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:: 332 query_lock_ownership((JavaThread*)THREAD, class_loader) != 333 ObjectSynchronizer::owner_self) { 334 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 335 } 336 } 337 Klass* k = SystemDictionary::resolve_from_stream(class_name, 338 class_loader, 339 Handle(), 340 &st, 341 CHECK_NULL); 342 343 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 344 trace_class_resolution(k); 345 } 346 347 cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror()); 348 return cls; 349 JNI_END 350 351 352 353 DT_RETURN_MARK_DECL(FindClass, jclass 354 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 355 356 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 357 JNIWrapper("FindClass"); 358 359 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 360 361 jclass result = NULL; 362 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 363 364 // This should be ClassNotFoundException imo. 365 TempNewSymbol class_name = 366 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 367 CHECK_NULL); 368 369 //%note jni_3 370 Handle protection_domain; 371 // Find calling class 372 Klass* k = thread->security_get_caller_class(0); 373 // default to the system loader when no context 374 Handle loader(THREAD, SystemDictionary::java_system_loader()); 375 if (k != NULL) { 376 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 377 // in the correct class context. 378 if (k->class_loader() == NULL && 379 k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) { 380 JavaValue result(T_OBJECT); 381 JavaCalls::call_static(&result, k, 382 vmSymbols::getFromClass_name(), 383 vmSymbols::void_class_signature(), 384 CHECK_NULL); 385 // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns 386 // a non-NULL Class object. When invoked from JNI_OnUnload, 387 // it will return NULL to indicate no context. 388 oop mirror = (oop) result.get_jobject(); 389 if (mirror != NULL) { 390 Klass* fromClass = java_lang_Class::as_Klass(mirror); 391 loader = Handle(THREAD, fromClass->class_loader()); 392 protection_domain = Handle(THREAD, fromClass->protection_domain()); 393 } 394 } else { 395 loader = Handle(THREAD, k->class_loader()); 396 } 397 } 398 399 result = find_class_from_class_loader(env, class_name, true, loader, 400 protection_domain, true, thread); 401 402 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 403 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 404 } 405 406 return result; 407 JNI_END 408 409 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 410 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 411 412 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 413 JNIWrapper("FromReflectedMethod"); 414 415 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 416 417 jmethodID ret = NULL; 418 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 419 420 // method is a handle to a java.lang.reflect.Method object 421 oop reflected = JNIHandles::resolve_non_null(method); 422 oop mirror = NULL; 423 int slot = 0; 424 425 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 426 mirror = java_lang_reflect_Constructor::clazz(reflected); 427 slot = java_lang_reflect_Constructor::slot(reflected); 428 } else { 429 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 430 mirror = java_lang_reflect_Method::clazz(reflected); 431 slot = java_lang_reflect_Method::slot(reflected); 432 } 433 Klass* k1 = java_lang_Class::as_Klass(mirror); 434 435 // Make sure class is initialized before handing id's out to methods 436 k1->initialize(CHECK_NULL); 437 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 438 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 439 return ret; 440 JNI_END 441 442 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 443 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 444 445 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 446 JNIWrapper("FromReflectedField"); 447 448 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 449 450 jfieldID ret = NULL; 451 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 452 453 // field is a handle to a java.lang.reflect.Field object 454 oop reflected = JNIHandles::resolve_non_null(field); 455 oop mirror = java_lang_reflect_Field::clazz(reflected); 456 Klass* k1 = java_lang_Class::as_Klass(mirror); 457 int slot = java_lang_reflect_Field::slot(reflected); 458 int modifiers = java_lang_reflect_Field::modifiers(reflected); 459 460 // Make sure class is initialized before handing id's out to fields 461 k1->initialize(CHECK_NULL); 462 463 // First check if this is a static field 464 if (modifiers & JVM_ACC_STATIC) { 465 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 466 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 467 assert(id != NULL, "corrupt Field object"); 468 debug_only(id->set_is_static_field_id();) 469 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 470 ret = jfieldIDWorkaround::to_static_jfieldID(id); 471 return ret; 472 } 473 474 // The slot is the index of the field description in the field-array 475 // The jfieldID is the offset of the field within the object 476 // It may also have hash bits for k, if VerifyJNIFields is turned on. 477 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 478 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 479 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 480 return ret; 481 JNI_END 482 483 484 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 485 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 486 487 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 488 JNIWrapper("ToReflectedMethod"); 489 490 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 491 492 jobject ret = NULL; 493 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 494 495 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 496 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 497 oop reflection_method; 498 if (m->is_initializer()) { 499 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 500 } else { 501 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 502 } 503 ret = JNIHandles::make_local(THREAD, reflection_method); 504 return ret; 505 JNI_END 506 507 DT_RETURN_MARK_DECL(GetSuperclass, jclass 508 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 509 510 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 511 JNIWrapper("GetSuperclass"); 512 513 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 514 515 jclass obj = NULL; 516 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 517 518 oop mirror = JNIHandles::resolve_non_null(sub); 519 // primitive classes return NULL 520 if (java_lang_Class::is_primitive(mirror)) return NULL; 521 522 // Rules of Class.getSuperClass as implemented by KLass::java_super: 523 // arrays return Object 524 // interfaces return NULL 525 // proper classes return Klass::super() 526 Klass* k = java_lang_Class::as_Klass(mirror); 527 if (k->is_interface()) return NULL; 528 529 // return mirror for superclass 530 Klass* super = k->java_super(); 531 // super2 is the value computed by the compiler's getSuperClass intrinsic: 532 debug_only(Klass* super2 = ( k->is_array_klass() 533 ? SystemDictionary::Object_klass() 534 : k->super() ) ); 535 assert(super == super2, 536 "java_super computation depends on interface, array, other super"); 537 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(THREAD, super->java_mirror()); 538 return obj; 539 JNI_END 540 541 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 542 JNIWrapper("IsSubclassOf"); 543 544 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 545 546 oop sub_mirror = JNIHandles::resolve_non_null(sub); 547 oop super_mirror = JNIHandles::resolve_non_null(super); 548 if (java_lang_Class::is_primitive(sub_mirror) || 549 java_lang_Class::is_primitive(super_mirror)) { 550 jboolean ret = (sub_mirror == super_mirror); 551 552 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 553 return ret; 554 } 555 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 556 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 557 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 558 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 559 JNI_TRUE : JNI_FALSE; 560 561 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 562 return ret; 563 JNI_END 564 565 566 DT_RETURN_MARK_DECL(Throw, jint 567 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 568 569 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 570 JNIWrapper("Throw"); 571 572 HOTSPOT_JNI_THROW_ENTRY(env, obj); 573 574 jint ret = JNI_OK; 575 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 576 577 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 578 ShouldNotReachHere(); 579 return 0; // Mute compiler. 580 JNI_END 581 582 583 DT_RETURN_MARK_DECL(ThrowNew, jint 584 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 585 586 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 587 JNIWrapper("ThrowNew"); 588 589 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 590 591 jint ret = JNI_OK; 592 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 593 594 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 595 Symbol* name = k->name(); 596 Handle class_loader (THREAD, k->class_loader()); 597 Handle protection_domain (THREAD, k->protection_domain()); 598 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 599 ShouldNotReachHere(); 600 return 0; // Mute compiler. 601 JNI_END 602 603 604 // JNI functions only transform a pending async exception to a synchronous 605 // exception in ExceptionOccurred and ExceptionCheck calls, since 606 // delivering an async exception in other places won't change the native 607 // code's control flow and would be harmful when native code further calls 608 // JNI functions with a pending exception. Async exception is also checked 609 // during the call, so ExceptionOccurred/ExceptionCheck won't return 610 // false but deliver the async exception at the very end during 611 // state transition. 612 613 static void jni_check_async_exceptions(JavaThread *thread) { 614 assert(thread == Thread::current(), "must be itself"); 615 thread->check_and_handle_async_exceptions(); 616 } 617 618 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 619 JNIWrapper("ExceptionOccurred"); 620 621 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 622 623 jni_check_async_exceptions(thread); 624 oop exception = thread->pending_exception(); 625 jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception); 626 627 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 628 return ret; 629 JNI_END 630 631 632 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 633 JNIWrapper("ExceptionDescribe"); 634 635 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 636 637 if (thread->has_pending_exception()) { 638 Handle ex(thread, thread->pending_exception()); 639 thread->clear_pending_exception(); 640 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 641 // Don't print anything if we are being killed. 642 } else { 643 jio_fprintf(defaultStream::error_stream(), "Exception "); 644 if (thread != NULL && thread->threadObj() != NULL) { 645 ResourceMark rm(THREAD); 646 jio_fprintf(defaultStream::error_stream(), 647 "in thread \"%s\" ", thread->get_thread_name()); 648 } 649 if (ex->is_a(SystemDictionary::Throwable_klass())) { 650 JavaValue result(T_VOID); 651 JavaCalls::call_virtual(&result, 652 ex, 653 SystemDictionary::Throwable_klass(), 654 vmSymbols::printStackTrace_name(), 655 vmSymbols::void_method_signature(), 656 THREAD); 657 // If an exception is thrown in the call it gets thrown away. Not much 658 // we can do with it. The native code that calls this, does not check 659 // for the exception - hence, it might still be in the thread when DestroyVM gets 660 // called, potentially causing a few asserts to trigger - since no pending exception 661 // is expected. 662 CLEAR_PENDING_EXCEPTION; 663 } else { 664 ResourceMark rm(THREAD); 665 jio_fprintf(defaultStream::error_stream(), 666 ". Uncaught exception of type %s.", 667 ex->klass()->external_name()); 668 } 669 } 670 } 671 672 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 673 JNI_END 674 675 676 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env)) 677 JNIWrapper("ExceptionClear"); 678 679 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 680 681 // The jni code might be using this API to clear java thrown exception. 682 // So just mark jvmti thread exception state as exception caught. 683 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 684 if (state != NULL && state->is_exception_detected()) { 685 state->set_exception_caught(); 686 } 687 thread->clear_pending_exception(); 688 689 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 690 JNI_END 691 692 693 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 694 JNIWrapper("FatalError"); 695 696 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 697 698 tty->print_cr("FATAL ERROR in native method: %s", msg); 699 thread->print_stack(); 700 os::abort(); // Dump core and abort 701 JNI_END 702 703 704 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 705 JNIWrapper("PushLocalFrame"); 706 707 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 708 709 //%note jni_11 710 if (capacity < 0 || 711 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 712 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 713 return JNI_ERR; 714 } 715 JNIHandleBlock* old_handles = thread->active_handles(); 716 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 717 assert(new_handles != NULL, "should not be NULL"); 718 new_handles->set_pop_frame_link(old_handles); 719 thread->set_active_handles(new_handles); 720 jint ret = JNI_OK; 721 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 722 return ret; 723 JNI_END 724 725 726 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 727 JNIWrapper("PopLocalFrame"); 728 729 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 730 731 //%note jni_11 732 Handle result_handle(thread, JNIHandles::resolve(result)); 733 JNIHandleBlock* old_handles = thread->active_handles(); 734 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 735 if (new_handles != NULL) { 736 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 737 // This way code will still work if PopLocalFrame is called without a corresponding 738 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 739 // the release_block call will release the blocks. 740 thread->set_active_handles(new_handles); 741 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 742 JNIHandleBlock::release_block(old_handles, thread); // may block 743 result = JNIHandles::make_local(thread, result_handle()); 744 } 745 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 746 return result; 747 JNI_END 748 749 750 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 751 JNIWrapper("NewGlobalRef"); 752 753 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 754 755 Handle ref_handle(thread, JNIHandles::resolve(ref)); 756 jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL); 757 758 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 759 return ret; 760 JNI_END 761 762 // Must be JNI_ENTRY (with HandleMark) 763 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 764 JNIWrapper("DeleteGlobalRef"); 765 766 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 767 768 JNIHandles::destroy_global(ref); 769 770 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 771 JNI_END 772 773 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 774 JNIWrapper("DeleteLocalRef"); 775 776 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 777 778 JNIHandles::destroy_local(obj); 779 780 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 781 JNI_END 782 783 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 784 JNIWrapper("IsSameObject"); 785 786 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 787 788 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 789 790 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 791 return ret; 792 JNI_END 793 794 795 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 796 JNIWrapper("NewLocalRef"); 797 798 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 799 800 jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref), 801 AllocFailStrategy::RETURN_NULL); 802 803 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 804 return ret; 805 JNI_END 806 807 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 808 JNIWrapper("EnsureLocalCapacity"); 809 810 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 811 812 jint ret; 813 if (capacity >= 0 && 814 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 815 ret = JNI_OK; 816 } else { 817 ret = JNI_ERR; 818 } 819 820 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 821 return ret; 822 JNI_END 823 824 // Return the Handle Type 825 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 826 JNIWrapper("GetObjectRefType"); 827 828 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 829 830 jobjectRefType ret = JNIInvalidRefType; 831 if (obj != NULL) { 832 ret = JNIHandles::handle_type(thread, obj); 833 } 834 835 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 836 return ret; 837 JNI_END 838 839 840 class JNI_ArgumentPusher : public SignatureIterator { 841 protected: 842 JavaCallArguments* _arguments; 843 844 void push_int(jint x) { _arguments->push_int(x); } 845 void push_long(jlong x) { _arguments->push_long(x); } 846 void push_float(jfloat x) { _arguments->push_float(x); } 847 void push_double(jdouble x) { _arguments->push_double(x); } 848 void push_object(jobject x) { _arguments->push_jobject(x); } 849 850 void push_boolean(jboolean b) { 851 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 852 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 853 // TemplateInterpreterGenerator::generate_result_handler_for and 854 // SharedRuntime::generate_native_wrapper. 