1 /* 2 * Copyright (c) 1997, 2019, 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/modules.hpp" 36 #include "classfile/symbolTable.hpp" 37 #include "classfile/systemDictionary.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "gc/shared/gcLocker.inline.hpp" 40 #include "interpreter/linkResolver.hpp" 41 #include "jfr/jfrEvents.hpp" 42 #include "jfr/support/jfrThreadId.hpp" 43 #include "logging/log.hpp" 44 #include "memory/allocation.hpp" 45 #include "memory/allocation.inline.hpp" 46 #include "memory/oopFactory.hpp" 47 #include "memory/resourceArea.hpp" 48 #include "memory/universe.hpp" 49 #include "oops/access.inline.hpp" 50 #include "oops/arrayOop.inline.hpp" 51 #include "oops/instanceKlass.hpp" 52 #include "oops/instanceOop.hpp" 53 #include "oops/markWord.hpp" 54 #include "oops/method.hpp" 55 #include "oops/objArrayKlass.hpp" 56 #include "oops/objArrayOop.inline.hpp" 57 #include "oops/oop.inline.hpp" 58 #include "oops/symbol.hpp" 59 #include "oops/typeArrayKlass.hpp" 60 #include "oops/typeArrayOop.inline.hpp" 61 #include "prims/jniCheck.hpp" 62 #include "prims/jniExport.hpp" 63 #include "prims/jniFastGetField.hpp" 64 #include "prims/jvm_misc.hpp" 65 #include "prims/jvmtiExport.hpp" 66 #include "prims/jvmtiThreadState.hpp" 67 #include "runtime/atomic.hpp" 68 #include "runtime/compilationPolicy.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/orderAccess.hpp" 77 #include "runtime/reflection.hpp" 78 #include "runtime/safepointVerifiers.hpp" 79 #include "runtime/sharedRuntime.hpp" 80 #include "runtime/signature.hpp" 81 #include "runtime/thread.inline.hpp" 82 #include "runtime/vmOperations.hpp" 83 #include "services/memTracker.hpp" 84 #include "services/runtimeService.hpp" 85 #include "utilities/defaultStream.hpp" 86 #include "utilities/dtrace.hpp" 87 #include "utilities/events.hpp" 88 #include "utilities/histogram.hpp" 89 #include "utilities/macros.hpp" 90 #include "utilities/vmError.hpp" 91 92 static jint CurrentVersion = JNI_VERSION_10; 93 94 #ifdef _WIN32 95 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 96 #endif 97 98 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 99 // '-return' probe regardless of the return path is taken out of the function. 100 // Methods that have multiple return paths use this to avoid having to 101 // instrument each return path. Methods that use CHECK or THROW must use this 102 // since those macros can cause an immedate uninstrumented return. 103 // 104 // In order to get the return value, a reference to the variable containing 105 // the return value must be passed to the contructor of the object, and 106 // the return value must be set before return (since the mark object has 107 // a reference to it). 108 // 109 // Example: 110 // DT_RETURN_MARK_DECL(SomeFunc, int); 111 // JNI_ENTRY(int, SomeFunc, ...) 112 // int return_value = 0; 113 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 114 // foo(CHECK_0) 115 // return_value = 5; 116 // return return_value; 117 // JNI_END 118 #define DT_RETURN_MARK_DECL(name, type, probe) \ 119 DTRACE_ONLY( \ 120 class DTraceReturnProbeMark_##name { \ 121 public: \ 122 const type& _ret_ref; \ 123 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 124 ~DTraceReturnProbeMark_##name() { \ 125 probe; \ 126 } \ 127 } \ 128 ) 129 // Void functions are simpler since there's no return value 130 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 131 DTRACE_ONLY( \ 132 class DTraceReturnProbeMark_##name { \ 133 public: \ 134 ~DTraceReturnProbeMark_##name() { \ 135 probe; \ 136 } \ 137 } \ 138 ) 139 140 // Place these macros in the function to mark the return. Non-void 141 // functions need the type and address of the return value. 142 #define DT_RETURN_MARK(name, type, ref) \ 143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 144 #define DT_VOID_RETURN_MARK(name) \ 145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 146 147 148 // Use these to select distinct code for floating-point vs. non-floating point 149 // situations. Used from within common macros where we need slightly 150 // different behavior for Float/Double 151 #define FP_SELECT_Boolean(intcode, fpcode) intcode 152 #define FP_SELECT_Byte(intcode, fpcode) intcode 153 #define FP_SELECT_Char(intcode, fpcode) intcode 154 #define FP_SELECT_Short(intcode, fpcode) intcode 155 #define FP_SELECT_Object(intcode, fpcode) intcode 156 #define FP_SELECT_Int(intcode, fpcode) intcode 157 #define FP_SELECT_Long(intcode, fpcode) intcode 158 #define FP_SELECT_Float(intcode, fpcode) fpcode 159 #define FP_SELECT_Double(intcode, fpcode) fpcode 160 #define FP_SELECT(TypeName, intcode, fpcode) \ 161 FP_SELECT_##TypeName(intcode, fpcode) 162 163 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 164 // (dtrace doesn't do FP yet) 165 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 166 FP_SELECT(TypeName, \ 167 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 168 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 171 172 173 // out-of-line helpers for class jfieldIDWorkaround: 174 175 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 176 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 177 uintptr_t as_uint = (uintptr_t) id; 178 intptr_t offset = raw_instance_offset(id); 179 if (is_checked_jfieldID(id)) { 180 if (!klass_hash_ok(k, id)) { 181 return false; 182 } 183 } 184 return InstanceKlass::cast(k)->contains_field_offset(offset); 185 } else { 186 JNIid* result = (JNIid*) id; 187 #ifdef ASSERT 188 return result != NULL && result->is_static_field_id(); 189 #else 190 return result != NULL; 191 #endif 192 } 193 } 194 195 196 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 197 if (offset <= small_offset_mask) { 198 Klass* field_klass = k; 199 Klass* super_klass = field_klass->super(); 200 // With compressed oops the most super class with nonstatic fields would 201 // be the owner of fields embedded in the header. 202 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 203 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 204 field_klass = super_klass; // super contains the field also 205 super_klass = field_klass->super(); 206 } 207 debug_only(NoSafepointVerifier nosafepoint;) 208 uintptr_t klass_hash = field_klass->identity_hash(); 209 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 210 } else { 211 #if 0 212 #ifndef PRODUCT 213 { 214 ResourceMark rm; 215 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 216 } 217 #endif 218 #endif 219 return 0; 220 } 221 } 222 223 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 224 uintptr_t as_uint = (uintptr_t) id; 225 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 226 do { 227 debug_only(NoSafepointVerifier nosafepoint;) 228 // Could use a non-blocking query for identity_hash here... 229 if ((k->identity_hash() & klass_mask) == klass_hash) 230 return true; 231 k = k->super(); 232 } while (k != NULL); 233 return false; 234 } 235 236 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 237 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 238 uintptr_t as_uint = (uintptr_t) id; 239 intptr_t offset = raw_instance_offset(id); 240 if (VerifyJNIFields) { 241 if (is_checked_jfieldID(id)) { 242 guarantee(klass_hash_ok(k, id), 243 "Bug in native code: jfieldID class must match object"); 244 } else { 245 #if 0 246 #ifndef PRODUCT 247 if (Verbose) { 248 ResourceMark rm; 249 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 250 } 251 #endif 252 #endif 253 } 254 } 255 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 256 "Bug in native code: jfieldID offset must address interior of object"); 257 } 258 259 // Wrapper to trace JNI functions 260 261 #ifdef ASSERT 262 Histogram* JNIHistogram; 263 static volatile int JNIHistogram_lock = 0; 264 265 class JNIHistogramElement : public HistogramElement { 266 public: 267 JNIHistogramElement(const char* name); 268 }; 269 270 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 271 _name = elementName; 272 uintx count = 0; 273 274 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 275 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 276 count +=1; 277 if ( (WarnOnStalledSpinLock > 0) 278 && (count % WarnOnStalledSpinLock == 0)) { 279 warning("JNIHistogram_lock seems to be stalled"); 280 } 281 } 282 } 283 284 285 if(JNIHistogram == NULL) 286 JNIHistogram = new Histogram("JNI Call Counts",100); 287 288 JNIHistogram->add_element(this); 289 Atomic::dec(&JNIHistogram_lock); 290 } 291 292 #define JNICountWrapper(arg) \ 293 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 294 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 295 if (e != NULL) e->increment_count() 296 #define JNIWrapper(arg) JNICountWrapper(arg); 297 #else 298 #define JNIWrapper(arg) 299 #endif 300 301 302 // Implementation of JNI entries 303 304 DT_RETURN_MARK_DECL(DefineClass, jclass 305 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 306 307 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 308 const jbyte *buf, jsize bufLen)) 309 JNIWrapper("DefineClass"); 310 311 HOTSPOT_JNI_DEFINECLASS_ENTRY( 312 env, (char*) name, loaderRef, (char*) buf, bufLen); 313 314 jclass cls = NULL; 315 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 316 317 TempNewSymbol class_name = NULL; 318 // Since exceptions can be thrown, class initialization can take place 319 // if name is NULL no check for class name in .class stream has to be made. 320 if (name != NULL) { 321 const int str_len = (int)strlen(name); 322 if (str_len > Symbol::max_length()) { 323 // It's impossible to create this class; the name cannot fit 324 // into the constant pool. 325 Exceptions::fthrow(THREAD_AND_LOCATION, 326 vmSymbols::java_lang_NoClassDefFoundError(), 327 "Class name exceeds maximum length of %d: %s", 328 Symbol::max_length(), 329 name); 330 return 0; 331 } 332 class_name = SymbolTable::new_symbol(name); 333 } 334 ResourceMark rm(THREAD); 335 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 336 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 337 338 if (UsePerfData && !class_loader.is_null()) { 339 // check whether the current caller thread holds the lock or not. 340 // If not, increment the corresponding counter 341 if (ObjectSynchronizer:: 342 query_lock_ownership((JavaThread*)THREAD, class_loader) != 343 ObjectSynchronizer::owner_self) { 344 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 345 } 346 } 347 Klass* k = SystemDictionary::resolve_from_stream(class_name, 348 class_loader, 349 Handle(), 350 &st, 351 CHECK_NULL); 352 353 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 354 trace_class_resolution(k); 355 } 356 357 cls = (jclass)JNIHandles::make_local( 358 env, k->java_mirror()); 359 return cls; 360 JNI_END 361 362 363 364 DT_RETURN_MARK_DECL(FindClass, jclass 365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 366 367 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 368 JNIWrapper("FindClass"); 369 370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 371 372 jclass result = NULL; 373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 374 375 // Sanity check the name: it cannot be null or larger than the maximum size 376 // name we can fit in the constant pool. 377 if (name == NULL) { 378 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 379 } 380 if ((int)strlen(name) > Symbol::max_length()) { 381 Exceptions::fthrow(THREAD_AND_LOCATION, 382 vmSymbols::java_lang_NoClassDefFoundError(), 383 "Class name exceeds maximum length of %d: %s", 384 Symbol::max_length(), 385 name); 386 return 0; 387 } 388 389 //%note jni_3 390 Handle protection_domain; 391 // Find calling class 392 Klass* k = thread->security_get_caller_class(0); 393 // default to the system loader when no context 394 Handle loader(THREAD, SystemDictionary::java_system_loader()); 395 if (k != NULL) { 396 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 397 // in the correct class context. 398 if (k->class_loader() == NULL && 399 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 400 JavaValue result(T_OBJECT); 401 JavaCalls::call_static(&result, k, 402 vmSymbols::getFromClass_name(), 403 vmSymbols::void_class_signature(), 404 CHECK_NULL); 405 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 406 // a non-NULL Class object. When invoked from JNI_OnUnload, 407 // it will return NULL to indicate no context. 408 oop mirror = (oop) result.get_jobject(); 409 if (mirror != NULL) { 410 Klass* fromClass = java_lang_Class::as_Klass(mirror); 411 loader = Handle(THREAD, fromClass->class_loader()); 412 protection_domain = Handle(THREAD, fromClass->protection_domain()); 413 } 414 } else { 415 loader = Handle(THREAD, k->class_loader()); 416 } 417 } 418 419 TempNewSymbol sym = SymbolTable::new_symbol(name); 420 result = find_class_from_class_loader(env, sym, true, true, loader, 421 protection_domain, true, thread); 422 423 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 424 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 425 } 426 427 return result; 428 JNI_END 429 430 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 431 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 432 433 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 434 JNIWrapper("FromReflectedMethod"); 435 436 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 437 438 jmethodID ret = NULL; 439 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 440 441 // method is a handle to a java.lang.reflect.Method object 442 oop reflected = JNIHandles::resolve_non_null(method); 443 oop mirror = NULL; 444 int slot = 0; 445 446 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 447 mirror = java_lang_reflect_Constructor::clazz(reflected); 448 slot = java_lang_reflect_Constructor::slot(reflected); 449 } else { 450 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 451 mirror = java_lang_reflect_Method::clazz(reflected); 452 slot = java_lang_reflect_Method::slot(reflected); 453 } 454 Klass* k1 = java_lang_Class::as_Klass(mirror); 455 456 // Make sure class is initialized before handing id's out to methods 457 k1->initialize(CHECK_NULL); 458 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 459 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 460 return ret; 461 JNI_END 462 463 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 464 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 465 466 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 467 JNIWrapper("FromReflectedField"); 468 469 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 470 471 jfieldID ret = NULL; 472 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 473 474 // field is a handle to a java.lang.reflect.Field object 475 oop reflected = JNIHandles::resolve_non_null(field); 476 oop mirror = java_lang_reflect_Field::clazz(reflected); 477 Klass* k1 = java_lang_Class::as_Klass(mirror); 478 int slot = java_lang_reflect_Field::slot(reflected); 479 int modifiers = java_lang_reflect_Field::modifiers(reflected); 480 481 // Make sure class is initialized before handing id's out to fields 482 k1->initialize(CHECK_NULL); 483 484 // First check if this is a static field 485 if (modifiers & JVM_ACC_STATIC) { 486 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 487 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 488 assert(id != NULL, "corrupt Field object"); 489 debug_only(id->set_is_static_field_id();) 490 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 491 ret = jfieldIDWorkaround::to_static_jfieldID(id); 492 return ret; 493 } 494 495 // The slot is the index of the field description in the field-array 496 // The jfieldID is the offset of the field within the object 497 // It may also have hash bits for k, if VerifyJNIFields is turned on. 498 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 499 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 500 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 501 return ret; 502 JNI_END 503 504 505 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 506 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 507 508 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 509 JNIWrapper("ToReflectedMethod"); 510 511 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 512 513 jobject ret = NULL; 514 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 515 516 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 517 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 518 oop reflection_method; 519 if (m->is_initializer()) { 520 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 521 } else { 522 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 523 } 524 ret = JNIHandles::make_local(env, reflection_method); 525 return ret; 526 JNI_END 527 528 DT_RETURN_MARK_DECL(GetSuperclass, jclass 529 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 530 531 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 532 JNIWrapper("GetSuperclass"); 533 534 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 535 536 jclass obj = NULL; 537 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 538 539 oop mirror = JNIHandles::resolve_non_null(sub); 540 // primitive classes return NULL 541 if (java_lang_Class::is_primitive(mirror)) return NULL; 542 543 // Rules of Class.getSuperClass as implemented by KLass::java_super: 544 // arrays return Object 545 // interfaces return NULL 546 // proper classes return Klass::super() 547 Klass* k = java_lang_Class::as_Klass(mirror); 548 if (k->is_interface()) return NULL; 549 550 // return mirror for superclass 551 Klass* super = k->java_super(); 552 // super2 is the value computed by the compiler's getSuperClass intrinsic: 553 debug_only(Klass* super2 = ( k->is_array_klass() 554 ? SystemDictionary::Object_klass() 555 : k->super() ) ); 556 assert(super == super2, 557 "java_super computation depends on interface, array, other super"); 558 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 559 return obj; 560 JNI_END 561 562 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 563 JNIWrapper("IsSubclassOf"); 564 565 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 566 567 oop sub_mirror = JNIHandles::resolve_non_null(sub); 568 oop super_mirror = JNIHandles::resolve_non_null(super); 569 if (java_lang_Class::is_primitive(sub_mirror) || 570 java_lang_Class::is_primitive(super_mirror)) { 571 jboolean ret = oopDesc::equals(sub_mirror, super_mirror); 572 573 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 574 return ret; 575 } 576 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 577 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 578 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 579 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 580 JNI_TRUE : JNI_FALSE; 581 582 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 583 return ret; 584 JNI_END 585 586 587 DT_RETURN_MARK_DECL(Throw, jint 588 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 589 590 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 591 JNIWrapper("Throw"); 592 593 HOTSPOT_JNI_THROW_ENTRY(env, obj); 594 595 jint ret = JNI_OK; 596 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 597 598 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 599 ShouldNotReachHere(); 600 return 0; // Mute compiler. 