1 /* 2 * Copyright (c) 1997, 2018, 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/vm_operations.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 static bool first_time_FindClass = true; 369 370 DT_RETURN_MARK_DECL(FindClass, jclass 371 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 372 373 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 374 JNIWrapper("FindClass"); 375 376 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 377 378 jclass result = NULL; 379 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 380 381 // Remember if we are the first invocation of jni_FindClass 382 bool first_time = first_time_FindClass; 383 first_time_FindClass = false; 384 385 // Sanity check the name: it cannot be null or larger than the maximum size 386 // name we can fit in the constant pool. 387 if (name == NULL) { 388 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 389 } 390 if ((int)strlen(name) > Symbol::max_length()) { 391 Exceptions::fthrow(THREAD_AND_LOCATION, 392 vmSymbols::java_lang_NoClassDefFoundError(), 393 "Class name exceeds maximum length of %d: %s", 394 Symbol::max_length(), 395 name); 396 return 0; 397 } 398 399 //%note jni_3 400 Handle protection_domain; 401 // Find calling class 402 Klass* k = thread->security_get_caller_class(0); 403 // default to the system loader when no context 404 Handle loader(THREAD, SystemDictionary::java_system_loader()); 405 if (k != NULL) { 406 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 407 // in the correct class context. 408 if (k->class_loader() == NULL && 409 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 410 JavaValue result(T_OBJECT); 411 JavaCalls::call_static(&result, k, 412 vmSymbols::getFromClass_name(), 413 vmSymbols::void_class_signature(), 414 CHECK_NULL); 415 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 416 // a non-NULL Class object. When invoked from JNI_OnUnload, 417 // it will return NULL to indicate no context. 418 oop mirror = (oop) result.get_jobject(); 419 if (mirror != NULL) { 420 Klass* fromClass = java_lang_Class::as_Klass(mirror); 421 loader = Handle(THREAD, fromClass->class_loader()); 422 protection_domain = Handle(THREAD, fromClass->protection_domain()); 423 } 424 } else { 425 loader = Handle(THREAD, k->class_loader()); 426 } 427 } 428 429 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 430 result = find_class_from_class_loader(env, sym, true, loader, 431 protection_domain, true, thread); 432 433 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 434 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 435 } 436 437 // If we were the first invocation of jni_FindClass, we enable compilation again 438 // rather than just allowing invocation counter to overflow and decay. 439 // Controlled by flag DelayCompilationDuringStartup. 440 if (first_time && !CompileTheWorld) 441 CompilationPolicy::completed_vm_startup(); 442 443 return result; 444 JNI_END 445 446 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 447 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 448 449 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 450 JNIWrapper("FromReflectedMethod"); 451 452 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 453 454 jmethodID ret = NULL; 455 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 456 457 // method is a handle to a java.lang.reflect.Method object 458 oop reflected = JNIHandles::resolve_non_null(method); 459 oop mirror = NULL; 460 int slot = 0; 461 462 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 463 mirror = java_lang_reflect_Constructor::clazz(reflected); 464 slot = java_lang_reflect_Constructor::slot(reflected); 465 } else { 466 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 467 mirror = java_lang_reflect_Method::clazz(reflected); 468 slot = java_lang_reflect_Method::slot(reflected); 469 } 470 Klass* k1 = java_lang_Class::as_Klass(mirror); 471 472 // Make sure class is initialized before handing id's out to methods 473 k1->initialize(CHECK_NULL); 474 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 475 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 476 return ret; 477 JNI_END 478 479 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 480 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 481 482 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 483 JNIWrapper("FromReflectedField"); 484 485 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 486 487 jfieldID ret = NULL; 488 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 489 490 // field is a handle to a java.lang.reflect.Field object 491 oop reflected = JNIHandles::resolve_non_null(field); 492 oop mirror = java_lang_reflect_Field::clazz(reflected); 493 Klass* k1 = java_lang_Class::as_Klass(mirror); 494 int slot = java_lang_reflect_Field::slot(reflected); 495 int modifiers = java_lang_reflect_Field::modifiers(reflected); 496 497 // Make sure class is initialized before handing id's out to fields 498 k1->initialize(CHECK_NULL); 499 500 // First check if this is a static field 501 if (modifiers & JVM_ACC_STATIC) { 502 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 503 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 504 assert(id != NULL, "corrupt Field object"); 505 debug_only(id->set_is_static_field_id();) 506 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 507 ret = jfieldIDWorkaround::to_static_jfieldID(id); 508 return ret; 509 } 510 511 // The slot is the index of the field description in the field-array 512 // The jfieldID is the offset of the field within the object 513 // It may also have hash bits for k, if VerifyJNIFields is turned on. 514 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 515 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 516 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 517 return ret; 518 JNI_END 519 520 521 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 522 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 523 524 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 525 JNIWrapper("ToReflectedMethod"); 526 527 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 528 529 jobject ret = NULL; 530 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 531 532 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 533 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 534 oop reflection_method; 535 if (m->is_initializer()) { 536 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 537 } else { 538 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 539 } 540 ret = JNIHandles::make_local(env, reflection_method); 541 return ret; 542 JNI_END 543 544 DT_RETURN_MARK_DECL(GetSuperclass, jclass 545 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 546 547 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 548 JNIWrapper("GetSuperclass"); 549 550 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 551 552 jclass obj = NULL; 553 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 554 555 oop mirror = JNIHandles::resolve_non_null(sub); 556 // primitive classes return NULL 557 if (java_lang_Class::is_primitive(mirror)) return NULL; 558 559 // Rules of Class.getSuperClass as implemented by KLass::java_super: 560 // arrays return Object 561 // interfaces return NULL 562 // proper classes return Klass::super() 563 Klass* k = java_lang_Class::as_Klass(mirror); 564 if (k->is_interface()) return NULL; 565 566 // return mirror for superclass 567 Klass* super = k->java_super(); 568 // super2 is the value computed by the compiler's getSuperClass intrinsic: 569 debug_only(Klass* super2 = ( k->is_array_klass() 570 ? SystemDictionary::Object_klass() 571 : k->super() ) ); 572 assert(super == super2, 573 "java_super computation depends on interface, array, other super"); 574 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 575 return obj; 576 JNI_END 577 578 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 579 JNIWrapper("IsSubclassOf"); 580 581 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 582 583 oop sub_mirror = JNIHandles::resolve_non_null(sub); 584 oop super_mirror = JNIHandles::resolve_non_null(super); 585 if (java_lang_Class::is_primitive(sub_mirror) || 586 java_lang_Class::is_primitive(super_mirror)) { 587 jboolean ret = oopDesc::equals(sub_mirror, super_mirror); 588 589 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 590 return ret; 591 } 592 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 593 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 594 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 595 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 596 JNI_TRUE : JNI_FALSE; 597 598 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 599 return ret; 600 JNI_END 601 602 603 DT_RETURN_MARK_DECL(Throw, jint 604 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 605 606 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 607 JNIWrapper("Throw"); 608 609 HOTSPOT_JNI_THROW_ENTRY(env, obj); 610 611 jint ret = JNI_OK; 612 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 613 614 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 615 ShouldNotReachHere(); 616 return 0; // Mute compiler. 617 JNI_END 618 619 620 DT_RETURN_MARK_DECL(ThrowNew, jint 621 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 622 623 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 624 JNIWrapper("ThrowNew"); 625 626 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 627 628 jint ret = JNI_OK; 629 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 630 631 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 632 Symbol* name = k->name(); 633 Handle class_loader (THREAD, k->class_loader()); 634 Handle protection_domain (THREAD, k->protection_domain()); 635 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 636 ShouldNotReachHere(); 637 return 0; // Mute compiler. 638 JNI_END 639 640 641 // JNI functions only transform a pending async exception to a synchronous 642 // exception in ExceptionOccurred and ExceptionCheck calls, since 643 // delivering an async exception in other places won't change the native 644 // code's control flow and would be harmful when native code further calls 645 // JNI functions with a pending exception. Async exception is also checked 646 // during the call, so ExceptionOccurred/ExceptionCheck won't return 647 // false but deliver the async exception at the very end during 648 // state transition. 649 650 static void jni_check_async_exceptions(JavaThread *thread) { 651 assert(thread == Thread::current(), "must be itself"); 652 thread->check_and_handle_async_exceptions(); 653 } 654 655 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 656 JNIWrapper("ExceptionOccurred"); 657 658 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 659 660 jni_check_async_exceptions(thread); 661 oop exception = thread->pending_exception(); 662 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 663 664 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 665 return ret; 666 JNI_END 667 668 669 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 670 JNIWrapper("ExceptionDescribe"); 671 672 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 673 674 if (thread->has_pending_exception()) { 675 Handle ex(thread, thread->pending_exception()); 676 thread->clear_pending_exception(); 677 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 678 // Don't print anything if we are being killed. 679 } else { 680 jio_fprintf(defaultStream::error_stream(), "Exception "); 681 if (thread != NULL && thread->threadObj() != NULL) { 682 ResourceMark rm(THREAD); 683 jio_fprintf(defaultStream::error_stream(), 684 "in thread \"%s\" ", thread->get_thread_name()); 685 } 686 if (ex->is_a(SystemDictionary::Throwable_klass())) { 687 JavaValue result(T_VOID); 688 JavaCalls::call_virtual(&result, 689 ex, 690 SystemDictionary::Throwable_klass(), 691 vmSymbols::printStackTrace_name(), 692 vmSymbols::void_method_signature(), 693 THREAD); 694 // If an exception is thrown in the call it gets thrown away. Not much 695 // we can do with it. The native code that calls this, does not check 696 // for the exception - hence, it might still be in the thread when DestroyVM gets 697 // called, potentially causing a few asserts to trigger - since no pending exception 698 // is expected. 699 CLEAR_PENDING_EXCEPTION; 700 } else { 701 ResourceMark rm(THREAD); 702 jio_fprintf(defaultStream::error_stream(), 703 ". Uncaught exception of type %s.", 704 ex->klass()->external_name()); 705 } 706 } 707 } 708 709 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 710 JNI_END 711 712 713 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 714 JNIWrapper("ExceptionClear"); 715 716 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 717 718 // The jni code might be using this API to clear java thrown exception. 