1 /* 2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "jni.h" 28 #include "jvm.h" 29 #include "ci/ciReplay.hpp" 30 #include "classfile/altHashing.hpp" 31 #include "classfile/classFileStream.hpp" 32 #include "classfile/classLoader.hpp" 33 #include "classfile/javaClasses.hpp" 34 #include "classfile/javaClasses.inline.hpp" 35 #include "classfile/moduleEntry.hpp" 36 #include "classfile/modules.hpp" 37 #include "classfile/symbolTable.hpp" 38 #include "classfile/systemDictionary.hpp" 39 #include "classfile/vmSymbols.hpp" 40 #include "gc/shared/gcLocker.inline.hpp" 41 #include "interpreter/linkResolver.hpp" 42 #include "jfr/jfrEvents.hpp" 43 #include "jfr/support/jfrThreadId.hpp" 44 #include "logging/log.hpp" 45 #include "memory/allocation.hpp" 46 #include "memory/allocation.inline.hpp" 47 #include "memory/oopFactory.hpp" 48 #include "memory/resourceArea.hpp" 49 #include "memory/universe.hpp" 50 #include "oops/access.inline.hpp" 51 #include "oops/arrayOop.inline.hpp" 52 #include "oops/instanceKlass.inline.hpp" 53 #include "oops/instanceOop.hpp" 54 #include "oops/markWord.hpp" 55 #include "oops/method.hpp" 56 #include "oops/objArrayKlass.hpp" 57 #include "oops/objArrayOop.inline.hpp" 58 #include "oops/oop.inline.hpp" 59 #include "oops/symbol.hpp" 60 #include "oops/typeArrayKlass.hpp" 61 #include "oops/typeArrayOop.inline.hpp" 62 #include "prims/jniCheck.hpp" 63 #include "prims/jniExport.hpp" 64 #include "prims/jniFastGetField.hpp" 65 #include "prims/jvm_misc.hpp" 66 #include "prims/jvmtiExport.hpp" 67 #include "prims/jvmtiThreadState.hpp" 68 #include "runtime/atomic.hpp" 69 #include "runtime/fieldDescriptor.inline.hpp" 70 #include "runtime/handles.inline.hpp" 71 #include "runtime/interfaceSupport.inline.hpp" 72 #include "runtime/java.hpp" 73 #include "runtime/javaCalls.hpp" 74 #include "runtime/jfieldIDWorkaround.hpp" 75 #include "runtime/jniHandles.inline.hpp" 76 #include "runtime/reflection.hpp" 77 #include "runtime/safepointVerifiers.hpp" 78 #include "runtime/sharedRuntime.hpp" 79 #include "runtime/signature.hpp" 80 #include "runtime/thread.inline.hpp" 81 #include "runtime/vmOperations.hpp" 82 #include "services/memTracker.hpp" 83 #include "services/runtimeService.hpp" 84 #include "utilities/defaultStream.hpp" 85 #include "utilities/dtrace.hpp" 86 #include "utilities/events.hpp" 87 #include "utilities/histogram.hpp" 88 #include "utilities/macros.hpp" 89 #include "utilities/vmError.hpp" 90 #if INCLUDE_JVMCI 91 #include "jvmci/jvmciCompiler.hpp" 92 #endif 93 94 static jint CurrentVersion = JNI_VERSION_10; 95 96 #ifdef _WIN32 97 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 98 #endif 99 100 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 101 // '-return' probe regardless of the return path is taken out of the function. 102 // Methods that have multiple return paths use this to avoid having to 103 // instrument each return path. Methods that use CHECK or THROW must use this 104 // since those macros can cause an immedate uninstrumented return. 105 // 106 // In order to get the return value, a reference to the variable containing 107 // the return value must be passed to the contructor of the object, and 108 // the return value must be set before return (since the mark object has 109 // a reference to it). 110 // 111 // Example: 112 // DT_RETURN_MARK_DECL(SomeFunc, int); 113 // JNI_ENTRY(int, SomeFunc, ...) 114 // int return_value = 0; 115 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 116 // foo(CHECK_0) 117 // return_value = 5; 118 // return return_value; 119 // JNI_END 120 #define DT_RETURN_MARK_DECL(name, type, probe) \ 121 DTRACE_ONLY( \ 122 class DTraceReturnProbeMark_##name { \ 123 public: \ 124 const type& _ret_ref; \ 125 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 126 ~DTraceReturnProbeMark_##name() { \ 127 probe; \ 128 } \ 129 } \ 130 ) 131 // Void functions are simpler since there's no return value 132 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 133 DTRACE_ONLY( \ 134 class DTraceReturnProbeMark_##name { \ 135 public: \ 136 ~DTraceReturnProbeMark_##name() { \ 137 probe; \ 138 } \ 139 } \ 140 ) 141 142 // Place these macros in the function to mark the return. Non-void 143 // functions need the type and address of the return value. 144 #define DT_RETURN_MARK(name, type, ref) \ 145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 146 #define DT_VOID_RETURN_MARK(name) \ 147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 148 149 150 // Use these to select distinct code for floating-point vs. non-floating point 151 // situations. Used from within common macros where we need slightly 152 // different behavior for Float/Double 153 #define FP_SELECT_Boolean(intcode, fpcode) intcode 154 #define FP_SELECT_Byte(intcode, fpcode) intcode 155 #define FP_SELECT_Char(intcode, fpcode) intcode 156 #define FP_SELECT_Short(intcode, fpcode) intcode 157 #define FP_SELECT_Object(intcode, fpcode) intcode 158 #define FP_SELECT_Int(intcode, fpcode) intcode 159 #define FP_SELECT_Long(intcode, fpcode) intcode 160 #define FP_SELECT_Float(intcode, fpcode) fpcode 161 #define FP_SELECT_Double(intcode, fpcode) fpcode 162 #define FP_SELECT(TypeName, intcode, fpcode) \ 163 FP_SELECT_##TypeName(intcode, fpcode) 164 165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 166 // (dtrace doesn't do FP yet) 167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 168 FP_SELECT(TypeName, \ 169 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 171 FP_SELECT(TypeName, \ 172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 173 174 175 // out-of-line helpers for class jfieldIDWorkaround: 176 177 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 179 uintptr_t as_uint = (uintptr_t) id; 180 intptr_t offset = raw_instance_offset(id); 181 if (is_checked_jfieldID(id)) { 182 if (!klass_hash_ok(k, id)) { 183 return false; 184 } 185 } 186 return InstanceKlass::cast(k)->contains_field_offset(offset); 187 } else { 188 JNIid* result = (JNIid*) id; 189 #ifdef ASSERT 190 return result != NULL && result->is_static_field_id(); 191 #else 192 return result != NULL; 193 #endif 194 } 195 } 196 197 198 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 199 if (offset <= small_offset_mask) { 200 Klass* field_klass = k; 201 Klass* super_klass = field_klass->super(); 202 // With compressed oops the most super class with nonstatic fields would 203 // be the owner of fields embedded in the header. 204 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 205 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 206 field_klass = super_klass; // super contains the field also 207 super_klass = field_klass->super(); 208 } 209 debug_only(NoSafepointVerifier nosafepoint;) 210 uintptr_t klass_hash = field_klass->identity_hash(); 211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 212 } else { 213 #if 0 214 #ifndef PRODUCT 215 { 216 ResourceMark rm; 217 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 218 } 219 #endif 220 #endif 221 return 0; 222 } 223 } 224 225 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 226 uintptr_t as_uint = (uintptr_t) id; 227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 228 do { 229 debug_only(NoSafepointVerifier nosafepoint;) 230 // Could use a non-blocking query for identity_hash here... 231 if ((k->identity_hash() & klass_mask) == klass_hash) 232 return true; 233 k = k->super(); 234 } while (k != NULL); 235 return false; 236 } 237 238 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 240 uintptr_t as_uint = (uintptr_t) id; 241 intptr_t offset = raw_instance_offset(id); 242 if (VerifyJNIFields) { 243 if (is_checked_jfieldID(id)) { 244 guarantee(klass_hash_ok(k, id), 245 "Bug in native code: jfieldID class must match object"); 246 } else { 247 #if 0 248 #ifndef PRODUCT 249 if (Verbose) { 250 ResourceMark rm; 251 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 252 } 253 #endif 254 #endif 255 } 256 } 257 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 258 "Bug in native code: jfieldID offset must address interior of object"); 259 } 260 261 // Wrapper to trace JNI functions 262 263 #ifdef ASSERT 264 Histogram* JNIHistogram; 265 static volatile int JNIHistogram_lock = 0; 266 267 class JNIHistogramElement : public HistogramElement { 268 public: 269 JNIHistogramElement(const char* name); 270 }; 271 272 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 273 _name = elementName; 274 uintx count = 0; 275 276 while (Atomic::cmpxchg(&JNIHistogram_lock, 0, 1) != 0) { 277 while (Atomic::load_acquire(&JNIHistogram_lock) != 0) { 278 count +=1; 279 if ( (WarnOnStalledSpinLock > 0) 280 && (count % WarnOnStalledSpinLock == 0)) { 281 warning("JNIHistogram_lock seems to be stalled"); 282 } 283 } 284 } 285 286 287 if(JNIHistogram == NULL) 288 JNIHistogram = new Histogram("JNI Call Counts",100); 289 290 JNIHistogram->add_element(this); 291 Atomic::dec(&JNIHistogram_lock); 292 } 293 294 #define JNICountWrapper(arg) \ 295 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 296 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 297 if (e != NULL) e->increment_count() 298 #define JNIWrapper(arg) JNICountWrapper(arg); 299 #else 300 #define JNIWrapper(arg) 301 #endif 302 303 304 // Implementation of JNI entries 305 306 DT_RETURN_MARK_DECL(DefineClass, jclass 307 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 308 309 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 310 const jbyte *buf, jsize bufLen)) 311 JNIWrapper("DefineClass"); 312 313 HOTSPOT_JNI_DEFINECLASS_ENTRY( 314 env, (char*) name, loaderRef, (char*) buf, bufLen); 315 316 jclass cls = NULL; 317 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 318 319 // Class resolution will get the class name from the .class stream if the name is null. 320 TempNewSymbol class_name = name == NULL ? NULL : 321 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 322 CHECK_NULL); 323 324 ResourceMark rm(THREAD); 325 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 326 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 327 328 if (UsePerfData && !class_loader.is_null()) { 329 // check whether the current caller thread holds the lock or not. 330 // If not, increment the corresponding counter 331 if (ObjectSynchronizer::query_lock_ownership(thread, class_loader) != 332 ObjectSynchronizer::owner_self) { 333 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 334 } 335 } 336 Klass* k = SystemDictionary::resolve_from_stream(class_name, 337 class_loader, 338 Handle(), 339 &st, 340 CHECK_NULL); 341 342 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 343 trace_class_resolution(k); 344 } 345 346 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror()); 347 return cls; 348 JNI_END 349 350 351 352 DT_RETURN_MARK_DECL(FindClass, jclass 353 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 354 355 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 356 JNIWrapper("FindClass"); 357 358 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 359 360 jclass result = NULL; 361 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 362 363 // This should be ClassNotFoundException imo. 364 TempNewSymbol class_name = 365 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 366 CHECK_NULL); 367 368 //%note jni_3 369 Handle protection_domain; 370 // Find calling class 371 Klass* k = thread->security_get_caller_class(0); 372 // default to the system loader when no context 373 Handle loader(THREAD, SystemDictionary::java_system_loader()); 374 if (k != NULL) { 375 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 376 // in the correct class context. 377 if (k->class_loader() == NULL && 378 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) { 379 JavaValue result(T_OBJECT); 380 JavaCalls::call_static(&result, k, 381 vmSymbols::getFromClass_name(), 382 vmSymbols::void_class_signature(), 383 CHECK_NULL); 384 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns 385 // a non-NULL Class object. When invoked from JNI_OnUnload, 386 // it will return NULL to indicate no context. 387 oop mirror = (oop) result.get_jobject(); 388 if (mirror != NULL) { 389 Klass* fromClass = java_lang_Class::as_Klass(mirror); 390 loader = Handle(THREAD, fromClass->class_loader()); 391 protection_domain = Handle(THREAD, fromClass->protection_domain()); 392 } 393 } else { 394 loader = Handle(THREAD, k->class_loader()); 395 } 396 } 397 398 result = find_class_from_class_loader(env, class_name, true, loader, 399 protection_domain, true, thread); 400 401 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 402 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 403 } 404 405 return result; 406 JNI_END 407 408 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 409 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 410 411 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 412 JNIWrapper("FromReflectedMethod"); 413 414 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 415 416 jmethodID ret = NULL; 417 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 418 419 // method is a handle to a java.lang.reflect.Method object 420 oop reflected = JNIHandles::resolve_non_null(method); 421 oop mirror = NULL; 422 int slot = 0; 423 424 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 425 mirror = java_lang_reflect_Constructor::clazz(reflected); 426 slot = java_lang_reflect_Constructor::slot(reflected); 427 } else { 428 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 429 mirror = java_lang_reflect_Method::clazz(reflected); 430 slot = java_lang_reflect_Method::slot(reflected); 431 } 432 Klass* k1 = java_lang_Class::as_Klass(mirror); 433 434 // Make sure class is initialized before handing id's out to methods 435 k1->initialize(CHECK_NULL); 436 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 437 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 438 return ret; 439 JNI_END 440 441 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 442 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 443 444 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 445 JNIWrapper("FromReflectedField"); 446 447 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 448 449 jfieldID ret = NULL; 450 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 451 452 // field is a handle to a java.lang.reflect.Field object 453 oop reflected = JNIHandles::resolve_non_null(field); 454 oop mirror = java_lang_reflect_Field::clazz(reflected); 455 Klass* k1 = java_lang_Class::as_Klass(mirror); 456 int slot = java_lang_reflect_Field::slot(reflected); 457 int modifiers = java_lang_reflect_Field::modifiers(reflected); 458 459 // Make sure class is initialized before handing id's out to fields 460 k1->initialize(CHECK_NULL); 461 462 // First check if this is a static field 463 if (modifiers & JVM_ACC_STATIC) { 464 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 465 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 466 assert(id != NULL, "corrupt Field object"); 467 debug_only(id->set_is_static_field_id();) 468 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 469 ret = jfieldIDWorkaround::to_static_jfieldID(id); 470 return ret; 471 } 472 473 // The slot is the index of the field description in the field-array 474 // The jfieldID is the offset of the field within the object 475 // It may also have hash bits for k, if VerifyJNIFields is turned on. 476 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 477 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 478 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 479 return ret; 480 JNI_END 481 482 483 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 484 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 485 486 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 487 JNIWrapper("ToReflectedMethod"); 488 489 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 490 491 jobject ret = NULL; 492 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 493 494 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 495 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 496 oop reflection_method; 497 if (m->is_initializer()) { 498 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 499 } else { 500 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 501 } 502 ret = JNIHandles::make_local(THREAD, reflection_method); 503 return ret; 504 JNI_END 505 506 DT_RETURN_MARK_DECL(GetSuperclass, jclass 507 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 508 509 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 510 JNIWrapper("GetSuperclass"); 511 512 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 513 514 jclass obj = NULL; 515 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 516 517 oop mirror = JNIHandles::resolve_non_null(sub); 518 // primitive classes return NULL 519 if (java_lang_Class::is_primitive(mirror)) return NULL; 520 521 // Rules of Class.getSuperClass as implemented by KLass::java_super: 522 // arrays return Object 523 // interfaces return NULL 524 // proper classes return Klass::super() 525 Klass* k = java_lang_Class::as_Klass(mirror); 526 if (k->is_interface()) return NULL; 527 528 // return mirror for superclass 529 Klass* super = k->java_super(); 530 // super2 is the value computed by the compiler's getSuperClass intrinsic: 531 debug_only(Klass* super2 = ( k->is_array_klass() 532 ? SystemDictionary::Object_klass() 533 : k->super() ) ); 534 assert(super == super2, 535 "java_super computation depends on interface, array, other super"); 536 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(THREAD, super->java_mirror()); 537 return obj; 538 JNI_END 539 540 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 541 JNIWrapper("IsSubclassOf"); 542 543 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 544 545 oop sub_mirror = JNIHandles::resolve_non_null(sub); 546 oop super_mirror = JNIHandles::resolve_non_null(super); 547 if (java_lang_Class::is_primitive(sub_mirror) || 548 java_lang_Class::is_primitive(super_mirror)) { 549 jboolean ret = (sub_mirror == super_mirror); 550 551 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 552 return ret; 553 } 554 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 555 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 556 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 557 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 558 JNI_TRUE : JNI_FALSE; 559 560 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 561 return ret; 562 JNI_END 563 564 565 DT_RETURN_MARK_DECL(Throw, jint 566 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 567 568 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 569 JNIWrapper("Throw"); 570 571 HOTSPOT_JNI_THROW_ENTRY(env, obj); 572 573 jint ret = JNI_OK; 574 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 575 576 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 577 ShouldNotReachHere(); 578 return 0; // Mute compiler. 