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