1 /* 2 * Copyright (c) 1997, 2022, 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 "jfr/jfrEvents.hpp" 48 #include "jfr/support/jfrThreadId.hpp" 49 #include "jni.h" 50 #include "jvm.h" 51 #include "logging/log.hpp" 52 #include "memory/allocation.hpp" 53 #include "memory/allocation.inline.hpp" 54 #include "memory/oopFactory.hpp" 55 #include "memory/resourceArea.hpp" 56 #include "memory/universe.hpp" 57 #include "oops/access.inline.hpp" 58 #include "oops/arrayOop.hpp" 59 #include "oops/flatArrayOop.inline.hpp" 60 #include "oops/inlineKlass.inline.hpp" 61 #include "oops/instanceKlass.inline.hpp" 62 #include "oops/instanceOop.hpp" 63 #include "oops/klass.inline.hpp" 64 #include "oops/markWord.hpp" 65 #include "oops/method.hpp" 66 #include "oops/objArrayKlass.hpp" 67 #include "oops/objArrayOop.inline.hpp" 68 #include "oops/oop.inline.hpp" 69 #include "oops/symbol.hpp" 70 #include "oops/typeArrayKlass.hpp" 71 #include "oops/typeArrayOop.inline.hpp" 72 #include "prims/jniCheck.hpp" 73 #include "prims/jniExport.hpp" 74 #include "prims/jniFastGetField.hpp" 75 #include "prims/jvm_misc.hpp" 76 #include "prims/jvmtiExport.hpp" 77 #include "prims/jvmtiThreadState.hpp" 78 #include "runtime/arguments.hpp" 79 #include "runtime/atomic.hpp" 80 #include "runtime/fieldDescriptor.inline.hpp" 81 #include "runtime/handles.inline.hpp" 82 #include "runtime/interfaceSupport.inline.hpp" 83 #include "runtime/java.hpp" 84 #include "runtime/javaCalls.hpp" 85 #include "runtime/javaThread.inline.hpp" 86 #include "runtime/jfieldIDWorkaround.hpp" 87 #include "runtime/jniHandles.inline.hpp" 88 #include "runtime/reflection.hpp" 89 #include "runtime/safepointVerifiers.hpp" 90 #include "runtime/sharedRuntime.hpp" 91 #include "runtime/signature.hpp" 92 #include "runtime/synchronizer.hpp" 93 #include "runtime/thread.inline.hpp" 94 #include "runtime/vmOperations.hpp" 95 #include "services/memTracker.hpp" 96 #include "services/runtimeService.hpp" 97 #include "utilities/defaultStream.hpp" 98 #include "utilities/dtrace.hpp" 99 #include "utilities/events.hpp" 100 #include "utilities/macros.hpp" 101 #include "utilities/vmError.hpp" 102 #if INCLUDE_JVMCI 103 #include "jvmci/jvmciCompiler.hpp" 104 #endif 105 106 static jint CurrentVersion = JNI_VERSION_20; 107 108 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 109 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 110 #endif 111 112 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 113 // '-return' probe regardless of the return path is taken out of the function. 114 // Methods that have multiple return paths use this to avoid having to 115 // instrument each return path. Methods that use CHECK or THROW must use this 116 // since those macros can cause an immediate uninstrumented return. 117 // 118 // In order to get the return value, a reference to the variable containing 119 // the return value must be passed to the constructor of the object, and 120 // the return value must be set before return (since the mark object has 121 // a reference to it). 122 // 123 // Example: 124 // DT_RETURN_MARK_DECL(SomeFunc, int); 125 // JNI_ENTRY(int, SomeFunc, ...) 126 // int return_value = 0; 127 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 128 // foo(CHECK_0) 129 // return_value = 5; 130 // return return_value; 131 // JNI_END 132 #define DT_RETURN_MARK_DECL(name, type, probe) \ 133 DTRACE_ONLY( \ 134 class DTraceReturnProbeMark_##name { \ 135 public: \ 136 const type& _ret_ref; \ 137 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 138 ~DTraceReturnProbeMark_##name() { \ 139 probe; \ 140 } \ 141 } \ 142 ) 143 // Void functions are simpler since there's no return value 144 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 145 DTRACE_ONLY( \ 146 class DTraceReturnProbeMark_##name { \ 147 public: \ 148 ~DTraceReturnProbeMark_##name() { \ 149 probe; \ 150 } \ 151 } \ 152 ) 153 154 // Place these macros in the function to mark the return. Non-void 155 // functions need the type and address of the return value. 156 #define DT_RETURN_MARK(name, type, ref) \ 157 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 158 #define DT_VOID_RETURN_MARK(name) \ 159 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 160 161 162 // Use these to select distinct code for floating-point vs. non-floating point 163 // situations. Used from within common macros where we need slightly 164 // different behavior for Float/Double 165 #define FP_SELECT_Boolean(intcode, fpcode) intcode 166 #define FP_SELECT_Byte(intcode, fpcode) intcode 167 #define FP_SELECT_Char(intcode, fpcode) intcode 168 #define FP_SELECT_Short(intcode, fpcode) intcode 169 #define FP_SELECT_Object(intcode, fpcode) intcode 170 #define FP_SELECT_Int(intcode, fpcode) intcode 171 #define FP_SELECT_Long(intcode, fpcode) intcode 172 #define FP_SELECT_Float(intcode, fpcode) fpcode 173 #define FP_SELECT_Double(intcode, fpcode) fpcode 174 #define FP_SELECT(TypeName, intcode, fpcode) \ 175 FP_SELECT_##TypeName(intcode, fpcode) 176 177 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 178 // (dtrace doesn't do FP yet) 179 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 180 FP_SELECT(TypeName, \ 181 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 182 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 183 FP_SELECT(TypeName, \ 184 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 185 186 187 // out-of-line helpers for class jfieldIDWorkaround: 188 189 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 190 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 191 uintptr_t as_uint = (uintptr_t) id; 192 intptr_t offset = raw_instance_offset(id); 193 if (is_checked_jfieldID(id)) { 194 if (!klass_hash_ok(k, id)) { 195 return false; 196 } 197 } 198 return InstanceKlass::cast(k)->contains_field_offset(offset); 199 } else { 200 JNIid* result = (JNIid*) id; 201 #ifdef ASSERT 202 return result != NULL && result->is_static_field_id(); 203 #else 204 return result != NULL; 205 #endif 206 } 207 } 208 209 210 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 211 if (offset <= small_offset_mask) { 212 Klass* field_klass = k; 213 Klass* super_klass = field_klass->super(); 214 // With compressed oops the most super class with nonstatic fields would 215 // be the owner of fields embedded in the header. 216 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 217 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 218 field_klass = super_klass; // super contains the field also 219 super_klass = field_klass->super(); 220 } 221 debug_only(NoSafepointVerifier nosafepoint;) 222 uintptr_t klass_hash = field_klass->identity_hash(); 223 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 224 } else { 225 #if 0 226 #ifndef PRODUCT 227 { 228 ResourceMark rm; 229 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 230 } 231 #endif 232 #endif 233 return 0; 234 } 235 } 236 237 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 238 uintptr_t as_uint = (uintptr_t) id; 239 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 240 do { 241 debug_only(NoSafepointVerifier nosafepoint;) 242 // Could use a non-blocking query for identity_hash here... 243 if ((k->identity_hash() & klass_mask) == klass_hash) 244 return true; 245 k = k->super(); 246 } while (k != NULL); 247 return false; 248 } 249 250 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 251 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 252 uintptr_t as_uint = (uintptr_t) id; 253 intptr_t offset = raw_instance_offset(id); 254 if (VerifyJNIFields) { 255 if (is_checked_jfieldID(id)) { 256 guarantee(klass_hash_ok(k, id), 257 "Bug in native code: jfieldID class must match object"); 258 } else { 259 #if 0 260 #ifndef PRODUCT 261 if (Verbose) { 262 ResourceMark rm; 263 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 264 } 265 #endif 266 #endif 267 } 268 } 269 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 270 "Bug in native code: jfieldID offset must address interior of object"); 271 } 272 273 // Implementation of JNI entries 274 275 DT_RETURN_MARK_DECL(DefineClass, jclass 276 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 277 278 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 279 const jbyte *buf, jsize bufLen)) 280 HOTSPOT_JNI_DEFINECLASS_ENTRY( 281 env, (char*) name, loaderRef, (char*) buf, bufLen); 282 283 jclass cls = NULL; 284 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 285 286 // Class resolution will get the class name from the .class stream if the name is null. 287 TempNewSymbol class_name = name == NULL ? NULL : 288 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 289 CHECK_NULL); 290 291 ResourceMark rm(THREAD); 292 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 293 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 294 Handle protection_domain; 295 ClassLoadInfo cl_info(protection_domain); 296 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name, 297 class_loader, 298 cl_info, 299 CHECK_NULL); 300 301 if (log_is_enabled(Debug, class, resolve)) { 302 trace_class_resolution(k); 303 } 304 305 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror()); 306 return cls; 307 JNI_END 308 309 310 311 DT_RETURN_MARK_DECL(FindClass, jclass 312 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 313 314 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 315 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 316 317 jclass result = NULL; 318 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 319 320 // This should be ClassNotFoundException imo. 321 TempNewSymbol class_name = 322 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 323 CHECK_NULL); 324 325 //%note jni_3 326 Handle protection_domain; 327 // Find calling class 328 Klass* k = thread->security_get_caller_class(0); 329 // default to the system loader when no context 330 Handle loader(THREAD, SystemDictionary::java_system_loader()); 331 if (k != NULL) { 332 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 333 // in the correct class context. 334 if (k->class_loader() == NULL && 335 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) { 336 JavaValue result(T_OBJECT); 337 JavaCalls::call_static(&result, k, 338 vmSymbols::getFromClass_name(), 339 vmSymbols::void_class_signature(), 340 CHECK_NULL); 341 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns 342 // a non-NULL Class object. When invoked from JNI_OnUnload, 343 // it will return NULL to indicate no context. 344 oop mirror = result.get_oop(); 345 if (mirror != NULL) { 346 Klass* fromClass = java_lang_Class::as_Klass(mirror); 347 loader = Handle(THREAD, fromClass->class_loader()); 348 protection_domain = Handle(THREAD, fromClass->protection_domain()); 349 } 350 } else { 351 loader = Handle(THREAD, k->class_loader()); 352 } 353 } 354 355 result = find_class_from_class_loader(env, class_name, true, loader, 356 protection_domain, true, thread); 357 358 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 359 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 360 } 361 362 return result; 363 JNI_END 364 365 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 366 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 367 368 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 369 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 370 371 jmethodID ret = NULL; 372 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 373 374 // method is a handle to a java.lang.reflect.Method object 375 oop reflected = JNIHandles::resolve_non_null(method); 376 oop mirror = NULL; 377 int slot = 0; 378 379 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) { 380 mirror = java_lang_reflect_Constructor::clazz(reflected); 381 slot = java_lang_reflect_Constructor::slot(reflected); 382 } else { 383 assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type"); 384 mirror = java_lang_reflect_Method::clazz(reflected); 385 slot = java_lang_reflect_Method::slot(reflected); 386 } 387 Klass* k1 = java_lang_Class::as_Klass(mirror); 388 389 // Make sure class is initialized before handing id's out to methods 390 k1->initialize(CHECK_NULL); 391 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 392 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 393 return ret; 394 JNI_END 395 396 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 397 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 398 399 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 400 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 401 402 jfieldID ret = NULL; 403 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 404 405 // field is a handle to a java.lang.reflect.Field object 406 oop reflected = JNIHandles::resolve_non_null(field); 407 oop mirror = java_lang_reflect_Field::clazz(reflected); 408 Klass* k1 = java_lang_Class::as_Klass(mirror); 409 int slot = java_lang_reflect_Field::slot(reflected); 410 int modifiers = java_lang_reflect_Field::modifiers(reflected); 411 412 // Make sure class is initialized before handing id's out to fields 413 k1->initialize(CHECK_NULL); 414 415 // First check if this is a static field 416 if (modifiers & JVM_ACC_STATIC) { 417 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 418 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 419 assert(id != NULL, "corrupt Field object"); 420 debug_only(id->set_is_static_field_id();) 421 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 422 ret = jfieldIDWorkaround::to_static_jfieldID(id); 423 return ret; 424 } 425 426 // The slot is the index of the field description in the field-array 427 // The jfieldID is the offset of the field within the object 428 // It may also have hash bits for k, if VerifyJNIFields is turned on. 429 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 430 bool is_inlined = InstanceKlass::cast(k1)->field_is_inlined(slot); 431 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 432 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_inlined); 433 return ret; 434 JNI_END 435 436 437 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 438 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 439 440 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 441 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 442 443 jobject ret = NULL; 444 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 445 446 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 447 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 448 oop reflection_method; 449 if (m->is_object_constructor() || m->is_static_vnew_factory()) { 450 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 451 } else { 452 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 453 } 454 ret = JNIHandles::make_local(THREAD, reflection_method); 455 return ret; 456 JNI_END 457 458 DT_RETURN_MARK_DECL(GetSuperclass, jclass 459 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 460 461 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 462 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 463 464 jclass obj = NULL; 465 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 466 467 oop mirror = JNIHandles::resolve_non_null(sub); 468 // primitive classes return NULL 469 if (java_lang_Class::is_primitive(mirror)) return NULL; 470 471 // Rules of Class.getSuperClass as implemented by KLass::java_super: 472 // arrays return Object 473 // interfaces return NULL 474 // proper classes return Klass::super() 475 Klass* k = java_lang_Class::as_Klass(mirror); 476 if (k->is_interface()) return NULL; 477 478 // return mirror for superclass 479 Klass* super = k->java_super(); 480 // super2 is the value computed by the compiler's getSuperClass intrinsic: 481 debug_only(Klass* super2 = ( k->is_array_klass() 482 ? vmClasses::Object_klass() 483 : k->super() ) ); 484 assert(super == super2, 485 "java_super computation depends on interface, array, other super"); 486 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(THREAD, super->java_mirror()); 487 return obj; 488 JNI_END 489 490 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 491 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 492 493 oop sub_mirror = JNIHandles::resolve_non_null(sub); 494 oop super_mirror = JNIHandles::resolve_non_null(super); 495 if (java_lang_Class::is_primitive(sub_mirror) || 496 java_lang_Class::is_primitive(super_mirror)) { 497 jboolean ret = (sub_mirror == super_mirror); 498 499 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 500 return ret; 501 } 502 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 503 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 504 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 505 jboolean ret; 506 if (sub_klass == super_klass && sub_klass->is_inline_klass()) { 507 // val type is a subtype of ref type 508 InlineKlass* ik = InlineKlass::cast(sub_klass); 509 if (sub_mirror == super_mirror || (ik->val_mirror() == sub_mirror && ik->ref_mirror() == super_mirror)) { 510 ret = JNI_TRUE; 511 } else { 512 ret = JNI_FALSE; 513 } 514 } else { 515 ret = sub_klass->is_subtype_of(super_klass) ? JNI_TRUE : JNI_FALSE; 516 } 517 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 518 return ret; 519 JNI_END 520 521 522 DT_RETURN_MARK_DECL(Throw, jint 523 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 524 525 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 526 HOTSPOT_JNI_THROW_ENTRY(env, obj); 527 528 jint ret = JNI_OK; 529 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 530 531 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 532 ShouldNotReachHere(); 533 return 0; // Mute compiler. 534 JNI_END 535 536 537 DT_RETURN_MARK_DECL(ThrowNew, jint 538 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 539 540 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 541 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 542 543 jint ret = JNI_OK; 544 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 545 546 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 547 Symbol* name = k->name(); 548 Handle class_loader (THREAD, k->class_loader()); 549 Handle protection_domain (THREAD, k->protection_domain()); 550 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 551 ShouldNotReachHere(); 552 return 0; // Mute compiler. 553 JNI_END 554 555 556 // JNI functions only transform a pending async exception to a synchronous 557 // exception in ExceptionOccurred and ExceptionCheck calls, since 558 // delivering an async exception in other places won't change the native 559 // code's control flow and would be harmful when native code further calls 560 // JNI functions with a pending exception. Async exception is also checked 561 // during the call, so ExceptionOccurred/ExceptionCheck won't return 562 // false but deliver the async exception at the very end during 563 // state transition. 