1 /* 2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * Copyright (c) 2021, Azul Systems, Inc. All rights reserved. 5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 6 * 7 * This code is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 only, as 9 * published by the Free Software Foundation. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 * 25 */ 26 27 #include "precompiled.hpp" 28 #include "ci/ciReplay.hpp" 29 #include "classfile/altHashing.hpp" 30 #include "classfile/classFileStream.hpp" 31 #include "classfile/classLoader.hpp" 32 #include "classfile/classLoadInfo.hpp" 33 #include "classfile/javaClasses.hpp" 34 #include "classfile/javaClasses.inline.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/modules.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "compiler/compiler_globals.hpp" 43 #include "gc/shared/collectedHeap.hpp" 44 #include "gc/shared/gcLocker.inline.hpp" 45 #include "gc/shared/stringdedup/stringDedup.hpp" 46 #include "interpreter/linkResolver.hpp" 47 #include "jni.h" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "memory/allocation.hpp" 51 #include "memory/allocation.inline.hpp" 52 #include "memory/oopFactory.hpp" 53 #include "memory/resourceArea.hpp" 54 #include "memory/universe.hpp" 55 #include "nmt/memTracker.hpp" 56 #include "oops/access.inline.hpp" 57 #include "oops/arrayOop.hpp" 58 #include "oops/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_21; 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 methodHandle method(THREAD, selected_method); 934 935 // Create object to hold arguments for the JavaCall, and associate it with 936 // the jni parser 937 ResourceMark rm(THREAD); 938 JavaCallArguments java_args(number_of_parameters); 939 940 // handle arguments 941 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 942 java_args.push_oop(h_recv); // Push jobject handle 943 944 // Fill out JavaCallArguments object 945 args->push_arguments_on(&java_args); 946 // Initialize result type 947 result->set_type(args->return_type()); 948 949 // Invoke the method. Result is returned as oop. 950 JavaCalls::call(result, method, &java_args, CHECK); 951 952 // Convert result 953 if (is_reference_type(result->get_type())) { 954 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 955 } 956 } 957 958 DT_RETURN_MARK_DECL(AllocObject, jobject 959 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 960 961 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 962 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 963 964 jobject ret = nullptr; 965 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 966 967 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 968 ret = JNIHandles::make_local(THREAD, i); 969 return ret; 970 JNI_END 971 972 DT_RETURN_MARK_DECL(NewObjectA, jobject 973 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 974 975 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 976 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 977 978 jobject obj = nullptr; 979 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj); 980 981 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 982 obj = JNIHandles::make_local(THREAD, i); 983 JavaValue jvalue(T_VOID); 984 JNI_ArgumentPusherArray ap(methodID, args); 985 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 986 return obj; 987 JNI_END 988 989 990 DT_RETURN_MARK_DECL(NewObjectV, jobject 991 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 992 993 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 994 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 995 996 jobject obj = nullptr; 997 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 998 999 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1000 obj = JNIHandles::make_local(THREAD, i); 1001 JavaValue jvalue(T_VOID); 1002 JNI_ArgumentPusherVaArg ap(methodID, args); 1003 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1004 return obj; 1005 JNI_END 1006 1007 1008 DT_RETURN_MARK_DECL(NewObject, jobject 1009 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1010 1011 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1012 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1013 1014 jobject obj = nullptr; 1015 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1016 1017 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1018 obj = JNIHandles::make_local(THREAD, i); 1019 va_list args; 1020 va_start(args, methodID); 1021 JavaValue jvalue(T_VOID); 1022 JNI_ArgumentPusherVaArg ap(methodID, args); 1023 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1024 va_end(args); 1025 return obj; 1026 JNI_END 1027 1028 1029 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1030 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1031 1032 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1033 jclass ret = 1034 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1035 1036 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1037 return ret; 1038 JNI_END 1039 1040 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1041 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1042 1043 jboolean ret = JNI_TRUE; 1044 if (obj != nullptr) { 1045 ret = JNI_FALSE; 1046 Klass* k = java_lang_Class::as_Klass( 1047 JNIHandles::resolve_non_null(clazz)); 1048 if (k != nullptr) { 1049 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1050 } 1051 } 1052 1053 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1054 return ret; 1055 JNI_END 1056 1057 1058 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1059 const char *sig, bool is_static, TRAPS) { 1060 // %%%% This code should probably just call into a method in the LinkResolver 1061 // 1062 // The class should have been loaded (we have an instance of the class 1063 // passed in) so the method and signature should already be in the symbol 1064 // table. If they're not there, the method doesn't exist. 1065 const char *name_to_probe = (name_str == nullptr) 1066 ? vmSymbols::object_initializer_name()->as_C_string() 1067 : name_str; 1068 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1069 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1070 1071 if (name == nullptr || signature == nullptr) { 1072 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1073 } 1074 1075 oop mirror = JNIHandles::resolve_non_null(clazz); 1076 Klass* klass = java_lang_Class::as_Klass(mirror); 1077 1078 // Throw a NoSuchMethodError exception if we have an instance of a 1079 // primitive java.lang.Class 1080 if (java_lang_Class::is_primitive(mirror)) { 1081 ResourceMark rm(THREAD); 1082 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1083 } 1084 1085 // Make sure class is linked and initialized before handing id's out to 1086 // Method*s. 1087 klass->initialize(CHECK_NULL); 1088 1089 Method* m; 1090 if (name == vmSymbols::object_initializer_name() || 1091 name == vmSymbols::class_initializer_name()) { 1092 // Never search superclasses for constructors 1093 if (klass->is_instance_klass()) { 1094 m = InstanceKlass::cast(klass)->find_method(name, signature); 1095 } else { 1096 m = nullptr; 1097 } 1098 } else { 1099 m = klass->lookup_method(name, signature); 1100 if (m == nullptr && klass->is_instance_klass()) { 1101 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1102 } 1103 } 1104 if (m == nullptr || (m->is_static() != is_static)) { 1105 ResourceMark rm(THREAD); 1106 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1107 } 1108 return m->jmethod_id(); 1109 } 1110 1111 1112 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1113 const char *name, const char *sig)) 1114 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1115 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1116 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1117 return ret; 1118 JNI_END 1119 1120 1121 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1122 const char *name, const char *sig)) 1123 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1124 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1125 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1126 return ret; 1127 JNI_END 1128 1129 1130 1131 // 1132 // Calling Methods 1133 // 1134 1135 1136 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1137 , EntryProbe, ReturnProbe) \ 1138 \ 1139 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1140 , ReturnProbe); \ 1141 \ 1142 JNI_ENTRY(ResultType, \ 1143 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1144 \ 1145 EntryProbe; \ 1146 ResultType ret = 0;\ 1147 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1148 (const ResultType&)ret);\ 1149 \ 1150 va_list args; \ 1151 va_start(args, methodID); \ 1152 JavaValue jvalue(Tag); \ 1153 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1154 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1155 va_end(args); \ 1156 ret = jvalue.get_##ResultType(); \ 1157 return ret;\ 1158 JNI_END 1159 1160 // the runtime type of subword integral basic types is integer 1161 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1162 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1163 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1164 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1165 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1166 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1167 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1168 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1169 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1170 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1171 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1172 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1173 1174 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1175 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1176 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1177 DEFINE_CALLMETHOD(jint, Int, T_INT, 1178 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1179 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1180 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1181 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1182 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1183 // Float and double probes don't return value because dtrace doesn't currently support it 1184 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1185 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1186 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1187 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1188 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1189 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1190 1191 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1192 , EntryProbe, ReturnProbe) \ 1193 \ 1194 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1195 , ReturnProbe); \ 1196 \ 1197 JNI_ENTRY(ResultType, \ 1198 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1199 \ 1200 EntryProbe;\ 1201 ResultType ret = 0;\ 1202 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1203 (const ResultType&)ret);\ 1204 \ 1205 JavaValue jvalue(Tag); \ 1206 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1207 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1208 ret = jvalue.get_##ResultType(); \ 1209 return ret;\ 1210 JNI_END 1211 1212 // the runtime type of subword integral basic types is integer 1213 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1214 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1215 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1216 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1217 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1218 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1219 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1220 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1221 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1222 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1223 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1224 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1225 1226 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1227 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1228 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1229 DEFINE_CALLMETHODV(jint, Int, T_INT, 1230 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1231 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1232 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1233 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1234 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1235 // Float and double probes don't return value because dtrace doesn't currently support it 1236 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1237 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1238 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1239 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1240 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1241 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1242 1243 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1244 , EntryProbe, ReturnProbe) \ 1245 \ 1246 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1247 , ReturnProbe); \ 1248 \ 1249 JNI_ENTRY(ResultType, \ 1250 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1251 EntryProbe; \ 1252 ResultType ret = 0;\ 1253 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1254 (const ResultType&)ret);\ 1255 \ 1256 JavaValue jvalue(Tag); \ 1257 JNI_ArgumentPusherArray ap(methodID, args); \ 1258 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1259 ret = jvalue.get_##ResultType(); \ 1260 return ret;\ 1261 JNI_END 1262 1263 // the runtime type of subword integral basic types is integer 1264 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1265 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1266 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1267 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1268 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1269 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1270 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1271 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1272 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1273 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1274 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1275 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1276 