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/markOop.hpp" 54 #include "oops/method.hpp" 55 #include "oops/objArrayKlass.hpp" 56 #include "oops/objArrayOop.inline.hpp" 57 #include "oops/oop.inline.hpp" 58 #include "oops/symbol.hpp" 59 #include "oops/typeArrayKlass.hpp" 60 #include "oops/typeArrayOop.inline.hpp" 61 #include "prims/jniCheck.hpp" 62 #include "prims/jniExport.hpp" 63 #include "prims/jniFastGetField.hpp" 64 #include "prims/jvm_misc.hpp" 65 #include "prims/jvmtiExport.hpp" 66 #include "prims/jvmtiThreadState.hpp" 67 #include "runtime/atomic.hpp" 68 #include "runtime/compilationPolicy.hpp" 69 #include "runtime/fieldDescriptor.inline.hpp" 70 #include "runtime/handles.inline.hpp" 71 #include "runtime/interfaceSupport.inline.hpp" 72 #include "runtime/java.hpp" 73 #include "runtime/javaCalls.hpp" 74 #include "runtime/jfieldIDWorkaround.hpp" 75 #include "runtime/jniHandles.inline.hpp" 76 #include "runtime/orderAccess.hpp" 77 #include "runtime/reflection.hpp" 78 #include "runtime/safepointVerifiers.hpp" 79 #include "runtime/sharedRuntime.hpp" 80 #include "runtime/signature.hpp" 81 #include "runtime/thread.inline.hpp" 82 #include "runtime/vmOperations.hpp" 83 #include "services/memTracker.hpp" 84 #include "services/runtimeService.hpp" 85 #include "utilities/defaultStream.hpp" 86 #include "utilities/dtrace.hpp" 87 #include "utilities/events.hpp" 88 #include "utilities/histogram.hpp" 89 #include "utilities/macros.hpp" 90 #include "utilities/vmError.hpp" 91 #if INCLUDE_JVMCI 92 #include "jvmci/jvmciCompiler.hpp" 93 #include "jvmci/jvmciRuntime.hpp" 94 #endif 95 96 static jint CurrentVersion = JNI_VERSION_10; 97 98 #ifdef _WIN32 99 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 100 #endif 101 102 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 103 // '-return' probe regardless of the return path is taken out of the function. 104 // Methods that have multiple return paths use this to avoid having to 105 // instrument each return path. Methods that use CHECK or THROW must use this 106 // since those macros can cause an immedate uninstrumented return. 107 // 108 // In order to get the return value, a reference to the variable containing 109 // the return value must be passed to the contructor of the object, and 110 // the return value must be set before return (since the mark object has 111 // a reference to it). 112 // 113 // Example: 114 // DT_RETURN_MARK_DECL(SomeFunc, int); 115 // JNI_ENTRY(int, SomeFunc, ...) 116 // int return_value = 0; 117 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 118 // foo(CHECK_0) 119 // return_value = 5; 120 // return return_value; 121 // JNI_END 122 #define DT_RETURN_MARK_DECL(name, type, probe) \ 123 DTRACE_ONLY( \ 124 class DTraceReturnProbeMark_##name { \ 125 public: \ 126 const type& _ret_ref; \ 127 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 128 ~DTraceReturnProbeMark_##name() { \ 129 probe; \ 130 } \ 131 } \ 132 ) 133 // Void functions are simpler since there's no return value 134 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 135 DTRACE_ONLY( \ 136 class DTraceReturnProbeMark_##name { \ 137 public: \ 138 ~DTraceReturnProbeMark_##name() { \ 139 probe; \ 140 } \ 141 } \ 142 ) 143 144 // Place these macros in the function to mark the return. Non-void 145 // functions need the type and address of the return value. 146 #define DT_RETURN_MARK(name, type, ref) \ 147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 148 #define DT_VOID_RETURN_MARK(name) \ 149 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 150 151 152 // Use these to select distinct code for floating-point vs. non-floating point 153 // situations. Used from within common macros where we need slightly 154 // different behavior for Float/Double 155 #define FP_SELECT_Boolean(intcode, fpcode) intcode 156 #define FP_SELECT_Byte(intcode, fpcode) intcode 157 #define FP_SELECT_Char(intcode, fpcode) intcode 158 #define FP_SELECT_Short(intcode, fpcode) intcode 159 #define FP_SELECT_Object(intcode, fpcode) intcode 160 #define FP_SELECT_Int(intcode, fpcode) intcode 161 #define FP_SELECT_Long(intcode, fpcode) intcode 162 #define FP_SELECT_Float(intcode, fpcode) fpcode 163 #define FP_SELECT_Double(intcode, fpcode) fpcode 164 #define FP_SELECT(TypeName, intcode, fpcode) \ 165 FP_SELECT_##TypeName(intcode, fpcode) 166 167 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 168 // (dtrace doesn't do FP yet) 169 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 170 FP_SELECT(TypeName, \ 171 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 172 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 173 FP_SELECT(TypeName, \ 174 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 175 176 177 // out-of-line helpers for class jfieldIDWorkaround: 178 179 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 180 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 181 uintptr_t as_uint = (uintptr_t) id; 182 intptr_t offset = raw_instance_offset(id); 183 if (is_checked_jfieldID(id)) { 184 if (!klass_hash_ok(k, id)) { 185 return false; 186 } 187 } 188 return InstanceKlass::cast(k)->contains_field_offset(offset); 189 } else { 190 JNIid* result = (JNIid*) id; 191 #ifdef ASSERT 192 return result != NULL && result->is_static_field_id(); 193 #else 194 return result != NULL; 195 #endif 196 } 197 } 198 199 200 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 201 if (offset <= small_offset_mask) { 202 Klass* field_klass = k; 203 Klass* super_klass = field_klass->super(); 204 // With compressed oops the most super class with nonstatic fields would 205 // be the owner of fields embedded in the header. 206 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 207 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 208 field_klass = super_klass; // super contains the field also 209 super_klass = field_klass->super(); 210 } 211 debug_only(NoSafepointVerifier nosafepoint;) 212 uintptr_t klass_hash = field_klass->identity_hash(); 213 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 214 } else { 215 #if 0 216 #ifndef PRODUCT 217 { 218 ResourceMark rm; 219 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 220 } 221 #endif 222 #endif 223 return 0; 224 } 225 } 226 227 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 228 uintptr_t as_uint = (uintptr_t) id; 229 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 230 do { 231 debug_only(NoSafepointVerifier nosafepoint;) 232 // Could use a non-blocking query for identity_hash here... 233 if ((k->identity_hash() & klass_mask) == klass_hash) 234 return true; 235 k = k->super(); 236 } while (k != NULL); 237 return false; 238 } 239 240 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 241 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 242 uintptr_t as_uint = (uintptr_t) id; 243 intptr_t offset = raw_instance_offset(id); 244 if (VerifyJNIFields) { 245 if (is_checked_jfieldID(id)) { 246 guarantee(klass_hash_ok(k, id), 247 "Bug in native code: jfieldID class must match object"); 248 } else { 249 #if 0 250 #ifndef PRODUCT 251 if (Verbose) { 252 ResourceMark rm; 253 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 254 } 255 #endif 256 #endif 257 } 258 } 259 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 260 "Bug in native code: jfieldID offset must address interior of object"); 261 } 262 263 // Wrapper to trace JNI functions 264 265 #ifdef ASSERT 266 Histogram* JNIHistogram; 267 static volatile int JNIHistogram_lock = 0; 268 269 class JNIHistogramElement : public HistogramElement { 270 public: 271 JNIHistogramElement(const char* name); 272 }; 273 274 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 275 _name = elementName; 276 uintx count = 0; 277 278 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 279 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 280 count +=1; 281 if ( (WarnOnStalledSpinLock > 0) 282 && (count % WarnOnStalledSpinLock == 0)) { 283 warning("JNIHistogram_lock seems to be stalled"); 284 } 285 } 286 } 287 288 289 if(JNIHistogram == NULL) 290 JNIHistogram = new Histogram("JNI Call Counts",100); 291 292 JNIHistogram->add_element(this); 293 Atomic::dec(&JNIHistogram_lock); 294 } 295 296 #define JNICountWrapper(arg) \ 297 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 298 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 299 if (e != NULL) e->increment_count() 300 #define JNIWrapper(arg) JNICountWrapper(arg); 301 #else 302 #define JNIWrapper(arg) 303 #endif 304 305 306 // Implementation of JNI entries 307 308 DT_RETURN_MARK_DECL(DefineClass, jclass 309 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 310 311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 312 const jbyte *buf, jsize bufLen)) 313 JNIWrapper("DefineClass"); 314 315 HOTSPOT_JNI_DEFINECLASS_ENTRY( 316 env, (char*) name, loaderRef, (char*) buf, bufLen); 317 318 jclass cls = NULL; 319 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 320 321 TempNewSymbol class_name = NULL; 322 // Since exceptions can be thrown, class initialization can take place 323 // if name is NULL no check for class name in .class stream has to be made. 324 if (name != NULL) { 325 const int str_len = (int)strlen(name); 326 if (str_len > Symbol::max_length()) { 327 // It's impossible to create this class; the name cannot fit 328 // into the constant pool. 329 Exceptions::fthrow(THREAD_AND_LOCATION, 330 vmSymbols::java_lang_NoClassDefFoundError(), 331 "Class name exceeds maximum length of %d: %s", 332 Symbol::max_length(), 333 name); 334 return 0; 335 } 336 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 337 } 338 ResourceMark rm(THREAD); 339 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 340 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 341 342 if (UsePerfData && !class_loader.is_null()) { 343 // check whether the current caller thread holds the lock or not. 344 // If not, increment the corresponding counter 345 if (ObjectSynchronizer:: 346 query_lock_ownership((JavaThread*)THREAD, class_loader) != 347 ObjectSynchronizer::owner_self) { 348 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 349 } 350 } 351 Klass* k = SystemDictionary::resolve_from_stream(class_name, 352 class_loader, 353 Handle(), 354 &st, 355 CHECK_NULL); 356 357 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 358 trace_class_resolution(k); 359 } 360 361 cls = (jclass)JNIHandles::make_local( 362 env, k->java_mirror()); 363 return cls; 364 JNI_END 365 366 367 368 DT_RETURN_MARK_DECL(FindClass, jclass 369 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 370 371 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 372 JNIWrapper("FindClass"); 373 374 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 375 376 jclass result = NULL; 377 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 378 379 // Sanity check the name: it cannot be null or larger than the maximum size 380 // name we can fit in the constant pool. 381 if (name == NULL) { 382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 383 } 384 if ((int)strlen(name) > Symbol::max_length()) { 385 Exceptions::fthrow(THREAD_AND_LOCATION, 386 vmSymbols::java_lang_NoClassDefFoundError(), 387 "Class name exceeds maximum length of %d: %s", 388 Symbol::max_length(), 389 name); 390 return 0; 391 } 392 393 //%note jni_3 394 Handle protection_domain; 395 // Find calling class 396 Klass* k = thread->security_get_caller_class(0); 397 // default to the system loader when no context 398 Handle loader(THREAD, SystemDictionary::java_system_loader()); 399 if (k != NULL) { 400 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 401 // in the correct class context. 402 if (k->class_loader() == NULL && 403 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 404 JavaValue result(T_OBJECT); 405 JavaCalls::call_static(&result, k, 406 vmSymbols::getFromClass_name(), 407 vmSymbols::void_class_signature(), 408 CHECK_NULL); 409 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 410 // a non-NULL Class object. When invoked from JNI_OnUnload, 411 // it will return NULL to indicate no context. 412 oop mirror = (oop) result.get_jobject(); 413 if (mirror != NULL) { 414 Klass* fromClass = java_lang_Class::as_Klass(mirror); 415 loader = Handle(THREAD, fromClass->class_loader()); 416 protection_domain = Handle(THREAD, fromClass->protection_domain()); 417 } 418 } else { 419 loader = Handle(THREAD, k->class_loader()); 420 } 421 } 422 423 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 424 result = find_class_from_class_loader(env, sym, true, loader, 425 protection_domain, true, thread); 426 427 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 428 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 429 } 430 431 return result; 432 JNI_END 433 434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 436 437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 438 JNIWrapper("FromReflectedMethod"); 439 440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 441 442 jmethodID ret = NULL; 443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 444 445 // method is a handle to a java.lang.reflect.Method object 446 oop reflected = JNIHandles::resolve_non_null(method); 447 oop mirror = NULL; 448 int slot = 0; 449 450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 451 mirror = java_lang_reflect_Constructor::clazz(reflected); 452 slot = java_lang_reflect_Constructor::slot(reflected); 453 } else { 454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 455 mirror = java_lang_reflect_Method::clazz(reflected); 456 slot = java_lang_reflect_Method::slot(reflected); 457 } 458 Klass* k1 = java_lang_Class::as_Klass(mirror); 459 460 // Make sure class is initialized before handing id's out to methods 461 k1->initialize(CHECK_NULL); 462 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 463 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 464 return ret; 465 JNI_END 466 467 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 468 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 469 470 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 471 JNIWrapper("FromReflectedField"); 472 473 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 474 475 jfieldID ret = NULL; 476 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 477 478 // field is a handle to a java.lang.reflect.Field object 479 oop reflected = JNIHandles::resolve_non_null(field); 480 oop mirror = java_lang_reflect_Field::clazz(reflected); 481 Klass* k1 = java_lang_Class::as_Klass(mirror); 482 int slot = java_lang_reflect_Field::slot(reflected); 483 int modifiers = java_lang_reflect_Field::modifiers(reflected); 484 485 // Make sure class is initialized before handing id's out to fields 486 k1->initialize(CHECK_NULL); 487 488 // First check if this is a static field 489 if (modifiers & JVM_ACC_STATIC) { 490 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 491 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 492 assert(id != NULL, "corrupt Field object"); 493 debug_only(id->set_is_static_field_id();) 494 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 495 ret = jfieldIDWorkaround::to_static_jfieldID(id); 496 return ret; 497 } 498 499 // The slot is the index of the field description in the field-array 500 // The jfieldID is the offset of the field within the object 501 // It may also have hash bits for k, if VerifyJNIFields is turned on. 502 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 503 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 504 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 505 return ret; 506 JNI_END 507 508 509 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 510 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 511 512 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 513 JNIWrapper("ToReflectedMethod"); 514 515 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 516 517 jobject ret = NULL; 518 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 519 520 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 521 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 522 oop reflection_method; 523 if (m->is_initializer()) { 524 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 525 } else { 526 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 527 } 528 ret = JNIHandles::make_local(env, reflection_method); 529 return ret; 530 JNI_END 531 532 DT_RETURN_MARK_DECL(GetSuperclass, jclass 533 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 534 535 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 536 JNIWrapper("GetSuperclass"); 537 538 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 539 540 jclass obj = NULL; 541 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 542 543 oop mirror = JNIHandles::resolve_non_null(sub); 544 // primitive classes return NULL 545 if (java_lang_Class::is_primitive(mirror)) return NULL; 546 547 // Rules of Class.getSuperClass as implemented by KLass::java_super: 548 // arrays return Object 549 // interfaces return NULL 550 // proper classes return Klass::super() 551 Klass* k = java_lang_Class::as_Klass(mirror); 552 if (k->is_interface()) return NULL; 553 554 // return mirror for superclass 555 Klass* super = k->java_super(); 556 // super2 is the value computed by the compiler's getSuperClass intrinsic: 557 debug_only(Klass* super2 = ( k->is_array_klass() 558 ? SystemDictionary::Object_klass() 559 : k->super() ) ); 560 assert(super == super2, 561 "java_super computation depends on interface, array, other super"); 562 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 563 return obj; 564 JNI_END 565 566 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 567 JNIWrapper("IsSubclassOf"); 568 569 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 570 571 oop sub_mirror = JNIHandles::resolve_non_null(sub); 572 oop super_mirror = JNIHandles::resolve_non_null(super); 573 if (java_lang_Class::is_primitive(sub_mirror) || 574 java_lang_Class::is_primitive(super_mirror)) { 575 jboolean ret = oopDesc::equals(sub_mirror, super_mirror); 576 577 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 578 return ret; 579 } 580 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 581 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 582 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 583 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 584 JNI_TRUE : JNI_FALSE; 585 586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 587 return ret; 588 JNI_END 589 590 591 DT_RETURN_MARK_DECL(Throw, jint 592 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 593 594 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 595 JNIWrapper("Throw"); 596 597 HOTSPOT_JNI_THROW_ENTRY(env, obj); 598 599 jint ret = JNI_OK; 600 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 601 602 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 603 ShouldNotReachHere(); 604 return 0; // Mute compiler. 