564 565 static void jni_check_async_exceptions(JavaThread *thread) { 566 assert(thread == Thread::current(), "must be itself"); 567 if (thread->has_async_exception_condition()) { 568 SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */); 569 } 570 } 571 572 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 573 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 574 575 jni_check_async_exceptions(thread); 576 oop exception = thread->pending_exception(); 577 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception); 578 579 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 580 return ret; 581 JNI_END 582 583 584 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 585 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 586 587 if (thread->has_pending_exception()) { 588 Handle ex(thread, thread->pending_exception()); 589 thread->clear_pending_exception(); 590 jio_fprintf(defaultStream::error_stream(), "Exception "); 591 if (thread != NULL && thread->threadObj() != NULL) { 592 ResourceMark rm(THREAD); 593 jio_fprintf(defaultStream::error_stream(), 594 "in thread \"%s\" ", thread->name()); 595 } 596 if (ex->is_a(vmClasses::Throwable_klass())) { 597 JavaValue result(T_VOID); 598 JavaCalls::call_virtual(&result, 599 ex, 600 vmClasses::Throwable_klass(), 601 vmSymbols::printStackTrace_name(), 602 vmSymbols::void_method_signature(), 603 THREAD); 604 // If an exception is thrown in the call it gets thrown away. Not much 605 // we can do with it. The native code that calls this, does not check 606 // for the exception - hence, it might still be in the thread when DestroyVM gets 607 // called, potentially causing a few asserts to trigger - since no pending exception 608 // is expected. 609 CLEAR_PENDING_EXCEPTION; 610 } else { 611 ResourceMark rm(THREAD); 612 jio_fprintf(defaultStream::error_stream(), 613 ". Uncaught exception of type %s.", 614 ex->klass()->external_name()); 615 } 616 } 617 618 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 619 JNI_END 620 621 622 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env)) 623 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 624 625 // The jni code might be using this API to clear java thrown exception. 626 // So just mark jvmti thread exception state as exception caught. 627 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 628 if (state != NULL && state->is_exception_detected()) { 629 state->set_exception_caught(); 630 } 631 thread->clear_pending_exception(); 632 633 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 634 JNI_END 635 636 637 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 638 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 639 640 tty->print_cr("FATAL ERROR in native method: %s", msg); 641 thread->print_jni_stack(); 642 os::abort(); // Dump core and abort 643 JNI_END 644 645 646 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 647 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 648 649 //%note jni_11 650 if (capacity < 0 || 651 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 652 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 653 return JNI_ERR; 654 } 655 656 thread->push_jni_handle_block(); 657 jint ret = JNI_OK; 658 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 659 return ret; 660 JNI_END 661 662 663 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 664 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 665 666 //%note jni_11 667 Handle result_handle(thread, JNIHandles::resolve(result)); 668 JNIHandleBlock* old_handles = thread->active_handles(); 669 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 670 if (new_handles != NULL) { 671 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 672 // This way code will still work if PopLocalFrame is called without a corresponding 673 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 674 // the release_block call will release the blocks. 675 thread->set_active_handles(new_handles); 676 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 677 JNIHandleBlock::release_block(old_handles, thread); // may block 678 result = JNIHandles::make_local(thread, result_handle()); 679 } 680 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 681 return result; 682 JNI_END 683 684 685 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 686 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 687 688 Handle ref_handle(thread, JNIHandles::resolve(ref)); 689 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL); 690 691 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 692 return ret; 693 JNI_END 694 695 // Must be JNI_ENTRY (with HandleMark) 696 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 697 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 698 699 JNIHandles::destroy_global(ref); 700 701 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 702 JNI_END 703 704 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 705 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 706 707 JNIHandles::destroy_local(obj); 708 709 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 710 JNI_END 711 712 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 713 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 714 715 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 716 717 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 718 return ret; 719 JNI_END 720 721 722 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 723 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 724 725 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref), 726 AllocFailStrategy::RETURN_NULL); 727 728 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 729 return ret; 730 JNI_END 731 732 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 733 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 734 735 jint ret; 736 if (capacity >= 0 && 737 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 738 ret = JNI_OK; 739 } else { 740 ret = JNI_ERR; 741 } 742 743 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 744 return ret; 745 JNI_END 746 747 // Return the Handle Type 748 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 749 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 750 751 jobjectRefType ret = JNIInvalidRefType; 752 if (obj != NULL) { 753 ret = JNIHandles::handle_type(thread, obj); 754 } 755 756 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 757 return ret; 758 JNI_END 759 760 761 class JNI_ArgumentPusher : public SignatureIterator { 762 protected: 763 JavaCallArguments* _arguments; 764 765 void push_int(jint x) { _arguments->push_int(x); } 766 void push_long(jlong x) { _arguments->push_long(x); } 767 void push_float(jfloat x) { _arguments->push_float(x); } 768 void push_double(jdouble x) { _arguments->push_double(x); } 769 void push_object(jobject x) { _arguments->push_jobject(x); } 770 771 void push_boolean(jboolean b) { 772 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 773 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 774 // TemplateInterpreterGenerator::generate_result_handler_for and 775 // SharedRuntime::generate_native_wrapper. 776 push_int(b == 0 ? JNI_FALSE : JNI_TRUE); 777 } 778 779 JNI_ArgumentPusher(Method* method) 780 : SignatureIterator(method->signature(), 781 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint()) 782 { 783 _arguments = NULL; 784 } 785 786 public: 787 virtual void push_arguments_on(JavaCallArguments* arguments) = 0; 788 }; 789 790 791 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 792 va_list _ap; 793 794 void set_ap(va_list rap) { 795 va_copy(_ap, rap); 796 } 797 798 friend class SignatureIterator; // so do_parameters_on can call do_type 799 void do_type(BasicType type) { 800 switch (type) { 801 // these are coerced to int when using va_arg 802 case T_BYTE: 803 case T_CHAR: 804 case T_SHORT: 805 case T_INT: push_int(va_arg(_ap, jint)); break; 806 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break; 807 808 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 809 810 case T_LONG: push_long(va_arg(_ap, jlong)); break; 811 // float is coerced to double w/ va_arg 812 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break; 813 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break; 814 815 case T_ARRAY: 816 case T_OBJECT: 817 case T_PRIMITIVE_OBJECT: push_object(va_arg(_ap, jobject)); break; 818 default: ShouldNotReachHere(); 819 } 820 } 821 822 public: 823 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 824 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 825 set_ap(rap); 826 } 827 828 ~JNI_ArgumentPusherVaArg() { 829 va_end(_ap); 830 } 831 832 virtual void push_arguments_on(JavaCallArguments* arguments) { 833 _arguments = arguments; 834 do_parameters_on(this); 835 } 836 }; 837 838 839 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 840 protected: 841 const jvalue *_ap; 842 843 inline void set_ap(const jvalue *rap) { _ap = rap; } 844 845 friend class SignatureIterator; // so do_parameters_on can call do_type 846 void do_type(BasicType type) { 847 switch (type) { 848 case T_CHAR: push_int((_ap++)->c); break; 849 case T_SHORT: push_int((_ap++)->s); break; 850 case T_BYTE: push_int((_ap++)->b); break; 851 case T_INT: push_int((_ap++)->i); break; 852 case T_BOOLEAN: push_boolean((_ap++)->z); break; 853 case T_LONG: push_long((_ap++)->j); break; 854 case T_FLOAT: push_float((_ap++)->f); break; 855 case T_DOUBLE: push_double((_ap++)->d); break; 856 case T_ARRAY: 857 case T_OBJECT: 858 case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break; 859 default: ShouldNotReachHere(); 860 } 861 } 862 863 public: 864 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 865 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 866 set_ap(rap); 867 } 868 869 virtual void push_arguments_on(JavaCallArguments* arguments) { 870 _arguments = arguments; 871 do_parameters_on(this); 872 } 873 }; 874 875 876 enum JNICallType { 877 JNI_STATIC, 878 JNI_VIRTUAL, 879 JNI_NONVIRTUAL 880 }; 881 882 883 884 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 885 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 886 887 // Create object to hold arguments for the JavaCall, and associate it with 888 // the jni parser 889 ResourceMark rm(THREAD); 890 int number_of_parameters = method->size_of_parameters(); 891 JavaCallArguments java_args(number_of_parameters); 892 893 assert(method->is_static(), "method should be static"); 894 895 // Fill out JavaCallArguments object 896 args->push_arguments_on(&java_args); 897 // Initialize result type 898 result->set_type(args->return_type()); 899 900 // Invoke the method. Result is returned as oop. 901 JavaCalls::call(result, method, &java_args, CHECK); 902 903 // Convert result 904 if (is_reference_type(result->get_type())) { 905 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 906 } 907 } 908 909 910 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 911 oop recv = JNIHandles::resolve(receiver); 912 if (recv == NULL) { 913 THROW(vmSymbols::java_lang_NullPointerException()); 914 } 915 Handle h_recv(THREAD, recv); 916 917 int number_of_parameters; 918 Method* selected_method; 919 { 920 Method* m = Method::resolve_jmethod_id(method_id); 921 number_of_parameters = m->size_of_parameters(); 922 InstanceKlass* holder = m->method_holder(); 923 if (call_type != JNI_VIRTUAL) { 924 selected_method = m; 925 } else if (!m->has_itable_index()) { 926 // non-interface call -- for that little speed boost, don't handlize 927 debug_only(NoSafepointVerifier nosafepoint;) 928 // jni_GetMethodID makes sure class is linked and initialized 929 // so m should have a valid vtable index. 930 assert(m->valid_vtable_index(), "no valid vtable index"); 931 int vtbl_index = m->vtable_index(); 932 if (vtbl_index != Method::nonvirtual_vtable_index) { 933 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 934 } else { 935 // final method 936 selected_method = m; 937 } 938 } else { 939 // interface call 940 int itbl_index = m->itable_index(); 941 Klass* k = h_recv->klass(); 942 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 943 } 944 } 945 946 methodHandle method(THREAD, selected_method); 947 948 // Create object to hold arguments for the JavaCall, and associate it with 949 // the jni parser 950 ResourceMark rm(THREAD); 951 JavaCallArguments java_args(number_of_parameters); 952 953 // handle arguments 954 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 955 java_args.push_oop(h_recv); // Push jobject handle 956 957 // Fill out JavaCallArguments object 958 args->push_arguments_on(&java_args); 959 // Initialize result type 960 result->set_type(args->return_type()); 961 962 // Invoke the method. Result is returned as oop. 963 JavaCalls::call(result, method, &java_args, CHECK); 964 965 // Convert result 966 if (is_reference_type(result->get_type())) { 967 result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop())); 968 } 969 } 970 971 DT_RETURN_MARK_DECL(AllocObject, jobject 972 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 973 974 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 975 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 976 977 jobject ret = NULL; 978 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 979 980 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 981 ret = JNIHandles::make_local(THREAD, i); 982 return ret; 983 JNI_END 984 985 DT_RETURN_MARK_DECL(NewObjectA, jobject 986 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 987 988 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 989 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 990 991 jobject obj = NULL; 992 DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj); 993 994 oop clazzoop = JNIHandles::resolve_non_null(clazz); 995 Klass* k = java_lang_Class::as_Klass(clazzoop); 996 if (k == NULL) { 997 ResourceMark rm(THREAD); 998 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 999 } 1000 1001 if (!k->is_inline_klass()) { 1002 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1003 obj = JNIHandles::make_local(THREAD, i); 1004 JavaValue jvalue(T_VOID); 1005 JNI_ArgumentPusherArray ap(methodID, args); 1006 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1007 } else { 1008 JavaValue jvalue(T_PRIMITIVE_OBJECT); 1009 JNI_ArgumentPusherArray ap(methodID, args); 1010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL); 1011 obj = jvalue.get_jobject(); 1012 } 1013 return obj; 1014 JNI_END 1015 1016 1017 DT_RETURN_MARK_DECL(NewObjectV, jobject 1018 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1019 1020 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1021 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1022 1023 jobject obj = NULL; 1024 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1025 1026 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1027 Klass* k = java_lang_Class::as_Klass(clazzoop); 1028 if (k == NULL) { 1029 ResourceMark rm(THREAD); 1030 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1031 } 1032 1033 if (!k->is_inline_klass()) { 1034 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1035 obj = JNIHandles::make_local(THREAD, i); 1036 JavaValue jvalue(T_VOID); 1037 JNI_ArgumentPusherVaArg ap(methodID, args); 1038 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1039 } else { 1040 JavaValue jvalue(T_PRIMITIVE_OBJECT); 1041 JNI_ArgumentPusherVaArg ap(methodID, args); 1042 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL); 1043 obj = jvalue.get_jobject(); 1044 } 1045 return obj; 1046 JNI_END 1047 1048 1049 DT_RETURN_MARK_DECL(NewObject, jobject 1050 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1051 1052 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1053 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1054 1055 jobject obj = NULL; 1056 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1057 1058 oop clazzoop = JNIHandles::resolve_non_null(clazz); 1059 Klass* k = java_lang_Class::as_Klass(clazzoop); 1060 if (k == NULL) { 1061 ResourceMark rm(THREAD); 1062 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1063 } 1064 1065 if (!k->is_inline_klass()) { 1066 instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL); 1067 obj = JNIHandles::make_local(THREAD, i); 1068 va_list args; 1069 va_start(args, methodID); 1070 JavaValue jvalue(T_VOID); 1071 JNI_ArgumentPusherVaArg ap(methodID, args); 1072 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1073 va_end(args); 1074 } else { 1075 va_list args; 1076 va_start(args, methodID); 1077 JavaValue jvalue(T_PRIMITIVE_OBJECT); 1078 JNI_ArgumentPusherVaArg ap(methodID, args); 1079 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_NULL); 1080 va_end(args); 1081 obj = jvalue.get_jobject(); 1082 } 1083 return obj; 1084 JNI_END 1085 1086 1087 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1088 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1089 1090 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1091 jclass ret = 1092 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1093 1094 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1095 return ret; 1096 JNI_END 1097 1098 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1099 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1100 1101 jboolean ret = JNI_TRUE; 1102 if (obj != NULL) { 1103 ret = JNI_FALSE; 1104 Klass* k = java_lang_Class::as_Klass( 1105 JNIHandles::resolve_non_null(clazz)); 1106 if (k != NULL) { 1107 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1108 } 1109 } 1110 1111 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1112 return ret; 1113 JNI_END 1114 1115 1116 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1117 const char *sig, bool is_static, TRAPS) { 1118 // %%%% This code should probably just call into a method in the LinkResolver 1119 // 1120 // The class should have been loaded (we have an instance of the class 1121 // passed in) so the method and signature should already be in the symbol 1122 // table. If they're not there, the method doesn't exist. 