579 JNI_END 580 581 582 DT_RETURN_MARK_DECL(ThrowNew, jint 583 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 584 585 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 586 JNIWrapper("ThrowNew"); 587 588 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 589 590 jint ret = JNI_OK; 591 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 592 593 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 594 Symbol* name = k->name(); 595 Handle class_loader (THREAD, k->class_loader()); 596 Handle protection_domain (THREAD, k->protection_domain()); 597 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 598 ShouldNotReachHere(); 599 return 0; // Mute compiler. 600 JNI_END 601 602 603 // JNI functions only transform a pending async exception to a synchronous 604 // exception in ExceptionOccurred and ExceptionCheck calls, since 605 // delivering an async exception in other places won't change the native 606 // code's control flow and would be harmful when native code further calls 607 // JNI functions with a pending exception. Async exception is also checked 608 // during the call, so ExceptionOccurred/ExceptionCheck won't return 609 // false but deliver the async exception at the very end during 610 // state transition. 611 612 static void jni_check_async_exceptions(JavaThread *thread) { 613 assert(thread == Thread::current(), "must be itself"); 614 thread->check_and_handle_async_exceptions(); 615 } 616 617 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 618 JNIWrapper("ExceptionOccurred"); 619 620 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 621 622 jni_check_async_exceptions(thread); 623 oop exception = thread->pending_exception(); 624 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception); 625 626 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 627 return ret; 628 JNI_END 629 630 631 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 632 JNIWrapper("ExceptionDescribe"); 633 634 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 635 636 if (thread->has_pending_exception()) { 637 Handle ex(thread, thread->pending_exception()); 638 thread->clear_pending_exception(); 639 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 640 // Don't print anything if we are being killed. 641 } else { 642 jio_fprintf(defaultStream::error_stream(), "Exception "); 643 if (thread != NULL && thread->threadObj() != NULL) { 644 ResourceMark rm(THREAD); 645 jio_fprintf(defaultStream::error_stream(), 646 "in thread \"%s\" ", thread->get_thread_name()); 647 } 648 if (ex->is_a(SystemDictionary::Throwable_klass())) { 649 JavaValue result(T_VOID); 650 JavaCalls::call_virtual(&result, 651 ex, 652 SystemDictionary::Throwable_klass(), 653 vmSymbols::printStackTrace_name(), 654 vmSymbols::void_method_signature(), 655 THREAD); 656 // If an exception is thrown in the call it gets thrown away. Not much 657 // we can do with it. The native code that calls this, does not check 658 // for the exception - hence, it might still be in the thread when DestroyVM gets 659 // called, potentially causing a few asserts to trigger - since no pending exception 660 // is expected. 661 CLEAR_PENDING_EXCEPTION; 662 } else { 663 ResourceMark rm(THREAD); 664 jio_fprintf(defaultStream::error_stream(), 665 ". Uncaught exception of type %s.", 666 ex->klass()->external_name()); 667 } 668 } 669 } 670 671 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 672 JNI_END 673 674 675 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env)) 676 JNIWrapper("ExceptionClear"); 677 678 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 679 680 // The jni code might be using this API to clear java thrown exception. 681 // So just mark jvmti thread exception state as exception caught. 682 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 683 if (state != NULL && state->is_exception_detected()) { 684 state->set_exception_caught(); 685 } 686 thread->clear_pending_exception(); 687 688 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 689 JNI_END 690 691 692 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 693 JNIWrapper("FatalError"); 694 695 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 696 697 tty->print_cr("FATAL ERROR in native method: %s", msg); 698 thread->print_stack(); 699 os::abort(); // Dump core and abort 700 JNI_END 701 702 703 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 704 JNIWrapper("PushLocalFrame"); 705 706 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 707 708 //%note jni_11 709 if (capacity < 0 || 710 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 711 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 712 return JNI_ERR; 713 } 714 JNIHandleBlock* old_handles = thread->active_handles(); 715 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 716 assert(new_handles != NULL, "should not be NULL"); 717 new_handles->set_pop_frame_link(old_handles); 718 thread->set_active_handles(new_handles); 719 jint ret = JNI_OK; 720 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 721 return ret; 722 JNI_END 723 724 725 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 726 JNIWrapper("PopLocalFrame"); 727 728 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 729 730 //%note jni_11 731 Handle result_handle(thread, JNIHandles::resolve(result)); 732 JNIHandleBlock* old_handles = thread->active_handles(); 733 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 734 if (new_handles != NULL) { 735 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 736 // This way code will still work if PopLocalFrame is called without a corresponding 737 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 738 // the release_block call will release the blocks. 739 thread->set_active_handles(new_handles); 740 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 741 JNIHandleBlock::release_block(old_handles, thread); // may block 742 result = JNIHandles::make_local(thread, result_handle()); 743 } 744 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 745 return result; 746 JNI_END 747 748 749 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 750 JNIWrapper("NewGlobalRef"); 751 752 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 753 754 Handle ref_handle(thread, JNIHandles::resolve(ref)); 755 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL); 756 757 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 758 return ret; 759 JNI_END 760 761 // Must be JNI_ENTRY (with HandleMark) 762 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 763 JNIWrapper("DeleteGlobalRef"); 764 765 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 766 767 JNIHandles::destroy_global(ref); 768 769 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 770 JNI_END 771 772 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 773 JNIWrapper("DeleteLocalRef"); 774 775 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 776 777 JNIHandles::destroy_local(obj); 778 779 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 780 JNI_END 781 782 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 783 JNIWrapper("IsSameObject"); 784 785 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 786 787 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 788 789 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 790 return ret; 791 JNI_END 792 793 794 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 795 JNIWrapper("NewLocalRef"); 796 797 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 798 799 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref), 800 AllocFailStrategy::RETURN_NULL); 801 802 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 803 return ret; 804 JNI_END 805 806 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 807 JNIWrapper("EnsureLocalCapacity"); 808 809 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 810 811 jint ret; 812 if (capacity >= 0 && 813 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 814 ret = JNI_OK; 815 } else { 816 ret = JNI_ERR; 817 } 818 819 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 820 return ret; 821 JNI_END 822 823 // Return the Handle Type 824 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 825 JNIWrapper("GetObjectRefType"); 826 827 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 828 829 jobjectRefType ret = JNIInvalidRefType; 830 if (obj != NULL) { 831 ret = JNIHandles::handle_type(thread, obj); 832 } 833 834 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 835 return ret; 836 JNI_END 837 838 839 class JNI_ArgumentPusher : public SignatureIterator { 840 protected: 841 JavaCallArguments* _arguments; 842 843 void push_int(jint x) { _arguments->push_int(x); } 844 void push_long(jlong x) { _arguments->push_long(x); } 845 void push_float(jfloat x) { _arguments->push_float(x); } 846 void push_double(jdouble x) { _arguments->push_double(x); } 847 void push_object(jobject x) { _arguments->push_jobject(x); } 848 849 void push_boolean(jboolean b) { 850 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 851 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 852 // TemplateInterpreterGenerator::generate_result_handler_for and 853 // SharedRuntime::generate_native_wrapper. 854 push_int(b == 0 ? JNI_FALSE : JNI_TRUE); 855 } 856 857 JNI_ArgumentPusher(Method* method) 858 : SignatureIterator(method->signature(), 859 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint()) 860 { 861 _arguments = NULL; 862 } 863 864 public: 865 virtual void push_arguments_on(JavaCallArguments* arguments) = 0; 866 }; 867 868 869 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 870 protected: 871 va_list _ap; 872 873 void set_ap(va_list rap) { 874 va_copy(_ap, rap); 875 } 876 877 friend class SignatureIterator; // so do_parameters_on can call do_type 878 void do_type(BasicType type) { 879 switch (type) { 880 // these are coerced to int when using va_arg 881 case T_BYTE: 882 case T_CHAR: 883 case T_SHORT: 884 case T_INT: push_int(va_arg(_ap, jint)); break; 885 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break; 886 887 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 888 889 case T_LONG: push_long(va_arg(_ap, jlong)); break; 890 // float is coerced to double w/ va_arg 891 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break; 892 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break; 893 894 case T_ARRAY: 895 case T_OBJECT: push_object(va_arg(_ap, jobject)); break; 896 default: ShouldNotReachHere(); 897 } 898 } 899 900 public: 901 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 902 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 903 set_ap(rap); 904 } 905 906 virtual void push_arguments_on(JavaCallArguments* arguments) { 907 _arguments = arguments; 908 do_parameters_on(this); 909 } 910 }; 911 912 913 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 914 protected: 915 const jvalue *_ap; 916 917 inline void set_ap(const jvalue *rap) { _ap = rap; } 918 919 friend class SignatureIterator; // so do_parameters_on can call do_type 920 void do_type(BasicType type) { 921 switch (type) { 922 case T_CHAR: push_int((_ap++)->c); break; 923 case T_SHORT: push_int((_ap++)->s); break; 924 case T_BYTE: push_int((_ap++)->b); break; 925 case T_INT: push_int((_ap++)->i); break; 926 case T_BOOLEAN: push_boolean((_ap++)->z); break; 927 case T_LONG: push_long((_ap++)->j); break; 928 case T_FLOAT: push_float((_ap++)->f); break; 929 case T_DOUBLE: push_double((_ap++)->d); break; 930 case T_ARRAY: 931 case T_OBJECT: push_object((_ap++)->l); break; 932 default: ShouldNotReachHere(); 933 } 934 } 935 936 public: 937 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 938 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 939 set_ap(rap); 940 } 941 942 virtual void push_arguments_on(JavaCallArguments* arguments) { 943 _arguments = arguments; 944 do_parameters_on(this); 945 } 946 }; 947 948 949 enum JNICallType { 950 JNI_STATIC, 951 JNI_VIRTUAL, 952 JNI_NONVIRTUAL 953 }; 954 955 956 957 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 958 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 959 960 // Create object to hold arguments for the JavaCall, and associate it with 961 // the jni parser 962 ResourceMark rm(THREAD); 963 int number_of_parameters = method->size_of_parameters(); 964 JavaCallArguments java_args(number_of_parameters); 965 966 assert(method->is_static(), "method should be static"); 967 968 // Fill out JavaCallArguments object 969 args->push_arguments_on(&java_args); 970 // Initialize result type 971 result->set_type(args->return_type()); 972 973 // Invoke the method. Result is returned as oop. 974 JavaCalls::call(result, method, &java_args, CHECK); 975 976 // Convert result 977 if (is_reference_type(result->get_type())) { 978 result->set_jobject(JNIHandles::make_local(THREAD, (oop) result->get_jobject())); 979 } 980 } 981 982 983 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 984 oop recv = JNIHandles::resolve(receiver); 985 if (recv == NULL) { 986 THROW(vmSymbols::java_lang_NullPointerException()); 987 } 988 Handle h_recv(THREAD, recv); 989 990 int number_of_parameters; 991 Method* selected_method; 992 { 993 Method* m = Method::resolve_jmethod_id(method_id); 994 number_of_parameters = m->size_of_parameters(); 995 Klass* holder = m->method_holder(); 996 if (call_type != JNI_VIRTUAL) { 997 selected_method = m; 998 } else if (!m->has_itable_index()) { 999 // non-interface call -- for that little speed boost, don't handlize 1000 debug_only(NoSafepointVerifier nosafepoint;) 1001 // jni_GetMethodID makes sure class is linked and initialized 1002 // so m should have a valid vtable index. 1003 assert(m->valid_vtable_index(), "no valid vtable index"); 1004 int vtbl_index = m->vtable_index(); 1005 if (vtbl_index != Method::nonvirtual_vtable_index) { 1006 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1007 } else { 1008 // final method 1009 selected_method = m; 1010 } 1011 } else { 1012 // interface call 1013 int itbl_index = m->itable_index(); 1014 Klass* k = h_recv->klass(); 1015 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1016 } 1017 } 1018 1019 methodHandle method(THREAD, selected_method); 1020 1021 // Create object to hold arguments for the JavaCall, and associate it with 1022 // the jni parser 1023 ResourceMark rm(THREAD); 1024 JavaCallArguments java_args(number_of_parameters); 1025 1026 // handle arguments 1027 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1028 java_args.push_oop(h_recv); // Push jobject handle 1029 1030 // Fill out JavaCallArguments object 1031 args->push_arguments_on(&java_args); 1032 // Initialize result type 1033 result->set_type(args->return_type()); 1034 1035 // Invoke the method. Result is returned as oop. 1036 JavaCalls::call(result, method, &java_args, CHECK); 1037 1038 // Convert result 1039 if (is_reference_type(result->get_type())) { 1040 result->set_jobject(JNIHandles::make_local(THREAD, (oop) result->get_jobject())); 1041 } 1042 } 1043 1044 DT_RETURN_MARK_DECL(AllocObject, jobject 1045 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1046 1047 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1048 JNIWrapper("AllocObject"); 1049 1050 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1051 1052 jobject ret = NULL; 1053 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1054 1055 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1056 ret = JNIHandles::make_local(THREAD, i); 1057 return ret; 1058 JNI_END 1059 1060 DT_RETURN_MARK_DECL(NewObjectA, jobject 1061 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1062 1063 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1064 JNIWrapper("NewObjectA"); 1065 1066 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1067 1068 jobject obj = NULL; 1069 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1070 1071 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1072 obj = JNIHandles::make_local(THREAD, i); 1073 JavaValue jvalue(T_VOID); 1074 JNI_ArgumentPusherArray ap(methodID, args); 1075 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1076 return obj; 1077 JNI_END 1078 1079 1080 DT_RETURN_MARK_DECL(NewObjectV, jobject 1081 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1082 1083 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1084 JNIWrapper("NewObjectV"); 1085 1086 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1087 1088 jobject obj = NULL; 1089 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1090 1091 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1092 obj = JNIHandles::make_local(THREAD, i); 1093 JavaValue jvalue(T_VOID); 1094 JNI_ArgumentPusherVaArg ap(methodID, args); 1095 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1096 return obj; 1097 JNI_END 1098 1099 1100 DT_RETURN_MARK_DECL(NewObject, jobject 1101 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1102 1103 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1104 JNIWrapper("NewObject"); 1105 1106 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1107 1108 jobject obj = NULL; 1109 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1110 1111 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1112 obj = JNIHandles::make_local(THREAD, i); 1113 va_list args; 1114 va_start(args, methodID); 1115 JavaValue jvalue(T_VOID); 1116 JNI_ArgumentPusherVaArg ap(methodID, args); 1117 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1118 va_end(args); 1119 return obj; 1120 JNI_END 1121 1122 1123 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1124 JNIWrapper("GetObjectClass"); 1125 1126 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1127 1128 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1129 jclass ret = 1130 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1131 1132 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1133 return ret; 1134 JNI_END 1135 1136 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1137 JNIWrapper("IsInstanceOf"); 1138 1139 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1140 1141 jboolean ret = JNI_TRUE; 1142 if (obj != NULL) { 1143 ret = JNI_FALSE; 1144 Klass* k = java_lang_Class::as_Klass( 1145 JNIHandles::resolve_non_null(clazz)); 1146 if (k != NULL) { 1147 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1148 } 1149 } 1150 1151 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1152 return ret; 1153 JNI_END 1154 1155 1156 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1157 const char *sig, bool is_static, TRAPS) { 1158 // %%%% This code should probably just call into a method in the LinkResolver 1159 // 1160 // The class should have been loaded (we have an instance of the class 1161 // passed in) so the method and signature should already be in the symbol 1162 // table. If they're not there, the method doesn't exist. 