1 = java_lang_String::is_latin1(s); 2247 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2248 /* JNI Specification states return null on OOM */ 2249 if (buf != nullptr) { 2250 if (s_len > 0) { 2251 if (!is_latin1) { 2252 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2253 buf, s_len); 2254 } else { 2255 for (int i = 0; i < s_len; i++) { 2256 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2257 } 2258 } 2259 } 2260 buf[s_len] = 0; 2261 //%note jni_5 2262 if (isCopy != nullptr) { 2263 *isCopy = JNI_TRUE; 2264 } 2265 } 2266 } 2267 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2268 return buf; 2269 JNI_END 2270 2271 2272 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2273 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2274 //%note jni_6 2275 if (chars != nullptr) { 2276 // Since String objects are supposed to be immutable, don't copy any 2277 // new data back. A bad user will have to go after the char array. 2278 FreeHeap((void*) chars); 2279 } 2280 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2281 JNI_END 2282 2283 2284 // UTF Interface 2285 2286 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2287 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2288 2289 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2290 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2291 jstring ret; 2292 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2293 2294 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2295 ret = (jstring) JNIHandles::make_local(THREAD, result); 2296 return ret; 2297 JNI_END 2298 2299 2300 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2301 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2302 oop java_string = JNIHandles::resolve_non_null(string); 2303 jsize ret = java_lang_String::utf8_length(java_string); 2304 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2305 return ret; 2306 JNI_END 2307 2308 2309 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2310 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2311 char* result = nullptr; 2312 oop java_string = JNIHandles::resolve_non_null(string); 2313 typeArrayOop s_value = java_lang_String::value(java_string); 2314 if (s_value != nullptr) { 2315 size_t length = java_lang_String::utf8_length(java_string, s_value); 2316 /* JNI Specification states return null on OOM */ 2317 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL); 2318 if (result != nullptr) { 2319 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2320 if (isCopy != nullptr) { 2321 *isCopy = JNI_TRUE; 2322 } 2323 } 2324 } 2325 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2326 return result; 2327 JNI_END 2328 2329 2330 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2331 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2332 if (chars != nullptr) { 2333 FreeHeap((char*) chars); 2334 } 2335 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2336 JNI_END 2337 2338 2339 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2340 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2341 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2342 assert(a->is_array(), "must be array"); 2343 jsize ret = a->length(); 2344 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2345 return ret; 2346 JNI_END 2347 2348 2349 // 2350 // Object Array Operations 2351 // 2352 2353 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2354 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2355 2356 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2357 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2358 jobjectArray ret = nullptr; 2359 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2360 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2361 Klass* ak = ek->array_klass(CHECK_NULL); 2362 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2363 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2364 oop initial_value = JNIHandles::resolve(initialElement); 2365 if (initial_value != nullptr) { // array already initialized with null 2366 for (int index = 0; index < length; index++) { 2367 result->obj_at_put(index, initial_value); 2368 } 2369 } 2370 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2371 return ret; 2372 JNI_END 2373 2374 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2375 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2376 2377 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2378 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2379 jobject ret = nullptr; 2380 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2381 oop res = nullptr; 2382 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2383 if (arr->is_within_bounds(index)) { 2384 if (arr->is_flatArray()) { 2385 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2386 flatArrayHandle vah(thread, a); 2387 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL); 2388 assert(res != nullptr, "Must be set in one of two paths above"); 2389 } else { 2390 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2391 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2392 res = a->obj_at(index); 2393 } 2394 } else { 2395 ResourceMark rm(THREAD); 2396 stringStream ss; 2397 ss.print("Index %d out of bounds for length %d", index,arr->length()); 2398 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2399 } 2400 ret = JNIHandles::make_local(THREAD, res); 2401 return ret; 2402 JNI_END 2403 2404 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2405 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2406 2407 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2408 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2409 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2410 2411 bool oob = false; 2412 int length = -1; 2413 oop res = nullptr; 2414 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2415 if (arr->is_within_bounds(index)) { 2416 if (arr->is_flatArray()) { 2417 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2418 oop v = JNIHandles::resolve(value); 2419 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass()); 2420 InlineKlass* element_vklass = vaklass->element_klass(); 2421 if (v != nullptr && v->is_a(element_vklass)) { 2422 a->value_copy_to_index(v, index); 2423 } else { 2424 ResourceMark rm(THREAD); 2425 stringStream ss; 2426 Klass *kl = FlatArrayKlass::cast(a->klass()); 2427 ss.print("type mismatch: can not store %s to %s[%d]", 2428 v->klass()->external_name(), 2429 kl->external_name(), 2430 index); 2431 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2432 ss.print("[]"); 2433 } 2434 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2435 } 2436 } else { 2437 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2438 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2439 oop v = JNIHandles::resolve(value); 2440 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2441 a->obj_at_put(index, v); 2442 } else { 2443 ResourceMark rm(THREAD); 2444 stringStream ss; 2445 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2446 ss.print("type mismatch: can not store %s to %s[%d]", 2447 v->klass()->external_name(), 2448 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2449 index); 2450 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2451 ss.print("[]"); 2452 } 2453 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2454 } 2455 } 2456 } else { 2457 ResourceMark rm(THREAD); 2458 stringStream ss; 2459 ss.print("Index %d out of bounds for length %d", index, arr->length()); 2460 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2461 } 2462 JNI_END 2463 2464 2465 2466 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2467 ,EntryProbe,ReturnProbe) \ 2468 \ 2469 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2470 , ReturnProbe); \ 2471 \ 2472 JNI_ENTRY(Return, \ 2473 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2474 EntryProbe; \ 2475 Return ret = nullptr;\ 2476 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2477 \ 2478 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2479 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2480 return ret;\ 2481 JNI_END 2482 2483 