1123 const char *name_to_probe = (name_str == NULL) 1124 ? vmSymbols::object_initializer_name()->as_C_string() 1125 : name_str; 1126 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1127 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1128 1129 if (name == NULL || signature == NULL) { 1130 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1131 } 1132 1133 oop mirror = JNIHandles::resolve_non_null(clazz); 1134 Klass* klass = java_lang_Class::as_Klass(mirror); 1135 1136 // Throw a NoSuchMethodError exception if we have an instance of a 1137 // primitive java.lang.Class 1138 if (java_lang_Class::is_primitive(mirror)) { 1139 ResourceMark rm(THREAD); 1140 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1141 } 1142 1143 // Make sure class is linked and initialized before handing id's out to 1144 // Method*s. 1145 klass->initialize(CHECK_NULL); 1146 1147 Method* m; 1148 if (name == vmSymbols::object_initializer_name() || 1149 name == vmSymbols::class_initializer_name()) { 1150 // Never search superclasses for constructors 1151 if (klass->is_instance_klass()) { 1152 m = InstanceKlass::cast(klass)->find_method(name, signature); 1153 } else { 1154 m = NULL; 1155 } 1156 } else { 1157 m = klass->lookup_method(name, signature); 1158 if (m == NULL && klass->is_instance_klass()) { 1159 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1160 } 1161 } 1162 if (m == NULL || (m->is_static() != is_static)) { 1163 ResourceMark rm(THREAD); 1164 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1165 } 1166 return m->jmethod_id(); 1167 } 1168 1169 1170 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1171 const char *name, const char *sig)) 1172 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1173 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1174 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1175 return ret; 1176 JNI_END 1177 1178 1179 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1180 const char *name, const char *sig)) 1181 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1182 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1183 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1184 return ret; 1185 JNI_END 1186 1187 1188 1189 // 1190 // Calling Methods 1191 // 1192 1193 1194 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1195 , EntryProbe, ReturnProbe) \ 1196 \ 1197 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1198 , ReturnProbe); \ 1199 \ 1200 JNI_ENTRY(ResultType, \ 1201 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1202 \ 1203 EntryProbe; \ 1204 ResultType ret = 0;\ 1205 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1206 (const ResultType&)ret);\ 1207 \ 1208 va_list args; \ 1209 va_start(args, methodID); \ 1210 JavaValue jvalue(Tag); \ 1211 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1212 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1213 va_end(args); \ 1214 ret = jvalue.get_##ResultType(); \ 1215 return ret;\ 1216 JNI_END 1217 1218 // the runtime type of subword integral basic types is integer 1219 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1220 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1221 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1222 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1223 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1224 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1225 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1226 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1227 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1228 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1229 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1230 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1231 1232 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1233 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1234 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1235 DEFINE_CALLMETHOD(jint, Int, T_INT, 1236 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1237 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1238 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1239 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1240 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1241 // Float and double probes don't return value because dtrace doesn't currently support it 1242 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1243 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1244 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1245 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1246 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1247 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1248 1249 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1250 , EntryProbe, ReturnProbe) \ 1251 \ 1252 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1253 , ReturnProbe); \ 1254 \ 1255 JNI_ENTRY(ResultType, \ 1256 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1257 \ 1258 EntryProbe;\ 1259 ResultType ret = 0;\ 1260 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1261 (const ResultType&)ret);\ 1262 \ 1263 JavaValue jvalue(Tag); \ 1264 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1266 ret = jvalue.get_##ResultType(); \ 1267 return ret;\ 1268 JNI_END 1269 1270 // the runtime type of subword integral basic types is integer 1271 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1272 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1273 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1274 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1275 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1276 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1277 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1278 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1279 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1280 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1281 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1282 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1283 1284 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1285 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1286 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1287 DEFINE_CALLMETHODV(jint, Int, T_INT, 1288 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1289 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1290 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1291 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1292 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1293 // Float and double probes don't return value because dtrace doesn't currently support it 1294 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1295 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1296 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1297 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1298 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1299 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1300 1301 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1302 , EntryProbe, ReturnProbe) \ 1303 \ 1304 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1305 , ReturnProbe); \ 1306 \ 1307 JNI_ENTRY(ResultType, \ 1308 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1309 EntryProbe; \ 1310 ResultType ret = 0;\ 1311 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1312 (const ResultType&)ret);\ 1313 \ 1314 JavaValue jvalue(Tag); \ 1315 JNI_ArgumentPusherArray ap(methodID, args); \ 1316 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1317 ret = jvalue.get_##ResultType(); \ 1318 return ret;\ 1319 JNI_END 1320 1321 // the runtime type of subword integral basic types is integer 1322 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1323 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1324 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1325 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1326 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1327 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1328 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1329 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1330 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1331 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1332 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1333 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1334 1335 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1336 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1337 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1338 DEFINE_CALLMETHODA(jint, Int, T_INT, 1339 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1340 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1341 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1342 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1343 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1344 // Float and double probes don't return value because dtrace doesn't currently support it 1345 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1346 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1347 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1348 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1349 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1350 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1351 1352 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1353 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1354 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1355 1356 1357 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1358 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1359 DT_VOID_RETURN_MARK(CallVoidMethod); 1360 1361 va_list args; 1362 va_start(args, methodID); 1363 JavaValue jvalue(T_VOID); 1364 JNI_ArgumentPusherVaArg ap(methodID, args); 1365 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1366 va_end(args); 1367 JNI_END 1368 1369 1370 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1371 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1372 DT_VOID_RETURN_MARK(CallVoidMethodV); 1373 1374 JavaValue jvalue(T_VOID); 1375 JNI_ArgumentPusherVaArg ap(methodID, args); 1376 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1377 JNI_END 1378 1379 1380 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1381 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1382 DT_VOID_RETURN_MARK(CallVoidMethodA); 1383 1384 JavaValue jvalue(T_VOID); 1385 JNI_ArgumentPusherArray ap(methodID, args); 1386 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1387 JNI_END 1388 1389 1390 1391 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1392 , EntryProbe, ReturnProbe) \ 1393 \ 1394 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1395 , ReturnProbe);\ 1396 \ 1397 JNI_ENTRY(ResultType, \ 1398 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1399 \ 1400 EntryProbe;\ 1401 ResultType ret;\ 1402 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1403 (const ResultType&)ret);\ 1404 \ 1405 va_list args; \ 1406 va_start(args, methodID); \ 1407 JavaValue jvalue(Tag); \ 1408 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1409 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1410 va_end(args); \ 1411 ret = jvalue.get_##ResultType(); \ 1412 return ret;\ 1413 JNI_END 1414 1415 // the runtime type of subword integral basic types is integer 1416 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1417 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1418 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1419 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1420 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1421 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1422 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1423 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1425 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1426 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1428 1429 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1430 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1431 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1432 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1433 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1434 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1435 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1436 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1437 // Float and double probes don't return value because dtrace doesn't currently support it 1438 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1439 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1440 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1441 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1442 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1443 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1444 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1445 1446 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1447 , EntryProbe, ReturnProbe) \ 1448 \ 1449 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1450 , ReturnProbe);\ 1451 \ 1452 JNI_ENTRY(ResultType, \ 1453 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1454 \ 1455 EntryProbe;\ 1456 ResultType ret;\ 1457 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1458 (const ResultType&)ret);\ 1459 \ 1460 JavaValue jvalue(Tag); \ 1461 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1462 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1463 ret = jvalue.get_##ResultType(); \ 1464 return ret;\ 1465 JNI_END 1466 1467 // the runtime type of subword integral basic types is integer 1468 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1469 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1470 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1471 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1472 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1473 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1474 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1475 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1477 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1478 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1480 1481 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1482 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1484 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1485 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1487 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1488 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1489 // Float and double probes don't return value because dtrace doesn't currently support it 1490 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1491 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1492 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1494 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1495 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1496 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1497 1498 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1499 , EntryProbe, ReturnProbe) \ 1500 \ 1501 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1502 , ReturnProbe);\ 1503 \ 1504 JNI_ENTRY(ResultType, \ 1505 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1506 \ 1507 EntryProbe;\ 1508 ResultType ret;\ 1509 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1510 (const ResultType&)ret);\ 1511 \ 1512 JavaValue jvalue(Tag); \ 1513 JNI_ArgumentPusherArray ap(methodID, args); \ 1514 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1515 ret = jvalue.get_##ResultType(); \ 1516 return ret;\ 1517 JNI_END 1518 1519 // the runtime type of subword integral basic types is integer 1520 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1521 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1522 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1523 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1524 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1525 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1526 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1527 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1529 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1530 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1531 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1532 1533 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1534 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1536 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1537 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1539 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1540 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1541 // Float and double probes don't return value because dtrace doesn't currently support it 1542 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1543 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1544 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1546 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1547 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1548 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1549 1550 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1551 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1552 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1553 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1554 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1555 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1556 1557 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1558 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1559 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1560 1561 va_list args; 1562 va_start(args, methodID); 1563 JavaValue jvalue(T_VOID); 1564 JNI_ArgumentPusherVaArg ap(methodID, args); 1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1566 va_end(args); 1567 JNI_END 1568 1569 1570 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1571 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1572 env, obj, cls, (uintptr_t) methodID); 1573 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1574 1575 JavaValue jvalue(T_VOID); 1576 JNI_ArgumentPusherVaArg ap(methodID, args); 1577 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1578 JNI_END 1579 1580 1581 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1582 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1583 env, obj, cls, (uintptr_t) methodID); 1584 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1585 JavaValue jvalue(T_VOID); 1586 JNI_ArgumentPusherArray ap(methodID, args); 1587 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1588 JNI_END 1589 1590 1591 1592 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1593 , EntryProbe, ResultProbe) \ 1594 \ 1595 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1596 , ResultProbe); \ 1597 \ 1598 JNI_ENTRY(ResultType, \ 1599 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1600 \ 1601 EntryProbe; \ 1602 ResultType ret = 0;\ 1603 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1604 (const ResultType&)ret);\ 1605 \ 1606 va_list args; \ 1607 va_start(args, methodID); \ 