855 push_int(b == 0 ? JNI_FALSE : JNI_TRUE); 856 } 857 858 JNI_ArgumentPusher(Method* method) 859 : SignatureIterator(method->signature(), 860 Fingerprinter(methodHandle(Thread::current(), method)).fingerprint()) 861 { 862 _arguments = NULL; 863 } 864 865 public: 866 virtual void push_arguments_on(JavaCallArguments* arguments) = 0; 867 }; 868 869 870 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 871 protected: 872 va_list _ap; 873 874 void set_ap(va_list rap) { 875 va_copy(_ap, rap); 876 } 877 878 friend class SignatureIterator; // so do_parameters_on can call do_type 879 void do_type(BasicType type) { 880 switch (type) { 881 // these are coerced to int when using va_arg 882 case T_BYTE: 883 case T_CHAR: 884 case T_SHORT: 885 case T_INT: push_int(va_arg(_ap, jint)); break; 886 case T_BOOLEAN: push_boolean((jboolean) va_arg(_ap, jint)); break; 887 888 // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 889 890 case T_LONG: push_long(va_arg(_ap, jlong)); break; 891 // float is coerced to double w/ va_arg 892 case T_FLOAT: push_float((jfloat) va_arg(_ap, jdouble)); break; 893 case T_DOUBLE: push_double(va_arg(_ap, jdouble)); break; 894 895 case T_ARRAY: 896 case T_OBJECT: push_object(va_arg(_ap, jobject)); break; 897 default: ShouldNotReachHere(); 898 } 899 } 900 901 public: 902 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 903 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 904 set_ap(rap); 905 } 906 907 virtual void push_arguments_on(JavaCallArguments* arguments) { 908 _arguments = arguments; 909 do_parameters_on(this); 910 } 911 }; 912 913 914 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 915 protected: 916 const jvalue *_ap; 917 918 inline void set_ap(const jvalue *rap) { _ap = rap; } 919 920 friend class SignatureIterator; // so do_parameters_on can call do_type 921 void do_type(BasicType type) { 922 switch (type) { 923 case T_CHAR: push_int((_ap++)->c); break; 924 case T_SHORT: push_int((_ap++)->s); break; 925 case T_BYTE: push_int((_ap++)->b); break; 926 case T_INT: push_int((_ap++)->i); break; 927 case T_BOOLEAN: push_boolean((_ap++)->z); break; 928 case T_LONG: push_long((_ap++)->j); break; 929 case T_FLOAT: push_float((_ap++)->f); break; 930 case T_DOUBLE: push_double((_ap++)->d); break; 931 case T_ARRAY: 932 case T_OBJECT: push_object((_ap++)->l); break; 933 default: ShouldNotReachHere(); 934 } 935 } 936 937 public: 938 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 939 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) { 940 set_ap(rap); 941 } 942 943 virtual void push_arguments_on(JavaCallArguments* arguments) { 944 _arguments = arguments; 945 do_parameters_on(this); 946 } 947 }; 948 949 950 enum JNICallType { 951 JNI_STATIC, 952 JNI_VIRTUAL, 953 JNI_NONVIRTUAL 954 }; 955 956 957 958 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 959 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 960 961 // Create object to hold arguments for the JavaCall, and associate it with 962 // the jni parser 963 ResourceMark rm(THREAD); 964 int number_of_parameters = method->size_of_parameters(); 965 JavaCallArguments java_args(number_of_parameters); 966 967 assert(method->is_static(), "method should be static"); 968 969 // Fill out JavaCallArguments object 970 args->push_arguments_on(&java_args); 971 // Initialize result type 972 result->set_type(args->return_type()); 973 974 // Invoke the method. Result is returned as oop. 975 JavaCalls::call(result, method, &java_args, CHECK); 976 977 // Convert result 978 if (is_reference_type(result->get_type())) { 979 result->set_jobject(JNIHandles::make_local(THREAD, (oop) result->get_jobject())); 980 } 981 } 982 983 984 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 985 oop recv = JNIHandles::resolve(receiver); 986 if (recv == NULL) { 987 THROW(vmSymbols::java_lang_NullPointerException()); 988 } 989 Handle h_recv(THREAD, recv); 990 991 int number_of_parameters; 992 Method* selected_method; 993 { 994 Method* m = Method::resolve_jmethod_id(method_id); 995 number_of_parameters = m->size_of_parameters(); 996 Klass* holder = m->method_holder(); 997 if (call_type != JNI_VIRTUAL) { 998 selected_method = m; 999 } else if (!m->has_itable_index()) { 1000 // non-interface call -- for that little speed boost, don't handlize 1001 debug_only(NoSafepointVerifier nosafepoint;) 1002 // jni_GetMethodID makes sure class is linked and initialized 1003 // so m should have a valid vtable index. 1004 assert(m->valid_vtable_index(), "no valid vtable index"); 1005 int vtbl_index = m->vtable_index(); 1006 if (vtbl_index != Method::nonvirtual_vtable_index) { 1007 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1008 } else { 1009 // final method 1010 selected_method = m; 1011 } 1012 } else { 1013 // interface call 1014 int itbl_index = m->itable_index(); 1015 Klass* k = h_recv->klass(); 1016 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1017 } 1018 } 1019 1020 methodHandle method(THREAD, selected_method); 1021 1022 // Create object to hold arguments for the JavaCall, and associate it with 1023 // the jni parser 1024 ResourceMark rm(THREAD); 1025 JavaCallArguments java_args(number_of_parameters); 1026 1027 // handle arguments 1028 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1029 java_args.push_oop(h_recv); // Push jobject handle 1030 1031 // Fill out JavaCallArguments object 1032 args->push_arguments_on(&java_args); 1033 // Initialize result type 1034 result->set_type(args->return_type()); 1035 1036 // Invoke the method. Result is returned as oop. 1037 JavaCalls::call(result, method, &java_args, CHECK); 1038 1039 // Convert result 1040 if (is_reference_type(result->get_type())) { 1041 result->set_jobject(JNIHandles::make_local(THREAD, (oop) result->get_jobject())); 1042 } 1043 } 1044 1045 DT_RETURN_MARK_DECL(AllocObject, jobject 1046 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1047 1048 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1049 JNIWrapper("AllocObject"); 1050 1051 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1052 1053 jobject ret = NULL; 1054 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1055 1056 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1057 ret = JNIHandles::make_local(THREAD, i); 1058 return ret; 1059 JNI_END 1060 1061 DT_RETURN_MARK_DECL(NewObjectA, jobject 1062 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1063 1064 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1065 JNIWrapper("NewObjectA"); 1066 1067 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1068 1069 jobject obj = NULL; 1070 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1071 1072 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1073 obj = JNIHandles::make_local(THREAD, i); 1074 JavaValue jvalue(T_VOID); 1075 JNI_ArgumentPusherArray ap(methodID, args); 1076 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1077 return obj; 1078 JNI_END 1079 1080 1081 DT_RETURN_MARK_DECL(NewObjectV, jobject 1082 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1083 1084 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1085 JNIWrapper("NewObjectV"); 1086 1087 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1088 1089 jobject obj = NULL; 1090 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1091 1092 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1093 obj = JNIHandles::make_local(THREAD, i); 1094 JavaValue jvalue(T_VOID); 1095 JNI_ArgumentPusherVaArg ap(methodID, args); 1096 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1097 return obj; 1098 JNI_END 1099 1100 1101 DT_RETURN_MARK_DECL(NewObject, jobject 1102 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1103 1104 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1105 JNIWrapper("NewObject"); 1106 1107 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1108 1109 jobject obj = NULL; 1110 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1111 1112 instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL); 1113 obj = JNIHandles::make_local(THREAD, i); 1114 va_list args; 1115 va_start(args, methodID); 1116 JavaValue jvalue(T_VOID); 1117 JNI_ArgumentPusherVaArg ap(methodID, args); 1118 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1119 va_end(args); 1120 return obj; 1121 JNI_END 1122 1123 1124 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1125 JNIWrapper("GetObjectClass"); 1126 1127 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1128 1129 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1130 jclass ret = 1131 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1132 1133 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1134 return ret; 1135 JNI_END 1136 1137 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1138 JNIWrapper("IsInstanceOf"); 1139 1140 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1141 1142 jboolean ret = JNI_TRUE; 1143 if (obj != NULL) { 1144 ret = JNI_FALSE; 1145 Klass* k = java_lang_Class::as_Klass( 1146 JNIHandles::resolve_non_null(clazz)); 1147 if (k != NULL) { 1148 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1149 } 1150 } 1151 1152 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1153 return ret; 1154 JNI_END 1155 1156 1157 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1158 const char *sig, bool is_static, TRAPS) { 1159 // %%%% This code should probably just call into a method in the LinkResolver 1160 // 1161 // The class should have been loaded (we have an instance of the class 1162 // passed in) so the method and signature should already be in the symbol 1163 // table. If they're not there, the method doesn't exist. 1164 const char *name_to_probe = (name_str == NULL) 1165 ? vmSymbols::object_initializer_name()->as_C_string() 1166 : name_str; 1167 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1168 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1169 1170 if (name == NULL || signature == NULL) { 1171 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1172 } 1173 1174 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1175 1176 // Throw a NoSuchMethodError exception if we have an instance of a 1177 // primitive java.lang.Class 1178 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1179 ResourceMark rm; 1180 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1181 } 1182 1183 // Make sure class is linked and initialized before handing id's out to 1184 // Method*s. 1185 klass->initialize(CHECK_NULL); 1186 1187 Method* m; 1188 if (name == vmSymbols::object_initializer_name() || 1189 name == vmSymbols::class_initializer_name()) { 1190 // Never search superclasses for constructors 1191 if (klass->is_instance_klass()) { 1192 m = InstanceKlass::cast(klass)->find_method(name, signature); 1193 } else { 1194 m = NULL; 1195 } 1196 } else { 1197 m = klass->lookup_method(name, signature); 1198 if (m == NULL && klass->is_instance_klass()) { 1199 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1200 } 1201 } 1202 if (m == NULL || (m->is_static() != is_static)) { 1203 ResourceMark rm; 1204 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1205 } 1206 return m->jmethod_id(); 1207 } 1208 1209 1210 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1211 const char *name, const char *sig)) 1212 JNIWrapper("GetMethodID"); 1213 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1214 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1215 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1216 return ret; 1217 JNI_END 1218 1219 1220 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1221 const char *name, const char *sig)) 1222 JNIWrapper("GetStaticMethodID"); 1223 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1224 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1225 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1226 return ret; 1227 JNI_END 1228 1229 1230 1231 // 1232 // Calling Methods 1233 // 1234 1235 1236 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1237 , EntryProbe, ReturnProbe) \ 1238 \ 1239 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1240 , ReturnProbe); \ 1241 \ 1242 JNI_ENTRY(ResultType, \ 1243 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1244 JNIWrapper("Call" XSTR(Result) "Method"); \ 1245 \ 1246 EntryProbe; \ 1247 ResultType ret = 0;\ 1248 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1249 (const ResultType&)ret);\ 1250 \ 1251 va_list args; \ 1252 va_start(args, methodID); \ 1253 JavaValue jvalue(Tag); \ 1254 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1255 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1256 va_end(args); \ 1257 ret = jvalue.get_##ResultType(); \ 1258 return ret;\ 1259 JNI_END 1260 1261 // the runtime type of subword integral basic types is integer 1262 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1263 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1264 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1265 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1266 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1267 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1268 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1269 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1270 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1271 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1272 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1273 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1274 1275 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1276 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1277 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1278 DEFINE_CALLMETHOD(jint, Int, T_INT, 1279 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1280 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1281 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1282 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1283 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1284 // Float and double probes don't return value because dtrace doesn't currently support it 1285 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1286 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1287 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1288 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1289 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1290 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1291 1292 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1293 , EntryProbe, ReturnProbe) \ 1294 \ 1295 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1296 , ReturnProbe); \ 1297 \ 1298 JNI_ENTRY(ResultType, \ 1299 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1300 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1301 \ 1302 EntryProbe;\ 1303 ResultType ret = 0;\ 1304 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1305 (const ResultType&)ret);\ 1306 \ 1307 JavaValue jvalue(Tag); \ 1308 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1309 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1310 ret = jvalue.get_##ResultType(); \ 1311 return ret;\ 1312 JNI_END 1313 1314 // the runtime type of subword integral basic types is integer 1315 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1316 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1317 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1318 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1319 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1320 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1321 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1322 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1323 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1324 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1325 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1326 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1327 1328 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1329 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1330 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1331 DEFINE_CALLMETHODV(jint, Int, T_INT, 1332 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1333 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1334 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1335 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1336 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1337 // Float and double probes don't return value because dtrace doesn't currently support it 1338 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1339 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1340 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1341 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1342 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1343 