605 JNI_END 606 607 608 DT_RETURN_MARK_DECL(ThrowNew, jint 609 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 610 611 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 612 JNIWrapper("ThrowNew"); 613 614 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 615 616 jint ret = JNI_OK; 617 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 618 619 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 620 Symbol* name = k->name(); 621 Handle class_loader (THREAD, k->class_loader()); 622 Handle protection_domain (THREAD, k->protection_domain()); 623 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 624 ShouldNotReachHere(); 625 return 0; // Mute compiler. 626 JNI_END 627 628 629 // JNI functions only transform a pending async exception to a synchronous 630 // exception in ExceptionOccurred and ExceptionCheck calls, since 631 // delivering an async exception in other places won't change the native 632 // code's control flow and would be harmful when native code further calls 633 // JNI functions with a pending exception. Async exception is also checked 634 // during the call, so ExceptionOccurred/ExceptionCheck won't return 635 // false but deliver the async exception at the very end during 636 // state transition. 637 638 static void jni_check_async_exceptions(JavaThread *thread) { 639 assert(thread == Thread::current(), "must be itself"); 640 thread->check_and_handle_async_exceptions(); 641 } 642 643 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 644 JNIWrapper("ExceptionOccurred"); 645 646 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 647 648 jni_check_async_exceptions(thread); 649 oop exception = thread->pending_exception(); 650 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 651 652 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 653 return ret; 654 JNI_END 655 656 657 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 658 JNIWrapper("ExceptionDescribe"); 659 660 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 661 662 if (thread->has_pending_exception()) { 663 Handle ex(thread, thread->pending_exception()); 664 thread->clear_pending_exception(); 665 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 666 // Don't print anything if we are being killed. 667 } else { 668 jio_fprintf(defaultStream::error_stream(), "Exception "); 669 if (thread != NULL && thread->threadObj() != NULL) { 670 ResourceMark rm(THREAD); 671 jio_fprintf(defaultStream::error_stream(), 672 "in thread \"%s\" ", thread->get_thread_name()); 673 } 674 if (ex->is_a(SystemDictionary::Throwable_klass())) { 675 JavaValue result(T_VOID); 676 JavaCalls::call_virtual(&result, 677 ex, 678 SystemDictionary::Throwable_klass(), 679 vmSymbols::printStackTrace_name(), 680 vmSymbols::void_method_signature(), 681 THREAD); 682 // If an exception is thrown in the call it gets thrown away. Not much 683 // we can do with it. The native code that calls this, does not check 684 // for the exception - hence, it might still be in the thread when DestroyVM gets 685 // called, potentially causing a few asserts to trigger - since no pending exception 686 // is expected. 687 CLEAR_PENDING_EXCEPTION; 688 } else { 689 ResourceMark rm(THREAD); 690 jio_fprintf(defaultStream::error_stream(), 691 ". Uncaught exception of type %s.", 692 ex->klass()->external_name()); 693 } 694 } 695 } 696 697 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 698 JNI_END 699 700 701 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 702 JNIWrapper("ExceptionClear"); 703 704 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 705 706 // The jni code might be using this API to clear java thrown exception. 707 // So just mark jvmti thread exception state as exception caught. 708 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 709 if (state != NULL && state->is_exception_detected()) { 710 state->set_exception_caught(); 711 } 712 thread->clear_pending_exception(); 713 714 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 715 JNI_END 716 717 718 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 719 JNIWrapper("FatalError"); 720 721 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 722 723 tty->print_cr("FATAL ERROR in native method: %s", msg); 724 thread->print_stack(); 725 os::abort(); // Dump core and abort 726 JNI_END 727 728 729 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 730 JNIWrapper("PushLocalFrame"); 731 732 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 733 734 //%note jni_11 735 if (capacity < 0 || 736 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 737 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 738 return JNI_ERR; 739 } 740 JNIHandleBlock* old_handles = thread->active_handles(); 741 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 742 assert(new_handles != NULL, "should not be NULL"); 743 new_handles->set_pop_frame_link(old_handles); 744 thread->set_active_handles(new_handles); 745 jint ret = JNI_OK; 746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 747 return ret; 748 JNI_END 749 750 751 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 752 JNIWrapper("PopLocalFrame"); 753 754 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 755 756 //%note jni_11 757 Handle result_handle(thread, JNIHandles::resolve(result)); 758 JNIHandleBlock* old_handles = thread->active_handles(); 759 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 760 if (new_handles != NULL) { 761 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 762 // This way code will still work if PopLocalFrame is called without a corresponding 763 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 764 // the release_block call will release the blocks. 765 thread->set_active_handles(new_handles); 766 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 767 JNIHandleBlock::release_block(old_handles, thread); // may block 768 result = JNIHandles::make_local(thread, result_handle()); 769 } 770 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 771 return result; 772 JNI_END 773 774 775 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 776 JNIWrapper("NewGlobalRef"); 777 778 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 779 780 Handle ref_handle(thread, JNIHandles::resolve(ref)); 781 jobject ret = JNIHandles::make_global(ref_handle); 782 783 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 784 return ret; 785 JNI_END 786 787 // Must be JNI_ENTRY (with HandleMark) 788 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 789 JNIWrapper("DeleteGlobalRef"); 790 791 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 792 793 JNIHandles::destroy_global(ref); 794 795 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 796 JNI_END 797 798 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 799 JNIWrapper("DeleteLocalRef"); 800 801 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 802 803 JNIHandles::destroy_local(obj); 804 805 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 806 JNI_END 807 808 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 809 JNIWrapper("IsSameObject"); 810 811 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 812 813 jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE; 814 815 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 816 return ret; 817 JNI_END 818 819 820 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 821 JNIWrapper("NewLocalRef"); 822 823 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 824 825 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 826 827 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 828 return ret; 829 JNI_END 830 831 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 832 JNIWrapper("EnsureLocalCapacity"); 833 834 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 835 836 jint ret; 837 if (capacity >= 0 && 838 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 839 ret = JNI_OK; 840 } else { 841 ret = JNI_ERR; 842 } 843 844 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 845 return ret; 846 JNI_END 847 848 // Return the Handle Type 849 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 850 JNIWrapper("GetObjectRefType"); 851 852 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 853 854 jobjectRefType ret = JNIInvalidRefType; 855 if (obj != NULL) { 856 ret = JNIHandles::handle_type(thread, obj); 857 } 858 859 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 860 return ret; 861 JNI_END 862 863 864 class JNI_ArgumentPusher : public SignatureIterator { 865 protected: 866 JavaCallArguments* _arguments; 867 868 virtual void get_bool () = 0; 869 virtual void get_char () = 0; 870 virtual void get_short () = 0; 871 virtual void get_byte () = 0; 872 virtual void get_int () = 0; 873 virtual void get_long () = 0; 874 virtual void get_float () = 0; 875 virtual void get_double () = 0; 876 virtual void get_object () = 0; 877 virtual void get_valuetype() = 0; 878 879 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 880 this->_return_type = T_ILLEGAL; 881 _arguments = NULL; 882 } 883 884 public: 885 virtual void iterate( uint64_t fingerprint ) = 0; 886 887 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 888 889 inline void do_bool() { if (!is_return_type()) get_bool(); } 890 inline void do_char() { if (!is_return_type()) get_char(); } 891 inline void do_short() { if (!is_return_type()) get_short(); } 892 inline void do_byte() { if (!is_return_type()) get_byte(); } 893 inline void do_int() { if (!is_return_type()) get_int(); } 894 inline void do_long() { if (!is_return_type()) get_long(); } 895 inline void do_float() { if (!is_return_type()) get_float(); } 896 inline void do_double() { if (!is_return_type()) get_double(); } 897 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 898 inline void do_valuetype(int begin, int end) { if (!is_return_type()) get_valuetype(); } 899 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 900 inline void do_void() { } 901 902 JavaCallArguments* arguments() { return _arguments; } 903 void push_receiver(Handle h) { _arguments->push_oop(h); } 904 }; 905 906 907 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 908 protected: 909 va_list _ap; 910 911 inline void get_bool() { 912 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 913 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 914 // TemplateInterpreterGenerator::generate_result_handler_for and 915 // SharedRuntime::generate_native_wrapper. 916 jboolean b = va_arg(_ap, jint); 917 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 918 } 919 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 920 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 921 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 922 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 923 924 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 925 926 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 927 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 928 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 929 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 930 inline void get_valuetype() { _arguments->push_jobject(va_arg(_ap, jobject)); } 931 932 inline void set_ap(va_list rap) { 933 va_copy(_ap, rap); 934 } 935 936 public: 937 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 938 : JNI_ArgumentPusher(signature) { 939 set_ap(rap); 940 } 941 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 942 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 943 set_ap(rap); 944 } 945 946 // Optimized path if we have the bitvector form of signature 947 void iterate( uint64_t fingerprint ) { 948 if (fingerprint == (uint64_t)CONST64(-1)) { 949 SignatureIterator::iterate(); // Must be too many arguments 950 } else { 951 _return_type = (BasicType)((fingerprint >> static_feature_size) & 952 result_feature_mask); 953 954 assert(fingerprint, "Fingerprint should not be 0"); 955 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 956 while ( 1 ) { 957 switch ( fingerprint & parameter_feature_mask ) { 958 case bool_parm: 959 get_bool(); 960 break; 961 case char_parm: 962 get_char(); 963 break; 964 case short_parm: 965 get_short(); 966 break; 967 case byte_parm: 968 get_byte(); 969 break; 970 case int_parm: 971 get_int(); 972 break; 973 case obj_parm: 974 get_object(); 975 break; 976 case long_parm: 977 get_long(); 978 break; 979 case float_parm: 980 get_float(); 981 break; 982 case double_parm: 983 get_double(); 984 break; 985 case done_parm: 986 return; 987 break; 988 default: 989 ShouldNotReachHere(); 990 break; 991 } 992 fingerprint >>= parameter_feature_size; 993 } 994 } 995 } 996 }; 997 998 999 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1000 protected: 1001 const jvalue *_ap; 1002 1003 inline void get_bool() { 1004 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1005 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1006 // TemplateInterpreterGenerator::generate_result_handler_for and 1007 // SharedRuntime::generate_native_wrapper. 1008 jboolean b = (_ap++)->z; 1009 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1010 } 1011 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1012 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1013 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1014 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1015 1016 inline void get_long() { _arguments->push_long((_ap++)->j); } 1017 inline void get_float() { _arguments->push_float((_ap++)->f); } 1018 inline void get_double() { _arguments->push_double((_ap++)->d);} 1019 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1020 // value types are implemented with oops too 1021 inline void get_valuetype() { _arguments->push_jobject((_ap++)->l); } 1022 1023 inline void set_ap(const jvalue *rap) { _ap = rap; } 1024 1025 public: 1026 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1027 : JNI_ArgumentPusher(signature) { 1028 set_ap(rap); 1029 } 1030 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1031 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1032 set_ap(rap); 1033 } 1034 1035 // Optimized path if we have the bitvector form of signature 1036 void iterate( uint64_t fingerprint ) { 1037 if (fingerprint == (uint64_t)CONST64(-1)) { 1038 SignatureIterator::iterate(); // Must be too many arguments 1039 } else { 1040 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1041 result_feature_mask); 1042 assert(fingerprint, "Fingerprint should not be 0"); 1043 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1044 while ( 1 ) { 1045 switch ( fingerprint & parameter_feature_mask ) { 1046 case bool_parm: 1047 get_bool(); 1048 break; 1049 case char_parm: 1050 get_char(); 1051 break; 1052 case short_parm: 1053 get_short(); 1054 break; 1055 case byte_parm: 1056 get_byte(); 1057 break; 1058 case int_parm: 1059 get_int(); 1060 break; 1061 case obj_parm: 1062 get_object(); 1063 break; 1064 case long_parm: 1065 get_long(); 1066 break; 1067 case float_parm: 1068 get_float(); 1069 break; 1070 case double_parm: 1071 get_double(); 1072 break; 1073 case done_parm: 1074 return; 1075 break; 1076 default: 1077 ShouldNotReachHere(); 1078 break; 1079 } 1080 fingerprint >>= parameter_feature_size; 1081 } 1082 } 1083 } 1084 }; 1085 1086 1087 enum JNICallType { 1088 JNI_STATIC, 1089 JNI_VIRTUAL, 1090 JNI_NONVIRTUAL 1091 }; 1092 1093 1094 1095 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1096 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1097 1098 // Create object to hold arguments for the JavaCall, and associate it with 1099 // the jni parser 1100 ResourceMark rm(THREAD); 1101 int number_of_parameters = method->size_of_parameters(); 1102 JavaCallArguments java_args(number_of_parameters); 1103 args->set_java_argument_object(&java_args); 1104 1105 assert(method->is_static(), "method should be static"); 1106 1107 // Fill out JavaCallArguments object 1108 args->iterate( Fingerprinter(method).fingerprint() ); 1109 // Initialize result type 1110 result->set_type(args->get_ret_type()); 1111 1112 // Invoke the method. Result is returned as oop. 1113 JavaCalls::call(result, method, &java_args, CHECK); 1114 1115 // Convert result 1116 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY || result->get_type() == T_VALUETYPE) { 1117 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1118 } 1119 } 1120 1121 1122 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1123 oop recv = JNIHandles::resolve(receiver); 1124 if (recv == NULL) { 1125 THROW(vmSymbols::java_lang_NullPointerException()); 1126 } 1127 Handle h_recv(THREAD, recv); 1128 1129 int number_of_parameters; 1130 Method* selected_method; 1131 { 1132 Method* m = Method::resolve_jmethod_id(method_id); 1133 number_of_parameters = m->size_of_parameters(); 1134 Klass* holder = m->method_holder(); 1135 if (call_type != JNI_VIRTUAL) { 1136 selected_method = m; 1137 } else if (!m->has_itable_index()) { 1138 // non-interface call -- for that little speed boost, don't handlize 1139 debug_only(NoSafepointVerifier nosafepoint;) 1140 // jni_GetMethodID makes sure class is linked and initialized 1141 // so m should have a valid vtable index. 