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2484 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2485 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2486 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2487 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2488 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2489 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2490 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2491 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2492 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2493 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2494 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2495 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2496 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2497 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2498 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2499 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2500 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2501 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2502 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2503 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2504 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2505 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2506 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2507 2508 // Return an address which will fault if the caller writes to it. 2509 2510 static char* get_bad_address() { 2511 static char* bad_address = nullptr; 2512 if (bad_address == nullptr) { 2513 size_t size = os::vm_allocation_granularity(); 2514 bad_address = os::reserve_memory(size); 2515 if (bad_address != nullptr) { 2516 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2517 /*is_committed*/false); 2518 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2519 } 2520 } 2521 return bad_address; 2522 } 2523 2524 2525 2526 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2527 , EntryProbe, ReturnProbe) \ 2528 \ 2529 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2530 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2531 EntryProbe; \ 2532 /* allocate an chunk of memory in c land */ \ 2533 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2534 ElementType* result; \ 2535 int len = a->length(); \ 2536 if (len == 0) { \ 2537 if (isCopy != nullptr) { \ 2538 *isCopy = JNI_FALSE; \ 2539 } \ 2540 /* Empty array: legal but useless, can't return null. \ 2541 * Return a pointer to something useless. \ 2542 * Avoid asserts in typeArrayOop. */ \ 2543 result = (ElementType*)get_bad_address(); \ 2544 } else { \ 2545 /* JNI Specification states return null on OOM */ \ 2546 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2547 if (result != nullptr) { \ 2548 /* copy the array to the c chunk */ \ 2549 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2550 result, len); \ 2551 if (isCopy) { \ 2552 *isCopy = JNI_TRUE; \ 2553 } \ 2554 } \ 2555 } \ 2556 ReturnProbe; \ 2557 return result; \ 2558 JNI_END 2559 2560 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2561 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2562 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2563 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2564 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2565 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2566 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2567 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2568 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2569 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2570 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2571 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2572 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2573 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2574 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2575 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2576 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2577 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2578 // Float and double probes don't return value because dtrace doesn't currently support it 2579 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2580 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2581 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2582 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2583 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2584 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2585 2586 2587 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2588 , EntryProbe, ReturnProbe);\ 2589 \ 2590 JNI_ENTRY_NO_PRESERVE(void, \ 2591 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2592 ElementType *buf, jint mode)) \ 2593 EntryProbe; \ 2594 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2595 int len = a->length(); \ 2596 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2597 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2598 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2599 } \ 2600 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2601 FreeHeap(buf); \ 2602 } \ 2603 } \ 2604 ReturnProbe; \ 2605 JNI_END 2606 2607 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2608 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2609 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2610 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2611 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2612 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2613 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2614 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2615 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2616 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2617 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2618 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2619 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2620 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2621 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2622 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2623 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2624 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2625 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2626 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2627 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2628 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2629 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2630 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2631 2632 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2633 ResourceMark rm(THREAD); 2634 if (copy_len < 0) { 2635 stringStream ss; 2636 ss.print("Length %d is negative", copy_len); 2637 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2638 } else if (start < 0 || (start > array_len - copy_len)) { 2639 stringStream ss; 2640 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2641 start, (int64_t)start+(int64_t)copy_len, array_len); 2642 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2643 } 2644 } 2645 2646 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2647 , EntryProbe, ReturnProbe); \ 2648 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2649 , ReturnProbe); \ 2650 \ 2651 JNI_ENTRY(void, \ 2652 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2653 jsize len, ElementType *buf)) \ 2654 EntryProbe; \ 2655 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2656 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2657 check_bounds(start, len, src->length(), CHECK); \ 2658 if (len > 0) { \ 2659 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2660 } \ 2661 JNI_END 2662 2663 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2664 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2665 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2666 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2667 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2668 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2669 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2670 