601 JNI_END 602 603 604 DT_RETURN_MARK_DECL(ThrowNew, jint 605 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 606 607 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 608 JNIWrapper("ThrowNew"); 609 610 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 611 612 jint ret = JNI_OK; 613 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 614 615 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 616 Symbol* name = k->name(); 617 Handle class_loader (THREAD, k->class_loader()); 618 Handle protection_domain (THREAD, k->protection_domain()); 619 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 620 ShouldNotReachHere(); 621 return 0; // Mute compiler. 622 JNI_END 623 624 625 // JNI functions only transform a pending async exception to a synchronous 626 // exception in ExceptionOccurred and ExceptionCheck calls, since 627 // delivering an async exception in other places won't change the native 628 // code's control flow and would be harmful when native code further calls 629 // JNI functions with a pending exception. Async exception is also checked 630 // during the call, so ExceptionOccurred/ExceptionCheck won't return 631 // false but deliver the async exception at the very end during 632 // state transition. 633 634 static void jni_check_async_exceptions(JavaThread *thread) { 635 assert(thread == Thread::current(), "must be itself"); 636 thread->check_and_handle_async_exceptions(); 637 } 638 639 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 640 JNIWrapper("ExceptionOccurred"); 641 642 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 643 644 jni_check_async_exceptions(thread); 645 oop exception = thread->pending_exception(); 646 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 647 648 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 649 return ret; 650 JNI_END 651 652 653 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 654 JNIWrapper("ExceptionDescribe"); 655 656 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 657 658 if (thread->has_pending_exception()) { 659 Handle ex(thread, thread->pending_exception()); 660 thread->clear_pending_exception(); 661 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 662 // Don't print anything if we are being killed. 663 } else { 664 jio_fprintf(defaultStream::error_stream(), "Exception "); 665 if (thread != NULL && thread->threadObj() != NULL) { 666 ResourceMark rm(THREAD); 667 jio_fprintf(defaultStream::error_stream(), 668 "in thread \"%s\" ", thread->get_thread_name()); 669 } 670 if (ex->is_a(SystemDictionary::Throwable_klass())) { 671 JavaValue result(T_VOID); 672 JavaCalls::call_virtual(&result, 673 ex, 674 SystemDictionary::Throwable_klass(), 675 vmSymbols::printStackTrace_name(), 676 vmSymbols::void_method_signature(), 677 THREAD); 678 // If an exception is thrown in the call it gets thrown away. Not much 679 // we can do with it. The native code that calls this, does not check 680 // for the exception - hence, it might still be in the thread when DestroyVM gets 681 // called, potentially causing a few asserts to trigger - since no pending exception 682 // is expected. 683 CLEAR_PENDING_EXCEPTION; 684 } else { 685 ResourceMark rm(THREAD); 686 jio_fprintf(defaultStream::error_stream(), 687 ". Uncaught exception of type %s.", 688 ex->klass()->external_name()); 689 } 690 } 691 } 692 693 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 694 JNI_END 695 696 697 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 698 JNIWrapper("ExceptionClear"); 699 700 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 701 702 // The jni code might be using this API to clear java thrown exception. 703 // So just mark jvmti thread exception state as exception caught. 704 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 705 if (state != NULL && state->is_exception_detected()) { 706 state->set_exception_caught(); 707 } 708 thread->clear_pending_exception(); 709 710 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 711 JNI_END 712 713 714 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 715 JNIWrapper("FatalError"); 716 717 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 718 719 tty->print_cr("FATAL ERROR in native method: %s", msg); 720 thread->print_stack(); 721 os::abort(); // Dump core and abort 722 JNI_END 723 724 725 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 726 JNIWrapper("PushLocalFrame"); 727 728 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 729 730 //%note jni_11 731 if (capacity < 0 || 732 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 733 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 734 return JNI_ERR; 735 } 736 JNIHandleBlock* old_handles = thread->active_handles(); 737 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 738 assert(new_handles != NULL, "should not be NULL"); 739 new_handles->set_pop_frame_link(old_handles); 740 thread->set_active_handles(new_handles); 741 jint ret = JNI_OK; 742 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 743 return ret; 744 JNI_END 745 746 747 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 748 JNIWrapper("PopLocalFrame"); 749 750 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 751 752 //%note jni_11 753 Handle result_handle(thread, JNIHandles::resolve(result)); 754 JNIHandleBlock* old_handles = thread->active_handles(); 755 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 756 if (new_handles != NULL) { 757 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 758 // This way code will still work if PopLocalFrame is called without a corresponding 759 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 760 // the release_block call will release the blocks. 761 thread->set_active_handles(new_handles); 762 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 763 JNIHandleBlock::release_block(old_handles, thread); // may block 764 result = JNIHandles::make_local(thread, result_handle()); 765 } 766 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 767 return result; 768 JNI_END 769 770 771 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 772 JNIWrapper("NewGlobalRef"); 773 774 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 775 776 Handle ref_handle(thread, JNIHandles::resolve(ref)); 777 jobject ret = JNIHandles::make_global(ref_handle); 778 779 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 780 return ret; 781 JNI_END 782 783 // Must be JNI_ENTRY (with HandleMark) 784 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 785 JNIWrapper("DeleteGlobalRef"); 786 787 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 788 789 JNIHandles::destroy_global(ref); 790 791 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 792 JNI_END 793 794 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 795 JNIWrapper("DeleteLocalRef"); 796 797 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 798 799 JNIHandles::destroy_local(obj); 800 801 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 802 JNI_END 803 804 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 805 JNIWrapper("IsSameObject"); 806 807 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 808 809 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 810 811 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 812 return ret; 813 JNI_END 814 815 816 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 817 JNIWrapper("NewLocalRef"); 818 819 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 820 821 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 822 823 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 824 return ret; 825 JNI_END 826 827 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 828 JNIWrapper("EnsureLocalCapacity"); 829 830 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 831 832 jint ret; 833 if (capacity >= 0 && 834 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 835 ret = JNI_OK; 836 } else { 837 ret = JNI_ERR; 838 } 839 840 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 841 return ret; 842 JNI_END 843 844 // Return the Handle Type 845 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 846 JNIWrapper("GetObjectRefType"); 847 848 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 849 850 jobjectRefType ret = JNIInvalidRefType; 851 if (obj != NULL) { 852 ret = JNIHandles::handle_type(thread, obj); 853 } 854 855 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 856 return ret; 857 JNI_END 858 859 860 class JNI_ArgumentPusher : public SignatureIterator { 861 protected: 862 JavaCallArguments* _arguments; 863 864 virtual void get_bool () = 0; 865 virtual void get_char () = 0; 866 virtual void get_short () = 0; 867 virtual void get_byte () = 0; 868 virtual void get_int () = 0; 869 virtual void get_long () = 0; 870 virtual void get_float () = 0; 871 virtual void get_double () = 0; 872 virtual void get_object () = 0; 873 874 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 875 this->_return_type = T_ILLEGAL; 876 _arguments = NULL; 877 } 878 879 public: 880 virtual void iterate( uint64_t fingerprint ) = 0; 881 882 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 883 884 inline void do_bool() { if (!is_return_type()) get_bool(); } 885 inline void do_char() { if (!is_return_type()) get_char(); } 886 inline void do_short() { if (!is_return_type()) get_short(); } 887 inline void do_byte() { if (!is_return_type()) get_byte(); } 888 inline void do_int() { if (!is_return_type()) get_int(); } 889 inline void do_long() { if (!is_return_type()) get_long(); } 890 inline void do_float() { if (!is_return_type()) get_float(); } 891 inline void do_double() { if (!is_return_type()) get_double(); } 892 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 893 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 894 inline void do_void() { } 895 896 JavaCallArguments* arguments() { return _arguments; } 897 void push_receiver(Handle h) { _arguments->push_oop(h); } 898 }; 899 900 901 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 902 protected: 903 va_list _ap; 904 905 inline void get_bool() { 906 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 907 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 908 // TemplateInterpreterGenerator::generate_result_handler_for and 909 // SharedRuntime::generate_native_wrapper. 910 jboolean b = va_arg(_ap, jint); 911 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 912 } 913 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 914 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 915 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 916 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 917 918 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 919 920 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 921 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 922 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 923 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 924 925 inline void set_ap(va_list rap) { 926 va_copy(_ap, rap); 927 } 928 929 public: 930 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 931 : JNI_ArgumentPusher(signature) { 932 set_ap(rap); 933 } 934 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 935 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 936 set_ap(rap); 937 } 938 939 // Optimized path if we have the bitvector form of signature 940 void iterate( uint64_t fingerprint ) { 941 if (fingerprint == (uint64_t)CONST64(-1)) { 942 SignatureIterator::iterate(); // Must be too many arguments 943 } else { 944 _return_type = (BasicType)((fingerprint >> static_feature_size) & 945 result_feature_mask); 946 947 assert(fingerprint, "Fingerprint should not be 0"); 948 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 949 while ( 1 ) { 950 switch ( fingerprint & parameter_feature_mask ) { 951 case bool_parm: 952 get_bool(); 953 break; 954 case char_parm: 955 get_char(); 956 break; 957 case short_parm: 958 get_short(); 959 break; 960 case byte_parm: 961 get_byte(); 962 break; 963 case int_parm: 964 get_int(); 965 break; 966 case obj_parm: 967 get_object(); 968 break; 969 case long_parm: 970 get_long(); 971 break; 972 case float_parm: 973 get_float(); 974 break; 975 case double_parm: 976 get_double(); 977 break; 978 case done_parm: 979 return; 980 break; 981 default: 982 ShouldNotReachHere(); 983 break; 984 } 985 fingerprint >>= parameter_feature_size; 986 } 987 } 988 } 989 }; 990 991 992 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 993 protected: 994 const jvalue *_ap; 995 996 inline void get_bool() { 997 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 998 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 999 // TemplateInterpreterGenerator::generate_result_handler_for and 1000 // SharedRuntime::generate_native_wrapper. 1001 jboolean b = (_ap++)->z; 1002 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1003 } 1004 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1005 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1006 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1007 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1008 1009 inline void get_long() { _arguments->push_long((_ap++)->j); } 1010 inline void get_float() { _arguments->push_float((_ap++)->f); } 1011 inline void get_double() { _arguments->push_double((_ap++)->d);} 1012 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1013 1014 inline void set_ap(const jvalue *rap) { _ap = rap; } 1015 1016 public: 1017 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1018 : JNI_ArgumentPusher(signature) { 1019 set_ap(rap); 1020 } 1021 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1022 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1023 set_ap(rap); 1024 } 1025 1026 // Optimized path if we have the bitvector form of signature 1027 void iterate( uint64_t fingerprint ) { 1028 if (fingerprint == (uint64_t)CONST64(-1)) { 1029 SignatureIterator::iterate(); // Must be too many arguments 1030 } else { 1031 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1032 result_feature_mask); 1033 assert(fingerprint, "Fingerprint should not be 0"); 1034 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1035 while ( 1 ) { 1036 switch ( fingerprint & parameter_feature_mask ) { 1037 case bool_parm: 1038 get_bool(); 1039 break; 1040 case char_parm: 1041 get_char(); 1042 break; 1043 case short_parm: 1044 get_short(); 1045 break; 1046 case byte_parm: 1047 get_byte(); 1048 break; 1049 case int_parm: 1050 get_int(); 1051 break; 1052 case obj_parm: 1053 get_object(); 1054 break; 1055 case long_parm: 1056 get_long(); 1057 break; 1058 case float_parm: 1059 get_float(); 1060 break; 1061 case double_parm: 1062 get_double(); 1063 break; 1064 case done_parm: 1065 return; 1066 break; 1067 default: 1068 ShouldNotReachHere(); 1069 break; 1070 } 1071 fingerprint >>= parameter_feature_size; 1072 } 1073 } 1074 } 1075 }; 1076 1077 1078 enum JNICallType { 1079 JNI_STATIC, 1080 JNI_VIRTUAL, 1081 JNI_NONVIRTUAL 1082 }; 1083 1084 1085 1086 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1087 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1088 1089 // Create object to hold arguments for the JavaCall, and associate it with 1090 // the jni parser 1091 ResourceMark rm(THREAD); 1092 int number_of_parameters = method->size_of_parameters(); 1093 JavaCallArguments java_args(number_of_parameters); 1094 args->set_java_argument_object(&java_args); 1095 1096 assert(method->is_static(), "method should be static"); 1097 1098 // Fill out JavaCallArguments object 1099 args->iterate( Fingerprinter(method).fingerprint() ); 1100 // Initialize result type 1101 result->set_type(args->get_ret_type()); 1102 1103 // Invoke the method. Result is returned as oop. 1104 JavaCalls::call(result, method, &java_args, CHECK); 1105 1106 // Convert result 1107 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1108 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1109 } 1110 } 1111 1112 1113 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1114 oop recv = JNIHandles::resolve(receiver); 1115 if (recv == NULL) { 1116 THROW(vmSymbols::java_lang_NullPointerException()); 1117 } 1118 Handle h_recv(THREAD, recv); 1119 1120 int number_of_parameters; 1121 Method* selected_method; 1122 { 1123 Method* m = Method::resolve_jmethod_id(method_id); 1124 number_of_parameters = m->size_of_parameters(); 1125 Klass* holder = m->method_holder(); 1126 if (call_type != JNI_VIRTUAL) { 1127 selected_method = m; 1128 } else if (!m->has_itable_index()) { 1129 // non-interface call -- for that little speed boost, don't handlize 1130 debug_only(NoSafepointVerifier nosafepoint;) 1131 // jni_GetMethodID makes sure class is linked and initialized 1132 // so m should have a valid vtable index. 