1142 assert(m->valid_vtable_index(), "no valid vtable index"); 1143 int vtbl_index = m->vtable_index(); 1144 if (vtbl_index != Method::nonvirtual_vtable_index) { 1145 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1146 } else { 1147 // final method 1148 selected_method = m; 1149 } 1150 } else { 1151 // interface call 1152 int itbl_index = m->itable_index(); 1153 Klass* k = h_recv->klass(); 1154 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1155 } 1156 } 1157 1158 methodHandle method(THREAD, selected_method); 1159 1160 // Create object to hold arguments for the JavaCall, and associate it with 1161 // the jni parser 1162 ResourceMark rm(THREAD); 1163 JavaCallArguments java_args(number_of_parameters); 1164 args->set_java_argument_object(&java_args); 1165 1166 // handle arguments 1167 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1168 args->push_receiver(h_recv); // Push jobject handle 1169 1170 // Fill out JavaCallArguments object 1171 args->iterate( Fingerprinter(method).fingerprint() ); 1172 // Initialize result type 1173 result->set_type(args->get_ret_type()); 1174 1175 // Invoke the method. Result is returned as oop. 1176 JavaCalls::call(result, method, &java_args, CHECK); 1177 1178 // Convert result 1179 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY || result->get_type() == T_VALUETYPE) { 1180 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1181 } 1182 } 1183 1184 1185 static instanceOop alloc_object(jclass clazz, TRAPS) { 1186 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1187 if (k == NULL) { 1188 ResourceMark rm(THREAD); 1189 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1190 } 1191 k->check_valid_for_instantiation(false, CHECK_NULL); 1192 k->initialize(CHECK_NULL); 1193 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1194 return ih; 1195 } 1196 1197 DT_RETURN_MARK_DECL(AllocObject, jobject 1198 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1199 1200 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1201 JNIWrapper("AllocObject"); 1202 1203 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1204 1205 jobject ret = NULL; 1206 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1207 1208 instanceOop i = alloc_object(clazz, CHECK_NULL); 1209 ret = JNIHandles::make_local(env, i); 1210 return ret; 1211 JNI_END 1212 1213 DT_RETURN_MARK_DECL(NewObjectA, jobject 1214 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1215 1216 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1217 JNIWrapper("NewObjectA"); 1218 1219 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1220 1221 jobject obj = NULL; 1222 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1223 1224 instanceOop i = alloc_object(clazz, CHECK_NULL); 1225 obj = JNIHandles::make_local(env, i); 1226 JavaValue jvalue(T_VOID); 1227 JNI_ArgumentPusherArray ap(methodID, args); 1228 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1229 return obj; 1230 JNI_END 1231 1232 1233 DT_RETURN_MARK_DECL(NewObjectV, jobject 1234 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1235 1236 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1237 JNIWrapper("NewObjectV"); 1238 1239 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1240 1241 jobject obj = NULL; 1242 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1243 1244 instanceOop i = alloc_object(clazz, CHECK_NULL); 1245 obj = JNIHandles::make_local(env, i); 1246 JavaValue jvalue(T_VOID); 1247 JNI_ArgumentPusherVaArg ap(methodID, args); 1248 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1249 return obj; 1250 JNI_END 1251 1252 1253 DT_RETURN_MARK_DECL(NewObject, jobject 1254 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1255 1256 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1257 JNIWrapper("NewObject"); 1258 1259 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1260 1261 jobject obj = NULL; 1262 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1263 1264 instanceOop i = alloc_object(clazz, CHECK_NULL); 1265 obj = JNIHandles::make_local(env, i); 1266 va_list args; 1267 va_start(args, methodID); 1268 JavaValue jvalue(T_VOID); 1269 JNI_ArgumentPusherVaArg ap(methodID, args); 1270 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1271 va_end(args); 1272 return obj; 1273 JNI_END 1274 1275 1276 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1277 JNIWrapper("GetObjectClass"); 1278 1279 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1280 1281 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1282 jclass ret = 1283 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1284 1285 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1286 return ret; 1287 JNI_END 1288 1289 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1290 JNIWrapper("IsInstanceOf"); 1291 1292 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1293 1294 jboolean ret = JNI_TRUE; 1295 if (obj != NULL) { 1296 ret = JNI_FALSE; 1297 Klass* k = java_lang_Class::as_Klass( 1298 JNIHandles::resolve_non_null(clazz)); 1299 if (k != NULL) { 1300 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1301 } 1302 } 1303 1304 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1305 return ret; 1306 JNI_END 1307 1308 1309 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1310 const char *sig, bool is_static, TRAPS) { 1311 // %%%% This code should probably just call into a method in the LinkResolver 1312 // 1313 // The class should have been loaded (we have an instance of the class 1314 // passed in) so the method and signature should already be in the symbol 1315 // table. If they're not there, the method doesn't exist. 1316 const char *name_to_probe = (name_str == NULL) 1317 ? vmSymbols::object_initializer_name()->as_C_string() 1318 : name_str; 1319 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1320 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1321 1322 if (name == NULL || signature == NULL) { 1323 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1324 } 1325 1326 // Throw a NoSuchMethodError exception if we have an instance of a 1327 // primitive java.lang.Class 1328 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1329 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1330 } 1331 1332 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1333 1334 // Make sure class is linked and initialized before handing id's out to 1335 // Method*s. 1336 klass->initialize(CHECK_NULL); 1337 1338 Method* m; 1339 if (name == vmSymbols::object_initializer_name() || 1340 name == vmSymbols::class_initializer_name()) { 1341 // Never search superclasses for constructors 1342 if (klass->is_instance_klass()) { 1343 m = InstanceKlass::cast(klass)->find_method(name, signature); 1344 } else { 1345 m = NULL; 1346 } 1347 } else { 1348 m = klass->lookup_method(name, signature); 1349 if (m == NULL && klass->is_instance_klass()) { 1350 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1351 } 1352 } 1353 if (m == NULL || (m->is_static() != is_static)) { 1354 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1355 } 1356 return m->jmethod_id(); 1357 } 1358 1359 1360 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1361 const char *name, const char *sig)) 1362 JNIWrapper("GetMethodID"); 1363 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1364 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1365 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1366 return ret; 1367 JNI_END 1368 1369 1370 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1371 const char *name, const char *sig)) 1372 JNIWrapper("GetStaticMethodID"); 1373 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1374 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1375 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1376 return ret; 1377 JNI_END 1378 1379 1380 1381 // 1382 // Calling Methods 1383 // 1384 1385 1386 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1387 , EntryProbe, ReturnProbe) \ 1388 \ 1389 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1390 , ReturnProbe); \ 1391 \ 1392 JNI_ENTRY(ResultType, \ 1393 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1394 JNIWrapper("Call" XSTR(Result) "Method"); \ 1395 \ 1396 EntryProbe; \ 1397 ResultType ret = 0;\ 1398 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1399 (const ResultType&)ret);\ 1400 \ 1401 va_list args; \ 1402 va_start(args, methodID); \ 1403 JavaValue jvalue(Tag); \ 1404 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1405 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1406 va_end(args); \ 1407 ret = jvalue.get_##ResultType(); \ 1408 return ret;\ 1409 JNI_END 1410 1411 // the runtime type of subword integral basic types is integer 1412 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1413 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1414 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1415 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1416 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1417 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1418 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1419 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1420 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1421 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1422 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1423 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1424 1425 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1426 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1428 DEFINE_CALLMETHOD(jint, Int, T_INT, 1429 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1431 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1432 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1434 // Float and double probes don't return value because dtrace doesn't currently support it 1435 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1436 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1438 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1439 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1441 1442 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1443 , EntryProbe, ReturnProbe) \ 1444 \ 1445 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1446 , ReturnProbe); \ 1447 \ 1448 JNI_ENTRY(ResultType, \ 1449 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1450 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1451 \ 1452 EntryProbe;\ 1453 ResultType ret = 0;\ 1454 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1455 (const ResultType&)ret);\ 1456 \ 1457 JavaValue jvalue(Tag); \ 1458 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1459 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1460 ret = jvalue.get_##ResultType(); \ 1461 return ret;\ 1462 JNI_END 1463 1464 // the runtime type of subword integral basic types is integer 1465 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1466 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1467 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1468 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1469 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1470 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1471 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1472 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1473 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1474 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1475 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1477 1478 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1479 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1481 DEFINE_CALLMETHODV(jint, Int, T_INT, 1482 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1484 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1485 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1487 // Float and double probes don't return value because dtrace doesn't currently support it 1488 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1489 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1491 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1492 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1494 1495 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1496 , EntryProbe, ReturnProbe) \ 1497 \ 1498 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1499 , ReturnProbe); \ 1500 \ 1501 JNI_ENTRY(ResultType, \ 1502 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1503 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1504 EntryProbe; \ 1505 ResultType ret = 0;\ 1506 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1507 (const ResultType&)ret);\ 1508 \ 1509 JavaValue jvalue(Tag); \ 1510 JNI_ArgumentPusherArray ap(methodID, args); \ 1511 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1512 ret = jvalue.get_##ResultType(); \ 1513 return ret;\ 1514 JNI_END 1515 1516 // the runtime type of subword integral basic types is integer 1517 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1518 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1519 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1520 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1521 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1522 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1523 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1524 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1525 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1526 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1527 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1529 1530 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1531 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1533 DEFINE_CALLMETHODA(jint, Int, T_INT, 1534 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1536 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1537 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1539 // Float and double probes don't return value because dtrace doesn't currently support it 1540 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1541 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1543 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1544 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1546 1547 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1548 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1549 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1550 1551 1552 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1553 JNIWrapper("CallVoidMethod"); 1554 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1555 DT_VOID_RETURN_MARK(CallVoidMethod); 1556 1557 va_list args; 1558 va_start(args, methodID); 1559 JavaValue jvalue(T_VOID); 1560 JNI_ArgumentPusherVaArg ap(methodID, args); 1561 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1562 va_end(args); 1563 JNI_END 1564 1565 1566 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1567 JNIWrapper("CallVoidMethodV"); 1568 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1569 DT_VOID_RETURN_MARK(CallVoidMethodV); 1570 1571 JavaValue jvalue(T_VOID); 1572 JNI_ArgumentPusherVaArg ap(methodID, args); 1573 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1574 JNI_END 1575 1576 1577 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1578 JNIWrapper("CallVoidMethodA"); 1579 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1580 DT_VOID_RETURN_MARK(CallVoidMethodA); 1581 1582 JavaValue jvalue(T_VOID); 1583 JNI_ArgumentPusherArray ap(methodID, args); 1584 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1585 JNI_END 1586 1587 1588 1589 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1590 , EntryProbe, ReturnProbe) \ 1591 \ 1592 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1593 , ReturnProbe);\ 1594 \ 1595 JNI_ENTRY(ResultType, \ 1596 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1597 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1598 \ 1599 EntryProbe;\ 1600 ResultType ret;\ 1601 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1602 (const ResultType&)ret);\ 1603 \ 1604 va_list args; \ 1605 va_start(args, methodID); \ 1606 JavaValue jvalue(Tag); \ 1607 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1608 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1609 va_end(args); \ 1610 ret = jvalue.get_##ResultType(); \ 1611 return ret;\ 1612 JNI_END 1613 1614 // the runtime type of subword integral basic types is integer 1615 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1616 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1617 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1618 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1619 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1620 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1621 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1622 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1623 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1624 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1625 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1627 1628 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1629 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1631 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1632 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1634 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1635 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 // Float and double probes don't return value because dtrace doesn't currently support it 1637 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1638 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1639 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1641 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1642 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1644 1645 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1646 , EntryProbe, ReturnProbe) \ 1647 \ 1648 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1649 , ReturnProbe);\ 1650 \ 1651 JNI_ENTRY(ResultType, \ 1652 