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2671 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2672 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2673 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2674 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2675 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2676 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2677 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2678 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2679 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2680 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2681 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2682 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2683 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2684 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2685 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2686 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2687 2688 2689 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2690 , EntryProbe, ReturnProbe); \ 2691 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2692 ,ReturnProbe); \ 2693 \ 2694 JNI_ENTRY(void, \ 2695 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2696 jsize len, const ElementType *buf)) \ 2697 EntryProbe; \ 2698 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2699 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2700 check_bounds(start, len, dst->length(), CHECK); \ 2701 if (len > 0) { \ 2702 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2703 } \ 2704 JNI_END 2705 2706 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2707 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2708 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2709 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2710 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2711 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2712 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2713 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2714 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2715 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2716 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2717 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2718 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2719 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2720 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2721 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2722 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2723 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2724 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2725 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2726 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2727 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2728 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2729 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2730 2731 2732 DT_RETURN_MARK_DECL(RegisterNatives, jint 2733 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2734 2735 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2736 const JNINativeMethod *methods, 2737 jint nMethods)) 2738 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2739 jint ret = 0; 2740 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2741 2742 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2743 2744 // There are no restrictions on native code registering native methods, 2745 // which allows agents to redefine the bindings to native methods, however 2746 // we issue a warning if any code running outside of the boot/platform 2747 // loader is rebinding any native methods in classes loaded by the 2748 // boot/platform loader that are in named modules. That will catch changes 2749 // to platform classes while excluding classes added to the bootclasspath. 2750 bool do_warning = false; 2751 2752 // Only instanceKlasses can have native methods 2753 if (k->is_instance_klass()) { 2754 oop cl = k->class_loader(); 2755 InstanceKlass* ik = InstanceKlass::cast(k); 2756 // Check for a platform class 2757 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) && 2758 ik->module()->is_named()) { 2759 Klass* caller = thread->security_get_caller_class(1); 2760 // If no caller class, or caller class has a different loader, then 2761 // issue a warning below. 2762 do_warning = (caller == nullptr) || caller->class_loader() != cl; 2763 } 2764 } 2765 2766 2767 for (int index = 0; index < nMethods; index++) { 2768 const char* meth_name = methods[index].name; 2769 const char* meth_sig = methods[index].signature; 2770 int meth_name_len = (int)strlen(meth_name); 2771 2772 // The class should have been loaded (we have an instance of the class 2773 // passed in) so the method and signature should already be in the symbol 2774 // table. If they're not there, the method doesn't exist. 2775 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2776 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2777 2778 if (name == nullptr || signature == nullptr) { 2779 ResourceMark rm(THREAD); 2780 stringStream st; 2781 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2782 // Must return negative value on failure 2783 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2784 } 2785 2786 if (do_warning) { 2787 ResourceMark rm(THREAD); 2788 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2789 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2790 } 2791 2792 bool res = Method::register_native(k, name, signature, 2793 (address) methods[index].fnPtr, THREAD); 2794 if (!res) { 2795 ret = -1; 2796 break; 2797 } 2798 } 2799 return ret; 2800 JNI_END 2801 2802 2803 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2804 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2805 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2806 //%note jni_2 2807 if (k->is_instance_klass()) { 2808 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2809 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2810 if (m->is_native()) { 2811 m->clear_native_function(); 2812 m->set_signature_handler(nullptr); 2813 } 2814 } 2815 } 2816 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2817 return 0; 2818 JNI_END 2819 2820 // 2821 // Monitor functions 2822 // 2823 2824 DT_RETURN_MARK_DECL(MonitorEnter, jint 2825 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2826 2827 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2828 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2829 jint ret = JNI_ERR; 2830 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2831 2832 // If the object is null, we can't do anything with it 2833 if (jobj == nullptr) { 2834 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2835 } 2836 2837 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2838 ObjectSynchronizer::jni_enter(obj, thread); 2839 return JNI_OK; 2840 JNI_END 2841 2842 DT_RETURN_MARK_DECL(MonitorExit, jint 2843 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2844 2845 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2846 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2847 jint ret = JNI_ERR; 2848 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2849 2850 // Don't do anything with a null object 2851 if (jobj == nullptr) { 2852 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2853 } 2854 2855 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2856 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2857 return JNI_OK; 2858 JNI_END 2859 2860 // 2861 // Extensions 2862 // 2863 2864 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2865 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2866 2867 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2868 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2869 DT_VOID_RETURN_MARK(GetStringRegion); 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 if (len > 0) { 2877 bool is_latin1 = java_lang_String::is_latin1(s); 2878 if (!is_latin1) { 2879 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2880 buf, len); 2881 } else { 2882 for (int i = 0; i < len; i++) { 2883 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2884 } 2885 } 2886 } 2887 } 2888 JNI_END 2889 2890 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2891 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2892 2893 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2894 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2895 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2896 oop s = JNIHandles::resolve_non_null(string); 2897 typeArrayOop s_value = java_lang_String::value(s); 2898 int s_len = java_lang_String::length(s, s_value); 2899 if (start < 0 || len < 0 || start > s_len - len) { 2900 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2901 } else { 2902 //%note jni_7 2903 if (len > 0) { 2904 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2905 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2906 // as_utf8_string null-terminates the result string 2907 } else { 2908 // JDK null-terminates the buffer even in len is zero 2909 if (buf != nullptr) { 2910 buf[0] = 0; 2911 } 2912 } 2913 } 2914 JNI_END 2915 2916 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2917 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2918 Handle a(thread, JNIHandles::resolve_non_null(array)); 2919 assert(a->is_typeArray(), "just checking"); 2920 2921 // Pin object 2922 Universe::heap()->pin_object(thread, a()); 2923 2924 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 2925 void* ret = arrayOop(a())->base(type); 2926 if (isCopy != nullptr) { 2927 *isCopy = JNI_FALSE; 2928 } 2929 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2930 return ret; 2931 JNI_END 2932 2933 2934 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2935 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 2936 // Unpin object 2937 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array)); 2938 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 2939 JNI_END 2940 2941 2942 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 2943 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 2944 oop s = JNIHandles::resolve_non_null(string); 2945 jchar* ret; 2946 if (!java_lang_String::is_latin1(s)) { 2947 typeArrayHandle s_value(thread, java_lang_String::value(s)); 2948 2949 // Pin value array 2950 Universe::heap()->pin_object(thread, s_value()); 2951 2952 ret = (jchar*) s_value->base(T_CHAR); 2953 if (isCopy != nullptr) *isCopy = JNI_FALSE; 2954 } else { 2955 // Inflate latin1 encoded string to UTF16 2956 typeArrayOop s_value = java_lang_String::value(s); 2957 int s_len = java_lang_String::length(s, s_value); 2958 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2959 /* JNI Specification states return null on OOM */ 2960 if (ret != nullptr) { 2961 for (int i = 0; i < s_len; i++) { 2962 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2963 } 2964 ret[s_len] = 0; 2965 } 2966 if (isCopy != nullptr) *isCopy = JNI_TRUE; 2967 } 2968 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 2969 return ret; 2970 JNI_END 2971 2972 2973 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 2974 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 2975 oop s = JNIHandles::resolve_non_null(str); 2976 bool is_latin1 = java_lang_String::is_latin1(s); 2977 2978 if (is_latin1) { 2979 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 2980 // This assumes that ReleaseStringCritical bookends GetStringCritical. 2981 FREE_C_HEAP_ARRAY(jchar, chars); 2982 } else { 2983 // StringDedup can have replaced the value array, so don't fetch the array from 's'. 2984 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical. 2985 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR)); 2986 2987 // Unpin value array 2988 Universe::heap()->unpin_object(thread, value); 2989 } 2990 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 2991 JNI_END 2992 2993 2994 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 2995 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 2996 Handle ref_handle(thread, JNIHandles::resolve(ref)); 2997 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 2998 if (ret == nullptr) { 2999 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr); 3000 } 3001 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3002 return ret; 3003 JNI_END 3004 3005 // Must be JNI_ENTRY (with HandleMark) 3006 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3007 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3008 JNIHandles::destroy_weak_global(ref); 3009 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3010 JNI_END 3011 3012 3013 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3014 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3015 jni_check_async_exceptions(thread); 3016 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3017 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3018 return ret; 3019 JNI_END 3020 3021 3022 // Initialization state for three routines below relating to 3023 // java.nio.DirectBuffers 3024 static int directBufferSupportInitializeStarted = 0; 3025 static volatile int directBufferSupportInitializeEnded = 0; 3026 static volatile int directBufferSupportInitializeFailed = 0; 3027 static jclass bufferClass = nullptr; 3028 static jclass directBufferClass = nullptr; 3029 static jclass directByteBufferClass = nullptr; 3030 static jmethodID directByteBufferConstructor = nullptr; 3031 static jfieldID directBufferAddressField = nullptr; 3032 static jfieldID bufferCapacityField = nullptr; 3033 3034 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3035 Handle loader; // null (bootstrap) loader 3036 Handle protection_domain; // null protection domain 3037 3038 TempNewSymbol sym = SymbolTable::new_symbol(name); 3039 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3040 3041 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 3042 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3043 } 3044 return result; 3045 } 3046 3047 // These lookups are done with the null (bootstrap) ClassLoader to 3048 // circumvent any security checks that would be done by jni_FindClass. 3049 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3050 { 3051 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; } 3052 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; } 3053 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; } 3054 return true; 3055 } 3056 JNI_END 3057 3058 3059 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3060 if (directBufferSupportInitializeFailed) { 3061 return false; 3062 } 3063 3064 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 3065 if (!lookupDirectBufferClasses(env)) { 3066 directBufferSupportInitializeFailed = 1; 3067 return false; 3068 } 3069 3070 // Make global references for these 3071 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3072 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3073 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3074 3075 // Global refs will be null if out-of-memory (no exception is pending) 3076 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) { 3077 directBufferSupportInitializeFailed = 1; 3078 return false; 3079 } 3080 3081 // Get needed field and method IDs 3082 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V"); 3083 if (env->ExceptionCheck()) { 3084 env->ExceptionClear(); 3085 directBufferSupportInitializeFailed = 1; 3086 return false; 3087 } 3088 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3089 if (env->ExceptionCheck()) { 3090 env->ExceptionClear(); 3091 directBufferSupportInitializeFailed = 1; 3092 return false; 3093 } 3094 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3095 if (env->ExceptionCheck()) { 3096 env->ExceptionClear(); 3097 directBufferSupportInitializeFailed = 1; 3098 return false; 3099 } 3100 3101 if ((directByteBufferConstructor == nullptr) || 3102 (directBufferAddressField == nullptr) || 3103 (bufferCapacityField == nullptr)) { 3104 directBufferSupportInitializeFailed = 1; 3105 return false; 3106 } 3107 3108 directBufferSupportInitializeEnded = 1; 3109 } else { 3110 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3111 