1277 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1278 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1279 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1280 DEFINE_CALLMETHODA(jint, Int, T_INT, 1281 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1282 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1283 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1284 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1285 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1286 // Float and double probes don't return value because dtrace doesn't currently support it 1287 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1288 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1289 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1290 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1291 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1292 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1293 1294 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1295 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1296 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1297 1298 1299 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1300 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1301 DT_VOID_RETURN_MARK(CallVoidMethod); 1302 1303 va_list args; 1304 va_start(args, methodID); 1305 JavaValue jvalue(T_VOID); 1306 JNI_ArgumentPusherVaArg ap(methodID, args); 1307 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1308 va_end(args); 1309 JNI_END 1310 1311 1312 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1313 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1314 DT_VOID_RETURN_MARK(CallVoidMethodV); 1315 1316 JavaValue jvalue(T_VOID); 1317 JNI_ArgumentPusherVaArg ap(methodID, args); 1318 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1319 JNI_END 1320 1321 1322 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1323 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1324 DT_VOID_RETURN_MARK(CallVoidMethodA); 1325 1326 JavaValue jvalue(T_VOID); 1327 JNI_ArgumentPusherArray ap(methodID, args); 1328 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1329 JNI_END 1330 1331 1332 1333 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1334 , EntryProbe, ReturnProbe) \ 1335 \ 1336 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1337 , ReturnProbe);\ 1338 \ 1339 JNI_ENTRY(ResultType, \ 1340 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1341 \ 1342 EntryProbe;\ 1343 ResultType ret;\ 1344 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1345 (const ResultType&)ret);\ 1346 \ 1347 va_list args; \ 1348 va_start(args, methodID); \ 1349 JavaValue jvalue(Tag); \ 1350 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1351 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1352 va_end(args); \ 1353 ret = jvalue.get_##ResultType(); \ 1354 return ret;\ 1355 JNI_END 1356 1357 // the runtime type of subword integral basic types is integer 1358 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1359 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1360 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1361 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1362 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1363 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1364 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1365 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1366 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1367 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1368 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1369 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1370 1371 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1372 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1373 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1374 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1375 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1376 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1377 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1378 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1379 // Float and double probes don't return value because dtrace doesn't currently support it 1380 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1381 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1382 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1383 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1384 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1385 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1386 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1387 1388 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1389 , EntryProbe, ReturnProbe) \ 1390 \ 1391 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1392 , ReturnProbe);\ 1393 \ 1394 JNI_ENTRY(ResultType, \ 1395 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1396 \ 1397 EntryProbe;\ 1398 ResultType ret;\ 1399 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1400 (const ResultType&)ret);\ 1401 \ 1402 JavaValue jvalue(Tag); \ 1403 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1404 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1405 ret = jvalue.get_##ResultType(); \ 1406 return ret;\ 1407 JNI_END 1408 1409 // the runtime type of subword integral basic types is integer 1410 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1411 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1412 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1413 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1414 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1415 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1416 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1417 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1418 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1419 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1420 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1421 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1422 1423 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1424 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1425 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1426 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1427 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1428 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1429 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1430 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1431 // Float and double probes don't return value because dtrace doesn't currently support it 1432 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1433 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1434 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1435 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1436 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1437 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1438 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1439 1440 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1441 , EntryProbe, ReturnProbe) \ 1442 \ 1443 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1444 , ReturnProbe);\ 1445 \ 1446 JNI_ENTRY(ResultType, \ 1447 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1448 \ 1449 EntryProbe;\ 1450 ResultType ret;\ 1451 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1452 (const ResultType&)ret);\ 1453 \ 1454 JavaValue jvalue(Tag); \ 1455 JNI_ArgumentPusherArray ap(methodID, args); \ 1456 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1457 ret = jvalue.get_##ResultType(); \ 1458 return ret;\ 1459 JNI_END 1460 1461 // the runtime type of subword integral basic types is integer 1462 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1463 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1464 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1465 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1466 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1467 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1468 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1469 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1470 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1471 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1472 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1473 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1474 1475 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1476 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1478 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1479 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1481 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1482 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1483 // Float and double probes don't return value because dtrace doesn't currently support it 1484 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1485 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1486 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1488 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1489 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1491 1492 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1493 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1494 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1495 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1496 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1497 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1498 1499 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1500 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1501 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1502 1503 va_list args; 1504 va_start(args, methodID); 1505 JavaValue jvalue(T_VOID); 1506 JNI_ArgumentPusherVaArg ap(methodID, args); 1507 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1508 va_end(args); 1509 JNI_END 1510 1511 1512 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1513 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1514 env, obj, cls, (uintptr_t) methodID); 1515 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1516 1517 JavaValue jvalue(T_VOID); 1518 JNI_ArgumentPusherVaArg ap(methodID, args); 1519 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1520 JNI_END 1521 1522 1523 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1524 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1525 env, obj, cls, (uintptr_t) methodID); 1526 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1527 JavaValue jvalue(T_VOID); 1528 JNI_ArgumentPusherArray ap(methodID, args); 1529 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1530 JNI_END 1531 1532 1533 1534 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1535 , EntryProbe, ResultProbe) \ 1536 \ 1537 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1538 , ResultProbe); \ 1539 \ 1540 JNI_ENTRY(ResultType, \ 1541 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1542 \ 1543 EntryProbe; \ 1544 ResultType ret = 0;\ 1545 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1546 (const ResultType&)ret);\ 1547 \ 1548 va_list args; \ 1549 va_start(args, methodID); \ 1550 JavaValue jvalue(Tag); \ 1551 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1552 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1553 va_end(args); \ 1554 ret = jvalue.get_##ResultType(); \ 1555 return ret;\ 1556 JNI_END 1557 1558 // the runtime type of subword integral basic types is integer 1559 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1560 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1561 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1562 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1563 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1564 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1565 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1566 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1567 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1568 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1569 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1570 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1571 1572 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1573 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1574 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1575 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1576 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1577 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1578 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1579 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1580 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1581 // Float and double probes don't return value because dtrace doesn't currently support it 1582 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1583 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1584 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1585 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1586 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1587 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1588 1589 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1590 , EntryProbe, ResultProbe) \ 1591 \ 1592 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1593 , ResultProbe); \ 1594 \ 1595 JNI_ENTRY(ResultType, \ 1596 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1597 \ 1598 EntryProbe; \ 1599 ResultType ret = 0;\ 1600 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1601 (const ResultType&)ret);\ 1602 \ 1603 JavaValue jvalue(Tag); \ 1604 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1605 /* Make sure class is initialized before trying to invoke its method */ \ 1606 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1607 k->initialize(CHECK_0); \ 1608 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1609 va_end(args); \ 1610 ret = jvalue.get_##ResultType(); \ 1611 return ret;\ 1612 JNI_END 1613 1614 // the runtime type of subword integral basic types is integer 1615 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1616 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1617 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1618 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1619 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1620 