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1344 1345 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1346 , EntryProbe, ReturnProbe) \ 1347 \ 1348 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1349 , ReturnProbe); \ 1350 \ 1351 JNI_ENTRY(ResultType, \ 1352 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1353 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1354 EntryProbe; \ 1355 ResultType ret = 0;\ 1356 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1357 (const ResultType&)ret);\ 1358 \ 1359 JavaValue jvalue(Tag); \ 1360 JNI_ArgumentPusherArray ap(methodID, args); \ 1361 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1362 ret = jvalue.get_##ResultType(); \ 1363 return ret;\ 1364 JNI_END 1365 1366 // the runtime type of subword integral basic types is integer 1367 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1368 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1369 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1370 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1371 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1372 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1373 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1374 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1375 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1376 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1377 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1378 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1379 1380 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1381 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1382 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1383 DEFINE_CALLMETHODA(jint, Int, T_INT, 1384 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1385 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1386 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1387 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1388 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1389 // Float and double probes don't return value because dtrace doesn't currently support it 1390 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1391 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1392 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1393 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1394 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1395 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1396 1397 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1398 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1399 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1400 1401 1402 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1403 JNIWrapper("CallVoidMethod"); 1404 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1405 DT_VOID_RETURN_MARK(CallVoidMethod); 1406 1407 va_list args; 1408 va_start(args, methodID); 1409 JavaValue jvalue(T_VOID); 1410 JNI_ArgumentPusherVaArg ap(methodID, args); 1411 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1412 va_end(args); 1413 JNI_END 1414 1415 1416 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1417 JNIWrapper("CallVoidMethodV"); 1418 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1419 DT_VOID_RETURN_MARK(CallVoidMethodV); 1420 1421 JavaValue jvalue(T_VOID); 1422 JNI_ArgumentPusherVaArg ap(methodID, args); 1423 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1424 JNI_END 1425 1426 1427 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1428 JNIWrapper("CallVoidMethodA"); 1429 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1430 DT_VOID_RETURN_MARK(CallVoidMethodA); 1431 1432 JavaValue jvalue(T_VOID); 1433 JNI_ArgumentPusherArray ap(methodID, args); 1434 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1435 JNI_END 1436 1437 1438 1439 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1440 , EntryProbe, ReturnProbe) \ 1441 \ 1442 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1443 , ReturnProbe);\ 1444 \ 1445 JNI_ENTRY(ResultType, \ 1446 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1447 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1448 \ 1449 EntryProbe;\ 1450 ResultType ret;\ 1451 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1452 (const ResultType&)ret);\ 1453 \ 1454 va_list args; \ 1455 va_start(args, methodID); \ 1456 JavaValue jvalue(Tag); \ 1457 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1458 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1459 va_end(args); \ 1460 ret = jvalue.get_##ResultType(); \ 1461 return ret;\ 1462 JNI_END 1463 1464 // the runtime type of subword integral basic types is integer 1465 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1466 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1467 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1468 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1469 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1470 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1471 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1472 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1473 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1474 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1475 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1477 1478 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1479 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1481 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1482 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1484 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1485 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1486 // Float and double probes don't return value because dtrace doesn't currently support it 1487 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1488 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1489 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1491 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1492 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1494 1495 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1496 , EntryProbe, ReturnProbe) \ 1497 \ 1498 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1499 , ReturnProbe);\ 1500 \ 1501 JNI_ENTRY(ResultType, \ 1502 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1503 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1504 \ 1505 EntryProbe;\ 1506 ResultType ret;\ 1507 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1508 (const ResultType&)ret);\ 1509 \ 1510 JavaValue jvalue(Tag); \ 1511 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1512 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1513 ret = jvalue.get_##ResultType(); \ 1514 return ret;\ 1515 JNI_END 1516 1517 // the runtime type of subword integral basic types is integer 1518 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1519 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1520 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1521 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1522 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1523 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1524 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1525 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1526 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1527 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1528 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1530 1531 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1532 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1533 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1534 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1535 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1537 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1538 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1539 // Float and double probes don't return value because dtrace doesn't currently support it 1540 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1541 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1542 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1543 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1544 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1545 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1546 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1547 1548 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1549 , EntryProbe, ReturnProbe) \ 1550 \ 1551 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1552 , ReturnProbe);\ 1553 \ 1554 JNI_ENTRY(ResultType, \ 1555 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1556 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1557 \ 1558 EntryProbe;\ 1559 ResultType ret;\ 1560 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1561 (const ResultType&)ret);\ 1562 \ 1563 JavaValue jvalue(Tag); \ 1564 JNI_ArgumentPusherArray ap(methodID, args); \ 1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1566 ret = jvalue.get_##ResultType(); \ 1567 return ret;\ 1568 JNI_END 1569 1570 // the runtime type of subword integral basic types is integer 1571 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1572 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1573 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1574 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1575 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1576 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1577 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1578 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1579 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1580 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1581 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1582 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1583 1584 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1585 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1586 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1587 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1588 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1589 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1590 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1591 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1592 // Float and double probes don't return value because dtrace doesn't currently support it 1593 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1594 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1595 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1596 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1597 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1598 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1599 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1600 1601 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1602 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1603 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1604 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1605 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1606 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1607 1608 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1609 JNIWrapper("CallNonvirtualVoidMethod"); 1610 1611 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1612 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1613 1614 va_list args; 1615 va_start(args, methodID); 1616 JavaValue jvalue(T_VOID); 1617 JNI_ArgumentPusherVaArg ap(methodID, args); 1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1619 va_end(args); 1620 JNI_END 1621 1622 1623 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1624 JNIWrapper("CallNonvirtualVoidMethodV"); 1625 1626 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1627 env, obj, cls, (uintptr_t) methodID); 1628 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1629 1630 JavaValue jvalue(T_VOID); 1631 JNI_ArgumentPusherVaArg ap(methodID, args); 1632 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1633 JNI_END 1634 1635 1636 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1637 JNIWrapper("CallNonvirtualVoidMethodA"); 1638 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1639 env, obj, cls, (uintptr_t) methodID); 1640 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1641 JavaValue jvalue(T_VOID); 1642 JNI_ArgumentPusherArray ap(methodID, args); 1643 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1644 JNI_END 1645 1646 1647 1648 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1649 , EntryProbe, ResultProbe) \ 1650 \ 1651 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1652 , ResultProbe); \ 1653 \ 1654 JNI_ENTRY(ResultType, \ 1655 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1656 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1657 \ 1658 EntryProbe; \ 1659 ResultType ret = 0;\ 1660 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1661 (const ResultType&)ret);\ 1662 \ 1663 va_list args; \ 1664 va_start(args, methodID); \ 1665 JavaValue jvalue(Tag); \ 1666 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1667 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1668 va_end(args); \ 1669 ret = jvalue.get_##ResultType(); \ 1670 return ret;\ 1671 JNI_END 1672 1673 // the runtime type of subword integral basic types is integer 1674 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1675 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1676 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1677 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1678 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1680 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1681 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1683 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1684 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1685 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1686 1687 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1688 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1690 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1691 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1692 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1693 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1694 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1695 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1696 // Float and double probes don't return value because dtrace doesn't currently support it 1697 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1698 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1699 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1700 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1701 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1702 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1703 1704 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1705 , EntryProbe, ResultProbe) \ 1706 \ 1707 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1708 , ResultProbe); \ 1709 \ 1710 JNI_ENTRY(ResultType, \ 1711 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1712 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1713 \ 1714 EntryProbe; \ 1715 ResultType ret = 0;\ 1716 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1717 (const ResultType&)ret);\ 1718 \ 1719 JavaValue jvalue(Tag); \ 1720 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1721 /* Make sure class is initialized before trying to invoke its method */ \ 1722 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1723 k->initialize(CHECK_0); \ 1724 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1725 va_end(args); \ 1726 ret = jvalue.get_##ResultType(); \ 1727 return ret;\ 1728 JNI_END 1729 1730 // the runtime type of subword integral basic types is integer 1731 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1732 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1734 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1735 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1737 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1738 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1740 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1741 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1743 1744 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1745 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1747 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1748 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1750 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1751 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1752 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1753 // Float and double probes don't return value because dtrace doesn't currently support it 1754 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1755 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1756 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1757 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1758 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1759 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1760 1761 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1762 , EntryProbe, ResultProbe) \ 1763 \ 1764 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1765 , ResultProbe); \ 1766 \ 1767 JNI_ENTRY(ResultType, \ 