1163 const char *name_to_probe = (name_str == NULL) 1164 ? vmSymbols::object_initializer_name()->as_C_string() 1165 : name_str; 1166 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1167 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1168 1169 if (name == NULL || signature == NULL) { 1170 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1171 } 1172 1173 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1174 1175 // Throw a NoSuchMethodError exception if we have an instance of a 1176 // primitive java.lang.Class 1177 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1178 ResourceMark rm; 1179 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1180 } 1181 1182 // Make sure class is linked and initialized before handing id's out to 1183 // Method*s. 1184 klass->initialize(CHECK_NULL); 1185 1186 Method* m; 1187 if (name == vmSymbols::object_initializer_name() || 1188 name == vmSymbols::class_initializer_name()) { 1189 // Never search superclasses for constructors 1190 if (klass->is_instance_klass()) { 1191 m = InstanceKlass::cast(klass)->find_method(name, signature); 1192 } else { 1193 m = NULL; 1194 } 1195 } else { 1196 m = klass->lookup_method(name, signature); 1197 if (m == NULL && klass->is_instance_klass()) { 1198 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1199 } 1200 } 1201 if (m == NULL || (m->is_static() != is_static)) { 1202 ResourceMark rm; 1203 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1204 } 1205 return m->jmethod_id(); 1206 } 1207 1208 1209 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1210 const char *name, const char *sig)) 1211 JNIWrapper("GetMethodID"); 1212 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1213 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1214 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1215 return ret; 1216 JNI_END 1217 1218 1219 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1220 const char *name, const char *sig)) 1221 JNIWrapper("GetStaticMethodID"); 1222 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1223 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1224 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1225 return ret; 1226 JNI_END 1227 1228 1229 1230 // 1231 // Calling Methods 1232 // 1233 1234 1235 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1236 , EntryProbe, ReturnProbe) \ 1237 \ 1238 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1239 , ReturnProbe); \ 1240 \ 1241 JNI_ENTRY(ResultType, \ 1242 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1243 JNIWrapper("Call" XSTR(Result) "Method"); \ 1244 \ 1245 EntryProbe; \ 1246 ResultType ret = 0;\ 1247 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1248 (const ResultType&)ret);\ 1249 \ 1250 va_list args; \ 1251 va_start(args, methodID); \ 1252 JavaValue jvalue(Tag); \ 1253 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1254 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1255 va_end(args); \ 1256 ret = jvalue.get_##ResultType(); \ 1257 return ret;\ 1258 JNI_END 1259 1260 // the runtime type of subword integral basic types is integer 1261 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1262 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1263 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1264 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1265 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1266 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1267 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1268 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1269 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1270 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1271 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1272 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1273 1274 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1275 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1276 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1277 DEFINE_CALLMETHOD(jint, Int, T_INT, 1278 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1279 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1280 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1281 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1282 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1283 // Float and double probes don't return value because dtrace doesn't currently support it 1284 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1285 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1286 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1287 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1288 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1289 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1290 1291 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1292 , EntryProbe, ReturnProbe) \ 1293 \ 1294 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1295 , ReturnProbe); \ 1296 \ 1297 JNI_ENTRY(ResultType, \ 1298 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1299 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1300 \ 1301 EntryProbe;\ 1302 ResultType ret = 0;\ 1303 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1304 (const ResultType&)ret);\ 1305 \ 1306 JavaValue jvalue(Tag); \ 1307 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1308 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1309 ret = jvalue.get_##ResultType(); \ 1310 return ret;\ 1311 JNI_END 1312 1313 // the runtime type of subword integral basic types is integer 1314 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1315 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1316 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1317 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1318 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1319 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1320 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1321 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1322 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1323 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1324 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1325 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1326 1327 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1328 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1329 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1330 DEFINE_CALLMETHODV(jint, Int, T_INT, 1331 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1332 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1333 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1334 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1335 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1336 // Float and double probes don't return value because dtrace doesn't currently support it 1337 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1338 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1339 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1340 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1341 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1342 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1343 1344 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1345 , EntryProbe, ReturnProbe) \ 1346 \ 1347 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1348 , ReturnProbe); \ 1349 \ 1350 JNI_ENTRY(ResultType, \ 1351 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1352 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1353 EntryProbe; \ 1354 ResultType ret = 0;\ 1355 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1356 (const ResultType&)ret);\ 1357 \ 1358 JavaValue jvalue(Tag); \ 1359 JNI_ArgumentPusherArray ap(methodID, args); \ 1360 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1361 ret = jvalue.get_##ResultType(); \ 1362 return ret;\ 1363 JNI_END 1364 1365 // the runtime type of subword integral basic types is integer 1366 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1367 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1368 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1369 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1370 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1371 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1372 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1373 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1374 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1375 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1376 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1377 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1378 1379 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1380 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1381 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1382 DEFINE_CALLMETHODA(jint, Int, T_INT, 1383 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1384 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1385 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1386 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1387 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1388 // Float and double probes don't return value because dtrace doesn't currently support it 1389 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1390 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1391 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1392 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1393 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1394 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1395 1396 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1397 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1398 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1399 1400 1401 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1402 JNIWrapper("CallVoidMethod"); 1403 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1404 DT_VOID_RETURN_MARK(CallVoidMethod); 1405 1406 va_list args; 1407 va_start(args, methodID); 1408 JavaValue jvalue(T_VOID); 1409 JNI_ArgumentPusherVaArg ap(methodID, args); 1410 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1411 va_end(args); 1412 JNI_END 1413 1414 1415 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1416 JNIWrapper("CallVoidMethodV"); 1417 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1418 DT_VOID_RETURN_MARK(CallVoidMethodV); 1419 1420 JavaValue jvalue(T_VOID); 1421 JNI_ArgumentPusherVaArg ap(methodID, args); 1422 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1423 JNI_END 1424 1425 1426 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1427 JNIWrapper("CallVoidMethodA"); 1428 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1429 DT_VOID_RETURN_MARK(CallVoidMethodA); 1430 1431 JavaValue jvalue(T_VOID); 1432 JNI_ArgumentPusherArray ap(methodID, args); 1433 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1434 JNI_END 1435 1436 1437 1438 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1439 , EntryProbe, ReturnProbe) \ 1440 \ 1441 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1442 , ReturnProbe);\ 1443 \ 1444 JNI_ENTRY(ResultType, \ 1445 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1446 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1447 \ 1448 EntryProbe;\ 1449 ResultType ret;\ 1450 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1451 (const ResultType&)ret);\ 1452 \ 1453 va_list args; \ 1454 va_start(args, methodID); \ 1455 JavaValue jvalue(Tag); \ 1456 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1457 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1458 va_end(args); \ 1459 ret = jvalue.get_##ResultType(); \ 1460 return ret;\ 1461 JNI_END 1462 1463 // the runtime type of subword integral basic types is integer 1464 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1465 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1466 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1467 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1468 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1469 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1470 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1471 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1472 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1473 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1474 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1475 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1476 1477 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1478 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1480 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1481 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1482 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1483 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1484 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1485 // Float and double probes don't return value because dtrace doesn't currently support it 1486 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1487 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1488 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1489 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1490 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1491 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1492 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1493 1494 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1495 , EntryProbe, ReturnProbe) \ 1496 \ 1497 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1498 , ReturnProbe);\ 1499 \ 1500 JNI_ENTRY(ResultType, \ 1501 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1502 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1503 \ 1504 EntryProbe;\ 1505 ResultType ret;\ 1506 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1507 (const ResultType&)ret);\ 1508 \ 1509 JavaValue jvalue(Tag); \ 1510 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1511 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1512 ret = jvalue.get_##ResultType(); \ 1513 return ret;\ 1514 JNI_END 1515 1516 // the runtime type of subword integral basic types is integer 1517 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1518 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1519 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1520 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1521 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1522 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1523 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1524 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1525 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1526 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1527 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1529 1530 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1531 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1533 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1534 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1536 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1537 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1538 // Float and double probes don't return value because dtrace doesn't currently support it 1539 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1540 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1541 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1543 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1544 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1546 1547 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1548 , EntryProbe, ReturnProbe) \ 1549 \ 1550 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1551 , ReturnProbe);\ 1552 \ 1553 JNI_ENTRY(ResultType, \ 1554 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1555 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1556 \ 1557 EntryProbe;\ 1558 ResultType ret;\ 1559 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1560 (const ResultType&)ret);\ 1561 \ 1562 JavaValue jvalue(Tag); \ 1563 JNI_ArgumentPusherArray ap(methodID, args); \ 1564 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1565 ret = jvalue.get_##ResultType(); \ 1566 return ret;\ 1567 JNI_END 1568 1569 // the runtime type of subword integral basic types is integer 1570 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1571 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1572 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1573 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1574 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1575 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1576 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1577 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1578 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1579 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1580 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1581 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1582 1583 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1584 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1585 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1586 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1587 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1588 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1589 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1590 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1591 // Float and double probes don't return value because dtrace doesn't currently support it 1592 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1593 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1594 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1595 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1596 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1597 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1598 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1599 1600 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1601 