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1621 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1622 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1623 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1624 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1625 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1627 1628 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1629 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1631 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1632 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1634 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1635 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1637 // Float and double probes don't return value because dtrace doesn't currently support it 1638 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1639 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1641 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1642 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1644 1645 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1646 , EntryProbe, ResultProbe) \ 1647 \ 1648 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1649 , ResultProbe); \ 1650 \ 1651 JNI_ENTRY(ResultType, \ 1652 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1653 \ 1654 EntryProbe; \ 1655 ResultType ret = 0;\ 1656 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1657 (const ResultType&)ret);\ 1658 \ 1659 JavaValue jvalue(Tag); \ 1660 JNI_ArgumentPusherArray ap(methodID, args); \ 1661 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \ 1662 ret = jvalue.get_##ResultType(); \ 1663 return ret;\ 1664 JNI_END 1665 1666 // the runtime type of subword integral basic types is integer 1667 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1668 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1669 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1670 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1671 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1672 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1673 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1674 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1675 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1676 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1677 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1678 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1679 1680 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1681 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1683 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1684 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1685 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1686 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1687 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1689 // Float and double probes don't return value because dtrace doesn't currently support it 1690 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1691 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1692 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1693 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1694 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1695 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1696 1697 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1698 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1699 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1700 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1701 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1702 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1703 1704 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1705 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1706 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1707 1708 va_list args; 1709 va_start(args, methodID); 1710 JavaValue jvalue(T_VOID); 1711 JNI_ArgumentPusherVaArg ap(methodID, args); 1712 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1713 va_end(args); 1714 JNI_END 1715 1716 1717 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1718 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1719 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1720 1721 JavaValue jvalue(T_VOID); 1722 JNI_ArgumentPusherVaArg ap(methodID, args); 1723 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1724 JNI_END 1725 1726 1727 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1728 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1729 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1730 1731 JavaValue jvalue(T_VOID); 1732 JNI_ArgumentPusherArray ap(methodID, args); 1733 jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK); 1734 JNI_END 1735 1736 1737 // 1738 // Accessing Fields 1739 // 1740 1741 1742 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1743 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1744 1745 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1746 const char *name, const char *sig)) 1747 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1748 jfieldID ret = 0; 1749 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1750 1751 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1752 1753 // The class should have been loaded (we have an instance of the class 1754 // passed in) so the field and signature should already be in the symbol 1755 // table. If they're not there, the field doesn't exist. 1756 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1757 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1758 if (fieldname == nullptr || signame == nullptr) { 1759 ResourceMark rm; 1760 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1761 } 1762 1763 // Make sure class is initialized before handing id's out to fields 1764 k->initialize(CHECK_NULL); 1765 1766 fieldDescriptor fd; 1767 if (!k->is_instance_klass() || 1768 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1769 ResourceMark rm; 1770 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1771 } 1772 1773 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1774 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1775 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 1776 return ret; 1777 JNI_END 1778 1779 1780 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1781 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1782 oop o = JNIHandles::resolve_non_null(obj); 1783 Klass* k = o->klass(); 1784 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1785 // Keep JVMTI addition small and only check enabled flag here. 1786 // jni_GetField_probe() assumes that is okay to create handles. 1787 if (JvmtiExport::should_post_field_access()) { 1788 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1789 } 1790 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1791 jobject ret = JNIHandles::make_local(THREAD, loaded_obj); 1792 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1793 return ret; 1794 JNI_END 1795 1796 1797 1798 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1799 , EntryProbe, ReturnProbe) \ 1800 \ 1801 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1802 , ReturnProbe); \ 1803 \ 1804 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1805 \ 1806 EntryProbe; \ 1807 Return ret = 0;\ 1808 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1809 \ 1810 oop o = JNIHandles::resolve_non_null(obj); \ 1811 Klass* k = o->klass(); \ 1812 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1813 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1814 if (JvmtiExport::should_post_field_access()) { \ 1815 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \ 1816 } \ 1817 ret = o->Fieldname##_field(offset); \ 1818 return ret; \ 1819 JNI_END 1820 1821 DEFINE_GETFIELD(jboolean, bool, Boolean 1822 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1823 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1824 DEFINE_GETFIELD(jbyte, byte, Byte 1825 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1826 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1827 DEFINE_GETFIELD(jchar, char, Char 1828 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1829 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1830 DEFINE_GETFIELD(jshort, short, Short 1831 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1832 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1833 DEFINE_GETFIELD(jint, int, Int 1834 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1835 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1836 DEFINE_GETFIELD(jlong, long, Long 1837 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1838 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1839 // Float and double probes don't return value because dtrace doesn't currently support it 1840 DEFINE_GETFIELD(jfloat, float, Float 1841 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1842 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1843 DEFINE_GETFIELD(jdouble, double, Double 1844 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1845 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1846 1847 address jni_GetBooleanField_addr() { 1848 return (address)jni_GetBooleanField; 1849 } 1850 address jni_GetByteField_addr() { 1851 return (address)jni_GetByteField; 1852 } 1853 address jni_GetCharField_addr() { 1854 return (address)jni_GetCharField; 1855 } 1856 address jni_GetShortField_addr() { 1857 return (address)jni_GetShortField; 1858 } 1859 address jni_GetIntField_addr() { 1860 return (address)jni_GetIntField; 1861 } 1862 address jni_GetLongField_addr() { 1863 return (address)jni_GetLongField; 1864 } 1865 address jni_GetFloatField_addr() { 1866 return (address)jni_GetFloatField; 1867 } 1868 address jni_GetDoubleField_addr() { 1869 return (address)jni_GetDoubleField; 1870 } 1871 1872 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1873 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 1874 oop o = JNIHandles::resolve_non_null(obj); 1875 Klass* k = o->klass(); 1876 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1877 // Keep JVMTI addition small and only check enabled flag here. 1878 if (JvmtiExport::should_post_field_modification()) { 1879 jvalue field_value; 1880 field_value.l = value; 1881 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 1882 } 1883 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 1884 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 1885 JNI_END 1886 1887 // TODO: make this a template 1888 1889 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 1890 , EntryProbe, ReturnProbe) \ 1891 \ 1892 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 1893 \ 1894 EntryProbe; \ 1895 \ 1896 oop o = JNIHandles::resolve_non_null(obj); \ 1897 Klass* k = o->klass(); \ 1898 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1899 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1900 if (JvmtiExport::should_post_field_modification()) { \ 1901 jvalue field_value; \ 1902 field_value.unionType = value; \ 1903 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 1904 } \ 1905 o->Fieldname##_field_put(offset, value); \ 1906 ReturnProbe; \ 1907 JNI_END 1908 1909 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 1910 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1911 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 1912 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 1913 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1914 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 1915 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 1916 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1917 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 1918 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 1919 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1920 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 1921 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 1922 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1923 HOTSPOT_JNI_SETINTFIELD_RETURN()) 1924 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 1925 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1926 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 1927 // Float and double probes don't return value because dtrace doesn't currently support it 1928 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 1929 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1930 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 1931 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 1932 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1933 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 1934 1935 DT_RETURN_MARK_DECL(ToReflectedField, jobject 1936 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 1937 1938 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 1939 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 1940 jobject ret = nullptr; 1941 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 1942 1943 fieldDescriptor fd; 1944 bool found = false; 1945 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1946 1947 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 1948 1949 if (isStatic) { 1950 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 1951 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 1952 assert(id->is_static_field_id(), "invalid static field id"); 1953 found = id->find_local_field(&fd); 1954 } else { 1955 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 1956 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1957 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 1958 } 1959 assert(found, "bad fieldID passed into jni_ToReflectedField"); 1960 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 1961 ret = JNIHandles::make_local(THREAD, reflected); 1962 return ret; 1963 JNI_END 1964 1965 1966 // 1967 // Accessing Static Fields 1968 // 1969 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 1970 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 1971 1972 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 1973 const char *name, const char *sig)) 1974 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1975 jfieldID ret = nullptr; 1976 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 1977 1978 // The class should have been loaded (we have an instance of the class 1979 // passed in) so the field and signature should already be in the symbol 1980 // table. If they're not there, the field doesn't exist. 