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1653 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1654 \ 1655 EntryProbe;\ 1656 ResultType ret;\ 1657 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1658 (const ResultType&)ret);\ 1659 \ 1660 JavaValue jvalue(Tag); \ 1661 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1662 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1663 ret = jvalue.get_##ResultType(); \ 1664 return ret;\ 1665 JNI_END 1666 1667 // the runtime type of subword integral basic types is integer 1668 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1669 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1670 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1671 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1672 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1673 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1674 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1675 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1676 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1677 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1678 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1680 1681 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1682 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1684 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1685 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1687 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1688 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 // Float and double probes don't return value because dtrace doesn't currently support it 1690 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1691 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1692 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1694 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1695 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1697 1698 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1699 , EntryProbe, ReturnProbe) \ 1700 \ 1701 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1702 , ReturnProbe);\ 1703 \ 1704 JNI_ENTRY(ResultType, \ 1705 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1706 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1707 \ 1708 EntryProbe;\ 1709 ResultType ret;\ 1710 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1711 (const ResultType&)ret);\ 1712 \ 1713 JavaValue jvalue(Tag); \ 1714 JNI_ArgumentPusherArray ap(methodID, args); \ 1715 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1716 ret = jvalue.get_##ResultType(); \ 1717 return ret;\ 1718 JNI_END 1719 1720 // the runtime type of subword integral basic types is integer 1721 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1722 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1723 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1724 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1725 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1726 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1727 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1728 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1729 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1730 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1731 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1732 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1733 1734 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1735 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1737 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1738 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1740 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1741 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 // Float and double probes don't return value because dtrace doesn't currently support it 1743 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1744 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1745 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1747 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1748 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1750 1751 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1752 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1753 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1754 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1755 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1756 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1757 1758 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1759 JNIWrapper("CallNonvirtualVoidMethod"); 1760 1761 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1762 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1763 1764 va_list args; 1765 va_start(args, methodID); 1766 JavaValue jvalue(T_VOID); 1767 JNI_ArgumentPusherVaArg ap(methodID, args); 1768 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1769 va_end(args); 1770 JNI_END 1771 1772 1773 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1774 JNIWrapper("CallNonvirtualVoidMethodV"); 1775 1776 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1777 env, obj, cls, (uintptr_t) methodID); 1778 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1779 1780 JavaValue jvalue(T_VOID); 1781 JNI_ArgumentPusherVaArg ap(methodID, args); 1782 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1783 JNI_END 1784 1785 1786 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1787 JNIWrapper("CallNonvirtualVoidMethodA"); 1788 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1789 env, obj, cls, (uintptr_t) methodID); 1790 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1791 JavaValue jvalue(T_VOID); 1792 JNI_ArgumentPusherArray ap(methodID, args); 1793 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1794 JNI_END 1795 1796 1797 1798 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1799 , EntryProbe, ResultProbe) \ 1800 \ 1801 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1802 , ResultProbe); \ 1803 \ 1804 JNI_ENTRY(ResultType, \ 1805 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1806 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1807 \ 1808 EntryProbe; \ 1809 ResultType ret = 0;\ 1810 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1811 (const ResultType&)ret);\ 1812 \ 1813 va_list args; \ 1814 va_start(args, methodID); \ 1815 JavaValue jvalue(Tag); \ 1816 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1817 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1818 va_end(args); \ 1819 ret = jvalue.get_##ResultType(); \ 1820 return ret;\ 1821 JNI_END 1822 1823 // the runtime type of subword integral basic types is integer 1824 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1825 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1826 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1827 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1828 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1829 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1830 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1831 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1832 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1833 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1834 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1835 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1836 1837 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1838 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1840 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1841 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1843 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1844 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1846 // Float and double probes don't return value because dtrace doesn't currently support it 1847 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1848 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1850 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1851 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1853 1854 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1855 , EntryProbe, ResultProbe) \ 1856 \ 1857 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1858 , ResultProbe); \ 1859 \ 1860 JNI_ENTRY(ResultType, \ 1861 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1862 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1863 \ 1864 EntryProbe; \ 1865 ResultType ret = 0;\ 1866 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1867 (const ResultType&)ret);\ 1868 \ 1869 JavaValue jvalue(Tag); \ 1870 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1871 /* Make sure class is initialized before trying to invoke its method */ \ 1872 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1873 k->initialize(CHECK_0); \ 1874 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1875 va_end(args); \ 1876 ret = jvalue.get_##ResultType(); \ 1877 return ret;\ 1878 JNI_END 1879 1880 // the runtime type of subword integral basic types is integer 1881 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1882 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1883 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1884 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1885 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1886 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1887 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1888 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1889 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1890 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1891 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1892 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1893 1894 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1895 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1897 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1898 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1900 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1901 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1903 // Float and double probes don't return value because dtrace doesn't currently support it 1904 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1905 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1907 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1908 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1910 1911 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1912 , EntryProbe, ResultProbe) \ 1913 \ 1914 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1915 , ResultProbe); \ 1916 \ 1917 JNI_ENTRY(ResultType, \ 1918 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1919 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1920 \ 1921 EntryProbe; \ 1922 ResultType ret = 0;\ 1923 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1924 (const ResultType&)ret);\ 1925 \ 1926 JavaValue jvalue(Tag); \ 1927 JNI_ArgumentPusherArray ap(methodID, args); \ 1928 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1929 ret = jvalue.get_##ResultType(); \ 1930 return ret;\ 1931 JNI_END 1932 1933 // the runtime type of subword integral basic types is integer 1934 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1935 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1936 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1937 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1938 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1939 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1940 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1941 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1942 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1943 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1944 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1945 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1946 1947 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1948 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1950 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1951 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1953 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1954 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1956 // Float and double probes don't return value because dtrace doesn't currently support it 1957 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1958 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1960 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1961 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1963 1964 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1965 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1966 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1967 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1968 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1969 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1970 1971 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1972 JNIWrapper("CallStaticVoidMethod"); 1973 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1974 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1975 1976 va_list args; 1977 va_start(args, methodID); 1978 JavaValue jvalue(T_VOID); 1979 JNI_ArgumentPusherVaArg ap(methodID, args); 1980 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1981 va_end(args); 1982 JNI_END 1983 1984 1985 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1986 JNIWrapper("CallStaticVoidMethodV"); 1987 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1988 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1989 1990 JavaValue jvalue(T_VOID); 1991 JNI_ArgumentPusherVaArg ap(methodID, args); 1992 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1993 JNI_END 1994 1995 1996 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1997 JNIWrapper("CallStaticVoidMethodA"); 1998 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1999 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2000 2001 JavaValue jvalue(T_VOID); 2002 JNI_ArgumentPusherArray ap(methodID, args); 2003 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2004 JNI_END 2005 2006 2007 // 2008 // Accessing Fields 2009 // 2010 2011 2012 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2013 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2014 2015 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2016 const char *name, const char *sig)) 2017 JNIWrapper("GetFieldID"); 2018 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2019 jfieldID ret = 0; 2020 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2021 2022 // The class should have been loaded (we have an instance of the class 2023 // passed in) so the field and signature should already be in the symbol 2024 // table. If they're not there, the field doesn't exist. 2025 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2026 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2027 if (fieldname == NULL || signame == NULL) { 2028 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2029 } 2030 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2031 // Make sure class is initialized before handing id's out to fields 2032 k->initialize(CHECK_NULL); 2033 2034 fieldDescriptor fd; 2035 if (!k->is_instance_klass() || 2036 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2037 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2038 } 2039 2040 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2041 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2042 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2043 return ret; 2044 JNI_END 2045 2046 2047 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2048 JNIWrapper("GetObjectField"); 2049 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2050 oop o = JNIHandles::resolve_non_null(obj); 2051 Klass* k = o->klass(); 2052 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2053 // Keep JVMTI addition small and only check enabled flag here. 2054 // jni_GetField_probe() assumes that is okay to create handles. 2055 if (JvmtiExport::should_post_field_access()) { 2056 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2057 } 2058 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 2059 jobject ret = JNIHandles::make_local(env, loaded_obj); 2060 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2061 return ret; 2062 JNI_END 2063 2064 2065 2066 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2067 , EntryProbe, ReturnProbe) \ 2068 \ 2069 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2070 , ReturnProbe); \ 2071 \ 2072 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2073 JNIWrapper("Get" XSTR(Result) "Field"); \ 2074 \ 2075 EntryProbe; \ 2076 Return ret = 0;\ 2077 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2078 \ 2079 oop o = JNIHandles::resolve_non_null(obj); \ 2080 Klass* k = o->klass(); \ 2081 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2082 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2083 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2084 /* and creates a ResetNoHandleMark. */ \ 2085 if (JvmtiExport::should_post_field_access()) { \ 2086 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2087 } \ 2088 ret = o->Fieldname##_field(offset); \ 2089 return ret; \ 2090 JNI_END 2091 2092 DEFINE_GETFIELD(jboolean, bool, Boolean 2093 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2094 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2095 DEFINE_GETFIELD(jbyte, byte, Byte 2096 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2097 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2098 DEFINE_GETFIELD(jchar, char, Char 2099 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2100 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2101 DEFINE_GETFIELD(jshort, short, Short 2102 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2103 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2104 DEFINE_GETFIELD(jint, int, Int 2105 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2106 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2107 DEFINE_GETFIELD(jlong, long, Long 2108 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2109 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2110 // Float and double probes don't return value because dtrace doesn't currently support it 2111 DEFINE_GETFIELD(jfloat, float, Float 2112 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2113 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2114 DEFINE_GETFIELD(jdouble, double, Double 2115 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2116 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2117 2118 address jni_GetBooleanField_addr() { 2119 return (address)jni_GetBooleanField; 2120 } 2121 address jni_GetByteField_addr() { 2122 return (address)jni_GetByteField; 2123 } 2124 address jni_GetCharField_addr() { 2125 return (address)jni_GetCharField; 2126 } 2127 address jni_GetShortField_addr() { 2128 return (address)jni_GetShortField; 2129 } 2130 address jni_GetIntField_addr() { 2131 return (address)jni_GetIntField; 2132 } 2133 address jni_GetLongField_addr() { 2134 return (address)jni_GetLongField; 2135 } 2136 address jni_GetFloatField_addr() { 2137 return (address)jni_GetFloatField; 2138 } 2139 address jni_GetDoubleField_addr() { 2140 return (address)jni_GetDoubleField; 2141 } 2142 2143 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2144 JNIWrapper("SetObjectField"); 2145 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2146 oop o = JNIHandles::resolve_non_null(obj); 2147 Klass* k = o->klass(); 2148 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2149 // Keep JVMTI addition small and only check enabled flag here. 2150 // jni_SetField_probe_nh() assumes that is not okay to create handles 2151 // and creates a ResetNoHandleMark. 