os::naked_yield(); 3112 } 3113 } 3114 3115 return !directBufferSupportInitializeFailed; 3116 } 3117 3118 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3119 { 3120 // thread_from_jni_environment() will block if VM is gone. 3121 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3122 3123 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3124 3125 if (!directBufferSupportInitializeEnded) { 3126 if (!initializeDirectBufferSupport(env, thread)) { 3127 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr); 3128 return nullptr; 3129 } 3130 } 3131 3132 // Being paranoid about accidental sign extension on address 3133 jlong addr = (jlong) ((uintptr_t) address); 3134 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity); 3135 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3136 return ret; 3137 } 3138 3139 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3140 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3141 3142 extern "C" void* JNICALL jni_GetDirectBufferAddress(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_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3148 void* ret = nullptr; 3149 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3150 3151 if (!directBufferSupportInitializeEnded) { 3152 if (!initializeDirectBufferSupport(env, thread)) { 3153 return 0; 3154 } 3155 } 3156 3157 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) { 3158 return 0; 3159 } 3160 3161 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3162 return ret; 3163 } 3164 3165 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3166 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3167 3168 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3169 { 3170 // thread_from_jni_environment() will block if VM is gone. 3171 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3172 3173 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3174 jlong ret = -1; 3175 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3176 3177 if (!directBufferSupportInitializeEnded) { 3178 if (!initializeDirectBufferSupport(env, thread)) { 3179 ret = 0; 3180 return ret; 3181 } 3182 } 3183 3184 if (buf == nullptr) { 3185 return -1; 3186 } 3187 3188 if (!env->IsInstanceOf(buf, directBufferClass)) { 3189 return -1; 3190 } 3191 3192 // NOTE that capacity is currently an int in the implementation 3193 ret = env->GetIntField(buf, bufferCapacityField); 3194 return ret; 3195 } 3196 3197 3198 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3199 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3200 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3201 return CurrentVersion; 3202 JNI_END 3203 3204 extern struct JavaVM_ main_vm; 3205 3206 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3207 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3208 *vm = (JavaVM *)(&main_vm); 3209 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3210 return JNI_OK; 3211 JNI_END 3212 3213 3214 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3215 return Modules::get_module(clazz, THREAD); 3216 JNI_END 3217 3218 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj)) 3219 oop thread_obj = JNIHandles::resolve_external_guard(obj); 3220 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) { 3221 return JNI_TRUE; 3222 } else { 3223 return JNI_FALSE; 3224 } 3225 JNI_END 3226 3227 3228 // Structure containing all jni functions 3229 struct JNINativeInterface_ jni_NativeInterface = { 3230 nullptr, 3231 nullptr, 3232 nullptr, 3233 3234 nullptr, 3235 3236 jni_GetVersion, 3237 3238 jni_DefineClass, 3239 jni_FindClass, 3240 3241 jni_FromReflectedMethod, 3242 jni_FromReflectedField, 3243 3244 jni_ToReflectedMethod, 3245 3246 jni_GetSuperclass, 3247 jni_IsAssignableFrom, 3248 3249 jni_ToReflectedField, 3250 3251 jni_Throw, 3252 jni_ThrowNew, 3253 jni_ExceptionOccurred, 3254 jni_ExceptionDescribe, 3255 jni_ExceptionClear, 3256 jni_FatalError, 3257 3258 jni_PushLocalFrame, 3259 jni_PopLocalFrame, 3260 3261 jni_NewGlobalRef, 3262 jni_DeleteGlobalRef, 3263 jni_DeleteLocalRef, 3264 jni_IsSameObject, 3265 3266 jni_NewLocalRef, 3267 jni_EnsureLocalCapacity, 3268 3269 jni_AllocObject, 3270 jni_NewObject, 3271 jni_NewObjectV, 3272 jni_NewObjectA, 3273 3274 jni_GetObjectClass, 3275 jni_IsInstanceOf, 3276 3277 jni_GetMethodID, 3278 3279 jni_CallObjectMethod, 3280 jni_CallObjectMethodV, 3281 jni_CallObjectMethodA, 3282 jni_CallBooleanMethod, 3283 jni_CallBooleanMethodV, 3284 jni_CallBooleanMethodA, 3285 jni_CallByteMethod, 3286 jni_CallByteMethodV, 3287 jni_CallByteMethodA, 3288 jni_CallCharMethod, 3289 jni_CallCharMethodV, 3290 jni_CallCharMethodA, 3291 jni_CallShortMethod, 3292 jni_CallShortMethodV, 3293 jni_CallShortMethodA, 3294 jni_CallIntMethod, 3295 jni_CallIntMethodV, 3296 jni_CallIntMethodA, 3297 jni_CallLongMethod, 3298 jni_CallLongMethodV, 3299 jni_CallLongMethodA, 3300 jni_CallFloatMethod, 3301 jni_CallFloatMethodV, 3302 jni_CallFloatMethodA, 3303 jni_CallDoubleMethod, 3304 jni_CallDoubleMethodV, 3305 jni_CallDoubleMethodA, 3306 jni_CallVoidMethod, 3307 jni_CallVoidMethodV, 3308 jni_CallVoidMethodA, 3309 3310 jni_CallNonvirtualObjectMethod, 3311 jni_CallNonvirtualObjectMethodV, 3312 jni_CallNonvirtualObjectMethodA, 3313 jni_CallNonvirtualBooleanMethod, 3314 jni_CallNonvirtualBooleanMethodV, 3315 jni_CallNonvirtualBooleanMethodA, 3316 jni_CallNonvirtualByteMethod, 3317 jni_CallNonvirtualByteMethodV, 3318 jni_CallNonvirtualByteMethodA, 3319 jni_CallNonvirtualCharMethod, 3320 jni_CallNonvirtualCharMethodV, 3321 jni_CallNonvirtualCharMethodA, 3322 jni_CallNonvirtualShortMethod, 3323 jni_CallNonvirtualShortMethodV, 3324 jni_CallNonvirtualShortMethodA, 3325 jni_CallNonvirtualIntMethod, 3326 jni_CallNonvirtualIntMethodV, 3327 jni_CallNonvirtualIntMethodA, 3328 jni_CallNonvirtualLongMethod, 3329 jni_CallNonvirtualLongMethodV, 3330 jni_CallNonvirtualLongMethodA, 3331 jni_CallNonvirtualFloatMethod, 3332 jni_CallNonvirtualFloatMethodV, 3333 jni_CallNonvirtualFloatMethodA, 3334 jni_CallNonvirtualDoubleMethod, 3335 jni_CallNonvirtualDoubleMethodV, 3336 jni_CallNonvirtualDoubleMethodA, 3337 jni_CallNonvirtualVoidMethod, 3338 jni_CallNonvirtualVoidMethodV, 3339 jni_CallNonvirtualVoidMethodA, 3340 3341 jni_GetFieldID, 3342 3343 jni_GetObjectField, 3344 jni_GetBooleanField, 3345 jni_GetByteField, 3346 jni_GetCharField, 3347 jni_GetShortField, 3348 jni_GetIntField, 3349 jni_GetLongField, 3350 jni_GetFloatField, 3351 jni_GetDoubleField, 3352 3353 jni_SetObjectField, 3354 jni_SetBooleanField, 3355 jni_SetByteField, 3356 jni_SetCharField, 3357 jni_SetShortField, 3358 jni_SetIntField, 3359 jni_SetLongField, 3360 jni_SetFloatField, 3361 jni_SetDoubleField, 3362 3363 jni_GetStaticMethodID, 3364 3365 jni_CallStaticObjectMethod, 3366 jni_CallStaticObjectMethodV, 3367 jni_CallStaticObjectMethodA, 3368 jni_CallStaticBooleanMethod, 3369 jni_CallStaticBooleanMethodV, 3370 jni_CallStaticBooleanMethodA, 3371 jni_CallStaticByteMethod, 3372 jni_CallStaticByteMethodV, 3373 jni_CallStaticByteMethodA, 3374 jni_CallStaticCharMethod, 3375 jni_CallStaticCharMethodV, 3376 jni_CallStaticCharMethodA, 3377 jni_CallStaticShortMethod, 3378 jni_CallStaticShortMethodV, 3379 jni_CallStaticShortMethodA, 3380 jni_CallStaticIntMethod, 3381 jni_CallStaticIntMethodV, 3382 jni_CallStaticIntMethodA, 3383 jni_CallStaticLongMethod, 3384 jni_CallStaticLongMethodV, 3385 jni_CallStaticLongMethodA, 3386 jni_CallStaticFloatMethod, 3387 jni_CallStaticFloatMethodV, 3388 jni_CallStaticFloatMethodA, 3389 jni_CallStaticDoubleMethod, 3390 jni_CallStaticDoubleMethodV, 3391 jni_CallStaticDoubleMethodA, 3392 jni_CallStaticVoidMethod, 3393 jni_CallStaticVoidMethodV, 3394 jni_CallStaticVoidMethodA, 3395 3396 jni_GetStaticFieldID, 3397 3398 jni_GetStaticObjectField, 3399 jni_GetStaticBooleanField, 3400 jni_GetStaticByteField, 3401 jni_GetStaticCharField, 3402 jni_GetStaticShortField, 3403 jni_GetStaticIntField, 3404 jni_GetStaticLongField, 3405 jni_GetStaticFloatField, 3406 jni_GetStaticDoubleField, 3407 3408 jni_SetStaticObjectField, 3409 jni_SetStaticBooleanField, 3410 jni_SetStaticByteField, 3411 jni_SetStaticCharField, 