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1602 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1603 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1604 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1605 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1606 1607 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1608 JNIWrapper("CallNonvirtualVoidMethod"); 1609 1610 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1611 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1612 1613 va_list args; 1614 va_start(args, methodID); 1615 JavaValue jvalue(T_VOID); 1616 JNI_ArgumentPusherVaArg ap(methodID, args); 1617 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1618 va_end(args); 1619 JNI_END 1620 1621 1622 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1623 JNIWrapper("CallNonvirtualVoidMethodV"); 1624 1625 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1626 env, obj, cls, (uintptr_t) methodID); 1627 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1628 1629 JavaValue jvalue(T_VOID); 1630 JNI_ArgumentPusherVaArg ap(methodID, args); 1631 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1632 JNI_END 1633 1634 1635 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1636 JNIWrapper("CallNonvirtualVoidMethodA"); 1637 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1638 env, obj, cls, (uintptr_t) methodID); 1639 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1640 JavaValue jvalue(T_VOID); 1641 JNI_ArgumentPusherArray ap(methodID, args); 1642 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1643 JNI_END 1644 1645 1646 1647 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1648 , EntryProbe, ResultProbe) \ 1649 \ 1650 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1651 , ResultProbe); \ 1652 \ 1653 JNI_ENTRY(ResultType, \ 1654 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1655 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1656 \ 1657 EntryProbe; \ 1658 ResultType ret = 0;\ 1659 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1660 (const ResultType&)ret);\ 1661 \ 1662 va_list args; \ 1663 va_start(args, methodID); \ 1664 JavaValue jvalue(Tag); \ 1665 JNI_ArgumentPusherVaArg ap(methodID, args); \ 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_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1674 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1675 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1676 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1677 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1678 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1679 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1680 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1681 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1682 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1683 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1684 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1685 1686 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1687 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1689 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1690 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1691 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1692 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1693 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1694 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1695 // Float and double probes don't return value because dtrace doesn't currently support it 1696 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1697 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1698 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1699 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1700 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1701 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1702 1703 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1704 , EntryProbe, ResultProbe) \ 1705 \ 1706 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1707 , ResultProbe); \ 1708 \ 1709 JNI_ENTRY(ResultType, \ 1710 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1711 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1712 \ 1713 EntryProbe; \ 1714 ResultType ret = 0;\ 1715 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1716 (const ResultType&)ret);\ 1717 \ 1718 JavaValue jvalue(Tag); \ 1719 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1720 /* Make sure class is initialized before trying to invoke its method */ \ 1721 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1722 k->initialize(CHECK_0); \ 1723 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1724 va_end(args); \ 1725 ret = jvalue.get_##ResultType(); \ 1726 return ret;\ 1727 JNI_END 1728 1729 // the runtime type of subword integral basic types is integer 1730 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1731 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1732 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1733 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1734 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1735 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1736 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1737 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1738 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1739 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1740 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1741 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1742 1743 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1744 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1745 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1746 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1747 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1748 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1749 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1750 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1751 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1752 // Float and double probes don't return value because dtrace doesn't currently support it 1753 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1754 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1755 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1756 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1757 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1758 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1759 1760 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1761 , EntryProbe, ResultProbe) \ 1762 \ 1763 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1764 , ResultProbe); \ 1765 \ 1766 JNI_ENTRY(ResultType, \ 1767 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1768 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1769 \ 1770 EntryProbe; \ 1771 ResultType ret = 0;\ 1772 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1773 (const ResultType&)ret);\ 1774 \ 1775 JavaValue jvalue(Tag); \ 1776 JNI_ArgumentPusherArray ap(methodID, args); \ 1777 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1778 ret = jvalue.get_##ResultType(); \ 1779 return ret;\ 1780 JNI_END 1781 1782 // the runtime type of subword integral basic types is integer 1783 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1784 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1785 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1786 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1787 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1788 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1789 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1790 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1791 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1792 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1793 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1794 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1795 1796 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1797 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1798 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1799 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1800 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1801 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1802 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1803 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1804 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1805 // Float and double probes don't return value because dtrace doesn't currently support it 1806 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1807 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1808 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1809 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1810 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1811 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1812 1813 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1814 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1815 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1816 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1817 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1818 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1819 1820 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1821 JNIWrapper("CallStaticVoidMethod"); 1822 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1823 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1824 1825 va_list args; 1826 va_start(args, methodID); 1827 JavaValue jvalue(T_VOID); 1828 JNI_ArgumentPusherVaArg ap(methodID, args); 1829 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1830 va_end(args); 1831 JNI_END 1832 1833 1834 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1835 JNIWrapper("CallStaticVoidMethodV"); 1836 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1837 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1838 1839 JavaValue jvalue(T_VOID); 1840 JNI_ArgumentPusherVaArg ap(methodID, args); 1841 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1842 JNI_END 1843 1844 1845 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1846 JNIWrapper("CallStaticVoidMethodA"); 1847 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1848 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1849 1850 JavaValue jvalue(T_VOID); 1851 JNI_ArgumentPusherArray ap(methodID, args); 1852 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1853 JNI_END 1854 1855 1856 // 1857 // Accessing Fields 1858 // 1859 1860 1861 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1862 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1863 1864 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1865 const char *name, const char *sig)) 1866 JNIWrapper("GetFieldID"); 1867 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1868 jfieldID ret = 0; 1869 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1870 1871 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1872 1873 // The class should have been loaded (we have an instance of the class 1874 // passed in) so the field and signature should already be in the symbol 1875 // table. If they're not there, the field doesn't exist. 1876 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1877 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1878 if (fieldname == NULL || signame == NULL) { 1879 ResourceMark rm; 1880 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1881 } 1882 1883 // Make sure class is initialized before handing id's out to fields 1884 k->initialize(CHECK_NULL); 1885 1886 fieldDescriptor fd; 1887 if (!k->is_instance_klass() || 1888 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1889 ResourceMark rm; 1890 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1891 } 1892 1893 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1894 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1895 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 1896 return ret; 1897 JNI_END 1898 1899 1900 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1901 JNIWrapper("GetObjectField"); 1902 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1903 oop o = JNIHandles::resolve_non_null(obj); 1904 Klass* k = o->klass(); 1905 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1906 // Keep JVMTI addition small and only check enabled flag here. 1907 // jni_GetField_probe() assumes that is okay to create handles. 1908 if (JvmtiExport::should_post_field_access()) { 1909 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1910 } 1911 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1912 jobject ret = JNIHandles::make_local(THREAD, loaded_obj); 1913 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1914 return ret; 1915 JNI_END 1916 1917 1918 1919 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1920 , EntryProbe, ReturnProbe) \ 1921 \ 1922 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1923 , ReturnProbe); \ 1924 \ 1925 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1926 JNIWrapper("Get" XSTR(Result) "Field"); \ 1927 \ 1928 EntryProbe; \ 1929 Return ret = 0;\ 1930 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1931 \ 1932 oop o = JNIHandles::resolve_non_null(obj); \ 1933 Klass* k = o->klass(); \ 1934 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1935 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1936 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 1937 /* and creates a ResetNoHandleMark. */ \ 1938 if (JvmtiExport::should_post_field_access()) { \ 1939 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 1940 } \ 1941 ret = o->Fieldname##_field(offset); \ 1942 return ret; \ 1943 JNI_END 1944 1945 DEFINE_GETFIELD(jboolean, bool, Boolean 1946 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1947 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1948 DEFINE_GETFIELD(jbyte, byte, Byte 1949 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1950 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1951 DEFINE_GETFIELD(jchar, char, Char 1952 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1953 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1954 DEFINE_GETFIELD(jshort, short, Short 1955 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1956 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1957 DEFINE_GETFIELD(jint, int, Int 1958 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1959 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1960 DEFINE_GETFIELD(jlong, long, Long 1961 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1962 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1963 // Float and double probes don't return value because dtrace doesn't currently support it 1964 DEFINE_GETFIELD(jfloat, float, Float 1965 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1966 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1967 DEFINE_GETFIELD(jdouble, double, Double 1968 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1969 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1970 1971 address jni_GetBooleanField_addr() { 1972 return (address)jni_GetBooleanField; 1973 } 1974 address jni_GetByteField_addr() { 1975 return (address)jni_GetByteField; 1976 } 1977 address jni_GetCharField_addr() { 1978 return (address)jni_GetCharField; 1979 } 1980 address jni_GetShortField_addr() { 1981 return (address)jni_GetShortField; 1982 } 1983 address jni_GetIntField_addr() { 1984 return (address)jni_GetIntField; 1985 } 1986 address jni_GetLongField_addr() { 1987 return (address)jni_GetLongField; 1988 } 1989 address jni_GetFloatField_addr() { 1990 return (address)jni_GetFloatField; 1991 } 1992 address jni_GetDoubleField_addr() { 1993 return (address)jni_GetDoubleField; 1994 } 1995 1996 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1997 JNIWrapper("SetObjectField"); 1998 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 1999 oop o = JNIHandles::resolve_non_null(obj); 2000 Klass* k = o->klass(); 2001 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2002 // Keep JVMTI addition small and only check enabled flag here. 2003 // jni_SetField_probe_nh() assumes that is not okay to create handles 2004 // and creates a ResetNoHandleMark. 2005 if (JvmtiExport::should_post_field_modification()) { 2006 jvalue field_value; 2007 field_value.l = value; 2008 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2009 } 2010 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2011 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2012 JNI_END 2013 2014 2015 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2016 , EntryProbe, ReturnProbe) \ 2017 \ 2018 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2019 JNIWrapper("Set" XSTR(Result) "Field"); \ 2020 \ 2021 EntryProbe; \ 2022 \ 2023 oop o = JNIHandles::resolve_non_null(obj); \ 2024 Klass* k = o->klass(); \ 2025 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2026 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2027 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2028 /* and creates a ResetNoHandleMark. */ \ 2029 if (JvmtiExport::should_post_field_modification()) { \ 2030 jvalue field_value; \ 2031 field_value.unionType = value; \ 2032 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2033 } \ 2034 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 2035 o->Fieldname##_field_put(offset, value); \ 2036 ReturnProbe; \ 2037 JNI_END 2038 2039 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2040 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2041 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2042 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2043 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2044 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2045 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2046 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2047 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2048 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2049 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2050 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2051 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2052 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2053 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2054 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2055 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2056 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2057 // Float and double probes don't return value because dtrace doesn't currently support it 2058 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2059 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2060 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2061 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2062 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2063 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2064 2065 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2066 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2067 2068 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2069 JNIWrapper("ToReflectedField"); 2070 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2071 jobject ret = NULL; 2072 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2073 2074 fieldDescriptor fd; 2075 bool found = false; 2076 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2077 2078 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2079 2080 if (isStatic) { 2081 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2082 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2083 assert(id->is_static_field_id(), "invalid static field id"); 2084 found = id->find_local_field(&fd); 2085 } else { 2086 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2087 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2088 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2089 } 2090 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2091 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2092 ret = JNIHandles::make_local(THREAD, reflected); 2093 return ret; 2094 JNI_END 2095 2096 2097 // 2098 // Accessing Static Fields 2099 // 2100 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2101 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2102 2103 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2104 const char *name, const char *sig)) 2105 JNIWrapper("GetStaticFieldID"); 2106 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2107 jfieldID ret = NULL; 2108 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2109 2110 // The class should have been loaded (we have an instance of the class 2111 // passed in) so the field and signature should already be in the symbol 2112 // table. If they're not there, the field doesn't exist. 