1133 assert(m->valid_vtable_index(), "no valid vtable index"); 1134 int vtbl_index = m->vtable_index(); 1135 if (vtbl_index != Method::nonvirtual_vtable_index) { 1136 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1137 } else { 1138 // final method 1139 selected_method = m; 1140 } 1141 } else { 1142 // interface call 1143 int itbl_index = m->itable_index(); 1144 Klass* k = h_recv->klass(); 1145 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1146 } 1147 } 1148 1149 methodHandle method(THREAD, selected_method); 1150 1151 // Create object to hold arguments for the JavaCall, and associate it with 1152 // the jni parser 1153 ResourceMark rm(THREAD); 1154 JavaCallArguments java_args(number_of_parameters); 1155 args->set_java_argument_object(&java_args); 1156 1157 // handle arguments 1158 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1159 args->push_receiver(h_recv); // Push jobject handle 1160 1161 // Fill out JavaCallArguments object 1162 args->iterate( Fingerprinter(method).fingerprint() ); 1163 // Initialize result type 1164 result->set_type(args->get_ret_type()); 1165 1166 // Invoke the method. Result is returned as oop. 1167 JavaCalls::call(result, method, &java_args, CHECK); 1168 1169 // Convert result 1170 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1171 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1172 } 1173 } 1174 1175 1176 static instanceOop alloc_object(jclass clazz, TRAPS) { 1177 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1178 if (k == NULL) { 1179 ResourceMark rm(THREAD); 1180 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1181 } 1182 k->check_valid_for_instantiation(false, CHECK_NULL); 1183 k->initialize(CHECK_NULL); 1184 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1185 return ih; 1186 } 1187 1188 DT_RETURN_MARK_DECL(AllocObject, jobject 1189 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1190 1191 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1192 JNIWrapper("AllocObject"); 1193 1194 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1195 1196 jobject ret = NULL; 1197 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1198 1199 instanceOop i = alloc_object(clazz, CHECK_NULL); 1200 ret = JNIHandles::make_local(env, i); 1201 return ret; 1202 JNI_END 1203 1204 DT_RETURN_MARK_DECL(NewObjectA, jobject 1205 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1206 1207 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1208 JNIWrapper("NewObjectA"); 1209 1210 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1211 1212 jobject obj = NULL; 1213 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1214 1215 instanceOop i = alloc_object(clazz, CHECK_NULL); 1216 obj = JNIHandles::make_local(env, i); 1217 JavaValue jvalue(T_VOID); 1218 JNI_ArgumentPusherArray ap(methodID, args); 1219 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1220 return obj; 1221 JNI_END 1222 1223 1224 DT_RETURN_MARK_DECL(NewObjectV, jobject 1225 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1226 1227 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1228 JNIWrapper("NewObjectV"); 1229 1230 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1231 1232 jobject obj = NULL; 1233 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1234 1235 instanceOop i = alloc_object(clazz, CHECK_NULL); 1236 obj = JNIHandles::make_local(env, i); 1237 JavaValue jvalue(T_VOID); 1238 JNI_ArgumentPusherVaArg ap(methodID, args); 1239 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1240 return obj; 1241 JNI_END 1242 1243 1244 DT_RETURN_MARK_DECL(NewObject, jobject 1245 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1246 1247 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1248 JNIWrapper("NewObject"); 1249 1250 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1251 1252 jobject obj = NULL; 1253 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1254 1255 instanceOop i = alloc_object(clazz, CHECK_NULL); 1256 obj = JNIHandles::make_local(env, i); 1257 va_list args; 1258 va_start(args, methodID); 1259 JavaValue jvalue(T_VOID); 1260 JNI_ArgumentPusherVaArg ap(methodID, args); 1261 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1262 va_end(args); 1263 return obj; 1264 JNI_END 1265 1266 1267 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1268 JNIWrapper("GetObjectClass"); 1269 1270 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1271 1272 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1273 jclass ret = 1274 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1275 1276 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1277 return ret; 1278 JNI_END 1279 1280 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1281 JNIWrapper("IsInstanceOf"); 1282 1283 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1284 1285 jboolean ret = JNI_TRUE; 1286 if (obj != NULL) { 1287 ret = JNI_FALSE; 1288 Klass* k = java_lang_Class::as_Klass( 1289 JNIHandles::resolve_non_null(clazz)); 1290 if (k != NULL) { 1291 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1292 } 1293 } 1294 1295 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1296 return ret; 1297 JNI_END 1298 1299 1300 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1301 const char *sig, bool is_static, TRAPS) { 1302 // %%%% This code should probably just call into a method in the LinkResolver 1303 // 1304 // The class should have been loaded (we have an instance of the class 1305 // passed in) so the method and signature should already be in the symbol 1306 // table. If they're not there, the method doesn't exist. 1307 const char *name_to_probe = (name_str == NULL) 1308 ? vmSymbols::object_initializer_name()->as_C_string() 1309 : name_str; 1310 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1311 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1312 1313 if (name == NULL || signature == NULL) { 1314 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1315 } 1316 1317 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1318 1319 // Throw a NoSuchMethodError exception if we have an instance of a 1320 // primitive java.lang.Class 1321 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1322 ResourceMark rm; 1323 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1324 } 1325 1326 // Make sure class is linked and initialized before handing id's out to 1327 // Method*s. 1328 klass->initialize(CHECK_NULL); 1329 1330 Method* m; 1331 if (name == vmSymbols::object_initializer_name() || 1332 name == vmSymbols::class_initializer_name()) { 1333 // Never search superclasses for constructors 1334 if (klass->is_instance_klass()) { 1335 m = InstanceKlass::cast(klass)->find_method(name, signature); 1336 } else { 1337 m = NULL; 1338 } 1339 } else { 1340 m = klass->lookup_method(name, signature); 1341 if (m == NULL && klass->is_instance_klass()) { 1342 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1343 } 1344 } 1345 if (m == NULL || (m->is_static() != is_static)) { 1346 ResourceMark rm; 1347 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1348 } 1349 return m->jmethod_id(); 1350 } 1351 1352 1353 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1354 const char *name, const char *sig)) 1355 JNIWrapper("GetMethodID"); 1356 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1357 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1358 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1359 return ret; 1360 JNI_END 1361 1362 1363 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1364 const char *name, const char *sig)) 1365 JNIWrapper("GetStaticMethodID"); 1366 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1367 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1368 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1369 return ret; 1370 JNI_END 1371 1372 1373 1374 // 1375 // Calling Methods 1376 // 1377 1378 1379 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1380 , EntryProbe, ReturnProbe) \ 1381 \ 1382 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1383 , ReturnProbe); \ 1384 \ 1385 JNI_ENTRY(ResultType, \ 1386 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1387 JNIWrapper("Call" XSTR(Result) "Method"); \ 1388 \ 1389 EntryProbe; \ 1390 ResultType ret = 0;\ 1391 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1392 (const ResultType&)ret);\ 1393 \ 1394 va_list args; \ 1395 va_start(args, methodID); \ 1396 JavaValue jvalue(Tag); \ 1397 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1398 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1399 va_end(args); \ 1400 ret = jvalue.get_##ResultType(); \ 1401 return ret;\ 1402 JNI_END 1403 1404 // the runtime type of subword integral basic types is integer 1405 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1406 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1407 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1408 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1409 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1410 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1411 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1412 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1413 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1414 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1415 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1416 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1417 1418 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1419 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1420 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1421 DEFINE_CALLMETHOD(jint, Int, T_INT, 1422 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1423 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1424 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1425 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1426 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1427 // Float and double probes don't return value because dtrace doesn't currently support it 1428 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1429 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1431 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1432 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1434 1435 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1436 , EntryProbe, ReturnProbe) \ 1437 \ 1438 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1439 , ReturnProbe); \ 1440 \ 1441 JNI_ENTRY(ResultType, \ 1442 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1443 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1444 \ 1445 EntryProbe;\ 1446 ResultType ret = 0;\ 1447 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1448 (const ResultType&)ret);\ 1449 \ 1450 JavaValue jvalue(Tag); \ 1451 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1452 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1453 ret = jvalue.get_##ResultType(); \ 1454 return ret;\ 1455 JNI_END 1456 1457 // the runtime type of subword integral basic types is integer 1458 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1459 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1460 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1461 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1462 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1463 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1464 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1465 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1466 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1467 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1468 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1469 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1470 1471 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1472 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1473 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1474 DEFINE_CALLMETHODV(jint, Int, T_INT, 1475 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1477 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1478 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1480 // Float and double probes don't return value because dtrace doesn't currently support it 1481 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1482 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1484 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1485 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1487 1488 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1489 , EntryProbe, ReturnProbe) \ 1490 \ 1491 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1492 , ReturnProbe); \ 1493 \ 1494 JNI_ENTRY(ResultType, \ 1495 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1496 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1497 EntryProbe; \ 1498 ResultType ret = 0;\ 1499 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1500 (const ResultType&)ret);\ 1501 \ 1502 JavaValue jvalue(Tag); \ 1503 JNI_ArgumentPusherArray ap(methodID, args); \ 1504 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1505 ret = jvalue.get_##ResultType(); \ 1506 return ret;\ 1507 JNI_END 1508 1509 // the runtime type of subword integral basic types is integer 1510 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1511 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1512 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1513 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1514 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1515 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1516 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1517 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1518 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1519 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1520 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1521 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1522 1523 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1524 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1525 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1526 DEFINE_CALLMETHODA(jint, Int, T_INT, 1527 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1529 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1530 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1531 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1532 // Float and double probes don't return value because dtrace doesn't currently support it 1533 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1534 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1536 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1537 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1539 1540 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1541 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1542 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1543 1544 1545 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1546 JNIWrapper("CallVoidMethod"); 1547 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1548 DT_VOID_RETURN_MARK(CallVoidMethod); 1549 1550 va_list args; 1551 va_start(args, methodID); 1552 JavaValue jvalue(T_VOID); 1553 JNI_ArgumentPusherVaArg ap(methodID, args); 1554 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1555 va_end(args); 1556 JNI_END 1557 1558 1559 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1560 JNIWrapper("CallVoidMethodV"); 1561 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1562 DT_VOID_RETURN_MARK(CallVoidMethodV); 1563 1564 JavaValue jvalue(T_VOID); 1565 JNI_ArgumentPusherVaArg ap(methodID, args); 1566 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1567 JNI_END 1568 1569 1570 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1571 JNIWrapper("CallVoidMethodA"); 1572 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1573 DT_VOID_RETURN_MARK(CallVoidMethodA); 1574 1575 JavaValue jvalue(T_VOID); 1576 JNI_ArgumentPusherArray ap(methodID, args); 1577 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1578 JNI_END 1579 1580 1581 1582 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1583 , EntryProbe, ReturnProbe) \ 1584 \ 1585 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1586 , ReturnProbe);\ 1587 \ 1588 JNI_ENTRY(ResultType, \ 1589 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1590 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1591 \ 1592 EntryProbe;\ 1593 ResultType ret;\ 1594 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1595 (const ResultType&)ret);\ 1596 \ 1597 va_list args; \ 1598 va_start(args, methodID); \ 1599 JavaValue jvalue(Tag); \ 1600 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1601 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1602 va_end(args); \ 1603 ret = jvalue.get_##ResultType(); \ 1604 return ret;\ 1605 JNI_END 1606 1607 // the runtime type of subword integral basic types is integer 1608 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1609 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1610 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1611 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1612 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1613 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1614 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1615 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1616 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1617 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1618 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1619 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1620 1621 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1622 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1623 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1624 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1625 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1627 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1628 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1629 // Float and double probes don't return value because dtrace doesn't currently support it 1630 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1631 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1632 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1634 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1635 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1637 1638 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1639 , EntryProbe, ReturnProbe) \ 1640 \ 1641 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1642 , ReturnProbe);\ 1643 \ 1644 JNI_ENTRY(ResultType, \ 1645 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1646 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1647 \ 1648 EntryProbe;\ 1649 ResultType ret;\ 1650 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1651 (const ResultType&)ret);\ 1652 \ 1653 JavaValue jvalue(Tag); \ 1654 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1655 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1656 ret = jvalue.get_##ResultType(); \ 1657 return ret;\ 1658 JNI_END 1659 1660 // the runtime type of subword integral basic types is integer 1661 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1662 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1663 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1664 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1665 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1666 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1667 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1668 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1669 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1670 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1671 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1672 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1673 1674 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1675 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1676 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1677 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1678 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1680 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1681 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1682 // Float and double probes don't return value because dtrace doesn't currently support it 1683 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1684 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1685 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1687 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1688 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1690 1691 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1692 , EntryProbe, ReturnProbe) \ 1693 \ 1694 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1695 , ReturnProbe);\ 1696 \ 1697 JNI_ENTRY(ResultType, \ 1698 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1699 