1981 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1982 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1983 if (fieldname == nullptr || signame == nullptr) { 1984 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 1985 } 1986 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1987 // Make sure class is initialized before handing id's out to static fields 1988 k->initialize(CHECK_NULL); 1989 1990 fieldDescriptor fd; 1991 if (!k->is_instance_klass() || 1992 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 1993 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 1994 } 1995 1996 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 1997 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 1998 debug_only(id->set_is_static_field_id();) 1999 2000 debug_only(id->verify(fd.field_holder())); 2001 2002 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2003 return ret; 2004 JNI_END 2005 2006 2007 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2008 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2009 #if INCLUDE_JNI_CHECK 2010 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2011 #endif // INCLUDE_JNI_CHECK 2012 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2013 assert(id->is_static_field_id(), "invalid static field id"); 2014 // Keep JVMTI addition small and only check enabled flag here. 2015 // jni_GetField_probe() assumes that is okay to create handles. 2016 if (JvmtiExport::should_post_field_access()) { 2017 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); 2018 } 2019 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2020 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2021 return ret; 2022 JNI_END 2023 2024 2025 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2026 , EntryProbe, ReturnProbe) \ 2027 \ 2028 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2029 , ReturnProbe); \ 2030 \ 2031 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2032 EntryProbe; \ 2033 Return ret = 0;\ 2034 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2035 (const Return&)ret);\ 2036 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2037 assert(id->is_static_field_id(), "invalid static field id"); \ 2038 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2039 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2040 if (JvmtiExport::should_post_field_access()) { \ 2041 JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \ 2042 } \ 2043 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2044 return ret;\ 2045 JNI_END 2046 2047 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2048 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2049 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2050 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2051 DEFINE_GETSTATICFIELD(jchar, char, Char 2052 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2053 DEFINE_GETSTATICFIELD(jshort, short, Short 2054 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2055 DEFINE_GETSTATICFIELD(jint, int, Int 2056 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2057 DEFINE_GETSTATICFIELD(jlong, long, Long 2058 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2059 // Float and double probes don't return value because dtrace doesn't currently support it 2060 DEFINE_GETSTATICFIELD(jfloat, float, Float 2061 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2062 DEFINE_GETSTATICFIELD(jdouble, double, Double 2063 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2064 2065 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2066 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2067 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2068 assert(id->is_static_field_id(), "invalid static field id"); 2069 // Keep JVMTI addition small and only check enabled flag here. 2070 // jni_SetField_probe() assumes that is okay to create handles. 2071 if (JvmtiExport::should_post_field_modification()) { 2072 jvalue field_value; 2073 field_value.l = value; 2074 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2075 } 2076 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2077 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2078 JNI_END 2079 2080 2081 2082 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2083 , EntryProbe, ReturnProbe) \ 2084 \ 2085 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2086 EntryProbe; \ 2087 \ 2088 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2089 assert(id->is_static_field_id(), "invalid static field id"); \ 2090 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2091 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2092 if (JvmtiExport::should_post_field_modification()) { \ 2093 jvalue field_value; \ 2094 field_value.unionType = value; \ 2095 JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2096 } \ 2097 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2098 ReturnProbe;\ 2099 JNI_END 2100 2101 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2102 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2103 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2104 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2105 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2106 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2107 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2108 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2109 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2110 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2111 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2112 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2113 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2114 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2115 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2116 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2117 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2118 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2119 // Float and double probes don't return value because dtrace doesn't currently support it 2120 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2121 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2122 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2123 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2124 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2125 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2126 2127 // 2128 // String Operations 2129 // 2130 2131 // Unicode Interface 2132 2133 DT_RETURN_MARK_DECL(NewString, jstring 2134 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2135 2136 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2137 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2138 jstring ret = nullptr; 2139 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2140 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2141 ret = (jstring) JNIHandles::make_local(THREAD, string); 2142 return ret; 2143 JNI_END 2144 2145 2146 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2147 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2148 jsize ret = 0; 2149 oop s = JNIHandles::resolve_non_null(string); 2150 ret = java_lang_String::length(s); 2151 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2152 return ret; 2153 JNI_END 2154 2155 2156 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2157 JNIEnv *env, jstring string, jboolean *isCopy)) 2158 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2159 jchar* buf = nullptr; 2160 oop s = JNIHandles::resolve_non_null(string); 2161 typeArrayOop s_value = java_lang_String::value(s); 2162 if (s_value != nullptr) { 2163 int s_len = java_lang_String::length(s, s_value); 2164 bool is_latin1 = java_lang_String::is_latin1(s); 2165 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2166 /* JNI Specification states return null on OOM */ 2167 if (buf != nullptr) { 2168 if (s_len > 0) { 2169 if (!is_latin1) { 2170 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2171 buf, s_len); 2172 } else { 2173 for (int i = 0; i < s_len; i++) { 2174 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2175 } 2176 } 2177 } 2178 buf[s_len] = 0; 2179 //%note jni_5 2180 if (isCopy != nullptr) { 2181 *isCopy = JNI_TRUE; 2182 } 2183 } 2184 } 2185 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2186 return buf; 2187 JNI_END 2188 2189 2190 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2191 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2192 //%note jni_6 2193 if (chars != nullptr) { 2194 // Since String objects are supposed to be immutable, don't copy any 2195 // new data back. A bad user will have to go after the char array. 2196 FreeHeap((void*) chars); 2197 } 2198 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2199 JNI_END 2200 2201 2202 // UTF Interface 2203 2204 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2205 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2206 2207 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2208 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2209 jstring ret; 2210 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2211 2212 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2213 ret = (jstring) JNIHandles::make_local(THREAD, result); 2214 return ret; 2215 JNI_END 2216 2217 2218 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2219 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2220 oop java_string = JNIHandles::resolve_non_null(string); 2221 jsize ret = java_lang_String::utf8_length(java_string); 2222 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2223 return ret; 2224 JNI_END 2225 2226 2227 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2228 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2229 char* result = nullptr; 2230 oop java_string = JNIHandles::resolve_non_null(string); 2231 typeArrayOop s_value = java_lang_String::value(java_string); 2232 if (s_value != nullptr) { 2233 size_t length = java_lang_String::utf8_length(java_string, s_value); 2234 /* JNI Specification states return null on OOM */ 2235 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL); 2236 if (result != nullptr) { 2237 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2238 if (isCopy != nullptr) { 2239 *isCopy = JNI_TRUE; 2240 } 2241 } 2242 } 2243 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2244 return result; 2245 JNI_END 2246 2247 2248 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2249 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2250 if (chars != nullptr) { 2251 FreeHeap((char*) chars); 2252 } 2253 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2254 JNI_END 2255 2256 2257 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2258 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2259 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2260 assert(a->is_array(), "must be array"); 2261 jsize ret = a->length(); 2262 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2263 return ret; 2264 JNI_END 2265 2266 2267 // 2268 // Object Array Operations 2269 // 2270 2271 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2272 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2273 2274 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2275 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2276 jobjectArray ret = nullptr; 2277 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2278 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2279 Klass* ak = ek->array_klass(CHECK_NULL); 2280 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2281 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2282 oop initial_value = JNIHandles::resolve(initialElement); 2283 if (initial_value != nullptr) { // array already initialized with null 2284 for (int index = 0; index < length; index++) { 2285 result->obj_at_put(index, initial_value); 2286 } 2287 } 2288 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2289 return ret; 2290 JNI_END 2291 2292 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2293 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2294 2295 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2296 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2297 jobject ret = nullptr; 2298 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2299 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2300 if (a->is_within_bounds(index)) { 2301 ret = JNIHandles::make_local(THREAD, a->obj_at(index)); 2302 return ret; 2303 } else { 2304 ResourceMark rm(THREAD); 2305 stringStream ss; 2306 ss.print("Index %d out of bounds for length %d", index, a->length()); 2307 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2308 } 2309 JNI_END 2310 2311 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2312 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2313 2314 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2315 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2316 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2317 2318 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2319 oop v = JNIHandles::resolve(value); 2320 if (a->is_within_bounds(index)) { 2321 if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2322 a->obj_at_put(index, v); 2323 } else { 2324 ResourceMark rm(THREAD); 2325 stringStream ss; 2326 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2327 ss.print("type mismatch: can not store %s to %s[%d]", 2328 v->klass()->external_name(), 2329 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2330 index); 2331 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2332 ss.print("[]"); 2333 } 2334 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2335 } 2336 } else { 2337 ResourceMark rm(THREAD); 2338 stringStream ss; 2339 ss.print("Index %d out of bounds for length %d", index, a->length()); 2340 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2341 } 2342 JNI_END 2343 2344 2345 2346 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2347 ,EntryProbe,ReturnProbe) \ 2348 \ 2349 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2350 , ReturnProbe); \ 2351 \ 2352 JNI_ENTRY(Return, \ 2353 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2354 EntryProbe; \ 2355 Return ret = nullptr;\ 2356 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2357 \ 2358 