2113 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2114 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2115 if (fieldname == NULL || signame == NULL) { 2116 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2117 } 2118 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2119 // Make sure class is initialized before handing id's out to static fields 2120 k->initialize(CHECK_NULL); 2121 2122 fieldDescriptor fd; 2123 if (!k->is_instance_klass() || 2124 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2125 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2126 } 2127 2128 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2129 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2130 debug_only(id->set_is_static_field_id();) 2131 2132 debug_only(id->verify(fd.field_holder())); 2133 2134 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2135 return ret; 2136 JNI_END 2137 2138 2139 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2140 JNIWrapper("GetStaticObjectField"); 2141 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2142 #if INCLUDE_JNI_CHECK 2143 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2144 #endif // INCLUDE_JNI_CHECK 2145 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2146 assert(id->is_static_field_id(), "invalid static field id"); 2147 // Keep JVMTI addition small and only check enabled flag here. 2148 // jni_GetField_probe() assumes that is okay to create handles. 2149 if (JvmtiExport::should_post_field_access()) { 2150 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2151 } 2152 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2153 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2154 return ret; 2155 JNI_END 2156 2157 2158 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2159 , EntryProbe, ReturnProbe) \ 2160 \ 2161 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2162 , ReturnProbe); \ 2163 \ 2164 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2165 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2166 EntryProbe; \ 2167 Return ret = 0;\ 2168 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2169 (const Return&)ret);\ 2170 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2171 assert(id->is_static_field_id(), "invalid static field id"); \ 2172 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2173 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2174 if (JvmtiExport::should_post_field_access()) { \ 2175 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2176 } \ 2177 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2178 return ret;\ 2179 JNI_END 2180 2181 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2182 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2183 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2184 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2185 DEFINE_GETSTATICFIELD(jchar, char, Char 2186 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2187 DEFINE_GETSTATICFIELD(jshort, short, Short 2188 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2189 DEFINE_GETSTATICFIELD(jint, int, Int 2190 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2191 DEFINE_GETSTATICFIELD(jlong, long, Long 2192 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2193 // Float and double probes don't return value because dtrace doesn't currently support it 2194 DEFINE_GETSTATICFIELD(jfloat, float, Float 2195 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2196 DEFINE_GETSTATICFIELD(jdouble, double, Double 2197 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2198 2199 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2200 JNIWrapper("SetStaticObjectField"); 2201 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2202 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2203 assert(id->is_static_field_id(), "invalid static field id"); 2204 // Keep JVMTI addition small and only check enabled flag here. 2205 // jni_SetField_probe() assumes that is okay to create handles. 2206 if (JvmtiExport::should_post_field_modification()) { 2207 jvalue field_value; 2208 field_value.l = value; 2209 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2210 } 2211 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2212 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2213 JNI_END 2214 2215 2216 2217 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2218 , EntryProbe, ReturnProbe) \ 2219 \ 2220 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2221 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2222 EntryProbe; \ 2223 \ 2224 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2225 assert(id->is_static_field_id(), "invalid static field id"); \ 2226 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2227 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2228 if (JvmtiExport::should_post_field_modification()) { \ 2229 jvalue field_value; \ 2230 field_value.unionType = value; \ 2231 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2232 } \ 2233 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 2234 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2235 ReturnProbe;\ 2236 JNI_END 2237 2238 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2239 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2240 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2241 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2242 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2243 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2244 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2245 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2246 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2247 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2248 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2249 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2250 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2251 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2252 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2253 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2254 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2255 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2256 // Float and double probes don't return value because dtrace doesn't currently support it 2257 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2258 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2259 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2260 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2261 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2262 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2263 2264 // 2265 // String Operations 2266 // 2267 2268 // Unicode Interface 2269 2270 DT_RETURN_MARK_DECL(NewString, jstring 2271 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2272 2273 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2274 JNIWrapper("NewString"); 2275 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2276 jstring ret = NULL; 2277 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2278 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2279 ret = (jstring) JNIHandles::make_local(THREAD, string); 2280 return ret; 2281 JNI_END 2282 2283 2284 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2285 JNIWrapper("GetStringLength"); 2286 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2287 jsize ret = 0; 2288 oop s = JNIHandles::resolve_non_null(string); 2289 ret = java_lang_String::length(s); 2290 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2291 return ret; 2292 JNI_END 2293 2294 2295 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2296 JNIEnv *env, jstring string, jboolean *isCopy)) 2297 JNIWrapper("GetStringChars"); 2298 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2299 jchar* buf = NULL; 2300 oop s = JNIHandles::resolve_non_null(string); 2301 typeArrayOop s_value = java_lang_String::value(s); 2302 if (s_value != NULL) { 2303 int s_len = java_lang_String::length(s, s_value); 2304 bool is_latin1 = java_lang_String::is_latin1(s); 2305 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2306 /* JNI Specification states return NULL on OOM */ 2307 if (buf != NULL) { 2308 if (s_len > 0) { 2309 if (!is_latin1) { 2310 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2311 buf, s_len); 2312 } else { 2313 for (int i = 0; i < s_len; i++) { 2314 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2315 } 2316 } 2317 } 2318 buf[s_len] = 0; 2319 //%note jni_5 2320 if (isCopy != NULL) { 2321 *isCopy = JNI_TRUE; 2322 } 2323 } 2324 } 2325 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2326 return buf; 2327 JNI_END 2328 2329 2330 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2331 JNIWrapper("ReleaseStringChars"); 2332 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2333 //%note jni_6 2334 if (chars != NULL) { 2335 // Since String objects are supposed to be immutable, don't copy any 2336 // new data back. A bad user will have to go after the char array. 2337 FreeHeap((void*) chars); 2338 } 2339 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2340 JNI_END 2341 2342 2343 // UTF Interface 2344 2345 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2346 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2347 2348 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2349 JNIWrapper("NewStringUTF"); 2350 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2351 jstring ret; 2352 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2353 2354 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2355 ret = (jstring) JNIHandles::make_local(THREAD, result); 2356 return ret; 2357 JNI_END 2358 2359 2360 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2361 JNIWrapper("GetStringUTFLength"); 2362 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2363 oop java_string = JNIHandles::resolve_non_null(string); 2364 jsize ret = java_lang_String::utf8_length(java_string); 2365 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2366 return ret; 2367 JNI_END 2368 2369 2370 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2371 JNIWrapper("GetStringUTFChars"); 2372 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2373 char* result = NULL; 2374 oop java_string = JNIHandles::resolve_non_null(string); 2375 typeArrayOop s_value = java_lang_String::value(java_string); 2376 if (s_value != NULL) { 2377 size_t length = java_lang_String::utf8_length(java_string, s_value); 2378 /* JNI Specification states return NULL on OOM */ 2379 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2380 if (result != NULL) { 2381 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2382 if (isCopy != NULL) { 2383 *isCopy = JNI_TRUE; 2384 } 2385 } 2386 } 2387 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2388 return result; 2389 JNI_END 2390 2391 2392 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2393 JNIWrapper("ReleaseStringUTFChars"); 2394 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2395 if (chars != NULL) { 2396 FreeHeap((char*) chars); 2397 } 2398 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2399 JNI_END 2400 2401 2402 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2403 JNIWrapper("GetArrayLength"); 2404 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2405 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2406 assert(a->is_array(), "must be array"); 2407 jsize ret = a->length(); 2408 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2409 return ret; 2410 JNI_END 2411 2412 2413 // 2414 // Object Array Operations 2415 // 2416 2417 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2418 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2419 2420 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2421 JNIWrapper("NewObjectArray"); 2422 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2423 jobjectArray ret = NULL; 2424 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2425 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2426 Klass* ak = ek->array_klass(CHECK_NULL); 2427 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2428 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2429 oop initial_value = JNIHandles::resolve(initialElement); 2430 if (initial_value != NULL) { // array already initialized with NULL 2431 for (int index = 0; index < length; index++) { 2432 result->obj_at_put(index, initial_value); 2433 } 2434 } 2435 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2436 return ret; 2437 JNI_END 2438 2439 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2440 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2441 2442 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2443 JNIWrapper("GetObjectArrayElement"); 2444 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2445 jobject ret = NULL; 2446 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2447 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2448 if (a->is_within_bounds(index)) { 2449 ret = JNIHandles::make_local(THREAD, a->obj_at(index)); 2450 return ret; 2451 } else { 2452 ResourceMark rm(THREAD); 2453 stringStream ss; 2454 ss.print("Index %d out of bounds for length %d", index, a->length()); 2455 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2456 } 2457 JNI_END 2458 2459 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2460 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2461 2462 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2463 JNIWrapper("SetObjectArrayElement"); 2464 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2465 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2466 2467 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2468 oop v = JNIHandles::resolve(value); 2469 if (a->is_within_bounds(index)) { 2470 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2471 a->obj_at_put(index, v); 2472 } else { 2473 ResourceMark rm(THREAD); 2474 stringStream ss; 2475 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2476 ss.print("type mismatch: can not store %s to %s[%d]", 2477 v->klass()->external_name(), 2478 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2479 index); 2480 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2481 ss.print("[]"); 2482 } 2483 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2484 } 2485 } else { 2486 ResourceMark rm(THREAD); 2487 stringStream ss; 2488 ss.print("Index %d out of bounds for length %d", index, a->length()); 2489 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2490 } 2491 JNI_END 2492 2493 2494 2495 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2496 ,EntryProbe,ReturnProbe) \ 2497 \ 2498 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2499 , ReturnProbe); \ 2500 \ 2501 JNI_ENTRY(Return, \ 2502 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2503 JNIWrapper("New" XSTR(Result) "Array"); \ 2504 EntryProbe; \ 2505 Return ret = NULL;\ 2506 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2507 \ 2508 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2509 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2510 return ret;\ 2511 JNI_END 2512 2513 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2514 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2515 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2516 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2517 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2518 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2519 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2520 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2521 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2522 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2523 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2524 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2525 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2526 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2527 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2528 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2529 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2530 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2531 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2532 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2533 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2534 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2535 