1768 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1769 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1770 \ 1771 EntryProbe; \ 1772 ResultType ret = 0;\ 1773 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1774 (const ResultType&)ret);\ 1775 \ 1776 JavaValue jvalue(Tag); \ 1777 JNI_ArgumentPusherArray ap(methodID, args); \ 1778 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1779 ret = jvalue.get_##ResultType(); \ 1780 return ret;\ 1781 JNI_END 1782 1783 // the runtime type of subword integral basic types is integer 1784 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1785 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1786 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1787 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1788 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1789 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1790 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1791 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1792 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1793 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1794 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1795 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1796 1797 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1798 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1799 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1800 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1801 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1802 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1803 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1804 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1805 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1806 // Float and double probes don't return value because dtrace doesn't currently support it 1807 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1808 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1809 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1810 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1811 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1812 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1813 1814 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1815 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1816 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1817 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1818 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1819 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1820 1821 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1822 JNIWrapper("CallStaticVoidMethod"); 1823 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1824 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1825 1826 va_list args; 1827 va_start(args, methodID); 1828 JavaValue jvalue(T_VOID); 1829 JNI_ArgumentPusherVaArg ap(methodID, args); 1830 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1831 va_end(args); 1832 JNI_END 1833 1834 1835 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1836 JNIWrapper("CallStaticVoidMethodV"); 1837 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1838 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1839 1840 JavaValue jvalue(T_VOID); 1841 JNI_ArgumentPusherVaArg ap(methodID, args); 1842 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1843 JNI_END 1844 1845 1846 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1847 JNIWrapper("CallStaticVoidMethodA"); 1848 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1849 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1850 1851 JavaValue jvalue(T_VOID); 1852 JNI_ArgumentPusherArray ap(methodID, args); 1853 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1854 JNI_END 1855 1856 1857 // 1858 // Accessing Fields 1859 // 1860 1861 1862 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 1863 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 1864 1865 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1866 const char *name, const char *sig)) 1867 JNIWrapper("GetFieldID"); 1868 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 1869 jfieldID ret = 0; 1870 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1871 1872 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1873 1874 // The class should have been loaded (we have an instance of the class 1875 // passed in) so the field and signature should already be in the symbol 1876 // table. If they're not there, the field doesn't exist. 1877 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 1878 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 1879 if (fieldname == NULL || signame == NULL) { 1880 ResourceMark rm; 1881 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1882 } 1883 1884 // Make sure class is initialized before handing id's out to fields 1885 k->initialize(CHECK_NULL); 1886 1887 fieldDescriptor fd; 1888 if (!k->is_instance_klass() || 1889 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 1890 ResourceMark rm; 1891 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 1892 } 1893 1894 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1895 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1896 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 1897 return ret; 1898 JNI_END 1899 1900 1901 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1902 JNIWrapper("GetObjectField"); 1903 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 1904 oop o = JNIHandles::resolve_non_null(obj); 1905 Klass* k = o->klass(); 1906 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1907 // Keep JVMTI addition small and only check enabled flag here. 1908 // jni_GetField_probe() assumes that is okay to create handles. 1909 if (JvmtiExport::should_post_field_access()) { 1910 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1911 } 1912 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 1913 jobject ret = JNIHandles::make_local(THREAD, loaded_obj); 1914 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 1915 return ret; 1916 JNI_END 1917 1918 1919 1920 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 1921 , EntryProbe, ReturnProbe) \ 1922 \ 1923 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 1924 , ReturnProbe); \ 1925 \ 1926 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1927 JNIWrapper("Get" XSTR(Result) "Field"); \ 1928 \ 1929 EntryProbe; \ 1930 Return ret = 0;\ 1931 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1932 \ 1933 oop o = JNIHandles::resolve_non_null(obj); \ 1934 Klass* k = o->klass(); \ 1935 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1936 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1937 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 1938 /* and creates a ResetNoHandleMark. */ \ 1939 if (JvmtiExport::should_post_field_access()) { \ 1940 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 1941 } \ 1942 ret = o->Fieldname##_field(offset); \ 1943 return ret; \ 1944 JNI_END 1945 1946 DEFINE_GETFIELD(jboolean, bool, Boolean 1947 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1948 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 1949 DEFINE_GETFIELD(jbyte, byte, Byte 1950 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1951 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 1952 DEFINE_GETFIELD(jchar, char, Char 1953 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1954 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 1955 DEFINE_GETFIELD(jshort, short, Short 1956 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1957 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 1958 DEFINE_GETFIELD(jint, int, Int 1959 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1960 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 1961 DEFINE_GETFIELD(jlong, long, Long 1962 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1963 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 1964 // Float and double probes don't return value because dtrace doesn't currently support it 1965 DEFINE_GETFIELD(jfloat, float, Float 1966 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1967 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 1968 DEFINE_GETFIELD(jdouble, double, Double 1969 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 1970 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 1971 1972 address jni_GetBooleanField_addr() { 1973 return (address)jni_GetBooleanField; 1974 } 1975 address jni_GetByteField_addr() { 1976 return (address)jni_GetByteField; 1977 } 1978 address jni_GetCharField_addr() { 1979 return (address)jni_GetCharField; 1980 } 1981 address jni_GetShortField_addr() { 1982 return (address)jni_GetShortField; 1983 } 1984 address jni_GetIntField_addr() { 1985 return (address)jni_GetIntField; 1986 } 1987 address jni_GetLongField_addr() { 1988 return (address)jni_GetLongField; 1989 } 1990 address jni_GetFloatField_addr() { 1991 return (address)jni_GetFloatField; 1992 } 1993 address jni_GetDoubleField_addr() { 1994 return (address)jni_GetDoubleField; 1995 } 1996 1997 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1998 JNIWrapper("SetObjectField"); 1999 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2000 oop o = JNIHandles::resolve_non_null(obj); 2001 Klass* k = o->klass(); 2002 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2003 // Keep JVMTI addition small and only check enabled flag here. 2004 // jni_SetField_probe_nh() assumes that is not okay to create handles 2005 // and creates a ResetNoHandleMark. 2006 if (JvmtiExport::should_post_field_modification()) { 2007 jvalue field_value; 2008 field_value.l = value; 2009 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2010 } 2011 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2012 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2013 JNI_END 2014 2015 2016 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2017 , EntryProbe, ReturnProbe) \ 2018 \ 2019 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2020 JNIWrapper("Set" XSTR(Result) "Field"); \ 2021 \ 2022 EntryProbe; \ 2023 \ 2024 oop o = JNIHandles::resolve_non_null(obj); \ 2025 Klass* k = o->klass(); \ 2026 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2027 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2028 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2029 /* and creates a ResetNoHandleMark. */ \ 2030 if (JvmtiExport::should_post_field_modification()) { \ 2031 jvalue field_value; \ 2032 field_value.unionType = value; \ 2033 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2034 } \ 2035 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 2036 o->Fieldname##_field_put(offset, value); \ 2037 ReturnProbe; \ 2038 JNI_END 2039 2040 DEFINE_SETFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2041 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2042 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2043 DEFINE_SETFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2044 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2045 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2046 DEFINE_SETFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2047 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2048 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2049 DEFINE_SETFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2050 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2051 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2052 DEFINE_SETFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2053 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2054 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2055 DEFINE_SETFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2056 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2057 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2058 // Float and double probes don't return value because dtrace doesn't currently support it 2059 DEFINE_SETFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2060 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2061 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2062 DEFINE_SETFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2063 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2064 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2065 2066 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2067 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2068 2069 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2070 JNIWrapper("ToReflectedField"); 2071 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2072 jobject ret = NULL; 2073 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2074 2075 fieldDescriptor fd; 2076 bool found = false; 2077 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2078 2079 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2080 2081 if (isStatic) { 2082 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2083 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2084 assert(id->is_static_field_id(), "invalid static field id"); 2085 found = id->find_local_field(&fd); 2086 } else { 2087 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2088 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2089 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2090 } 2091 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2092 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2093 ret = JNIHandles::make_local(THREAD, reflected); 2094 return ret; 2095 JNI_END 2096 2097 2098 // 2099 // Accessing Static Fields 2100 // 2101 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2102 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2103 2104 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2105 const char *name, const char *sig)) 2106 JNIWrapper("GetStaticFieldID"); 2107 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2108 jfieldID ret = NULL; 2109 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2110 2111 // The class should have been loaded (we have an instance of the class 2112 // passed in) so the field and signature should already be in the symbol 2113 // table. If they're not there, the field doesn't exist. 2114 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2115 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2116 if (fieldname == NULL || signame == NULL) { 2117 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2118 } 2119 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2120 // Make sure class is initialized before handing id's out to static fields 2121 k->initialize(CHECK_NULL); 2122 2123 fieldDescriptor fd; 2124 if (!k->is_instance_klass() || 2125 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2126 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2127 } 2128 2129 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2130 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2131 debug_only(id->set_is_static_field_id();) 2132 2133 debug_only(id->verify(fd.field_holder())); 2134 2135 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2136 return ret; 2137 JNI_END 2138 2139 2140 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2141 JNIWrapper("GetStaticObjectField"); 2142 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2143 #if INCLUDE_JNI_CHECK 2144 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2145 #endif // INCLUDE_JNI_CHECK 2146 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2147 assert(id->is_static_field_id(), "invalid static field id"); 2148 // Keep JVMTI addition small and only check enabled flag here. 2149 // jni_GetField_probe() assumes that is okay to create handles. 2150 if (JvmtiExport::should_post_field_access()) { 2151 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2152 } 2153 jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset())); 2154 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2155 return ret; 2156 JNI_END 2157 2158 2159 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2160 , EntryProbe, ReturnProbe) \ 2161 \ 2162 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2163 , ReturnProbe); \ 2164 \ 2165 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2166 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2167 EntryProbe; \ 2168 Return ret = 0;\ 2169 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2170 (const Return&)ret);\ 2171 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2172 assert(id->is_static_field_id(), "invalid static field id"); \ 2173 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2174 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2175 if (JvmtiExport::should_post_field_access()) { \ 2176 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2177 } \ 2178 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2179 return ret;\ 2180 JNI_END 2181 2182 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2183 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2184 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2185 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2186 DEFINE_GETSTATICFIELD(jchar, char, Char 2187 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2188 DEFINE_GETSTATICFIELD(jshort, short, Short 2189 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2190 DEFINE_GETSTATICFIELD(jint, int, Int 2191 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2192 DEFINE_GETSTATICFIELD(jlong, long, Long 2193 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2194 // Float and double probes don't return value because dtrace doesn't currently support it 2195 DEFINE_GETSTATICFIELD(jfloat, float, Float 2196 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2197 DEFINE_GETSTATICFIELD(jdouble, double, Double 2198 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2199 2200 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2201 JNIWrapper("SetStaticObjectField"); 2202 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2203 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2204 assert(id->is_static_field_id(), "invalid static field id"); 2205 // Keep JVMTI addition small and only check enabled flag here. 2206 // jni_SetField_probe() assumes that is okay to create handles. 