1608 JavaValue jvalue(Tag); \ 1609 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1610 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1611 va_end(args); \ 1612 ret = jvalue.get_##ResultType(); \ 1613 return ret;\ 1614 JNI_END 1615 1616 // the runtime type of subword integral basic types is integer 1617 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1618 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1619 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1620 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1621 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1622 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1623 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1624 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1625 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1626 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1627 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1628 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1629 1630 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1631 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1632 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1633 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1634 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1635 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1636 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1637 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1638 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1639 // Float and double probes don't return value because dtrace doesn't currently support it 1640 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1641 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1642 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1643 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1644 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1645 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1646 1647 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1648 , EntryProbe, ResultProbe) \ 1649 \ 1650 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1651 , ResultProbe); \ 1652 \ 1653 JNI_ENTRY(ResultType, \ 1654 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1655 \ 1656 EntryProbe; \ 1657 ResultType ret = 0;\ 1658 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1659 (const ResultType&)ret);\ 1660 \ 1661 JavaValue jvalue(Tag); \ 1662 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1663 /* Make sure class is initialized before trying to invoke its method */ \ 1664 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1665 k->initialize(CHECK_0); \ 1666 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1667 va_end(args); \ 1668 ret = jvalue.get_##ResultType(); \ 1669 return ret;\ 1670 JNI_END 1671 1672 // the runtime type of subword integral basic types is integer 1673 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1674 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1675 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1676 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1677 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1678 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1679 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1680 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1681 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1682 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1683 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1684 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1685 1686 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1687 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1689 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1690 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1691 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1692 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1693 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1694 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1695 // Float and double probes don't return value because dtrace doesn't currently support it 1696 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1697 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1698 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1699 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1700 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1701 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1702 1703 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1704 , EntryProbe, ResultProbe) \ 1705 \ 1706 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1707 , ResultProbe); \ 1708 \ 1709 JNI_ENTRY(ResultType, \ 1710 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1711 \ 1712 EntryProbe; \ 1713 ResultType ret = 0;\ 1714 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1715 (const ResultType&)ret);\ 1716 \ 1717 JavaValue jvalue(Tag); \ 1718 JNI_ArgumentPusherArray ap(methodID, args); \ 1719 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1720 ret = jvalue.get_##ResultType(); \ 1721 return ret;\ 1722 JNI_END 1723 1724 // the runtime type of subword integral basic types is integer 1725 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1726 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1727 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1728 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1729 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1730 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1731 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1732 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1734 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1735 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1737 1738 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1739 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1740 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1741 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1742 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1743 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1744 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1745 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1747 // Float and double probes don't return value because dtrace doesn't currently support it 1748 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1749 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1750 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1751 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1752 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1753 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1754 1755 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1756 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1757 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1758 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1759 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1760 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1761 1762 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1763 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1764 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1765 1766 va_list args; 1767 va_start(args, methodID); 1768 JavaValue jvalue(T_VOID); 1769 JNI_ArgumentPusherVaArg ap(methodID, args); 1770 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1771 va_end(args); 1772 JNI_END 1773 1774 1775 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1776 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1777 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1778 1779 JavaValue jvalue(T_VOID); 1780 JNI_ArgumentPusherVaArg ap(methodID, args); 1781 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1782 JNI_END 1783 1784 1785 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1786 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1787 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1788 1789 JavaValue jvalue(T_VOID); 1790 JNI_ArgumentPusherArray ap(methodID, args); 1791 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1792 JNI_END 1793 1794 1795 // 1796 // Accessing Fields 1797 // 1798 1799 1800 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1801 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1802 1803 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1804 const char *name, const char *sig)) 1805 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1806 jfieldID ret = 0; 1807 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1808 1809 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1810 1811 // The class should have been loaded (we have an instance of the class 1812 // passed in) so the field and signature should already be in the symbol 1813 // table. If they're not there, the field doesn't exist. 1814 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1815 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1816 if (fieldname == NULL || signame == NULL) { 1817 ResourceMark rm; 1818 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1819 } 1820 1821 // Make sure class is initialized before handing id's out to fields 1822 k->initialize(CHECK_NULL); 1823 1824 fieldDescriptor fd; 1825 if (!k->is_instance_klass() || 1826 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1827 ResourceMark rm; 1828 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1829 } 1830 1831 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1832 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1833 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_inlined()); 1834 return ret; 1835 JNI_END 1836 1837 1838 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1839 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1840 oop o = JNIHandles::resolve_non_null(obj); 1841 Klass* k = o->klass(); 1842 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1843 oop res = NULL; 1844 // Keep JVMTI addition small and only check enabled flag here. 1845 // jni_GetField_probe() assumes that is okay to create handles. 1846 if (JvmtiExport::should_post_field_access()) { 1847 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1848 } 1849 if (!jfieldIDWorkaround::is_inlined_jfieldID(fieldID)) { 1850 res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1851 } else { 1852 assert(k->is_instance_klass(), "Only instance can have inlined fields"); 1853 InstanceKlass* ik = InstanceKlass::cast(k); 1854 fieldDescriptor fd; 1855 ik->find_field_from_offset(offset, false, &fd); // performance bottleneck 1856 InstanceKlass* holder = fd.field_holder(); 1857 InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1858 res = field_vklass->read_inlined_field(o, ik->field_offset(fd.index()), CHECK_NULL); 1859 } 1860 jobject ret = JNIHandles::make_local(THREAD, res); 1861 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1862 return ret; 1863 JNI_END 1864 1865 1866 1867 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1868 , EntryProbe, ReturnProbe) \ 1869 \ 1870 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1871 , ReturnProbe); \ 1872 \ 1873 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1874 \ 1875 EntryProbe; \ 1876 Return ret = 0;\ 1877 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1878 \ 1879 oop o = JNIHandles::resolve_non_null(obj); \ 1880 Klass* k = o->klass(); \ 1881 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1882 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1883 if (JvmtiExport::should_post_field_access()) { \ 1884 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \ 1885 } \ 1886 ret = o->Fieldname##_field(offset); \ 1887 return ret; \ 1888 JNI_END 1889 1890 DEFINE_GETFIELD(jboolean, bool, Boolean 1891 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1892 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1893 DEFINE_GETFIELD(jbyte, byte, Byte 1894 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1895 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1896 DEFINE_GETFIELD(jchar, char, Char 1897 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1898 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1899 DEFINE_GETFIELD(jshort, short, Short 1900 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1901 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1902 DEFINE_GETFIELD(jint, int, Int 1903 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1904 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1905 DEFINE_GETFIELD(jlong, long, Long 1906 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1907 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1908 // Float and double probes don't return value because dtrace doesn't currently support it 1909 DEFINE_GETFIELD(jfloat, float, Float 1910 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1911 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1912 DEFINE_GETFIELD(jdouble, double, Double 1913 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1914 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1915 1916 address jni_GetBooleanField_addr() { 1917 return (address)jni_GetBooleanField; 1918 } 1919 address jni_GetByteField_addr() { 1920 return (address)jni_GetByteField; 1921 } 1922 address jni_GetCharField_addr() { 1923 return (address)jni_GetCharField; 1924 } 1925 address jni_GetShortField_addr() { 1926 return (address)jni_GetShortField; 1927 } 1928 address jni_GetIntField_addr() { 1929 return (address)jni_GetIntField; 1930 } 1931 address jni_GetLongField_addr() { 1932 return (address)jni_GetLongField; 1933 } 1934 address jni_GetFloatField_addr() { 1935 return (address)jni_GetFloatField; 1936 } 1937 address jni_GetDoubleField_addr() { 1938 return (address)jni_GetDoubleField; 1939 } 1940 1941 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1942 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 1943 oop o = JNIHandles::resolve_non_null(obj); 1944 Klass* k = o->klass(); 1945 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1946 // Keep JVMTI addition small and only check enabled flag here. 1947 if (JvmtiExport::should_post_field_modification()) { 1948 jvalue field_value; 1949 field_value.l = value; 1950 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 1951 } 1952 if (!jfieldIDWorkaround::is_inlined_jfieldID(fieldID)) { 1953 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 1954 } else { 1955 assert(k->is_instance_klass(), "Only instances can have inlined fields"); 1956 InstanceKlass* ik = InstanceKlass::cast(k); 1957 fieldDescriptor fd; 1958 ik->find_field_from_offset(offset, false, &fd); 1959 InstanceKlass* holder = fd.field_holder(); 1960 InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index())); 1961 oop v = JNIHandles::resolve_non_null(value); 1962 vklass->write_inlined_field(o, offset, v, CHECK); 1963 } 1964 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 1965 JNI_END 1966 1967 1968 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 1969 , EntryProbe, ReturnProbe) \ 1970 \ 1971 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 1972 \ 1973 EntryProbe; \ 1974 \ 1975 oop o = JNIHandles::resolve_non_null(obj); \ 1976 Klass* k = o->klass(); \ 1977 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1978 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1979 if (JvmtiExport::should_post_field_modification()) { \ 1980 jvalue field_value; \ 1981 field_value.unionType = value; \ 1982 o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 1983 } \ 1984 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 1985 o->Fieldname##_field_put(offset, value); \ 1986 ReturnProbe; \ 1987 JNI_END 1988 1989 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 1990 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1991 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 1992 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 1993 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1994 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 1995 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 1996 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 1997 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 1998 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 1999 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2000 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2001 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2002 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2003 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2004 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2005 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2006 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2007 // Float and double probes don't return value because dtrace doesn't currently support it 2008 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2009 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2010 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2011 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2012 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2013 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2014 2015 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2016 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2017 2018 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2019 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2020 jobject ret = NULL; 2021 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2022 2023 fieldDescriptor fd; 2024 bool found = false; 2025 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2026 2027 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2028 2029 if (isStatic) { 2030 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2031 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2032 assert(id->is_static_field_id(), "invalid static field id"); 2033 found = id->find_local_field(&fd); 2034 } else { 2035 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2036 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2037 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2038 } 2039 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2040 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2041 ret = JNIHandles::make_local(THREAD, reflected); 2042 return ret; 2043 JNI_END 2044 2045 2046 // 2047 // Accessing Static Fields 2048 // 2049 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2050 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2051 2052 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2053 const char *name, const char *sig)) 2054 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2055 jfieldID ret = NULL; 2056 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2057 2058 // The class should have been loaded (we have an instance of the class 2059 // passed in) so the field and signature should already be in the symbol 2060 // table. If they're not there, the field doesn't exist. 