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1700 \ 1701 EntryProbe;\ 1702 ResultType ret;\ 1703 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1704 (const ResultType&)ret);\ 1705 \ 1706 JavaValue jvalue(Tag); \ 1707 JNI_ArgumentPusherArray ap(methodID, args); \ 1708 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1709 ret = jvalue.get_##ResultType(); \ 1710 return ret;\ 1711 JNI_END 1712 1713 // the runtime type of subword integral basic types is integer 1714 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1715 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1716 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1717 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1718 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1719 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1720 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1721 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1722 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1723 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1724 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1725 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1726 1727 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1728 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1729 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1730 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1731 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1732 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1733 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1734 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1735 // Float and double probes don't return value because dtrace doesn't currently support it 1736 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1737 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1738 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1740 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1741 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1743 1744 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1745 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1746 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1747 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1748 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1749 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1750 1751 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1752 JNIWrapper("CallNonvirtualVoidMethod"); 1753 1754 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1755 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1756 1757 va_list args; 1758 va_start(args, methodID); 1759 JavaValue jvalue(T_VOID); 1760 JNI_ArgumentPusherVaArg ap(methodID, args); 1761 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1762 va_end(args); 1763 JNI_END 1764 1765 1766 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1767 JNIWrapper("CallNonvirtualVoidMethodV"); 1768 1769 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1770 env, obj, cls, (uintptr_t) methodID); 1771 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1772 1773 JavaValue jvalue(T_VOID); 1774 JNI_ArgumentPusherVaArg ap(methodID, args); 1775 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1776 JNI_END 1777 1778 1779 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1780 JNIWrapper("CallNonvirtualVoidMethodA"); 1781 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1782 env, obj, cls, (uintptr_t) methodID); 1783 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1784 JavaValue jvalue(T_VOID); 1785 JNI_ArgumentPusherArray ap(methodID, args); 1786 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1787 JNI_END 1788 1789 1790 1791 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1792 , EntryProbe, ResultProbe) \ 1793 \ 1794 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1795 , ResultProbe); \ 1796 \ 1797 JNI_ENTRY(ResultType, \ 1798 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1799 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1800 \ 1801 EntryProbe; \ 1802 ResultType ret = 0;\ 1803 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1804 (const ResultType&)ret);\ 1805 \ 1806 va_list args; \ 1807 va_start(args, methodID); \ 1808 JavaValue jvalue(Tag); \ 1809 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1810 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1811 va_end(args); \ 1812 ret = jvalue.get_##ResultType(); \ 1813 return ret;\ 1814 JNI_END 1815 1816 // the runtime type of subword integral basic types is integer 1817 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1818 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1819 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1820 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1821 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1822 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1823 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1824 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1825 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1826 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1827 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1828 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1829 1830 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1831 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1832 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1833 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1834 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1835 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1836 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1837 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1838 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1839 // Float and double probes don't return value because dtrace doesn't currently support it 1840 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1841 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1843 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1844 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1846 1847 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1848 , EntryProbe, ResultProbe) \ 1849 \ 1850 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1851 , ResultProbe); \ 1852 \ 1853 JNI_ENTRY(ResultType, \ 1854 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1855 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1856 \ 1857 EntryProbe; \ 1858 ResultType ret = 0;\ 1859 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1860 (const ResultType&)ret);\ 1861 \ 1862 JavaValue jvalue(Tag); \ 1863 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1864 /* Make sure class is initialized before trying to invoke its method */ \ 1865 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1866 k->initialize(CHECK_0); \ 1867 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1868 va_end(args); \ 1869 ret = jvalue.get_##ResultType(); \ 1870 return ret;\ 1871 JNI_END 1872 1873 // the runtime type of subword integral basic types is integer 1874 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1875 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1876 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1877 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1878 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1879 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1880 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1881 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1882 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1883 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1884 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1885 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1886 1887 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1888 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1889 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1890 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1891 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1892 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1893 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1894 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1895 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1896 // Float and double probes don't return value because dtrace doesn't currently support it 1897 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1898 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1900 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1901 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1903 1904 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1905 , EntryProbe, ResultProbe) \ 1906 \ 1907 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1908 , ResultProbe); \ 1909 \ 1910 JNI_ENTRY(ResultType, \ 1911 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1912 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1913 \ 1914 EntryProbe; \ 1915 ResultType ret = 0;\ 1916 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1917 (const ResultType&)ret);\ 1918 \ 1919 JavaValue jvalue(Tag); \ 1920 JNI_ArgumentPusherArray ap(methodID, args); \ 1921 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1922 ret = jvalue.get_##ResultType(); \ 1923 return ret;\ 1924 JNI_END 1925 1926 // the runtime type of subword integral basic types is integer 1927 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1928 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1929 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1930 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1931 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1932 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1933 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1934 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1935 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1936 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1937 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1938 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1939 1940 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1941 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1942 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1943 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1944 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1945 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1946 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1947 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1948 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1949 // Float and double probes don't return value because dtrace doesn't currently support it 1950 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1951 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1953 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1954 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1956 1957 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1958 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1959 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1960 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1961 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1962 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1963 1964 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1965 JNIWrapper("CallStaticVoidMethod"); 1966 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1967 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1968 1969 va_list args; 1970 va_start(args, methodID); 1971 JavaValue jvalue(T_VOID); 1972 JNI_ArgumentPusherVaArg ap(methodID, args); 1973 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1974 va_end(args); 1975 JNI_END 1976 1977 1978 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1979 JNIWrapper("CallStaticVoidMethodV"); 1980 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1981 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1982 1983 JavaValue jvalue(T_VOID); 1984 JNI_ArgumentPusherVaArg ap(methodID, args); 1985 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1986 JNI_END 1987 1988 1989 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1990 JNIWrapper("CallStaticVoidMethodA"); 1991 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1992 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1993 1994 JavaValue jvalue(T_VOID); 1995 JNI_ArgumentPusherArray ap(methodID, args); 1996 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1997 JNI_END 1998 1999 2000 // 2001 // Accessing Fields 2002 // 2003 2004 2005 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2006 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2007 2008 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2009 const char *name, const char *sig)) 2010 JNIWrapper("GetFieldID"); 2011 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2012 jfieldID ret = 0; 2013 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2014 2015 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2016 2017 // The class should have been loaded (we have an instance of the class 2018 // passed in) so the field and signature should already be in the symbol 2019 // table. If they're not there, the field doesn't exist. 2020 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2021 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2022 if (fieldname == NULL || signame == NULL) { 2023 ResourceMark rm; 2024 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 2025 } 2026 2027 // Make sure class is initialized before handing id's out to fields 2028 k->initialize(CHECK_NULL); 2029 2030 fieldDescriptor fd; 2031 if (!k->is_instance_klass() || 2032 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2033 ResourceMark rm; 2034 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 2035 } 2036 2037 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2038 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2039 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2040 return ret; 2041 JNI_END 2042 2043 2044 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2045 JNIWrapper("GetObjectField"); 2046 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2047 oop o = JNIHandles::resolve_non_null(obj); 2048 Klass* k = o->klass(); 2049 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2050 // Keep JVMTI addition small and only check enabled flag here. 2051 // jni_GetField_probe() assumes that is okay to create handles. 2052 if (JvmtiExport::should_post_field_access()) { 2053 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2054 } 2055 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 2056 jobject ret = JNIHandles::make_local(env, loaded_obj); 2057 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2058 return ret; 2059 JNI_END 2060 2061 2062 2063 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2064 , EntryProbe, ReturnProbe) \ 2065 \ 2066 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2067 , ReturnProbe); \ 2068 \ 2069 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2070 JNIWrapper("Get" XSTR(Result) "Field"); \ 2071 \ 2072 EntryProbe; \ 2073 Return ret = 0;\ 2074 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2075 \ 2076 oop o = JNIHandles::resolve_non_null(obj); \ 2077 Klass* k = o->klass(); \ 2078 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2079 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2080 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2081 /* and creates a ResetNoHandleMark. */ \ 2082 if (JvmtiExport::should_post_field_access()) { \ 2083 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2084 } \ 2085 ret = o->Fieldname##_field(offset); \ 2086 return ret; \ 2087 JNI_END 2088 2089 DEFINE_GETFIELD(jboolean, bool, Boolean 2090 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2091 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2092 DEFINE_GETFIELD(jbyte, byte, Byte 2093 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2094 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2095 DEFINE_GETFIELD(jchar, char, Char 2096 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2097 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2098 DEFINE_GETFIELD(jshort, short, Short 2099 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2100 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2101 DEFINE_GETFIELD(jint, int, Int 2102 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2103 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2104 DEFINE_GETFIELD(jlong, long, Long 2105 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2106 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2107 // Float and double probes don't return value because dtrace doesn't currently support it 2108 DEFINE_GETFIELD(jfloat, float, Float 2109 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2110 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2111 DEFINE_GETFIELD(jdouble, double, Double 2112 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2113 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2114 2115 address jni_GetBooleanField_addr() { 2116 return (address)jni_GetBooleanField; 2117 } 2118 address jni_GetByteField_addr() { 2119 return (address)jni_GetByteField; 2120 } 2121 address jni_GetCharField_addr() { 2122 return (address)jni_GetCharField; 2123 } 2124 address jni_GetShortField_addr() { 2125 return (address)jni_GetShortField; 2126 } 2127 address jni_GetIntField_addr() { 2128 return (address)jni_GetIntField; 2129 } 2130 address jni_GetLongField_addr() { 2131 return (address)jni_GetLongField; 2132 } 2133 address jni_GetFloatField_addr() { 2134 return (address)jni_GetFloatField; 2135 } 2136 address jni_GetDoubleField_addr() { 2137 return (address)jni_GetDoubleField; 2138 } 2139 2140 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2141 JNIWrapper("SetObjectField"); 2142 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2143 oop o = JNIHandles::resolve_non_null(obj); 2144 Klass* k = o->klass(); 2145 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2146 // Keep JVMTI addition small and only check enabled flag here. 2147 // jni_SetField_probe_nh() assumes that is not okay to create handles 2148 // and creates a ResetNoHandleMark. 