2207 if (JvmtiExport::should_post_field_modification()) { 2208 jvalue field_value; 2209 field_value.l = value; 2210 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value); 2211 } 2212 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2213 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2214 JNI_END 2215 2216 2217 2218 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2219 , EntryProbe, ReturnProbe) \ 2220 \ 2221 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2222 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2223 EntryProbe; \ 2224 \ 2225 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2226 assert(id->is_static_field_id(), "invalid static field id"); \ 2227 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2228 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2229 if (JvmtiExport::should_post_field_modification()) { \ 2230 jvalue field_value; \ 2231 field_value.unionType = value; \ 2232 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2233 } \ 2234 if (SigType == JVM_SIGNATURE_BOOLEAN) { value = ((jboolean)value) & 1; } \ 2235 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2236 ReturnProbe;\ 2237 JNI_END 2238 2239 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, JVM_SIGNATURE_BOOLEAN, z 2240 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2241 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2242 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, JVM_SIGNATURE_BYTE, b 2243 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2244 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2245 DEFINE_SETSTATICFIELD(jchar, char, Char, JVM_SIGNATURE_CHAR, c 2246 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2247 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2248 DEFINE_SETSTATICFIELD(jshort, short, Short, JVM_SIGNATURE_SHORT, s 2249 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2250 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2251 DEFINE_SETSTATICFIELD(jint, int, Int, JVM_SIGNATURE_INT, i 2252 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2253 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2254 DEFINE_SETSTATICFIELD(jlong, long, Long, JVM_SIGNATURE_LONG, j 2255 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2256 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2257 // Float and double probes don't return value because dtrace doesn't currently support it 2258 DEFINE_SETSTATICFIELD(jfloat, float, Float, JVM_SIGNATURE_FLOAT, f 2259 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2260 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2261 DEFINE_SETSTATICFIELD(jdouble, double, Double, JVM_SIGNATURE_DOUBLE, d 2262 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2263 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2264 2265 // 2266 // String Operations 2267 // 2268 2269 // Unicode Interface 2270 2271 DT_RETURN_MARK_DECL(NewString, jstring 2272 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2273 2274 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2275 JNIWrapper("NewString"); 2276 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2277 jstring ret = NULL; 2278 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2279 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2280 ret = (jstring) JNIHandles::make_local(THREAD, string); 2281 return ret; 2282 JNI_END 2283 2284 2285 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2286 JNIWrapper("GetStringLength"); 2287 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2288 jsize ret = 0; 2289 oop s = JNIHandles::resolve_non_null(string); 2290 ret = java_lang_String::length(s); 2291 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2292 return ret; 2293 JNI_END 2294 2295 2296 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars( 2297 JNIEnv *env, jstring string, jboolean *isCopy)) 2298 JNIWrapper("GetStringChars"); 2299 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2300 jchar* buf = NULL; 2301 oop s = JNIHandles::resolve_non_null(string); 2302 typeArrayOop s_value = java_lang_String::value(s); 2303 if (s_value != NULL) { 2304 int s_len = java_lang_String::length(s, s_value); 2305 bool is_latin1 = java_lang_String::is_latin1(s); 2306 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2307 /* JNI Specification states return NULL on OOM */ 2308 if (buf != NULL) { 2309 if (s_len > 0) { 2310 if (!is_latin1) { 2311 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2312 buf, s_len); 2313 } else { 2314 for (int i = 0; i < s_len; i++) { 2315 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2316 } 2317 } 2318 } 2319 buf[s_len] = 0; 2320 //%note jni_5 2321 if (isCopy != NULL) { 2322 *isCopy = JNI_TRUE; 2323 } 2324 } 2325 } 2326 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2327 return buf; 2328 JNI_END 2329 2330 2331 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2332 JNIWrapper("ReleaseStringChars"); 2333 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2334 //%note jni_6 2335 if (chars != NULL) { 2336 // Since String objects are supposed to be immutable, don't copy any 2337 // new data back. A bad user will have to go after the char array. 2338 FreeHeap((void*) chars); 2339 } 2340 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2341 JNI_END 2342 2343 2344 // UTF Interface 2345 2346 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2347 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2348 2349 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2350 JNIWrapper("NewStringUTF"); 2351 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2352 jstring ret; 2353 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2354 2355 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2356 ret = (jstring) JNIHandles::make_local(THREAD, result); 2357 return ret; 2358 JNI_END 2359 2360 2361 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2362 JNIWrapper("GetStringUTFLength"); 2363 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2364 oop java_string = JNIHandles::resolve_non_null(string); 2365 jsize ret = java_lang_String::utf8_length(java_string); 2366 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2367 return ret; 2368 JNI_END 2369 2370 2371 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2372 JNIWrapper("GetStringUTFChars"); 2373 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2374 char* result = NULL; 2375 oop java_string = JNIHandles::resolve_non_null(string); 2376 typeArrayOop s_value = java_lang_String::value(java_string); 2377 if (s_value != NULL) { 2378 size_t length = java_lang_String::utf8_length(java_string, s_value); 2379 /* JNI Specification states return NULL on OOM */ 2380 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2381 if (result != NULL) { 2382 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2383 if (isCopy != NULL) { 2384 *isCopy = JNI_TRUE; 2385 } 2386 } 2387 } 2388 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2389 return result; 2390 JNI_END 2391 2392 2393 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2394 JNIWrapper("ReleaseStringUTFChars"); 2395 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2396 if (chars != NULL) { 2397 FreeHeap((char*) chars); 2398 } 2399 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2400 JNI_END 2401 2402 2403 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2404 JNIWrapper("GetArrayLength"); 2405 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2406 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2407 assert(a->is_array(), "must be array"); 2408 jsize ret = a->length(); 2409 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2410 return ret; 2411 JNI_END 2412 2413 2414 // 2415 // Object Array Operations 2416 // 2417 2418 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2419 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2420 2421 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2422 JNIWrapper("NewObjectArray"); 2423 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2424 jobjectArray ret = NULL; 2425 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2426 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2427 Klass* ak = ek->array_klass(CHECK_NULL); 2428 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2429 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2430 oop initial_value = JNIHandles::resolve(initialElement); 2431 if (initial_value != NULL) { // array already initialized with NULL 2432 for (int index = 0; index < length; index++) { 2433 result->obj_at_put(index, initial_value); 2434 } 2435 } 2436 ret = (jobjectArray) JNIHandles::make_local(THREAD, result); 2437 return ret; 2438 JNI_END 2439 2440 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2441 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2442 2443 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2444 JNIWrapper("GetObjectArrayElement"); 2445 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2446 jobject ret = NULL; 2447 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2448 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2449 if (a->is_within_bounds(index)) { 2450 ret = JNIHandles::make_local(THREAD, a->obj_at(index)); 2451 return ret; 2452 } else { 2453 ResourceMark rm(THREAD); 2454 stringStream ss; 2455 ss.print("Index %d out of bounds for length %d", index, a->length()); 2456 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2457 } 2458 JNI_END 2459 2460 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2461 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2462 2463 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2464 JNIWrapper("SetObjectArrayElement"); 2465 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2466 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2467 2468 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2469 oop v = JNIHandles::resolve(value); 2470 if (a->is_within_bounds(index)) { 2471 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2472 a->obj_at_put(index, v); 2473 } else { 2474 ResourceMark rm(THREAD); 2475 stringStream ss; 2476 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2477 ss.print("type mismatch: can not store %s to %s[%d]", 2478 v->klass()->external_name(), 2479 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2480 index); 2481 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2482 ss.print("[]"); 2483 } 2484 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2485 } 2486 } else { 2487 ResourceMark rm(THREAD); 2488 stringStream ss; 2489 ss.print("Index %d out of bounds for length %d", index, a->length()); 2490 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2491 } 2492 JNI_END 2493 2494 2495 2496 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2497 ,EntryProbe,ReturnProbe) \ 2498 \ 2499 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2500 , ReturnProbe); \ 2501 \ 2502 JNI_ENTRY(Return, \ 2503 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2504 JNIWrapper("New" XSTR(Result) "Array"); \ 2505 EntryProbe; \ 2506 Return ret = NULL;\ 2507 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2508 \ 2509 oop obj= oopFactory::Allocator(len, CHECK_NULL); \ 2510 ret = (Return) JNIHandles::make_local(THREAD, obj); \ 2511 return ret;\ 2512 JNI_END 2513 2514 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2515 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2516 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2517 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2518 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2519 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2520 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2521 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2522 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2523 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2524 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2525 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2526 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2527 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2528 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2529 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2530 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2531 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2532 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2533 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2534 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2535 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2536 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2537 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2538 2539 // Return an address which will fault if the caller writes to it. 2540 2541 static char* get_bad_address() { 2542 static char* bad_address = NULL; 2543 if (bad_address == NULL) { 2544 size_t size = os::vm_allocation_granularity(); 2545 bad_address = os::reserve_memory(size); 2546 if (bad_address != NULL) { 2547 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2548 /*is_committed*/false); 2549 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2550 } 2551 } 2552 return bad_address; 2553 } 2554 2555 2556 2557 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2558 , EntryProbe, ReturnProbe) \ 2559 \ 2560 JNI_ENTRY_NO_PRESERVE(ElementType*, \ 2561 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2562 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2563 EntryProbe; \ 2564 /* allocate an chunk of memory in c land */ \ 2565 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2566 ElementType* result; \ 2567 int len = a->length(); \ 2568 if (len == 0) { \ 2569 if (isCopy != NULL) { \ 2570 *isCopy = JNI_FALSE; \ 2571 } \ 2572 /* Empty array: legal but useless, can't return NULL. \ 2573 * Return a pointer to something useless. \ 2574 * Avoid asserts in typeArrayOop. */ \ 2575 result = (ElementType*)get_bad_address(); \ 2576 } else { \ 2577 /* JNI Specification states return NULL on OOM */ \ 2578 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2579 if (result != NULL) { \ 2580 /* copy the array to the c chunk */ \ 2581 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2582 result, len); \ 2583 if (isCopy) { \ 2584 *isCopy = JNI_TRUE; \ 2585 } \ 2586 } \ 2587 } \ 2588 ReturnProbe; \ 2589 return result; \ 2590 JNI_END 2591 2592 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2593 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2594 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2595 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2596 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2597 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2598 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2599 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2600 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2601 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2602 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2603 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2604 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2605 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2606 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2607 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2608 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2609 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2610 // Float and double probes don't return value because dtrace doesn't currently support it 2611 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2612 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2613 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2614 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2615 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2616 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2617 2618 2619 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2620 , EntryProbe, ReturnProbe);\ 2621 \ 2622 JNI_ENTRY_NO_PRESERVE(void, \ 2623 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2624 ElementType *buf, jint mode)) \ 2625 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2626 EntryProbe; \ 2627 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2628 int len = a->length(); \ 2629 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2630 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2631 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2632 } \ 2633 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2634 