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/deoptimization.hpp" 70 #include "runtime/fieldDescriptor.inline.hpp" 71 #include "runtime/handles.inline.hpp" 72 #include "runtime/interfaceSupport.inline.hpp" 73 #include "runtime/java.hpp" 74 #include "runtime/javaCalls.hpp" 75 #include "runtime/jfieldIDWorkaround.hpp" 76 #include "runtime/jniHandles.inline.hpp" 77 #include "runtime/orderAccess.hpp" 78 #include "runtime/reflection.hpp" 79 #include "runtime/safepointVerifiers.hpp" 80 #include "runtime/sharedRuntime.hpp" 81 #include "runtime/signature.hpp" 82 #include "runtime/thread.inline.hpp" 83 #include "runtime/vmOperations.hpp" 84 #include "services/memTracker.hpp" 85 #include "services/runtimeService.hpp" 86 #include "utilities/defaultStream.hpp" 87 #include "utilities/dtrace.hpp" 88 #include "utilities/events.hpp" 89 #include "utilities/histogram.hpp" 90 #include "utilities/macros.hpp" 91 #include "utilities/vmError.hpp" 92 93 static jint CurrentVersion = JNI_VERSION_10; 94 95 #ifdef _WIN32 96 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 97 #endif 98 99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 100 // '-return' probe regardless of the return path is taken out of the function. 101 // Methods that have multiple return paths use this to avoid having to 102 // instrument each return path. Methods that use CHECK or THROW must use this 103 // since those macros can cause an immedate uninstrumented return. 104 // 105 // In order to get the return value, a reference to the variable containing 106 // the return value must be passed to the contructor of the object, and 107 // the return value must be set before return (since the mark object has 108 // a reference to it). 109 // 110 // Example: 111 // DT_RETURN_MARK_DECL(SomeFunc, int); 112 // JNI_ENTRY(int, SomeFunc, ...) 113 // int return_value = 0; 114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 115 // foo(CHECK_0) 116 // return_value = 5; 117 // return return_value; 118 // JNI_END 119 #define DT_RETURN_MARK_DECL(name, type, probe) \ 120 DTRACE_ONLY( \ 121 class DTraceReturnProbeMark_##name { \ 122 public: \ 123 const type& _ret_ref; \ 124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 125 ~DTraceReturnProbeMark_##name() { \ 126 probe; \ 127 } \ 128 } \ 129 ) 130 // Void functions are simpler since there's no return value 131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 132 DTRACE_ONLY( \ 133 class DTraceReturnProbeMark_##name { \ 134 public: \ 135 ~DTraceReturnProbeMark_##name() { \ 136 probe; \ 137 } \ 138 } \ 139 ) 140 141 // Place these macros in the function to mark the return. Non-void 142 // functions need the type and address of the return value. 143 #define DT_RETURN_MARK(name, type, ref) \ 144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 145 #define DT_VOID_RETURN_MARK(name) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 147 148 149 // Use these to select distinct code for floating-point vs. non-floating point 150 // situations. Used from within common macros where we need slightly 151 // different behavior for Float/Double 152 #define FP_SELECT_Boolean(intcode, fpcode) intcode 153 #define FP_SELECT_Byte(intcode, fpcode) intcode 154 #define FP_SELECT_Char(intcode, fpcode) intcode 155 #define FP_SELECT_Short(intcode, fpcode) intcode 156 #define FP_SELECT_Object(intcode, fpcode) intcode 157 #define FP_SELECT_Int(intcode, fpcode) intcode 158 #define FP_SELECT_Long(intcode, fpcode) intcode 159 #define FP_SELECT_Float(intcode, fpcode) fpcode 160 #define FP_SELECT_Double(intcode, fpcode) fpcode 161 #define FP_SELECT(TypeName, intcode, fpcode) \ 162 FP_SELECT_##TypeName(intcode, fpcode) 163 164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 165 // (dtrace doesn't do FP yet) 166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 167 FP_SELECT(TypeName, \ 168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 170 FP_SELECT(TypeName, \ 171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 172 173 174 // out-of-line helpers for class jfieldIDWorkaround: 175 176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 178 uintptr_t as_uint = (uintptr_t) id; 179 intptr_t offset = raw_instance_offset(id); 180 if (is_checked_jfieldID(id)) { 181 if (!klass_hash_ok(k, id)) { 182 return false; 183 } 184 } 185 return InstanceKlass::cast(k)->contains_field_offset(offset); 186 } else { 187 JNIid* result = (JNIid*) id; 188 #ifdef ASSERT 189 return result != NULL && result->is_static_field_id(); 190 #else 191 return result != NULL; 192 #endif 193 } 194 } 195 196 197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 198 if (offset <= small_offset_mask) { 199 Klass* field_klass = k; 200 Klass* super_klass = field_klass->super(); 201 // With compressed oops the most super class with nonstatic fields would 202 // be the owner of fields embedded in the header. 203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 205 field_klass = super_klass; // super contains the field also 206 super_klass = field_klass->super(); 207 } 208 debug_only(NoSafepointVerifier nosafepoint;) 209 uintptr_t klass_hash = field_klass->identity_hash(); 210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 211 } else { 212 #if 0 213 #ifndef PRODUCT 214 { 215 ResourceMark rm; 216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 217 } 218 #endif 219 #endif 220 return 0; 221 } 222 } 223 224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 225 uintptr_t as_uint = (uintptr_t) id; 226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 227 do { 228 debug_only(NoSafepointVerifier nosafepoint;) 229 // Could use a non-blocking query for identity_hash here... 230 if ((k->identity_hash() & klass_mask) == klass_hash) 231 return true; 232 k = k->super(); 233 } while (k != NULL); 234 return false; 235 } 236 237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 239 uintptr_t as_uint = (uintptr_t) id; 240 intptr_t offset = raw_instance_offset(id); 241 if (VerifyJNIFields) { 242 if (is_checked_jfieldID(id)) { 243 guarantee(klass_hash_ok(k, id), 244 "Bug in native code: jfieldID class must match object"); 245 } else { 246 #if 0 247 #ifndef PRODUCT 248 if (Verbose) { 249 ResourceMark rm; 250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 251 } 252 #endif 253 #endif 254 } 255 } 256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 257 "Bug in native code: jfieldID offset must address interior of object"); 258 } 259 260 // Wrapper to trace JNI functions 261 262 #ifdef ASSERT 263 Histogram* JNIHistogram; 264 static volatile int JNIHistogram_lock = 0; 265 266 class JNIHistogramElement : public HistogramElement { 267 public: 268 JNIHistogramElement(const char* name); 269 }; 270 271 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 272 _name = elementName; 273 uintx count = 0; 274 275 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 276 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 277 count +=1; 278 if ( (WarnOnStalledSpinLock > 0) 279 && (count % WarnOnStalledSpinLock == 0)) { 280 warning("JNIHistogram_lock seems to be stalled"); 281 } 282 } 283 } 284 285 286 if(JNIHistogram == NULL) 287 JNIHistogram = new Histogram("JNI Call Counts",100); 288 289 JNIHistogram->add_element(this); 290 Atomic::dec(&JNIHistogram_lock); 291 } 292 293 #define JNICountWrapper(arg) \ 294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 296 if (e != NULL) e->increment_count() 297 #define JNIWrapper(arg) JNICountWrapper(arg); 298 #else 299 #define JNIWrapper(arg) 300 #endif 301 302 303 // Implementation of JNI entries 304 305 DT_RETURN_MARK_DECL(DefineClass, jclass 306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 307 308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 309 const jbyte *buf, jsize bufLen)) 310 JNIWrapper("DefineClass"); 311 312 HOTSPOT_JNI_DEFINECLASS_ENTRY( 313 env, (char*) name, loaderRef, (char*) buf, bufLen); 314 315 jclass cls = NULL; 316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 317 318 TempNewSymbol class_name = NULL; 319 // Since exceptions can be thrown, class initialization can take place 320 // if name is NULL no check for class name in .class stream has to be made. 321 if (name != NULL) { 322 const int str_len = (int)strlen(name); 323 if (str_len > Symbol::max_length()) { 324 // It's impossible to create this class; the name cannot fit 325 // into the constant pool. 326 Exceptions::fthrow(THREAD_AND_LOCATION, 327 vmSymbols::java_lang_NoClassDefFoundError(), 328 "Class name exceeds maximum length of %d: %s", 329 Symbol::max_length(), 330 name); 331 return 0; 332 } 333 class_name = SymbolTable::new_symbol(name); 334 } 335 ResourceMark rm(THREAD); 336 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 337 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 338 339 if (UsePerfData && !class_loader.is_null()) { 340 // check whether the current caller thread holds the lock or not. 341 // If not, increment the corresponding counter 342 if (ObjectSynchronizer:: 343 query_lock_ownership((JavaThread*)THREAD, class_loader) != 344 ObjectSynchronizer::owner_self) { 345 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 346 } 347 } 348 Klass* k = SystemDictionary::resolve_from_stream(class_name, 349 class_loader, 350 Handle(), 351 &st, 352 CHECK_NULL); 353 354 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 355 trace_class_resolution(k); 356 } 357 358 cls = (jclass)JNIHandles::make_local( 359 env, k->java_mirror()); 360 return cls; 361 JNI_END 362 363 364 365 DT_RETURN_MARK_DECL(FindClass, jclass 366 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 367 368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 369 JNIWrapper("FindClass"); 370 371 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 372 373 jclass result = NULL; 374 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 375 376 // Sanity check the name: it cannot be null or larger than the maximum size 377 // name we can fit in the constant pool. 378 if (name == NULL) { 379 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 380 } 381 if ((int)strlen(name) > Symbol::max_length()) { 382 Exceptions::fthrow(THREAD_AND_LOCATION, 383 vmSymbols::java_lang_NoClassDefFoundError(), 384 "Class name exceeds maximum length of %d: %s", 385 Symbol::max_length(), 386 name); 387 return 0; 388 } 389 390 //%note jni_3 391 Handle protection_domain; 392 // Find calling class 393 Klass* k = thread->security_get_caller_class(0); 394 // default to the system loader when no context 395 Handle loader(THREAD, SystemDictionary::java_system_loader()); 396 if (k != NULL) { 397 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 398 // in the correct class context. 399 if (k->class_loader() == NULL && 400 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 401 JavaValue result(T_OBJECT); 402 JavaCalls::call_static(&result, k, 403 vmSymbols::getFromClass_name(), 404 vmSymbols::void_class_signature(), 405 CHECK_NULL); 406 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 407 // a non-NULL Class object. When invoked from JNI_OnUnload, 408 // it will return NULL to indicate no context. 409 oop mirror = (oop) result.get_jobject(); 410 if (mirror != NULL) { 411 Klass* fromClass = java_lang_Class::as_Klass(mirror); 412 loader = Handle(THREAD, fromClass->class_loader()); 413 protection_domain = Handle(THREAD, fromClass->protection_domain()); 414 } 415 } else { 416 loader = Handle(THREAD, k->class_loader()); 417 } 418 } 419 420 TempNewSymbol sym = SymbolTable::new_symbol(name); 421 result = find_class_from_class_loader(env, sym, true, loader, 422 protection_domain, true, thread); 423 424 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 425 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 426 } 427 428 return result; 429 JNI_END 430 431 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 432 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 433 434 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 435 JNIWrapper("FromReflectedMethod"); 436 437 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 438 439 jmethodID ret = NULL; 440 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 441 442 // method is a handle to a java.lang.reflect.Method object 443 oop reflected = JNIHandles::resolve_non_null(method); 444 oop mirror = NULL; 445 int slot = 0; 446 447 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 448 mirror = java_lang_reflect_Constructor::clazz(reflected); 449 slot = java_lang_reflect_Constructor::slot(reflected); 450 } else { 451 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 452 mirror = java_lang_reflect_Method::clazz(reflected); 453 slot = java_lang_reflect_Method::slot(reflected); 454 } 455 Klass* k1 = java_lang_Class::as_Klass(mirror); 456 457 // Make sure class is initialized before handing id's out to methods 458 k1->initialize(CHECK_NULL); 459 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 460 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 461 return ret; 462 JNI_END 463 464 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 465 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 466 467 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 468 JNIWrapper("FromReflectedField"); 469 470 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 471 472 jfieldID ret = NULL; 473 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 474 475 // field is a handle to a java.lang.reflect.Field object 476 oop reflected = JNIHandles::resolve_non_null(field); 477 oop mirror = java_lang_reflect_Field::clazz(reflected); 478 Klass* k1 = java_lang_Class::as_Klass(mirror); 479 int slot = java_lang_reflect_Field::slot(reflected); 480 int modifiers = java_lang_reflect_Field::modifiers(reflected); 481 482 // Make sure class is initialized before handing id's out to fields 483 k1->initialize(CHECK_NULL); 484 485 // First check if this is a static field 486 if (modifiers & JVM_ACC_STATIC) { 487 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 488 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 489 assert(id != NULL, "corrupt Field object"); 490 debug_only(id->set_is_static_field_id();) 491 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 492 ret = jfieldIDWorkaround::to_static_jfieldID(id); 493 return ret; 494 } 495 496 // The slot is the index of the field description in the field-array 497 // The jfieldID is the offset of the field within the object 498 // It may also have hash bits for k, if VerifyJNIFields is turned on. 499 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 500 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 501 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 502 return ret; 503 JNI_END 504 505 506 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 507 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 508 509 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 510 JNIWrapper("ToReflectedMethod"); 511 512 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 513 514 jobject ret = NULL; 515 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 516 517 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 518 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 519 oop reflection_method; 520 if (m->is_initializer()) { 521 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 522 } else { 523 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 524 } 525 ret = JNIHandles::make_local(env, reflection_method); 526 return ret; 527 JNI_END 528 529 DT_RETURN_MARK_DECL(GetSuperclass, jclass 530 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 531 532 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 533 JNIWrapper("GetSuperclass"); 534 535 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 536 537 jclass obj = NULL; 538 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 539 540 oop mirror = JNIHandles::resolve_non_null(sub); 541 // primitive classes return NULL 542 if (java_lang_Class::is_primitive(mirror)) return NULL; 543 544 // Rules of Class.getSuperClass as implemented by KLass::java_super: 545 // arrays return Object 546 // interfaces return NULL 547 // proper classes return Klass::super() 548 Klass* k = java_lang_Class::as_Klass(mirror); 549 if (k->is_interface()) return NULL; 550 551 // return mirror for superclass 552 Klass* super = k->java_super(); 553 // super2 is the value computed by the compiler's getSuperClass intrinsic: 554 debug_only(Klass* super2 = ( k->is_array_klass() 555 ? SystemDictionary::Object_klass() 556 : k->super() ) ); 557 assert(super == super2, 558 "java_super computation depends on interface, array, other super"); 559 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 560 return obj; 561 JNI_END 562 563 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 564 JNIWrapper("IsSubclassOf"); 565 566 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 567 568 oop sub_mirror = JNIHandles::resolve_non_null(sub); 569 oop super_mirror = JNIHandles::resolve_non_null(super); 570 if (java_lang_Class::is_primitive(sub_mirror) || 571 java_lang_Class::is_primitive(super_mirror)) { 572 jboolean ret = oopDesc::equals(sub_mirror, super_mirror); 573 574 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 575 return ret; 576 } 577 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 578 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 579 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 580 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 581 JNI_TRUE : JNI_FALSE; 582 583 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 584 return ret; 585 JNI_END 586 587 588 DT_RETURN_MARK_DECL(Throw, jint 589 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 590 591 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 592 JNIWrapper("Throw"); 593 594 HOTSPOT_JNI_THROW_ENTRY(env, obj); 595 596 jint ret = JNI_OK; 597 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 598 599 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 600 ShouldNotReachHere(); 601 return 0; // Mute compiler. 602 JNI_END 603 604 605 DT_RETURN_MARK_DECL(ThrowNew, jint 606 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 607 608 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 609 JNIWrapper("ThrowNew"); 610 611 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 612 613 jint ret = JNI_OK; 614 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 615 616 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 617 Symbol* name = k->name(); 618 Handle class_loader (THREAD, k->class_loader()); 619 Handle protection_domain (THREAD, k->protection_domain()); 620 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 621 ShouldNotReachHere(); 622 return 0; // Mute compiler. 