2149 if (JvmtiExport::should_post_field_modification()) { 2150 jvalue field_value; 2151 field_value.l = value; 2152 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2153 } 2154 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2155 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2156 JNI_END 2157 2158 2159 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2160 , EntryProbe, ReturnProbe) \ 2161 \ 2162 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2163 JNIWrapper("Set" XSTR(Result) "Field"); \ 2164 \ 2165 EntryProbe; \ 2166 \ 2167 oop o = JNIHandles::resolve_non_null(obj); \ 2168 Klass* k = o->klass(); \ 2169 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2170 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2171 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2172 /* and creates a ResetNoHandleMark. */ \ 2173 if (JvmtiExport::should_post_field_modification()) { \ 2174 jvalue field_value; \ 2175 field_value.unionType = value; \ 2176 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2177 } \ 2178 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2179 o->Fieldname##_field_put(offset, value); \ 2180 ReturnProbe; \ 2181 JNI_END 2182 2183 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2184 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2185 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2186 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2187 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2188 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2189 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2190 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2191 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2192 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2193 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2194 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2195 DEFINE_SETFIELD(jint, int, Int, 'I', i 2196 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2197 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2198 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2199 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2200 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2201 // Float and double probes don't return value because dtrace doesn't currently support it 2202 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2203 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2204 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2205 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2206 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2207 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2208 2209 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2210 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2211 2212 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2213 JNIWrapper("ToReflectedField"); 2214 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2215 jobject ret = NULL; 2216 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2217 2218 fieldDescriptor fd; 2219 bool found = false; 2220 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2221 2222 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2223 2224 if (isStatic) { 2225 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2226 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2227 assert(id->is_static_field_id(), "invalid static field id"); 2228 found = id->find_local_field(&fd); 2229 } else { 2230 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2231 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2232 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2233 } 2234 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2235 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2236 ret = JNIHandles::make_local(env, reflected); 2237 return ret; 2238 JNI_END 2239 2240 2241 // 2242 // Accessing Static Fields 2243 // 2244 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2245 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2246 2247 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2248 const char *name, const char *sig)) 2249 JNIWrapper("GetStaticFieldID"); 2250 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2251 jfieldID ret = NULL; 2252 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2253 2254 // The class should have been loaded (we have an instance of the class 2255 // passed in) so the field and signature should already be in the symbol 2256 // table. If they're not there, the field doesn't exist. 2257 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2258 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2259 if (fieldname == NULL || signame == NULL) { 2260 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2261 } 2262 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2263 // Make sure class is initialized before handing id's out to static fields 2264 k->initialize(CHECK_NULL); 2265 2266 fieldDescriptor fd; 2267 if (!k->is_instance_klass() || 2268 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2269 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2270 } 2271 2272 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2273 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2274 debug_only(id->set_is_static_field_id();) 2275 2276 debug_only(id->verify(fd.field_holder())); 2277 2278 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2279 return ret; 2280 JNI_END 2281 2282 2283 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2284 JNIWrapper("GetStaticObjectField"); 2285 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2286 #if INCLUDE_JNI_CHECK 2287 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2288 #endif // INCLUDE_JNI_CHECK 2289 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2290 assert(id->is_static_field_id(), "invalid static field id"); 2291 // Keep JVMTI addition small and only check enabled flag here. 2292 // jni_GetField_probe() assumes that is okay to create handles. 2293 if (JvmtiExport::should_post_field_access()) { 2294 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2295 } 2296 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2297 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2298 return ret; 2299 JNI_END 2300 2301 2302 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2303 , EntryProbe, ReturnProbe) \ 2304 \ 2305 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2306 , ReturnProbe); \ 2307 \ 2308 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2309 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2310 EntryProbe; \ 2311 Return ret = 0;\ 2312 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2313 (const Return&)ret);\ 2314 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2315 assert(id->is_static_field_id(), "invalid static field id"); \ 2316 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2317 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2318 if (JvmtiExport::should_post_field_access()) { \ 2319 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2320 } \ 2321 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2322 return ret;\ 2323 JNI_END 2324 2325 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2326 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2327 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2328 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2329 DEFINE_GETSTATICFIELD(jchar, char, Char 2330 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2331 DEFINE_GETSTATICFIELD(jshort, short, Short 2332 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2333 DEFINE_GETSTATICFIELD(jint, int, Int 2334 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2335 DEFINE_GETSTATICFIELD(jlong, long, Long 2336 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2337 // Float and double probes don't return value because dtrace doesn't currently support it 2338 DEFINE_GETSTATICFIELD(jfloat, float, Float 2339 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2340 DEFINE_GETSTATICFIELD(jdouble, double, Double 2341 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2342 2343 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2344 JNIWrapper("SetStaticObjectField"); 2345 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2346 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2347 assert(id->is_static_field_id(), "invalid static field id"); 2348 // Keep JVMTI addition small and only check enabled flag here. 2349 // jni_SetField_probe() assumes that is okay to create handles. 2350 if (JvmtiExport::should_post_field_modification()) { 2351 jvalue field_value; 2352 field_value.l = value; 2353 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2354 } 2355 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2356 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2357 JNI_END 2358 2359 2360 2361 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2362 , EntryProbe, ReturnProbe) \ 2363 \ 2364 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2365 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2366 EntryProbe; \ 2367 \ 2368 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2369 assert(id->is_static_field_id(), "invalid static field id"); \ 2370 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2371 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2372 if (JvmtiExport::should_post_field_modification()) { \ 2373 jvalue field_value; \ 2374 field_value.unionType = value; \ 2375 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2376 } \ 2377 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2378 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2379 ReturnProbe;\ 2380 JNI_END 2381 2382 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2383 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2384 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2385 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2386 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2387 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2388 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2389 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2390 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2391 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2392 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2393 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2394 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2395 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2396 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2397 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2398 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2399 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2400 // Float and double probes don't return value because dtrace doesn't currently support it 2401 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2402 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2403 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2404 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2405 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2406 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2407 2408 // 2409 // String Operations 2410 // 2411 2412 // Unicode Interface 2413 2414 DT_RETURN_MARK_DECL(NewString, jstring 2415 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2416 2417 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2418 JNIWrapper("NewString"); 2419 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2420 jstring ret = NULL; 2421 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2422 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2423 ret = (jstring) JNIHandles::make_local(env, string); 2424 return ret; 2425 JNI_END 2426 2427 2428 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2429 JNIWrapper("GetStringLength"); 2430 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2431 jsize ret = 0; 2432 oop s = JNIHandles::resolve_non_null(string); 2433 ret = java_lang_String::length(s); 2434 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2435 return ret; 2436 JNI_END 2437 2438 2439 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2440 JNIEnv *env, jstring string, jboolean *isCopy)) 2441 JNIWrapper("GetStringChars"); 2442 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2443 jchar* buf = NULL; 2444 oop s = JNIHandles::resolve_non_null(string); 2445 typeArrayOop s_value = java_lang_String::value(s); 2446 if (s_value != NULL) { 2447 int s_len = java_lang_String::length(s, s_value); 2448 bool is_latin1 = java_lang_String::is_latin1(s); 2449 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2450 /* JNI Specification states return NULL on OOM */ 2451 if (buf != NULL) { 2452 if (s_len > 0) { 2453 if (!is_latin1) { 2454 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2455 buf, s_len); 2456 } else { 2457 for (int i = 0; i < s_len; i++) { 2458 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2459 } 2460 } 2461 } 2462 buf[s_len] = 0; 2463 //%note jni_5 2464 if (isCopy != NULL) { 2465 *isCopy = JNI_TRUE; 2466 } 2467 } 2468 } 2469 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2470 return buf; 2471 JNI_END 2472 2473 2474 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2475 JNIWrapper("ReleaseStringChars"); 2476 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2477 //%note jni_6 2478 if (chars != NULL) { 2479 // Since String objects are supposed to be immutable, don't copy any 2480 // new data back. A bad user will have to go after the char array. 2481 FreeHeap((void*) chars); 2482 } 2483 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2484 JNI_END 2485 2486 2487 // UTF Interface 2488 2489 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2490 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2491 2492 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2493 JNIWrapper("NewStringUTF"); 2494 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2495 jstring ret; 2496 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2497 2498 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2499 ret = (jstring) JNIHandles::make_local(env, result); 2500 return ret; 2501 JNI_END 2502 2503 2504 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2505 JNIWrapper("GetStringUTFLength"); 2506 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2507 oop java_string = JNIHandles::resolve_non_null(string); 2508 jsize ret = java_lang_String::utf8_length(java_string); 2509 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2510 return ret; 2511 JNI_END 2512 2513 2514 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2515 JNIWrapper("GetStringUTFChars"); 2516 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2517 char* result = NULL; 2518 oop java_string = JNIHandles::resolve_non_null(string); 2519 typeArrayOop s_value = java_lang_String::value(java_string); 2520 if (s_value != NULL) { 2521 size_t length = java_lang_String::utf8_length(java_string, s_value); 2522 /* JNI Specification states return NULL on OOM */ 2523 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2524 if (result != NULL) { 2525 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2526 if (isCopy != NULL) { 2527 *isCopy = JNI_TRUE; 2528 } 2529 } 2530 } 2531 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2532 return result; 2533 JNI_END 2534 2535 2536 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2537 JNIWrapper("ReleaseStringUTFChars"); 2538 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2539 if (chars != NULL) { 2540 FreeHeap((char*) chars); 2541 } 2542 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2543 JNI_END 2544 2545 2546 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2547 JNIWrapper("GetArrayLength"); 2548 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2549 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2550 assert(a->is_array(), "must be array"); 2551 jsize ret = a->length(); 2552 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2553 return ret; 2554 JNI_END 2555 2556 2557 // 2558 // Object Array Operations 2559 // 2560 2561 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2562 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2563 2564 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2565 JNIWrapper("NewObjectArray"); 2566 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2567 jobjectArray ret = NULL; 2568 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2569 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2570 Klass* ak = ek->array_klass(CHECK_NULL); 2571 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2572 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2573 oop initial_value = JNIHandles::resolve(initialElement); 2574 if (initial_value != NULL) { // array already initialized with NULL 2575 for (int index = 0; index < length; index++) { 2576 result->obj_at_put(index, initial_value); 2577 } 2578 } 2579 ret = (jobjectArray) JNIHandles::make_local(env, result); 2580 return ret; 2581 JNI_END 2582 2583 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2584 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2585 2586 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2587 JNIWrapper("GetObjectArrayElement"); 2588 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2589 jobject ret = NULL; 2590 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2591 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2592 if (a->is_within_bounds(index)) { 2593 ret = JNIHandles::make_local(env, a->obj_at(index)); 2594 return ret; 2595 } else { 2596 ResourceMark rm(THREAD); 2597 stringStream ss; 2598 ss.print("Index %d out of bounds for length %d", index, a->length()); 2599 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2600 } 2601 JNI_END 2602 2603 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2604 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2605 2606 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2607 JNIWrapper("SetObjectArrayElement"); 2608 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2609 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2610 2611 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2612 oop v = JNIHandles::resolve(value); 2613 if (a->is_within_bounds(index)) { 2614 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2615 a->obj_at_put(index, v); 2616 } else { 2617 ResourceMark rm(THREAD); 2618 stringStream ss; 2619 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2620 ss.print("type mismatch: can not store %s to %s[%d]", 2621 v->klass()->external_name(), 2622 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2623 index); 2624 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2625 ss.print("[]"); 2626 } 2627 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2628 } 2629 } else { 2630 ResourceMark rm(THREAD); 2631 stringStream ss; 2632 ss.print("Index %d out of bounds for length %d", index, a->length()); 2633 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2634 } 2635 JNI_END 2636 2637 2638 2639 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2640 ,EntryProbe,ReturnProbe) \ 2641 \ 2642 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2643 , ReturnProbe); \ 2644 \ 2645 JNI_ENTRY(Return, \ 2646 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2647 JNIWrapper("New" XSTR(Result) "Array"); \ 2648 EntryProbe; \ 2649 Return ret = NULL;\ 2650 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2651 \ 2652 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2653 ret = (Return) JNIHandles::make_local(env, obj); \ 2654 return ret;\ 2655 JNI_END 2656 2657 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2658 