FreeHeap(buf); \ 2635 } \ 2636 } \ 2637 ReturnProbe; \ 2638 JNI_END 2639 2640 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2641 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2642 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2643 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2644 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2645 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2646 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2647 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2648 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2649 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2650 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2651 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2652 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2653 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2654 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2655 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2656 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2657 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2658 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2659 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2660 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2661 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2662 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2663 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2664 2665 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2666 ResourceMark rm(THREAD); 2667 if (copy_len < 0) { 2668 stringStream ss; 2669 ss.print("Length %d is negative", copy_len); 2670 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2671 } else if (start < 0 || (start > array_len - copy_len)) { 2672 stringStream ss; 2673 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2674 start, (int64_t)start+(int64_t)copy_len, array_len); 2675 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2676 } 2677 } 2678 2679 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2680 , EntryProbe, ReturnProbe); \ 2681 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2682 , ReturnProbe); \ 2683 \ 2684 JNI_ENTRY(void, \ 2685 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2686 jsize len, ElementType *buf)) \ 2687 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2688 EntryProbe; \ 2689 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2690 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2691 check_bounds(start, len, src->length(), CHECK); \ 2692 if (len > 0) { \ 2693 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2694 } \ 2695 JNI_END 2696 2697 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2698 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2699 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2700 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2701 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2702 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2703 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2704 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2705 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2706 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2707 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2708 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2709 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2710 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2711 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2712 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2713 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2714 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2715 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2716 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2717 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2718 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2719 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2720 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2721 2722 2723 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2724 , EntryProbe, ReturnProbe); \ 2725 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2726 ,ReturnProbe); \ 2727 \ 2728 JNI_ENTRY(void, \ 2729 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2730 jsize len, const ElementType *buf)) \ 2731 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2732 EntryProbe; \ 2733 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2734 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2735 check_bounds(start, len, dst->length(), CHECK); \ 2736 if (len > 0) { \ 2737 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2738 } \ 2739 JNI_END 2740 2741 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2742 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2743 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2744 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2745 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2746 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2747 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2748 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2749 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2750 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2751 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2752 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2753 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2754 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2755 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2756 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2757 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2758 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2759 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2760 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2761 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2762 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2763 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2764 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2765 2766 2767 DT_RETURN_MARK_DECL(RegisterNatives, jint 2768 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2769 2770 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2771 const JNINativeMethod *methods, 2772 jint nMethods)) 2773 JNIWrapper("RegisterNatives"); 2774 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2775 jint ret = 0; 2776 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2777 2778 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2779 2780 // There are no restrictions on native code registering native methods, 2781 // which allows agents to redefine the bindings to native methods, however 2782 // we issue a warning if any code running outside of the boot/platform 2783 // loader is rebinding any native methods in classes loaded by the 2784 // boot/platform loader that are in named modules. That will catch changes 2785 // to platform classes while excluding classes added to the bootclasspath. 2786 bool do_warning = false; 2787 2788 // Only instanceKlasses can have native methods 2789 if (k->is_instance_klass()) { 2790 oop cl = k->class_loader(); 2791 InstanceKlass* ik = InstanceKlass::cast(k); 2792 // Check for a platform class 2793 if ((cl == NULL || SystemDictionary::is_platform_class_loader(cl)) && 2794 ik->module()->is_named()) { 2795 Klass* caller = thread->security_get_caller_class(1); 2796 // If no caller class, or caller class has a different loader, then 2797 // issue a warning below. 2798 do_warning = (caller == NULL) || caller->class_loader() != cl; 2799 } 2800 } 2801 2802 2803 for (int index = 0; index < nMethods; index++) { 2804 const char* meth_name = methods[index].name; 2805 const char* meth_sig = methods[index].signature; 2806 int meth_name_len = (int)strlen(meth_name); 2807 2808 // The class should have been loaded (we have an instance of the class 2809 // passed in) so the method and signature should already be in the symbol 2810 // table. If they're not there, the method doesn't exist. 2811 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 2812 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 2813 2814 if (name == NULL || signature == NULL) { 2815 ResourceMark rm(THREAD); 2816 stringStream st; 2817 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 2818 // Must return negative value on failure 2819 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2820 } 2821 2822 if (do_warning) { 2823 ResourceMark rm(THREAD); 2824 log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s " 2825 "from code in a different classloader", k->external_name(), meth_name, meth_sig); 2826 } 2827 2828 bool res = Method::register_native(k, name, signature, 2829 (address) methods[index].fnPtr, THREAD); 2830 if (!res) { 2831 ret = -1; 2832 break; 2833 } 2834 } 2835 return ret; 2836 JNI_END 2837 2838 2839 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2840 JNIWrapper("UnregisterNatives"); 2841 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 2842 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2843 //%note jni_2 2844 if (k->is_instance_klass()) { 2845 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 2846 Method* m = InstanceKlass::cast(k)->methods()->at(index); 2847 if (m->is_native()) { 2848 m->clear_native_function(); 2849 m->set_signature_handler(NULL); 2850 } 2851 } 2852 } 2853 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 2854 return 0; 2855 JNI_END 2856 2857 // 2858 // Monitor functions 2859 // 2860 2861 DT_RETURN_MARK_DECL(MonitorEnter, jint 2862 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 2863 2864 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2865 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 2866 jint ret = JNI_ERR; 2867 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2868 2869 // If the object is null, we can't do anything with it 2870 if (jobj == NULL) { 2871 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2872 } 2873 2874 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2875 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 2876 ret = JNI_OK; 2877 return ret; 2878 JNI_END 2879 2880 DT_RETURN_MARK_DECL(MonitorExit, jint 2881 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 2882 2883 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2884 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 2885 jint ret = JNI_ERR; 2886 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2887 2888 // Don't do anything with a null object 2889 if (jobj == NULL) { 2890 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2891 } 2892 2893 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2894 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2895 2896 ret = JNI_OK; 2897 return ret; 2898 JNI_END 2899 2900 // 2901 // Extensions 2902 // 2903 2904 DT_VOID_RETURN_MARK_DECL(GetStringRegion 2905 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 2906 2907 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2908 JNIWrapper("GetStringRegion"); 2909 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 2910 DT_VOID_RETURN_MARK(GetStringRegion); 2911 oop s = JNIHandles::resolve_non_null(string); 2912 typeArrayOop s_value = java_lang_String::value(s); 2913 int s_len = java_lang_String::length(s, s_value); 2914 if (start < 0 || len < 0 || start > s_len - len) { 2915 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2916 } else { 2917 if (len > 0) { 2918 bool is_latin1 = java_lang_String::is_latin1(s); 2919 if (!is_latin1) { 2920 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 2921 buf, len); 2922 } else { 2923 for (int i = 0; i < len; i++) { 2924 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 2925 } 2926 } 2927 } 2928 } 2929 JNI_END 2930 2931 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 2932 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 2933 2934 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2935 JNIWrapper("GetStringUTFRegion"); 2936 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 2937 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2938 oop s = JNIHandles::resolve_non_null(string); 2939 typeArrayOop s_value = java_lang_String::value(s); 2940 int s_len = java_lang_String::length(s, s_value); 2941 if (start < 0 || len < 0 || start > s_len - len) { 2942 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2943 } else { 2944 //%note jni_7 2945 if (len > 0) { 2946 // Assume the buffer is large enough as the JNI spec. does not require user error checking 2947 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 2948 // as_utf8_string null-terminates the result string 2949 } else { 2950 // JDK null-terminates the buffer even in len is zero 2951 if (buf != NULL) { 2952 buf[0] = 0; 2953 } 2954 } 2955 } 2956 JNI_END 2957 2958 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 2959 if (Universe::heap()->supports_object_pinning()) { 2960 const oop o = JNIHandles::resolve_non_null(obj); 2961 return Universe::heap()->pin_object(thread, o); 2962 } else { 2963 GCLocker::lock_critical(thread); 2964 return JNIHandles::resolve_non_null(obj); 2965 } 2966 } 2967 2968 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 2969 if (Universe::heap()->supports_object_pinning()) { 2970 const oop o = JNIHandles::resolve_non_null(obj); 2971 return Universe::heap()->unpin_object(thread, o); 2972 } else { 2973 GCLocker::unlock_critical(thread); 2974 } 2975 } 2976 2977 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2978 JNIWrapper("GetPrimitiveArrayCritical"); 2979 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 2980 if (isCopy != NULL) { 2981 *isCopy = JNI_FALSE; 2982 } 2983 oop a = lock_gc_or_pin_object(thread, array); 2984 assert(a->is_array(), "just checking"); 2985 BasicType type; 2986 if (a->is_objArray()) { 2987 type = T_OBJECT; 2988 } else { 2989 type = TypeArrayKlass::cast(a->klass())->element_type(); 2990 } 2991 void* ret = arrayOop(a)->base(type); 2992 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 2993 return ret; 2994 JNI_END 2995 2996 2997 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2998 JNIWrapper("ReleasePrimitiveArrayCritical"); 2999 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3000 unlock_gc_or_unpin_object(thread, array); 3001 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3002 JNI_END 3003 3004 3005 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3006 JNIWrapper("GetStringCritical"); 3007 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3008 oop s = lock_gc_or_pin_object(thread, string); 3009 typeArrayOop s_value = java_lang_String::value(s); 3010 bool is_latin1 = java_lang_String::is_latin1(s); 3011 if (isCopy != NULL) { 3012 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3013 } 3014 jchar* ret; 3015 if (!is_latin1) { 3016 ret = (jchar*) s_value->base(T_CHAR); 3017 } else { 3018 // Inflate latin1 encoded string to UTF16 3019 int s_len = java_lang_String::length(s, s_value); 3020 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3021 /* JNI Specification states return NULL on OOM */ 3022 if (ret != NULL) { 3023 for (int i = 0; i < s_len; i++) { 3024 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3025 } 3026 ret[s_len] = 0; 3027 } 3028 } 3029 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3030 return ret; 3031 JNI_END 3032 3033 3034 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3035 JNIWrapper("ReleaseStringCritical"); 3036 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3037 // The str and chars arguments are ignored for UTF16 strings 3038 oop s = JNIHandles::resolve_non_null(str); 3039 bool is_latin1 = java_lang_String::is_latin1(s); 3040 if (is_latin1) { 3041 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3042 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3043 FREE_C_HEAP_ARRAY(jchar, chars); 3044 } 3045 unlock_gc_or_unpin_object(thread, str); 3046 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3047 JNI_END 3048 3049 3050 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3051 JNIWrapper("jni_NewWeakGlobalRef"); 3052 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3053 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3054 jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL); 3055 if (ret == NULL) { 3056 THROW_OOP_(Universe::out_of_memory_error_c_heap(), NULL); 3057 } 3058 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3059 return ret; 3060 JNI_END 3061 3062 // Must be JNI_ENTRY (with HandleMark) 3063 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3064 JNIWrapper("jni_DeleteWeakGlobalRef"); 3065 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3066 JNIHandles::destroy_weak_global(ref); 3067 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3068 JNI_END 3069 3070 3071 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3072 JNIWrapper("jni_ExceptionCheck"); 3073 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3074 jni_check_async_exceptions(thread); 3075 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3076 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3077 return ret; 3078 JNI_END 3079 3080 3081 // Initialization state for three routines below relating to 3082 // java.nio.DirectBuffers 3083 static int directBufferSupportInitializeStarted = 0; 3084 static volatile int directBufferSupportInitializeEnded = 0; 3085 static volatile int directBufferSupportInitializeFailed = 0; 3086 static jclass bufferClass = NULL; 3087 static jclass directBufferClass = NULL; 3088 static jclass directByteBufferClass = NULL; 3089 static jmethodID directByteBufferConstructor = NULL; 3090 static jfieldID directBufferAddressField = NULL; 3091 static jfieldID bufferCapacityField = NULL; 3092 3093 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3094 Handle loader; // null (bootstrap) loader 3095 Handle protection_domain; // null protection domain 3096 3097 TempNewSymbol sym = SymbolTable::new_symbol(name); 3098 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3099 3100 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3101 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3102 } 3103 return result; 3104 } 3105 3106 // These lookups are done with the NULL (bootstrap) ClassLoader to 3107 // circumvent any security checks that would be done by jni_FindClass. 