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2359 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2360 return ret;\ 2361 JNI_END 2362 2363 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2364 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2365 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2366 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2367 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2368 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2369 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2370 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2371 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2372 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2373 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2374 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2375 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2376 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2377 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2378 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2379 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2380 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2381 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2382 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2383 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2384 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2385 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2386 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2387 2388 // Return an address which will fault if the caller writes to it. 2389 2390 static char* get_bad_address() { 2391 static char* bad_address = nullptr; 2392 if (bad_address == nullptr) { 2393 size_t size = os::vm_allocation_granularity(); 2394 bad_address = os::reserve_memory(size); 2395 if (bad_address != nullptr) { 2396 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2397 /*is_committed*/false); 2398 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2399 } 2400 } 2401 return bad_address; 2402 } 2403 2404 2405 2406 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2407 , EntryProbe, ReturnProbe) \ 2408 \ 2409 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2410 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2411 EntryProbe; \ 2412 /* allocate an chunk of memory in c land */ \ 2413 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2414 ElementType* result; \ 2415 int len = a->length(); \ 2416 if (len == 0) { \ 2417 if (isCopy != nullptr) { \ 2418 *isCopy = JNI_FALSE; \ 2419 } \ 2420 /* Empty array: legal but useless, can't return null. \ 2421 * Return a pointer to something useless. \ 2422 * Avoid asserts in typeArrayOop. */ \ 2423 result = (ElementType*)get_bad_address(); \ 2424 } else { \ 2425 /* JNI Specification states return null on OOM */ \ 2426 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2427 if (result != nullptr) { \ 2428 /* copy the array to the c chunk */ \ 2429 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2430 result, len); \ 2431 if (isCopy) { \ 2432 *isCopy = JNI_TRUE; \ 2433 } \ 2434 } \ 2435 } \ 2436 ReturnProbe; \ 2437 return result; \ 2438 JNI_END 2439 2440 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2441 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2442 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2443 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2444 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2445 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2446 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2447 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2448 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2449 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2450 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2451 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2452 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2453 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2454 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2455 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2456 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2457 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2458 // Float and double probes don't return value because dtrace doesn't currently support it 2459 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2460 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2461 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2462 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2463 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2464 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2465 2466 2467 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2468 , EntryProbe, ReturnProbe);\ 2469 \ 2470 JNI_ENTRY_NO_PRESERVE(void, \ 2471 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2472 ElementType *buf, jint mode)) \ 2473 EntryProbe; \ 2474 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2475 int len = a->length(); \ 2476 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2477 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2478 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2479 } \ 2480 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2481 FreeHeap(buf); \ 2482 } \ 2483 } \ 2484 ReturnProbe; \ 2485 JNI_END 2486 2487 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2488 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2489 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2490 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2491 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2492 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2493 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2494 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2495 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2496 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2497 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2498 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2499 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2500 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2501 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2502 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2503 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2504 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2505 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2506 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2507 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2508 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2509 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2510 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2511 2512 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2513 ResourceMark rm(THREAD); 2514 if (copy_len < 0) { 2515 stringStream ss; 2516 ss.print("Length %d is negative", copy_len); 2517 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2518 } else if (start < 0 || (start > array_len - copy_len)) { 2519 stringStream ss; 2520 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2521 start, (int64_t)start+(int64_t)copy_len, array_len); 2522 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2523 } 2524 } 2525 2526 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2527 , EntryProbe, ReturnProbe); \ 2528 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2529 , ReturnProbe); \ 2530 \ 2531 JNI_ENTRY(void, \ 2532 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2533 jsize len, ElementType *buf)) \ 2534 EntryProbe; \ 2535 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2536 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2537 check_bounds(start, len, src->length(), CHECK); \ 2538 if (len > 0) { \ 2539 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2540 } \ 2541 JNI_END 2542 2543 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2544 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2545 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2546 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2547 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2548 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2549 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2550 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2551 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2552 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2553 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2554 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2555 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2556 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2557 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2558 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2559 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2560 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2561 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2562 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2563 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2564 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2565 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2566 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2567 2568 2569 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2570 , EntryProbe, ReturnProbe); \ 2571 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2572 ,ReturnProbe); \ 2573 \ 2574 JNI_ENTRY(void, \ 2575 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2576 jsize len, const ElementType *buf)) \ 2577 EntryProbe; \ 2578 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2579 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2580 check_bounds(start, len, dst->length(), CHECK); \ 2581 if (len > 0) { \ 2582 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2583 } \ 2584 JNI_END 2585 2586 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2587 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2588 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2589 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2590 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2591 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2592 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2593 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2594 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2595 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2596 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2597 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2598 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2599 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2600 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2601 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2602 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2603 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2604 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2605 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2606 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2607 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2608 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2609 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2610 2611 2612 DT_RETURN_MARK_DECL(RegisterNatives, jint 2613 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2614 2615 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2616 const JNINativeMethod *methods, 2617 jint nMethods)) 2618 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2619 jint ret = 0; 2620 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2621 2622 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2623 2624 // There are no restrictions on native code registering native methods, 2625 // which allows agents to redefine the bindings to native methods, however 2626 // we issue a warning if any code running outside of the boot/platform 2627 // loader is rebinding any native methods in classes loaded by the 2628 // boot/platform loader that are in named modules. That will catch changes 2629 // to platform classes while excluding classes added to the bootclasspath. 2630 bool do_warning = false; 2631 2632 // Only instanceKlasses can have native methods 2633 if (k->is_instance_klass()) { 2634 oop cl = k->class_loader(); 2635 InstanceKlass* ik = InstanceKlass::cast(k); 2636 // Check for a platform class 2637 if ((cl == nullptr || SystemDictionary::is_platform_class_loader(cl)) && 2638 ik->module()->is_named()) { 2639 Klass* caller = thread->security_get_caller_class(1); 2640 // If no caller class, or caller class has a different loader, then 2641 // issue a warning below. 2642 do_warning = (caller == nullptr) || caller->class_loader() != cl; 2643 } 2644 } 2645 2646 2647 for (int index = 0; index < nMethods; index++) { 2648 const char* meth_name = methods[index].name; 2649 const char* meth_sig = methods[index].signature; 2650 int meth_name_len = (int)strlen(meth_name); 2651 2652 // The class should have been loaded (we have an instance of the class 2653 // passed in) so the method and signature should already be in the symbol 2654 // table. If they're not there, the method doesn't exist. 