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2659 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2660 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2661 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2662 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2663 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2664 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2665 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2666 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2667 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2668 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2669 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2670 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2671 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2672 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2673 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2674 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2675 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2676 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2677 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2678 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2679 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2680 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2681 2682 // Return an address which will fault if the caller writes to it. 2683 2684 static char* get_bad_address() { 2685 static char* bad_address = NULL; 2686 if (bad_address == NULL) { 2687 size_t size = os::vm_allocation_granularity(); 2688 bad_address = os::reserve_memory(size); 2689 if (bad_address != NULL) { 2690 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2691 /*is_committed*/false); 2692 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2693 } 2694 } 2695 return bad_address; 2696 } 2697 2698 2699 2700 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2701 , EntryProbe, ReturnProbe) \ 2702 \ 2703 JNI_QUICK_ENTRY(ElementType*, \ 2704 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2705 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2706 EntryProbe; \ 2707 /* allocate an chunk of memory in c land */ \ 2708 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2709 ElementType* result; \ 2710 int len = a->length(); \ 2711 if (len == 0) { \ 2712 if (isCopy != NULL) { \ 2713 *isCopy = JNI_FALSE; \ 2714 } \ 2715 /* Empty array: legal but useless, can't return NULL. \ 2716 * Return a pointer to something useless. \ 2717 * Avoid asserts in typeArrayOop. */ \ 2718 result = (ElementType*)get_bad_address(); \ 2719 } else { \ 2720 /* JNI Specification states return NULL on OOM */ \ 2721 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2722 if (result != NULL) { \ 2723 /* copy the array to the c chunk */ \ 2724 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2725 result, len); \ 2726 if (isCopy) { \ 2727 *isCopy = JNI_TRUE; \ 2728 } \ 2729 } \ 2730 } \ 2731 ReturnProbe; \ 2732 return result; \ 2733 JNI_END 2734 2735 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2736 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2737 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2738 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2739 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2740 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2741 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2742 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2743 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2744 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2745 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2746 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2747 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2748 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2749 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2750 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2751 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2752 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2753 // Float and double probes don't return value because dtrace doesn't currently support it 2754 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2755 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2756 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2757 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2758 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2760 2761 2762 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2763 , EntryProbe, ReturnProbe);\ 2764 \ 2765 JNI_QUICK_ENTRY(void, \ 2766 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2767 ElementType *buf, jint mode)) \ 2768 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2769 EntryProbe; \ 2770 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2771 int len = a->length(); \ 2772 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2773 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2774 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2775 } \ 2776 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2777 FreeHeap(buf); \ 2778 } \ 2779 } \ 2780 ReturnProbe; \ 2781 JNI_END 2782 2783 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2784 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2785 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2786 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2787 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2788 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2790 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2791 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2793 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2794 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2796 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2797 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2799 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2800 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2802 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2803 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2805 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2806 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2807 2808 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2809 ResourceMark rm(THREAD); 2810 if (copy_len < 0) { 2811 stringStream ss; 2812 ss.print("Length %d is negative", copy_len); 2813 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2814 } else if (start < 0 || (start > array_len - copy_len)) { 2815 stringStream ss; 2816 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2817 start, (int64_t)start+(int64_t)copy_len, array_len); 2818 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2819 } 2820 } 2821 2822 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2823 , EntryProbe, ReturnProbe); \ 2824 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2825 , ReturnProbe); \ 2826 \ 2827 JNI_ENTRY(void, \ 2828 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2829 jsize len, ElementType *buf)) \ 2830 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2831 EntryProbe; \ 2832 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2833 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2834 check_bounds(start, len, src->length(), CHECK); \ 2835 if (len > 0) { \ 2836 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2837 } \ 2838 JNI_END 2839 2840 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2841 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2842 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2843 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2844 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2845 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2846 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2847 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2848 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2849 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2850 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2851 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2852 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2853 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2854 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2855 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2856 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2857 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2858 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2859 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2860 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2861 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2862 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2863 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2864 2865 2866 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2867 , EntryProbe, ReturnProbe); \ 2868 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2869 ,ReturnProbe); \ 2870 \ 2871 JNI_ENTRY(void, \ 2872 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2873 jsize len, const ElementType *buf)) \ 2874 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2875 EntryProbe; \ 2876 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2877 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2878 check_bounds(start, len, dst->length(), CHECK); \ 2879 if (len > 0) { \ 2880 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2881 } \ 2882 JNI_END 2883 2884 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2885 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2886 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2887 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2888 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2889 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2890 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2891 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2892 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2893 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2894 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2895 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2896 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2897 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2898 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2899 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2900 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2901 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2902 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2903 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2904 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2905 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2906 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2907 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2908 2909 2910 // 2911 // Interception of natives 2912 // 2913 2914 // The RegisterNatives call being attempted tried to register with a method that 2915 // is not native. Ask JVM TI what prefixes have been specified. Then check 2916 // to see if the native method is now wrapped with the prefixes. See the 2917 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2918 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2919 #if INCLUDE_JVMTI 2920 ResourceMark rm(THREAD); 2921 Method* method; 2922 int name_len = name->utf8_length(); 2923 char* name_str = name->as_utf8(); 2924 int prefix_count; 2925 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2926 for (int i = 0; i < prefix_count; i++) { 2927 char* prefix = prefixes[i]; 2928 int prefix_len = (int)strlen(prefix); 2929 2930 // try adding this prefix to the method name and see if it matches another method name 2931 int trial_len = name_len + prefix_len; 2932 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2933 strcpy(trial_name_str, prefix); 2934 strcat(trial_name_str, name_str); 2935 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2936 if (trial_name == NULL) { 2937 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2938 } 2939 method = k->lookup_method(trial_name, signature); 2940 if (method == NULL) { 2941 continue; // signature doesn't match, try the next prefix 2942 } 2943 if (method->is_native()) { 2944 method->set_is_prefixed_native(); 2945 return method; // wahoo, we found a prefixed version of the method, return it 2946 } 2947 // found as non-native, so prefix is good, add it, probably just need more prefixes 2948 name_len = trial_len; 2949 name_str = trial_name_str; 2950 } 2951 #endif // INCLUDE_JVMTI 2952 return NULL; // not found 2953 } 2954 2955 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2956 Method* method = k->lookup_method(name, signature); 2957 if (method == NULL) { 2958 ResourceMark rm; 2959 stringStream st; 2960 st.print("Method '"); 2961 Method::print_external_name(&st, k, name, signature); 2962 st.print("' name or signature does not match"); 2963 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2964 } 2965 if (!method->is_native()) { 2966 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2967 method = find_prefixed_native(k, name, signature, THREAD); 2968 if (method == NULL) { 2969 ResourceMark rm; 2970 stringStream st; 2971 st.print("Method '"); 2972 Method::print_external_name(&st, k, name, signature); 2973 st.print("' is not declared as native"); 2974 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2975 } 2976 } 2977 2978 if (entry != NULL) { 2979 method->set_native_function(entry, 2980 Method::native_bind_event_is_interesting); 2981 } else { 2982 method->clear_native_function(); 2983 } 2984 if (PrintJNIResolving) { 2985 ResourceMark rm(THREAD); 2986 tty->print_cr("[Registering JNI native method %s.%s]", 2987 method->method_holder()->external_name(), 2988 method->name()->as_C_string()); 2989 } 2990 return true; 2991 } 2992 2993 DT_RETURN_MARK_DECL(RegisterNatives, jint 2994 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2995 2996 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2997 const JNINativeMethod *methods, 2998 jint nMethods)) 2999 JNIWrapper("RegisterNatives"); 3000 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3001 jint ret = 0; 3002 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3003 3004 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3005 3006 for (int index = 0; index < nMethods; index++) { 3007 const char* meth_name = methods[index].name; 3008 const char* meth_sig = methods[index].signature; 3009 int meth_name_len = (int)strlen(meth_name); 3010 3011 // The class should have been loaded (we have an instance of the class 3012 // passed in) so the method and signature should already be in the symbol 3013 // table. If they're not there, the method doesn't exist. 3014 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3015 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3016 3017 if (name == NULL || signature == NULL) { 3018 ResourceMark rm; 3019 stringStream st; 3020 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3021 // Must return negative value on failure 3022 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3023 } 3024 3025 bool res = register_native(k, name, signature, 3026 (address) methods[index].fnPtr, THREAD); 3027 if (!res) { 3028 ret = -1; 3029 break; 3030 } 3031 } 3032 return ret; 3033 JNI_END 3034 3035 3036 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3037 JNIWrapper("UnregisterNatives"); 3038 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3039 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3040 //%note jni_2 3041 if (k->is_instance_klass()) { 3042 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3043 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3044 if (m->is_native()) { 3045 m->clear_native_function(); 3046 m->set_signature_handler(NULL); 3047 } 3048 } 3049 } 3050 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3051 return 0; 3052 JNI_END 3053 3054 // 3055 // Monitor functions 3056 // 3057 3058 DT_RETURN_MARK_DECL(MonitorEnter, jint 3059 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3060 3061 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3062 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3063 jint ret = JNI_ERR; 3064 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3065 3066 // If the object is null, we can't do anything with it 3067 if (jobj == NULL) { 3068 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3069 } 3070 3071 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3072 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3073 ret = JNI_OK; 3074 return ret; 3075 JNI_END 3076 3077 DT_RETURN_MARK_DECL(MonitorExit, jint 3078 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3079 3080 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3081 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3082 jint ret = JNI_ERR; 3083 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3084 3085 // Don't do anything with a null object 3086 if (jobj == NULL) { 3087 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3088 } 3089 3090 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3091 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3092 3093 ret = JNI_OK; 3094 return ret; 3095 JNI_END 3096 3097 // 3098 // Extensions 3099 // 3100 3101 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3102 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3103 3104 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3105 JNIWrapper("GetStringRegion"); 3106 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3107 DT_VOID_RETURN_MARK(GetStringRegion); 3108 oop s = JNIHandles::resolve_non_null(string); 3109 typeArrayOop s_value = java_lang_String::value(s); 3110 int s_len = java_lang_String::length(s, s_value); 3111 if (start < 0 || len < 0 || start > s_len - len) { 3112 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3113 } else { 3114 if (len > 0) { 3115 bool is_latin1 = java_lang_String::is_latin1(s); 3116 if (!is_latin1) { 3117 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 3118 buf, len); 3119 } else { 3120 for (int i = 0; i < len; i++) { 3121 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3122 } 3123 } 3124 } 3125 } 3126 JNI_END 3127 3128 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3129 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3130 3131 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3132 JNIWrapper("GetStringUTFRegion"); 3133 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3134 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3135 oop s = JNIHandles::resolve_non_null(string); 3136 typeArrayOop s_value = java_lang_String::value(s); 3137 int s_len = java_lang_String::length(s, s_value); 3138 if (start < 0 || len < 0 || start > s_len - len) { 3139 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3140 } else { 3141 //%note jni_7 3142 if (len > 0) { 3143 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3144 