2061 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2062 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2063 if (fieldname == NULL || signame == NULL) { 2064 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2065 } 2066 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2067 // Make sure class is initialized before handing id's out to static fields 2068 k->initialize(CHECK_NULL); 2069 2070 fieldDescriptor fd; 2071 if (!k->is_instance_klass() || 2072 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2073 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2074 } 2075 2076 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2077 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2078 debug_only(id->set_is_static_field_id();) 2079 2080 debug_only(id->verify(fd.field_holder())); 2081 2082 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2083 return ret; 2084 JNI_END 2085 2086 2087 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2088 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2089 #if INCLUDE_JNI_CHECK 2090 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2091 #endif // INCLUDE_JNI_CHECK 2092 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2093 assert(id->is_static_field_id(), "invalid static field id"); 2094 // Keep JVMTI addition small and only check enabled flag here. 2095 // jni_GetField_probe() assumes that is okay to create handles. 2096 if (JvmtiExport::should_post_field_access()) { 2097 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2098 } 2099 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2100 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2101 return ret; 2102 JNI_END 2103 2104 2105 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2106 , EntryProbe, ReturnProbe) \ 2107 \ 2108 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2109 , ReturnProbe); \ 2110 \ 2111 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2112 EntryProbe; \ 2113 Return ret = 0;\ 2114 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2115 (const Return&)ret);\ 2116 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2117 assert(id->is_static_field_id(), "invalid static field id"); \ 2118 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2119 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2120 if (JvmtiExport::should_post_field_access()) { \ 2121 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2122 } \ 2123 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2124 return ret;\ 2125 JNI_END 2126 2127 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2128 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2129 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2130 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2131 DEFINE_GETSTATICFIELD(jchar, char, Char 2132 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2133 DEFINE_GETSTATICFIELD(jshort, short, Short 2134 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2135 DEFINE_GETSTATICFIELD(jint, int, Int 2136 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2137 DEFINE_GETSTATICFIELD(jlong, long, Long 2138 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2139 // Float and double probes don't return value because dtrace doesn't currently support it 2140 DEFINE_GETSTATICFIELD(jfloat, float, Float 2141 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2142 DEFINE_GETSTATICFIELD(jdouble, double, Double 2143 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2144 2145 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2146 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2147 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2148 assert(id->is_static_field_id(), "invalid static field id"); 2149 // Keep JVMTI addition small and only check enabled flag here. 2150 // jni_SetField_probe() assumes that is okay to create handles. 2151 if (JvmtiExport::should_post_field_modification()) { 2152 jvalue field_value; 2153 field_value.l = value; 2154 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2155 } 2156 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2157 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2158 JNI_END 2159 2160 2161 2162 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2163 , EntryProbe, ReturnProbe) \ 2164 \ 2165 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2166 EntryProbe; \ 2167 \ 2168 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2169 assert(id->is_static_field_id(), "invalid static field id"); \ 2170 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2171 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2172 if (JvmtiExport::should_post_field_modification()) { \ 2173 jvalue field_value; \ 2174 field_value.unionType = value; \ 2175 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2176 } \ 2177 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 2178 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2179 ReturnProbe;\ 2180 JNI_END 2181 2182 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2183 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2184 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2185 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2186 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2187 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2188 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2189 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2190 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2191 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2192 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2193 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2194 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2195 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2196 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2197 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2198 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2199 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2200 // Float and double probes don't return value because dtrace doesn't currently support it 2201 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2202 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2203 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2204 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2205 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2206 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2207 2208 // 2209 // String Operations 2210 // 2211 2212 // Unicode Interface 2213 2214 DT_RETURN_MARK_DECL(NewString, jstring 2215 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2216 2217 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2218 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2219 jstring ret = NULL; 2220 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2221 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2222 ret = (jstring) JNIHandles::make_local(THREAD, string); 2223 return ret; 2224 JNI_END 2225 2226 2227 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2228 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2229 jsize ret = 0; 2230 oop s = JNIHandles::resolve_non_null(string); 2231 ret = java_lang_String::length(s); 2232 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2233 return ret; 2234 JNI_END 2235 2236 2237 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2238 JNIEnv *env, jstring string, jboolean *isCopy)) 2239 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2240 jchar* buf = NULL; 2241 oop s = JNIHandles::resolve_non_null(string); 2242 typeArrayOop s_value = java_lang_String::value(s); 2243 if (s_value != NULL) { 2244 int s_len = java_lang_String::length(s, s_value); 2245 bool is_latin1 = java_lang_String::is_latin1(s); 2246 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2247 /* JNI Specification states return NULL on OOM */ 2248 if (buf != NULL) { 2249 if (s_len > 0) { 2250 if (!is_latin1) { 2251 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2252 buf, s_len); 2253 } else { 2254 for (int i = 0; i < s_len; i++) { 2255 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2256 } 2257 } 2258 } 2259 buf[s_len] = 0; 2260 //%note jni_5 2261 if (isCopy != NULL) { 2262 *isCopy = JNI_TRUE; 2263 } 2264 } 2265 } 2266 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2267 return buf; 2268 JNI_END 2269 2270 2271 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2272 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2273 //%note jni_6 2274 if (chars != NULL) { 2275 // Since String objects are supposed to be immutable, don't copy any 2276 // new data back. A bad user will have to go after the char array. 2277 FreeHeap((void*) chars); 2278 } 2279 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2280 JNI_END 2281 2282 2283 // UTF Interface 2284 2285 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2286 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2287 2288 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2289 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2290 jstring ret; 2291 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2292 2293 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2294 ret = (jstring) JNIHandles::make_local(THREAD, result); 2295 return ret; 2296 JNI_END 2297 2298 2299 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2300 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2301 oop java_string = JNIHandles::resolve_non_null(string); 2302 jsize ret = java_lang_String::utf8_length(java_string); 2303 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2304 return ret; 2305 JNI_END 2306 2307 2308 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2309 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2310 char* result = NULL; 2311 oop java_string = JNIHandles::resolve_non_null(string); 2312 typeArrayOop s_value = java_lang_String::value(java_string); 2313 if (s_value != NULL) { 2314 size_t length = java_lang_String::utf8_length(java_string, s_value); 2315 /* JNI Specification states return NULL on OOM */ 2316 result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL); 2317 if (result != NULL) { 2318 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2319 if (isCopy != NULL) { 2320 *isCopy = JNI_TRUE; 2321 } 2322 } 2323 } 2324 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2325 return result; 2326 JNI_END 2327 2328 2329 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2330 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2331 if (chars != NULL) { 2332 FreeHeap((char*) chars); 2333 } 2334 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2335 JNI_END 2336 2337 2338 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2339 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2340 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2341 assert(a->is_array(), "must be array"); 2342 jsize ret = a->length(); 2343 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2344 return ret; 2345 JNI_END 2346 2347 2348 // 2349 // Object Array Operations 2350 // 2351 2352 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2353 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2354 2355 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2356 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2357 jobjectArray ret = NULL; 2358 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2359 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2360 Klass* ak = ek->array_klass(CHECK_NULL); 2361 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2362 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2363 oop initial_value = JNIHandles::resolve(initialElement); 2364 if (initial_value != NULL) { // array already initialized with NULL 2365 for (int index = 0; index < length; index++) { 2366 result->obj_at_put(index, initial_value); 2367 } 2368 } 2369 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2370 return ret; 2371 JNI_END 2372 2373 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2374 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2375 2376 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2377 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2378 jobject ret = NULL; 2379 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2380 oop res = NULL; 2381 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2382 if (arr->is_within_bounds(index)) { 2383 if (arr->is_flatArray()) { 2384 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2385 flatArrayHandle vah(thread, a); 2386 res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL); 2387 assert(res != NULL, "Must be set in one of two paths above"); 2388 } else { 2389 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2390 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2391 res = a->obj_at(index); 2392 } 2393 } else { 2394 ResourceMark rm(THREAD); 2395 stringStream ss; 2396 ss.print("Index %d out of bounds for length %d", index,arr->length()); 2397 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2398 } 2399 ret = JNIHandles::make_local(THREAD, res); 2400 return ret; 2401 JNI_END 2402 2403 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2404 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2405 2406 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2407 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2408 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2409 2410 bool oob = false; 2411 int length = -1; 2412 oop res = NULL; 2413 arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array)); 2414 if (arr->is_within_bounds(index)) { 2415 if (arr->is_flatArray()) { 2416 flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array)); 2417 oop v = JNIHandles::resolve(value); 2418 FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass()); 2419 InlineKlass* element_vklass = vaklass->element_klass(); 2420 if (v != NULL && v->is_a(element_vklass)) { 2421 a->value_copy_to_index(v, index); 2422 } else { 2423 ResourceMark rm(THREAD); 2424 stringStream ss; 2425 Klass *kl = FlatArrayKlass::cast(a->klass()); 2426 ss.print("type mismatch: can not store %s to %s[%d]", 2427 v->klass()->external_name(), 2428 kl->external_name(), 2429 index); 2430 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2431 ss.print("[]"); 2432 } 2433 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2434 } 2435 } else { 2436 assert(arr->is_objArray(), "If not a valueArray. must be an objArray"); 2437 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2438 oop v = JNIHandles::resolve(value); 2439 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2440 a->obj_at_put(index, v); 2441 } else { 2442 ResourceMark rm(THREAD); 2443 stringStream ss; 2444 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2445 ss.print("type mismatch: can not store %s to %s[%d]", 2446 v->klass()->external_name(), 2447 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2448 index); 2449 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2450 ss.print("[]"); 2451 } 2452 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2453 } 2454 } 2455 } else { 2456 ResourceMark rm(THREAD); 2457 stringStream ss; 2458 ss.print("Index %d out of bounds for length %d", index, arr->length()); 2459 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2460 } 2461 JNI_END 2462 2463 2464 2465 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2466 ,EntryProbe,ReturnProbe) \ 2467 \ 2468 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2469 , ReturnProbe); \ 2470 \ 2471 JNI_ENTRY(Return, \ 2472 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2473 EntryProbe; \ 2474 Return ret = NULL;\ 2475 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2476 \ 2477 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2478 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2479 return ret;\ 2480 JNI_END 2481 2482 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2483 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2484 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2485 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2486 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2487 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2488 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2489 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2490 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2491 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2492 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2493 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2494 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2495 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2496 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2497 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2498 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2499 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2500 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2501 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2502 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2503 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2504 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2505 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2506 2507 // Return an address which will fault if the caller writes to it. 2508 2509 static char* get_bad_address() { 2510 static char* bad_address = NULL; 2511 if (bad_address == NULL) { 2512 size_t size = os::vm_allocation_granularity(); 2513 bad_address = os::reserve_memory(size); 2514 if (bad_address != NULL) { 2515 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2516 /*is_committed*/false); 2517 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2518 } 2519 } 2520 return bad_address; 2521 } 2522 2523 2524 2525 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2526 , EntryProbe, ReturnProbe) \ 2527 \ 2528 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2529 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2530 EntryProbe; \ 2531 /* allocate an chunk of memory in c land */ \ 2532 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2533 ElementType* result; \ 2534 int len = a->length(); \ 2535 if (len == 0) { \ 2536 if (isCopy != NULL) { \ 2537 *isCopy = JNI_FALSE; \ 2538 } \ 2539 /* Empty array: legal but useless, can't return NULL. \ 2540 * Return a pointer to something useless. \ 2541 * Avoid asserts in typeArrayOop. */ \ 2542 result = (ElementType*)get_bad_address(); \ 2543 } else { \ 2544 /* JNI Specification states return NULL on OOM */ \ 2545 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2546 if (result != NULL) { \ 2547 /* copy the array to the c chunk */ \ 2548 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2549 result, len); \ 2550 if (isCopy) { \ 2551 *isCopy = JNI_TRUE; \ 2552 } \ 2553 } \ 2554 } \ 2555 ReturnProbe; \ 2556 return result; \ 2557 JNI_END 2558 2559 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2560 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2561 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2562 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2563 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2564 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2565 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2566 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2567 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2568 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2569 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2570 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2571 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2572 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2573 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2574 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2575 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2576 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2577 // Float and double probes don't return value because dtrace doesn't currently support it 2578 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2579 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2580 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2581 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2582 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2583 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2584 2585 2586 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2587 , EntryProbe, ReturnProbe);\ 2588 \ 2589 JNI_ENTRY_NO_PRESERVE(void, \ 2590 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2591 ElementType *buf, jint mode)) \ 2592 EntryProbe; \ 2593 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2594 int len = a->length(); \ 2595 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2596 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2597 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2598 } \ 2599 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2600 FreeHeap(buf); \ 2601 } \ 2602 } \ 2603 ReturnProbe; \ 2604 JNI_END 2605 2606 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2607 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2608 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2609 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2610 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2611 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2612 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2613 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2614 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2615 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2616 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2617 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2618 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2619 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2620 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2621 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2622 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2623 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2624 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2625 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2626 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2627 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2628 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2629 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2630 2631 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2632 ResourceMark rm(THREAD); 2633 if (copy_len < 0) { 2634 stringStream ss; 2635 ss.print("Length %d is negative", copy_len); 2636 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2637 } else if (start < 0 || (start > array_len - copy_len)) { 2638 stringStream ss; 2639 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2640 start, (int64_t)start+(int64_t)copy_len, array_len); 2641 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2642 } 2643 } 2644 2645 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2646 , EntryProbe, ReturnProbe); \ 2647 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2648 , ReturnProbe); \ 2649 \ 2650 JNI_ENTRY(void, \ 2651 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2652 jsize len, ElementType *buf)) \ 2653 EntryProbe; \ 2654 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2655 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2656 check_bounds(start, len, src->length(), CHECK); \ 2657 if (len > 0) { \ 2658 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2659 } \ 2660 JNI_END 2661 2662 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2663 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2664 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2665 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2666 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2667 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2668 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2669 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2670 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2671 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2672 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2673 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2674 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2675 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2676 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2677 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2678 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2679 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2680 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2681 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2682 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2683 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2684 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2685 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2686 2687 2688 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2689 , EntryProbe, ReturnProbe); \ 2690 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2691 ,ReturnProbe); \ 2692 \ 2693 JNI_ENTRY(void, \ 2694 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2695 jsize len, const ElementType *buf)) \ 2696 EntryProbe; \ 2697 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2698 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2699 check_bounds(start, len, dst->length(), CHECK); \ 2700 if (len > 0) { \ 2701 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2702 } \ 2703 JNI_END 2704 2705 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2706 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2707 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2708 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2709 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2710 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2711 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2712 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2713 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2714 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2715 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2716 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2717 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2718 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2719 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2720 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2721 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2722 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2723 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2724 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2725 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2726 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2727 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2728 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2729 2730 2731 DT_RETURN_MARK_DECL(RegisterNatives, jint 2732 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2733 2734 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2735 const JNINativeMethod *methods, 2736 jint nMethods)) 2737 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2738 jint ret = 0; 2739 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2740 2741 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2742 2743 // There are no restrictions on native code registering native methods, 2744 // which allows agents to redefine the bindings to native methods, however 2745 // we issue a warning if any code running outside of the boot/platform 2746 // loader is rebinding any native methods in classes loaded by the 2747 // boot/platform loader that are in named modules. That will catch changes 2748 // to platform classes while excluding classes added to the bootclasspath. 2749 bool do_warning = false; 2750 2751 // Only instanceKlasses can have native methods 2752 if (k->is_instance_klass()) { 2753 oop cl = k->class_loader(); 2754 InstanceKlass* ik = InstanceKlass::cast(k); 2755 // Check for a platform class 2756 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) && 2757 ik->module()->is_named()) { 2758 Klass* caller = thread->security_get_caller_class(1); 2759 // If no caller class, or caller class has a different loader, then 2760 // issue a warning below. 2761 do_warning = (caller == NULL) || caller->class_loader() != cl; 2762 } 2763 } 2764 2765 2766 for (int index = 0; index < nMethods; index++) { 2767 const char* meth_name = methods[index].name; 2768 const char* meth_sig = methods[index].signature; 2769 int meth_name_len = (int)strlen(meth_name); 2770 2771 // The class should have been loaded (we have an instance of the class 2772 // passed in) so the method and signature should already be in the symbol 2773 // table. If they're not there, the method doesn't exist. 2774 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2775 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2776 2777 if (name == NULL || signature == NULL) { 2778 ResourceMark rm(THREAD); 2779 stringStream st; 2780 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2781 // Must return negative value on failure 2782 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2783 } 2784 2785 if (do_warning) { 2786 ResourceMark rm(THREAD); 2787 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2788 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2789 } 2790 2791 bool res = Method::register_native(k, name, signature, 2792 (address) methods[index].fnPtr, THREAD); 2793 if (!res) { 2794 ret = -1; 2795 break; 2796 } 2797 } 2798 return ret; 2799 JNI_END 2800 2801 2802 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2803 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2804 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2805 //%note jni_2 2806 if (k->is_instance_klass()) { 2807 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2808 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2809 if (m->is_native()) { 2810 m->clear_native_function(); 2811 m->set_signature_handler(NULL); 2812 } 2813 } 2814 } 2815 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2816 return 0; 2817 JNI_END 2818 2819 // 2820 // Monitor functions 2821 // 2822 2823 DT_RETURN_MARK_DECL(MonitorEnter, jint 2824 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2825 2826 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2827 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2828 jint ret = JNI_ERR; 2829 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2830 2831 // If the object is null, we can't do anything with it 2832 if (jobj == NULL) { 2833 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2834 } 2835 2836 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2837 ObjectSynchronizer::jni_enter(obj, thread); 2838 return JNI_OK; 2839 JNI_END 2840 2841 DT_RETURN_MARK_DECL(MonitorExit, jint 2842 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2843 2844 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2845 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2846 jint ret = JNI_ERR; 2847 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2848 2849 // Don't do anything with a null object 2850 if (jobj == NULL) { 2851 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2852 } 2853 2854 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2855 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2856 return JNI_OK; 2857 JNI_END 2858 2859 // 2860 // Extensions 2861 // 2862 2863 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2864 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2865 2866 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2867 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2868 DT_VOID_RETURN_MARK(GetStringRegion); 2869 oop s = JNIHandles::resolve_non_null(string); 2870 typeArrayOop s_value = java_lang_String::value(s); 2871 int s_len = java_lang_String::length(s, s_value); 2872 if (start < 0 || len < 0 || start > s_len - len) { 2873 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2874 } else { 2875 if (len > 0) { 2876 bool is_latin1 = java_lang_String::is_latin1(s); 2877 if (!is_latin1) { 2878 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2879 buf, len); 2880 } else { 2881 for (int i = 0; i < len; i++) { 2882 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2883 } 2884 } 2885 } 2886 } 2887 JNI_END 2888 2889 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2890 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2891 2892 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2893 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2894 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2895 oop s = JNIHandles::resolve_non_null(string); 2896 typeArrayOop s_value = java_lang_String::value(s); 2897 int s_len = java_lang_String::length(s, s_value); 2898 if (start < 0 || len < 0 || start > s_len - len) { 2899 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2900 } else { 2901 //%note jni_7 2902 if (len > 0) { 2903 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2904 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2905 // as_utf8_string null-terminates the result string 2906 } else { 2907 // JDK null-terminates the buffer even in len is zero 2908 if (buf != NULL) { 2909 buf[0] = 0; 2910 } 2911 } 2912 } 2913 JNI_END 2914 2915 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 2916 if (Universe::heap()->supports_object_pinning()) { 2917 const oop o = JNIHandles::resolve_non_null(obj); 2918 return Universe::heap()->pin_object(thread, o); 2919 } else { 2920 GCLocker::lock_critical(thread); 2921 return JNIHandles::resolve_non_null(obj); 2922 } 2923 } 2924 2925 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 2926 if (Universe::heap()->supports_object_pinning()) { 2927 const oop o = JNIHandles::resolve_non_null(obj); 2928 return Universe::heap()->unpin_object(thread, o); 2929 } else { 2930 GCLocker::unlock_critical(thread); 2931 } 2932 } 2933 2934 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2935 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2936 if (isCopy != NULL) { 2937 *isCopy = JNI_FALSE; 2938 } 2939 oop a = lock_gc_or_pin_object(thread, array); 2940 assert(a->is_typeArray(), "Primitive array only"); 2941 BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); 2942 void* ret = arrayOop(a)->base(type); 2943 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2944 return ret; 2945 JNI_END 2946 2947 2948 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2949 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 2950 unlock_gc_or_unpin_object(thread, array); 2951 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 2952 JNI_END 2953 2954 2955 static typeArrayOop lock_gc_or_pin_string_value(JavaThread* thread, oop str) { 2956 if (Universe::heap()->supports_object_pinning()) { 2957 // Forbid deduplication before obtaining the value array, to prevent 2958 // deduplication from replacing the value array while setting up or in 2959 // the critical section. That would lead to the release operation 2960 // unpinning the wrong object. 2961 if (StringDedup::is_enabled()) { 2962 NoSafepointVerifier nsv; 2963 StringDedup::forbid_deduplication(str); 2964 } 2965 typeArrayOop s_value = java_lang_String::value(str); 2966 return (typeArrayOop) Universe::heap()->pin_object(thread, s_value); 2967 } else { 2968 Handle h(thread, str); // Handlize across potential safepoint. 