2655 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2656 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2657 2658 if (name == nullptr || signature == nullptr) { 2659 ResourceMark rm(THREAD); 2660 stringStream st; 2661 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2662 // Must return negative value on failure 2663 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2664 } 2665 2666 if (do_warning) { 2667 ResourceMark rm(THREAD); 2668 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2669 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2670 } 2671 2672 bool res = Method::register_native(k, name, signature, 2673 (address) methods[index].fnPtr, THREAD); 2674 if (!res) { 2675 ret = -1; 2676 break; 2677 } 2678 } 2679 return ret; 2680 JNI_END 2681 2682 2683 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2684 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2685 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2686 //%note jni_2 2687 if (k->is_instance_klass()) { 2688 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2689 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2690 if (m->is_native()) { 2691 m->clear_native_function(); 2692 m->set_signature_handler(nullptr); 2693 } 2694 } 2695 } 2696 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2697 return 0; 2698 JNI_END 2699 2700 // 2701 // Monitor functions 2702 // 2703 2704 DT_RETURN_MARK_DECL(MonitorEnter, jint 2705 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2706 2707 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2708 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2709 jint ret = JNI_ERR; 2710 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2711 2712 // If the object is null, we can't do anything with it 2713 if (jobj == nullptr) { 2714 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2715 } 2716 2717 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2718 ObjectSynchronizer::jni_enter(obj, thread); 2719 return JNI_OK; 2720 JNI_END 2721 2722 DT_RETURN_MARK_DECL(MonitorExit, jint 2723 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2724 2725 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2726 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2727 jint ret = JNI_ERR; 2728 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2729 2730 // Don't do anything with a null object 2731 if (jobj == nullptr) { 2732 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2733 } 2734 2735 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2736 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2737 return JNI_OK; 2738 JNI_END 2739 2740 // 2741 // Extensions 2742 // 2743 2744 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2745 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2746 2747 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2748 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2749 DT_VOID_RETURN_MARK(GetStringRegion); 2750 oop s = JNIHandles::resolve_non_null(string); 2751 typeArrayOop s_value = java_lang_String::value(s); 2752 int s_len = java_lang_String::length(s, s_value); 2753 if (start < 0 || len < 0 || start > s_len - len) { 2754 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2755 } else { 2756 if (len > 0) { 2757 bool is_latin1 = java_lang_String::is_latin1(s); 2758 if (!is_latin1) { 2759 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2760 buf, len); 2761 } else { 2762 for (int i = 0; i < len; i++) { 2763 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2764 } 2765 } 2766 } 2767 } 2768 JNI_END 2769 2770 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2771 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2772 2773 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2774 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2775 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2776 oop s = JNIHandles::resolve_non_null(string); 2777 typeArrayOop s_value = java_lang_String::value(s); 2778 int s_len = java_lang_String::length(s, s_value); 2779 if (start < 0 || len < 0 || start > s_len - len) { 2780 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2781 } else { 2782 //%note jni_7 2783 if (len > 0) { 2784 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2785 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2786 // as_utf8_string null-terminates the result string 2787 } else { 2788 // JDK null-terminates the buffer even in len is zero 2789 if (buf != nullptr) { 2790 buf[0] = 0; 2791 } 2792 } 2793 } 2794 JNI_END 2795 2796 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2797 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2798 Handle a(thread, JNIHandles::resolve_non_null(array)); 2799 assert(a->is_typeArray(), "just checking"); 2800 2801 // Pin object 2802 Universe::heap()->pin_object(thread, a()); 2803 2804 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 2805 void* ret = arrayOop(a())->base(type); 2806 if (isCopy != nullptr) { 2807 *isCopy = JNI_FALSE; 2808 } 2809 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2810 return ret; 2811 JNI_END 2812 2813 2814 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2815 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 2816 // Unpin object 2817 Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array)); 2818 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 2819 JNI_END 2820 2821 2822 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 2823 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 2824 oop s = JNIHandles::resolve_non_null(string); 2825 jchar* ret; 2826 if (!java_lang_String::is_latin1(s)) { 2827 typeArrayHandle s_value(thread, java_lang_String::value(s)); 2828 2829 // Pin value array 2830 Universe::heap()->pin_object(thread, s_value()); 2831 2832 ret = (jchar*) s_value->base(T_CHAR); 2833 if (isCopy != nullptr) *isCopy = JNI_FALSE; 2834 } else { 2835 // Inflate latin1 encoded string to UTF16 2836 typeArrayOop s_value = java_lang_String::value(s); 2837 int s_len = java_lang_String::length(s, s_value); 2838 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2839 /* JNI Specification states return null on OOM */ 2840 if (ret != nullptr) { 2841 for (int i = 0; i < s_len; i++) { 2842 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2843 } 2844 ret[s_len] = 0; 2845 } 2846 if (isCopy != nullptr) *isCopy = JNI_TRUE; 2847 } 2848 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 2849 return ret; 2850 JNI_END 2851 2852 2853 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 2854 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 2855 oop s = JNIHandles::resolve_non_null(str); 2856 bool is_latin1 = java_lang_String::is_latin1(s); 2857 2858 if (is_latin1) { 2859 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 2860 // This assumes that ReleaseStringCritical bookends GetStringCritical. 2861 FREE_C_HEAP_ARRAY(jchar, chars); 2862 } else { 2863 // StringDedup can have replaced the value array, so don't fetch the array from 's'. 2864 // Instead, we calculate the address based on the jchar array exposed with GetStringCritical. 2865 oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR)); 2866 2867 // Unpin value array 2868 Universe::heap()->unpin_object(thread, value); 2869 } 2870 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 2871 JNI_END 2872 2873 2874 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 2875 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 2876 Handle ref_handle(thread, JNIHandles::resolve(ref)); 2877 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 2878 if (ret == nullptr && ref_handle.not_null()) { 2879 THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr); 2880 } 2881 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 2882 return ret; 2883 JNI_END 2884 2885 // Must be JNI_ENTRY (with HandleMark) 2886 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 2887 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 2888 JNIHandles::destroy_weak_global(ref); 2889 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 2890 JNI_END 2891 2892 2893 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 2894 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 2895 jni_check_async_exceptions(thread); 2896 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 2897 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 2898 return ret; 2899 JNI_END 2900 2901 2902 // Initialization state for three routines below relating to 2903 // java.nio.DirectBuffers 2904 static int directBufferSupportInitializeStarted = 0; 2905 static volatile int directBufferSupportInitializeEnded = 0; 2906 static volatile int directBufferSupportInitializeFailed = 0; 2907 static jclass bufferClass = nullptr; 2908 static jclass directBufferClass = nullptr; 2909 static jclass directByteBufferClass = nullptr; 2910 static jmethodID directByteBufferConstructor = nullptr; 2911 static jfieldID directBufferAddressField = nullptr; 2912 static jfieldID bufferCapacityField = nullptr; 2913 2914 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 2915 Handle loader; // null (bootstrap) loader 2916 Handle protection_domain; // null protection domain 2917 2918 TempNewSymbol sym = SymbolTable::new_symbol(name); 2919 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 2920 2921 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 2922 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 2923 } 2924 return result; 2925 } 2926 2927 // These lookups are done with the null (bootstrap) ClassLoader to 2928 // circumvent any security checks that would be done by jni_FindClass. 2929 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 2930 { 2931 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == nullptr) { return false; } 2932 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == nullptr) { return false; } 2933 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; } 2934 return true; 2935 } 2936 JNI_END 2937 2938 2939 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 2940 if (directBufferSupportInitializeFailed) { 2941 return false; 2942 } 2943 2944 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 2945 if (!lookupDirectBufferClasses(env)) { 2946 directBufferSupportInitializeFailed = 1; 2947 return false; 2948 } 2949 2950 // Make global references for these 2951 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 2952 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 2953 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 2954 2955 // Global refs will be null if out-of-memory (no exception is pending) 2956 if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) { 2957 directBufferSupportInitializeFailed = 1; 2958 return false; 2959 } 2960 2961 // Get needed field and method IDs 2962 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V"); 2963 if (env->ExceptionCheck()) { 2964 env->ExceptionClear(); 2965 directBufferSupportInitializeFailed = 1; 2966 return false; 2967 } 2968 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 2969 if (env->ExceptionCheck()) { 2970 env->ExceptionClear(); 2971 directBufferSupportInitializeFailed = 1; 2972 return false; 2973 } 2974 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 2975 if (env->ExceptionCheck()) { 2976 env->ExceptionClear(); 2977 directBufferSupportInitializeFailed = 1; 2978 return false; 2979 } 2980 2981 if ((directByteBufferConstructor == nullptr) || 2982 (directBufferAddressField == nullptr) || 2983 (bufferCapacityField == nullptr)) { 2984 directBufferSupportInitializeFailed = 1; 2985 return false; 2986 } 2987 2988 directBufferSupportInitializeEnded = 1; 2989 } else { 2990 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 2991 os::naked_yield(); 2992 } 2993 } 2994 2995 return !directBufferSupportInitializeFailed; 2996 } 2997 2998 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 2999 { 3000 // thread_from_jni_environment() will block if VM is gone. 3001 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3002 3003 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3004 3005 if (!directBufferSupportInitializeEnded) { 3006 if (!initializeDirectBufferSupport(env, thread)) { 3007 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr); 3008 return nullptr; 3009 } 3010 } 3011 3012 // Being paranoid about accidental sign extension on address 3013 jlong addr = (jlong) ((uintptr_t) address); 3014 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity); 3015 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3016 return ret; 3017 } 3018 3019 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3020 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3021 3022 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3023 { 3024 // thread_from_jni_environment() will block if VM is gone. 3025 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3026 3027 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3028 void* ret = nullptr; 3029 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3030 3031 if (!directBufferSupportInitializeEnded) { 3032 if (!initializeDirectBufferSupport(env, thread)) { 3033 return 0; 3034 } 3035 } 3036 3037 if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) { 3038 return 0; 3039 } 3040 3041 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3042 return ret; 3043 } 3044 3045 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3046 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3047 3048 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3049 { 3050 // thread_from_jni_environment() will block if VM is gone. 3051 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3052 3053 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3054 jlong ret = -1; 3055 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3056 3057 if (!directBufferSupportInitializeEnded) { 3058 if (!initializeDirectBufferSupport(env, thread)) { 3059 ret = 0; 3060 return ret; 3061 } 3062 } 3063 3064 if (buf == nullptr) { 3065 return -1; 3066 } 3067 3068 if (!env->IsInstanceOf(buf, directBufferClass)) { 3069 return -1; 3070 } 3071 3072 // NOTE that capacity is currently an int in the implementation 3073 ret = env->GetIntField(buf, bufferCapacityField); 3074 return ret; 3075 } 3076 3077 3078 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3079 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3080 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3081 return CurrentVersion; 3082 JNI_END 3083 3084 extern struct JavaVM_ main_vm; 3085 3086 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3087 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3088 *vm = (JavaVM *)(&main_vm); 3089 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3090 return JNI_OK; 3091 JNI_END 3092 3093 3094 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3095 return Modules::get_module(clazz, THREAD); 3096 JNI_END 3097 3098 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj)) 3099 oop thread_obj = JNIHandles::resolve_external_guard(obj); 3100 if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) { 3101 return JNI_TRUE; 3102 } else { 3103 return JNI_FALSE; 3104 } 3105 JNI_END 3106 3107 3108 // Structure containing all jni functions 3109 struct JNINativeInterface_ jni_NativeInterface = { 3110 nullptr, 3111 nullptr, 3112 nullptr, 3113 3114 nullptr, 3115 3116 jni_GetVersion, 3117 3118 jni_DefineClass, 3119 jni_FindClass, 3120 3121 jni_FromReflectedMethod, 3122 jni_FromReflectedField, 3123 3124 jni_ToReflectedMethod, 3125 3126 jni_GetSuperclass, 3127 jni_IsAssignableFrom, 3128 3129 jni_ToReflectedField, 3130 