3108 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3109 { 3110 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3111 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3112 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3113 return true; 3114 } 3115 JNI_END 3116 3117 3118 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3119 if (directBufferSupportInitializeFailed) { 3120 return false; 3121 } 3122 3123 if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) { 3124 if (!lookupDirectBufferClasses(env)) { 3125 directBufferSupportInitializeFailed = 1; 3126 return false; 3127 } 3128 3129 // Make global references for these 3130 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3131 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3132 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3133 3134 // Global refs will be NULL if out-of-memory (no exception is pending) 3135 if (bufferClass == NULL || directBufferClass == NULL || directByteBufferClass == NULL) { 3136 directBufferSupportInitializeFailed = 1; 3137 return false; 3138 } 3139 3140 // Get needed field and method IDs 3141 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3142 if (env->ExceptionCheck()) { 3143 env->ExceptionClear(); 3144 directBufferSupportInitializeFailed = 1; 3145 return false; 3146 } 3147 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3148 if (env->ExceptionCheck()) { 3149 env->ExceptionClear(); 3150 directBufferSupportInitializeFailed = 1; 3151 return false; 3152 } 3153 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3154 if (env->ExceptionCheck()) { 3155 env->ExceptionClear(); 3156 directBufferSupportInitializeFailed = 1; 3157 return false; 3158 } 3159 3160 if ((directByteBufferConstructor == NULL) || 3161 (directBufferAddressField == NULL) || 3162 (bufferCapacityField == NULL)) { 3163 directBufferSupportInitializeFailed = 1; 3164 return false; 3165 } 3166 3167 directBufferSupportInitializeEnded = 1; 3168 } else { 3169 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3170 os::naked_yield(); 3171 } 3172 } 3173 3174 return !directBufferSupportInitializeFailed; 3175 } 3176 3177 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3178 { 3179 // thread_from_jni_environment() will block if VM is gone. 3180 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3181 3182 JNIWrapper("jni_NewDirectByteBuffer"); 3183 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3184 3185 if (!directBufferSupportInitializeEnded) { 3186 if (!initializeDirectBufferSupport(env, thread)) { 3187 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3188 return NULL; 3189 } 3190 } 3191 3192 // Being paranoid about accidental sign extension on address 3193 jlong addr = (jlong) ((uintptr_t) address); 3194 // NOTE that package-private DirectByteBuffer constructor currently 3195 // takes int capacity 3196 jint cap = (jint) capacity; 3197 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3198 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3199 return ret; 3200 } 3201 3202 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3203 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3204 3205 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3206 { 3207 // thread_from_jni_environment() will block if VM is gone. 3208 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3209 3210 JNIWrapper("jni_GetDirectBufferAddress"); 3211 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3212 void* ret = NULL; 3213 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3214 3215 if (!directBufferSupportInitializeEnded) { 3216 if (!initializeDirectBufferSupport(env, thread)) { 3217 return 0; 3218 } 3219 } 3220 3221 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3222 return 0; 3223 } 3224 3225 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3226 return ret; 3227 } 3228 3229 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3230 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3231 3232 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3233 { 3234 // thread_from_jni_environment() will block if VM is gone. 3235 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3236 3237 JNIWrapper("jni_GetDirectBufferCapacity"); 3238 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3239 jlong ret = -1; 3240 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3241 3242 if (!directBufferSupportInitializeEnded) { 3243 if (!initializeDirectBufferSupport(env, thread)) { 3244 ret = 0; 3245 return ret; 3246 } 3247 } 3248 3249 if (buf == NULL) { 3250 return -1; 3251 } 3252 3253 if (!env->IsInstanceOf(buf, directBufferClass)) { 3254 return -1; 3255 } 3256 3257 // NOTE that capacity is currently an int in the implementation 3258 ret = env->GetIntField(buf, bufferCapacityField); 3259 return ret; 3260 } 3261 3262 3263 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3264 JNIWrapper("GetVersion"); 3265 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3266 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3267 return CurrentVersion; 3268 JNI_END 3269 3270 extern struct JavaVM_ main_vm; 3271 3272 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3273 JNIWrapper("jni_GetJavaVM"); 3274 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3275 *vm = (JavaVM *)(&main_vm); 3276 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3277 return JNI_OK; 3278 JNI_END 3279 3280 3281 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3282 JNIWrapper("GetModule"); 3283 return Modules::get_module(clazz, THREAD); 3284 JNI_END 3285 3286 3287 // Structure containing all jni functions 3288 struct JNINativeInterface_ jni_NativeInterface = { 3289 NULL, 3290 NULL, 3291 NULL, 3292 3293 NULL, 3294 3295 jni_GetVersion, 3296 3297 jni_DefineClass, 3298 jni_FindClass, 3299 3300 jni_FromReflectedMethod, 3301 jni_FromReflectedField, 3302 3303 jni_ToReflectedMethod, 3304 3305 jni_GetSuperclass, 3306 jni_IsAssignableFrom, 3307 3308 jni_ToReflectedField, 3309 3310 jni_Throw, 3311 jni_ThrowNew, 3312 jni_ExceptionOccurred, 3313 jni_ExceptionDescribe, 3314 jni_ExceptionClear, 3315 jni_FatalError, 3316 3317 jni_PushLocalFrame, 3318 jni_PopLocalFrame, 3319 3320 jni_NewGlobalRef, 3321 jni_DeleteGlobalRef, 3322 jni_DeleteLocalRef, 3323 jni_IsSameObject, 3324 3325 jni_NewLocalRef, 3326 jni_EnsureLocalCapacity, 3327 3328 jni_AllocObject, 3329 jni_NewObject, 3330 jni_NewObjectV, 3331 jni_NewObjectA, 3332 3333 jni_GetObjectClass, 3334 jni_IsInstanceOf, 3335 3336 jni_GetMethodID, 3337 3338 jni_CallObjectMethod, 3339 jni_CallObjectMethodV, 3340 jni_CallObjectMethodA, 3341 jni_CallBooleanMethod, 3342 jni_CallBooleanMethodV, 3343 jni_CallBooleanMethodA, 3344 jni_CallByteMethod, 3345 jni_CallByteMethodV, 3346 jni_CallByteMethodA, 3347 jni_CallCharMethod, 3348 jni_CallCharMethodV, 3349 jni_CallCharMethodA, 3350 jni_CallShortMethod, 3351 jni_CallShortMethodV, 3352 jni_CallShortMethodA, 3353 jni_CallIntMethod, 3354 jni_CallIntMethodV, 3355 jni_CallIntMethodA, 3356 jni_CallLongMethod, 3357 jni_CallLongMethodV, 3358 jni_CallLongMethodA, 3359 jni_CallFloatMethod, 3360 jni_CallFloatMethodV, 3361 jni_CallFloatMethodA, 3362 jni_CallDoubleMethod, 3363 jni_CallDoubleMethodV, 3364 jni_CallDoubleMethodA, 3365 jni_CallVoidMethod, 3366 jni_CallVoidMethodV, 3367 jni_CallVoidMethodA, 3368 3369 jni_CallNonvirtualObjectMethod, 3370 jni_CallNonvirtualObjectMethodV, 3371 jni_CallNonvirtualObjectMethodA, 3372 jni_CallNonvirtualBooleanMethod, 3373 jni_CallNonvirtualBooleanMethodV, 3374 jni_CallNonvirtualBooleanMethodA, 3375 jni_CallNonvirtualByteMethod, 3376 jni_CallNonvirtualByteMethodV, 3377 jni_CallNonvirtualByteMethodA, 3378 jni_CallNonvirtualCharMethod, 3379 jni_CallNonvirtualCharMethodV, 3380 jni_CallNonvirtualCharMethodA, 3381 jni_CallNonvirtualShortMethod, 3382 jni_CallNonvirtualShortMethodV, 3383 jni_CallNonvirtualShortMethodA, 3384 jni_CallNonvirtualIntMethod, 3385 jni_CallNonvirtualIntMethodV, 3386 jni_CallNonvirtualIntMethodA, 3387 jni_CallNonvirtualLongMethod, 3388 jni_CallNonvirtualLongMethodV, 3389 jni_CallNonvirtualLongMethodA, 3390 jni_CallNonvirtualFloatMethod, 3391 jni_CallNonvirtualFloatMethodV, 3392 jni_CallNonvirtualFloatMethodA, 3393 jni_CallNonvirtualDoubleMethod, 3394 jni_CallNonvirtualDoubleMethodV, 3395 jni_CallNonvirtualDoubleMethodA, 3396 jni_CallNonvirtualVoidMethod, 3397 jni_CallNonvirtualVoidMethodV, 3398 jni_CallNonvirtualVoidMethodA, 3399 3400 jni_GetFieldID, 3401 3402 jni_GetObjectField, 3403 jni_GetBooleanField, 3404 jni_GetByteField, 3405 jni_GetCharField, 3406 jni_GetShortField, 3407 jni_GetIntField, 3408 jni_GetLongField, 3409 jni_GetFloatField, 3410 jni_GetDoubleField, 3411 3412 jni_SetObjectField, 3413 jni_SetBooleanField, 3414 jni_SetByteField, 3415 jni_SetCharField, 3416 jni_SetShortField, 3417 jni_SetIntField, 3418 jni_SetLongField, 3419 jni_SetFloatField, 3420 jni_SetDoubleField, 3421 3422 jni_GetStaticMethodID, 3423 3424 jni_CallStaticObjectMethod, 3425 jni_CallStaticObjectMethodV, 3426 jni_CallStaticObjectMethodA, 3427 jni_CallStaticBooleanMethod, 3428 jni_CallStaticBooleanMethodV, 3429 jni_CallStaticBooleanMethodA, 3430 jni_CallStaticByteMethod, 3431 jni_CallStaticByteMethodV, 3432 jni_CallStaticByteMethodA, 3433 jni_CallStaticCharMethod, 3434 jni_CallStaticCharMethodV, 3435 jni_CallStaticCharMethodA, 3436 jni_CallStaticShortMethod, 3437 jni_CallStaticShortMethodV, 3438 jni_CallStaticShortMethodA, 3439 jni_CallStaticIntMethod, 3440 jni_CallStaticIntMethodV, 3441 jni_CallStaticIntMethodA, 3442 jni_CallStaticLongMethod, 3443 jni_CallStaticLongMethodV, 3444 jni_CallStaticLongMethodA, 3445 jni_CallStaticFloatMethod, 3446 jni_CallStaticFloatMethodV, 3447 jni_CallStaticFloatMethodA, 3448 jni_CallStaticDoubleMethod, 3449 jni_CallStaticDoubleMethodV, 3450 jni_CallStaticDoubleMethodA, 3451 jni_CallStaticVoidMethod, 3452 jni_CallStaticVoidMethodV, 3453 jni_CallStaticVoidMethodA, 3454 3455 jni_GetStaticFieldID, 3456 3457 jni_GetStaticObjectField, 3458 jni_GetStaticBooleanField, 3459 jni_GetStaticByteField, 3460 jni_GetStaticCharField, 3461 jni_GetStaticShortField, 3462 jni_GetStaticIntField, 3463 jni_GetStaticLongField, 3464 jni_GetStaticFloatField, 3465 jni_GetStaticDoubleField, 3466 3467 jni_SetStaticObjectField, 3468 jni_SetStaticBooleanField, 3469 jni_SetStaticByteField, 3470 jni_SetStaticCharField, 3471 jni_SetStaticShortField, 3472 jni_SetStaticIntField, 3473 jni_SetStaticLongField, 3474 jni_SetStaticFloatField, 3475 jni_SetStaticDoubleField, 3476 3477 jni_NewString, 3478 jni_GetStringLength, 3479 jni_GetStringChars, 3480 jni_ReleaseStringChars, 3481 3482 jni_NewStringUTF, 3483 jni_GetStringUTFLength, 3484 jni_GetStringUTFChars, 3485 jni_ReleaseStringUTFChars, 3486 3487 jni_GetArrayLength, 3488 3489 jni_NewObjectArray, 3490 jni_GetObjectArrayElement, 3491 jni_SetObjectArrayElement, 3492 3493 jni_NewBooleanArray, 3494 jni_NewByteArray, 3495 jni_NewCharArray, 3496 jni_NewShortArray, 3497 jni_NewIntArray, 3498 jni_NewLongArray, 3499 jni_NewFloatArray, 3500 jni_NewDoubleArray, 3501 3502 jni_GetBooleanArrayElements, 3503 jni_GetByteArrayElements, 3504 jni_GetCharArrayElements, 3505 jni_GetShortArrayElements, 3506 jni_GetIntArrayElements, 3507 jni_GetLongArrayElements, 3508 jni_GetFloatArrayElements, 3509 jni_GetDoubleArrayElements, 3510 3511 jni_ReleaseBooleanArrayElements, 3512 jni_ReleaseByteArrayElements, 3513 jni_ReleaseCharArrayElements, 3514 jni_ReleaseShortArrayElements, 3515 jni_ReleaseIntArrayElements, 3516 jni_ReleaseLongArrayElements, 3517 jni_ReleaseFloatArrayElements, 3518 jni_ReleaseDoubleArrayElements, 3519 3520 jni_GetBooleanArrayRegion, 3521 jni_GetByteArrayRegion, 3522 jni_GetCharArrayRegion, 3523 jni_GetShortArrayRegion, 3524 jni_GetIntArrayRegion, 3525 jni_GetLongArrayRegion, 3526 jni_GetFloatArrayRegion, 3527 jni_GetDoubleArrayRegion, 3528 3529 jni_SetBooleanArrayRegion, 3530 jni_SetByteArrayRegion, 3531 jni_SetCharArrayRegion, 3532 jni_SetShortArrayRegion, 3533 jni_SetIntArrayRegion, 3534 jni_SetLongArrayRegion, 3535 jni_SetFloatArrayRegion, 3536 jni_SetDoubleArrayRegion, 3537 3538 jni_RegisterNatives, 3539 jni_UnregisterNatives, 3540 3541 jni_MonitorEnter, 3542 jni_MonitorExit, 3543 3544 jni_GetJavaVM, 3545 3546 jni_GetStringRegion, 3547 jni_GetStringUTFRegion, 3548 3549 jni_GetPrimitiveArrayCritical, 3550 jni_ReleasePrimitiveArrayCritical, 3551 3552 jni_GetStringCritical, 3553 jni_ReleaseStringCritical, 3554 3555 jni_NewWeakGlobalRef, 3556 jni_DeleteWeakGlobalRef, 3557 3558 jni_ExceptionCheck, 3559 3560 jni_NewDirectByteBuffer, 3561 jni_GetDirectBufferAddress, 3562 jni_GetDirectBufferCapacity, 3563 3564 // New 1_6 features 3565 3566 jni_GetObjectRefType, 3567 3568 // Module features 3569 3570 jni_GetModule 3571 }; 3572 3573 3574 // For jvmti use to modify jni function table. 3575 // Java threads in native contiues to run until it is transitioned 3576 // to VM at safepoint. Before the transition or before it is blocked 3577 // for safepoint it may access jni function table. VM could crash if 3578 // any java thread access the jni function table in the middle of memcpy. 3579 // To avoid this each function pointers are copied automically. 3580 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3581 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3582 intptr_t *a = (intptr_t *) jni_functions(); 3583 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3584 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3585 Atomic::store(a++, *b++); 3586 } 3587 } 3588 3589 void quicken_jni_functions() { 3590 // Replace Get<Primitive>Field with fast versions 3591 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) { 3592 address func; 3593 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3594 if (func != (address)-1) { 3595 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3596 } 3597 func = JNI_FastGetField::generate_fast_get_byte_field(); 3598 if (func != (address)-1) { 3599 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3600 } 3601 func = JNI_FastGetField::generate_fast_get_char_field(); 3602 if (func != (address)-1) { 3603 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3604 } 3605 func = JNI_FastGetField::generate_fast_get_short_field(); 3606 if (func != (address)-1) { 3607 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3608 } 3609 func = JNI_FastGetField::generate_fast_get_int_field(); 3610 if (func != (address)-1) { 3611 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3612 } 3613 func = JNI_FastGetField::generate_fast_get_long_field(); 3614 if (func != (address)-1) { 3615 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3616 } 3617 func = JNI_FastGetField::generate_fast_get_float_field(); 3618 if (func != (address)-1) { 3619 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3620 } 3621 func = JNI_FastGetField::generate_fast_get_double_field(); 3622 if (func != (address)-1) { 3623 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3624 } 3625 } 3626 } 3627 3628 // Returns the function structure 3629 struct JNINativeInterface_* jni_functions() { 3630 #if INCLUDE_JNI_CHECK 3631 if (CheckJNICalls) return jni_functions_check(); 3632 #endif // INCLUDE_JNI_CHECK 3633 return &jni_NativeInterface; 3634 } 3635 3636 // Returns the function structure 3637 struct JNINativeInterface_* jni_functions_nocheck() { 3638 return &jni_NativeInterface; 3639 } 3640 3641 static void post_thread_start_event(const JavaThread* jt) { 3642 assert(jt != NULL, "invariant"); 3643 EventThreadStart event; 3644 if (event.should_commit()) { 3645 event.set_thread(JFR_THREAD_ID(jt)); 3646 event.set_parentThread((traceid)0); 3647 #if INCLUDE_JFR 3648 if (EventThreadStart::is_stacktrace_enabled()) { 3649 jt->jfr_thread_local()->set_cached_stack_trace_id((traceid)0); 3650 event.commit(); 3651 jt->jfr_thread_local()->clear_cached_stack_trace(); 3652 } else 3653 #endif 3654 { 3655 event.commit(); 3656 } 3657 } 3658 } 3659 3660 // Invocation API 3661 3662 3663 // Forward declaration 3664 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3665 3666 // Global invocation API vars 3667 volatile int vm_created = 0; 3668 // Indicate whether it is safe to recreate VM. Recreation is only 3669 // possible after a failed initial creation attempt in some cases. 