2969 GCLocker::lock_critical(thread); 2970 return java_lang_String::value(h()); 2971 } 2972 } 2973 2974 static void unlock_gc_or_unpin_string_value(JavaThread* thread, oop str) { 2975 if (Universe::heap()->supports_object_pinning()) { 2976 typeArrayOop s_value = java_lang_String::value(str); 2977 Universe::heap()->unpin_object(thread, s_value); 2978 } else { 2979 GCLocker::unlock_critical(thread); 2980 } 2981 } 2982 2983 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 2984 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 2985 oop s = JNIHandles::resolve_non_null(string); 2986 jchar* ret; 2987 if (!java_lang_String::is_latin1(s)) { 2988 typeArrayOop s_value = lock_gc_or_pin_string_value(thread, s); 2989 ret = (jchar*) s_value->base(T_CHAR); 2990 if (isCopy != NULL) *isCopy = JNI_FALSE; 2991 } else { 2992 // Inflate latin1 encoded string to UTF16 2993 typeArrayOop s_value = java_lang_String::value(s); 2994 int s_len = java_lang_String::length(s, s_value); 2995 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2996 /* JNI Specification states return NULL on OOM */ 2997 if (ret != NULL) { 2998 for (int i = 0; i < s_len; i++) { 2999 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3000 } 3001 ret[s_len] = 0; 3002 } 3003 if (isCopy != NULL) *isCopy = JNI_TRUE; 3004 } 3005 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3006 return ret; 3007 JNI_END 3008 3009 3010 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3011 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3012 oop s = JNIHandles::resolve_non_null(str); 3013 bool is_latin1 = java_lang_String::is_latin1(s); 3014 if (is_latin1) { 3015 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3016 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3017 FREE_C_HEAP_ARRAY(jchar, chars); 3018 } else { 3019 // For non-latin1 string, drop the associated gc-locker/pin. 3020 unlock_gc_or_unpin_string_value(thread, s); 3021 } 3022 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3023 JNI_END 3024 3025 3026 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3027 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3028 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3029 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 3030 if (ret == NULL) { 3031 THROW_OOP_(Universe::out_of_memory_error_c_heap(), NULL); 3032 } 3033 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3034 return ret; 3035 JNI_END 3036 3037 // Must be JNI_ENTRY (with HandleMark) 3038 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3039 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3040 JNIHandles::destroy_weak_global(ref); 3041 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3042 JNI_END 3043 3044 3045 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3046 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3047 jni_check_async_exceptions(thread); 3048 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3049 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3050 return ret; 3051 JNI_END 3052 3053 3054 // Initialization state for three routines below relating to 3055 // java.nio.DirectBuffers 3056 static int directBufferSupportInitializeStarted = 0; 3057 static volatile int directBufferSupportInitializeEnded = 0; 3058 static volatile int directBufferSupportInitializeFailed = 0; 3059 static jclass bufferClass = NULL; 3060 static jclass directBufferClass = NULL; 3061 static jclass directByteBufferClass = NULL; 3062 static jmethodID directByteBufferConstructor = NULL; 3063 static jfieldID directBufferAddressField = NULL; 3064 static jfieldID bufferCapacityField = NULL; 3065 3066 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3067 Handle loader; // null (bootstrap) loader 3068 Handle protection_domain; // null protection domain 3069 3070 TempNewSymbol sym = SymbolTable::new_symbol(name); 3071 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3072 3073 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3074 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3075 } 3076 return result; 3077 } 3078 3079 // These lookups are done with the NULL (bootstrap) ClassLoader to 3080 // circumvent any security checks that would be done by jni_FindClass. 3081 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3082 { 3083 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3084 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3085 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3086 return true; 3087 } 3088 JNI_END 3089 3090 3091 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3092 if (directBufferSupportInitializeFailed) { 3093 return false; 3094 } 3095 3096 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 3097 if (!lookupDirectBufferClasses(env)) { 3098 directBufferSupportInitializeFailed = 1; 3099 return false; 3100 } 3101 3102 // Make global references for these 3103 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3104 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3105 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3106 3107 // Global refs will be NULL if out-of-memory (no exception is pending) 3108 if (bufferClass == NULL || directBufferClass == NULL || directByteBufferClass == NULL) { 3109 directBufferSupportInitializeFailed = 1; 3110 return false; 3111 } 3112 3113 // Get needed field and method IDs 3114 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3115 if (env->ExceptionCheck()) { 3116 env->ExceptionClear(); 3117 directBufferSupportInitializeFailed = 1; 3118 return false; 3119 } 3120 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3121 if (env->ExceptionCheck()) { 3122 env->ExceptionClear(); 3123 directBufferSupportInitializeFailed = 1; 3124 return false; 3125 } 3126 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3127 if (env->ExceptionCheck()) { 3128 env->ExceptionClear(); 3129 directBufferSupportInitializeFailed = 1; 3130 return false; 3131 } 3132 3133 if ((directByteBufferConstructor == NULL) || 3134 (directBufferAddressField == NULL) || 3135 (bufferCapacityField == NULL)) { 3136 directBufferSupportInitializeFailed = 1; 3137 return false; 3138 } 3139 3140 directBufferSupportInitializeEnded = 1; 3141 } else { 3142 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3143 os::naked_yield(); 3144 } 3145 } 3146 3147 return !directBufferSupportInitializeFailed; 3148 } 3149 3150 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3151 { 3152 // thread_from_jni_environment() will block if VM is gone. 3153 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3154 3155 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3156 3157 if (!directBufferSupportInitializeEnded) { 3158 if (!initializeDirectBufferSupport(env, thread)) { 3159 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3160 return NULL; 3161 } 3162 } 3163 3164 // Being paranoid about accidental sign extension on address 3165 jlong addr = (jlong) ((uintptr_t) address); 3166 // NOTE that package-private DirectByteBuffer constructor currently 3167 // takes int capacity 3168 jint cap = (jint) capacity; 3169 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3170 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3171 return ret; 3172 } 3173 3174 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3175 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3176 3177 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3178 { 3179 // thread_from_jni_environment() will block if VM is gone. 3180 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3181 3182 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3183 void* ret = NULL; 3184 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3185 3186 if (!directBufferSupportInitializeEnded) { 3187 if (!initializeDirectBufferSupport(env, thread)) { 3188 return 0; 3189 } 3190 } 3191 3192 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3193 return 0; 3194 } 3195 3196 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3197 return ret; 3198 } 3199 3200 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3201 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3202 3203 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3204 { 3205 // thread_from_jni_environment() will block if VM is gone. 3206 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3207 3208 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3209 jlong ret = -1; 3210 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3211 3212 if (!directBufferSupportInitializeEnded) { 3213 if (!initializeDirectBufferSupport(env, thread)) { 3214 ret = 0; 3215 return ret; 3216 } 3217 } 3218 3219 if (buf == NULL) { 3220 return -1; 3221 } 3222 3223 if (!env->IsInstanceOf(buf, directBufferClass)) { 3224 return -1; 3225 } 3226 3227 // NOTE that capacity is currently an int in the implementation 3228 ret = env->GetIntField(buf, bufferCapacityField); 3229 return ret; 3230 } 3231 3232 3233 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3234 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3235 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3236 return CurrentVersion; 3237 JNI_END 3238 3239 extern struct JavaVM_ main_vm; 3240 3241 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3242 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3243 *vm = (JavaVM *)(&main_vm); 3244 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3245 return JNI_OK; 3246 JNI_END 3247 3248 3249 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3250 return Modules::get_module(clazz, THREAD); 3251 JNI_END 3252 3253 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj)) 3254 oop thread_obj = JNIHandles::resolve_external_guard(obj); 3255 if (thread_obj != NULL && thread_obj->is_a(vmClasses::BasicVirtualThread_klass())) { 3256 return JNI_TRUE; 3257 } else { 3258 return JNI_FALSE; 3259 } 3260 JNI_END 3261 3262 3263 // Structure containing all jni functions 3264 struct JNINativeInterface_ jni_NativeInterface = { 3265 NULL, 3266 NULL, 3267 NULL, 3268 3269 NULL, 3270 3271 jni_GetVersion, 3272 3273 jni_DefineClass, 3274 jni_FindClass, 3275 3276 jni_FromReflectedMethod, 3277 jni_FromReflectedField, 3278 3279 jni_ToReflectedMethod, 3280 3281 jni_GetSuperclass, 3282 jni_IsAssignableFrom, 3283 3284 jni_ToReflectedField, 3285 3286 jni_Throw, 3287 jni_ThrowNew, 3288 jni_ExceptionOccurred, 3289 jni_ExceptionDescribe, 3290 jni_ExceptionClear, 3291 jni_FatalError, 3292 3293 jni_PushLocalFrame, 3294 jni_PopLocalFrame, 3295 3296 jni_NewGlobalRef, 3297 jni_DeleteGlobalRef, 3298 jni_DeleteLocalRef, 3299 jni_IsSameObject, 3300 3301 jni_NewLocalRef, 3302 jni_EnsureLocalCapacity, 3303 3304 jni_AllocObject, 3305 jni_NewObject, 3306 jni_NewObjectV, 3307 jni_NewObjectA, 3308 3309 jni_GetObjectClass, 3310 jni_IsInstanceOf, 3311 3312 jni_GetMethodID, 3313 3314 jni_CallObjectMethod, 3315 jni_CallObjectMethodV, 3316 jni_CallObjectMethodA, 3317 jni_CallBooleanMethod, 3318 jni_CallBooleanMethodV, 3319 jni_CallBooleanMethodA, 3320 jni_CallByteMethod, 3321 jni_CallByteMethodV, 3322 jni_CallByteMethodA, 3323 jni_CallCharMethod, 3324 jni_CallCharMethodV, 3325 jni_CallCharMethodA, 3326 jni_CallShortMethod, 3327 jni_CallShortMethodV, 3328 jni_CallShortMethodA, 3329 jni_CallIntMethod, 3330 jni_CallIntMethodV, 3331 jni_CallIntMethodA, 3332 jni_CallLongMethod, 3333 jni_CallLongMethodV, 3334 jni_CallLongMethodA, 3335 jni_CallFloatMethod, 3336 jni_CallFloatMethodV, 3337 jni_CallFloatMethodA, 3338 jni_CallDoubleMethod, 3339 jni_CallDoubleMethodV, 3340 jni_CallDoubleMethodA, 3341 jni_CallVoidMethod, 3342 jni_CallVoidMethodV, 3343 jni_CallVoidMethodA, 3344 3345 jni_CallNonvirtualObjectMethod, 3346 jni_CallNonvirtualObjectMethodV, 3347 jni_CallNonvirtualObjectMethodA, 3348 jni_CallNonvirtualBooleanMethod, 3349 jni_CallNonvirtualBooleanMethodV, 3350 jni_CallNonvirtualBooleanMethodA, 3351 jni_CallNonvirtualByteMethod, 3352 jni_CallNonvirtualByteMethodV, 3353 jni_CallNonvirtualByteMethodA, 3354 jni_CallNonvirtualCharMethod, 3355 jni_CallNonvirtualCharMethodV, 3356 jni_CallNonvirtualCharMethodA, 3357 jni_CallNonvirtualShortMethod, 3358 jni_CallNonvirtualShortMethodV, 3359 jni_CallNonvirtualShortMethodA, 3360 jni_CallNonvirtualIntMethod, 3361 jni_CallNonvirtualIntMethodV, 3362 jni_CallNonvirtualIntMethodA, 3363 jni_CallNonvirtualLongMethod, 3364 jni_CallNonvirtualLongMethodV, 3365 jni_CallNonvirtualLongMethodA, 3366 jni_CallNonvirtualFloatMethod, 3367 jni_CallNonvirtualFloatMethodV, 3368 jni_CallNonvirtualFloatMethodA, 3369 jni_CallNonvirtualDoubleMethod, 3370 jni_CallNonvirtualDoubleMethodV, 3371 jni_CallNonvirtualDoubleMethodA, 3372 jni_CallNonvirtualVoidMethod, 3373 jni_CallNonvirtualVoidMethodV, 3374 jni_CallNonvirtualVoidMethodA, 3375 3376 jni_GetFieldID, 3377 3378 jni_GetObjectField, 3379 jni_GetBooleanField, 3380 jni_GetByteField, 3381 jni_GetCharField, 3382 jni_GetShortField, 3383 jni_GetIntField, 3384 jni_GetLongField, 3385 jni_GetFloatField, 3386 jni_GetDoubleField, 3387 3388 jni_SetObjectField, 3389 jni_SetBooleanField, 3390 jni_SetByteField, 3391 jni_SetCharField, 3392 jni_SetShortField, 3393 jni_SetIntField, 3394 jni_SetLongField, 3395 jni_SetFloatField, 3396 jni_SetDoubleField, 3397 3398 jni_GetStaticMethodID, 3399 3400 jni_CallStaticObjectMethod, 3401 jni_CallStaticObjectMethodV, 3402 jni_CallStaticObjectMethodA, 3403 jni_CallStaticBooleanMethod, 3404 jni_CallStaticBooleanMethodV, 3405 jni_CallStaticBooleanMethodA, 3406 jni_CallStaticByteMethod, 3407 jni_CallStaticByteMethodV, 3408 jni_CallStaticByteMethodA, 3409 jni_CallStaticCharMethod, 3410 jni_CallStaticCharMethodV, 3411 jni_CallStaticCharMethodA, 3412 jni_CallStaticShortMethod, 3413 jni_CallStaticShortMethodV, 3414 jni_CallStaticShortMethodA, 3415 jni_CallStaticIntMethod, 3416 jni_CallStaticIntMethodV, 3417 jni_CallStaticIntMethodA, 3418 jni_CallStaticLongMethod, 3419 jni_CallStaticLongMethodV, 3420 jni_CallStaticLongMethodA, 3421 jni_CallStaticFloatMethod, 3422 jni_CallStaticFloatMethodV, 3423 jni_CallStaticFloatMethodA, 3424 jni_CallStaticDoubleMethod, 3425 jni_CallStaticDoubleMethodV, 3426 jni_CallStaticDoubleMethodA, 3427 jni_CallStaticVoidMethod, 3428 jni_CallStaticVoidMethodV, 3429 jni_CallStaticVoidMethodA, 3430 3431 jni_GetStaticFieldID, 3432 3433 jni_GetStaticObjectField, 3434 jni_GetStaticBooleanField, 3435 jni_GetStaticByteField, 3436 jni_GetStaticCharField, 3437 jni_GetStaticShortField, 3438 jni_GetStaticIntField, 3439 jni_GetStaticLongField, 3440 jni_GetStaticFloatField, 3441 jni_GetStaticDoubleField, 3442 3443 jni_SetStaticObjectField, 3444 jni_SetStaticBooleanField, 3445 jni_SetStaticByteField, 3446 jni_SetStaticCharField, 3447 jni_SetStaticShortField, 3448 jni_SetStaticIntField, 3449 jni_SetStaticLongField, 3450 jni_SetStaticFloatField, 3451 jni_SetStaticDoubleField, 3452 3453 jni_NewString, 3454 jni_GetStringLength, 3455 jni_GetStringChars, 3456 jni_ReleaseStringChars, 3457 3458 jni_NewStringUTF, 3459 jni_GetStringUTFLength, 3460 jni_GetStringUTFChars, 3461 jni_ReleaseStringUTFChars, 3462 3463 jni_GetArrayLength, 3464 3465 jni_NewObjectArray, 3466 jni_GetObjectArrayElement, 3467 jni_SetObjectArrayElement, 3468 3469 jni_NewBooleanArray, 3470 jni_NewByteArray, 3471 jni_NewCharArray, 3472 jni_NewShortArray, 3473 jni_NewIntArray, 3474 jni_NewLongArray, 3475 jni_NewFloatArray, 3476 jni_NewDoubleArray, 3477 3478 jni_GetBooleanArrayElements, 3479 jni_GetByteArrayElements, 3480 jni_GetCharArrayElements, 3481 jni_GetShortArrayElements, 3482 jni_GetIntArrayElements, 3483 jni_GetLongArrayElements, 3484 jni_GetFloatArrayElements, 3485 jni_GetDoubleArrayElements, 3486 3487 jni_ReleaseBooleanArrayElements, 3488 jni_ReleaseByteArrayElements, 3489 jni_ReleaseCharArrayElements, 3490 jni_ReleaseShortArrayElements, 3491 jni_ReleaseIntArrayElements, 3492 jni_ReleaseLongArrayElements, 3493 jni_ReleaseFloatArrayElements, 3494 jni_ReleaseDoubleArrayElements, 3495 3496 jni_GetBooleanArrayRegion, 3497 jni_GetByteArrayRegion, 3498 jni_GetCharArrayRegion, 3499 jni_GetShortArrayRegion, 3500 jni_GetIntArrayRegion, 3501 jni_GetLongArrayRegion, 3502 jni_GetFloatArrayRegion, 3503 jni_GetDoubleArrayRegion, 3504 3505 jni_SetBooleanArrayRegion, 3506 jni_SetByteArrayRegion, 3507 jni_SetCharArrayRegion, 3508 jni_SetShortArrayRegion, 3509 jni_SetIntArrayRegion, 3510 jni_SetLongArrayRegion, 3511 jni_SetFloatArrayRegion, 3512 jni_SetDoubleArrayRegion, 3513 3514 jni_RegisterNatives, 3515 jni_UnregisterNatives, 3516 3517 jni_MonitorEnter, 3518 jni_MonitorExit, 3519 3520 jni_GetJavaVM, 3521 3522 jni_GetStringRegion, 3523 jni_GetStringUTFRegion, 3524 3525 jni_GetPrimitiveArrayCritical, 3526 jni_ReleasePrimitiveArrayCritical, 3527 3528 jni_GetStringCritical, 3529 jni_ReleaseStringCritical, 3530 3531 jni_NewWeakGlobalRef, 3532 jni_DeleteWeakGlobalRef, 3533 3534 jni_ExceptionCheck, 3535 3536 jni_NewDirectByteBuffer, 3537 jni_GetDirectBufferAddress, 3538 jni_GetDirectBufferCapacity, 3539 3540 // New 1_6 features 3541 3542 jni_GetObjectRefType, 3543 3544 // Module features 3545 3546 jni_GetModule, 3547 3548 // Virtual threads 3549 3550 jni_IsVirtualThread 3551 }; 3552 3553 3554 // For jvmti use to modify jni function table. 3555 // Java threads in native contiues to run until it is transitioned 3556 // to VM at safepoint. Before the transition or before it is blocked 3557 // for safepoint it may access jni function table. VM could crash if 3558 // any java thread access the jni function table in the middle of memcpy. 3559 // To avoid this each function pointers are copied automically. 3560 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3561 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3562 intptr_t *a = (intptr_t *) jni_functions(); 3563 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3564 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3565 Atomic::store(a++, *b++); 3566 } 3567 } 3568 3569 void quicken_jni_functions() { 3570 // Replace Get<Primitive>Field with fast versions 3571 if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) { 3572 address func; 3573 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3574 if (func != (address)-1) { 3575 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3576 } 3577 func = JNI_FastGetField::generate_fast_get_byte_field(); 3578 if (func != (address)-1) { 3579 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3580 } 3581 func = JNI_FastGetField::generate_fast_get_char_field(); 3582 if (func != (address)-1) { 3583 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3584 } 3585 func = JNI_FastGetField::generate_fast_get_short_field(); 3586 if (func != (address)-1) { 3587 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3588 } 3589 func = JNI_FastGetField::generate_fast_get_int_field(); 3590 if (func != (address)-1) { 3591 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3592 } 3593 func = JNI_FastGetField::generate_fast_get_long_field(); 3594 if (func != (address)-1) { 3595 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3596 } 3597 func = JNI_FastGetField::generate_fast_get_float_field(); 3598 if (func != (address)-1) { 3599 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3600 } 3601 func = JNI_FastGetField::generate_fast_get_double_field(); 3602 if (func != (address)-1) { 3603 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3604 } 3605 } 3606 } 3607 3608 // Returns the function structure 3609 struct JNINativeInterface_* jni_functions() { 3610 #if INCLUDE_JNI_CHECK 3611 if (CheckJNICalls) return jni_functions_check(); 3612 #endif // INCLUDE_JNI_CHECK 3613 return &jni_NativeInterface; 3614 } 3615 3616 // Returns the function structure 3617 struct JNINativeInterface_* jni_functions_nocheck() { 3618 return &jni_NativeInterface; 3619 } 3620 3621 static void post_thread_start_event(const JavaThread* jt) { 3622 assert(jt != NULL, "invariant"); 3623 EventThreadStart event; 3624 if (event.should_commit()) { 3625 event.set_thread(JFR_JVM_THREAD_ID(jt)); 3626 event.set_parentThread((traceid)0); 3627 #if INCLUDE_JFR 3628 if (EventThreadStart::is_stacktrace_enabled()) { 3629 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0); 3630 event.commit(); 3631 jt->jfr_thread_local()->clear_cached_stack_trace(); 3632 } else 3633 #endif 3634 { 3635 event.commit(); 3636 } 3637 } 3638 } 3639 3640 // Invocation API 3641 3642 3643 // Forward declaration 3644 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3645 3646 // Global invocation API vars 3647 volatile int vm_created = 0; 3648 // Indicate whether it is safe to recreate VM. Recreation is only 3649 // possible after a failed initial creation attempt in some cases. 