2152 if (JvmtiExport::should_post_field_modification()) { 2153 jvalue field_value; 2154 field_value.l = value; 2155 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2156 } 2157 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2158 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2159 JNI_END 2160 2161 2162 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2163 , EntryProbe, ReturnProbe) \ 2164 \ 2165 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2166 JNIWrapper("Set" XSTR(Result) "Field"); \ 2167 \ 2168 EntryProbe; \ 2169 \ 2170 oop o = JNIHandles::resolve_non_null(obj); \ 2171 Klass* k = o->klass(); \ 2172 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2173 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2174 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2175 /* and creates a ResetNoHandleMark. */ \ 2176 if (JvmtiExport::should_post_field_modification()) { \ 2177 jvalue field_value; \ 2178 field_value.unionType = value; \ 2179 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2180 } \ 2181 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2182 o->Fieldname##_field_put(offset, value); \ 2183 ReturnProbe; \ 2184 JNI_END 2185 2186 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2187 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2188 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2189 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2190 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2191 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2192 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2193 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2194 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2195 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2196 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2197 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2198 DEFINE_SETFIELD(jint, int, Int, 'I', i 2199 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2200 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2201 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2202 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2203 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2204 // Float and double probes don't return value because dtrace doesn't currently support it 2205 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2206 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2207 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2208 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2209 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2210 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2211 2212 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2213 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2214 2215 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2216 JNIWrapper("ToReflectedField"); 2217 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2218 jobject ret = NULL; 2219 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2220 2221 fieldDescriptor fd; 2222 bool found = false; 2223 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2224 2225 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2226 2227 if (isStatic) { 2228 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2229 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2230 assert(id->is_static_field_id(), "invalid static field id"); 2231 found = id->find_local_field(&fd); 2232 } else { 2233 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2234 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2235 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2236 } 2237 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2238 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2239 ret = JNIHandles::make_local(env, reflected); 2240 return ret; 2241 JNI_END 2242 2243 2244 // 2245 // Accessing Static Fields 2246 // 2247 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2248 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2249 2250 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2251 const char *name, const char *sig)) 2252 JNIWrapper("GetStaticFieldID"); 2253 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2254 jfieldID ret = NULL; 2255 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2256 2257 // The class should have been loaded (we have an instance of the class 2258 // passed in) so the field and signature should already be in the symbol 2259 // table. If they're not there, the field doesn't exist. 2260 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2261 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2262 if (fieldname == NULL || signame == NULL) { 2263 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2264 } 2265 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2266 // Make sure class is initialized before handing id's out to static fields 2267 k->initialize(CHECK_NULL); 2268 2269 fieldDescriptor fd; 2270 if (!k->is_instance_klass() || 2271 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2272 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2273 } 2274 2275 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2276 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2277 debug_only(id->set_is_static_field_id();) 2278 2279 debug_only(id->verify(fd.field_holder())); 2280 2281 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2282 return ret; 2283 JNI_END 2284 2285 2286 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2287 JNIWrapper("GetStaticObjectField"); 2288 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2289 #if INCLUDE_JNI_CHECK 2290 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2291 #endif // INCLUDE_JNI_CHECK 2292 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2293 assert(id->is_static_field_id(), "invalid static field id"); 2294 // Keep JVMTI addition small and only check enabled flag here. 2295 // jni_GetField_probe() assumes that is okay to create handles. 2296 if (JvmtiExport::should_post_field_access()) { 2297 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2298 } 2299 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2300 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2301 return ret; 2302 JNI_END 2303 2304 2305 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2306 , EntryProbe, ReturnProbe) \ 2307 \ 2308 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2309 , ReturnProbe); \ 2310 \ 2311 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2312 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2313 EntryProbe; \ 2314 Return ret = 0;\ 2315 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2316 (const Return&)ret);\ 2317 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2318 assert(id->is_static_field_id(), "invalid static field id"); \ 2319 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2320 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2321 if (JvmtiExport::should_post_field_access()) { \ 2322 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2323 } \ 2324 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2325 return ret;\ 2326 JNI_END 2327 2328 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2329 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2330 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2331 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2332 DEFINE_GETSTATICFIELD(jchar, char, Char 2333 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2334 DEFINE_GETSTATICFIELD(jshort, short, Short 2335 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2336 DEFINE_GETSTATICFIELD(jint, int, Int 2337 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2338 DEFINE_GETSTATICFIELD(jlong, long, Long 2339 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2340 // Float and double probes don't return value because dtrace doesn't currently support it 2341 DEFINE_GETSTATICFIELD(jfloat, float, Float 2342 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2343 DEFINE_GETSTATICFIELD(jdouble, double, Double 2344 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2345 2346 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2347 JNIWrapper("SetStaticObjectField"); 2348 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2349 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2350 assert(id->is_static_field_id(), "invalid static field id"); 2351 // Keep JVMTI addition small and only check enabled flag here. 2352 // jni_SetField_probe() assumes that is okay to create handles. 2353 if (JvmtiExport::should_post_field_modification()) { 2354 jvalue field_value; 2355 field_value.l = value; 2356 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2357 } 2358 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2359 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2360 JNI_END 2361 2362 2363 2364 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2365 , EntryProbe, ReturnProbe) \ 2366 \ 2367 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2368 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2369 EntryProbe; \ 2370 \ 2371 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2372 assert(id->is_static_field_id(), "invalid static field id"); \ 2373 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2374 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2375 if (JvmtiExport::should_post_field_modification()) { \ 2376 jvalue field_value; \ 2377 field_value.unionType = value; \ 2378 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2379 } \ 2380 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2381 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2382 ReturnProbe;\ 2383 JNI_END 2384 2385 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2386 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2387 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2388 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2389 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2390 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2391 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2392 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2393 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2394 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2395 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2396 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2397 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2398 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2399 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2400 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2401 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2402 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2403 // Float and double probes don't return value because dtrace doesn't currently support it 2404 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2405 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2406 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2407 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2408 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2409 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2410 2411 // 2412 // String Operations 2413 // 2414 2415 // Unicode Interface 2416 2417 DT_RETURN_MARK_DECL(NewString, jstring 2418 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2419 2420 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2421 JNIWrapper("NewString"); 2422 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2423 jstring ret = NULL; 2424 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2425 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2426 ret = (jstring) JNIHandles::make_local(env, string); 2427 return ret; 2428 JNI_END 2429 2430 2431 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2432 JNIWrapper("GetStringLength"); 2433 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2434 jsize ret = 0; 2435 oop s = JNIHandles::resolve_non_null(string); 2436 ret = java_lang_String::length(s); 2437 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2438 return ret; 2439 JNI_END 2440 2441 2442 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2443 JNIEnv *env, jstring string, jboolean *isCopy)) 2444 JNIWrapper("GetStringChars"); 2445 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2446 jchar* buf = NULL; 2447 oop s = JNIHandles::resolve_non_null(string); 2448 typeArrayOop s_value = java_lang_String::value(s); 2449 if (s_value != NULL) { 2450 int s_len = java_lang_String::length(s, s_value); 2451 bool is_latin1 = java_lang_String::is_latin1(s); 2452 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2453 /* JNI Specification states return NULL on OOM */ 2454 if (buf != NULL) { 2455 if (s_len > 0) { 2456 if (!is_latin1) { 2457 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2458 buf, s_len); 2459 } else { 2460 for (int i = 0; i < s_len; i++) { 2461 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2462 } 2463 } 2464 } 2465 buf[s_len] = 0; 2466 //%note jni_5 2467 if (isCopy != NULL) { 2468 *isCopy = JNI_TRUE; 2469 } 2470 } 2471 } 2472 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2473 return buf; 2474 JNI_END 2475 2476 2477 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2478 JNIWrapper("ReleaseStringChars"); 2479 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2480 //%note jni_6 2481 if (chars != NULL) { 2482 // Since String objects are supposed to be immutable, don't copy any 2483 // new data back. A bad user will have to go after the char array. 2484 FreeHeap((void*) chars); 2485 } 2486 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2487 JNI_END 2488 2489 2490 // UTF Interface 2491 2492 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2493 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2494 2495 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2496 JNIWrapper("NewStringUTF"); 2497 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2498 jstring ret; 2499 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2500 2501 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2502 ret = (jstring) JNIHandles::make_local(env, result); 2503 return ret; 2504 JNI_END 2505 2506 2507 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2508 JNIWrapper("GetStringUTFLength"); 2509 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2510 oop java_string = JNIHandles::resolve_non_null(string); 2511 jsize ret = java_lang_String::utf8_length(java_string); 2512 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2513 return ret; 2514 JNI_END 2515 2516 2517 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2518 JNIWrapper("GetStringUTFChars"); 2519 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2520 char* result = NULL; 2521 oop java_string = JNIHandles::resolve_non_null(string); 2522 typeArrayOop s_value = java_lang_String::value(java_string); 2523 if (s_value != NULL) { 2524 size_t length = java_lang_String::utf8_length(java_string, s_value); 2525 /* JNI Specification states return NULL on OOM */ 2526 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2527 if (result != NULL) { 2528 java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1); 2529 if (isCopy != NULL) { 2530 *isCopy = JNI_TRUE; 2531 } 2532 } 2533 } 2534 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2535 return result; 2536 JNI_END 2537 2538 2539 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2540 JNIWrapper("ReleaseStringUTFChars"); 2541 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2542 if (chars != NULL) { 2543 FreeHeap((char*) chars); 2544 } 2545 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2546 JNI_END 2547 2548 2549 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2550 JNIWrapper("GetArrayLength"); 2551 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2552 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2553 assert(a->is_array(), "must be array"); 2554 jsize ret = a->length(); 2555 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2556 return ret; 2557 JNI_END 2558 2559 2560 // 2561 // Object Array Operations 2562 // 2563 2564 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2565 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2566 2567 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2568 