623 JNI_END 624 625 626 // JNI functions only transform a pending async exception to a synchronous 627 // exception in ExceptionOccurred and ExceptionCheck calls, since 628 // delivering an async exception in other places won't change the native 629 // code's control flow and would be harmful when native code further calls 630 // JNI functions with a pending exception. Async exception is also checked 631 // during the call, so ExceptionOccurred/ExceptionCheck won't return 632 // false but deliver the async exception at the very end during 633 // state transition. 634 635 static void jni_check_async_exceptions(JavaThread *thread) { 636 assert(thread == Thread::current(), "must be itself"); 637 thread->check_and_handle_async_exceptions(); 638 } 639 640 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 641 JNIWrapper("ExceptionOccurred"); 642 643 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 644 645 jni_check_async_exceptions(thread); 646 oop exception = thread->pending_exception(); 647 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 648 649 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 650 return ret; 651 JNI_END 652 653 654 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 655 JNIWrapper("ExceptionDescribe"); 656 657 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 658 659 if (thread->has_pending_exception()) { 660 Handle ex(thread, thread->pending_exception()); 661 thread->clear_pending_exception(); 662 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 663 // Don't print anything if we are being killed. 664 } else { 665 jio_fprintf(defaultStream::error_stream(), "Exception "); 666 if (thread != NULL && thread->threadObj() != NULL) { 667 ResourceMark rm(THREAD); 668 jio_fprintf(defaultStream::error_stream(), 669 "in thread \"%s\" ", thread->get_thread_name()); 670 } 671 if (ex->is_a(SystemDictionary::Throwable_klass())) { 672 JavaValue result(T_VOID); 673 JavaCalls::call_virtual(&result, 674 ex, 675 SystemDictionary::Throwable_klass(), 676 vmSymbols::printStackTrace_name(), 677 vmSymbols::void_method_signature(), 678 THREAD); 679 // If an exception is thrown in the call it gets thrown away. Not much 680 // we can do with it. The native code that calls this, does not check 681 // for the exception - hence, it might still be in the thread when DestroyVM gets 682 // called, potentially causing a few asserts to trigger - since no pending exception 683 // is expected. 684 CLEAR_PENDING_EXCEPTION; 685 } else { 686 ResourceMark rm(THREAD); 687 jio_fprintf(defaultStream::error_stream(), 688 ". Uncaught exception of type %s.", 689 ex->klass()->external_name()); 690 } 691 } 692 } 693 694 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 695 JNI_END 696 697 698 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 699 JNIWrapper("ExceptionClear"); 700 701 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 702 703 // The jni code might be using this API to clear java thrown exception. 704 // So just mark jvmti thread exception state as exception caught. 705 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 706 if (state != NULL && state->is_exception_detected()) { 707 state->set_exception_caught(); 708 } 709 thread->clear_pending_exception(); 710 711 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 712 JNI_END 713 714 715 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 716 JNIWrapper("FatalError"); 717 718 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 719 720 tty->print_cr("FATAL ERROR in native method: %s", msg); 721 thread->print_stack(); 722 os::abort(); // Dump core and abort 723 JNI_END 724 725 726 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 727 JNIWrapper("PushLocalFrame"); 728 729 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 730 731 //%note jni_11 732 if (capacity < 0 || 733 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 734 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 735 return JNI_ERR; 736 } 737 JNIHandleBlock* old_handles = thread->active_handles(); 738 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 739 assert(new_handles != NULL, "should not be NULL"); 740 new_handles->set_pop_frame_link(old_handles); 741 thread->set_active_handles(new_handles); 742 jint ret = JNI_OK; 743 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 744 return ret; 745 JNI_END 746 747 748 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 749 JNIWrapper("PopLocalFrame"); 750 751 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 752 753 //%note jni_11 754 Handle result_handle(thread, JNIHandles::resolve(result)); 755 JNIHandleBlock* old_handles = thread->active_handles(); 756 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 757 if (new_handles != NULL) { 758 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 759 // This way code will still work if PopLocalFrame is called without a corresponding 760 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 761 // the release_block call will release the blocks. 762 thread->set_active_handles(new_handles); 763 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 764 JNIHandleBlock::release_block(old_handles, thread); // may block 765 result = JNIHandles::make_local(thread, result_handle()); 766 } 767 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 768 return result; 769 JNI_END 770 771 772 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 773 JNIWrapper("NewGlobalRef"); 774 775 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 776 777 Handle ref_handle(thread, JNIHandles::resolve(ref)); 778 jobject ret = JNIHandles::make_global(ref_handle); 779 780 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 781 return ret; 782 JNI_END 783 784 // Must be JNI_ENTRY (with HandleMark) 785 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 786 JNIWrapper("DeleteGlobalRef"); 787 788 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 789 790 JNIHandles::destroy_global(ref); 791 792 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 793 JNI_END 794 795 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 796 JNIWrapper("DeleteLocalRef"); 797 798 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 799 800 JNIHandles::destroy_local(obj); 801 802 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 803 JNI_END 804 805 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 806 JNIWrapper("IsSameObject"); 807 808 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 809 810 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 811 812 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 813 return ret; 814 JNI_END 815 816 817 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 818 JNIWrapper("NewLocalRef"); 819 820 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 821 822 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 823 824 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 825 return ret; 826 JNI_END 827 828 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 829 JNIWrapper("EnsureLocalCapacity"); 830 831 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 832 833 jint ret; 834 if (capacity >= 0 && 835 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 836 ret = JNI_OK; 837 } else { 838 ret = JNI_ERR; 839 } 840 841 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 842 return ret; 843 JNI_END 844 845 // Return the Handle Type 846 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 847 JNIWrapper("GetObjectRefType"); 848 849 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 850 851 jobjectRefType ret = JNIInvalidRefType; 852 if (obj != NULL) { 853 ret = JNIHandles::handle_type(thread, obj); 854 } 855 856 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 857 return ret; 858 JNI_END 859 860 861 class JNI_ArgumentPusher : public SignatureIterator { 862 protected: 863 JavaCallArguments* _arguments; 864 865 virtual void get_bool () = 0; 866 virtual void get_char () = 0; 867 virtual void get_short () = 0; 868 virtual void get_byte () = 0; 869 virtual void get_int () = 0; 870 virtual void get_long () = 0; 871 virtual void get_float () = 0; 872 virtual void get_double () = 0; 873 virtual void get_object () = 0; 874 875 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 876 this->_return_type = T_ILLEGAL; 877 _arguments = NULL; 878 } 879 880 public: 881 virtual void iterate( uint64_t fingerprint ) = 0; 882 883 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 884 885 inline void do_bool() { if (!is_return_type()) get_bool(); } 886 inline void do_char() { if (!is_return_type()) get_char(); } 887 inline void do_short() { if (!is_return_type()) get_short(); } 888 inline void do_byte() { if (!is_return_type()) get_byte(); } 889 inline void do_int() { if (!is_return_type()) get_int(); } 890 inline void do_long() { if (!is_return_type()) get_long(); } 891 inline void do_float() { if (!is_return_type()) get_float(); } 892 inline void do_double() { if (!is_return_type()) get_double(); } 893 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 894 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 895 inline void do_void() { } 896 897 JavaCallArguments* arguments() { return _arguments; } 898 void push_receiver(Handle h) { _arguments->push_oop(h); } 899 }; 900 901 902 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 903 protected: 904 va_list _ap; 905 906 inline void get_bool() { 907 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 908 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 909 // TemplateInterpreterGenerator::generate_result_handler_for and 910 // SharedRuntime::generate_native_wrapper. 911 jboolean b = va_arg(_ap, jint); 912 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 913 } 914 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 915 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 916 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 917 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 918 919 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 920 921 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 922 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 923 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 924 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 925 926 inline void set_ap(va_list rap) { 927 va_copy(_ap, rap); 928 } 929 930 public: 931 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 932 : JNI_ArgumentPusher(signature) { 933 set_ap(rap); 934 } 935 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 936 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 937 set_ap(rap); 938 } 939 940 // Optimized path if we have the bitvector form of signature 941 void iterate( uint64_t fingerprint ) { 942 if (fingerprint == (uint64_t)CONST64(-1)) { 943 SignatureIterator::iterate(); // Must be too many arguments 944 } else { 945 _return_type = (BasicType)((fingerprint >> static_feature_size) & 946 result_feature_mask); 947 948 assert(fingerprint, "Fingerprint should not be 0"); 949 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 950 while ( 1 ) { 951 switch ( fingerprint & parameter_feature_mask ) { 952 case bool_parm: 953 get_bool(); 954 break; 955 case char_parm: 956 get_char(); 957 break; 958 case short_parm: 959 get_short(); 960 break; 961 case byte_parm: 962 get_byte(); 963 break; 964 case int_parm: 965 get_int(); 966 break; 967 case obj_parm: 968 get_object(); 969 break; 970 case long_parm: 971 get_long(); 972 break; 973 case float_parm: 974 get_float(); 975 break; 976 case double_parm: 977 get_double(); 978 break; 979 case done_parm: 980 return; 981 break; 982 default: 983 ShouldNotReachHere(); 984 break; 985 } 986 fingerprint >>= parameter_feature_size; 987 } 988 } 989 } 990 }; 991 992 993 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 994 protected: 995 const jvalue *_ap; 996 997 inline void get_bool() { 998 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 999 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1000 // TemplateInterpreterGenerator::generate_result_handler_for and 1001 // SharedRuntime::generate_native_wrapper. 1002 jboolean b = (_ap++)->z; 1003 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1004 } 1005 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1006 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1007 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1008 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1009 1010 inline void get_long() { _arguments->push_long((_ap++)->j); } 1011 inline void get_float() { _arguments->push_float((_ap++)->f); } 1012 inline void get_double() { _arguments->push_double((_ap++)->d);} 1013 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1014 1015 inline void set_ap(const jvalue *rap) { _ap = rap; } 1016 1017 public: 1018 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1019 : JNI_ArgumentPusher(signature) { 1020 set_ap(rap); 1021 } 1022 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1023 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1024 set_ap(rap); 1025 } 1026 1027 // Optimized path if we have the bitvector form of signature 1028 void iterate( uint64_t fingerprint ) { 1029 if (fingerprint == (uint64_t)CONST64(-1)) { 1030 SignatureIterator::iterate(); // Must be too many arguments 1031 } else { 1032 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1033 result_feature_mask); 1034 assert(fingerprint, "Fingerprint should not be 0"); 1035 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1036 while ( 1 ) { 1037 switch ( fingerprint & parameter_feature_mask ) { 1038 case bool_parm: 1039 get_bool(); 1040 break; 1041 case char_parm: 1042 get_char(); 1043 break; 1044 case short_parm: 1045 get_short(); 1046 break; 1047 case byte_parm: 1048 get_byte(); 1049 break; 1050 case int_parm: 1051 get_int(); 1052 break; 1053 case obj_parm: 1054 get_object(); 1055 break; 1056 case long_parm: 1057 get_long(); 1058 break; 1059 case float_parm: 1060 get_float(); 1061 break; 1062 case double_parm: 1063 get_double(); 1064 break; 1065 case done_parm: 1066 return; 1067 break; 1068 default: 1069 ShouldNotReachHere(); 1070 break; 1071 } 1072 fingerprint >>= parameter_feature_size; 1073 } 1074 } 1075 } 1076 }; 1077 1078 1079 enum JNICallType { 1080 JNI_STATIC, 1081 JNI_VIRTUAL, 1082 JNI_NONVIRTUAL 1083 }; 1084 1085 1086 1087 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1088 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1089 1090 // Create object to hold arguments for the JavaCall, and associate it with 1091 // the jni parser 1092 ResourceMark rm(THREAD); 1093 int number_of_parameters = method->size_of_parameters(); 1094 JavaCallArguments java_args(number_of_parameters); 1095 args->set_java_argument_object(&java_args); 1096 1097 assert(method->is_static(), "method should be static"); 1098 1099 // Fill out JavaCallArguments object 1100 args->iterate( Fingerprinter(method).fingerprint() ); 1101 // Initialize result type 1102 result->set_type(args->get_ret_type()); 1103 1104 // Invoke the method. Result is returned as oop. 1105 JavaCalls::call(result, method, &java_args, CHECK); 1106 1107 // Convert result 1108 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1109 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1110 } 1111 } 1112 1113 1114 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1115 oop recv = JNIHandles::resolve(receiver); 1116 if (recv == NULL) { 1117 THROW(vmSymbols::java_lang_NullPointerException()); 1118 } 1119 Handle h_recv(THREAD, recv); 1120 1121 int number_of_parameters; 1122 Method* selected_method; 1123 { 1124 Method* m = Method::resolve_jmethod_id(method_id); 1125 number_of_parameters = m->size_of_parameters(); 1126 Klass* holder = m->method_holder(); 1127 if (call_type != JNI_VIRTUAL) { 1128 selected_method = m; 1129 } else if (!m->has_itable_index()) { 1130 // non-interface call -- for that little speed boost, don't handlize 1131 debug_only(NoSafepointVerifier nosafepoint;) 1132 // jni_GetMethodID makes sure class is linked and initialized 1133 // so m should have a valid vtable index. 1134 assert(m->valid_vtable_index(), "no valid vtable index"); 1135 int vtbl_index = m->vtable_index(); 1136 if (vtbl_index != Method::nonvirtual_vtable_index) { 1137 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1138 } else { 1139 // final method 1140 selected_method = m; 1141 } 1142 } else { 1143 // interface call 1144 int itbl_index = m->itable_index(); 1145 Klass* k = h_recv->klass(); 1146 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1147 } 1148 } 1149 1150 methodHandle method(THREAD, selected_method); 1151 1152 // Create object to hold arguments for the JavaCall, and associate it with 1153 // the jni parser 1154 ResourceMark rm(THREAD); 1155 JavaCallArguments java_args(number_of_parameters); 1156 args->set_java_argument_object(&java_args); 1157 1158 // handle arguments 1159 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1160 args->push_receiver(h_recv); // Push jobject handle 1161 1162 // Fill out JavaCallArguments object 1163 args->iterate( Fingerprinter(method).fingerprint() ); 1164 // Initialize result type 1165 result->set_type(args->get_ret_type()); 1166 1167 // Invoke the method. Result is returned as oop. 1168 JavaCalls::call(result, method, &java_args, CHECK); 1169 1170 // Convert result 1171 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1172 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1173 } 1174 } 1175 1176 1177 static instanceOop alloc_object(jclass clazz, TRAPS) { 1178 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1179 if (k == NULL) { 1180 ResourceMark rm(THREAD); 1181 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1182 } 1183 k->check_valid_for_instantiation(false, CHECK_NULL); 1184 k->initialize(CHECK_NULL); 1185 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1186 return ih; 1187 } 1188 1189 DT_RETURN_MARK_DECL(AllocObject, jobject 1190 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1191 1192 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1193 JNIWrapper("AllocObject"); 1194 1195 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1196 1197 jobject ret = NULL; 1198 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1199 1200 instanceOop i = alloc_object(clazz, CHECK_NULL); 1201 ret = JNIHandles::make_local(env, i); 1202 return ret; 1203 JNI_END 1204 1205 DT_RETURN_MARK_DECL(NewObjectA, jobject 1206 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1207 1208 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1209 JNIWrapper("NewObjectA"); 1210 1211 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1212 1213 jobject obj = NULL; 1214 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1215 1216 instanceOop i = alloc_object(clazz, CHECK_NULL); 1217 obj = JNIHandles::make_local(env, i); 1218 JavaValue jvalue(T_VOID); 1219 JNI_ArgumentPusherArray ap(methodID, args); 1220 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1221 return obj; 1222 JNI_END 1223 1224 1225 DT_RETURN_MARK_DECL(NewObjectV, jobject 1226 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1227 1228 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1229 JNIWrapper("NewObjectV"); 1230 1231 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1232 1233 jobject obj = NULL; 1234 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1235 1236 instanceOop i = alloc_object(clazz, CHECK_NULL); 1237 obj = JNIHandles::make_local(env, i); 1238 JavaValue jvalue(T_VOID); 1239 JNI_ArgumentPusherVaArg ap(methodID, args); 1240 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1241 return obj; 1242 JNI_END 1243 1244 1245 DT_RETURN_MARK_DECL(NewObject, jobject 1246 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1247 1248 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1249 JNIWrapper("NewObject"); 1250 1251 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1252 1253 jobject obj = NULL; 1254 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1255 1256 instanceOop i = alloc_object(clazz, CHECK_NULL); 1257 obj = JNIHandles::make_local(env, i); 1258 va_list args; 1259 va_start(args, methodID); 1260 JavaValue jvalue(T_VOID); 1261 JNI_ArgumentPusherVaArg ap(methodID, args); 1262 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1263 va_end(args); 1264 return obj; 1265 JNI_END 1266 1267 1268 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1269 JNIWrapper("GetObjectClass"); 1270 1271 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1272 1273 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1274 jclass ret = 1275 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1276 1277 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1278 return ret; 1279 JNI_END 1280 1281 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1282 JNIWrapper("IsInstanceOf"); 1283 1284 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1285 1286 jboolean ret = JNI_TRUE; 1287 if (obj != NULL) { 1288 ret = JNI_FALSE; 1289 Klass* k = java_lang_Class::as_Klass( 1290 JNIHandles::resolve_non_null(clazz)); 1291 if (k != NULL) { 1292 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1293 } 1294 } 1295 1296 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1297 return ret; 1298 JNI_END 1299 1300 1301 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1302 const char *sig, bool is_static, TRAPS) { 1303 // %%%% This code should probably just call into a method in the LinkResolver 1304 // 1305 // The class should have been loaded (we have an instance of the class 1306 // passed in) so the method and signature should already be in the symbol 1307 // table. If they're not there, the method doesn't exist. 