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