3131 jni_Throw, 3132 jni_ThrowNew, 3133 jni_ExceptionOccurred, 3134 jni_ExceptionDescribe, 3135 jni_ExceptionClear, 3136 jni_FatalError, 3137 3138 jni_PushLocalFrame, 3139 jni_PopLocalFrame, 3140 3141 jni_NewGlobalRef, 3142 jni_DeleteGlobalRef, 3143 jni_DeleteLocalRef, 3144 jni_IsSameObject, 3145 3146 jni_NewLocalRef, 3147 jni_EnsureLocalCapacity, 3148 3149 jni_AllocObject, 3150 jni_NewObject, 3151 jni_NewObjectV, 3152 jni_NewObjectA, 3153 3154 jni_GetObjectClass, 3155 jni_IsInstanceOf, 3156 3157 jni_GetMethodID, 3158 3159 jni_CallObjectMethod, 3160 jni_CallObjectMethodV, 3161 jni_CallObjectMethodA, 3162 jni_CallBooleanMethod, 3163 jni_CallBooleanMethodV, 3164 jni_CallBooleanMethodA, 3165 jni_CallByteMethod, 3166 jni_CallByteMethodV, 3167 jni_CallByteMethodA, 3168 jni_CallCharMethod, 3169 jni_CallCharMethodV, 3170 jni_CallCharMethodA, 3171 jni_CallShortMethod, 3172 jni_CallShortMethodV, 3173 jni_CallShortMethodA, 3174 jni_CallIntMethod, 3175 jni_CallIntMethodV, 3176 jni_CallIntMethodA, 3177 jni_CallLongMethod, 3178 jni_CallLongMethodV, 3179 jni_CallLongMethodA, 3180 jni_CallFloatMethod, 3181 jni_CallFloatMethodV, 3182 jni_CallFloatMethodA, 3183 jni_CallDoubleMethod, 3184 jni_CallDoubleMethodV, 3185 jni_CallDoubleMethodA, 3186 jni_CallVoidMethod, 3187 jni_CallVoidMethodV, 3188 jni_CallVoidMethodA, 3189 3190 jni_CallNonvirtualObjectMethod, 3191 jni_CallNonvirtualObjectMethodV, 3192 jni_CallNonvirtualObjectMethodA, 3193 jni_CallNonvirtualBooleanMethod, 3194 jni_CallNonvirtualBooleanMethodV, 3195 jni_CallNonvirtualBooleanMethodA, 3196 jni_CallNonvirtualByteMethod, 3197 jni_CallNonvirtualByteMethodV, 3198 jni_CallNonvirtualByteMethodA, 3199 jni_CallNonvirtualCharMethod, 3200 jni_CallNonvirtualCharMethodV, 3201 jni_CallNonvirtualCharMethodA, 3202 jni_CallNonvirtualShortMethod, 3203 jni_CallNonvirtualShortMethodV, 3204 jni_CallNonvirtualShortMethodA, 3205 jni_CallNonvirtualIntMethod, 3206 jni_CallNonvirtualIntMethodV, 3207 jni_CallNonvirtualIntMethodA, 3208 jni_CallNonvirtualLongMethod, 3209 jni_CallNonvirtualLongMethodV, 3210 jni_CallNonvirtualLongMethodA, 3211 jni_CallNonvirtualFloatMethod, 3212 jni_CallNonvirtualFloatMethodV, 3213 jni_CallNonvirtualFloatMethodA, 3214 jni_CallNonvirtualDoubleMethod, 3215 jni_CallNonvirtualDoubleMethodV, 3216 jni_CallNonvirtualDoubleMethodA, 3217 jni_CallNonvirtualVoidMethod, 3218 jni_CallNonvirtualVoidMethodV, 3219 jni_CallNonvirtualVoidMethodA, 3220 3221 jni_GetFieldID, 3222 3223 jni_GetObjectField, 3224 jni_GetBooleanField, 3225 jni_GetByteField, 3226 jni_GetCharField, 3227 jni_GetShortField, 3228 jni_GetIntField, 3229 jni_GetLongField, 3230 jni_GetFloatField, 3231 jni_GetDoubleField, 3232 3233 jni_SetObjectField, 3234 jni_SetBooleanField, 3235 jni_SetByteField, 3236 jni_SetCharField, 3237 jni_SetShortField, 3238 jni_SetIntField, 3239 jni_SetLongField, 3240 jni_SetFloatField, 3241 jni_SetDoubleField, 3242 3243 jni_GetStaticMethodID, 3244 3245 jni_CallStaticObjectMethod, 3246 jni_CallStaticObjectMethodV, 3247 jni_CallStaticObjectMethodA, 3248 jni_CallStaticBooleanMethod, 3249 jni_CallStaticBooleanMethodV, 3250 jni_CallStaticBooleanMethodA, 3251 jni_CallStaticByteMethod, 3252 jni_CallStaticByteMethodV, 3253 jni_CallStaticByteMethodA, 3254 jni_CallStaticCharMethod, 3255 jni_CallStaticCharMethodV, 3256 jni_CallStaticCharMethodA, 3257 jni_CallStaticShortMethod, 3258 jni_CallStaticShortMethodV, 3259 jni_CallStaticShortMethodA, 3260 jni_CallStaticIntMethod, 3261 jni_CallStaticIntMethodV, 3262 jni_CallStaticIntMethodA, 3263 jni_CallStaticLongMethod, 3264 jni_CallStaticLongMethodV, 3265 jni_CallStaticLongMethodA, 3266 jni_CallStaticFloatMethod, 3267 jni_CallStaticFloatMethodV, 3268 jni_CallStaticFloatMethodA, 3269 jni_CallStaticDoubleMethod, 3270 jni_CallStaticDoubleMethodV, 3271 jni_CallStaticDoubleMethodA, 3272 jni_CallStaticVoidMethod, 3273 jni_CallStaticVoidMethodV, 3274 jni_CallStaticVoidMethodA, 3275 3276 jni_GetStaticFieldID, 3277 3278 jni_GetStaticObjectField, 3279 jni_GetStaticBooleanField, 3280 jni_GetStaticByteField, 3281 jni_GetStaticCharField, 3282 jni_GetStaticShortField, 3283 jni_GetStaticIntField, 3284 jni_GetStaticLongField, 3285 jni_GetStaticFloatField, 3286 jni_GetStaticDoubleField, 3287 3288 jni_SetStaticObjectField, 3289 jni_SetStaticBooleanField, 3290 jni_SetStaticByteField, 3291 jni_SetStaticCharField, 3292 jni_SetStaticShortField, 3293 jni_SetStaticIntField, 3294 jni_SetStaticLongField, 3295 jni_SetStaticFloatField, 3296 jni_SetStaticDoubleField, 3297 3298 jni_NewString, 3299 jni_GetStringLength, 3300 jni_GetStringChars, 3301 jni_ReleaseStringChars, 3302 3303 jni_NewStringUTF, 3304 jni_GetStringUTFLength, 3305 jni_GetStringUTFChars, 3306 jni_ReleaseStringUTFChars, 3307 3308 jni_GetArrayLength, 3309 3310 jni_NewObjectArray, 3311 jni_GetObjectArrayElement, 3312 jni_SetObjectArrayElement, 3313 3314 jni_NewBooleanArray, 3315 jni_NewByteArray, 3316 jni_NewCharArray, 3317 jni_NewShortArray, 3318 jni_NewIntArray, 3319 jni_NewLongArray, 3320 jni_NewFloatArray, 3321 jni_NewDoubleArray, 3322 3323 jni_GetBooleanArrayElements, 3324 jni_GetByteArrayElements, 3325 jni_GetCharArrayElements, 3326 jni_GetShortArrayElements, 3327 jni_GetIntArrayElements, 3328 jni_GetLongArrayElements, 3329 jni_GetFloatArrayElements, 3330 jni_GetDoubleArrayElements, 3331 3332 jni_ReleaseBooleanArrayElements, 3333 jni_ReleaseByteArrayElements, 3334 jni_ReleaseCharArrayElements, 3335 jni_ReleaseShortArrayElements, 3336 jni_ReleaseIntArrayElements, 3337 jni_ReleaseLongArrayElements, 3338 jni_ReleaseFloatArrayElements, 3339 jni_ReleaseDoubleArrayElements, 3340 3341 jni_GetBooleanArrayRegion, 3342 jni_GetByteArrayRegion, 3343 jni_GetCharArrayRegion, 3344 jni_GetShortArrayRegion, 3345 jni_GetIntArrayRegion, 3346 jni_GetLongArrayRegion, 3347 jni_GetFloatArrayRegion, 3348 jni_GetDoubleArrayRegion, 3349 3350 jni_SetBooleanArrayRegion, 3351 jni_SetByteArrayRegion, 3352 jni_SetCharArrayRegion, 3353 jni_SetShortArrayRegion, 3354 jni_SetIntArrayRegion, 3355 jni_SetLongArrayRegion, 3356 jni_SetFloatArrayRegion, 3357 jni_SetDoubleArrayRegion, 3358 3359 jni_RegisterNatives, 3360 jni_UnregisterNatives, 3361 3362 jni_MonitorEnter, 3363 jni_MonitorExit, 3364 3365 jni_GetJavaVM, 3366 3367 jni_GetStringRegion, 3368 jni_GetStringUTFRegion, 3369 3370 jni_GetPrimitiveArrayCritical, 3371 jni_ReleasePrimitiveArrayCritical, 3372 3373 jni_GetStringCritical, 3374 jni_ReleaseStringCritical, 3375 3376 jni_NewWeakGlobalRef, 3377 jni_DeleteWeakGlobalRef, 3378 3379 jni_ExceptionCheck, 3380 3381 jni_NewDirectByteBuffer, 3382 jni_GetDirectBufferAddress, 3383 jni_GetDirectBufferCapacity, 3384 3385 // New 1_6 features 3386 3387 jni_GetObjectRefType, 3388 3389 // Module features 3390 3391 jni_GetModule, 3392 3393 // Virtual threads 3394 3395 jni_IsVirtualThread 3396 }; 3397 3398 3399 // For jvmti use to modify jni function table. 3400 // Java threads in native contiues to run until it is transitioned 3401 // to VM at safepoint. Before the transition or before it is blocked 3402 // for safepoint it may access jni function table. VM could crash if 3403 // any java thread access the jni function table in the middle of memcpy. 3404 // To avoid this each function pointers are copied automically. 3405 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3406 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3407 intptr_t *a = (intptr_t *) jni_functions(); 3408 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3409 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3410 Atomic::store(a++, *b++); 3411 } 3412 } 3413 3414 void quicken_jni_functions() { 3415 // Replace Get<Primitive>Field with fast versions 3416 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) { 3417 address func; 3418 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3419 if (func != (address)-1) { 3420 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3421 } 3422 func = JNI_FastGetField::generate_fast_get_byte_field(); 3423 if (func != (address)-1) { 3424 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3425 } 3426 func = JNI_FastGetField::generate_fast_get_char_field(); 3427 if (func != (address)-1) { 3428 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3429 } 3430 func = JNI_FastGetField::generate_fast_get_short_field(); 3431 if (func != (address)-1) { 3432 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3433 } 3434 func = JNI_FastGetField::generate_fast_get_int_field(); 3435 if (func != (address)-1) { 3436 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3437 } 3438 func = JNI_FastGetField::generate_fast_get_long_field(); 3439 if (func != (address)-1) { 3440 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3441 } 3442 func = JNI_FastGetField::generate_fast_get_float_field(); 3443 if (func != (address)-1) { 3444 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3445 } 3446 func = JNI_FastGetField::generate_fast_get_double_field(); 3447 if (func != (address)-1) { 3448 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3449 } 3450 } 3451 } 3452 3453 // Returns the function structure 3454 struct JNINativeInterface_* jni_functions() { 3455 #if INCLUDE_JNI_CHECK 3456 if (CheckJNICalls) return jni_functions_check(); 3457 #endif // INCLUDE_JNI_CHECK 3458 return &jni_NativeInterface; 3459 } 3460 3461 // Returns the function structure 3462 struct JNINativeInterface_* jni_functions_nocheck() { 3463 return &jni_NativeInterface; 3464 } 3465 3466 3467 // Invocation API 3468 3469 3470 // Forward declaration 3471 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3472 3473 // Global invocation API vars 3474 enum VM_Creation_State { 3475 NOT_CREATED = 0, 3476 IN_PROGRESS, // Most JNI operations are permitted during this phase to 3477 // allow for initialization actions by libraries and agents. 3478 COMPLETE 3479 }; 3480 3481 volatile VM_Creation_State vm_created = NOT_CREATED; 3482 3483 // Indicate whether it is safe to recreate VM. Recreation is only 3484 // possible after a failed initial creation attempt in some cases. 3485 volatile int safe_to_recreate_vm = 1; 3486 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3487 3488 3489 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3490 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3491 3492 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3493 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3494 3495 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3496 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3497 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3498 jint ret = JNI_ERR; 3499 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3500 3501 if (Threads::is_supported_jni_version(args->version)) { 3502 ret = JNI_OK; 3503 } 3504 // 1.1 style no longer supported in hotspot. 3505 // According the JNI spec, we should update args->version on return. 3506 // We also use the structure to communicate with launcher about default 3507 // stack size. 3508 if (args->version == JNI_VERSION_1_1) { 3509 args->version = JNI_VERSION_1_2; 3510 // javaStackSize is int in arguments structure 3511 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3512 args->javaStackSize = (jint)(ThreadStackSize * K); 3513 } 3514 return ret; 3515 } 3516 3517 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3518 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3519 3520 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3521 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3522 3523 jint result = JNI_ERR; 3524 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3525 3526 // We're about to use Atomic::xchg for synchronization. Some Zero 3527 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3528 // but __sync_lock_test_and_set is not guaranteed to do what we want 3529 // on all architectures. So we check it works before relying on it. 3530 #if defined(ZERO) && defined(ASSERT) 3531 { 3532 jint a = 0xcafebabe; 3533 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3534 void *c = &a; 3535 void *d = Atomic::xchg(&c, &b); 3536 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3537 assert(c == &b && d == &a, "Atomic::xchg() works"); 3538 } 3539 #endif // ZERO && ASSERT 3540 3541 // At the moment it's only possible to have one Java VM, 3542 // since some of the runtime state is in global variables. 3543 3544 // We cannot use our mutex locks here, since they only work on 3545 // Threads. We do an atomic compare and exchange to ensure only 3546 // one thread can call this method at a time 3547 3548 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3549 // the add/dec implementations are dependent on whether we are running 3550 // on a multiprocessor Atomic::xchg does not have this problem. 3551 if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) { 3552 return JNI_EEXIST; // already created, or create attempt in progress 3553 } 3554 3555 // If a previous creation attempt failed but can be retried safely, 3556 // then safe_to_recreate_vm will have been reset to 1 after being 3557 // cleared here. If a previous creation attempt succeeded and we then 3558 // destroyed that VM, we will be prevented from trying to recreate 3559 // the VM in the same process, as the value will still be 0. 3560 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3561 return JNI_ERR; 3562 } 3563 3564 /** 3565 * Certain errors during initialization are recoverable and do not 3566 * prevent this method from being called again at a later time 3567 * (perhaps with different arguments). However, at a certain 3568 * point during initialization if an error occurs we cannot allow 3569 * this function to be called again (or it will crash). In those 3570 * situations, the 'canTryAgain' flag is set to false, which atomically 3571 * sets safe_to_recreate_vm to 1, such that any new call to 3572 * JNI_CreateJavaVM will immediately fail using the above logic. 3573 */ 3574 bool can_try_again = true; 3575 3576 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3577 if (result == JNI_OK) { 3578 JavaThread *thread = JavaThread::current(); 3579 assert(!thread->has_pending_exception(), "should have returned not OK"); 3580 // thread is thread_in_vm here 3581 *vm = (JavaVM *)(&main_vm); 3582 *(JNIEnv**)penv = thread->jni_environment(); 3583 // mark creation complete for other JNI ops 3584 Atomic::release_store(&vm_created, COMPLETE); 3585 3586 #if INCLUDE_JVMCI 3587 if (EnableJVMCI) { 3588 if (UseJVMCICompiler) { 3589 // JVMCI is initialized on a CompilerThread 3590 if (BootstrapJVMCI) { 3591 JavaThread* THREAD = thread; // For exception macros. 