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 3145 // as_utf8_string null-terminates the result string 3146 } else { 3147 // JDK null-terminates the buffer even in len is zero 3148 if (buf != NULL) { 3149 buf[0] = 0; 3150 } 3151 } 3152 } 3153 JNI_END 3154 3155 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 3156 if (Universe::heap()->supports_object_pinning()) { 3157 const oop o = JNIHandles::resolve_non_null(obj); 3158 return Universe::heap()->pin_object(thread, o); 3159 } else { 3160 GCLocker::lock_critical(thread); 3161 return JNIHandles::resolve_non_null(obj); 3162 } 3163 } 3164 3165 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 3166 if (Universe::heap()->supports_object_pinning()) { 3167 const oop o = JNIHandles::resolve_non_null(obj); 3168 return Universe::heap()->unpin_object(thread, o); 3169 } else { 3170 GCLocker::unlock_critical(thread); 3171 } 3172 } 3173 3174 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3175 JNIWrapper("GetPrimitiveArrayCritical"); 3176 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3177 if (isCopy != NULL) { 3178 *isCopy = JNI_FALSE; 3179 } 3180 oop a = lock_gc_or_pin_object(thread, array); 3181 assert(a->is_array(), "just checking"); 3182 BasicType type; 3183 if (a->is_objArray()) { 3184 type = T_OBJECT; 3185 } else { 3186 type = TypeArrayKlass::cast(a->klass())->element_type(); 3187 } 3188 void* ret = arrayOop(a)->base(type); 3189 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3190 return ret; 3191 JNI_END 3192 3193 3194 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3195 JNIWrapper("ReleasePrimitiveArrayCritical"); 3196 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3197 unlock_gc_or_unpin_object(thread, array); 3198 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3199 JNI_END 3200 3201 3202 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3203 JNIWrapper("GetStringCritical"); 3204 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3205 oop s = lock_gc_or_pin_object(thread, string); 3206 typeArrayOop s_value = java_lang_String::value(s); 3207 bool is_latin1 = java_lang_String::is_latin1(s); 3208 if (isCopy != NULL) { 3209 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3210 } 3211 jchar* ret; 3212 if (!is_latin1) { 3213 ret = (jchar*) s_value->base(T_CHAR); 3214 } else { 3215 // Inflate latin1 encoded string to UTF16 3216 int s_len = java_lang_String::length(s, s_value); 3217 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3218 /* JNI Specification states return NULL on OOM */ 3219 if (ret != NULL) { 3220 for (int i = 0; i < s_len; i++) { 3221 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3222 } 3223 ret[s_len] = 0; 3224 } 3225 } 3226 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3227 return ret; 3228 JNI_END 3229 3230 3231 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3232 JNIWrapper("ReleaseStringCritical"); 3233 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3234 // The str and chars arguments are ignored for UTF16 strings 3235 oop s = JNIHandles::resolve_non_null(str); 3236 bool is_latin1 = java_lang_String::is_latin1(s); 3237 if (is_latin1) { 3238 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3239 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3240 FREE_C_HEAP_ARRAY(jchar, chars); 3241 } 3242 unlock_gc_or_unpin_object(thread, str); 3243 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3244 JNI_END 3245 3246 3247 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3248 JNIWrapper("jni_NewWeakGlobalRef"); 3249 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3250 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3251 jweak ret = JNIHandles::make_weak_global(ref_handle); 3252 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3253 return ret; 3254 JNI_END 3255 3256 // Must be JNI_ENTRY (with HandleMark) 3257 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3258 JNIWrapper("jni_DeleteWeakGlobalRef"); 3259 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3260 JNIHandles::destroy_weak_global(ref); 3261 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3262 JNI_END 3263 3264 3265 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3266 JNIWrapper("jni_ExceptionCheck"); 3267 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3268 jni_check_async_exceptions(thread); 3269 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3270 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3271 return ret; 3272 JNI_END 3273 3274 3275 // Initialization state for three routines below relating to 3276 // java.nio.DirectBuffers 3277 static int directBufferSupportInitializeStarted = 0; 3278 static volatile int directBufferSupportInitializeEnded = 0; 3279 static volatile int directBufferSupportInitializeFailed = 0; 3280 static jclass bufferClass = NULL; 3281 static jclass directBufferClass = NULL; 3282 static jclass directByteBufferClass = NULL; 3283 static jmethodID directByteBufferConstructor = NULL; 3284 static jfieldID directBufferAddressField = NULL; 3285 static jfieldID bufferCapacityField = NULL; 3286 3287 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3288 Handle loader; // null (bootstrap) loader 3289 Handle protection_domain; // null protection domain 3290 3291 TempNewSymbol sym = SymbolTable::new_symbol(name); 3292 jclass result = find_class_from_class_loader(env, sym, true, true, loader, protection_domain, true, CHECK_NULL); 3293 3294 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3295 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3296 } 3297 return result; 3298 } 3299 3300 // These lookups are done with the NULL (bootstrap) ClassLoader to 3301 // circumvent any security checks that would be done by jni_FindClass. 3302 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3303 { 3304 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3305 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3306 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3307 return true; 3308 } 3309 JNI_END 3310 3311 3312 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3313 if (directBufferSupportInitializeFailed) { 3314 return false; 3315 } 3316 3317 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3318 if (!lookupDirectBufferClasses(env)) { 3319 directBufferSupportInitializeFailed = 1; 3320 return false; 3321 } 3322 3323 // Make global references for these 3324 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3325 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3326 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3327 3328 // Get needed field and method IDs 3329 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3330 if (env->ExceptionCheck()) { 3331 env->ExceptionClear(); 3332 directBufferSupportInitializeFailed = 1; 3333 return false; 3334 } 3335 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3336 if (env->ExceptionCheck()) { 3337 env->ExceptionClear(); 3338 directBufferSupportInitializeFailed = 1; 3339 return false; 3340 } 3341 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3342 if (env->ExceptionCheck()) { 3343 env->ExceptionClear(); 3344 directBufferSupportInitializeFailed = 1; 3345 return false; 3346 } 3347 3348 if ((directByteBufferConstructor == NULL) || 3349 (directBufferAddressField == NULL) || 3350 (bufferCapacityField == NULL)) { 3351 directBufferSupportInitializeFailed = 1; 3352 return false; 3353 } 3354 3355 directBufferSupportInitializeEnded = 1; 3356 } else { 3357 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3358 os::naked_yield(); 3359 } 3360 } 3361 3362 return !directBufferSupportInitializeFailed; 3363 } 3364 3365 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3366 { 3367 // thread_from_jni_environment() will block if VM is gone. 3368 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3369 3370 JNIWrapper("jni_NewDirectByteBuffer"); 3371 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3372 3373 if (!directBufferSupportInitializeEnded) { 3374 if (!initializeDirectBufferSupport(env, thread)) { 3375 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3376 return NULL; 3377 } 3378 } 3379 3380 // Being paranoid about accidental sign extension on address 3381 jlong addr = (jlong) ((uintptr_t) address); 3382 // NOTE that package-private DirectByteBuffer constructor currently 3383 // takes int capacity 3384 jint cap = (jint) capacity; 3385 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3386 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3387 return ret; 3388 } 3389 3390 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3391 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3392 3393 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3394 { 3395 // thread_from_jni_environment() will block if VM is gone. 3396 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3397 3398 JNIWrapper("jni_GetDirectBufferAddress"); 3399 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3400 void* ret = NULL; 3401 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3402 3403 if (!directBufferSupportInitializeEnded) { 3404 if (!initializeDirectBufferSupport(env, thread)) { 3405 return 0; 3406 } 3407 } 3408 3409 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3410 return 0; 3411 } 3412 3413 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3414 return ret; 3415 } 3416 3417 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3418 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3419 3420 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3421 { 3422 // thread_from_jni_environment() will block if VM is gone. 3423 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3424 3425 JNIWrapper("jni_GetDirectBufferCapacity"); 3426 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3427 jlong ret = -1; 3428 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3429 3430 if (!directBufferSupportInitializeEnded) { 3431 if (!initializeDirectBufferSupport(env, thread)) { 3432 ret = 0; 3433 return ret; 3434 } 3435 } 3436 3437 if (buf == NULL) { 3438 return -1; 3439 } 3440 3441 if (!env->IsInstanceOf(buf, directBufferClass)) { 3442 return -1; 3443 } 3444 3445 // NOTE that capacity is currently an int in the implementation 3446 ret = env->GetIntField(buf, bufferCapacityField); 3447 return ret; 3448 } 3449 3450 3451 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3452 JNIWrapper("GetVersion"); 3453 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3454 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3455 return CurrentVersion; 3456 JNI_END 3457 3458 extern struct JavaVM_ main_vm; 3459 3460 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3461 JNIWrapper("jni_GetJavaVM"); 3462 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3463 *vm = (JavaVM *)(&main_vm); 3464 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3465 return JNI_OK; 3466 JNI_END 3467 3468 3469 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3470 JNIWrapper("GetModule"); 3471 return Modules::get_module(clazz, THREAD); 3472 JNI_END 3473 3474 3475 // Structure containing all jni functions 3476 struct JNINativeInterface_ jni_NativeInterface = { 3477 NULL, 3478 NULL, 3479 NULL, 3480 3481 NULL, 3482 3483 jni_GetVersion, 3484 3485 jni_DefineClass, 3486 jni_FindClass, 3487 3488 jni_FromReflectedMethod, 3489 jni_FromReflectedField, 3490 3491 jni_ToReflectedMethod, 3492 3493 jni_GetSuperclass, 3494 jni_IsAssignableFrom, 3495 3496 jni_ToReflectedField, 3497 3498 jni_Throw, 3499 jni_ThrowNew, 3500 jni_ExceptionOccurred, 3501 jni_ExceptionDescribe, 3502 jni_ExceptionClear, 3503 jni_FatalError, 3504 3505 jni_PushLocalFrame, 3506 jni_PopLocalFrame, 3507 3508 jni_NewGlobalRef, 3509 jni_DeleteGlobalRef, 3510 jni_DeleteLocalRef, 3511 jni_IsSameObject, 3512 3513 jni_NewLocalRef, 3514 jni_EnsureLocalCapacity, 3515 3516 jni_AllocObject, 3517 jni_NewObject, 3518 jni_NewObjectV, 3519 jni_NewObjectA, 3520 3521 jni_GetObjectClass, 3522 jni_IsInstanceOf, 3523 3524 jni_GetMethodID, 3525 3526 jni_CallObjectMethod, 3527 jni_CallObjectMethodV, 3528 jni_CallObjectMethodA, 3529 jni_CallBooleanMethod, 3530 jni_CallBooleanMethodV, 3531 jni_CallBooleanMethodA, 3532 jni_CallByteMethod, 3533 jni_CallByteMethodV, 3534 jni_CallByteMethodA, 3535 jni_CallCharMethod, 3536 jni_CallCharMethodV, 3537 jni_CallCharMethodA, 3538 jni_CallShortMethod, 3539 jni_CallShortMethodV, 3540 jni_CallShortMethodA, 3541 jni_CallIntMethod, 3542 jni_CallIntMethodV, 3543 jni_CallIntMethodA, 3544 jni_CallLongMethod, 3545 jni_CallLongMethodV, 3546 jni_CallLongMethodA, 3547 jni_CallFloatMethod, 3548 jni_CallFloatMethodV, 3549 jni_CallFloatMethodA, 3550 jni_CallDoubleMethod, 3551 jni_CallDoubleMethodV, 3552 jni_CallDoubleMethodA, 3553 jni_CallVoidMethod, 3554 jni_CallVoidMethodV, 3555 jni_CallVoidMethodA, 3556 3557 jni_CallNonvirtualObjectMethod, 3558 jni_CallNonvirtualObjectMethodV, 3559 jni_CallNonvirtualObjectMethodA, 3560 jni_CallNonvirtualBooleanMethod, 3561 jni_CallNonvirtualBooleanMethodV, 3562 jni_CallNonvirtualBooleanMethodA, 3563 jni_CallNonvirtualByteMethod, 3564 jni_CallNonvirtualByteMethodV, 3565 jni_CallNonvirtualByteMethodA, 3566 jni_CallNonvirtualCharMethod, 3567 jni_CallNonvirtualCharMethodV, 3568 jni_CallNonvirtualCharMethodA, 3569 jni_CallNonvirtualShortMethod, 3570 jni_CallNonvirtualShortMethodV, 3571 jni_CallNonvirtualShortMethodA, 3572 jni_CallNonvirtualIntMethod, 3573 jni_CallNonvirtualIntMethodV, 3574 jni_CallNonvirtualIntMethodA, 3575 jni_CallNonvirtualLongMethod, 3576 jni_CallNonvirtualLongMethodV, 3577 jni_CallNonvirtualLongMethodA, 3578 jni_CallNonvirtualFloatMethod, 3579 jni_CallNonvirtualFloatMethodV, 3580 jni_CallNonvirtualFloatMethodA, 3581 jni_CallNonvirtualDoubleMethod, 3582 jni_CallNonvirtualDoubleMethodV, 3583 jni_CallNonvirtualDoubleMethodA, 3584 jni_CallNonvirtualVoidMethod, 3585 jni_CallNonvirtualVoidMethodV, 3586 jni_CallNonvirtualVoidMethodA, 3587 3588 jni_GetFieldID, 3589 3590 jni_GetObjectField, 3591 jni_GetBooleanField, 3592 jni_GetByteField, 3593 jni_GetCharField, 3594 jni_GetShortField, 3595 jni_GetIntField, 3596 jni_GetLongField, 3597 jni_GetFloatField, 3598 jni_GetDoubleField, 3599 3600 jni_SetObjectField, 3601 jni_SetBooleanField, 3602 jni_SetByteField, 3603 jni_SetCharField, 3604 jni_SetShortField, 3605 jni_SetIntField, 3606 jni_SetLongField, 3607 jni_SetFloatField, 3608 jni_SetDoubleField, 3609 3610 jni_GetStaticMethodID, 3611 3612 jni_CallStaticObjectMethod, 3613 jni_CallStaticObjectMethodV, 3614 jni_CallStaticObjectMethodA, 3615 jni_CallStaticBooleanMethod, 3616 jni_CallStaticBooleanMethodV, 3617 jni_CallStaticBooleanMethodA, 3618 jni_CallStaticByteMethod, 3619 jni_CallStaticByteMethodV, 3620 jni_CallStaticByteMethodA, 3621 jni_CallStaticCharMethod, 3622 jni_CallStaticCharMethodV, 3623 jni_CallStaticCharMethodA, 3624 jni_CallStaticShortMethod, 3625 jni_CallStaticShortMethodV, 3626 jni_CallStaticShortMethodA, 3627 jni_CallStaticIntMethod, 3628 jni_CallStaticIntMethodV, 3629 jni_CallStaticIntMethodA, 3630 jni_CallStaticLongMethod, 3631 jni_CallStaticLongMethodV, 3632 jni_CallStaticLongMethodA, 3633 jni_CallStaticFloatMethod, 3634 jni_CallStaticFloatMethodV, 3635 jni_CallStaticFloatMethodA, 3636 jni_CallStaticDoubleMethod, 3637 jni_CallStaticDoubleMethodV, 3638 jni_CallStaticDoubleMethodA, 3639 jni_CallStaticVoidMethod, 3640 jni_CallStaticVoidMethodV, 3641 jni_CallStaticVoidMethodA, 3642 3643 jni_GetStaticFieldID, 3644 3645 jni_GetStaticObjectField, 3646 jni_GetStaticBooleanField, 3647 jni_GetStaticByteField, 3648 jni_GetStaticCharField, 3649 jni_GetStaticShortField, 3650 jni_GetStaticIntField, 3651 jni_GetStaticLongField, 3652 jni_GetStaticFloatField, 3653 jni_GetStaticDoubleField, 3654 3655 jni_SetStaticObjectField, 3656 jni_SetStaticBooleanField, 3657 jni_SetStaticByteField, 3658 jni_SetStaticCharField, 3659 jni_SetStaticShortField, 3660 jni_SetStaticIntField, 3661 jni_SetStaticLongField, 3662 jni_SetStaticFloatField, 3663 jni_SetStaticDoubleField, 3664 3665 jni_NewString, 3666 jni_GetStringLength, 3667 jni_GetStringChars, 3668 jni_ReleaseStringChars, 3669 3670 jni_NewStringUTF, 3671 jni_GetStringUTFLength, 3672 jni_GetStringUTFChars, 3673 jni_ReleaseStringUTFChars, 3674 3675 jni_GetArrayLength, 3676 3677 jni_NewObjectArray, 3678 jni_GetObjectArrayElement, 3679 jni_SetObjectArrayElement, 3680 3681 jni_NewBooleanArray, 3682 jni_NewByteArray, 3683 jni_NewCharArray, 3684 jni_NewShortArray, 3685 jni_NewIntArray, 3686 jni_NewLongArray, 3687 jni_NewFloatArray, 3688 jni_NewDoubleArray, 3689 3690 jni_GetBooleanArrayElements, 3691 jni_GetByteArrayElements, 3692 jni_GetCharArrayElements, 3693 jni_GetShortArrayElements, 3694 jni_GetIntArrayElements, 3695 jni_GetLongArrayElements, 3696 jni_GetFloatArrayElements, 3697 jni_GetDoubleArrayElements, 3698 3699 jni_ReleaseBooleanArrayElements, 3700 jni_ReleaseByteArrayElements, 3701 jni_ReleaseCharArrayElements, 3702 jni_ReleaseShortArrayElements, 3703 jni_ReleaseIntArrayElements, 3704 jni_ReleaseLongArrayElements, 3705 jni_ReleaseFloatArrayElements, 3706 jni_ReleaseDoubleArrayElements, 3707 3708 jni_GetBooleanArrayRegion, 3709 jni_GetByteArrayRegion, 3710 jni_GetCharArrayRegion, 3711 jni_GetShortArrayRegion, 3712 jni_GetIntArrayRegion, 3713 jni_GetLongArrayRegion, 3714 jni_GetFloatArrayRegion, 3715 jni_GetDoubleArrayRegion, 3716 3717 jni_SetBooleanArrayRegion, 3718 jni_SetByteArrayRegion, 3719 jni_SetCharArrayRegion, 3720 jni_SetShortArrayRegion, 3721 jni_SetIntArrayRegion, 3722 jni_SetLongArrayRegion, 3723 jni_SetFloatArrayRegion, 3724 jni_SetDoubleArrayRegion, 3725 3726 jni_RegisterNatives, 3727 jni_UnregisterNatives, 3728 3729 jni_MonitorEnter, 3730 jni_MonitorExit, 3731 3732 jni_GetJavaVM, 3733 3734 jni_GetStringRegion, 3735 jni_GetStringUTFRegion, 3736 3737 jni_GetPrimitiveArrayCritical, 3738 jni_ReleasePrimitiveArrayCritical, 3739 3740 jni_GetStringCritical, 3741 jni_ReleaseStringCritical, 3742 3743 jni_NewWeakGlobalRef, 3744 jni_DeleteWeakGlobalRef, 3745 3746 jni_ExceptionCheck, 3747 3748 jni_NewDirectByteBuffer, 3749 jni_GetDirectBufferAddress, 3750 jni_GetDirectBufferCapacity, 3751 3752 // New 1_6 features 3753 3754 jni_GetObjectRefType, 3755 3756 // Module features 3757 3758 jni_GetModule 3759 }; 3760 3761 3762 // For jvmti use to modify jni function table. 3763 // Java threads in native contiues to run until it is transitioned 3764 // to VM at safepoint. Before the transition or before it is blocked 3765 // for safepoint it may access jni function table. VM could crash if 3766 // any java thread access the jni function table in the middle of memcpy. 3767 // To avoid this each function pointers are copied automically. 