3412 jni_SetStaticShortField, 3413 jni_SetStaticIntField, 3414 jni_SetStaticLongField, 3415 jni_SetStaticFloatField, 3416 jni_SetStaticDoubleField, 3417 3418 jni_NewString, 3419 jni_GetStringLength, 3420 jni_GetStringChars, 3421 jni_ReleaseStringChars, 3422 3423 jni_NewStringUTF, 3424 jni_GetStringUTFLength, 3425 jni_GetStringUTFChars, 3426 jni_ReleaseStringUTFChars, 3427 3428 jni_GetArrayLength, 3429 3430 jni_NewObjectArray, 3431 jni_GetObjectArrayElement, 3432 jni_SetObjectArrayElement, 3433 3434 jni_NewBooleanArray, 3435 jni_NewByteArray, 3436 jni_NewCharArray, 3437 jni_NewShortArray, 3438 jni_NewIntArray, 3439 jni_NewLongArray, 3440 jni_NewFloatArray, 3441 jni_NewDoubleArray, 3442 3443 jni_GetBooleanArrayElements, 3444 jni_GetByteArrayElements, 3445 jni_GetCharArrayElements, 3446 jni_GetShortArrayElements, 3447 jni_GetIntArrayElements, 3448 jni_GetLongArrayElements, 3449 jni_GetFloatArrayElements, 3450 jni_GetDoubleArrayElements, 3451 3452 jni_ReleaseBooleanArrayElements, 3453 jni_ReleaseByteArrayElements, 3454 jni_ReleaseCharArrayElements, 3455 jni_ReleaseShortArrayElements, 3456 jni_ReleaseIntArrayElements, 3457 jni_ReleaseLongArrayElements, 3458 jni_ReleaseFloatArrayElements, 3459 jni_ReleaseDoubleArrayElements, 3460 3461 jni_GetBooleanArrayRegion, 3462 jni_GetByteArrayRegion, 3463 jni_GetCharArrayRegion, 3464 jni_GetShortArrayRegion, 3465 jni_GetIntArrayRegion, 3466 jni_GetLongArrayRegion, 3467 jni_GetFloatArrayRegion, 3468 jni_GetDoubleArrayRegion, 3469 3470 jni_SetBooleanArrayRegion, 3471 jni_SetByteArrayRegion, 3472 jni_SetCharArrayRegion, 3473 jni_SetShortArrayRegion, 3474 jni_SetIntArrayRegion, 3475 jni_SetLongArrayRegion, 3476 jni_SetFloatArrayRegion, 3477 jni_SetDoubleArrayRegion, 3478 3479 jni_RegisterNatives, 3480 jni_UnregisterNatives, 3481 3482 jni_MonitorEnter, 3483 jni_MonitorExit, 3484 3485 jni_GetJavaVM, 3486 3487 jni_GetStringRegion, 3488 jni_GetStringUTFRegion, 3489 3490 jni_GetPrimitiveArrayCritical, 3491 jni_ReleasePrimitiveArrayCritical, 3492 3493 jni_GetStringCritical, 3494 jni_ReleaseStringCritical, 3495 3496 jni_NewWeakGlobalRef, 3497 jni_DeleteWeakGlobalRef, 3498 3499 jni_ExceptionCheck, 3500 3501 jni_NewDirectByteBuffer, 3502 jni_GetDirectBufferAddress, 3503 jni_GetDirectBufferCapacity, 3504 3505 // New 1_6 features 3506 3507 jni_GetObjectRefType, 3508 3509 // Module features 3510 3511 jni_GetModule, 3512 3513 // Virtual threads 3514 3515 jni_IsVirtualThread 3516 }; 3517 3518 3519 // For jvmti use to modify jni function table. 3520 // Java threads in native contiues to run until it is transitioned 3521 // to VM at safepoint. Before the transition or before it is blocked 3522 // for safepoint it may access jni function table. VM could crash if 3523 // any java thread access the jni function table in the middle of memcpy. 3524 // To avoid this each function pointers are copied automically. 3525 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3526 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3527 intptr_t *a = (intptr_t *) jni_functions(); 3528 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3529 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3530 Atomic::store(a++, *b++); 3531 } 3532 } 3533 3534 void quicken_jni_functions() { 3535 // Replace Get<Primitive>Field with fast versions 3536 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) { 3537 address func; 3538 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3539 if (func != (address)-1) { 3540 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3541 } 3542 func = JNI_FastGetField::generate_fast_get_byte_field(); 3543 if (func != (address)-1) { 3544 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3545 } 3546 func = JNI_FastGetField::generate_fast_get_char_field(); 3547 if (func != (address)-1) { 3548 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3549 } 3550 func = JNI_FastGetField::generate_fast_get_short_field(); 3551 if (func != (address)-1) { 3552 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3553 } 3554 func = JNI_FastGetField::generate_fast_get_int_field(); 3555 if (func != (address)-1) { 3556 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3557 } 3558 func = JNI_FastGetField::generate_fast_get_long_field(); 3559 if (func != (address)-1) { 3560 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3561 } 3562 func = JNI_FastGetField::generate_fast_get_float_field(); 3563 if (func != (address)-1) { 3564 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3565 } 3566 func = JNI_FastGetField::generate_fast_get_double_field(); 3567 if (func != (address)-1) { 3568 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3569 } 3570 } 3571 } 3572 3573 // Returns the function structure 3574 struct JNINativeInterface_* jni_functions() { 3575 #if INCLUDE_JNI_CHECK 3576 if (CheckJNICalls) return jni_functions_check(); 3577 #endif // INCLUDE_JNI_CHECK 3578 return &jni_NativeInterface; 3579 } 3580 3581 // Returns the function structure 3582 struct JNINativeInterface_* jni_functions_nocheck() { 3583 return &jni_NativeInterface; 3584 } 3585 3586 3587 // Invocation API 3588 3589 3590 // Forward declaration 3591 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3592 3593 // Global invocation API vars 3594 enum VM_Creation_State { 3595 NOT_CREATED = 0, 3596 IN_PROGRESS, // Most JNI operations are permitted during this phase to 3597 // allow for initialization actions by libraries and agents. 3598 COMPLETE 3599 }; 3600 3601 volatile VM_Creation_State vm_created = NOT_CREATED; 3602 3603 // Indicate whether it is safe to recreate VM. Recreation is only 3604 // possible after a failed initial creation attempt in some cases. 3605 volatile int safe_to_recreate_vm = 1; 3606 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3607 3608 3609 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3610 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3611 3612 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3613 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3614 3615 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3616 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3617 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3618 jint ret = JNI_ERR; 3619 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3620 3621 if (Threads::is_supported_jni_version(args->version)) { 3622 ret = JNI_OK; 3623 } 3624 // 1.1 style no longer supported in hotspot. 3625 // According the JNI spec, we should update args->version on return. 3626 // We also use the structure to communicate with launcher about default 3627 // stack size. 3628 if (args->version == JNI_VERSION_1_1) { 3629 args->version = JNI_VERSION_1_2; 3630 // javaStackSize is int in arguments structure 3631 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3632 args->javaStackSize = (jint)(ThreadStackSize * K); 3633 } 3634 return ret; 3635 } 3636 3637 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3638 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3639 3640 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3641 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3642 3643 jint result = JNI_ERR; 3644 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3645 3646 // We're about to use Atomic::xchg for synchronization. Some Zero 3647 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3648 // but __sync_lock_test_and_set is not guaranteed to do what we want 3649 // on all architectures. So we check it works before relying on it. 3650 #if defined(ZERO) && defined(ASSERT) 3651 { 3652 jint a = 0xcafebabe; 3653 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3654 void *c = &a; 3655 void *d = Atomic::xchg(&c, &b); 3656 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3657 assert(c == &b && d == &a, "Atomic::xchg() works"); 3658 } 3659 #endif // ZERO && ASSERT 3660 3661 // At the moment it's only possible to have one Java VM, 3662 // since some of the runtime state is in global variables. 