1308 const char *name_to_probe = (name_str == NULL) 1309 ? vmSymbols::object_initializer_name()->as_C_string() 1310 : name_str; 1311 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1312 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1313 1314 if (name == NULL || signature == NULL) { 1315 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1316 } 1317 1318 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1319 1320 // Throw a NoSuchMethodError exception if we have an instance of a 1321 // primitive java.lang.Class 1322 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1323 ResourceMark rm; 1324 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1325 } 1326 1327 // Make sure class is linked and initialized before handing id's out to 1328 // Method*s. 1329 klass->initialize(CHECK_NULL); 1330 1331 Method* m; 1332 if (name == vmSymbols::object_initializer_name() || 1333 name == vmSymbols::class_initializer_name()) { 1334 // Never search superclasses for constructors 1335 if (klass->is_instance_klass()) { 1336 m = InstanceKlass::cast(klass)->find_method(name, signature); 1337 } else { 1338 m = NULL; 1339 } 1340 } else { 1341 m = klass->lookup_method(name, signature); 1342 if (m == NULL && klass->is_instance_klass()) { 1343 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1344 } 1345 } 1346 if (m == NULL || (m->is_static() != is_static)) { 1347 ResourceMark rm; 1348 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig)); 1349 } 1350 return m->jmethod_id(); 1351 } 1352 1353 1354 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1355 const char *name, const char *sig)) 1356 JNIWrapper("GetMethodID"); 1357 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1358 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1359 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1360 return ret; 1361 JNI_END 1362 1363 1364 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1365 const char *name, const char *sig)) 1366 JNIWrapper("GetStaticMethodID"); 1367 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1368 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1369 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1370 return ret; 1371 JNI_END 1372 1373 1374 1375 // 1376 // Calling Methods 1377 // 1378 1379 1380 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1381 , EntryProbe, ReturnProbe) \ 1382 \ 1383 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1384 , ReturnProbe); \ 1385 \ 1386 JNI_ENTRY(ResultType, \ 1387 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1388 JNIWrapper("Call" XSTR(Result) "Method"); \ 1389 \ 1390 EntryProbe; \ 1391 ResultType ret = 0;\ 1392 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1393 (const ResultType&)ret);\ 1394 \ 1395 va_list args; \ 1396 va_start(args, methodID); \ 1397 JavaValue jvalue(Tag); \ 1398 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1399 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1400 va_end(args); \ 1401 ret = jvalue.get_##ResultType(); \ 1402 return ret;\ 1403 JNI_END 1404 1405 // the runtime type of subword integral basic types is integer 1406 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1407 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1408 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1409 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1410 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1411 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1412 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1413 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1414 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1415 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1416 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1417 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1418 1419 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1420 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1421 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1422 DEFINE_CALLMETHOD(jint, Int, T_INT, 1423 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1425 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1426 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1428 // Float and double probes don't return value because dtrace doesn't currently support it 1429 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1430 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1431 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1432 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1433 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1434 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1435 1436 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1437 , EntryProbe, ReturnProbe) \ 1438 \ 1439 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1440 , ReturnProbe); \ 1441 \ 1442 JNI_ENTRY(ResultType, \ 1443 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1444 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1445 \ 1446 EntryProbe;\ 1447 ResultType ret = 0;\ 1448 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1449 (const ResultType&)ret);\ 1450 \ 1451 JavaValue jvalue(Tag); \ 1452 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1453 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1454 ret = jvalue.get_##ResultType(); \ 1455 return ret;\ 1456 JNI_END 1457 1458 // the runtime type of subword integral basic types is integer 1459 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1460 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1461 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1462 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1463 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1464 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1465 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1466 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1467 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1468 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1469 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1470 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1471 1472 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1473 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1474 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1475 DEFINE_CALLMETHODV(jint, Int, T_INT, 1476 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1478 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1479 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1481 // Float and double probes don't return value because dtrace doesn't currently support it 1482 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1483 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1484 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1485 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1486 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1488 1489 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1490 , EntryProbe, ReturnProbe) \ 1491 \ 1492 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1493 , ReturnProbe); \ 1494 \ 1495 JNI_ENTRY(ResultType, \ 1496 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1497 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1498 EntryProbe; \ 1499 ResultType ret = 0;\ 1500 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1501 (const ResultType&)ret);\ 1502 \ 1503 JavaValue jvalue(Tag); \ 1504 JNI_ArgumentPusherArray ap(methodID, args); \ 1505 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1506 ret = jvalue.get_##ResultType(); \ 1507 return ret;\ 1508 JNI_END 1509 1510 // the runtime type of subword integral basic types is integer 1511 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1512 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1513 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1514 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1515 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1516 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1517 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1518 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1519 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1520 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1521 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1522 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1523 1524 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1525 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1526 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1527 DEFINE_CALLMETHODA(jint, Int, T_INT, 1528 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1530 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1531 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1533 // Float and double probes don't return value because dtrace doesn't currently support it 1534 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1535 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1537 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1538 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1539 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1540 1541 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1542 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1544 1545 1546 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1547 JNIWrapper("CallVoidMethod"); 1548 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1549 DT_VOID_RETURN_MARK(CallVoidMethod); 1550 1551 va_list args; 1552 va_start(args, methodID); 1553 JavaValue jvalue(T_VOID); 1554 JNI_ArgumentPusherVaArg ap(methodID, args); 1555 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1556 va_end(args); 1557 JNI_END 1558 1559 1560 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1561 JNIWrapper("CallVoidMethodV"); 1562 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1563 DT_VOID_RETURN_MARK(CallVoidMethodV); 1564 1565 JavaValue jvalue(T_VOID); 1566 JNI_ArgumentPusherVaArg ap(methodID, args); 1567 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1568 JNI_END 1569 1570 1571 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1572 JNIWrapper("CallVoidMethodA"); 1573 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1574 DT_VOID_RETURN_MARK(CallVoidMethodA); 1575 1576 JavaValue jvalue(T_VOID); 1577 JNI_ArgumentPusherArray ap(methodID, args); 1578 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1579 JNI_END 1580 1581 1582 1583 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1584 , EntryProbe, ReturnProbe) \ 1585 \ 1586 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1587 , ReturnProbe);\ 1588 \ 1589 JNI_ENTRY(ResultType, \ 1590 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1591 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1592 \ 1593 EntryProbe;\ 1594 ResultType ret;\ 1595 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1596 (const ResultType&)ret);\ 1597 \ 1598 va_list args; \ 1599 va_start(args, methodID); \ 1600 JavaValue jvalue(Tag); \ 1601 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1602 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1603 va_end(args); \ 1604 ret = jvalue.get_##ResultType(); \ 1605 return ret;\ 1606 JNI_END 1607 1608 // the runtime type of subword integral basic types is integer 1609 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1610 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1611 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1612 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1613 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1614 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1615 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1616 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1617 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1618 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1619 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1620 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1621 1622 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1623 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1624 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1625 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1626 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1627 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1628 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1629 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 // Float and double probes don't return value because dtrace doesn't currently support it 1631 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1632 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1633 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1634 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1635 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1636 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1637 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1638 1639 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1640 , EntryProbe, ReturnProbe) \ 1641 \ 1642 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1643 , ReturnProbe);\ 1644 \ 1645 JNI_ENTRY(ResultType, \ 1646 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1647 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1648 \ 1649 EntryProbe;\ 1650 ResultType ret;\ 1651 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1652 (const ResultType&)ret);\ 1653 \ 1654 JavaValue jvalue(Tag); \ 1655 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1656 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1657 ret = jvalue.get_##ResultType(); \ 1658 return ret;\ 1659 JNI_END 1660 1661 // the runtime type of subword integral basic types is integer 1662 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1663 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1664 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1665 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1666 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1667 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1668 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1669 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1670 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1671 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1672 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1673 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1674 1675 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1676 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1677 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1678 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1679 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1680 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1681 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1682 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 // Float and double probes don't return value because dtrace doesn't currently support it 1684 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1685 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1686 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1687 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1688 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1689 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1690 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1691 1692 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1693 , EntryProbe, ReturnProbe) \ 1694 \ 1695 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1696 , ReturnProbe);\ 1697 \ 1698 JNI_ENTRY(ResultType, \ 1699 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1700 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1701 \ 1702 EntryProbe;\ 1703 ResultType ret;\ 1704 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1705 (const ResultType&)ret);\ 1706 \ 1707 JavaValue jvalue(Tag); \ 1708 JNI_ArgumentPusherArray ap(methodID, args); \ 1709 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1710 ret = jvalue.get_##ResultType(); \ 1711 return ret;\ 1712 JNI_END 1713 1714 // the runtime type of subword integral basic types is integer 1715 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1716 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1717 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1718 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1719 