JNIWrapper("NewObjectArray"); 2569 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2570 jobjectArray ret = NULL; 2571 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2572 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2573 Klass* ak = ek->array_klass(CHECK_NULL); 2574 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2575 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2576 oop initial_value = JNIHandles::resolve(initialElement); 2577 if (initial_value != NULL) { // array already initialized with NULL 2578 for (int index = 0; index < length; index++) { 2579 result->obj_at_put(index, initial_value); 2580 } 2581 } 2582 ret = (jobjectArray) JNIHandles::make_local(env, result); 2583 return ret; 2584 JNI_END 2585 2586 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2587 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2588 2589 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2590 JNIWrapper("GetObjectArrayElement"); 2591 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2592 jobject ret = NULL; 2593 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2594 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2595 if (a->is_within_bounds(index)) { 2596 ret = JNIHandles::make_local(env, a->obj_at(index)); 2597 return ret; 2598 } else { 2599 ResourceMark rm(THREAD); 2600 stringStream ss; 2601 ss.print("Index %d out of bounds for length %d", index, a->length()); 2602 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2603 } 2604 JNI_END 2605 2606 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2607 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2608 2609 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2610 JNIWrapper("SetObjectArrayElement"); 2611 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2612 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2613 2614 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2615 oop v = JNIHandles::resolve(value); 2616 if (a->is_within_bounds(index)) { 2617 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2618 a->obj_at_put(index, v); 2619 } else { 2620 ResourceMark rm(THREAD); 2621 stringStream ss; 2622 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2623 ss.print("type mismatch: can not store %s to %s[%d]", 2624 v->klass()->external_name(), 2625 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2626 index); 2627 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2628 ss.print("[]"); 2629 } 2630 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2631 } 2632 } else { 2633 ResourceMark rm(THREAD); 2634 stringStream ss; 2635 ss.print("Index %d out of bounds for length %d", index, a->length()); 2636 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2637 } 2638 JNI_END 2639 2640 2641 2642 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2643 ,EntryProbe,ReturnProbe) \ 2644 \ 2645 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2646 , ReturnProbe); \ 2647 \ 2648 JNI_ENTRY(Return, \ 2649 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2650 JNIWrapper("New" XSTR(Result) "Array"); \ 2651 EntryProbe; \ 2652 Return ret = NULL;\ 2653 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2654 \ 2655 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2656 ret = (Return) JNIHandles::make_local(env, obj); \ 2657 return ret;\ 2658 JNI_END 2659 2660 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2661 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2662 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2663 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2664 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2665 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2666 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2667 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2668 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2669 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2670 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2671 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2672 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2673 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2674 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2675 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2676 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2677 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2678 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2679 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2680 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2681 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2682 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2683 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2684 2685 // Return an address which will fault if the caller writes to it. 2686 2687 static char* get_bad_address() { 2688 static char* bad_address = NULL; 2689 if (bad_address == NULL) { 2690 size_t size = os::vm_allocation_granularity(); 2691 bad_address = os::reserve_memory(size); 2692 if (bad_address != NULL) { 2693 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2694 /*is_committed*/false); 2695 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2696 } 2697 } 2698 return bad_address; 2699 } 2700 2701 2702 2703 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2704 , EntryProbe, ReturnProbe) \ 2705 \ 2706 JNI_QUICK_ENTRY(ElementType*, \ 2707 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2708 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2709 EntryProbe; \ 2710 /* allocate an chunk of memory in c land */ \ 2711 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2712 ElementType* result; \ 2713 int len = a->length(); \ 2714 if (len == 0) { \ 2715 if (isCopy != NULL) { \ 2716 *isCopy = JNI_FALSE; \ 2717 } \ 2718 /* Empty array: legal but useless, can't return NULL. \ 2719 * Return a pointer to something useless. \ 2720 * Avoid asserts in typeArrayOop. */ \ 2721 result = (ElementType*)get_bad_address(); \ 2722 } else { \ 2723 /* JNI Specification states return NULL on OOM */ \ 2724 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2725 if (result != NULL) { \ 2726 /* copy the array to the c chunk */ \ 2727 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2728 result, len); \ 2729 if (isCopy) { \ 2730 *isCopy = JNI_TRUE; \ 2731 } \ 2732 } \ 2733 } \ 2734 ReturnProbe; \ 2735 return result; \ 2736 JNI_END 2737 2738 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2739 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2740 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2741 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2742 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2743 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2744 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2745 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2746 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2747 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2748 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2749 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2750 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2751 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2752 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2753 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2754 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2755 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2756 // Float and double probes don't return value because dtrace doesn't currently support it 2757 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2758 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2760 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2761 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2762 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2763 2764 2765 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2766 , EntryProbe, ReturnProbe);\ 2767 \ 2768 JNI_QUICK_ENTRY(void, \ 2769 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2770 ElementType *buf, jint mode)) \ 2771 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2772 EntryProbe; \ 2773 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2774 int len = a->length(); \ 2775 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2776 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2777 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2778 } \ 2779 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2780 FreeHeap(buf); \ 2781 } \ 2782 } \ 2783 ReturnProbe; \ 2784 JNI_END 2785 2786 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2787 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2788 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2790 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2791 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2793 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2794 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2796 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2797 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2799 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2800 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2802 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2803 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2805 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2806 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2808 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2809 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2810 2811 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) { 2812 ResourceMark rm(THREAD); 2813 if (copy_len < 0) { 2814 stringStream ss; 2815 ss.print("Length %d is negative", copy_len); 2816 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2817 } else if (start < 0 || (start > array_len - copy_len)) { 2818 stringStream ss; 2819 ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d", 2820 start, (int64_t)start+(int64_t)copy_len, array_len); 2821 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string()); 2822 } 2823 } 2824 2825 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2826 , EntryProbe, ReturnProbe); \ 2827 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2828 , ReturnProbe); \ 2829 \ 2830 JNI_ENTRY(void, \ 2831 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2832 jsize len, ElementType *buf)) \ 2833 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2834 EntryProbe; \ 2835 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2836 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2837 check_bounds(start, len, src->length(), CHECK); \ 2838 if (len > 0) { \ 2839 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2840 } \ 2841 JNI_END 2842 2843 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2844 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2845 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2846 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2847 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2848 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2849 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2850 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2851 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2852 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2853 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2854 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2855 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2856 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2857 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2858 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2859 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2860 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2861 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2862 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2863 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2864 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2865 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2866 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2867 2868 2869 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2870 , EntryProbe, ReturnProbe); \ 2871 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2872 ,ReturnProbe); \ 2873 \ 2874 JNI_ENTRY(void, \ 2875 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2876 jsize len, const ElementType *buf)) \ 2877 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2878 EntryProbe; \ 2879 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2880 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2881 check_bounds(start, len, dst->length(), CHECK); \ 2882 if (len > 0) { \ 2883 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2884 } \ 2885 JNI_END 2886 2887 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2888 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2889 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2890 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2891 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2892 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2893 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2894 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2895 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2896 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2897 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2898 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2899 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2900 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2901 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2902 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2903 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2904 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2905 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2906 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2907 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2908 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2909 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2910 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2911 2912 2913 // 2914 // Interception of natives 2915 // 2916 2917 // The RegisterNatives call being attempted tried to register with a method that 2918 // is not native. Ask JVM TI what prefixes have been specified. Then check 2919 // to see if the native method is now wrapped with the prefixes. See the 2920 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2921 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2922 #if INCLUDE_JVMTI 2923 ResourceMark rm(THREAD); 2924 Method* method; 2925 int name_len = name->utf8_length(); 2926 char* name_str = name->as_utf8(); 2927 int prefix_count; 2928 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2929 for (int i = 0; i < prefix_count; i++) { 2930 char* prefix = prefixes[i]; 2931 int prefix_len = (int)strlen(prefix); 2932 2933 // try adding this prefix to the method name and see if it matches another method name 2934 int trial_len = name_len + prefix_len; 2935 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2936 strcpy(trial_name_str, prefix); 2937 strcat(trial_name_str, name_str); 2938 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2939 if (trial_name == NULL) { 2940 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2941 } 2942 method = k->lookup_method(trial_name, signature); 2943 if (method == NULL) { 2944 continue; // signature doesn't match, try the next prefix 2945 } 2946 if (method->is_native()) { 2947 method->set_is_prefixed_native(); 2948 return method; // wahoo, we found a prefixed version of the method, return it 2949 } 2950 // found as non-native, so prefix is good, add it, probably just need more prefixes 2951 name_len = trial_len; 2952 name_str = trial_name_str; 2953 } 2954 #endif // INCLUDE_JVMTI 2955 return NULL; // not found 2956 } 2957 2958 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2959 Method* method = k->lookup_method(name, signature); 2960 if (method == NULL) { 2961 ResourceMark rm; 2962 stringStream st; 2963 st.print("Method '"); 2964 Method::print_external_name(&st, k, name, signature); 2965 st.print("' name or signature does not match"); 2966 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2967 } 2968 if (!method->is_native()) { 2969 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2970 method = find_prefixed_native(k, name, signature, THREAD); 2971 if (method == NULL) { 2972 ResourceMark rm; 2973 stringStream st; 2974 st.print("Method '"); 2975 Method::print_external_name(&st, k, name, signature); 2976 st.print("' is not declared as native"); 2977 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2978 } 2979 } 2980 2981 if (entry != NULL) { 2982 method->set_native_function(entry, 2983 Method::native_bind_event_is_interesting); 2984 } else { 2985 method->clear_native_function(); 2986 } 2987 if (PrintJNIResolving) { 2988 ResourceMark rm(THREAD); 2989 tty->print_cr("[Registering JNI native method %s.%s]", 2990 method->method_holder()->external_name(), 2991 method->name()->as_C_string()); 2992 } 2993 return true; 2994 } 2995 2996 DT_RETURN_MARK_DECL(RegisterNatives, jint 2997 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2998 2999 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3000 const JNINativeMethod *methods, 3001 jint nMethods)) 3002 JNIWrapper("RegisterNatives"); 3003 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3004 jint ret = 0; 3005 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3006 3007 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3008 3009 for (int index = 0; index < nMethods; index++) { 3010 const char* meth_name = methods[index].name; 3011 const char* meth_sig = methods[index].signature; 3012 int meth_name_len = (int)strlen(meth_name); 3013 3014 // The class should have been loaded (we have an instance of the class 3015 // passed in) so the method and signature should already be in the symbol 3016 // table. If they're not there, the method doesn't exist. 