3663 3664 // We cannot use our mutex locks here, since they only work on 3665 // Threads. We do an atomic compare and exchange to ensure only 3666 // one thread can call this method at a time 3667 3668 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3669 // the add/dec implementations are dependent on whether we are running 3670 // on a multiprocessor Atomic::xchg does not have this problem. 3671 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) { 3672 return JNI_EEXIST; // already created, or create attempt in progress 3673 } 3674 3675 // If a previous creation attempt failed but can be retried safely, 3676 // then safe_to_recreate_vm will have been reset to 1 after being 3677 // cleared here. If a previous creation attempt succeeded and we then 3678 // destroyed that VM, we will be prevented from trying to recreate 3679 // the VM in the same process, as the value will still be 0. 3680 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3681 return JNI_ERR; 3682 } 3683 3684 /** 3685 * Certain errors during initialization are recoverable and do not 3686 * prevent this method from being called again at a later time 3687 * (perhaps with different arguments). However, at a certain 3688 * point during initialization if an error occurs we cannot allow 3689 * this function to be called again (or it will crash). In those 3690 * situations, the 'canTryAgain' flag is set to false, which atomically 3691 * sets safe_to_recreate_vm to 1, such that any new call to 3692 * JNI_CreateJavaVM will immediately fail using the above logic. 3693 */ 3694 bool can_try_again = true; 3695 3696 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3697 if (result == JNI_OK) { 3698 JavaThread *thread = JavaThread::current(); 3699 assert(!thread->has_pending_exception(), "should have returned not OK"); 3700 // thread is thread_in_vm here 3701 *vm = (JavaVM *)(&main_vm); 3702 *(JNIEnv**)penv = thread->jni_environment(); 3703 // mark creation complete for other JNI ops 3704 Atomic::release_store(&vm_created, COMPLETE); 3705 3706 #if INCLUDE_JVMCI 3707 if (EnableJVMCI) { 3708 if (UseJVMCICompiler) { 3709 // JVMCI is initialized on a CompilerThread 3710 if (BootstrapJVMCI) { 3711 JavaThread* THREAD = thread; // For exception macros. 3712 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3713 compiler->bootstrap(THREAD); 3714 if (HAS_PENDING_EXCEPTION) { 3715 HandleMark hm(THREAD); 3716 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3717 } 3718 } 3719 } 3720 } 3721 #endif 3722 3723 // Notify JVMTI 3724 if (JvmtiExport::should_post_thread_life()) { 3725 JvmtiExport::post_thread_start(thread); 3726 } 3727 3728 JFR_ONLY(Jfr::on_thread_start(thread);) 3729 3730 if (ReplayCompiles) ciReplay::replay(thread); 3731 3732 #ifdef ASSERT 3733 // Some platforms (like Win*) need a wrapper around these test 3734 // functions in order to properly handle error conditions. 3735 if (ErrorHandlerTest != 0) { 3736 VMError::controlled_crash(ErrorHandlerTest); 3737 } 3738 #endif 3739 3740 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3741 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3742 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3743 } else { 3744 // If create_vm exits because of a pending exception, exit with that 3745 // exception. In the future when we figure out how to reclaim memory, 3746 // we may be able to exit with JNI_ERR and allow the calling application 3747 // to continue. 3748 if (Universe::is_fully_initialized()) { 3749 // otherwise no pending exception possible - VM will already have aborted 3750 Thread* current = Thread::current_or_null(); 3751 if (current != nullptr) { 3752 JavaThread* THREAD = JavaThread::cast(current); // For exception macros. 3753 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists"); 3754 HandleMark hm(THREAD); 3755 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3756 } 3757 } 3758 3759 if (can_try_again) { 3760 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3761 safe_to_recreate_vm = 1; 3762 } 3763 3764 // Creation failed. We must reset vm_created 3765 *vm = 0; 3766 *(JNIEnv**)penv = 0; 3767 // reset vm_created last to avoid race condition. Use OrderAccess to 3768 // control both compiler and architectural-based reordering. 3769 assert(vm_created == IN_PROGRESS, "must be"); 3770 Atomic::release_store(&vm_created, NOT_CREATED); 3771 } 3772 3773 // Flush stdout and stderr before exit. 3774 fflush(stdout); 3775 fflush(stderr); 3776 3777 return result; 3778 3779 } 3780 3781 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3782 jint result = JNI_ERR; 3783 // On Windows, let CreateJavaVM run with SEH protection 3784 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3785 __try { 3786 #endif 3787 result = JNI_CreateJavaVM_inner(vm, penv, args); 3788 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3789 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3790 // Nothing to do. 3791 } 3792 #endif 3793 return result; 3794 } 3795 3796 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3797 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3798 3799 if (vm_created == COMPLETE) { 3800 if (numVMs != nullptr) *numVMs = 1; 3801 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3802 } else { 3803 if (numVMs != nullptr) *numVMs = 0; 3804 } 3805 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3806 return JNI_OK; 3807 } 3808 3809 extern "C" { 3810 3811 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3812 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3813 3814 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3815 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3816 jint res = JNI_ERR; 3817 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3818 3819 if (vm_created == NOT_CREATED) { 3820 res = JNI_ERR; 3821 return res; 3822 } 3823 3824 JNIEnv *env; 3825 JavaVMAttachArgs destroyargs; 3826 destroyargs.version = CurrentVersion; 3827 destroyargs.name = (char *)"DestroyJavaVM"; 3828 destroyargs.group = nullptr; 3829 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3830 if (res != JNI_OK) { 3831 return res; 3832 } 3833 3834 JavaThread* thread = JavaThread::current(); 3835 3836 // Make sure we are actually in a newly attached thread, with no 3837 // existing Java frame. 3838 if (thread->has_last_Java_frame()) { 3839 return JNI_ERR; 3840 } 3841 3842 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3843 3844 // We are going to VM, change W^X state to the expected one. 3845 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite)); 3846 3847 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3848 Threads::destroy_vm(); 3849 // Don't bother restoring thread state, VM is gone. 3850 vm_created = NOT_CREATED; 3851 return JNI_OK; 3852 } 3853 3854 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3855 jint result = JNI_ERR; 3856 // On Windows, we need SEH protection 3857 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3858 __try { 3859 #endif 3860 result = jni_DestroyJavaVM_inner(vm); 3861 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3862 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3863 // Nothing to do. 3864 } 3865 #endif 3866 return result; 3867 } 3868 3869 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3870 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3871 3872 // Check below commented out from JDK1.2fcs as well 3873 /* 3874 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3875 return JNI_EVERSION; 3876 } 3877 */ 3878 3879 Thread* t = Thread::current_or_null(); 3880 if (t != nullptr) { 3881 // If executing from an atexit hook we may be in the VMThread. 3882 if (t->is_Java_thread()) { 3883 // If the thread has been attached this operation is a no-op 3884 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment(); 3885 return JNI_OK; 3886 } else { 3887 return JNI_ERR; 3888 } 3889 } 3890 3891 // Create a thread and mark it as attaching so it will be skipped by the 3892 // ThreadsListEnumerator - see CR 6404306 3893 JavaThread* thread = new JavaThread(true); 3894 3895 // Set correct safepoint info. The thread is going to call into Java when 3896 // initializing the Java level thread object. Hence, the correct state must 3897 // be set in order for the Safepoint code to deal with it correctly. 