3592 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3593 compiler->bootstrap(THREAD); 3594 if (HAS_PENDING_EXCEPTION) { 3595 HandleMark hm(THREAD); 3596 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3597 } 3598 } 3599 } 3600 } 3601 #endif 3602 3603 // Notify JVMTI 3604 if (JvmtiExport::should_post_thread_life()) { 3605 JvmtiExport::post_thread_start(thread); 3606 } 3607 3608 JFR_ONLY(Jfr::on_thread_start(thread);) 3609 3610 if (ReplayCompiles) ciReplay::replay(thread); 3611 3612 #ifdef ASSERT 3613 // Some platforms (like Win*) need a wrapper around these test 3614 // functions in order to properly handle error conditions. 3615 if (ErrorHandlerTest != 0) { 3616 VMError::controlled_crash(ErrorHandlerTest); 3617 } 3618 #endif 3619 3620 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3621 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3622 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3623 } else { 3624 // If create_vm exits because of a pending exception, exit with that 3625 // exception. In the future when we figure out how to reclaim memory, 3626 // we may be able to exit with JNI_ERR and allow the calling application 3627 // to continue. 3628 if (Universe::is_fully_initialized()) { 3629 // otherwise no pending exception possible - VM will already have aborted 3630 Thread* current = Thread::current_or_null(); 3631 if (current != nullptr) { 3632 JavaThread* THREAD = JavaThread::cast(current); // For exception macros. 3633 assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists"); 3634 HandleMark hm(THREAD); 3635 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3636 } 3637 } 3638 3639 if (can_try_again) { 3640 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3641 safe_to_recreate_vm = 1; 3642 } 3643 3644 // Creation failed. We must reset vm_created 3645 *vm = 0; 3646 *(JNIEnv**)penv = 0; 3647 // reset vm_created last to avoid race condition. Use OrderAccess to 3648 // control both compiler and architectural-based reordering. 3649 assert(vm_created == IN_PROGRESS, "must be"); 3650 Atomic::release_store(&vm_created, NOT_CREATED); 3651 } 3652 3653 // Flush stdout and stderr before exit. 3654 fflush(stdout); 3655 fflush(stderr); 3656 3657 return result; 3658 3659 } 3660 3661 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3662 jint result = JNI_ERR; 3663 // On Windows, let CreateJavaVM run with SEH protection 3664 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3665 __try { 3666 #endif 3667 result = JNI_CreateJavaVM_inner(vm, penv, args); 3668 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3669 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3670 // Nothing to do. 3671 } 3672 #endif 3673 return result; 3674 } 3675 3676 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3677 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3678 3679 if (vm_created == COMPLETE) { 3680 if (numVMs != nullptr) *numVMs = 1; 3681 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3682 } else { 3683 if (numVMs != nullptr) *numVMs = 0; 3684 } 3685 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3686 return JNI_OK; 3687 } 3688 3689 extern "C" { 3690 3691 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3692 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3693 3694 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3695 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3696 jint res = JNI_ERR; 3697 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3698 3699 if (vm_created == NOT_CREATED) { 3700 res = JNI_ERR; 3701 return res; 3702 } 3703 3704 JNIEnv *env; 3705 JavaVMAttachArgs destroyargs; 3706 destroyargs.version = CurrentVersion; 3707 destroyargs.name = (char *)"DestroyJavaVM"; 3708 destroyargs.group = nullptr; 3709 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3710 if (res != JNI_OK) { 3711 return res; 3712 } 3713 3714 JavaThread* thread = JavaThread::current(); 3715 3716 // Make sure we are actually in a newly attached thread, with no 3717 // existing Java frame. 3718 if (thread->has_last_Java_frame()) { 3719 return JNI_ERR; 3720 } 3721 3722 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3723 3724 // We are going to VM, change W^X state to the expected one. 3725 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite)); 3726 3727 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3728 Threads::destroy_vm(); 3729 // Don't bother restoring thread state, VM is gone. 3730 vm_created = NOT_CREATED; 3731 return JNI_OK; 3732 } 3733 3734 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3735 jint result = JNI_ERR; 3736 // On Windows, we need SEH protection 3737 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3738 __try { 3739 #endif 3740 result = jni_DestroyJavaVM_inner(vm); 3741 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3742 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3743 // Nothing to do. 3744 } 3745 #endif 3746 return result; 3747 } 3748 3749 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3750 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3751 3752 // Check below commented out from JDK1.2fcs as well 3753 /* 3754 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3755 return JNI_EVERSION; 3756 } 3757 */ 3758 3759 Thread* t = Thread::current_or_null(); 3760 if (t != nullptr) { 3761 // If executing from an atexit hook we may be in the VMThread. 3762 if (t->is_Java_thread()) { 3763 // If the thread has been attached this operation is a no-op 3764 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment(); 3765 return JNI_OK; 3766 } else { 3767 return JNI_ERR; 3768 } 3769 } 3770 3771 // Create a thread and mark it as attaching so it will be skipped by the 3772 // ThreadsListEnumerator - see CR 6404306 3773 JavaThread* thread = new JavaThread(true); 3774 3775 // Set correct safepoint info. The thread is going to call into Java when 3776 // initializing the Java level thread object. Hence, the correct state must 3777 // be set in order for the Safepoint code to deal with it correctly. 3778 thread->set_thread_state(_thread_in_vm); 3779 thread->record_stack_base_and_size(); 3780 thread->register_thread_stack_with_NMT(); 3781 thread->initialize_thread_current(); 3782 MACOS_AARCH64_ONLY(thread->init_wx()); 3783 3784 if (!os::create_attached_thread(thread)) { 3785 thread->smr_delete(); 3786 return JNI_ERR; 3787 } 3788 // Enable stack overflow checks 3789 thread->stack_overflow_state()->create_stack_guard_pages(); 3790 3791 thread->initialize_tlab(); 3792 3793 thread->cache_global_variables(); 3794 3795 // This thread will not do a safepoint check, since it has 3796 // not been added to the Thread list yet. 3797 { MutexLocker ml(Threads_lock); 3798 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3799 // avoid this thread trying to do a GC before it is added to the thread-list 3800 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3801 Threads::add(thread, daemon); 3802 } 3803 // Create thread group and name info from attach arguments 3804 oop group = nullptr; 3805 char* thread_name = nullptr; 3806 if (args != nullptr && Threads::is_supported_jni_version(args->version)) { 3807 group = JNIHandles::resolve(args->group); 3808 thread_name = args->name; // may be null 3809 } 3810 if (group == nullptr) group = Universe::main_thread_group(); 3811 3812 // Create Java level thread object and attach it to this thread 3813 bool attach_failed = false; 3814 { 3815 EXCEPTION_MARK; 3816 HandleMark hm(THREAD); 3817 Handle thread_group(THREAD, group); 3818 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3819 if (HAS_PENDING_EXCEPTION) { 3820 CLEAR_PENDING_EXCEPTION; 3821 // cleanup outside the handle mark. 3822 attach_failed = true; 3823 } 3824 } 3825 3826 if (attach_failed) { 3827 // Added missing cleanup 3828 thread->cleanup_failed_attach_current_thread(daemon); 3829 return JNI_ERR; 3830 } 3831 3832 // mark the thread as no longer attaching 3833 // this uses a fence to push the change through so we don't have 3834 // to regrab the threads_lock 3835 thread->set_done_attaching_via_jni(); 3836 3837 // Set java thread status. 3838 java_lang_Thread::set_thread_status(thread->threadObj(), 3839 JavaThreadStatus::RUNNABLE); 3840 3841 // Notify the debugger 3842 if (JvmtiExport::should_post_thread_life()) { 3843 JvmtiExport::post_thread_start(thread); 3844 } 3845 3846 JFR_ONLY(Jfr::on_thread_start(thread);) 3847 3848 *(JNIEnv**)penv = thread->jni_environment(); 3849 3850 // Now leaving the VM, so change thread_state. This is normally automatically taken care 3851 // of in the JVM_ENTRY. But in this situation we have to do it manually. 3852 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3853 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3854 3855 // Perform any platform dependent FPU setup 3856 os::setup_fpu(); 3857 3858 return JNI_OK; 3859 } 3860 3861 3862 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 3863 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 3864 if (vm_created == NOT_CREATED) { 3865 // Not sure how we could possibly get here. 3866 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3867 return JNI_ERR; 3868 } 3869 3870 jint ret = attach_current_thread(vm, penv, _args, false); 3871 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 3872 return ret; 3873 } 3874 3875 3876 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 3877 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 3878 if (vm_created == NOT_CREATED) { 3879 // Not sure how we could possibly get here. 3880 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 3881 return JNI_ERR; 3882 } 3883 3884 Thread* current = Thread::current_or_null(); 3885 3886 // If the thread has already been detached the operation is a no-op 3887 if (current == nullptr) { 3888 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 3889 return JNI_OK; 3890 } 3891 3892 // If executing from an atexit hook we may be in the VMThread. 3893 if (!current->is_Java_thread()) { 3894 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3895 return JNI_ERR; 3896 } 3897 3898 VM_Exit::block_if_vm_exited(); 3899 3900 JavaThread* thread = JavaThread::cast(current); 3901 if (thread->has_last_Java_frame()) { 3902 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 3903 // Can't detach a thread that's running java, that can't work. 3904 return JNI_ERR; 3905 } 3906 3907 // We are going to VM, change W^X state to the expected one. 3908 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite)); 3909 3910 // Safepoint support. Have to do call-back to safepoint code, if in the 3911 // middle of a safepoint operation 3912 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3913 3914 // XXX: Note that JavaThread::exit() call below removes the guards on the 3915 // stack pages set up via enable_stack_{red,yellow}_zone() calls 3916 // above in jni_AttachCurrentThread. Unfortunately, while the setting 3917 // of the guards is visible in jni_AttachCurrentThread above, 3918 // the removal of the guards is buried below in JavaThread::exit() 3919 // here. The abstraction should be more symmetrically either exposed 3920 // or hidden (e.g. it could probably be hidden in the same 3921 // (platform-dependent) methods where we do alternate stack 3922 // maintenance work?) 3923 thread->exit(false, JavaThread::jni_detach); 3924 thread->smr_delete(); 3925 3926 // Go to the execute mode, the initial state of the thread on creation. 3927 // Use os interface as the thread is not a JavaThread anymore. 3928 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec)); 3929 3930 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 3931 return JNI_OK; 3932 } 3933 3934 DT_RETURN_MARK_DECL(GetEnv, jint 3935 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 3936 3937 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 3938 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 3939 jint ret = JNI_ERR; 3940 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 3941 3942 if (vm_created == NOT_CREATED) { 3943 *penv = nullptr; 3944 ret = JNI_EDETACHED; 3945 return ret; 3946 } 3947 3948 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 3949 return ret; 3950 } 3951 3952 #ifndef JVMPI_VERSION_1 3953 // need these in order to be polite about older agents 3954 #define JVMPI_VERSION_1 ((jint)0x10000001) 3955 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 3956 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 3957 #endif // !JVMPI_VERSION_1 3958 3959 Thread* thread = Thread::current_or_null(); 3960 if (thread != nullptr && thread->is_Java_thread()) { 3961 if (Threads::is_supported_jni_version_including_1_1(version)) { 3962 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment(); 3963 ret = JNI_OK; 3964 return ret; 3965 3966 } else if (version == JVMPI_VERSION_1 || 3967 version == JVMPI_VERSION_1_1 || 3968 version == JVMPI_VERSION_1_2) { 3969 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 3970 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 3971 ret = JNI_EVERSION; 3972 return ret; 3973 } else if (JvmtiExport::is_jvmdi_version(version)) { 3974 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 3975 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 3976 ret = JNI_EVERSION; 3977 return ret; 3978 } else { 3979 *penv = nullptr; 3980 ret = JNI_EVERSION; 3981 return ret; 3982 } 3983 } else { 3984 *penv = nullptr; 3985 ret = JNI_EDETACHED; 3986 return ret; 3987 } 3988 } 3989 3990 3991 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 3992 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 3993 if (vm_created == NOT_CREATED) { 3994 // Not sure how we could possibly get here. 3995 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 3996 return JNI_ERR; 3997 } 3998 3999 jint ret = attach_current_thread(vm, penv, _args, true); 4000 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4001 return ret; 4002 } 4003 4004 4005 } // End extern "C" 4006 4007 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4008 nullptr, 4009 nullptr, 4010 nullptr, 4011 4012 jni_DestroyJavaVM, 4013 jni_AttachCurrentThread, 4014 jni_DetachCurrentThread, 4015 jni_GetEnv, 4016 jni_AttachCurrentThreadAsDaemon 4017 };