3768 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3769 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3770 intptr_t *a = (intptr_t *) jni_functions(); 3771 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3772 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3773 Atomic::store(*b++, a++); 3774 } 3775 } 3776 3777 void quicken_jni_functions() { 3778 // Replace Get<Primitive>Field with fast versions 3779 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) { 3780 address func; 3781 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3782 if (func != (address)-1) { 3783 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3784 } 3785 func = JNI_FastGetField::generate_fast_get_byte_field(); 3786 if (func != (address)-1) { 3787 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3788 } 3789 func = JNI_FastGetField::generate_fast_get_char_field(); 3790 if (func != (address)-1) { 3791 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3792 } 3793 func = JNI_FastGetField::generate_fast_get_short_field(); 3794 if (func != (address)-1) { 3795 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3796 } 3797 func = JNI_FastGetField::generate_fast_get_int_field(); 3798 if (func != (address)-1) { 3799 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3800 } 3801 func = JNI_FastGetField::generate_fast_get_long_field(); 3802 if (func != (address)-1) { 3803 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3804 } 3805 func = JNI_FastGetField::generate_fast_get_float_field(); 3806 if (func != (address)-1) { 3807 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3808 } 3809 func = JNI_FastGetField::generate_fast_get_double_field(); 3810 if (func != (address)-1) { 3811 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3812 } 3813 } 3814 } 3815 3816 // Returns the function structure 3817 struct JNINativeInterface_* jni_functions() { 3818 #if INCLUDE_JNI_CHECK 3819 if (CheckJNICalls) return jni_functions_check(); 3820 #endif // INCLUDE_JNI_CHECK 3821 return &jni_NativeInterface; 3822 } 3823 3824 // Returns the function structure 3825 struct JNINativeInterface_* jni_functions_nocheck() { 3826 return &jni_NativeInterface; 3827 } 3828 3829 static void post_thread_start_event(const JavaThread* jt) { 3830 assert(jt != NULL, "invariant"); 3831 EventThreadStart event; 3832 if (event.should_commit()) { 3833 event.set_thread(JFR_THREAD_ID(jt)); 3834 event.commit(); 3835 } 3836 } 3837 3838 // Invocation API 3839 3840 3841 // Forward declaration 3842 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3843 3844 // Global invocation API vars 3845 volatile int vm_created = 0; 3846 // Indicate whether it is safe to recreate VM 3847 volatile int safe_to_recreate_vm = 1; 3848 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3849 3850 3851 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3852 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3853 3854 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3855 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3856 3857 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3858 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3859 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3860 jint ret = JNI_ERR; 3861 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3862 3863 if (Threads::is_supported_jni_version(args->version)) { 3864 ret = JNI_OK; 3865 } 3866 // 1.1 style no longer supported in hotspot. 3867 // According the JNI spec, we should update args->version on return. 3868 // We also use the structure to communicate with launcher about default 3869 // stack size. 3870 if (args->version == JNI_VERSION_1_1) { 3871 args->version = JNI_VERSION_1_2; 3872 // javaStackSize is int in arguments structure 3873 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3874 args->javaStackSize = (jint)(ThreadStackSize * K); 3875 } 3876 return ret; 3877 } 3878 3879 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3880 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3881 3882 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3883 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3884 3885 jint result = JNI_ERR; 3886 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3887 3888 // We're about to use Atomic::xchg for synchronization. Some Zero 3889 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3890 // but __sync_lock_test_and_set is not guaranteed to do what we want 3891 // on all architectures. So we check it works before relying on it. 3892 #if defined(ZERO) && defined(ASSERT) 3893 { 3894 jint a = 0xcafebabe; 3895 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3896 void *c = &a; 3897 void *d = Atomic::xchg(&b, &c); 3898 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3899 assert(c == &b && d == &a, "Atomic::xchg() works"); 3900 } 3901 #endif // ZERO && ASSERT 3902 3903 // At the moment it's only possible to have one Java VM, 3904 // since some of the runtime state is in global variables. 3905 3906 // We cannot use our mutex locks here, since they only work on 3907 // Threads. We do an atomic compare and exchange to ensure only 3908 // one thread can call this method at a time 3909 3910 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3911 // the add/dec implementations are dependent on whether we are running 3912 // on a multiprocessor Atomic::xchg does not have this problem. 3913 if (Atomic::xchg(1, &vm_created) == 1) { 3914 return JNI_EEXIST; // already created, or create attempt in progress 3915 } 3916 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3917 return JNI_ERR; // someone tried and failed and retry not allowed. 3918 } 3919 3920 assert(vm_created == 1, "vm_created is true during the creation"); 3921 3922 /** 3923 * Certain errors during initialization are recoverable and do not 3924 * prevent this method from being called again at a later time 3925 * (perhaps with different arguments). However, at a certain 3926 * point during initialization if an error occurs we cannot allow 3927 * this function to be called again (or it will crash). In those 3928 * situations, the 'canTryAgain' flag is set to false, which atomically 3929 * sets safe_to_recreate_vm to 1, such that any new call to 3930 * JNI_CreateJavaVM will immediately fail using the above logic. 3931 */ 3932 bool can_try_again = true; 3933 3934 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3935 if (result == JNI_OK) { 3936 JavaThread *thread = JavaThread::current(); 3937 assert(!thread->has_pending_exception(), "should have returned not OK"); 3938 /* thread is thread_in_vm here */ 3939 *vm = (JavaVM *)(&main_vm); 3940 *(JNIEnv**)penv = thread->jni_environment(); 3941 3942 #if INCLUDE_JVMCI 3943 if (EnableJVMCI) { 3944 if (UseJVMCICompiler) { 3945 // JVMCI is initialized on a CompilerThread 3946 if (BootstrapJVMCI) { 3947 JavaThread* THREAD = thread; 3948 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3949 compiler->bootstrap(THREAD); 3950 if (HAS_PENDING_EXCEPTION) { 3951 HandleMark hm; 3952 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3953 } 3954 } 3955 } 3956 } 3957 #endif 3958 3959 // Notify JVMTI 3960 if (JvmtiExport::should_post_thread_life()) { 3961 JvmtiExport::post_thread_start(thread); 3962 } 3963 3964 post_thread_start_event(thread); 3965 3966 #ifndef PRODUCT 3967 if (ReplayCompiles) ciReplay::replay(thread); 3968 3969 // Some platforms (like Win*) need a wrapper around these test 3970 // functions in order to properly handle error conditions. 3971 VMError::test_error_handler(); 3972 #endif 3973 3974 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3975 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3976 } else { 3977 // If create_vm exits because of a pending exception, exit with that 3978 // exception. In the future when we figure out how to reclaim memory, 3979 // we may be able to exit with JNI_ERR and allow the calling application 3980 // to continue. 3981 if (Universe::is_fully_initialized()) { 3982 // otherwise no pending exception possible - VM will already have aborted 3983 JavaThread* THREAD = JavaThread::current(); 3984 if (HAS_PENDING_EXCEPTION) { 3985 HandleMark hm; 3986 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3987 } 3988 } 3989 3990 if (can_try_again) { 3991 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3992 safe_to_recreate_vm = 1; 3993 } 3994 3995 // Creation failed. We must reset vm_created 3996 *vm = 0; 3997 *(JNIEnv**)penv = 0; 3998 // reset vm_created last to avoid race condition. Use OrderAccess to 3999 // control both compiler and architectural-based reordering. 4000 OrderAccess::release_store(&vm_created, 0); 4001 } 4002 4003 // Flush stdout and stderr before exit. 4004 fflush(stdout); 4005 fflush(stderr); 4006 4007 return result; 4008 4009 } 4010 4011 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4012 jint result = JNI_ERR; 4013 // On Windows, let CreateJavaVM run with SEH protection 4014 #ifdef _WIN32 4015 __try { 4016 #endif 4017 result = JNI_CreateJavaVM_inner(vm, penv, args); 4018 #ifdef _WIN32 4019 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4020 // Nothing to do. 4021 } 4022 #endif 4023 return result; 4024 } 4025 4026 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4027 // See bug 4367188, the wrapper can sometimes cause VM crashes 4028 // JNIWrapper("GetCreatedJavaVMs"); 4029 4030 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4031 4032 if (vm_created == 1) { 4033 if (numVMs != NULL) *numVMs = 1; 4034 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4035 } else { 4036 if (numVMs != NULL) *numVMs = 0; 4037 } 4038 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4039 return JNI_OK; 4040 } 4041 4042 extern "C" { 4043 4044 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4045 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4046 4047 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4048 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4049 jint res = JNI_ERR; 4050 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4051 4052 if (vm_created == 0) { 4053 res = JNI_ERR; 4054 return res; 4055 } 4056 4057 JNIWrapper("DestroyJavaVM"); 4058 JNIEnv *env; 4059 JavaVMAttachArgs destroyargs; 4060 destroyargs.version = CurrentVersion; 4061 destroyargs.name = (char *)"DestroyJavaVM"; 4062 destroyargs.group = NULL; 4063 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4064 if (res != JNI_OK) { 4065 return res; 4066 } 4067 4068 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4069 JavaThread* thread = JavaThread::current(); 4070 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4071 if (Threads::destroy_vm()) { 4072 // Should not change thread state, VM is gone 4073 vm_created = 0; 4074 res = JNI_OK; 4075 return res; 4076 } else { 4077 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4078 res = JNI_ERR; 4079 return res; 4080 } 4081 } 4082 4083 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4084 jint result = JNI_ERR; 4085 // On Windows, we need SEH protection 4086 #ifdef _WIN32 4087 __try { 4088 #endif 4089 result = jni_DestroyJavaVM_inner(vm); 4090 #ifdef _WIN32 4091 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4092 // Nothing to do. 4093 } 4094 #endif 4095 return result; 4096 } 4097 4098 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4099 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4100 4101 // Check below commented out from JDK1.2fcs as well 4102 /* 4103 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4104 return JNI_EVERSION; 4105 } 4106 */ 4107 4108 Thread* t = Thread::current_or_null(); 4109 if (t != NULL) { 4110 // If the thread has been attached this operation is a no-op 4111 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4112 return JNI_OK; 4113 } 4114 4115 // Create a thread and mark it as attaching so it will be skipped by the 4116 // ThreadsListEnumerator - see CR 6404306 4117 JavaThread* thread = new JavaThread(true); 4118 4119 // Set correct safepoint info. The thread is going to call into Java when 4120 // initializing the Java level thread object. Hence, the correct state must 4121 // be set in order for the Safepoint code to deal with it correctly. 4122 thread->set_thread_state(_thread_in_vm); 4123 thread->record_stack_base_and_size(); 4124 thread->register_thread_stack_with_NMT(); 4125 thread->initialize_thread_current(); 4126 4127 if (!os::create_attached_thread(thread)) { 4128 thread->smr_delete(); 4129 return JNI_ERR; 4130 } 4131 // Enable stack overflow checks 4132 thread->create_stack_guard_pages(); 4133 4134 thread->initialize_tlab(); 4135 4136 thread->cache_global_variables(); 4137 4138 // This thread will not do a safepoint check, since it has 4139 // not been added to the Thread list yet. 4140 { MutexLocker ml(Threads_lock); 4141 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4142 // avoid this thread trying to do a GC before it is added to the thread-list 4143 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4144 Threads::add(thread, daemon); 4145 } 4146 // Create thread group and name info from attach arguments 4147 oop group = NULL; 4148 char* thread_name = NULL; 4149 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4150 group = JNIHandles::resolve(args->group); 4151 thread_name = args->name; // may be NULL 4152 } 4153 if (group == NULL) group = Universe::main_thread_group(); 4154 4155 // Create Java level thread object and attach it to this thread 4156 bool attach_failed = false; 4157 { 4158 EXCEPTION_MARK; 4159 HandleMark hm(THREAD); 4160 Handle thread_group(THREAD, group); 4161 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4162 if (HAS_PENDING_EXCEPTION) { 4163 CLEAR_PENDING_EXCEPTION; 4164 // cleanup outside the handle mark. 4165 attach_failed = true; 4166 } 4167 } 4168 4169 if (attach_failed) { 4170 // Added missing cleanup 4171 thread->cleanup_failed_attach_current_thread(daemon); 4172 return JNI_ERR; 4173 } 4174 4175 // mark the thread as no longer attaching 4176 // this uses a fence to push the change through so we don't have 4177 // to regrab the threads_lock 4178 thread->set_done_attaching_via_jni(); 4179 4180 // Set java thread status. 4181 java_lang_Thread::set_thread_status(thread->threadObj(), 4182 java_lang_Thread::RUNNABLE); 4183 4184 // Notify the debugger 4185 if (JvmtiExport::should_post_thread_life()) { 4186 JvmtiExport::post_thread_start(thread); 4187 } 4188 4189 post_thread_start_event(thread); 4190 4191 *(JNIEnv**)penv = thread->jni_environment(); 4192 4193 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4194 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4195 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4196 // needed. 4197 4198 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4199 4200 // Perform any platform dependent FPU setup 4201 os::setup_fpu(); 4202 4203 return JNI_OK; 4204 } 4205 4206 4207 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4208 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4209 if (vm_created == 0) { 4210 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4211 return JNI_ERR; 4212 } 4213 4214 JNIWrapper("AttachCurrentThread"); 4215 jint ret = attach_current_thread(vm, penv, _args, false); 4216 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4217 return ret; 4218 } 4219 4220 4221 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4222 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4223 4224 JNIWrapper("DetachCurrentThread"); 4225 4226 // If the thread has already been detached the operation is a no-op 4227 if (Thread::current_or_null() == NULL) { 4228 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4229 return JNI_OK; 4230 } 4231 4232 VM_Exit::block_if_vm_exited(); 4233 4234 JavaThread* thread = JavaThread::current(); 4235 if (thread->has_last_Java_frame()) { 4236 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4237 // Can't detach a thread that's running java, that can't work. 4238 return JNI_ERR; 4239 } 4240 4241 // Safepoint support. Have to do call-back to safepoint code, if in the 4242 // middle of a safepoint operation 4243 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4244 4245 // XXX: Note that JavaThread::exit() call below removes the guards on the 4246 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4247 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4248 // of the guards is visible in jni_AttachCurrentThread above, 4249 // the removal of the guards is buried below in JavaThread::exit() 4250 // here. The abstraction should be more symmetrically either exposed 4251 // or hidden (e.g. it could probably be hidden in the same 4252 // (platform-dependent) methods where we do alternate stack 4253 // maintenance work?) 4254 thread->exit(false, JavaThread::jni_detach); 4255 thread->smr_delete(); 4256 4257 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4258 return JNI_OK; 4259 } 4260 4261 DT_RETURN_MARK_DECL(GetEnv, jint 4262 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4263 4264 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4265 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4266 jint ret = JNI_ERR; 4267 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4268 4269 if (vm_created == 0) { 4270 *penv = NULL; 4271 ret = JNI_EDETACHED; 4272 return ret; 4273 } 4274 4275 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4276 return ret; 4277 } 4278 4279 #ifndef JVMPI_VERSION_1 4280 // need these in order to be polite about older agents 4281 #define JVMPI_VERSION_1 ((jint)0x10000001) 4282 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4283 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4284 #endif // !JVMPI_VERSION_1 4285 4286 Thread* thread = Thread::current_or_null(); 4287 if (thread != NULL && thread->is_Java_thread()) { 4288 if (Threads::is_supported_jni_version_including_1_1(version)) { 4289 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4290 ret = JNI_OK; 4291 return ret; 4292 4293 } else if (version == JVMPI_VERSION_1 || 4294 version == JVMPI_VERSION_1_1 || 4295 version == JVMPI_VERSION_1_2) { 4296 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4297 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4298 ret = JNI_EVERSION; 4299 return ret; 4300 } else if (JvmtiExport::is_jvmdi_version(version)) { 4301 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4302 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4303 ret = JNI_EVERSION; 4304 return ret; 4305 } else { 4306 *penv = NULL; 4307 ret = JNI_EVERSION; 4308 return ret; 4309 } 4310 } else { 4311 *penv = NULL; 4312 ret = JNI_EDETACHED; 4313 return ret; 4314 } 4315 } 4316 4317 4318 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4319 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4320 if (vm_created == 0) { 4321 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4322 return JNI_ERR; 4323 } 4324 4325 JNIWrapper("AttachCurrentThreadAsDaemon"); 4326 jint ret = attach_current_thread(vm, penv, _args, true); 4327 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4328 return ret; 4329 } 4330 4331 4332 } // End extern "C" 4333 4334 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4335 NULL, 4336 NULL, 4337 NULL, 4338 4339 jni_DestroyJavaVM, 4340 jni_AttachCurrentThread, 4341 jni_DetachCurrentThread, 4342 jni_GetEnv, 4343 jni_AttachCurrentThreadAsDaemon 4344 };