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1720 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1721 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1722 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1723 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1724 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1725 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1726 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1727 1728 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1729 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1730 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1731 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1732 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1734 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1735 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 // Float and double probes don't return value because dtrace doesn't currently support it 1737 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1738 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1739 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1740 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1741 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1742 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1743 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1744 1745 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1746 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1747 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1748 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1749 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1750 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1751 1752 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1753 JNIWrapper("CallNonvirtualVoidMethod"); 1754 1755 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1756 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1757 1758 va_list args; 1759 va_start(args, methodID); 1760 JavaValue jvalue(T_VOID); 1761 JNI_ArgumentPusherVaArg ap(methodID, args); 1762 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1763 va_end(args); 1764 JNI_END 1765 1766 1767 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1768 JNIWrapper("CallNonvirtualVoidMethodV"); 1769 1770 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1771 env, obj, cls, (uintptr_t) methodID); 1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1773 1774 JavaValue jvalue(T_VOID); 1775 JNI_ArgumentPusherVaArg ap(methodID, args); 1776 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1777 JNI_END 1778 1779 1780 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1781 JNIWrapper("CallNonvirtualVoidMethodA"); 1782 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1783 env, obj, cls, (uintptr_t) methodID); 1784 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1785 JavaValue jvalue(T_VOID); 1786 JNI_ArgumentPusherArray ap(methodID, args); 1787 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1788 JNI_END 1789 1790 1791 1792 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1793 , EntryProbe, ResultProbe) \ 1794 \ 1795 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1796 , ResultProbe); \ 1797 \ 1798 JNI_ENTRY(ResultType, \ 1799 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1800 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1801 \ 1802 EntryProbe; \ 1803 ResultType ret = 0;\ 1804 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1805 (const ResultType&)ret);\ 1806 \ 1807 va_list args; \ 1808 va_start(args, methodID); \ 1809 JavaValue jvalue(Tag); \ 1810 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1811 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1812 va_end(args); \ 1813 ret = jvalue.get_##ResultType(); \ 1814 return ret;\ 1815 JNI_END 1816 1817 // the runtime type of subword integral basic types is integer 1818 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1819 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1820 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1821 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1822 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1823 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1824 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1825 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1826 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1827 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1828 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1829 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1830 1831 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1832 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1833 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1834 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1835 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1836 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1837 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1838 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1840 // Float and double probes don't return value because dtrace doesn't currently support it 1841 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1842 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1843 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1844 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1845 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1846 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1847 1848 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1849 , EntryProbe, ResultProbe) \ 1850 \ 1851 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1852 , ResultProbe); \ 1853 \ 1854 JNI_ENTRY(ResultType, \ 1855 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1856 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1857 \ 1858 EntryProbe; \ 1859 ResultType ret = 0;\ 1860 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1861 (const ResultType&)ret);\ 1862 \ 1863 JavaValue jvalue(Tag); \ 1864 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1865 /* Make sure class is initialized before trying to invoke its method */ \ 1866 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1867 k->initialize(CHECK_0); \ 1868 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1869 va_end(args); \ 1870 ret = jvalue.get_##ResultType(); \ 1871 return ret;\ 1872 JNI_END 1873 1874 // the runtime type of subword integral basic types is integer 1875 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1876 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1877 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1878 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1879 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1880 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1881 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1882 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1883 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1884 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1885 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1886 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1887 1888 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1889 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1890 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1891 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1892 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1893 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1894 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1895 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1897 // Float and double probes don't return value because dtrace doesn't currently support it 1898 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1899 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1900 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1901 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1902 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1903 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1904 1905 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1906 , EntryProbe, ResultProbe) \ 1907 \ 1908 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1909 , ResultProbe); \ 1910 \ 1911 JNI_ENTRY(ResultType, \ 1912 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1913 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1914 \ 1915 EntryProbe; \ 1916 ResultType ret = 0;\ 1917 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1918 (const ResultType&)ret);\ 1919 \ 1920 JavaValue jvalue(Tag); \ 1921 JNI_ArgumentPusherArray ap(methodID, args); \ 1922 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1923 ret = jvalue.get_##ResultType(); \ 1924 return ret;\ 1925 JNI_END 1926 1927 // the runtime type of subword integral basic types is integer 1928 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1929 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1930 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1931 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1932 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1933 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1934 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1935 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1936 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1937 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1938 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1939 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1940 1941 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1942 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1943 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1944 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1945 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1946 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1947 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1948 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1950 // Float and double probes don't return value because dtrace doesn't currently support it 1951 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1952 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1953 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1954 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1955 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1956 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1957 1958 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1959 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1960 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1961 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1962 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1963 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1964 1965 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1966 JNIWrapper("CallStaticVoidMethod"); 1967 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1968 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1969 1970 va_list args; 1971 va_start(args, methodID); 1972 JavaValue jvalue(T_VOID); 1973 JNI_ArgumentPusherVaArg ap(methodID, args); 1974 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1975 va_end(args); 1976 JNI_END 1977 1978 1979 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1980 JNIWrapper("CallStaticVoidMethodV"); 1981 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1982 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1983 1984 JavaValue jvalue(T_VOID); 1985 JNI_ArgumentPusherVaArg ap(methodID, args); 1986 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1987 JNI_END 1988 1989 1990 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1991 JNIWrapper("CallStaticVoidMethodA"); 1992 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1993 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1994 1995 JavaValue jvalue(T_VOID); 1996 JNI_ArgumentPusherArray ap(methodID, args); 1997 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1998 JNI_END 1999 2000 2001 // 2002 // Accessing Fields 2003 // 2004 2005 2006 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2007 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2008 2009 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2010 const char *name, const char *sig)) 2011 JNIWrapper("GetFieldID"); 2012 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2013 jfieldID ret = 0; 2014 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2015 2016 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2017 2018 // The class should have been loaded (we have an instance of the class 2019 // passed in) so the field and signature should already be in the symbol 2020 // table. If they're not there, the field doesn't exist. 2021 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2022 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2023 if (fieldname == NULL || signame == NULL) { 2024 ResourceMark rm; 2025 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 2026 } 2027 2028 // Make sure class is initialized before handing id's out to fields 2029 k->initialize(CHECK_NULL); 2030 2031 fieldDescriptor fd; 2032 if (!k->is_instance_klass() || 2033 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2034 ResourceMark rm; 2035 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig)); 2036 } 2037 2038 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2039 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2040 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2041 return ret; 2042 JNI_END 2043 2044 2045 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2046 JNIWrapper("GetObjectField"); 2047 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2048 oop o = JNIHandles::resolve_non_null(obj); 2049 Klass* k = o->klass(); 2050 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2051 // Keep JVMTI addition small and only check enabled flag here. 2052 // jni_GetField_probe() assumes that is okay to create handles. 2053 if (JvmtiExport::should_post_field_access()) { 2054 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2055 } 2056 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 2057 jobject ret = JNIHandles::make_local(env, loaded_obj); 2058 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2059 return ret; 2060 JNI_END 2061 2062 2063 2064 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2065 , EntryProbe, ReturnProbe) \ 2066 \ 2067 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2068 , ReturnProbe); \ 2069 \ 2070 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2071 JNIWrapper("Get" XSTR(Result) "Field"); \ 2072 \ 2073 EntryProbe; \ 2074 Return ret = 0;\ 2075 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2076 \ 2077 oop o = JNIHandles::resolve_non_null(obj); \ 2078 Klass* k = o->klass(); \ 2079 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2080 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2081 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2082 /* and creates a ResetNoHandleMark. */ \ 2083 if (JvmtiExport::should_post_field_access()) { \ 2084 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2085 } \ 2086 ret = o->Fieldname##_field(offset); \ 2087 return ret; \ 2088 JNI_END 2089 2090 DEFINE_GETFIELD(jboolean, bool, Boolean 2091 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2092 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2093 DEFINE_GETFIELD(jbyte, byte, Byte 2094 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2095 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2096 DEFINE_GETFIELD(jchar, char, Char 2097 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2098 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2099 DEFINE_GETFIELD(jshort, short, Short 2100 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2101 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2102 DEFINE_GETFIELD(jint, int, Int 2103 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2104 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2105 DEFINE_GETFIELD(jlong, long, Long 2106 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2107 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2108 // Float and double probes don't return value because dtrace doesn't currently support it 2109 DEFINE_GETFIELD(jfloat, float, Float 2110 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2111 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2112 DEFINE_GETFIELD(jdouble, double, Double 2113 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2114 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2115 2116 address jni_GetBooleanField_addr() { 2117 return (address)jni_GetBooleanField; 2118 } 2119 address jni_GetByteField_addr() { 2120 return (address)jni_GetByteField; 2121 } 2122 address jni_GetCharField_addr() { 2123 return (address)jni_GetCharField; 2124 } 2125 address jni_GetShortField_addr() { 2126 return (address)jni_GetShortField; 2127 } 2128 address jni_GetIntField_addr() { 2129 return (address)jni_GetIntField; 2130 } 2131 address jni_GetLongField_addr() { 2132 return (address)jni_GetLongField; 2133 } 2134 address jni_GetFloatField_addr() { 2135 return (address)jni_GetFloatField; 2136 } 2137 address jni_GetDoubleField_addr() { 2138 return (address)jni_GetDoubleField; 2139 } 2140 2141 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2142 JNIWrapper("SetObjectField"); 2143 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2144 oop o = JNIHandles::resolve_non_null(obj); 2145 Klass* k = o->klass(); 2146 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2147 // Keep JVMTI addition small and only check enabled flag here. 2148 // jni_SetField_probe_nh() assumes that is not okay to create handles 2149 // and creates a ResetNoHandleMark. 