3670 volatile int safe_to_recreate_vm = 1; 3671 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3672 3673 3674 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3675 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3676 3677 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3678 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3679 3680 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3681 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3682 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3683 jint ret = JNI_ERR; 3684 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3685 3686 if (Threads::is_supported_jni_version(args->version)) { 3687 ret = JNI_OK; 3688 } 3689 // 1.1 style no longer supported in hotspot. 3690 // According the JNI spec, we should update args->version on return. 3691 // We also use the structure to communicate with launcher about default 3692 // stack size. 3693 if (args->version == JNI_VERSION_1_1) { 3694 args->version = JNI_VERSION_1_2; 3695 // javaStackSize is int in arguments structure 3696 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3697 args->javaStackSize = (jint)(ThreadStackSize * K); 3698 } 3699 return ret; 3700 } 3701 3702 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3703 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3704 3705 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3706 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3707 3708 jint result = JNI_ERR; 3709 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3710 3711 // We're about to use Atomic::xchg for synchronization. Some Zero 3712 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3713 // but __sync_lock_test_and_set is not guaranteed to do what we want 3714 // on all architectures. So we check it works before relying on it. 3715 #if defined(ZERO) && defined(ASSERT) 3716 { 3717 jint a = 0xcafebabe; 3718 jint b = Atomic::xchg(&a, (jint) 0xdeadbeef); 3719 void *c = &a; 3720 void *d = Atomic::xchg(&c, &b); 3721 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3722 assert(c == &b && d == &a, "Atomic::xchg() works"); 3723 } 3724 #endif // ZERO && ASSERT 3725 3726 // At the moment it's only possible to have one Java VM, 3727 // since some of the runtime state is in global variables. 3728 3729 // We cannot use our mutex locks here, since they only work on 3730 // Threads. We do an atomic compare and exchange to ensure only 3731 // one thread can call this method at a time 3732 3733 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3734 // the add/dec implementations are dependent on whether we are running 3735 // on a multiprocessor Atomic::xchg does not have this problem. 3736 if (Atomic::xchg(&vm_created, 1) == 1) { 3737 return JNI_EEXIST; // already created, or create attempt in progress 3738 } 3739 3740 // If a previous creation attempt failed but can be retried safely, 3741 // then safe_to_recreate_vm will have been reset to 1 after being 3742 // cleared here. If a previous creation attempt succeeded and we then 3743 // destroyed that VM, we will be prevented from trying to recreate 3744 // the VM in the same process, as the value will still be 0. 3745 if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) { 3746 return JNI_ERR; 3747 } 3748 3749 assert(vm_created == 1, "vm_created is true during the creation"); 3750 3751 /** 3752 * Certain errors during initialization are recoverable and do not 3753 * prevent this method from being called again at a later time 3754 * (perhaps with different arguments). However, at a certain 3755 * point during initialization if an error occurs we cannot allow 3756 * this function to be called again (or it will crash). In those 3757 * situations, the 'canTryAgain' flag is set to false, which atomically 3758 * sets safe_to_recreate_vm to 1, such that any new call to 3759 * JNI_CreateJavaVM will immediately fail using the above logic. 3760 */ 3761 bool can_try_again = true; 3762 3763 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3764 if (result == JNI_OK) { 3765 JavaThread *thread = JavaThread::current(); 3766 assert(!thread->has_pending_exception(), "should have returned not OK"); 3767 /* thread is thread_in_vm here */ 3768 *vm = (JavaVM *)(&main_vm); 3769 *(JNIEnv**)penv = thread->jni_environment(); 3770 3771 #if INCLUDE_JVMCI 3772 if (EnableJVMCI) { 3773 if (UseJVMCICompiler) { 3774 // JVMCI is initialized on a CompilerThread 3775 if (BootstrapJVMCI) { 3776 JavaThread* THREAD = thread; 3777 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3778 compiler->bootstrap(THREAD); 3779 if (HAS_PENDING_EXCEPTION) { 3780 HandleMark hm; 3781 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3782 } 3783 } 3784 } 3785 } 3786 #endif 3787 3788 // Notify JVMTI 3789 if (JvmtiExport::should_post_thread_life()) { 3790 JvmtiExport::post_thread_start(thread); 3791 } 3792 3793 post_thread_start_event(thread); 3794 3795 #ifndef PRODUCT 3796 if (ReplayCompiles) ciReplay::replay(thread); 3797 3798 // Some platforms (like Win*) need a wrapper around these test 3799 // functions in order to properly handle error conditions. 3800 VMError::test_error_handler(); 3801 #endif 3802 3803 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3804 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3805 } else { 3806 // If create_vm exits because of a pending exception, exit with that 3807 // exception. In the future when we figure out how to reclaim memory, 3808 // we may be able to exit with JNI_ERR and allow the calling application 3809 // to continue. 3810 if (Universe::is_fully_initialized()) { 3811 // otherwise no pending exception possible - VM will already have aborted 3812 JavaThread* THREAD = JavaThread::current(); 3813 if (HAS_PENDING_EXCEPTION) { 3814 HandleMark hm; 3815 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3816 } 3817 } 3818 3819 if (can_try_again) { 3820 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3821 safe_to_recreate_vm = 1; 3822 } 3823 3824 // Creation failed. We must reset vm_created 3825 *vm = 0; 3826 *(JNIEnv**)penv = 0; 3827 // reset vm_created last to avoid race condition. Use OrderAccess to 3828 // control both compiler and architectural-based reordering. 3829 Atomic::release_store(&vm_created, 0); 3830 } 3831 3832 // Flush stdout and stderr before exit. 3833 fflush(stdout); 3834 fflush(stderr); 3835 3836 return result; 3837 3838 } 3839 3840 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3841 jint result = JNI_ERR; 3842 // On Windows, let CreateJavaVM run with SEH protection 3843 #ifdef _WIN32 3844 __try { 3845 #endif 3846 result = JNI_CreateJavaVM_inner(vm, penv, args); 3847 #ifdef _WIN32 3848 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3849 // Nothing to do. 3850 } 3851 #endif 3852 return result; 3853 } 3854 3855 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3856 // See bug 4367188, the wrapper can sometimes cause VM crashes 3857 // JNIWrapper("GetCreatedJavaVMs"); 3858 3859 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 3860 3861 if (vm_created == 1) { 3862 if (numVMs != NULL) *numVMs = 1; 3863 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3864 } else { 3865 if (numVMs != NULL) *numVMs = 0; 3866 } 3867 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 3868 return JNI_OK; 3869 } 3870 3871 extern "C" { 3872 3873 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 3874 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 3875 3876 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 3877 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 3878 jint res = JNI_ERR; 3879 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3880 3881 if (vm_created == 0) { 3882 res = JNI_ERR; 3883 return res; 3884 } 3885 3886 JNIWrapper("DestroyJavaVM"); 3887 JNIEnv *env; 3888 JavaVMAttachArgs destroyargs; 3889 destroyargs.version = CurrentVersion; 3890 destroyargs.name = (char *)"DestroyJavaVM"; 3891 destroyargs.group = NULL; 3892 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3893 if (res != JNI_OK) { 3894 return res; 3895 } 3896 3897 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3898 JavaThread* thread = JavaThread::current(); 3899 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3900 if (Threads::destroy_vm()) { 3901 // Should not change thread state, VM is gone 3902 vm_created = 0; 3903 res = JNI_OK; 3904 return res; 3905 } else { 3906 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3907 res = JNI_ERR; 3908 return res; 3909 } 3910 } 3911 3912 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3913 jint result = JNI_ERR; 3914 // On Windows, we need SEH protection 3915 #ifdef _WIN32 3916 __try { 3917 #endif 3918 result = jni_DestroyJavaVM_inner(vm); 3919 #ifdef _WIN32 3920 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 3921 // Nothing to do. 3922 } 3923 #endif 3924 return result; 3925 } 3926 3927 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3928 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3929 3930 // Check below commented out from JDK1.2fcs as well 3931 /* 3932 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3933 return JNI_EVERSION; 3934 } 3935 */ 3936 3937 Thread* t = Thread::current_or_null(); 3938 if (t != NULL) { 3939 // If executing from an atexit hook we may be in the VMThread. 3940 if (t->is_Java_thread()) { 3941 // If the thread has been attached this operation is a no-op 3942 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 3943 return JNI_OK; 3944 } else { 3945 return JNI_ERR; 3946 } 3947 } 3948 3949 // Create a thread and mark it as attaching so it will be skipped by the 3950 // ThreadsListEnumerator - see CR 6404306 3951 JavaThread* thread = new JavaThread(true); 3952 3953 // Set correct safepoint info. The thread is going to call into Java when 3954 // initializing the Java level thread object. Hence, the correct state must 3955 // be set in order for the Safepoint code to deal with it correctly. 3956 thread->set_thread_state(_thread_in_vm); 3957 thread->record_stack_base_and_size(); 3958 thread->register_thread_stack_with_NMT(); 3959 thread->initialize_thread_current(); 3960 3961 if (!os::create_attached_thread(thread)) { 3962 thread->smr_delete(); 3963 return JNI_ERR; 3964 } 3965 // Enable stack overflow checks 3966 thread->create_stack_guard_pages(); 3967 3968 thread->initialize_tlab(); 3969 3970 thread->cache_global_variables(); 3971 3972 // This thread will not do a safepoint check, since it has 3973 // not been added to the Thread list yet. 3974 { MutexLocker ml(Threads_lock); 3975 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3976 // avoid this thread trying to do a GC before it is added to the thread-list 3977 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3978 Threads::add(thread, daemon); 3979 } 3980 // Create thread group and name info from attach arguments 3981 oop group = NULL; 3982 char* thread_name = NULL; 3983 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 3984 group = JNIHandles::resolve(args->group); 3985 thread_name = args->name; // may be NULL 3986 } 3987 if (group == NULL) group = Universe::main_thread_group(); 3988 3989 // Create Java level thread object and attach it to this thread 3990 bool attach_failed = false; 3991 { 3992 EXCEPTION_MARK; 3993 HandleMark hm(THREAD); 3994 Handle thread_group(THREAD, group); 3995 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3996 if (HAS_PENDING_EXCEPTION) { 3997 CLEAR_PENDING_EXCEPTION; 3998 // cleanup outside the handle mark. 3999 attach_failed = true; 4000 } 4001 } 4002 4003 if (attach_failed) { 4004 // Added missing cleanup 4005 thread->cleanup_failed_attach_current_thread(daemon); 4006 return JNI_ERR; 4007 } 4008 4009 // mark the thread as no longer attaching 4010 // this uses a fence to push the change through so we don't have 4011 // to regrab the threads_lock 4012 thread->set_done_attaching_via_jni(); 4013 4014 // Set java thread status. 4015 java_lang_Thread::set_thread_status(thread->threadObj(), 4016 java_lang_Thread::RUNNABLE); 4017 4018 // Notify the debugger 4019 if (JvmtiExport::should_post_thread_life()) { 4020 JvmtiExport::post_thread_start(thread); 4021 } 4022 4023 post_thread_start_event(thread); 4024 4025 *(JNIEnv**)penv = thread->jni_environment(); 4026 4027 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4028 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4029 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4030 // needed. 4031 4032 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4033 4034 // Perform any platform dependent FPU setup 4035 os::setup_fpu(); 4036 4037 return JNI_OK; 4038 } 4039 4040 4041 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4042 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4043 if (vm_created == 0) { 4044 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4045 return JNI_ERR; 4046 } 4047 4048 JNIWrapper("AttachCurrentThread"); 4049 jint ret = attach_current_thread(vm, penv, _args, false); 4050 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4051 return ret; 4052 } 4053 4054 4055 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4056 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4057 if (vm_created == 0) { 4058 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR); 4059 return JNI_ERR; 4060 } 4061 4062 JNIWrapper("DetachCurrentThread"); 4063 4064 Thread* current = Thread::current_or_null(); 4065 4066 // If the thread has already been detached the operation is a no-op 4067 if (current == NULL) { 4068 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4069 return JNI_OK; 4070 } 4071 4072 // If executing from an atexit hook we may be in the VMThread. 4073 if (!current->is_Java_thread()) { 4074 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4075 return JNI_ERR; 4076 } 4077 4078 VM_Exit::block_if_vm_exited(); 4079 4080 JavaThread* thread = (JavaThread*) current; 4081 if (thread->has_last_Java_frame()) { 4082 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4083 // Can't detach a thread that's running java, that can't work. 4084 return JNI_ERR; 4085 } 4086 4087 // Safepoint support. Have to do call-back to safepoint code, if in the 4088 // middle of a safepoint operation 4089 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4090 4091 // XXX: Note that JavaThread::exit() call below removes the guards on the 4092 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4093 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4094 // of the guards is visible in jni_AttachCurrentThread above, 4095 // the removal of the guards is buried below in JavaThread::exit() 4096 // here. The abstraction should be more symmetrically either exposed 4097 // or hidden (e.g. it could probably be hidden in the same 4098 // (platform-dependent) methods where we do alternate stack 4099 // maintenance work?) 4100 thread->exit(false, JavaThread::jni_detach); 4101 thread->smr_delete(); 4102 4103 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4104 return JNI_OK; 4105 } 4106 4107 DT_RETURN_MARK_DECL(GetEnv, jint 4108 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4109 4110 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4111 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4112 jint ret = JNI_ERR; 4113 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4114 4115 if (vm_created == 0) { 4116 *penv = NULL; 4117 ret = JNI_EDETACHED; 4118 return ret; 4119 } 4120 4121 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4122 return ret; 4123 } 4124 4125 #ifndef JVMPI_VERSION_1 4126 // need these in order to be polite about older agents 4127 #define JVMPI_VERSION_1 ((jint)0x10000001) 4128 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4129 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4130 #endif // !JVMPI_VERSION_1 4131 4132 Thread* thread = Thread::current_or_null(); 4133 if (thread != NULL && thread->is_Java_thread()) { 4134 if (Threads::is_supported_jni_version_including_1_1(version)) { 4135 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4136 ret = JNI_OK; 4137 return ret; 4138 4139 } else if (version == JVMPI_VERSION_1 || 4140 version == JVMPI_VERSION_1_1 || 4141 version == JVMPI_VERSION_1_2) { 4142 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4143 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4144 ret = JNI_EVERSION; 4145 return ret; 4146 } else if (JvmtiExport::is_jvmdi_version(version)) { 4147 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4148 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4149 ret = JNI_EVERSION; 4150 return ret; 4151 } else { 4152 *penv = NULL; 4153 ret = JNI_EVERSION; 4154 return ret; 4155 } 4156 } else { 4157 *penv = NULL; 4158 ret = JNI_EDETACHED; 4159 return ret; 4160 } 4161 } 4162 4163 4164 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4165 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4166 if (vm_created == 0) { 4167 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4168 return JNI_ERR; 4169 } 4170 4171 JNIWrapper("AttachCurrentThreadAsDaemon"); 4172 jint ret = attach_current_thread(vm, penv, _args, true); 4173 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4174 return ret; 4175 } 4176 4177 4178 } // End extern "C" 4179 4180 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4181 NULL, 4182 NULL, 4183 NULL, 4184 4185 jni_DestroyJavaVM, 4186 jni_AttachCurrentThread, 4187 jni_DetachCurrentThread, 4188 jni_GetEnv, 4189 jni_AttachCurrentThreadAsDaemon 4190 };