3017 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3018 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3019 3020 if (name == NULL || signature == NULL) { 3021 ResourceMark rm; 3022 stringStream st; 3023 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3024 // Must return negative value on failure 3025 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3026 } 3027 3028 bool res = register_native(k, name, signature, 3029 (address) methods[index].fnPtr, THREAD); 3030 if (!res) { 3031 ret = -1; 3032 break; 3033 } 3034 } 3035 return ret; 3036 JNI_END 3037 3038 3039 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3040 JNIWrapper("UnregisterNatives"); 3041 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3042 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3043 //%note jni_2 3044 if (k->is_instance_klass()) { 3045 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3046 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3047 if (m->is_native()) { 3048 m->clear_native_function(); 3049 m->set_signature_handler(NULL); 3050 } 3051 } 3052 } 3053 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3054 return 0; 3055 JNI_END 3056 3057 // 3058 // Monitor functions 3059 // 3060 3061 DT_RETURN_MARK_DECL(MonitorEnter, jint 3062 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3063 3064 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3065 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3066 jint ret = JNI_ERR; 3067 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3068 3069 // If the object is null, we can't do anything with it 3070 if (jobj == NULL) { 3071 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3072 } 3073 3074 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3075 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3076 ret = JNI_OK; 3077 return ret; 3078 JNI_END 3079 3080 DT_RETURN_MARK_DECL(MonitorExit, jint 3081 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3082 3083 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3084 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3085 jint ret = JNI_ERR; 3086 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3087 3088 // Don't do anything with a null object 3089 if (jobj == NULL) { 3090 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3091 } 3092 3093 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3094 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3095 3096 ret = JNI_OK; 3097 return ret; 3098 JNI_END 3099 3100 // 3101 // Extensions 3102 // 3103 3104 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3105 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3106 3107 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3108 JNIWrapper("GetStringRegion"); 3109 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3110 DT_VOID_RETURN_MARK(GetStringRegion); 3111 oop s = JNIHandles::resolve_non_null(string); 3112 typeArrayOop s_value = java_lang_String::value(s); 3113 int s_len = java_lang_String::length(s, s_value); 3114 if (start < 0 || len < 0 || start > s_len - len) { 3115 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3116 } else { 3117 if (len > 0) { 3118 bool is_latin1 = java_lang_String::is_latin1(s); 3119 if (!is_latin1) { 3120 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 3121 buf, len); 3122 } else { 3123 for (int i = 0; i < len; i++) { 3124 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3125 } 3126 } 3127 } 3128 } 3129 JNI_END 3130 3131 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3132 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3133 3134 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3135 JNIWrapper("GetStringUTFRegion"); 3136 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3137 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3138 oop s = JNIHandles::resolve_non_null(string); 3139 typeArrayOop s_value = java_lang_String::value(s); 3140 int s_len = java_lang_String::length(s, s_value); 3141 if (start < 0 || len < 0 || start > s_len - len) { 3142 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3143 } else { 3144 //%note jni_7 3145 if (len > 0) { 3146 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3147 java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX); 3148 // as_utf8_string null-terminates the result string 3149 } else { 3150 // JDK null-terminates the buffer even in len is zero 3151 if (buf != NULL) { 3152 buf[0] = 0; 3153 } 3154 } 3155 } 3156 JNI_END 3157 3158 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 3159 if (Universe::heap()->supports_object_pinning()) { 3160 const oop o = JNIHandles::resolve_non_null(obj); 3161 return Universe::heap()->pin_object(thread, o); 3162 } else { 3163 GCLocker::lock_critical(thread); 3164 return JNIHandles::resolve_non_null(obj); 3165 } 3166 } 3167 3168 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 3169 if (Universe::heap()->supports_object_pinning()) { 3170 const oop o = JNIHandles::resolve_non_null(obj); 3171 return Universe::heap()->unpin_object(thread, o); 3172 } else { 3173 GCLocker::unlock_critical(thread); 3174 } 3175 } 3176 3177 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3178 JNIWrapper("GetPrimitiveArrayCritical"); 3179 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3180 if (isCopy != NULL) { 3181 *isCopy = JNI_FALSE; 3182 } 3183 oop a = lock_gc_or_pin_object(thread, array); 3184 assert(a->is_array(), "just checking"); 3185 BasicType type; 3186 if (a->is_objArray()) { 3187 type = T_OBJECT; 3188 } else { 3189 type = TypeArrayKlass::cast(a->klass())->element_type(); 3190 } 3191 void* ret = arrayOop(a)->base(type); 3192 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3193 return ret; 3194 JNI_END 3195 3196 3197 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3198 JNIWrapper("ReleasePrimitiveArrayCritical"); 3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3200 unlock_gc_or_unpin_object(thread, array); 3201 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3202 JNI_END 3203 3204 3205 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3206 JNIWrapper("GetStringCritical"); 3207 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3208 oop s = lock_gc_or_pin_object(thread, string); 3209 typeArrayOop s_value = java_lang_String::value(s); 3210 bool is_latin1 = java_lang_String::is_latin1(s); 3211 if (isCopy != NULL) { 3212 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3213 } 3214 jchar* ret; 3215 if (!is_latin1) { 3216 ret = (jchar*) s_value->base(T_CHAR); 3217 } else { 3218 // Inflate latin1 encoded string to UTF16 3219 int s_len = java_lang_String::length(s, s_value); 3220 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3221 /* JNI Specification states return NULL on OOM */ 3222 if (ret != NULL) { 3223 for (int i = 0; i < s_len; i++) { 3224 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3225 } 3226 ret[s_len] = 0; 3227 } 3228 } 3229 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3230 return ret; 3231 JNI_END 3232 3233 3234 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3235 JNIWrapper("ReleaseStringCritical"); 3236 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3237 // The str and chars arguments are ignored for UTF16 strings 3238 oop s = JNIHandles::resolve_non_null(str); 3239 bool is_latin1 = java_lang_String::is_latin1(s); 3240 if (is_latin1) { 3241 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3242 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3243 FREE_C_HEAP_ARRAY(jchar, chars); 3244 } 3245 unlock_gc_or_unpin_object(thread, str); 3246 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3247 JNI_END 3248 3249 3250 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3251 JNIWrapper("jni_NewWeakGlobalRef"); 3252 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3253 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3254 jweak ret = JNIHandles::make_weak_global(ref_handle); 3255 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3256 return ret; 3257 JNI_END 3258 3259 // Must be JNI_ENTRY (with HandleMark) 3260 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3261 JNIWrapper("jni_DeleteWeakGlobalRef"); 3262 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3263 JNIHandles::destroy_weak_global(ref); 3264 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3265 JNI_END 3266 3267 3268 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3269 JNIWrapper("jni_ExceptionCheck"); 3270 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3271 jni_check_async_exceptions(thread); 3272 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3273 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3274 return ret; 3275 JNI_END 3276 3277 3278 // Initialization state for three routines below relating to 3279 // java.nio.DirectBuffers 3280 static int directBufferSupportInitializeStarted = 0; 3281 static volatile int directBufferSupportInitializeEnded = 0; 3282 static volatile int directBufferSupportInitializeFailed = 0; 3283 static jclass bufferClass = NULL; 3284 static jclass directBufferClass = NULL; 3285 static jclass directByteBufferClass = NULL; 3286 static jmethodID directByteBufferConstructor = NULL; 3287 static jfieldID directBufferAddressField = NULL; 3288 static jfieldID bufferCapacityField = NULL; 3289 3290 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3291 Handle loader; // null (bootstrap) loader 3292 Handle protection_domain; // null protection domain 3293 3294 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3295 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3296 3297 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3298 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3299 } 3300 return result; 3301 } 3302 3303 // These lookups are done with the NULL (bootstrap) ClassLoader to 3304 // circumvent any security checks that would be done by jni_FindClass. 3305 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3306 { 3307 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3308 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3309 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3310 return true; 3311 } 3312 JNI_END 3313 3314 3315 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3316 if (directBufferSupportInitializeFailed) { 3317 return false; 3318 } 3319 3320 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3321 if (!lookupDirectBufferClasses(env)) { 3322 directBufferSupportInitializeFailed = 1; 3323 return false; 3324 } 3325 3326 // Make global references for these 3327 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3328 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3329 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3330 3331 // Get needed field and method IDs 3332 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3333 if (env->ExceptionCheck()) { 3334 env->ExceptionClear(); 3335 directBufferSupportInitializeFailed = 1; 3336 return false; 3337 } 3338 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3339 if (env->ExceptionCheck()) { 3340 env->ExceptionClear(); 3341 directBufferSupportInitializeFailed = 1; 3342 return false; 3343 } 3344 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3345 if (env->ExceptionCheck()) { 3346 env->ExceptionClear(); 3347 directBufferSupportInitializeFailed = 1; 3348 return false; 3349 } 3350 3351 if ((directByteBufferConstructor == NULL) || 3352 (directBufferAddressField == NULL) || 3353 (bufferCapacityField == NULL)) { 3354 directBufferSupportInitializeFailed = 1; 3355 return false; 3356 } 3357 3358 directBufferSupportInitializeEnded = 1; 3359 } else { 3360 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3361 os::naked_yield(); 3362 } 3363 } 3364 3365 return !directBufferSupportInitializeFailed; 3366 } 3367 3368 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3369 { 3370 // thread_from_jni_environment() will block if VM is gone. 3371 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3372 3373 JNIWrapper("jni_NewDirectByteBuffer"); 3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3375 3376 if (!directBufferSupportInitializeEnded) { 3377 if (!initializeDirectBufferSupport(env, thread)) { 3378 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3379 return NULL; 3380 } 3381 } 3382 3383 // Being paranoid about accidental sign extension on address 3384 jlong addr = (jlong) ((uintptr_t) address); 3385 // NOTE that package-private DirectByteBuffer constructor currently 3386 // takes int capacity 3387 jint cap = (jint) capacity; 3388 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3389 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3390 return ret; 3391 } 3392 3393 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3394 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3395 3396 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3397 { 3398 // thread_from_jni_environment() will block if VM is gone. 3399 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3400 3401 JNIWrapper("jni_GetDirectBufferAddress"); 3402 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3403 void* ret = NULL; 3404 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3405 3406 if (!directBufferSupportInitializeEnded) { 3407 if (!initializeDirectBufferSupport(env, thread)) { 3408 return 0; 3409 } 3410 } 3411 3412 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3413 return 0; 3414 } 3415 3416 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3417 return ret; 3418 } 3419 3420 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3421 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3422 3423 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3424 { 3425 // thread_from_jni_environment() will block if VM is gone. 3426 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3427 3428 JNIWrapper("jni_GetDirectBufferCapacity"); 3429 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3430 jlong ret = -1; 3431 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3432 3433 if (!directBufferSupportInitializeEnded) { 3434 if (!initializeDirectBufferSupport(env, thread)) { 3435 ret = 0; 3436 return ret; 3437 } 3438 } 3439 3440 if (buf == NULL) { 3441 return -1; 3442 } 3443 3444 if (!env->IsInstanceOf(buf, directBufferClass)) { 3445 return -1; 3446 } 3447 3448 // NOTE that capacity is currently an int in the implementation 3449 ret = env->GetIntField(buf, bufferCapacityField); 3450 return ret; 3451 } 3452 3453 3454 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3455 JNIWrapper("GetVersion"); 3456 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3457 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3458 return CurrentVersion; 3459 JNI_END 3460 3461 extern struct JavaVM_ main_vm; 3462 3463 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3464 JNIWrapper("jni_GetJavaVM"); 3465 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3466 *vm = (JavaVM *)(&main_vm); 3467 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3468 return JNI_OK; 3469 JNI_END 3470 3471 3472 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3473 JNIWrapper("GetModule"); 3474 return Modules::get_module(clazz, THREAD); 3475 JNI_END 3476 3477 3478 // Structure containing all jni functions 3479 struct JNINativeInterface_ jni_NativeInterface = { 3480 NULL, 3481 NULL, 3482 NULL, 3483 3484 NULL, 3485 3486 jni_GetVersion, 3487 3488 jni_DefineClass, 3489 jni_FindClass, 3490 3491 jni_FromReflectedMethod, 3492 jni_FromReflectedField, 3493 3494 jni_ToReflectedMethod, 3495 3496 jni_GetSuperclass, 3497 jni_IsAssignableFrom, 3498 3499 jni_ToReflectedField, 3500 3501 jni_Throw, 3502 jni_ThrowNew, 3503 jni_ExceptionOccurred, 3504 jni_ExceptionDescribe, 3505 jni_ExceptionClear, 3506 jni_FatalError, 3507 3508 jni_PushLocalFrame, 3509 jni_PopLocalFrame, 3510 3511 jni_NewGlobalRef, 3512 jni_DeleteGlobalRef, 3513 jni_DeleteLocalRef, 3514 jni_IsSameObject, 3515 3516 jni_NewLocalRef, 3517 jni_EnsureLocalCapacity, 3518 3519 jni_AllocObject, 3520 jni_NewObject, 3521 jni_NewObjectV, 3522 jni_NewObjectA, 3523 3524 jni_GetObjectClass, 3525 jni_IsInstanceOf, 3526 3527 jni_GetMethodID, 3528 3529 jni_CallObjectMethod, 3530 jni_CallObjectMethodV, 3531 jni_CallObjectMethodA, 3532 jni_CallBooleanMethod, 3533 jni_CallBooleanMethodV, 3534 jni_CallBooleanMethodA, 3535 jni_CallByteMethod, 3536 jni_CallByteMethodV, 3537 jni_CallByteMethodA, 3538 jni_CallCharMethod, 3539 jni_CallCharMethodV, 3540 jni_CallCharMethodA, 3541 jni_CallShortMethod, 3542 jni_CallShortMethodV, 3543 jni_CallShortMethodA, 3544 jni_CallIntMethod, 3545 jni_CallIntMethodV, 3546 jni_CallIntMethodA, 3547 jni_CallLongMethod, 3548 jni_CallLongMethodV, 3549 jni_CallLongMethodA, 3550 jni_CallFloatMethod, 3551 jni_CallFloatMethodV, 3552 jni_CallFloatMethodA, 3553 jni_CallDoubleMethod, 3554 jni_CallDoubleMethodV, 3555 jni_CallDoubleMethodA, 3556 jni_CallVoidMethod, 3557 jni_CallVoidMethodV, 3558 jni_CallVoidMethodA, 3559 3560 jni_CallNonvirtualObjectMethod, 3561 jni_CallNonvirtualObjectMethodV, 3562 jni_CallNonvirtualObjectMethodA, 3563 jni_CallNonvirtualBooleanMethod, 3564 jni_CallNonvirtualBooleanMethodV, 3565 jni_CallNonvirtualBooleanMethodA, 3566 jni_CallNonvirtualByteMethod, 3567 jni_CallNonvirtualByteMethodV, 3568 jni_CallNonvirtualByteMethodA, 3569 jni_CallNonvirtualCharMethod, 3570 jni_CallNonvirtualCharMethodV, 3571 jni_CallNonvirtualCharMethodA, 3572 jni_CallNonvirtualShortMethod, 3573 jni_CallNonvirtualShortMethodV, 3574 jni_CallNonvirtualShortMethodA, 3575 jni_CallNonvirtualIntMethod, 3576 jni_CallNonvirtualIntMethodV, 3577 jni_CallNonvirtualIntMethodA, 3578 jni_CallNonvirtualLongMethod, 3579 jni_CallNonvirtualLongMethodV, 3580 jni_CallNonvirtualLongMethodA, 3581 jni_CallNonvirtualFloatMethod, 3582 jni_CallNonvirtualFloatMethodV, 3583 jni_CallNonvirtualFloatMethodA, 3584 jni_CallNonvirtualDoubleMethod, 3585 jni_CallNonvirtualDoubleMethodV, 3586 jni_CallNonvirtualDoubleMethodA, 3587 jni_CallNonvirtualVoidMethod, 