2150 if (JvmtiExport::should_post_field_modification()) { 2151 jvalue field_value; 2152 field_value.l = value; 2153 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2154 } 2155 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2156 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2157 JNI_END 2158 2159 2160 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2161 , EntryProbe, ReturnProbe) \ 2162 \ 2163 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2164 JNIWrapper("Set" XSTR(Result) "Field"); \ 2165 \ 2166 EntryProbe; \ 2167 \ 2168 oop o = JNIHandles::resolve_non_null(obj); \ 2169 Klass* k = o->klass(); \ 2170 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2171 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2172 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2173 /* and creates a ResetNoHandleMark. */ \ 2174 if (JvmtiExport::should_post_field_modification()) { \ 2175 jvalue field_value; \ 2176 field_value.unionType = value; \ 2177 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2178 } \ 2179 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2180 o->Fieldname##_field_put(offset, value); \ 2181 ReturnProbe; \ 2182 JNI_END 2183 2184 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2185 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2186 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2187 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2188 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2189 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2190 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2191 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2192 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2193 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2194 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2195 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2196 DEFINE_SETFIELD(jint, int, Int, 'I', i 2197 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2198 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2199 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2200 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2201 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2202 // Float and double probes don't return value because dtrace doesn't currently support it 2203 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2204 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2205 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2206 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2207 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2208 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2209 2210 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2211 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2212 2213 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2214 JNIWrapper("ToReflectedField"); 2215 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2216 jobject ret = NULL; 2217 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2218 2219 fieldDescriptor fd; 2220 bool found = false; 2221 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2222 2223 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2224 2225 if (isStatic) { 2226 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2227 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2228 assert(id->is_static_field_id(), "invalid static field id"); 2229 found = id->find_local_field(&fd); 2230 } else { 2231 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2232 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2233 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2234 } 2235 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2236 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2237 ret = JNIHandles::make_local(env, reflected); 2238 return ret; 2239 JNI_END 2240 2241 2242 // 2243 // Accessing Static Fields 2244 // 2245 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2246 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2247 2248 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2249 const char *name, const char *sig)) 2250 JNIWrapper("GetStaticFieldID"); 2251 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2252 jfieldID ret = NULL; 2253 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2254 2255 // The class should have been loaded (we have an instance of the class 2256 // passed in) so the field and signature should already be in the symbol 2257 // table. If they're not there, the field doesn't exist. 2258 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2259 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2260 if (fieldname == NULL || signame == NULL) { 2261 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2262 } 2263 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2264 // Make sure class is initialized before handing id's out to static fields 2265 k->initialize(CHECK_NULL); 2266 2267 fieldDescriptor fd; 2268 if (!k->is_instance_klass() || 2269 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2270 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2271 } 2272 2273 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2274 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2275 debug_only(id->set_is_static_field_id();) 2276 2277 debug_only(id->verify(fd.field_holder())); 2278 2279 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2280 return ret; 2281 JNI_END 2282 2283 2284 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2285 JNIWrapper("GetStaticObjectField"); 2286 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2287 #if INCLUDE_JNI_CHECK 2288 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2289 #endif // INCLUDE_JNI_CHECK 2290 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2291 assert(id->is_static_field_id(), "invalid static field id"); 2292 // Keep JVMTI addition small and only check enabled flag here. 2293 // jni_GetField_probe() assumes that is okay to create handles. 2294 if (JvmtiExport::should_post_field_access()) { 2295 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2296 } 2297 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2298 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2299 return ret; 2300 JNI_END 2301 2302 2303 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2304 , EntryProbe, ReturnProbe) \ 2305 \ 2306 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2307 , ReturnProbe); \ 2308 \ 2309 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2310 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2311 EntryProbe; \ 2312 Return ret = 0;\ 2313 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2314 (const Return&)ret);\ 2315 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2316 assert(id->is_static_field_id(), "invalid static field id"); \ 2317 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2318 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2319 if (JvmtiExport::should_post_field_access()) { \ 2320 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2321 } \ 2322 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2323 return ret;\ 2324 JNI_END 2325 2326 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2327 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2328 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2329 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2330 DEFINE_GETSTATICFIELD(jchar, char, Char 2331 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2332 DEFINE_GETSTATICFIELD(jshort, short, Short 2333 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2334 DEFINE_GETSTATICFIELD(jint, int, Int 2335 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2336 DEFINE_GETSTATICFIELD(jlong, long, Long 2337 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2338 // Float and double probes don't return value because dtrace doesn't currently support it 2339 DEFINE_GETSTATICFIELD(jfloat, float, Float 2340 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2341 DEFINE_GETSTATICFIELD(jdouble, double, Double 2342 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2343 2344 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2345 JNIWrapper("SetStaticObjectField"); 2346 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2347 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2348 assert(id->is_static_field_id(), "invalid static field id"); 2349 // Keep JVMTI addition small and only check enabled flag here. 2350 // jni_SetField_probe() assumes that is okay to create handles. 2351 if (JvmtiExport::should_post_field_modification()) { 2352 jvalue field_value; 2353 field_value.l = value; 2354 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2355 } 2356 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2357 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2358 JNI_END 2359 2360 2361 2362 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2363 , EntryProbe, ReturnProbe) \ 2364 \ 2365 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2366 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2367 EntryProbe; \ 2368 \ 2369 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2370 assert(id->is_static_field_id(), "invalid static field id"); \ 2371 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2372 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2373 if (JvmtiExport::should_post_field_modification()) { \ 2374 jvalue field_value; \ 2375 field_value.unionType = value; \ 2376 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2377 } \ 2378 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2379 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2380 ReturnProbe;\ 2381 JNI_END 2382 2383 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2384 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2385 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2386 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2387 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2388 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2389 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2390 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2391 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2392 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2393 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2394 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2395 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2396 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2397 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2398 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2399 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2400 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2401 // Float and double probes don't return value because dtrace doesn't currently support it 2402 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2403 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2404 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2405 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2406 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2407 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2408 2409 // 2410 // String Operations 2411 // 2412 2413 // Unicode Interface 2414 2415 DT_RETURN_MARK_DECL(NewString, jstring 2416 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2417 2418 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2419 JNIWrapper("NewString"); 2420 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2421 jstring ret = NULL; 2422 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2423 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2424 ret = (jstring) JNIHandles::make_local(env, string); 2425 return ret; 2426 JNI_END 2427 2428 2429 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2430 JNIWrapper("GetStringLength"); 2431 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2432 jsize ret = 0; 2433 oop s = JNIHandles::resolve_non_null(string); 2434 ret = java_lang_String::length(s); 2435 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2436 return ret; 2437 JNI_END 2438 2439 2440 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2441 JNIEnv *env, jstring string, jboolean *isCopy)) 2442 JNIWrapper("GetStringChars"); 2443 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2444 jchar* buf = NULL; 2445 oop s = JNIHandles::resolve_non_null(string); 2446 typeArrayOop s_value = java_lang_String::value(s); 2447 if (s_value != NULL) { 2448 int s_len = java_lang_String::length(s, s_value); 2449 bool is_latin1 = java_lang_String::is_latin1(s); 2450 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2451 /* JNI Specification states return NULL on OOM */ 2452 if (buf != NULL) { 2453 if (s_len > 0) { 2454 if (!is_latin1) { 2455 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2456 buf, s_len); 2457 } else { 2458 for (int i = 0; i < s_len; i++) { 2459 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2460 } 2461 } 2462 } 2463 buf[s_len] = 0; 2464 //%note jni_5 2465 if (isCopy != NULL) { 2466 *isCopy = JNI_TRUE; 2467 } 2468 } 2469 } 2470 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2471 return buf; 2472 JNI_END 2473 2474 2475 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2476 JNIWrapper("ReleaseStringChars"); 2477 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2478 //%note jni_6 2479 if (chars != NULL) { 2480 // Since String objects are supposed to be immutable, don't copy any 2481 // new data back. A bad user will have to go after the char array. 2482 FreeHeap((void*) chars); 2483 } 2484 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2485 JNI_END 2486 2487 2488 // UTF Interface 2489 2490 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2491 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2492 2493 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2494 JNIWrapper("NewStringUTF"); 2495 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2496 jstring ret; 2497 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2498 2499 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2500 ret = (jstring) JNIHandles::make_local(env, result); 2501 return ret; 2502 JNI_END 2503 2504 2505 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2506 JNIWrapper("GetStringUTFLength"); 2507 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2508 oop java_string = JNIHandles::resolve_non_null(string); 2509 jsize ret = java_lang_String::utf8_length(java_string); 2510 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2511 return ret; 2512 JNI_END 2513 2514 2515 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2516 JNIWrapper("GetStringUTFChars"); 2517 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2518 char* result = NULL; 2519 oop java_string = JNIHandles::resolve_non_null(string); 2520 typeArrayOop s_value = java_lang_String::value(java_string); 2521 if (s_value != NULL) { 2522 size_t length = java_lang_String::utf8_length(java_string, s_value); 2523 /* JNI Specification states return NULL on OOM */ 2524 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2525 if (result != NULL) { 2526 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2527 if (isCopy != NULL) { 2528 *isCopy = JNI_TRUE; 2529 } 2530 } 2531 } 2532 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2533 return result; 2534 JNI_END 2535 2536 2537 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2538 JNIWrapper("ReleaseStringUTFChars"); 2539 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2540 if (chars != NULL) { 2541 FreeHeap((char*) chars); 2542 } 2543 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2544 JNI_END 2545 2546 2547 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2548 JNIWrapper("GetArrayLength"); 2549 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2550 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2551 assert(a->is_array(), "must be array"); 2552 jsize ret = a->length(); 2553 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2554 return ret; 2555 JNI_END 2556 2557 2558 // 2559 // Object Array Operations 2560 // 2561 2562 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2563 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2564 2565 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2566 JNIWrapper("NewObjectArray"); 2567 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2568 jobjectArray ret = NULL; 2569 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2570 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2571 Klass* ak = ek->array_klass(CHECK_NULL); 2572 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2573 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2574 oop initial_value = JNIHandles::resolve(initialElement); 2575 if (initial_value != NULL) { // array already initialized with NULL 2576 for (int index = 0; index < length; index++) { 2577 result->obj_at_put(index, initial_value); 2578 } 2579 } 2580 ret = (jobjectArray) JNIHandles::make_local(env, result); 2581 return ret; 2582 JNI_END 2583 2584 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2585 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2586 2587 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2588 JNIWrapper("GetObjectArrayElement"); 2589 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2590 jobject ret = NULL; 2591 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2592 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2593 if (a->is_within_bounds(index)) { 2594 ret = JNIHandles::make_local(env, a->obj_at(index)); 2595 return ret; 2596 } else { 2597 ResourceMark rm(THREAD); 2598 stringStream ss; 2599 ss.print("Index %d out of bounds for length %d", index, a->length()); 2600 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2601 } 2602 JNI_END 2603 2604 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2605 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2606 2607 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2608 JNIWrapper("SetObjectArrayElement"); 2609 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2610 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2611 2612 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2613 oop v = JNIHandles::resolve(value); 2614 if (a->is_within_bounds(index)) { 2615 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2616 a->obj_at_put(index, v); 2617 } else { 2618 ResourceMark rm(THREAD); 2619 stringStream ss; 2620 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2621 ss.print("type mismatch: can not store %s to %s[%d]", 2622 v->klass()->external_name(), 2623 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2624 index); 2625 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2626 ss.print("[]"); 2627 } 2628 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2629 } 2630 } else { 2631 ResourceMark rm(THREAD); 2632 stringStream ss; 2633 ss.print("Index %d out of bounds for length %d", index, a->length()); 2634 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2635 } 2636 JNI_END 2637 2638 2639 2640 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2641 ,EntryProbe,ReturnProbe) \ 2642 \ 2643 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2644 , ReturnProbe); \ 2645 \ 2646 JNI_ENTRY(Return, \ 2647 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2648 JNIWrapper("New" XSTR(Result) "Array"); \ 2649 EntryProbe; \ 2650 Return ret = NULL;\ 2651 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2652 \ 2653 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2654 ret = (Return) JNIHandles::make_local(env, obj); \ 2655 return ret;\ 2656 JNI_END 2657 2658 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2659 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2660 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2661 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2662 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2663 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2664 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2665 