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2536 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2537 2538 // Return an address which will fault if the caller writes to it. 2539 2540 static char* get_bad_address() { 2541 static char* bad_address = NULL; 2542 if (bad_address == NULL) { 2543 size_t size = os::vm_allocation_granularity(); 2544 bad_address = os::reserve_memory(size); 2545 if (bad_address != NULL) { 2546 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2547 /*is_committed*/false); 2548 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2549 } 2550 } 2551 return bad_address; 2552 } 2553 2554 2555 2556 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2557 , EntryProbe, ReturnProbe) \ 2558 \ 2559 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2560 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2561 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2562 EntryProbe; \ 2563 /* allocate an chunk of memory in c land */ \ 2564 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2565 ElementType* result; \ 2566 int len = a->length(); \ 2567 if (len == 0) { \ 2568 if (isCopy != NULL) { \ 2569 *isCopy = JNI_FALSE; \ 2570 } \ 2571 /* Empty array: legal but useless, can't return NULL. \ 2572 * Return a pointer to something useless. \ 2573 * Avoid asserts in typeArrayOop. */ \ 2574 result = (ElementType*)get_bad_address(); \ 2575 } else { \ 2576 /* JNI Specification states return NULL on OOM */ \ 2577 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2578 if (result != NULL) { \ 2579 /* copy the array to the c chunk */ \ 2580 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2581 result, len); \ 2582 if (isCopy) { \ 2583 *isCopy = JNI_TRUE; \ 2584 } \ 2585 } \ 2586 } \ 2587 ReturnProbe; \ 2588 return result; \ 2589 JNI_END 2590 2591 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2592 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2593 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2594 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2595 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2596 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2597 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2598 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2599 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2600 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2601 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2602 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2603 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2604 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2605 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2606 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2607 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2608 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2609 // Float and double probes don't return value because dtrace doesn't currently support it 2610 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2611 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2612 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2613 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2614 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2615 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2616 2617 2618 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2619 , EntryProbe, ReturnProbe);\ 2620 \ 2621 JNI_ENTRY_NO_PRESERVE(void, \ 2622 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2623 ElementType *buf, jint mode)) \ 2624 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2625 EntryProbe; \ 2626 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2627 int len = a->length(); \ 2628 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2629 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2630 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2631 } \ 2632 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2633 FreeHeap(buf); \ 2634 } \ 2635 } \ 2636 ReturnProbe; \ 2637 JNI_END 2638 2639 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2640 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2641 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2642 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2643 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2644 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2645 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2646 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2647 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2648 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2649 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2650 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2651 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2652 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2653 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2654 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2655 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2656 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2657 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2658 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2659 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2660 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2661 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2662 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2663 2664 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2665 ResourceMark rm(THREAD); 2666 if (copy_len < 0) { 2667 stringStream ss; 2668 ss.print("Length %d is negative", copy_len); 2669 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2670 } else if (start < 0 || (start > array_len - copy_len)) { 2671 stringStream ss; 2672 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2673 start, (int64_t)start+(int64_t)copy_len, array_len); 2674 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2675 } 2676 } 2677 2678 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2679 , EntryProbe, ReturnProbe); \ 2680 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2681 , ReturnProbe); \ 2682 \ 2683 JNI_ENTRY(void, \ 2684 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2685 jsize len, ElementType *buf)) \ 2686 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2687 EntryProbe; \ 2688 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2689 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2690 check_bounds(start, len, src->length(), CHECK); \ 2691 if (len > 0) { \ 2692 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2693 } \ 2694 JNI_END 2695 2696 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2697 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2698 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2699 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2700 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2701 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2702 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2703 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2704 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2705 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2706 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2707 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2708 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2709 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2710 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2711 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2712 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2713 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2714 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2715 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2716 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2717 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2718 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2719 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2720 2721 2722 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2723 , EntryProbe, ReturnProbe); \ 2724 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2725 ,ReturnProbe); \ 2726 \ 2727 JNI_ENTRY(void, \ 2728 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2729 jsize len, const ElementType *buf)) \ 2730 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2731 EntryProbe; \ 2732 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2733 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2734 check_bounds(start, len, dst->length(), CHECK); \ 2735 if (len > 0) { \ 2736 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2737 } \ 2738 JNI_END 2739 2740 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2741 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2742 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2743 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2744 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2745 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2746 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2747 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2748 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2749 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2750 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2751 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2752 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2753 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2754 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2755 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2756 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2757 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2758 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2759 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2760 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2761 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2762 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2763 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2764 2765 2766 DT_RETURN_MARK_DECL(RegisterNatives, jint 2767 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2768 2769 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2770 const JNINativeMethod *methods, 2771 jint nMethods)) 2772 JNIWrapper("RegisterNatives"); 2773 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2774 jint ret = 0; 2775 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2776 2777 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2778 2779 // There are no restrictions on native code registering native methods, 2780 // which allows agents to redefine the bindings to native methods, however 2781 // we issue a warning if any code running outside of the boot/platform 2782 // loader is rebinding any native methods in classes loaded by the 2783 // boot/platform loader that are in named modules. That will catch changes 2784 // to platform classes while excluding classes added to the bootclasspath. 2785 bool do_warning = false; 2786 2787 // Only instanceKlasses can have native methods 2788 if (k->is_instance_klass()) { 2789 oop cl = k->class_loader(); 2790 InstanceKlass* ik = InstanceKlass::cast(k); 2791 // Check for a platform class 2792 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) && 2793 ik->module()->is_named()) { 2794 Klass* caller = thread->security_get_caller_class(1); 2795 // If no caller class, or caller class has a different loader, then 2796 // issue a warning below. 2797 do_warning = (caller == NULL) || caller->class_loader() != cl; 2798 } 2799 } 2800 2801 2802 for (int index = 0; index < nMethods; index++) { 2803 const char* meth_name = methods[index].name; 2804 const char* meth_sig = methods[index].signature; 2805 int meth_name_len = (int)strlen(meth_name); 2806 2807 // The class should have been loaded (we have an instance of the class 2808 // passed in) so the method and signature should already be in the symbol 2809 // table. If they're not there, the method doesn't exist. 2810 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2811 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2812 2813 if (name == NULL || signature == NULL) { 2814 ResourceMark rm(THREAD); 2815 stringStream st; 2816 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2817 // Must return negative value on failure 2818 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2819 } 2820 2821 if (do_warning) { 2822 ResourceMark rm(THREAD); 2823 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2824 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2825 } 2826 2827 bool res = Method::register_native(k, name, signature, 2828 (address) methods[index].fnPtr, THREAD); 2829 if (!res) { 2830 ret = -1; 2831 break; 2832 } 2833 } 2834 return ret; 2835 JNI_END 2836 2837 2838 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2839 JNIWrapper("UnregisterNatives"); 2840 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2841 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2842 //%note jni_2 2843 if (k->is_instance_klass()) { 2844 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2845 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2846 if (m->is_native()) { 2847 m->clear_native_function(); 2848 m->set_signature_handler(NULL); 2849 } 2850 } 2851 } 2852 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2853 return 0; 2854 JNI_END 2855 2856 // 2857 // Monitor functions 2858 // 2859 2860 DT_RETURN_MARK_DECL(MonitorEnter, jint 2861 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2862 2863 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2864 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2865 jint ret = JNI_ERR; 2866 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2867 2868 // If the object is null, we can't do anything with it 2869 if (jobj == NULL) { 2870 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2871 } 2872 2873 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2874 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 2875 ret = JNI_OK; 2876 return ret; 2877 JNI_END 2878 2879 DT_RETURN_MARK_DECL(MonitorExit, jint 2880 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2881 2882 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2883 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2884 jint ret = JNI_ERR; 2885 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2886 2887 // Don't do anything with a null object 2888 if (jobj == NULL) { 2889 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2890 } 2891 2892 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2893 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2894 2895 ret = JNI_OK; 2896 return ret; 2897 JNI_END 2898 2899 // 2900 // Extensions 2901 // 2902 2903 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2904 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2905 2906 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2907 JNIWrapper("GetStringRegion"); 2908 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2909 DT_VOID_RETURN_MARK(GetStringRegion); 2910 oop s = JNIHandles::resolve_non_null(string); 2911 typeArrayOop s_value = java_lang_String::value(s); 2912 int s_len = java_lang_String::length(s, s_value); 2913 if (start < 0 || len < 0 || start > s_len - len) { 2914 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2915 } else { 2916 if (len > 0) { 2917 bool is_latin1 = java_lang_String::is_latin1(s); 2918 if (!is_latin1) { 2919 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2920 buf, len); 2921 } else { 2922 for (int i = 0; i < len; i++) { 2923 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2924 } 2925 } 2926 } 2927 } 2928 JNI_END 2929 2930 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2931 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2932 2933 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2934 JNIWrapper("GetStringUTFRegion"); 2935 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2936 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2937 oop s = JNIHandles::resolve_non_null(string); 2938 typeArrayOop s_value = java_lang_String::value(s); 2939 int s_len = java_lang_String::length(s, s_value); 2940 if (start < 0 || len < 0 || start > s_len - len) { 2941 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2942 } else { 2943 //%note jni_7 2944 if (len > 0) { 2945 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2946 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2947 // as_utf8_string null-terminates the result string 2948 } else { 2949 // JDK null-terminates the buffer even in len is zero 2950 if (buf != NULL) { 2951 buf[0] = 0; 2952 } 2953 } 2954 } 2955 JNI_END 2956 2957 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 2958 if (Universe::heap()->supports_object_pinning()) { 2959 const oop o = JNIHandles::resolve_non_null(obj); 2960 return Universe::heap()->pin_object(thread, o); 2961 } else { 2962 GCLocker::lock_critical(thread); 2963 return JNIHandles::resolve_non_null(obj); 2964 } 2965 } 2966 2967 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 2968 if (Universe::heap()->supports_object_pinning()) { 2969 const oop o = JNIHandles::resolve_non_null(obj); 2970 return Universe::heap()->unpin_object(thread, o); 2971 } else { 2972 GCLocker::unlock_critical(thread); 2973 } 2974 } 2975 2976 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2977 JNIWrapper("GetPrimitiveArrayCritical"); 2978 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2979 if (isCopy != NULL) { 2980 *isCopy = JNI_FALSE; 2981 } 2982 oop a = lock_gc_or_pin_object(thread, array); 2983 assert(a->is_array(), "just checking"); 2984 BasicType type; 2985 if (a->is_objArray()) { 2986 type = T_OBJECT; 2987 } else { 2988 type = TypeArrayKlass::cast(a->klass())->element_type(); 2989 } 2990 void* ret = arrayOop(a)->base(type); 2991 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2992 return ret; 2993 JNI_END 2994 2995 2996 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2997 JNIWrapper("ReleasePrimitiveArrayCritical"); 2998 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 2999 unlock_gc_or_unpin_object(thread, array); 3000 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3001 JNI_END 3002 3003 3004 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3005 JNIWrapper("GetStringCritical"); 3006 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3007 oop s = lock_gc_or_pin_object(thread, string); 3008 typeArrayOop s_value = java_lang_String::value(s); 3009 bool is_latin1 = java_lang_String::is_latin1(s); 3010 if (isCopy != NULL) { 