3650 volatile int safe_to_recreate_vm = 1; 3651 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3652 3653 3654 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3655 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3656 3657 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3658 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3659 3660 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3661 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3662 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3663 jint ret = JNI_ERR; 3664 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3665 3666 if (Threads::is_supported_jni_version(args->version)) { 3667 ret = JNI_OK; 3668 } 3669 // 1.1 style no longer supported in hotspot. 3670 // According the JNI spec, we should update args->version on return. 3671 // We also use the structure to communicate with launcher about default 3672 // stack size. 3673 if (args->version == JNI_VERSION_1_1) { 3674 args->version = JNI_VERSION_1_2; 3675 // javaStackSize is int in arguments structure 3676 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3677 args->javaStackSize = (jint)(ThreadStackSize * K); 3678 } 3679 return ret; 3680 } 3681 3682 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3683 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3684 3685 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3686 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3687 3688 jint result = JNI_ERR; 3689 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3690 3691 // We're about to use Atomic::xchg for synchronization. Some Zero 3692 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3693 // but __sync_lock_test_and_set is not guaranteed to do what we want 3694 // on all architectures. So we check it works before relying on it. 3695 #if defined(ZERO) && defined(ASSERT) 3696 { 3697 jint a = 0xcafebabe; 3698 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3699 void *c = &a; 3700 void *d = Atomic::xchg(&c, &b); 3701 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3702 assert(c == &b && d == &a, "Atomic::xchg() works"); 3703 } 3704 #endif // ZERO && ASSERT 3705 3706 // At the moment it's only possible to have one Java VM, 3707 // since some of the runtime state is in global variables. 3708 3709 // We cannot use our mutex locks here, since they only work on 3710 // Threads. We do an atomic compare and exchange to ensure only 3711 // one thread can call this method at a time 3712 3713 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3714 // the add/dec implementations are dependent on whether we are running 3715 // on a multiprocessor Atomic::xchg does not have this problem. 3716 if (Atomic::xchg(&vm_created, 1) == 1) { 3717 return JNI_EEXIST; // already created, or create attempt in progress 3718 } 3719 3720 // If a previous creation attempt failed but can be retried safely, 3721 // then safe_to_recreate_vm will have been reset to 1 after being 3722 // cleared here. If a previous creation attempt succeeded and we then 3723 // destroyed that VM, we will be prevented from trying to recreate 3724 // the VM in the same process, as the value will still be 0. 3725 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3726 return JNI_ERR; 3727 } 3728 3729 assert(vm_created == 1, "vm_created is true during the creation"); 3730 3731 /** 3732 * Certain errors during initialization are recoverable and do not 3733 * prevent this method from being called again at a later time 3734 * (perhaps with different arguments). However, at a certain 3735 * point during initialization if an error occurs we cannot allow 3736 * this function to be called again (or it will crash). In those 3737 * situations, the 'canTryAgain' flag is set to false, which atomically 3738 * sets safe_to_recreate_vm to 1, such that any new call to 3739 * JNI_CreateJavaVM will immediately fail using the above logic. 3740 */ 3741 bool can_try_again = true; 3742 3743 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3744 if (result == JNI_OK) { 3745 JavaThread *thread = JavaThread::current(); 3746 assert(!thread->has_pending_exception(), "should have returned not OK"); 3747 /* thread is thread_in_vm here */ 3748 *vm = (JavaVM *)(&main_vm); 3749 *(JNIEnv**)penv = thread->jni_environment(); 3750 3751 #if INCLUDE_JVMCI 3752 if (EnableJVMCI) { 3753 if (UseJVMCICompiler) { 3754 // JVMCI is initialized on a CompilerThread 3755 if (BootstrapJVMCI) { 3756 JavaThread* THREAD = thread; // For exception macros. 3757 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3758 compiler->bootstrap(THREAD); 3759 if (HAS_PENDING_EXCEPTION) { 3760 HandleMark hm(THREAD); 3761 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3762 } 3763 } 3764 } 3765 } 3766 #endif 3767 3768 // Notify JVMTI 3769 if (JvmtiExport::should_post_thread_life()) { 3770 JvmtiExport::post_thread_start(thread); 3771 } 3772 3773 post_thread_start_event(thread); 3774 3775 if (ReplayCompiles) ciReplay::replay(thread); 3776 3777 #ifdef ASSERT 3778 // Some platforms (like Win*) need a wrapper around these test 3779 // functions in order to properly handle error conditions. 3780 if (ErrorHandlerTest != 0) { 3781 VMError::controlled_crash(ErrorHandlerTest); 3782 } 3783 #endif 3784 3785 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3786 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 3787 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 3788 } else { 3789 // If create_vm exits because of a pending exception, exit with that 3790 // exception. In the future when we figure out how to reclaim memory, 3791 // we may be able to exit with JNI_ERR and allow the calling application 3792 // to continue. 3793 if (Universe::is_fully_initialized()) { 3794 // otherwise no pending exception possible - VM will already have aborted 3795 JavaThread* THREAD = JavaThread::current(); // For exception macros. 3796 if (HAS_PENDING_EXCEPTION) { 3797 HandleMark hm(THREAD); 3798 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3799 } 3800 } 3801 3802 if (can_try_again) { 3803 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3804 safe_to_recreate_vm = 1; 3805 } 3806 3807 // Creation failed. We must reset vm_created 3808 *vm = 0; 3809 *(JNIEnv**)penv = 0; 3810 // reset vm_created last to avoid race condition. Use OrderAccess to 3811 // control both compiler and architectural-based reordering. 3812 Atomic::release_store(&vm_created, 0); 3813 } 3814 3815 // Flush stdout and stderr before exit. 3816 fflush(stdout); 3817 fflush(stderr); 3818 3819 return result; 3820 3821 } 3822 3823 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3824 jint result = JNI_ERR; 3825 // On Windows, let CreateJavaVM run with SEH protection 3826 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3827 __try { 3828 #endif 3829 result = JNI_CreateJavaVM_inner(vm, penv, args); 3830 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3831 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3832 // Nothing to do. 3833 } 3834 #endif 3835 return result; 3836 } 3837 3838 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3839 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3840 3841 if (vm_created == 1) { 3842 if (numVMs != NULL) *numVMs = 1; 3843 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3844 } else { 3845 if (numVMs != NULL) *numVMs = 0; 3846 } 3847 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3848 return JNI_OK; 3849 } 3850 3851 extern "C" { 3852 3853 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3854 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3855 3856 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3857 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3858 jint res = JNI_ERR; 3859 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3860 3861 if (vm_created == 0) { 3862 res = JNI_ERR; 3863 return res; 3864 } 3865 3866 JNIEnv *env; 3867 JavaVMAttachArgs destroyargs; 3868 destroyargs.version = CurrentVersion; 3869 destroyargs.name = (char *)"DestroyJavaVM"; 3870 destroyargs.group = NULL; 3871 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3872 if (res != JNI_OK) { 3873 return res; 3874 } 3875 3876 JavaThread* thread = JavaThread::current(); 3877 3878 // Make sure we are actually in a newly attached thread, with no 3879 // existing Java frame. 3880 if (thread->has_last_Java_frame()) { 3881 return JNI_ERR; 3882 } 3883 3884 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3885 3886 // We are going to VM, change W^X state to the expected one. 3887 MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite)); 3888 3889 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3890 Threads::destroy_vm(); 3891 // Don't bother restoring thread state, VM is gone. 3892 vm_created = 0; 3893 return JNI_OK; 3894 } 3895 3896 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3897 jint result = JNI_ERR; 3898 // On Windows, we need SEH protection 3899 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3900 __try { 3901 #endif 3902 result = jni_DestroyJavaVM_inner(vm); 3903 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING) 3904 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3905 // Nothing to do. 3906 } 3907 #endif 3908 return result; 3909 } 3910 3911 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3912 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3913 3914 // Check below commented out from JDK1.2fcs as well 3915 /* 3916 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3917 return JNI_EVERSION; 3918 } 3919 */ 3920 3921 Thread* t = Thread::current_or_null(); 3922 if (t != NULL) { 3923 // If executing from an atexit hook we may be in the VMThread. 3924 if (t->is_Java_thread()) { 3925 // If the thread has been attached this operation is a no-op 3926 *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment(); 3927 return JNI_OK; 3928 } else { 3929 return JNI_ERR; 3930 } 3931 } 3932 3933 // Create a thread and mark it as attaching so it will be skipped by the 3934 // ThreadsListEnumerator - see CR 6404306 3935 JavaThread* thread = new JavaThread(true); 3936 3937 // Set correct safepoint info. The thread is going to call into Java when 3938 // initializing the Java level thread object. Hence, the correct state must 3939 // be set in order for the Safepoint code to deal with it correctly. 3940 thread->set_thread_state(_thread_in_vm); 3941 thread->record_stack_base_and_size(); 3942 thread->register_thread_stack_with_NMT(); 3943 thread->initialize_thread_current(); 3944 MACOS_AARCH64_ONLY(thread->init_wx()); 3945 3946 if (!os::create_attached_thread(thread)) { 3947 thread->smr_delete(); 3948 return JNI_ERR; 3949 } 3950 // Enable stack overflow checks 3951 thread->stack_overflow_state()->create_stack_guard_pages(); 3952 3953 thread->initialize_tlab(); 3954 3955 thread->cache_global_variables(); 3956 3957 // This thread will not do a safepoint check, since it has 3958 // not been added to the Thread list yet. 3959 { MutexLocker ml(Threads_lock); 3960 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3961 // avoid this thread trying to do a GC before it is added to the thread-list 3962 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3963 Threads::add(thread, daemon); 3964 } 3965 // Create thread group and name info from attach arguments 3966 oop group = NULL; 3967 char* thread_name = NULL; 3968 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 3969 group = JNIHandles::resolve(args->group); 3970 thread_name = args->name; // may be NULL 3971 } 3972 if (group == NULL) group = Universe::main_thread_group(); 3973 3974 // Create Java level thread object and attach it to this thread 3975 bool attach_failed = false; 3976 { 3977 EXCEPTION_MARK; 3978 HandleMark hm(THREAD); 3979 Handle thread_group(THREAD, group); 3980 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3981 if (HAS_PENDING_EXCEPTION) { 3982 CLEAR_PENDING_EXCEPTION; 3983 // cleanup outside the handle mark. 3984 attach_failed = true; 3985 } 3986 } 3987 3988 if (attach_failed) { 3989 // Added missing cleanup 3990 thread->cleanup_failed_attach_current_thread(daemon); 3991 return JNI_ERR; 3992 } 3993 3994 // mark the thread as no longer attaching 3995 // this uses a fence to push the change through so we don't have 3996 // to regrab the threads_lock 3997 thread->set_done_attaching_via_jni(); 3998 3999 // Set java thread status. 4000 java_lang_Thread::set_thread_status(thread->threadObj(), 4001 JavaThreadStatus::RUNNABLE); 4002 4003 // Notify the debugger 4004 if (JvmtiExport::should_post_thread_life()) { 4005 JvmtiExport::post_thread_start(thread); 4006 } 4007 4008 post_thread_start_event(thread); 4009 4010 *(JNIEnv**)penv = thread->jni_environment(); 4011 4012 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4013 // of in the JVM_ENTRY. But in this situation we have to do it manually. 4014 ThreadStateTransition::transition_from_vm(thread, _thread_in_native); 4015 MACOS_AARCH64_ONLY(thread->enable_wx(WXExec)); 4016 4017 // Perform any platform dependent FPU setup 4018 os::setup_fpu(); 4019 4020 return JNI_OK; 4021 } 4022 4023 4024 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4025 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4026 if (vm_created == 0) { 4027 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4028 return JNI_ERR; 4029 } 4030 4031 jint ret = attach_current_thread(vm, penv, _args, false); 4032 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4033 return ret; 4034 } 4035 4036 4037 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4038 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4039 if (vm_created == 0) { 4040 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 4041 return JNI_ERR; 4042 } 4043 4044 Thread* current = Thread::current_or_null(); 4045 4046 // If the thread has already been detached the operation is a no-op 4047 if (current == NULL) { 4048 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4049 return JNI_OK; 4050 } 4051 4052 // If executing from an atexit hook we may be in the VMThread. 4053 if (!current->is_Java_thread()) { 4054 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4055 return JNI_ERR; 4056 } 4057 4058 VM_Exit::block_if_vm_exited(); 4059 4060 JavaThread* thread = JavaThread::cast(current); 4061 if (thread->has_last_Java_frame()) { 4062 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4063 // Can't detach a thread that's running java, that can't work. 4064 return JNI_ERR; 4065 } 4066 4067 // We are going to VM, change W^X state to the expected one. 4068 MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite)); 4069 4070 // Safepoint support. Have to do call-back to safepoint code, if in the 4071 // middle of a safepoint operation 4072 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4073 4074 // XXX: Note that JavaThread::exit() call below removes the guards on the 4075 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4076 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4077 // of the guards is visible in jni_AttachCurrentThread above, 4078 // the removal of the guards is buried below in JavaThread::exit() 4079 // here. The abstraction should be more symmetrically either exposed 4080 // or hidden (e.g. it could probably be hidden in the same 4081 // (platform-dependent) methods where we do alternate stack 4082 // maintenance work?) 4083 thread->exit(false, JavaThread::jni_detach); 4084 thread->smr_delete(); 4085 4086 // Go to the execute mode, the initial state of the thread on creation. 4087 // Use os interface as the thread is not a JavaThread anymore. 4088 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec)); 4089 4090 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4091 return JNI_OK; 4092 } 4093 4094 DT_RETURN_MARK_DECL(GetEnv, jint 4095 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4096 4097 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4098 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4099 jint ret = JNI_ERR; 4100 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4101 4102 if (vm_created == 0) { 4103 *penv = NULL; 4104 ret = JNI_EDETACHED; 4105 return ret; 4106 } 4107 4108 // No JVM TI with --enable-preview and no continuations support. 4109 if (!VMContinuations && Arguments::enable_preview() && JvmtiExport::is_jvmti_version(version)) { 4110 *penv = NULL; 4111 ret = JNI_EVERSION; 4112 return ret; 4113 } 4114 4115 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4116 return ret; 4117 } 4118 4119 #ifndef JVMPI_VERSION_1 4120 // need these in order to be polite about older agents 4121 #define JVMPI_VERSION_1 ((jint)0x10000001) 4122 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4123 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4124 #endif // !JVMPI_VERSION_1 4125 4126 Thread* thread = Thread::current_or_null(); 4127 if (thread != NULL && thread->is_Java_thread()) { 4128 if (Threads::is_supported_jni_version_including_1_1(version)) { 4129 *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment(); 4130 ret = JNI_OK; 4131 return ret; 4132 4133 } else if (version == JVMPI_VERSION_1 || 4134 version == JVMPI_VERSION_1_1 || 4135 version == JVMPI_VERSION_1_2) { 4136 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4137 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4138 ret = JNI_EVERSION; 4139 return ret; 4140 } else if (JvmtiExport::is_jvmdi_version(version)) { 4141 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4142 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4143 ret = JNI_EVERSION; 4144 return ret; 4145 } else { 4146 *penv = NULL; 4147 ret = JNI_EVERSION; 4148 return ret; 4149 } 4150 } else { 4151 *penv = NULL; 4152 ret = JNI_EDETACHED; 4153 return ret; 4154 } 4155 } 4156 4157 4158 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4159 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4160 if (vm_created == 0) { 4161 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4162 return JNI_ERR; 4163 } 4164 4165 jint ret = attach_current_thread(vm, penv, _args, true); 4166 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4167 return ret; 4168 } 4169 4170 4171 } // End extern "C" 4172 4173 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4174 NULL, 4175 NULL, 4176 NULL, 4177 4178 jni_DestroyJavaVM, 4179 jni_AttachCurrentThread, 4180 jni_DetachCurrentThread, 4181 jni_GetEnv, 4182 jni_AttachCurrentThreadAsDaemon 4183 };