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2666 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2667 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2668 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2669 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2670 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2671 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2672 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2673 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2674 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2675 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2676 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2677 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2678 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2679 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2680 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2681 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2682 2683 // Return an address which will fault if the caller writes to it. 2684 2685 static char* get_bad_address() { 2686 static char* bad_address = NULL; 2687 if (bad_address == NULL) { 2688 size_t size = os::vm_allocation_granularity(); 2689 bad_address = os::reserve_memory(size); 2690 if (bad_address != NULL) { 2691 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2692 /*is_committed*/false); 2693 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2694 } 2695 } 2696 return bad_address; 2697 } 2698 2699 2700 2701 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2702 , EntryProbe, ReturnProbe) \ 2703 \ 2704 JNI_QUICK_ENTRY(ElementType*, \ 2705 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2706 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2707 EntryProbe; \ 2708 /* allocate an chunk of memory in c land */ \ 2709 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2710 ElementType* result; \ 2711 int len = a->length(); \ 2712 if (len == 0) { \ 2713 if (isCopy != NULL) { \ 2714 *isCopy = JNI_FALSE; \ 2715 } \ 2716 /* Empty array: legal but useless, can't return NULL. \ 2717 * Return a pointer to something useless. \ 2718 * Avoid asserts in typeArrayOop. */ \ 2719 result = (ElementType*)get_bad_address(); \ 2720 } else { \ 2721 /* JNI Specification states return NULL on OOM */ \ 2722 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2723 if (result != NULL) { \ 2724 /* copy the array to the c chunk */ \ 2725 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2726 result, len); \ 2727 if (isCopy) { \ 2728 *isCopy = JNI_TRUE; \ 2729 } \ 2730 } \ 2731 } \ 2732 ReturnProbe; \ 2733 return result; \ 2734 JNI_END 2735 2736 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2737 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2738 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2739 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2740 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2741 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2742 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2743 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2744 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2745 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2746 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2747 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2748 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2749 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2750 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2751 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2752 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2753 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2754 // Float and double probes don't return value because dtrace doesn't currently support it 2755 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2756 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2757 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2758 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2759 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2760 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2761 2762 2763 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2764 , EntryProbe, ReturnProbe);\ 2765 \ 2766 JNI_QUICK_ENTRY(void, \ 2767 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2768 ElementType *buf, jint mode)) \ 2769 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2770 EntryProbe; \ 2771 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2772 int len = a->length(); \ 2773 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2774 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2775 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2776 } \ 2777 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2778 FreeHeap(buf); \ 2779 } \ 2780 } \ 2781 ReturnProbe; \ 2782 JNI_END 2783 2784 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2785 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2786 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2787 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2788 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2789 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2791 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2792 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2794 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2795 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2797 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2798 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2800 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2801 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2803 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2804 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2806 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2807 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2808 2809 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2810 ResourceMark rm(THREAD); 2811 if (copy_len < 0) { 2812 stringStream ss; 2813 ss.print("Length %d is negative", copy_len); 2814 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2815 } else if (start < 0 || (start > array_len - copy_len)) { 2816 stringStream ss; 2817 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2818 start, (int64_t)start+(int64_t)copy_len, array_len); 2819 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2820 } 2821 } 2822 2823 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2824 , EntryProbe, ReturnProbe); \ 2825 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2826 , ReturnProbe); \ 2827 \ 2828 JNI_ENTRY(void, \ 2829 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2830 jsize len, ElementType *buf)) \ 2831 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2832 EntryProbe; \ 2833 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2834 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2835 check_bounds(start, len, src->length(), CHECK); \ 2836 if (len > 0) { \ 2837 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2838 } \ 2839 JNI_END 2840 2841 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2842 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2843 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2844 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2845 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2846 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2847 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2848 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2849 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2850 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2851 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2852 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2853 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2854 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2855 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2856 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2857 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2858 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2859 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2860 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2861 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2862 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2863 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2864 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2865 2866 2867 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2868 , EntryProbe, ReturnProbe); \ 2869 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2870 ,ReturnProbe); \ 2871 \ 2872 JNI_ENTRY(void, \ 2873 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2874 jsize len, const ElementType *buf)) \ 2875 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2876 EntryProbe; \ 2877 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2878 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2879 check_bounds(start, len, dst->length(), CHECK); \ 2880 if (len > 0) { \ 2881 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2882 } \ 2883 JNI_END 2884 2885 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2886 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2887 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2888 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2889 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2890 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2891 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2892 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2893 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2894 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2895 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2896 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2897 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2898 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2899 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2900 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2901 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2902 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2903 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2904 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2905 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2906 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2907 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2908 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2909 2910 2911 // 2912 // Interception of natives 2913 // 2914 2915 // The RegisterNatives call being attempted tried to register with a method that 2916 // is not native. Ask JVM TI what prefixes have been specified. Then check 2917 // to see if the native method is now wrapped with the prefixes. See the 2918 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2919 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2920 #if INCLUDE_JVMTI 2921 ResourceMark rm(THREAD); 2922 Method* method; 2923 int name_len = name->utf8_length(); 2924 char* name_str = name->as_utf8(); 2925 int prefix_count; 2926 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2927 for (int i = 0; i < prefix_count; i++) { 2928 char* prefix = prefixes[i]; 2929 int prefix_len = (int)strlen(prefix); 2930 2931 // try adding this prefix to the method name and see if it matches another method name 2932 int trial_len = name_len + prefix_len; 2933 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2934 strcpy(trial_name_str, prefix); 2935 strcat(trial_name_str, name_str); 2936 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2937 if (trial_name == NULL) { 2938 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2939 } 2940 method = k->lookup_method(trial_name, signature); 2941 if (method == NULL) { 2942 continue; // signature doesn't match, try the next prefix 2943 } 2944 if (method->is_native()) { 2945 method->set_is_prefixed_native(); 2946 return method; // wahoo, we found a prefixed version of the method, return it 2947 } 2948 // found as non-native, so prefix is good, add it, probably just need more prefixes 2949 name_len = trial_len; 2950 name_str = trial_name_str; 2951 } 2952 #endif // INCLUDE_JVMTI 2953 return NULL; // not found 2954 } 2955 2956 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2957 Method* method = k->lookup_method(name, signature); 2958 if (method == NULL) { 2959 ResourceMark rm; 2960 stringStream st; 2961 st.print("Method '"); 2962 Method::print_external_name(&st, k, name, signature); 2963 st.print("' name or signature does not match"); 2964 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2965 } 2966 if (!method->is_native()) { 2967 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2968 method = find_prefixed_native(k, name, signature, THREAD); 2969 if (method == NULL) { 2970 ResourceMark rm; 2971 stringStream st; 2972 st.print("Method '"); 2973 Method::print_external_name(&st, k, name, signature); 2974 st.print("' is not declared as native"); 2975 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2976 } 2977 } 2978 2979 if (entry != NULL) { 2980 method->set_native_function(entry, 2981 Method::native_bind_event_is_interesting); 2982 } else { 2983 method->clear_native_function(); 2984 } 2985 if (PrintJNIResolving) { 2986 ResourceMark rm(THREAD); 2987 tty->print_cr("[Registering JNI native method %s.%s]", 2988 method->method_holder()->external_name(), 2989 method->name()->as_C_string()); 2990 } 2991 return true; 2992 } 2993 2994 DT_RETURN_MARK_DECL(RegisterNatives, jint 2995 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2996 2997 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2998 const JNINativeMethod *methods, 2999 jint nMethods)) 3000 JNIWrapper("RegisterNatives"); 3001 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3002 jint ret = 0; 3003 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3004 3005 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3006 3007 for (int index = 0; index < nMethods; index++) { 3008 const char* meth_name = methods[index].name; 3009 const char* meth_sig = methods[index].signature; 3010 int meth_name_len = (int)strlen(meth_name); 3011 3012 // The class should have been loaded (we have an instance of the class 3013 // passed in) so the method and signature should already be in the symbol 3014 // table. If they're not there, the method doesn't exist. 3015 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3016 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3017 3018 if (name == NULL || signature == NULL) { 3019 ResourceMark rm; 3020 stringStream st; 3021 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3022 // Must return negative value on failure 3023 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3024 } 3025 3026 bool res = register_native(k, name, signature, 3027 (address) methods[index].fnPtr, THREAD); 3028 if (!res) { 3029 ret = -1; 3030 break; 3031 } 3032 } 3033 return ret; 3034 JNI_END 3035 3036 3037 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3038 JNIWrapper("UnregisterNatives"); 3039 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3040 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3041 //%note jni_2 3042 if (k->is_instance_klass()) { 3043 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3044 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3045 if (m->is_native()) { 3046 m->clear_native_function(); 3047 m->set_signature_handler(NULL); 3048 } 3049 } 3050 } 3051 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3052 return 0; 3053 JNI_END 3054 3055 // 3056 // Monitor functions 3057 // 3058 3059 DT_RETURN_MARK_DECL(MonitorEnter, jint 3060 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3061 3062 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3063 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3064 jint ret = JNI_ERR; 3065 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3066 3067 // If the object is null, we can't do anything with it 3068 if (jobj == NULL) { 3069 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3070 } 3071 3072 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3073 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3074 ret = JNI_OK; 3075 return ret; 3076 JNI_END 3077 3078 DT_RETURN_MARK_DECL(MonitorExit, jint 3079 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3080 3081 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3082 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3083 jint ret = JNI_ERR; 3084 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3085 3086 // Don't do anything with a null object 3087 if (jobj == NULL) { 3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3089 } 3090 3091 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3092 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3093 3094 ret = JNI_OK; 3095 return ret; 3096 JNI_END 3097 3098 // 3099 // Extensions 3100 // 3101 3102 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3103 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3104 3105 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3106 JNIWrapper("GetStringRegion"); 3107 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3108 DT_VOID_RETURN_MARK(GetStringRegion); 3109 oop s = JNIHandles::resolve_non_null(string); 3110 typeArrayOop s_value = java_lang_String::value(s); 3111 int s_len = java_lang_String::length(s, s_value); 3112 if (start < 0 || len < 0 || start > s_len - len) { 3113 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3114 } else { 3115 if (len > 0) { 3116 bool is_latin1 = java_lang_String::is_latin1(s); 3117 if (!is_latin1) { 3118 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 3119 buf, len); 3120 } else { 3121 for (int i = 0; i < len; i++) { 3122 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3123 } 3124 } 3125 } 3126 } 3127 JNI_END 3128 3129 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3130 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3131 3132 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3133 JNIWrapper("GetStringUTFRegion"); 3134 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3135 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3136 oop s = JNIHandles::resolve_non_null(string); 3137 typeArrayOop s_value = java_lang_String::value(s); 3138 int s_len = java_lang_String::length(s, s_value); 3139 if (start < 0 || len < 0 || start > s_len - len) { 3140 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3141 } else { 3142 //%note jni_7 3143 if (len > 0) { 3144 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3145 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 3146 // as_utf8_string null-terminates the result string 3147 } else { 3148 // JDK null-terminates the buffer even in len is zero 3149 if (buf != NULL) { 3150 