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