3588 jni_CallNonvirtualVoidMethodV, 3589 jni_CallNonvirtualVoidMethodA, 3590 3591 jni_GetFieldID, 3592 3593 jni_GetObjectField, 3594 jni_GetBooleanField, 3595 jni_GetByteField, 3596 jni_GetCharField, 3597 jni_GetShortField, 3598 jni_GetIntField, 3599 jni_GetLongField, 3600 jni_GetFloatField, 3601 jni_GetDoubleField, 3602 3603 jni_SetObjectField, 3604 jni_SetBooleanField, 3605 jni_SetByteField, 3606 jni_SetCharField, 3607 jni_SetShortField, 3608 jni_SetIntField, 3609 jni_SetLongField, 3610 jni_SetFloatField, 3611 jni_SetDoubleField, 3612 3613 jni_GetStaticMethodID, 3614 3615 jni_CallStaticObjectMethod, 3616 jni_CallStaticObjectMethodV, 3617 jni_CallStaticObjectMethodA, 3618 jni_CallStaticBooleanMethod, 3619 jni_CallStaticBooleanMethodV, 3620 jni_CallStaticBooleanMethodA, 3621 jni_CallStaticByteMethod, 3622 jni_CallStaticByteMethodV, 3623 jni_CallStaticByteMethodA, 3624 jni_CallStaticCharMethod, 3625 jni_CallStaticCharMethodV, 3626 jni_CallStaticCharMethodA, 3627 jni_CallStaticShortMethod, 3628 jni_CallStaticShortMethodV, 3629 jni_CallStaticShortMethodA, 3630 jni_CallStaticIntMethod, 3631 jni_CallStaticIntMethodV, 3632 jni_CallStaticIntMethodA, 3633 jni_CallStaticLongMethod, 3634 jni_CallStaticLongMethodV, 3635 jni_CallStaticLongMethodA, 3636 jni_CallStaticFloatMethod, 3637 jni_CallStaticFloatMethodV, 3638 jni_CallStaticFloatMethodA, 3639 jni_CallStaticDoubleMethod, 3640 jni_CallStaticDoubleMethodV, 3641 jni_CallStaticDoubleMethodA, 3642 jni_CallStaticVoidMethod, 3643 jni_CallStaticVoidMethodV, 3644 jni_CallStaticVoidMethodA, 3645 3646 jni_GetStaticFieldID, 3647 3648 jni_GetStaticObjectField, 3649 jni_GetStaticBooleanField, 3650 jni_GetStaticByteField, 3651 jni_GetStaticCharField, 3652 jni_GetStaticShortField, 3653 jni_GetStaticIntField, 3654 jni_GetStaticLongField, 3655 jni_GetStaticFloatField, 3656 jni_GetStaticDoubleField, 3657 3658 jni_SetStaticObjectField, 3659 jni_SetStaticBooleanField, 3660 jni_SetStaticByteField, 3661 jni_SetStaticCharField, 3662 jni_SetStaticShortField, 3663 jni_SetStaticIntField, 3664 jni_SetStaticLongField, 3665 jni_SetStaticFloatField, 3666 jni_SetStaticDoubleField, 3667 3668 jni_NewString, 3669 jni_GetStringLength, 3670 jni_GetStringChars, 3671 jni_ReleaseStringChars, 3672 3673 jni_NewStringUTF, 3674 jni_GetStringUTFLength, 3675 jni_GetStringUTFChars, 3676 jni_ReleaseStringUTFChars, 3677 3678 jni_GetArrayLength, 3679 3680 jni_NewObjectArray, 3681 jni_GetObjectArrayElement, 3682 jni_SetObjectArrayElement, 3683 3684 jni_NewBooleanArray, 3685 jni_NewByteArray, 3686 jni_NewCharArray, 3687 jni_NewShortArray, 3688 jni_NewIntArray, 3689 jni_NewLongArray, 3690 jni_NewFloatArray, 3691 jni_NewDoubleArray, 3692 3693 jni_GetBooleanArrayElements, 3694 jni_GetByteArrayElements, 3695 jni_GetCharArrayElements, 3696 jni_GetShortArrayElements, 3697 jni_GetIntArrayElements, 3698 jni_GetLongArrayElements, 3699 jni_GetFloatArrayElements, 3700 jni_GetDoubleArrayElements, 3701 3702 jni_ReleaseBooleanArrayElements, 3703 jni_ReleaseByteArrayElements, 3704 jni_ReleaseCharArrayElements, 3705 jni_ReleaseShortArrayElements, 3706 jni_ReleaseIntArrayElements, 3707 jni_ReleaseLongArrayElements, 3708 jni_ReleaseFloatArrayElements, 3709 jni_ReleaseDoubleArrayElements, 3710 3711 jni_GetBooleanArrayRegion, 3712 jni_GetByteArrayRegion, 3713 jni_GetCharArrayRegion, 3714 jni_GetShortArrayRegion, 3715 jni_GetIntArrayRegion, 3716 jni_GetLongArrayRegion, 3717 jni_GetFloatArrayRegion, 3718 jni_GetDoubleArrayRegion, 3719 3720 jni_SetBooleanArrayRegion, 3721 jni_SetByteArrayRegion, 3722 jni_SetCharArrayRegion, 3723 jni_SetShortArrayRegion, 3724 jni_SetIntArrayRegion, 3725 jni_SetLongArrayRegion, 3726 jni_SetFloatArrayRegion, 3727 jni_SetDoubleArrayRegion, 3728 3729 jni_RegisterNatives, 3730 jni_UnregisterNatives, 3731 3732 jni_MonitorEnter, 3733 jni_MonitorExit, 3734 3735 jni_GetJavaVM, 3736 3737 jni_GetStringRegion, 3738 jni_GetStringUTFRegion, 3739 3740 jni_GetPrimitiveArrayCritical, 3741 jni_ReleasePrimitiveArrayCritical, 3742 3743 jni_GetStringCritical, 3744 jni_ReleaseStringCritical, 3745 3746 jni_NewWeakGlobalRef, 3747 jni_DeleteWeakGlobalRef, 3748 3749 jni_ExceptionCheck, 3750 3751 jni_NewDirectByteBuffer, 3752 jni_GetDirectBufferAddress, 3753 jni_GetDirectBufferCapacity, 3754 3755 // New 1_6 features 3756 3757 jni_GetObjectRefType, 3758 3759 // Module features 3760 3761 jni_GetModule 3762 }; 3763 3764 3765 // For jvmti use to modify jni function table. 3766 // Java threads in native contiues to run until it is transitioned 3767 // to VM at safepoint. Before the transition or before it is blocked 3768 // for safepoint it may access jni function table. VM could crash if 3769 // any java thread access the jni function table in the middle of memcpy. 3770 // To avoid this each function pointers are copied automically. 3771 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3772 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3773 intptr_t *a = (intptr_t *) jni_functions(); 3774 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3775 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3776 Atomic::store(*b++, a++); 3777 } 3778 } 3779 3780 void quicken_jni_functions() { 3781 // Replace Get<Primitive>Field with fast versions 3782 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3783 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) { 3784 address func; 3785 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3786 if (func != (address)-1) { 3787 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3788 } 3789 func = JNI_FastGetField::generate_fast_get_byte_field(); 3790 if (func != (address)-1) { 3791 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3792 } 3793 func = JNI_FastGetField::generate_fast_get_char_field(); 3794 if (func != (address)-1) { 3795 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3796 } 3797 func = JNI_FastGetField::generate_fast_get_short_field(); 3798 if (func != (address)-1) { 3799 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3800 } 3801 func = JNI_FastGetField::generate_fast_get_int_field(); 3802 if (func != (address)-1) { 3803 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3804 } 3805 func = JNI_FastGetField::generate_fast_get_long_field(); 3806 if (func != (address)-1) { 3807 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3808 } 3809 func = JNI_FastGetField::generate_fast_get_float_field(); 3810 if (func != (address)-1) { 3811 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3812 } 3813 func = JNI_FastGetField::generate_fast_get_double_field(); 3814 if (func != (address)-1) { 3815 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3816 } 3817 } 3818 } 3819 3820 // Returns the function structure 3821 struct JNINativeInterface_* jni_functions() { 3822 #if INCLUDE_JNI_CHECK 3823 if (CheckJNICalls) return jni_functions_check(); 3824 #endif // INCLUDE_JNI_CHECK 3825 return &jni_NativeInterface; 3826 } 3827 3828 // Returns the function structure 3829 struct JNINativeInterface_* jni_functions_nocheck() { 3830 return &jni_NativeInterface; 3831 } 3832 3833 static void post_thread_start_event(const JavaThread* jt) { 3834 assert(jt != NULL, "invariant"); 3835 EventThreadStart event; 3836 if (event.should_commit()) { 3837 event.set_thread(JFR_THREAD_ID(jt)); 3838 event.commit(); 3839 } 3840 } 3841 3842 // Invocation API 3843 3844 3845 // Forward declaration 3846 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3847 3848 // Global invocation API vars 3849 volatile int vm_created = 0; 3850 // Indicate whether it is safe to recreate VM 3851 volatile int safe_to_recreate_vm = 1; 3852 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3853 3854 3855 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3856 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3857 3858 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3859 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3860 3861 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3862 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3863 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3864 jint ret = JNI_ERR; 3865 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3866 3867 if (Threads::is_supported_jni_version(args->version)) { 3868 ret = JNI_OK; 3869 } 3870 // 1.1 style no longer supported in hotspot. 3871 // According the JNI spec, we should update args->version on return. 3872 // We also use the structure to communicate with launcher about default 3873 // stack size. 3874 if (args->version == JNI_VERSION_1_1) { 3875 args->version = JNI_VERSION_1_2; 3876 // javaStackSize is int in arguments structure 3877 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3878 args->javaStackSize = (jint)(ThreadStackSize * K); 3879 } 3880 return ret; 3881 } 3882 3883 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3884 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3885 3886 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3887 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3888 3889 jint result = JNI_ERR; 3890 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3891 3892 // We're about to use Atomic::xchg for synchronization. Some Zero 3893 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3894 // but __sync_lock_test_and_set is not guaranteed to do what we want 3895 // on all architectures. So we check it works before relying on it. 3896 #if defined(ZERO) && defined(ASSERT) 3897 { 3898 jint a = 0xcafebabe; 3899 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3900 void *c = &a; 3901 void *d = Atomic::xchg(&b, &c); 3902 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3903 assert(c == &b && d == &a, "Atomic::xchg() works"); 3904 } 3905 #endif // ZERO && ASSERT 3906 3907 // At the moment it's only possible to have one Java VM, 3908 // since some of the runtime state is in global variables. 3909 3910 // We cannot use our mutex locks here, since they only work on 3911 // Threads. We do an atomic compare and exchange to ensure only 3912 // one thread can call this method at a time 3913 3914 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3915 // the add/dec implementations are dependent on whether we are running 3916 // on a multiprocessor Atomic::xchg does not have this problem. 3917 if (Atomic::xchg(1, &vm_created) == 1) { 3918 return JNI_EEXIST; // already created, or create attempt in progress 3919 } 3920 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3921 return JNI_ERR; // someone tried and failed and retry not allowed. 3922 } 3923 3924 assert(vm_created == 1, "vm_created is true during the creation"); 3925 3926 /** 3927 * Certain errors during initialization are recoverable and do not 3928 * prevent this method from being called again at a later time 3929 * (perhaps with different arguments). However, at a certain 3930 * point during initialization if an error occurs we cannot allow 3931 * this function to be called again (or it will crash). In those 3932 * situations, the 'canTryAgain' flag is set to false, which atomically 3933 * sets safe_to_recreate_vm to 1, such that any new call to 3934 * JNI_CreateJavaVM will immediately fail using the above logic. 3935 */ 3936 bool can_try_again = true; 3937 3938 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3939 if (result == JNI_OK) { 3940 JavaThread *thread = JavaThread::current(); 3941 assert(!thread->has_pending_exception(), "should have returned not OK"); 3942 /* thread is thread_in_vm here */ 3943 *vm = (JavaVM *)(&main_vm); 3944 *(JNIEnv**)penv = thread->jni_environment(); 3945 3946 #if INCLUDE_JVMCI 3947 if (EnableJVMCI) { 3948 if (UseJVMCICompiler) { 3949 // JVMCI is initialized on a CompilerThread 3950 if (BootstrapJVMCI) { 3951 JavaThread* THREAD = thread; 3952 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3953 compiler->bootstrap(THREAD); 3954 if (HAS_PENDING_EXCEPTION) { 3955 HandleMark hm; 3956 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3957 } 3958 } 3959 } 3960 } 3961 #endif 3962 3963 // Notify JVMTI 3964 if (JvmtiExport::should_post_thread_life()) { 3965 JvmtiExport::post_thread_start(thread); 3966 } 3967 3968 post_thread_start_event(thread); 3969 3970 #ifndef PRODUCT 3971 if (ReplayCompiles) ciReplay::replay(thread); 3972 3973 // Some platforms (like Win*) need a wrapper around these test 3974 // functions in order to properly handle error conditions. 3975 VMError::test_error_handler(); 3976 #endif 3977 3978 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3979 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 3980 } else { 3981 // If create_vm exits because of a pending exception, exit with that 3982 // exception. In the future when we figure out how to reclaim memory, 3983 // we may be able to exit with JNI_ERR and allow the calling application 3984 // to continue. 3985 if (Universe::is_fully_initialized()) { 3986 // otherwise no pending exception possible - VM will already have aborted 3987 JavaThread* THREAD = JavaThread::current(); 3988 if (HAS_PENDING_EXCEPTION) { 3989 HandleMark hm; 3990 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3991 } 3992 } 3993 3994 if (can_try_again) { 3995 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3996 safe_to_recreate_vm = 1; 3997 } 3998 3999 // Creation failed. We must reset vm_created 4000 *vm = 0; 4001 *(JNIEnv**)penv = 0; 4002 // reset vm_created last to avoid race condition. Use OrderAccess to 4003 // control both compiler and architectural-based reordering. 4004 OrderAccess::release_store(&vm_created, 0); 4005 } 4006 4007 // Flush stdout and stderr before exit. 4008 fflush(stdout); 4009 fflush(stderr); 4010 4011 return result; 4012 4013 } 4014 4015 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4016 jint result = JNI_ERR; 4017 // On Windows, let CreateJavaVM run with SEH protection 4018 #ifdef _WIN32 4019 __try { 4020 #endif 4021 result = JNI_CreateJavaVM_inner(vm, penv, args); 4022 #ifdef _WIN32 4023 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4024 // Nothing to do. 4025 } 4026 #endif 4027 return result; 4028 } 4029 4030 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4031 // See bug 4367188, the wrapper can sometimes cause VM crashes 4032 // JNIWrapper("GetCreatedJavaVMs"); 4033 4034 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4035 4036 if (vm_created == 1) { 4037 if (numVMs != NULL) *numVMs = 1; 4038 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4039 } else { 4040 if (numVMs != NULL) *numVMs = 0; 4041 } 4042 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4043 return JNI_OK; 4044 } 4045 4046 extern "C" { 4047 4048 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4049 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4050 4051 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4052 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4053 jint res = JNI_ERR; 4054 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4055 4056 if (vm_created == 0) { 4057 res = JNI_ERR; 4058 return res; 4059 } 4060 4061 JNIWrapper("DestroyJavaVM"); 4062 JNIEnv *env; 4063 JavaVMAttachArgs destroyargs; 4064 destroyargs.version = CurrentVersion; 4065 destroyargs.name = (char *)"DestroyJavaVM"; 4066 destroyargs.group = NULL; 4067 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4068 if (res != JNI_OK) { 4069 return res; 4070 } 4071 4072 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4073 JavaThread* thread = JavaThread::current(); 4074 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4075 if (Threads::destroy_vm()) { 4076 // Should not change thread state, VM is gone 4077 vm_created = 0; 4078 res = JNI_OK; 4079 return res; 4080 } else { 4081 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native); 4082 res = JNI_ERR; 4083 return res; 4084 } 4085 } 4086 4087 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4088 jint result = JNI_ERR; 4089 // On Windows, we need SEH protection 4090 #ifdef _WIN32 4091 __try { 4092 #endif 4093 result = jni_DestroyJavaVM_inner(vm); 4094 #ifdef _WIN32 4095 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4096 // Nothing to do. 4097 } 4098 #endif 4099 return result; 4100 } 4101 4102 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4103 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4104 4105 // Check below commented out from JDK1.2fcs as well 4106 /* 4107 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4108 return JNI_EVERSION; 4109 } 4110 */ 4111 4112 Thread* t = Thread::current_or_null(); 4113 if (t != NULL) { 4114 // If the thread has been attached this operation is a no-op 4115 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4116 return JNI_OK; 4117 } 4118 4119 // Create a thread and mark it as attaching so it will be skipped by the 4120 // ThreadsListEnumerator - see CR 6404306 4121 JavaThread* thread = new JavaThread(true); 4122 4123 // Set correct safepoint info. The thread is going to call into Java when 4124 // initializing the Java level thread object. Hence, the correct state must 4125 // be set in order for the Safepoint code to deal with it correctly. 4126 thread->set_thread_state(_thread_in_vm); 4127 thread->record_stack_base_and_size(); 4128 thread->register_thread_stack_with_NMT(); 4129 thread->initialize_thread_current(); 4130 4131 if (!os::create_attached_thread(thread)) { 4132 thread->smr_delete(); 4133 return JNI_ERR; 4134 } 4135 // Enable stack overflow checks 4136 thread->create_stack_guard_pages(); 4137 4138 thread->initialize_tlab(); 4139 4140 thread->cache_global_variables(); 4141 4142 // Crucial that we do not have a safepoint check for this thread, since it has 4143 // not been added to the Thread list yet. 4144 { Threads_lock->lock_without_safepoint_check(); 4145 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4146 // avoid this thread trying to do a GC before it is added to the thread-list 4147 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4148 Threads::add(thread, daemon); 4149 Threads_lock->unlock(); 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 };