3011 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3012 } 3013 jchar* ret; 3014 if (!is_latin1) { 3015 ret = (jchar*) s_value->base(T_CHAR); 3016 } else { 3017 // Inflate latin1 encoded string to UTF16 3018 int s_len = java_lang_String::length(s, s_value); 3019 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3020 /* JNI Specification states return NULL on OOM */ 3021 if (ret != NULL) { 3022 for (int i = 0; i < s_len; i++) { 3023 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3024 } 3025 ret[s_len] = 0; 3026 } 3027 } 3028 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3029 return ret; 3030 JNI_END 3031 3032 3033 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3034 JNIWrapper("ReleaseStringCritical"); 3035 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3036 // The str and chars arguments are ignored for UTF16 strings 3037 oop s = JNIHandles::resolve_non_null(str); 3038 bool is_latin1 = java_lang_String::is_latin1(s); 3039 if (is_latin1) { 3040 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3041 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3042 FREE_C_HEAP_ARRAY(jchar, chars); 3043 } 3044 unlock_gc_or_unpin_object(thread, str); 3045 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3046 JNI_END 3047 3048 3049 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3050 JNIWrapper("jni_NewWeakGlobalRef"); 3051 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3052 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3053 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 3054 if (ret == NULL) { 3055 THROW_OOP_(Universe::out_of_memory_error_c_heap(), NULL); 3056 } 3057 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3058 return ret; 3059 JNI_END 3060 3061 // Must be JNI_ENTRY (with HandleMark) 3062 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3063 JNIWrapper("jni_DeleteWeakGlobalRef"); 3064 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3065 JNIHandles::destroy_weak_global(ref); 3066 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3067 JNI_END 3068 3069 3070 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3071 JNIWrapper("jni_ExceptionCheck"); 3072 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3073 jni_check_async_exceptions(thread); 3074 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3075 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3076 return ret; 3077 JNI_END 3078 3079 3080 // Initialization state for three routines below relating to 3081 // java.nio.DirectBuffers 3082 static int directBufferSupportInitializeStarted = 0; 3083 static volatile int directBufferSupportInitializeEnded = 0; 3084 static volatile int directBufferSupportInitializeFailed = 0; 3085 static jclass bufferClass = NULL; 3086 static jclass directBufferClass = NULL; 3087 static jclass directByteBufferClass = NULL; 3088 static jmethodID directByteBufferConstructor = NULL; 3089 static jfieldID directBufferAddressField = NULL; 3090 static jfieldID bufferCapacityField = NULL; 3091 3092 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3093 Handle loader; // null (bootstrap) loader 3094 Handle protection_domain; // null protection domain 3095 3096 TempNewSymbol sym = SymbolTable::new_symbol(name); 3097 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3098 3099 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3100 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3101 } 3102 return result; 3103 } 3104 3105 // These lookups are done with the NULL (bootstrap) ClassLoader to 3106 // circumvent any security checks that would be done by jni_FindClass. 3107 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3108 { 3109 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3110 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3111 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3112 return true; 3113 } 3114 JNI_END 3115 3116 3117 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3118 if (directBufferSupportInitializeFailed) { 3119 return false; 3120 } 3121 3122 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 3123 if (!lookupDirectBufferClasses(env)) { 3124 directBufferSupportInitializeFailed = 1; 3125 return false; 3126 } 3127 3128 // Make global references for these 3129 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3130 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3131 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3132 3133 // Global refs will be NULL if out-of-memory (no exception is pending) 3134 if (bufferClass == NULL || directBufferClass == NULL || directByteBufferClass == NULL) { 3135 directBufferSupportInitializeFailed = 1; 3136 return false; 3137 } 3138 3139 // Get needed field and method IDs 3140 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3141 if (env->ExceptionCheck()) { 3142 env->ExceptionClear(); 3143 directBufferSupportInitializeFailed = 1; 3144 return false; 3145 } 3146 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3147 if (env->ExceptionCheck()) { 3148 env->ExceptionClear(); 3149 directBufferSupportInitializeFailed = 1; 3150 return false; 3151 } 3152 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3153 if (env->ExceptionCheck()) { 3154 env->ExceptionClear(); 3155 directBufferSupportInitializeFailed = 1; 3156 return false; 3157 } 3158 3159 if ((directByteBufferConstructor == NULL) || 3160 (directBufferAddressField == NULL) || 3161 (bufferCapacityField == NULL)) { 3162 directBufferSupportInitializeFailed = 1; 3163 return false; 3164 } 3165 3166 directBufferSupportInitializeEnded = 1; 3167 } else { 3168 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3169 os::naked_yield(); 3170 } 3171 } 3172 3173 return !directBufferSupportInitializeFailed; 3174 } 3175 3176 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3177 { 3178 // thread_from_jni_environment() will block if VM is gone. 3179 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3180 3181 JNIWrapper("jni_NewDirectByteBuffer"); 3182 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3183 3184 if (!directBufferSupportInitializeEnded) { 3185 if (!initializeDirectBufferSupport(env, thread)) { 3186 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3187 return NULL; 3188 } 3189 } 3190 3191 // Being paranoid about accidental sign extension on address 3192 jlong addr = (jlong) ((uintptr_t) address); 3193 // NOTE that package-private DirectByteBuffer constructor currently 3194 // takes int capacity 3195 jint cap = (jint) capacity; 3196 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3197 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3198 return ret; 3199 } 3200 3201 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3202 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3203 3204 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3205 { 3206 // thread_from_jni_environment() will block if VM is gone. 3207 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3208 3209 JNIWrapper("jni_GetDirectBufferAddress"); 3210 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3211 void* ret = NULL; 3212 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3213 3214 if (!directBufferSupportInitializeEnded) { 3215 if (!initializeDirectBufferSupport(env, thread)) { 3216 return 0; 3217 } 3218 } 3219 3220 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3221 return 0; 3222 } 3223 3224 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3225 return ret; 3226 } 3227 3228 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3229 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3230 3231 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3232 { 3233 // thread_from_jni_environment() will block if VM is gone. 3234 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3235 3236 JNIWrapper("jni_GetDirectBufferCapacity"); 3237 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3238 jlong ret = -1; 3239 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3240 3241 if (!directBufferSupportInitializeEnded) { 3242 if (!initializeDirectBufferSupport(env, thread)) { 3243 ret = 0; 3244 return ret; 3245 } 3246 } 3247 3248 if (buf == NULL) { 3249 return -1; 3250 } 3251 3252 if (!env->IsInstanceOf(buf, directBufferClass)) { 3253 return -1; 3254 } 3255 3256 // NOTE that capacity is currently an int in the implementation 3257 ret = env->GetIntField(buf, bufferCapacityField); 3258 return ret; 3259 } 3260 3261 3262 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3263 JNIWrapper("GetVersion"); 3264 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3265 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3266 return CurrentVersion; 3267 JNI_END 3268 3269 extern struct JavaVM_ main_vm; 3270 3271 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3272 JNIWrapper("jni_GetJavaVM"); 3273 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3274 *vm = (JavaVM *)(&main_vm); 3275 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3276 return JNI_OK; 3277 JNI_END 3278 3279 3280 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3281 JNIWrapper("GetModule"); 3282 return Modules::get_module(clazz, THREAD); 3283 JNI_END 3284 3285 3286 // Structure containing all jni functions 3287 struct JNINativeInterface_ jni_NativeInterface = { 3288 NULL, 3289 NULL, 3290 NULL, 3291 3292 NULL, 3293 3294 jni_GetVersion, 3295 3296 jni_DefineClass, 3297 jni_FindClass, 3298 3299 jni_FromReflectedMethod, 3300 jni_FromReflectedField, 3301 3302 jni_ToReflectedMethod, 3303 3304 jni_GetSuperclass, 3305 jni_IsAssignableFrom, 3306 3307 jni_ToReflectedField, 3308 3309 jni_Throw, 3310 jni_ThrowNew, 3311 jni_ExceptionOccurred, 3312 jni_ExceptionDescribe, 3313 jni_ExceptionClear, 3314 jni_FatalError, 3315 3316 jni_PushLocalFrame, 3317 jni_PopLocalFrame, 3318 3319 jni_NewGlobalRef, 3320 jni_DeleteGlobalRef, 3321 jni_DeleteLocalRef, 3322 jni_IsSameObject, 3323 3324 jni_NewLocalRef, 3325 jni_EnsureLocalCapacity, 3326 3327 jni_AllocObject, 3328 jni_NewObject, 3329 jni_NewObjectV, 3330 jni_NewObjectA, 3331 3332 jni_GetObjectClass, 3333 jni_IsInstanceOf, 3334 3335 jni_GetMethodID, 3336 3337 jni_CallObjectMethod, 3338 jni_CallObjectMethodV, 3339 jni_CallObjectMethodA, 3340 jni_CallBooleanMethod, 3341 jni_CallBooleanMethodV, 3342 jni_CallBooleanMethodA, 3343 jni_CallByteMethod, 3344 jni_CallByteMethodV, 3345 jni_CallByteMethodA, 3346 jni_CallCharMethod, 3347 jni_CallCharMethodV, 3348 jni_CallCharMethodA, 3349 jni_CallShortMethod, 3350 jni_CallShortMethodV, 3351 jni_CallShortMethodA, 3352 jni_CallIntMethod, 3353 jni_CallIntMethodV, 3354 jni_CallIntMethodA, 3355 jni_CallLongMethod, 3356 jni_CallLongMethodV, 3357 jni_CallLongMethodA, 3358 jni_CallFloatMethod, 3359 jni_CallFloatMethodV, 3360 jni_CallFloatMethodA, 3361 jni_CallDoubleMethod, 3362 jni_CallDoubleMethodV, 3363 jni_CallDoubleMethodA, 3364 jni_CallVoidMethod, 3365 jni_CallVoidMethodV, 3366 jni_CallVoidMethodA, 3367 3368 jni_CallNonvirtualObjectMethod, 3369 jni_CallNonvirtualObjectMethodV, 3370 jni_CallNonvirtualObjectMethodA, 3371 jni_CallNonvirtualBooleanMethod, 3372 jni_CallNonvirtualBooleanMethodV, 3373 jni_CallNonvirtualBooleanMethodA, 3374 jni_CallNonvirtualByteMethod, 3375 jni_CallNonvirtualByteMethodV, 3376 jni_CallNonvirtualByteMethodA, 3377 jni_CallNonvirtualCharMethod, 3378 jni_CallNonvirtualCharMethodV, 3379 jni_CallNonvirtualCharMethodA, 3380 jni_CallNonvirtualShortMethod, 3381 jni_CallNonvirtualShortMethodV, 3382 jni_CallNonvirtualShortMethodA, 3383 jni_CallNonvirtualIntMethod, 3384 jni_CallNonvirtualIntMethodV, 3385 jni_CallNonvirtualIntMethodA, 3386 jni_CallNonvirtualLongMethod, 3387 jni_CallNonvirtualLongMethodV, 3388 jni_CallNonvirtualLongMethodA, 3389 jni_CallNonvirtualFloatMethod, 3390 jni_CallNonvirtualFloatMethodV, 3391 jni_CallNonvirtualFloatMethodA, 3392 jni_CallNonvirtualDoubleMethod, 3393 jni_CallNonvirtualDoubleMethodV, 3394 jni_CallNonvirtualDoubleMethodA, 3395 jni_CallNonvirtualVoidMethod, 3396 jni_CallNonvirtualVoidMethodV, 3397 jni_CallNonvirtualVoidMethodA, 3398 3399 jni_GetFieldID, 3400 3401 jni_GetObjectField, 3402 jni_GetBooleanField, 3403 jni_GetByteField, 3404 jni_GetCharField, 3405 jni_GetShortField, 3406 jni_GetIntField, 3407 jni_GetLongField, 3408 jni_GetFloatField, 3409 jni_GetDoubleField, 3410 3411 jni_SetObjectField, 3412 jni_SetBooleanField, 3413 jni_SetByteField, 3414 jni_SetCharField, 3415 jni_SetShortField, 3416 jni_SetIntField, 3417 jni_SetLongField, 3418 jni_SetFloatField, 3419 jni_SetDoubleField, 3420 3421 jni_GetStaticMethodID, 3422 3423 jni_CallStaticObjectMethod, 3424 jni_CallStaticObjectMethodV, 3425 jni_CallStaticObjectMethodA, 3426 jni_CallStaticBooleanMethod, 3427 jni_CallStaticBooleanMethodV, 3428 jni_CallStaticBooleanMethodA, 3429 jni_CallStaticByteMethod, 3430 jni_CallStaticByteMethodV, 3431 jni_CallStaticByteMethodA, 3432 jni_CallStaticCharMethod, 3433 jni_CallStaticCharMethodV, 3434 jni_CallStaticCharMethodA, 3435 jni_CallStaticShortMethod, 3436 jni_CallStaticShortMethodV, 3437 jni_CallStaticShortMethodA, 3438 jni_CallStaticIntMethod, 3439 jni_CallStaticIntMethodV, 3440 jni_CallStaticIntMethodA, 3441 jni_CallStaticLongMethod, 3442 jni_CallStaticLongMethodV, 3443 jni_CallStaticLongMethodA, 3444 jni_CallStaticFloatMethod, 3445 jni_CallStaticFloatMethodV, 3446 jni_CallStaticFloatMethodA, 3447 jni_CallStaticDoubleMethod, 3448 jni_CallStaticDoubleMethodV, 3449 jni_CallStaticDoubleMethodA, 3450 jni_CallStaticVoidMethod, 3451 jni_CallStaticVoidMethodV, 3452 jni_CallStaticVoidMethodA, 3453 3454 jni_GetStaticFieldID, 3455 3456 jni_GetStaticObjectField, 3457 jni_GetStaticBooleanField, 3458 jni_GetStaticByteField, 3459 jni_GetStaticCharField, 3460 jni_GetStaticShortField, 3461 jni_GetStaticIntField, 3462 jni_GetStaticLongField, 3463 jni_GetStaticFloatField, 3464 jni_GetStaticDoubleField, 3465 3466 jni_SetStaticObjectField, 3467 jni_SetStaticBooleanField, 3468 jni_SetStaticByteField, 3469 jni_SetStaticCharField, 3470 jni_SetStaticShortField, 3471 jni_SetStaticIntField, 3472 jni_SetStaticLongField, 3473 jni_SetStaticFloatField, 3474 jni_SetStaticDoubleField, 3475 3476 jni_NewString, 3477 jni_GetStringLength, 3478 jni_GetStringChars, 3479 jni_ReleaseStringChars, 3480 3481 jni_NewStringUTF, 3482 jni_GetStringUTFLength, 3483 jni_GetStringUTFChars, 3484 jni_ReleaseStringUTFChars, 3485 3486 jni_GetArrayLength, 3487 3488 jni_NewObjectArray, 3489 jni_GetObjectArrayElement, 3490 jni_SetObjectArrayElement, 3491 3492 jni_NewBooleanArray, 3493 jni_NewByteArray, 3494 jni_NewCharArray, 3495 jni_NewShortArray, 3496 jni_NewIntArray, 3497 jni_NewLongArray, 3498 jni_NewFloatArray, 3499 jni_NewDoubleArray, 3500 3501 jni_GetBooleanArrayElements, 3502 jni_GetByteArrayElements, 3503 jni_GetCharArrayElements, 3504 jni_GetShortArrayElements, 3505 jni_GetIntArrayElements, 3506 jni_GetLongArrayElements, 3507 jni_GetFloatArrayElements, 3508 jni_GetDoubleArrayElements, 3509 3510 jni_ReleaseBooleanArrayElements, 3511 jni_ReleaseByteArrayElements, 3512 jni_ReleaseCharArrayElements, 3513 jni_ReleaseShortArrayElements, 3514 jni_ReleaseIntArrayElements, 3515 jni_ReleaseLongArrayElements, 3516 jni_ReleaseFloatArrayElements, 3517 jni_ReleaseDoubleArrayElements, 3518 3519 jni_GetBooleanArrayRegion, 3520 jni_GetByteArrayRegion, 3521 jni_GetCharArrayRegion, 3522 jni_GetShortArrayRegion, 3523 jni_GetIntArrayRegion, 3524 jni_GetLongArrayRegion, 3525 jni_GetFloatArrayRegion, 3526 jni_GetDoubleArrayRegion, 3527 3528 jni_SetBooleanArrayRegion, 3529 jni_SetByteArrayRegion, 3530 jni_SetCharArrayRegion, 3531 jni_SetShortArrayRegion, 3532 jni_SetIntArrayRegion, 3533 jni_SetLongArrayRegion, 3534 jni_SetFloatArrayRegion, 3535 jni_SetDoubleArrayRegion, 3536 3537 jni_RegisterNatives, 3538 jni_UnregisterNatives, 3539 3540 jni_MonitorEnter, 3541 jni_MonitorExit, 3542 3543 jni_GetJavaVM, 3544 3545 jni_GetStringRegion, 3546 jni_GetStringUTFRegion, 3547 3548 jni_GetPrimitiveArrayCritical, 3549 jni_ReleasePrimitiveArrayCritical, 3550 3551 jni_GetStringCritical, 3552 jni_ReleaseStringCritical, 3553 3554 jni_NewWeakGlobalRef, 3555 jni_DeleteWeakGlobalRef, 3556 3557 jni_ExceptionCheck, 3558 3559 jni_NewDirectByteBuffer, 3560 jni_GetDirectBufferAddress, 3561 jni_GetDirectBufferCapacity, 3562 3563 // New 1_6 features 3564 3565 jni_GetObjectRefType, 3566 3567 // Module features 3568 3569 jni_GetModule 3570 }; 3571 3572 3573 // For jvmti use to modify jni function table. 3574 // Java threads in native contiues to run until it is transitioned 3575 // to VM at safepoint. Before the transition or before it is blocked 3576 // for safepoint it may access jni function table. VM could crash if 3577 // any java thread access the jni function table in the middle of memcpy. 3578 // To avoid this each function pointers are copied automically. 3579 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3580 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3581 intptr_t *a = (intptr_t *) jni_functions(); 3582 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3583 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3584 Atomic::store(a++, *b++); 3585 } 3586 } 3587 3588 void quicken_jni_functions() { 3589 // Replace Get<Primitive>Field with fast versions 3590 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) { 3591 address func; 3592 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3593 if (func != (address)-1) { 3594 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3595 } 3596 func = JNI_FastGetField::generate_fast_get_byte_field(); 3597 if (func != (address)-1) { 3598 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3599 } 3600 func = JNI_FastGetField::generate_fast_get_char_field(); 3601 if (func != (address)-1) { 3602 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3603 } 3604 func = JNI_FastGetField::generate_fast_get_short_field(); 3605 if (func != (address)-1) { 3606 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3607 } 3608 func = JNI_FastGetField::generate_fast_get_int_field(); 3609 if (func != (address)-1) { 3610 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3611 } 3612 func = JNI_FastGetField::generate_fast_get_long_field(); 3613 if (func != (address)-1) { 3614 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3615 } 3616 func = JNI_FastGetField::generate_fast_get_float_field(); 3617 if (func != (address)-1) { 3618 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3619 } 3620 func = JNI_FastGetField::generate_fast_get_double_field(); 3621 if (func != (address)-1) { 3622 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3623 } 3624 } 3625 } 3626 3627 // Returns the function structure 3628 struct JNINativeInterface_* jni_functions() { 3629 #if INCLUDE_JNI_CHECK 3630 if (CheckJNICalls) return jni_functions_check(); 3631 #endif // INCLUDE_JNI_CHECK 3632 return &jni_NativeInterface; 3633 } 3634 3635 // Returns the function structure 3636 struct JNINativeInterface_* jni_functions_nocheck() { 3637 return &jni_NativeInterface; 3638 } 3639 3640 static void post_thread_start_event(const JavaThread* jt) { 3641 assert(jt != NULL, "invariant"); 3642 EventThreadStart event; 3643 if (event.should_commit()) { 3644 event.set_thread(JFR_THREAD_ID(jt)); 3645 event.set_parentThread((traceid)0); 3646 #if INCLUDE_JFR 3647 if (EventThreadStart::is_stacktrace_enabled()) { 3648 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0); 3649 event.commit(); 3650 jt->jfr_thread_local()->clear_cached_stack_trace(); 3651 } else 3652 #endif 3653 { 3654 event.commit(); 3655 } 3656 } 3657 } 3658 3659 // Invocation API 3660 3661 3662 // Forward declaration 3663 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3664 3665 // Global invocation API vars 3666 volatile int vm_created = 0; 3667 // Indicate whether it is safe to recreate VM. Recreation is only 3668 // possible after a failed initial creation attempt in some cases. 