buf[0] = 0; 3151 } 3152 } 3153 } 3154 JNI_END 3155 3156 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 3157 if (Universe::heap()->supports_object_pinning()) { 3158 const oop o = JNIHandles::resolve_non_null(obj); 3159 return Universe::heap()->pin_object(thread, o); 3160 } else { 3161 GCLocker::lock_critical(thread); 3162 return JNIHandles::resolve_non_null(obj); 3163 } 3164 } 3165 3166 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 3167 if (Universe::heap()->supports_object_pinning()) { 3168 const oop o = JNIHandles::resolve_non_null(obj); 3169 return Universe::heap()->unpin_object(thread, o); 3170 } else { 3171 GCLocker::unlock_critical(thread); 3172 } 3173 } 3174 3175 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3176 JNIWrapper("GetPrimitiveArrayCritical"); 3177 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3178 if (isCopy != NULL) { 3179 *isCopy = JNI_FALSE; 3180 } 3181 oop a = lock_gc_or_pin_object(thread, array); 3182 assert(a->is_array(), "just checking"); 3183 BasicType type; 3184 if (a->is_objArray()) { 3185 type = T_OBJECT; 3186 } else { 3187 type = TypeArrayKlass::cast(a->klass())->element_type(); 3188 } 3189 void* ret = arrayOop(a)->base(type); 3190 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3191 return ret; 3192 JNI_END 3193 3194 3195 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3196 JNIWrapper("ReleasePrimitiveArrayCritical"); 3197 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3198 unlock_gc_or_unpin_object(thread, array); 3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3200 JNI_END 3201 3202 3203 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3204 JNIWrapper("GetStringCritical"); 3205 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3206 oop s = lock_gc_or_pin_object(thread, string); 3207 typeArrayOop s_value = java_lang_String::value(s); 3208 bool is_latin1 = java_lang_String::is_latin1(s); 3209 if (isCopy != NULL) { 3210 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3211 } 3212 jchar* ret; 3213 if (!is_latin1) { 3214 ret = (jchar*) s_value->base(T_CHAR); 3215 } else { 3216 // Inflate latin1 encoded string to UTF16 3217 int s_len = java_lang_String::length(s, s_value); 3218 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3219 /* JNI Specification states return NULL on OOM */ 3220 if (ret != NULL) { 3221 for (int i = 0; i < s_len; i++) { 3222 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3223 } 3224 ret[s_len] = 0; 3225 } 3226 } 3227 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3228 return ret; 3229 JNI_END 3230 3231 3232 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3233 JNIWrapper("ReleaseStringCritical"); 3234 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3235 // The str and chars arguments are ignored for UTF16 strings 3236 oop s = JNIHandles::resolve_non_null(str); 3237 bool is_latin1 = java_lang_String::is_latin1(s); 3238 if (is_latin1) { 3239 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3240 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3241 FREE_C_HEAP_ARRAY(jchar, chars); 3242 } 3243 unlock_gc_or_unpin_object(thread, str); 3244 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3245 JNI_END 3246 3247 3248 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3249 JNIWrapper("jni_NewWeakGlobalRef"); 3250 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3251 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3252 jweak ret = JNIHandles::make_weak_global(ref_handle); 3253 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3254 return ret; 3255 JNI_END 3256 3257 // Must be JNI_ENTRY (with HandleMark) 3258 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3259 JNIWrapper("jni_DeleteWeakGlobalRef"); 3260 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3261 JNIHandles::destroy_weak_global(ref); 3262 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3263 JNI_END 3264 3265 3266 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3267 JNIWrapper("jni_ExceptionCheck"); 3268 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3269 jni_check_async_exceptions(thread); 3270 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3271 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3272 return ret; 3273 JNI_END 3274 3275 3276 // Initialization state for three routines below relating to 3277 // java.nio.DirectBuffers 3278 static int directBufferSupportInitializeStarted = 0; 3279 static volatile int directBufferSupportInitializeEnded = 0; 3280 static volatile int directBufferSupportInitializeFailed = 0; 3281 static jclass bufferClass = NULL; 3282 static jclass directBufferClass = NULL; 3283 static jclass directByteBufferClass = NULL; 3284 static jmethodID directByteBufferConstructor = NULL; 3285 static jfieldID directBufferAddressField = NULL; 3286 static jfieldID bufferCapacityField = NULL; 3287 3288 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3289 Handle loader; // null (bootstrap) loader 3290 Handle protection_domain; // null protection domain 3291 3292 TempNewSymbol sym = SymbolTable::new_symbol(name); 3293 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3294 3295 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3296 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3297 } 3298 return result; 3299 } 3300 3301 // These lookups are done with the NULL (bootstrap) ClassLoader to 3302 // circumvent any security checks that would be done by jni_FindClass. 3303 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3304 { 3305 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3306 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3307 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3308 return true; 3309 } 3310 JNI_END 3311 3312 3313 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3314 if (directBufferSupportInitializeFailed) { 3315 return false; 3316 } 3317 3318 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3319 if (!lookupDirectBufferClasses(env)) { 3320 directBufferSupportInitializeFailed = 1; 3321 return false; 3322 } 3323 3324 // Make global references for these 3325 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3326 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3327 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3328 3329 // Get needed field and method IDs 3330 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3331 if (env->ExceptionCheck()) { 3332 env->ExceptionClear(); 3333 directBufferSupportInitializeFailed = 1; 3334 return false; 3335 } 3336 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3337 if (env->ExceptionCheck()) { 3338 env->ExceptionClear(); 3339 directBufferSupportInitializeFailed = 1; 3340 return false; 3341 } 3342 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3343 if (env->ExceptionCheck()) { 3344 env->ExceptionClear(); 3345 directBufferSupportInitializeFailed = 1; 3346 return false; 3347 } 3348 3349 if ((directByteBufferConstructor == NULL) || 3350 (directBufferAddressField == NULL) || 3351 (bufferCapacityField == NULL)) { 3352 directBufferSupportInitializeFailed = 1; 3353 return false; 3354 } 3355 3356 directBufferSupportInitializeEnded = 1; 3357 } else { 3358 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3359 os::naked_yield(); 3360 } 3361 } 3362 3363 return !directBufferSupportInitializeFailed; 3364 } 3365 3366 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3367 { 3368 // thread_from_jni_environment() will block if VM is gone. 3369 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3370 3371 JNIWrapper("jni_NewDirectByteBuffer"); 3372 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3373 3374 if (!directBufferSupportInitializeEnded) { 3375 if (!initializeDirectBufferSupport(env, thread)) { 3376 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3377 return NULL; 3378 } 3379 } 3380 3381 // Being paranoid about accidental sign extension on address 3382 jlong addr = (jlong) ((uintptr_t) address); 3383 // NOTE that package-private DirectByteBuffer constructor currently 3384 // takes int capacity 3385 jint cap = (jint) capacity; 3386 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3387 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3388 return ret; 3389 } 3390 3391 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3392 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3393 3394 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3395 { 3396 // thread_from_jni_environment() will block if VM is gone. 3397 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3398 3399 JNIWrapper("jni_GetDirectBufferAddress"); 3400 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3401 void* ret = NULL; 3402 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3403 3404 if (!directBufferSupportInitializeEnded) { 3405 if (!initializeDirectBufferSupport(env, thread)) { 3406 return 0; 3407 } 3408 } 3409 3410 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3411 return 0; 3412 } 3413 3414 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3415 return ret; 3416 } 3417 3418 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3419 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3420 3421 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3422 { 3423 // thread_from_jni_environment() will block if VM is gone. 3424 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3425 3426 JNIWrapper("jni_GetDirectBufferCapacity"); 3427 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3428 jlong ret = -1; 3429 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3430 3431 if (!directBufferSupportInitializeEnded) { 3432 if (!initializeDirectBufferSupport(env, thread)) { 3433 ret = 0; 3434 return ret; 3435 } 3436 } 3437 3438 if (buf == NULL) { 3439 return -1; 3440 } 3441 3442 if (!env->IsInstanceOf(buf, directBufferClass)) { 3443 return -1; 3444 } 3445 3446 // NOTE that capacity is currently an int in the implementation 3447 ret = env->GetIntField(buf, bufferCapacityField); 3448 return ret; 3449 } 3450 3451 3452 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3453 JNIWrapper("GetVersion"); 3454 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3455 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3456 return CurrentVersion; 3457 JNI_END 3458 3459 extern struct JavaVM_ main_vm; 3460 3461 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3462 JNIWrapper("jni_GetJavaVM"); 3463 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3464 *vm = (JavaVM *)(&main_vm); 3465 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3466 return JNI_OK; 3467 JNI_END 3468 3469 3470 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3471 JNIWrapper("GetModule"); 3472 return Modules::get_module(clazz, THREAD); 3473 JNI_END 3474 3475 3476 // Structure containing all jni functions 3477 struct JNINativeInterface_ jni_NativeInterface = { 3478 NULL, 3479 NULL, 3480 NULL, 3481 3482 NULL, 3483 3484 jni_GetVersion, 3485 3486 jni_DefineClass, 3487 jni_FindClass, 3488 3489 jni_FromReflectedMethod, 3490 jni_FromReflectedField, 3491 3492 jni_ToReflectedMethod, 3493 3494 jni_GetSuperclass, 3495 jni_IsAssignableFrom, 3496 3497 jni_ToReflectedField, 3498 3499 jni_Throw, 3500 jni_ThrowNew, 3501 jni_ExceptionOccurred, 3502 jni_ExceptionDescribe, 3503 jni_ExceptionClear, 3504 jni_FatalError, 3505 3506 jni_PushLocalFrame, 3507 jni_PopLocalFrame, 3508 3509 jni_NewGlobalRef, 3510 jni_DeleteGlobalRef, 3511 jni_DeleteLocalRef, 3512 jni_IsSameObject, 3513 3514 jni_NewLocalRef, 3515 jni_EnsureLocalCapacity, 3516 3517 jni_AllocObject, 3518 jni_NewObject, 3519 jni_NewObjectV, 3520 jni_NewObjectA, 3521 3522 jni_GetObjectClass, 3523 jni_IsInstanceOf, 3524 3525 jni_GetMethodID, 3526 3527 jni_CallObjectMethod, 3528 jni_CallObjectMethodV, 3529 jni_CallObjectMethodA, 3530 jni_CallBooleanMethod, 3531 jni_CallBooleanMethodV, 3532 jni_CallBooleanMethodA, 3533 jni_CallByteMethod, 3534 jni_CallByteMethodV, 3535 jni_CallByteMethodA, 3536 jni_CallCharMethod, 3537 jni_CallCharMethodV, 3538 jni_CallCharMethodA, 3539 jni_CallShortMethod, 3540 jni_CallShortMethodV, 3541 jni_CallShortMethodA, 3542 jni_CallIntMethod, 3543 jni_CallIntMethodV, 3544 jni_CallIntMethodA, 3545 jni_CallLongMethod, 3546 jni_CallLongMethodV, 3547 jni_CallLongMethodA, 3548 jni_CallFloatMethod, 3549 jni_CallFloatMethodV, 3550 jni_CallFloatMethodA, 3551 jni_CallDoubleMethod, 3552 jni_CallDoubleMethodV, 3553 jni_CallDoubleMethodA, 3554 jni_CallVoidMethod, 3555 jni_CallVoidMethodV, 3556 jni_CallVoidMethodA, 3557 3558 jni_CallNonvirtualObjectMethod, 3559 jni_CallNonvirtualObjectMethodV, 3560 jni_CallNonvirtualObjectMethodA, 3561 jni_CallNonvirtualBooleanMethod, 3562 jni_CallNonvirtualBooleanMethodV, 3563 jni_CallNonvirtualBooleanMethodA, 3564 jni_CallNonvirtualByteMethod, 3565 jni_CallNonvirtualByteMethodV, 3566 jni_CallNonvirtualByteMethodA, 3567 jni_CallNonvirtualCharMethod, 3568 jni_CallNonvirtualCharMethodV, 3569 jni_CallNonvirtualCharMethodA, 3570 jni_CallNonvirtualShortMethod, 3571 jni_CallNonvirtualShortMethodV, 3572 jni_CallNonvirtualShortMethodA, 3573 jni_CallNonvirtualIntMethod, 3574 jni_CallNonvirtualIntMethodV, 3575 jni_CallNonvirtualIntMethodA, 3576 jni_CallNonvirtualLongMethod, 3577 jni_CallNonvirtualLongMethodV, 3578 jni_CallNonvirtualLongMethodA, 3579 jni_CallNonvirtualFloatMethod, 3580 jni_CallNonvirtualFloatMethodV, 3581 jni_CallNonvirtualFloatMethodA, 3582 jni_CallNonvirtualDoubleMethod, 3583 jni_CallNonvirtualDoubleMethodV, 3584 jni_CallNonvirtualDoubleMethodA, 3585 jni_CallNonvirtualVoidMethod, 3586 jni_CallNonvirtualVoidMethodV, 3587 jni_CallNonvirtualVoidMethodA, 3588 3589 jni_GetFieldID, 3590 3591 jni_GetObjectField, 3592 jni_GetBooleanField, 3593 jni_GetByteField, 3594 jni_GetCharField, 3595 jni_GetShortField, 3596 jni_GetIntField, 3597 jni_GetLongField, 3598 jni_GetFloatField, 3599 jni_GetDoubleField, 3600 3601 jni_SetObjectField, 3602 jni_SetBooleanField, 3603 jni_SetByteField, 3604 jni_SetCharField, 3605 jni_SetShortField, 3606 jni_SetIntField, 3607 jni_SetLongField, 3608 jni_SetFloatField, 3609 jni_SetDoubleField, 3610 3611 jni_GetStaticMethodID, 3612 3613 jni_CallStaticObjectMethod, 3614 jni_CallStaticObjectMethodV, 3615 jni_CallStaticObjectMethodA, 3616 jni_CallStaticBooleanMethod, 3617 jni_CallStaticBooleanMethodV, 3618 jni_CallStaticBooleanMethodA, 3619 jni_CallStaticByteMethod, 3620 jni_CallStaticByteMethodV, 3621 jni_CallStaticByteMethodA, 3622 jni_CallStaticCharMethod, 3623 jni_CallStaticCharMethodV, 3624 jni_CallStaticCharMethodA, 3625 jni_CallStaticShortMethod, 3626 jni_CallStaticShortMethodV, 3627 jni_CallStaticShortMethodA, 3628 jni_CallStaticIntMethod, 3629 jni_CallStaticIntMethodV, 3630 jni_CallStaticIntMethodA, 3631 jni_CallStaticLongMethod, 3632 jni_CallStaticLongMethodV, 3633 jni_CallStaticLongMethodA, 3634 jni_CallStaticFloatMethod, 3635 jni_CallStaticFloatMethodV, 3636 jni_CallStaticFloatMethodA, 3637 jni_CallStaticDoubleMethod, 3638 jni_CallStaticDoubleMethodV, 3639 jni_CallStaticDoubleMethodA, 3640 jni_CallStaticVoidMethod, 3641 jni_CallStaticVoidMethodV, 3642 jni_CallStaticVoidMethodA, 3643 3644 jni_GetStaticFieldID, 3645 3646 jni_GetStaticObjectField, 3647 jni_GetStaticBooleanField, 3648 jni_GetStaticByteField, 3649 jni_GetStaticCharField, 3650 jni_GetStaticShortField, 3651 jni_GetStaticIntField, 3652 jni_GetStaticLongField, 3653 jni_GetStaticFloatField, 3654 jni_GetStaticDoubleField, 3655 3656 jni_SetStaticObjectField, 3657 jni_SetStaticBooleanField, 3658 jni_SetStaticByteField, 3659 jni_SetStaticCharField, 3660 jni_SetStaticShortField, 3661 jni_SetStaticIntField, 3662 jni_SetStaticLongField, 3663 jni_SetStaticFloatField, 3664 jni_SetStaticDoubleField, 3665 3666 jni_NewString, 3667 jni_GetStringLength, 3668 jni_GetStringChars, 3669 jni_ReleaseStringChars, 3670 3671 jni_NewStringUTF, 3672 jni_GetStringUTFLength, 3673 jni_GetStringUTFChars, 3674 jni_ReleaseStringUTFChars, 3675 3676 jni_GetArrayLength, 3677 3678 jni_NewObjectArray, 3679 jni_GetObjectArrayElement, 3680 jni_SetObjectArrayElement, 3681 3682 jni_NewBooleanArray, 3683 jni_NewByteArray, 3684 jni_NewCharArray, 3685 jni_NewShortArray, 3686 jni_NewIntArray, 3687 jni_NewLongArray, 3688 jni_NewFloatArray, 3689 jni_NewDoubleArray, 3690 3691 jni_GetBooleanArrayElements, 3692 jni_GetByteArrayElements, 3693 jni_GetCharArrayElements, 3694 jni_GetShortArrayElements, 3695 jni_GetIntArrayElements, 3696 jni_GetLongArrayElements, 3697 jni_GetFloatArrayElements, 3698 jni_GetDoubleArrayElements, 3699 3700 jni_ReleaseBooleanArrayElements, 3701 jni_ReleaseByteArrayElements, 3702 jni_ReleaseCharArrayElements, 3703 jni_ReleaseShortArrayElements, 3704 jni_ReleaseIntArrayElements, 3705 jni_ReleaseLongArrayElements, 3706 jni_ReleaseFloatArrayElements, 3707 jni_ReleaseDoubleArrayElements, 3708 3709 jni_GetBooleanArrayRegion, 3710 jni_GetByteArrayRegion, 3711 jni_GetCharArrayRegion, 3712 jni_GetShortArrayRegion, 3713 jni_GetIntArrayRegion, 3714 jni_GetLongArrayRegion, 3715 jni_GetFloatArrayRegion, 3716 jni_GetDoubleArrayRegion, 3717 3718 jni_SetBooleanArrayRegion, 3719 jni_SetByteArrayRegion, 3720 jni_SetCharArrayRegion, 3721 jni_SetShortArrayRegion, 3722 jni_SetIntArrayRegion, 3723 jni_SetLongArrayRegion, 3724 jni_SetFloatArrayRegion, 3725 jni_SetDoubleArrayRegion, 3726 3727 jni_RegisterNatives, 3728 jni_UnregisterNatives, 3729 3730 jni_MonitorEnter, 3731 jni_MonitorExit, 3732 3733 jni_GetJavaVM, 3734 3735 jni_GetStringRegion, 3736 jni_GetStringUTFRegion, 3737 3738 jni_GetPrimitiveArrayCritical, 3739 jni_ReleasePrimitiveArrayCritical, 3740 3741 jni_GetStringCritical, 3742 jni_ReleaseStringCritical, 3743 3744 jni_NewWeakGlobalRef, 3745 jni_DeleteWeakGlobalRef, 3746 3747 jni_ExceptionCheck, 3748 3749 jni_NewDirectByteBuffer, 3750 jni_GetDirectBufferAddress, 3751 jni_GetDirectBufferCapacity, 3752 3753 // New 1_6 features 3754 3755 jni_GetObjectRefType, 3756 3757 // Module features 3758 3759 jni_GetModule 3760 }; 3761 3762 3763 // For jvmti use to modify jni function table. 3764 // Java threads in native contiues to run until it is transitioned 3765 // to VM at safepoint. Before the transition or before it is blocked 3766 // for safepoint it may access jni function table. VM could crash if 3767 // any java thread access the jni function table in the middle of memcpy. 3768 // To avoid this each function pointers are copied automically. 