3898 thread->set_thread_state(_thread_in_vm); 3899 thread->record_stack_base_and_size(); 3900 thread->register_thread_stack_with_NMT(); 3901 thread->initialize_thread_current(); 3902 MACOS_AARCH64_ONLY(thread->init_wx()); 3903 3904 if (!os::create_attached_thread(thread)) { 3905 thread->smr_delete(); 3906 return JNI_ERR; 3907 } 3908 // Enable stack overflow checks 3909 thread->stack_overflow_state()->create_stack_guard_pages(); 3910 3911 thread->initialize_tlab(); 3912 3913 thread->cache_global_variables(); 3914 3915 // This thread will not do a safepoint check, since it has 3916 // not been added to the Thread list yet. 3917 { MutexLocker ml(Threads_lock); 3918 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3919 // avoid this thread trying to do a GC before it is added to the thread-list 3920 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3921 Threads::add(thread, daemon); 3922 } 3923 // Create thread group and name info from attach arguments 3924 oop group = nullptr; 3925 char* thread_name = nullptr; 3926 if (args != nullptr && Threads::is_supported_jni_version(args->version)) { 3927 group = JNIHandles::resolve(args->group); 3928 thread_name = args->name; // may be null 3929 } 3930 if (group == nullptr) group = Universe::main_thread_group(); 3931 3932 // Create Java level thread object and attach it to this thread 3933 bool attach_failed = false; 3934 { 3935 EXCEPTION_MARK; 3936 HandleMark hm(THREAD); 3937 Handle thread_group(THREAD, group); 3938 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3939 if (HAS_PENDING_EXCEPTION) { 3940 CLEAR_PENDING_EXCEPTION; 3941 // cleanup outside the handle mark. 3942 attach_failed = true; 3943 } 3944 } 3945 3946 if (attach_failed) { 3947 // Added missing cleanup 3948 thread->cleanup_failed_attach_current_thread(daemon); 3949 return JNI_ERR; 3950 } 3951 3952 // mark the thread as no longer attaching 3953 // this uses a fence to push the change through so we don't have 3954 // to regrab the threads_lock 3955 thread->set_done_attaching_via_jni(); 3956 3957 // Set java thread status. 3958 java_lang_Thread::set_thread_status(thread->threadObj(), 3959 JavaThreadStatus::RUNNABLE); 3960 3961 // Notify the debugger 3962 if (JvmtiExport::should_post_thread_life()) { 3963 JvmtiExport::post_thread_start(thread); 3964 } 3965 3966 JFR_ONLY(Jfr::on_thread_start(thread);) 3967 3968 *(JNIEnv**)penv = thread->jni_environment(); 3969 3970 // Now leaving the VM, so change thread_state. This is normally automatically taken care 3971 // of in the JVM_ENTRY. But in this situation we have to do it manually. 3972 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3973 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3974 3975 // Perform any platform dependent FPU setup 3976 os::setup_fpu(); 3977 3978 return JNI_OK; 3979 } 3980 3981 3982 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 3983 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 3984 if (vm_created == NOT_CREATED) { 3985 // Not sure how we could possibly get here. 3986 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3987 return JNI_ERR; 3988 } 3989 3990 jint ret = attach_current_thread(vm, penv, _args, false); 3991 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 3992 return ret; 3993 } 3994 3995 3996 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 3997 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 3998 if (vm_created == NOT_CREATED) { 3999 // Not sure how we could possibly get here. 4000 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 4001 return JNI_ERR; 4002 } 4003 4004 Thread* current = Thread::current_or_null(); 4005 4006 // If the thread has already been detached the operation is a no-op 4007 if (current == nullptr) { 4008 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4009 return JNI_OK; 4010 } 4011 4012 // If executing from an atexit hook we may be in the VMThread. 4013 if (!current->is_Java_thread()) { 4014 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4015 return JNI_ERR; 4016 } 4017 4018 VM_Exit::block_if_vm_exited(); 4019 4020 JavaThread* thread = JavaThread::cast(current); 4021 if (thread->has_last_Java_frame()) { 4022 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4023 // Can't detach a thread that's running java, that can't work. 4024 return JNI_ERR; 4025 } 4026 4027 // We are going to VM, change W^X state to the expected one. 4028 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite)); 4029 4030 // Safepoint support. Have to do call-back to safepoint code, if in the 4031 // middle of a safepoint operation 4032 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4033 4034 // XXX: Note that JavaThread::exit() call below removes the guards on the 4035 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4036 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4037 // of the guards is visible in jni_AttachCurrentThread above, 4038 // the removal of the guards is buried below in JavaThread::exit() 4039 // here. The abstraction should be more symmetrically either exposed 4040 // or hidden (e.g. it could probably be hidden in the same 4041 // (platform-dependent) methods where we do alternate stack 4042 // maintenance work?) 4043 thread->exit(false, JavaThread::jni_detach); 4044 thread->smr_delete(); 4045 4046 // Go to the execute mode, the initial state of the thread on creation. 4047 // Use os interface as the thread is not a JavaThread anymore. 4048 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec)); 4049 4050 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4051 return JNI_OK; 4052 } 4053 4054 DT_RETURN_MARK_DECL(GetEnv, jint 4055 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4056 4057 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4058 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4059 jint ret = JNI_ERR; 4060 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4061 4062 if (vm_created == NOT_CREATED) { 4063 *penv = nullptr; 4064 ret = JNI_EDETACHED; 4065 return ret; 4066 } 4067 4068 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4069 return ret; 4070 } 4071 4072 #ifndef JVMPI_VERSION_1 4073 // need these in order to be polite about older agents 4074 #define JVMPI_VERSION_1 ((jint)0x10000001) 4075 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4076 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4077 #endif // !JVMPI_VERSION_1 4078 4079 Thread* thread = Thread::current_or_null(); 4080 if (thread != nullptr && thread->is_Java_thread()) { 4081 if (Threads::is_supported_jni_version_including_1_1(version)) { 4082 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment(); 4083 ret = JNI_OK; 4084 return ret; 4085 4086 } else if (version == JVMPI_VERSION_1 || 4087 version == JVMPI_VERSION_1_1 || 4088 version == JVMPI_VERSION_1_2) { 4089 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4090 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4091 ret = JNI_EVERSION; 4092 return ret; 4093 } else if (JvmtiExport::is_jvmdi_version(version)) { 4094 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4095 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4096 ret = JNI_EVERSION; 4097 return ret; 4098 } else { 4099 *penv = nullptr; 4100 ret = JNI_EVERSION; 4101 return ret; 4102 } 4103 } else { 4104 *penv = nullptr; 4105 ret = JNI_EDETACHED; 4106 return ret; 4107 } 4108 } 4109 4110 4111 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4112 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4113 if (vm_created == NOT_CREATED) { 4114 // Not sure how we could possibly get here. 4115 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4116 return JNI_ERR; 4117 } 4118 4119 jint ret = attach_current_thread(vm, penv, _args, true); 4120 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4121 return ret; 4122 } 4123 4124 4125 } // End extern "C" 4126 4127 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4128 nullptr, 4129 nullptr, 4130 nullptr, 4131 4132 jni_DestroyJavaVM, 4133 jni_AttachCurrentThread, 4134 jni_DetachCurrentThread, 4135 jni_GetEnv, 4136 jni_AttachCurrentThreadAsDaemon 4137 };