3669 volatile int safe_to_recreate_vm = 1; 3670 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3671 3672 3673 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3674 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3675 3676 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3677 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3678 3679 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3680 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3681 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3682 jint ret = JNI_ERR; 3683 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3684 3685 if (Threads::is_supported_jni_version(args->version)) { 3686 ret = JNI_OK; 3687 } 3688 // 1.1 style no longer supported in hotspot. 3689 // According the JNI spec, we should update args->version on return. 3690 // We also use the structure to communicate with launcher about default 3691 // stack size. 3692 if (args->version == JNI_VERSION_1_1) { 3693 args->version = JNI_VERSION_1_2; 3694 // javaStackSize is int in arguments structure 3695 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3696 args->javaStackSize = (jint)(ThreadStackSize * K); 3697 } 3698 return ret; 3699 } 3700 3701 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3702 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3703 3704 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3705 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3706 3707 jint result = JNI_ERR; 3708 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3709 3710 // We're about to use Atomic::xchg for synchronization. Some Zero 3711 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3712 // but __sync_lock_test_and_set is not guaranteed to do what we want 3713 // on all architectures. So we check it works before relying on it. 3714 #if defined(ZERO) && defined(ASSERT) 3715 { 3716 jint a = 0xcafebabe; 3717 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3718 void *c = &a; 3719 void *d = Atomic::xchg(&c, &b); 3720 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3721 assert(c == &b && d == &a, "Atomic::xchg() works"); 3722 } 3723 #endif // ZERO && ASSERT 3724 3725 // At the moment it's only possible to have one Java VM, 3726 // since some of the runtime state is in global variables. 3727 3728 // We cannot use our mutex locks here, since they only work on 3729 // Threads. We do an atomic compare and exchange to ensure only 3730 // one thread can call this method at a time 3731 3732 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3733 // the add/dec implementations are dependent on whether we are running 3734 // on a multiprocessor Atomic::xchg does not have this problem. 3735 if (Atomic::xchg(&vm_created, 1) == 1) { 3736 return JNI_EEXIST; // already created, or create attempt in progress 3737 } 3738 3739 // If a previous creation attempt failed but can be retried safely, 3740 // then safe_to_recreate_vm will have been reset to 1 after being 3741 // cleared here. If a previous creation attempt succeeded and we then 3742 // destroyed that VM, we will be prevented from trying to recreate 3743 // the VM in the same process, as the value will still be 0. 3744 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3745 return JNI_ERR; 3746 } 3747 3748 assert(vm_created == 1, "vm_created is true during the creation"); 3749 3750 /** 3751 * Certain errors during initialization are recoverable and do not 3752 * prevent this method from being called again at a later time 3753 * (perhaps with different arguments). However, at a certain 3754 * point during initialization if an error occurs we cannot allow 3755 * this function to be called again (or it will crash). In those 3756 * situations, the 'canTryAgain' flag is set to false, which atomically 3757 * sets safe_to_recreate_vm to 1, such that any new call to 3758 * JNI_CreateJavaVM will immediately fail using the above logic. 3759 */ 3760 bool can_try_again = true; 3761 3762 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3763 if (result == JNI_OK) { 3764 JavaThread *thread = JavaThread::current(); 3765 assert(!thread->has_pending_exception(), "should have returned not OK"); 3766 /* thread is thread_in_vm here */ 3767 *vm = (JavaVM *)(&main_vm); 3768 *(JNIEnv**)penv = thread->jni_environment(); 3769 3770 #if INCLUDE_JVMCI 3771 if (EnableJVMCI) { 3772 if (UseJVMCICompiler) { 3773 // JVMCI is initialized on a CompilerThread 3774 if (BootstrapJVMCI) { 3775 JavaThread* THREAD = thread; 3776 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3777 compiler->bootstrap(THREAD); 3778 if (HAS_PENDING_EXCEPTION) { 3779 HandleMark hm; 3780 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3781 } 3782 } 3783 } 3784 } 3785 #endif 3786 3787 // Notify JVMTI 3788 if (JvmtiExport::should_post_thread_life()) { 3789 JvmtiExport::post_thread_start(thread); 3790 } 3791 3792 post_thread_start_event(thread); 3793 3794 #ifndef PRODUCT 3795 if (ReplayCompiles) ciReplay::replay(thread); 3796 3797 // Some platforms (like Win*) need a wrapper around these test 3798 // functions in order to properly handle error conditions. 3799 VMError::test_error_handler(); 3800 #endif 3801 3802 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3803 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3804 } else { 3805 // If create_vm exits because of a pending exception, exit with that 3806 // exception. In the future when we figure out how to reclaim memory, 3807 // we may be able to exit with JNI_ERR and allow the calling application 3808 // to continue. 3809 if (Universe::is_fully_initialized()) { 3810 // otherwise no pending exception possible - VM will already have aborted 3811 JavaThread* THREAD = JavaThread::current(); 3812 if (HAS_PENDING_EXCEPTION) { 3813 HandleMark hm; 3814 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3815 } 3816 } 3817 3818 if (can_try_again) { 3819 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3820 safe_to_recreate_vm = 1; 3821 } 3822 3823 // Creation failed. We must reset vm_created 3824 *vm = 0; 3825 *(JNIEnv**)penv = 0; 3826 // reset vm_created last to avoid race condition. Use OrderAccess to 3827 // control both compiler and architectural-based reordering. 3828 Atomic::release_store(&vm_created, 0); 3829 } 3830 3831 // Flush stdout and stderr before exit. 3832 fflush(stdout); 3833 fflush(stderr); 3834 3835 return result; 3836 3837 } 3838 3839 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3840 jint result = JNI_ERR; 3841 // On Windows, let CreateJavaVM run with SEH protection 3842 #ifdef _WIN32 3843 __try { 3844 #endif 3845 result = JNI_CreateJavaVM_inner(vm, penv, args); 3846 #ifdef _WIN32 3847 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3848 // Nothing to do. 3849 } 3850 #endif 3851 return result; 3852 } 3853 3854 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3855 // See bug 4367188, the wrapper can sometimes cause VM crashes 3856 // JNIWrapper("GetCreatedJavaVMs"); 3857 3858 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3859 3860 if (vm_created == 1) { 3861 if (numVMs != NULL) *numVMs = 1; 3862 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3863 } else { 3864 if (numVMs != NULL) *numVMs = 0; 3865 } 3866 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3867 return JNI_OK; 3868 } 3869 3870 extern "C" { 3871 3872 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3873 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3874 3875 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3876 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3877 jint res = JNI_ERR; 3878 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3879 3880 if (vm_created == 0) { 3881 res = JNI_ERR; 3882 return res; 3883 } 3884 3885 JNIWrapper("DestroyJavaVM"); 3886 JNIEnv *env; 3887 JavaVMAttachArgs destroyargs; 3888 destroyargs.version = CurrentVersion; 3889 destroyargs.name = (char *)"DestroyJavaVM"; 3890 destroyargs.group = NULL; 3891 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3892 if (res != JNI_OK) { 3893 return res; 3894 } 3895 3896 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3897 JavaThread* thread = JavaThread::current(); 3898 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3899 if (Threads::destroy_vm()) { 3900 // Should not change thread state, VM is gone 3901 vm_created = 0; 3902 res = JNI_OK; 3903 return res; 3904 } else { 3905 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3906 res = JNI_ERR; 3907 return res; 3908 } 3909 } 3910 3911 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3912 jint result = JNI_ERR; 3913 // On Windows, we need SEH protection 3914 #ifdef _WIN32 3915 __try { 3916 #endif 3917 result = jni_DestroyJavaVM_inner(vm); 3918 #ifdef _WIN32 3919 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3920 // Nothing to do. 3921 } 3922 #endif 3923 return result; 3924 } 3925 3926 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3927 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3928 3929 // Check below commented out from JDK1.2fcs as well 3930 /* 3931 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3932 return JNI_EVERSION; 3933 } 3934 */ 3935 3936 Thread* t = Thread::current_or_null(); 3937 if (t != NULL) { 3938 // If executing from an atexit hook we may be in the VMThread. 3939 if (t->is_Java_thread()) { 3940 // If the thread has been attached this operation is a no-op 3941 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 3942 return JNI_OK; 3943 } else { 3944 return JNI_ERR; 3945 } 3946 } 3947 3948 // Create a thread and mark it as attaching so it will be skipped by the 3949 // ThreadsListEnumerator - see CR 6404306 3950 JavaThread* thread = new JavaThread(true); 3951 3952 // Set correct safepoint info. The thread is going to call into Java when 3953 // initializing the Java level thread object. Hence, the correct state must 3954 // be set in order for the Safepoint code to deal with it correctly. 3955 thread->set_thread_state(_thread_in_vm); 3956 thread->record_stack_base_and_size(); 3957 thread->register_thread_stack_with_NMT(); 3958 thread->initialize_thread_current(); 3959 3960 if (!os::create_attached_thread(thread)) { 3961 thread->smr_delete(); 3962 return JNI_ERR; 3963 } 3964 // Enable stack overflow checks 3965 thread->create_stack_guard_pages(); 3966 3967 thread->initialize_tlab(); 3968 3969 thread->cache_global_variables(); 3970 3971 // This thread will not do a safepoint check, since it has 3972 // not been added to the Thread list yet. 3973 { MutexLocker ml(Threads_lock); 3974 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3975 // avoid this thread trying to do a GC before it is added to the thread-list 3976 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3977 Threads::add(thread, daemon); 3978 } 3979 // Create thread group and name info from attach arguments 3980 oop group = NULL; 3981 char* thread_name = NULL; 3982 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 3983 group = JNIHandles::resolve(args->group); 3984 thread_name = args->name; // may be NULL 3985 } 3986 if (group == NULL) group = Universe::main_thread_group(); 3987 3988 // Create Java level thread object and attach it to this thread 3989 bool attach_failed = false; 3990 { 3991 EXCEPTION_MARK; 3992 HandleMark hm(THREAD); 3993 Handle thread_group(THREAD, group); 3994 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3995 if (HAS_PENDING_EXCEPTION) { 3996 CLEAR_PENDING_EXCEPTION; 3997 // cleanup outside the handle mark. 3998 attach_failed = true; 3999 } 4000 } 4001 4002 if (attach_failed) { 4003 // Added missing cleanup 4004 thread->cleanup_failed_attach_current_thread(daemon); 4005 return JNI_ERR; 4006 } 4007 4008 // mark the thread as no longer attaching 4009 // this uses a fence to push the change through so we don't have 4010 // to regrab the threads_lock 4011 thread->set_done_attaching_via_jni(); 4012 4013 // Set java thread status. 4014 java_lang_Thread::set_thread_status(thread->threadObj(), 4015 java_lang_Thread::RUNNABLE); 4016 4017 // Notify the debugger 4018 if (JvmtiExport::should_post_thread_life()) { 4019 JvmtiExport::post_thread_start(thread); 4020 } 4021 4022 post_thread_start_event(thread); 4023 4024 *(JNIEnv**)penv = thread->jni_environment(); 4025 4026 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4027 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4028 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4029 // needed. 4030 4031 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4032 4033 // Perform any platform dependent FPU setup 4034 os::setup_fpu(); 4035 4036 return JNI_OK; 4037 } 4038 4039 4040 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4041 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4042 if (vm_created == 0) { 4043 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4044 return JNI_ERR; 4045 } 4046 4047 JNIWrapper("AttachCurrentThread"); 4048 jint ret = attach_current_thread(vm, penv, _args, false); 4049 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4050 return ret; 4051 } 4052 4053 4054 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4055 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4056 if (vm_created == 0) { 4057 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 4058 return JNI_ERR; 4059 } 4060 4061 JNIWrapper("DetachCurrentThread"); 4062 4063 Thread* current = Thread::current_or_null(); 4064 4065 // If the thread has already been detached the operation is a no-op 4066 if (current == NULL) { 4067 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4068 return JNI_OK; 4069 } 4070 4071 // If executing from an atexit hook we may be in the VMThread. 4072 if (!current->is_Java_thread()) { 4073 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4074 return JNI_ERR; 4075 } 4076 4077 VM_Exit::block_if_vm_exited(); 4078 4079 JavaThread* thread = (JavaThread*) current; 4080 if (thread->has_last_Java_frame()) { 4081 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4082 // Can't detach a thread that's running java, that can't work. 4083 return JNI_ERR; 4084 } 4085 4086 // Safepoint support. Have to do call-back to safepoint code, if in the 4087 // middle of a safepoint operation 4088 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4089 4090 // XXX: Note that JavaThread::exit() call below removes the guards on the 4091 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4092 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4093 // of the guards is visible in jni_AttachCurrentThread above, 4094 // the removal of the guards is buried below in JavaThread::exit() 4095 // here. The abstraction should be more symmetrically either exposed 4096 // or hidden (e.g. it could probably be hidden in the same 4097 // (platform-dependent) methods where we do alternate stack 4098 // maintenance work?) 4099 thread->exit(false, JavaThread::jni_detach); 4100 thread->smr_delete(); 4101 4102 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4103 return JNI_OK; 4104 } 4105 4106 DT_RETURN_MARK_DECL(GetEnv, jint 4107 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4108 4109 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4110 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4111 jint ret = JNI_ERR; 4112 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4113 4114 if (vm_created == 0) { 4115 *penv = NULL; 4116 ret = JNI_EDETACHED; 4117 return ret; 4118 } 4119 4120 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4121 return ret; 4122 } 4123 4124 #ifndef JVMPI_VERSION_1 4125 // need these in order to be polite about older agents 4126 #define JVMPI_VERSION_1 ((jint)0x10000001) 4127 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4128 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4129 #endif // !JVMPI_VERSION_1 4130 4131 Thread* thread = Thread::current_or_null(); 4132 if (thread != NULL && thread->is_Java_thread()) { 4133 if (Threads::is_supported_jni_version_including_1_1(version)) { 4134 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4135 ret = JNI_OK; 4136 return ret; 4137 4138 } else if (version == JVMPI_VERSION_1 || 4139 version == JVMPI_VERSION_1_1 || 4140 version == JVMPI_VERSION_1_2) { 4141 tty->print_cr("ERROR: JVMPI, an experimental interface, 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 if (JvmtiExport::is_jvmdi_version(version)) { 4146 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4147 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4148 ret = JNI_EVERSION; 4149 return ret; 4150 } else { 4151 *penv = NULL; 4152 ret = JNI_EVERSION; 4153 return ret; 4154 } 4155 } else { 4156 *penv = NULL; 4157 ret = JNI_EDETACHED; 4158 return ret; 4159 } 4160 } 4161 4162 4163 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4164 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4165 if (vm_created == 0) { 4166 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4167 return JNI_ERR; 4168 } 4169 4170 JNIWrapper("AttachCurrentThreadAsDaemon"); 4171 jint ret = attach_current_thread(vm, penv, _args, true); 4172 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4173 return ret; 4174 } 4175 4176 4177 } // End extern "C" 4178 4179 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4180 NULL, 4181 NULL, 4182 NULL, 4183 4184 jni_DestroyJavaVM, 4185 jni_AttachCurrentThread, 4186 jni_DetachCurrentThread, 4187 jni_GetEnv, 4188 jni_AttachCurrentThreadAsDaemon 4189 };