3769 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3770 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3771 intptr_t *a = (intptr_t *) jni_functions(); 3772 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3773 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3774 Atomic::store(*b++, a++); 3775 } 3776 } 3777 3778 void quicken_jni_functions() { 3779 // Replace Get<Primitive>Field with fast versions 3780 if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) { 3781 address func; 3782 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3783 if (func != (address)-1) { 3784 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3785 } 3786 func = JNI_FastGetField::generate_fast_get_byte_field(); 3787 if (func != (address)-1) { 3788 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3789 } 3790 func = JNI_FastGetField::generate_fast_get_char_field(); 3791 if (func != (address)-1) { 3792 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3793 } 3794 func = JNI_FastGetField::generate_fast_get_short_field(); 3795 if (func != (address)-1) { 3796 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3797 } 3798 func = JNI_FastGetField::generate_fast_get_int_field(); 3799 if (func != (address)-1) { 3800 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3801 } 3802 func = JNI_FastGetField::generate_fast_get_long_field(); 3803 if (func != (address)-1) { 3804 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3805 } 3806 func = JNI_FastGetField::generate_fast_get_float_field(); 3807 if (func != (address)-1) { 3808 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3809 } 3810 func = JNI_FastGetField::generate_fast_get_double_field(); 3811 if (func != (address)-1) { 3812 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3813 } 3814 } 3815 } 3816 3817 // Returns the function structure 3818 struct JNINativeInterface_* jni_functions() { 3819 #if INCLUDE_JNI_CHECK 3820 if (CheckJNICalls) return jni_functions_check(); 3821 #endif // INCLUDE_JNI_CHECK 3822 return &jni_NativeInterface; 3823 } 3824 3825 // Returns the function structure 3826 struct JNINativeInterface_* jni_functions_nocheck() { 3827 return &jni_NativeInterface; 3828 } 3829 3830 static void post_thread_start_event(const JavaThread* jt) { 3831 assert(jt != NULL, "invariant"); 3832 EventThreadStart event; 3833 if (event.should_commit()) { 3834 event.set_thread(JFR_THREAD_ID(jt)); 3835 event.commit(); 3836 } 3837 } 3838 3839 // Invocation API 3840 3841 3842 // Forward declaration 3843 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3844 3845 // Global invocation API vars 3846 volatile int vm_created = 0; 3847 // Indicate whether it is safe to recreate VM 3848 volatile int safe_to_recreate_vm = 1; 3849 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3850 3851 3852 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3853 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3854 3855 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3856 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3857 3858 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3859 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3860 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3861 jint ret = JNI_ERR; 3862 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3863 3864 if (Threads::is_supported_jni_version(args->version)) { 3865 ret = JNI_OK; 3866 } 3867 // 1.1 style no longer supported in hotspot. 3868 // According the JNI spec, we should update args->version on return. 3869 // We also use the structure to communicate with launcher about default 3870 // stack size. 3871 if (args->version == JNI_VERSION_1_1) { 3872 args->version = JNI_VERSION_1_2; 3873 // javaStackSize is int in arguments structure 3874 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3875 args->javaStackSize = (jint)(ThreadStackSize * K); 3876 } 3877 return ret; 3878 } 3879 3880 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3881 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3882 3883 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3884 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3885 3886 jint result = JNI_ERR; 3887 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3888 3889 // We're about to use Atomic::xchg for synchronization. Some Zero 3890 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3891 // but __sync_lock_test_and_set is not guaranteed to do what we want 3892 // on all architectures. So we check it works before relying on it. 3893 #if defined(ZERO) && defined(ASSERT) 3894 { 3895 jint a = 0xcafebabe; 3896 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3897 void *c = &a; 3898 void *d = Atomic::xchg(&b, &c); 3899 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3900 assert(c == &b && d == &a, "Atomic::xchg() works"); 3901 } 3902 #endif // ZERO && ASSERT 3903 3904 // At the moment it's only possible to have one Java VM, 3905 // since some of the runtime state is in global variables. 3906 3907 // We cannot use our mutex locks here, since they only work on 3908 // Threads. We do an atomic compare and exchange to ensure only 3909 // one thread can call this method at a time 3910 3911 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3912 // the add/dec implementations are dependent on whether we are running 3913 // on a multiprocessor Atomic::xchg does not have this problem. 3914 if (Atomic::xchg(1, &vm_created) == 1) { 3915 return JNI_EEXIST; // already created, or create attempt in progress 3916 } 3917 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3918 return JNI_ERR; // someone tried and failed and retry not allowed. 3919 } 3920 3921 assert(vm_created == 1, "vm_created is true during the creation"); 3922 3923 /** 3924 * Certain errors during initialization are recoverable and do not 3925 * prevent this method from being called again at a later time 3926 * (perhaps with different arguments). However, at a certain 3927 * point during initialization if an error occurs we cannot allow 3928 * this function to be called again (or it will crash). In those 3929 * situations, the 'canTryAgain' flag is set to false, which atomically 3930 * sets safe_to_recreate_vm to 1, such that any new call to 3931 * JNI_CreateJavaVM will immediately fail using the above logic. 3932 */ 3933 bool can_try_again = true; 3934 3935 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3936 if (result == JNI_OK) { 3937 JavaThread *thread = JavaThread::current(); 3938 assert(!thread->has_pending_exception(), "should have returned not OK"); 3939 /* thread is thread_in_vm here */ 3940 *vm = (JavaVM *)(&main_vm); 3941 *(JNIEnv**)penv = thread->jni_environment(); 3942 3943 #if INCLUDE_JVMCI 3944 if (EnableJVMCI) { 3945 if (UseJVMCICompiler) { 3946 // JVMCI is initialized on a CompilerThread 3947 if (BootstrapJVMCI) { 3948 JavaThread* THREAD = thread; 3949 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3950 compiler->bootstrap(THREAD); 3951 if (HAS_PENDING_EXCEPTION) { 3952 HandleMark hm; 3953 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3954 } 3955 } 3956 } 3957 } 3958 #endif 3959 3960 // Notify JVMTI 3961 if (JvmtiExport::should_post_thread_life()) { 3962 JvmtiExport::post_thread_start(thread); 3963 } 3964 3965 post_thread_start_event(thread); 3966 3967 #ifndef PRODUCT 3968 if (ReplayCompiles) ciReplay::replay(thread); 3969 3970 // Some platforms (like Win*) need a wrapper around these test 3971 // functions in order to properly handle error conditions. 3972 VMError::test_error_handler(); 3973 #endif 3974 3975 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3976 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3977 } else { 3978 // If create_vm exits because of a pending exception, exit with that 3979 // exception. In the future when we figure out how to reclaim memory, 3980 // we may be able to exit with JNI_ERR and allow the calling application 3981 // to continue. 3982 if (Universe::is_fully_initialized()) { 3983 // otherwise no pending exception possible - VM will already have aborted 3984 JavaThread* THREAD = JavaThread::current(); 3985 if (HAS_PENDING_EXCEPTION) { 3986 HandleMark hm; 3987 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3988 } 3989 } 3990 3991 if (can_try_again) { 3992 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3993 safe_to_recreate_vm = 1; 3994 } 3995 3996 // Creation failed. We must reset vm_created 3997 *vm = 0; 3998 *(JNIEnv**)penv = 0; 3999 // reset vm_created last to avoid race condition. Use OrderAccess to 4000 // control both compiler and architectural-based reordering. 4001 OrderAccess::release_store(&vm_created, 0); 4002 } 4003 4004 // Flush stdout and stderr before exit. 4005 fflush(stdout); 4006 fflush(stderr); 4007 4008 return result; 4009 4010 } 4011 4012 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4013 jint result = JNI_ERR; 4014 // On Windows, let CreateJavaVM run with SEH protection 4015 #ifdef _WIN32 4016 __try { 4017 #endif 4018 result = JNI_CreateJavaVM_inner(vm, penv, args); 4019 #ifdef _WIN32 4020 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4021 // Nothing to do. 4022 } 4023 #endif 4024 return result; 4025 } 4026 4027 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4028 // See bug 4367188, the wrapper can sometimes cause VM crashes 4029 // JNIWrapper("GetCreatedJavaVMs"); 4030 4031 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4032 4033 if (vm_created == 1) { 4034 if (numVMs != NULL) *numVMs = 1; 4035 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4036 } else { 4037 if (numVMs != NULL) *numVMs = 0; 4038 } 4039 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4040 return JNI_OK; 4041 } 4042 4043 extern "C" { 4044 4045 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4046 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4047 4048 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4049 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4050 jint res = JNI_ERR; 4051 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4052 4053 if (vm_created == 0) { 4054 res = JNI_ERR; 4055 return res; 4056 } 4057 4058 JNIWrapper("DestroyJavaVM"); 4059 JNIEnv *env; 4060 JavaVMAttachArgs destroyargs; 4061 destroyargs.version = CurrentVersion; 4062 destroyargs.name = (char *)"DestroyJavaVM"; 4063 destroyargs.group = NULL; 4064 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4065 if (res != JNI_OK) { 4066 return res; 4067 } 4068 4069 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4070 JavaThread* thread = JavaThread::current(); 4071 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4072 if (Threads::destroy_vm()) { 4073 // Should not change thread state, VM is gone 4074 vm_created = 0; 4075 res = JNI_OK; 4076 return res; 4077 } else { 4078 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4079 res = JNI_ERR; 4080 return res; 4081 } 4082 } 4083 4084 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4085 jint result = JNI_ERR; 4086 // On Windows, we need SEH protection 4087 #ifdef _WIN32 4088 __try { 4089 #endif 4090 result = jni_DestroyJavaVM_inner(vm); 4091 #ifdef _WIN32 4092 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4093 // Nothing to do. 4094 } 4095 #endif 4096 return result; 4097 } 4098 4099 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4100 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4101 4102 // Check below commented out from JDK1.2fcs as well 4103 /* 4104 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4105 return JNI_EVERSION; 4106 } 4107 */ 4108 4109 Thread* t = Thread::current_or_null(); 4110 if (t != NULL) { 4111 // If the thread has been attached this operation is a no-op 4112 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4113 return JNI_OK; 4114 } 4115 4116 // Create a thread and mark it as attaching so it will be skipped by the 4117 // ThreadsListEnumerator - see CR 6404306 4118 JavaThread* thread = new JavaThread(true); 4119 4120 // Set correct safepoint info. The thread is going to call into Java when 4121 // initializing the Java level thread object. Hence, the correct state must 4122 // be set in order for the Safepoint code to deal with it correctly. 4123 thread->set_thread_state(_thread_in_vm); 4124 thread->record_stack_base_and_size(); 4125 thread->register_thread_stack_with_NMT(); 4126 thread->initialize_thread_current(); 4127 4128 if (!os::create_attached_thread(thread)) { 4129 thread->smr_delete(); 4130 return JNI_ERR; 4131 } 4132 // Enable stack overflow checks 4133 thread->create_stack_guard_pages(); 4134 4135 thread->initialize_tlab(); 4136 4137 thread->cache_global_variables(); 4138 4139 // This thread will not do a safepoint check, since it has 4140 // not been added to the Thread list yet. 4141 { MutexLocker ml(Threads_lock); 4142 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4143 // avoid this thread trying to do a GC before it is added to the thread-list 4144 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4145 Threads::add(thread, daemon); 4146 // Avoid pushing frames with ea based optimizations while deoptimization is in progress 4147 while (JVMTIEscapeBarrier::deoptimizing_objects_for_all_threads()) { 4148 Threads_lock->wait(); 4149 } 4150 } 4151 // Create thread group and name info from attach arguments 4152 oop group = NULL; 4153 char* thread_name = NULL; 4154 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4155 group = JNIHandles::resolve(args->group); 4156 thread_name = args->name; // may be NULL 4157 } 4158 if (group == NULL) group = Universe::main_thread_group(); 4159 4160 // Create Java level thread object and attach it to this thread 4161 bool attach_failed = false; 4162 { 4163 EXCEPTION_MARK; 4164 HandleMark hm(THREAD); 4165 Handle thread_group(THREAD, group); 4166 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4167 if (HAS_PENDING_EXCEPTION) { 4168 CLEAR_PENDING_EXCEPTION; 4169 // cleanup outside the handle mark. 4170 attach_failed = true; 4171 } 4172 } 4173 4174 if (attach_failed) { 4175 // Added missing cleanup 4176 thread->cleanup_failed_attach_current_thread(daemon); 4177 return JNI_ERR; 4178 } 4179 4180 // mark the thread as no longer attaching 4181 // this uses a fence to push the change through so we don't have 4182 // to regrab the threads_lock 4183 thread->set_done_attaching_via_jni(); 4184 4185 // Set java thread status. 4186 java_lang_Thread::set_thread_status(thread->threadObj(), 4187 java_lang_Thread::RUNNABLE); 4188 4189 // Notify the debugger 4190 if (JvmtiExport::should_post_thread_life()) { 4191 JvmtiExport::post_thread_start(thread); 4192 } 4193 4194 post_thread_start_event(thread); 4195 4196 *(JNIEnv**)penv = thread->jni_environment(); 4197 4198 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4199 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4200 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4201 // needed. 4202 4203 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4204 4205 // Perform any platform dependent FPU setup 4206 os::setup_fpu(); 4207 4208 return JNI_OK; 4209 } 4210 4211 4212 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4213 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4214 if (vm_created == 0) { 4215 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4216 return JNI_ERR; 4217 } 4218 4219 JNIWrapper("AttachCurrentThread"); 4220 jint ret = attach_current_thread(vm, penv, _args, false); 4221 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4222 return ret; 4223 } 4224 4225 4226 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4227 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4228 4229 JNIWrapper("DetachCurrentThread"); 4230 4231 // If the thread has already been detached the operation is a no-op 4232 if (Thread::current_or_null() == NULL) { 4233 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4234 return JNI_OK; 4235 } 4236 4237 VM_Exit::block_if_vm_exited(); 4238 4239 JavaThread* thread = JavaThread::current(); 4240 if (thread->has_last_Java_frame()) { 4241 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4242 // Can't detach a thread that's running java, that can't work. 4243 return JNI_ERR; 4244 } 4245 4246 // Safepoint support. Have to do call-back to safepoint code, if in the 4247 // middle of a safepoint operation 4248 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4249 4250 // XXX: Note that JavaThread::exit() call below removes the guards on the 4251 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4252 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4253 // of the guards is visible in jni_AttachCurrentThread above, 4254 // the removal of the guards is buried below in JavaThread::exit() 4255 // here. The abstraction should be more symmetrically either exposed 4256 // or hidden (e.g. it could probably be hidden in the same 4257 // (platform-dependent) methods where we do alternate stack 4258 // maintenance work?) 4259 thread->exit(false, JavaThread::jni_detach); 4260 thread->smr_delete(); 4261 4262 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4263 return JNI_OK; 4264 } 4265 4266 DT_RETURN_MARK_DECL(GetEnv, jint 4267 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4268 4269 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4270 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4271 jint ret = JNI_ERR; 4272 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4273 4274 if (vm_created == 0) { 4275 *penv = NULL; 4276 ret = JNI_EDETACHED; 4277 return ret; 4278 } 4279 4280 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4281 return ret; 4282 } 4283 4284 #ifndef JVMPI_VERSION_1 4285 // need these in order to be polite about older agents 4286 #define JVMPI_VERSION_1 ((jint)0x10000001) 4287 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4288 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4289 #endif // !JVMPI_VERSION_1 4290 4291 Thread* thread = Thread::current_or_null(); 4292 if (thread != NULL && thread->is_Java_thread()) { 4293 if (Threads::is_supported_jni_version_including_1_1(version)) { 4294 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4295 ret = JNI_OK; 4296 return ret; 4297 4298 } else if (version == JVMPI_VERSION_1 || 4299 version == JVMPI_VERSION_1_1 || 4300 version == JVMPI_VERSION_1_2) { 4301 tty->print_cr("ERROR: JVMPI, an experimental interface, 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 if (JvmtiExport::is_jvmdi_version(version)) { 4306 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4307 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4308 ret = JNI_EVERSION; 4309 return ret; 4310 } else { 4311 *penv = NULL; 4312 ret = JNI_EVERSION; 4313 return ret; 4314 } 4315 } else { 4316 *penv = NULL; 4317 ret = JNI_EDETACHED; 4318 return ret; 4319 } 4320 } 4321 4322 4323 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4324 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4325 if (vm_created == 0) { 4326 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4327 return JNI_ERR; 4328 } 4329 4330 JNIWrapper("AttachCurrentThreadAsDaemon"); 4331 jint ret = attach_current_thread(vm, penv, _args, true); 4332 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4333 return ret; 4334 } 4335 4336 4337 } // End extern "C" 4338 4339 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4340 NULL, 4341 NULL, 4342 NULL, 4343 4344 jni_DestroyJavaVM, 4345 jni_AttachCurrentThread, 4346 jni_DetachCurrentThread, 4347 jni_GetEnv, 4348 jni_AttachCurrentThreadAsDaemon 4349 };