719 // So just mark jvmti thread exception state as exception caught. 720 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 721 if (state != NULL && state->is_exception_detected()) { 722 state->set_exception_caught(); 723 } 724 thread->clear_pending_exception(); 725 726 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 727 JNI_END 728 729 730 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 731 JNIWrapper("FatalError"); 732 733 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 734 735 tty->print_cr("FATAL ERROR in native method: %s", msg); 736 thread->print_stack(); 737 os::abort(); // Dump core and abort 738 JNI_END 739 740 741 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 742 JNIWrapper("PushLocalFrame"); 743 744 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 745 746 //%note jni_11 747 if (capacity < 0 || 748 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 750 return JNI_ERR; 751 } 752 JNIHandleBlock* old_handles = thread->active_handles(); 753 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 754 assert(new_handles != NULL, "should not be NULL"); 755 new_handles->set_pop_frame_link(old_handles); 756 thread->set_active_handles(new_handles); 757 jint ret = JNI_OK; 758 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 759 return ret; 760 JNI_END 761 762 763 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 764 JNIWrapper("PopLocalFrame"); 765 766 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 767 768 //%note jni_11 769 Handle result_handle(thread, JNIHandles::resolve(result)); 770 JNIHandleBlock* old_handles = thread->active_handles(); 771 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 772 if (new_handles != NULL) { 773 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 774 // This way code will still work if PopLocalFrame is called without a corresponding 775 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 776 // the release_block call will release the blocks. 777 thread->set_active_handles(new_handles); 778 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 779 JNIHandleBlock::release_block(old_handles, thread); // may block 780 result = JNIHandles::make_local(thread, result_handle()); 781 } 782 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 783 return result; 784 JNI_END 785 786 787 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 788 JNIWrapper("NewGlobalRef"); 789 790 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 791 792 Handle ref_handle(thread, JNIHandles::resolve(ref)); 793 jobject ret = JNIHandles::make_global(ref_handle); 794 795 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 796 return ret; 797 JNI_END 798 799 // Must be JNI_ENTRY (with HandleMark) 800 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 801 JNIWrapper("DeleteGlobalRef"); 802 803 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 804 805 JNIHandles::destroy_global(ref); 806 807 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 808 JNI_END 809 810 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 811 JNIWrapper("DeleteLocalRef"); 812 813 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 814 815 JNIHandles::destroy_local(obj); 816 817 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 818 JNI_END 819 820 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 821 JNIWrapper("IsSameObject"); 822 823 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 824 825 oop a = JNIHandles::resolve(r1); 826 oop b = JNIHandles::resolve(r2); 827 jboolean ret = oopDesc::equals(a, b) ? JNI_TRUE : JNI_FALSE; 828 829 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 830 return ret; 831 JNI_END 832 833 834 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 835 JNIWrapper("NewLocalRef"); 836 837 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 838 839 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 840 841 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 842 return ret; 843 JNI_END 844 845 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 846 JNIWrapper("EnsureLocalCapacity"); 847 848 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 849 850 jint ret; 851 if (capacity >= 0 && 852 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 853 ret = JNI_OK; 854 } else { 855 ret = JNI_ERR; 856 } 857 858 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 859 return ret; 860 JNI_END 861 862 // Return the Handle Type 863 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 864 JNIWrapper("GetObjectRefType"); 865 866 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 867 868 jobjectRefType ret = JNIInvalidRefType; 869 if (obj != NULL) { 870 ret = JNIHandles::handle_type(thread, obj); 871 } 872 873 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 874 return ret; 875 JNI_END 876 877 878 class JNI_ArgumentPusher : public SignatureIterator { 879 protected: 880 JavaCallArguments* _arguments; 881 882 virtual void get_bool () = 0; 883 virtual void get_char () = 0; 884 virtual void get_short () = 0; 885 virtual void get_byte () = 0; 886 virtual void get_int () = 0; 887 virtual void get_long () = 0; 888 virtual void get_float () = 0; 889 virtual void get_double () = 0; 890 virtual void get_object () = 0; 891 892 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 893 this->_return_type = T_ILLEGAL; 894 _arguments = NULL; 895 } 896 897 public: 898 virtual void iterate( uint64_t fingerprint ) = 0; 899 900 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 901 902 inline void do_bool() { if (!is_return_type()) get_bool(); } 903 inline void do_char() { if (!is_return_type()) get_char(); } 904 inline void do_short() { if (!is_return_type()) get_short(); } 905 inline void do_byte() { if (!is_return_type()) get_byte(); } 906 inline void do_int() { if (!is_return_type()) get_int(); } 907 inline void do_long() { if (!is_return_type()) get_long(); } 908 inline void do_float() { if (!is_return_type()) get_float(); } 909 inline void do_double() { if (!is_return_type()) get_double(); } 910 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 911 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 912 inline void do_void() { } 913 914 JavaCallArguments* arguments() { return _arguments; } 915 void push_receiver(Handle h) { _arguments->push_oop(h); } 916 }; 917 918 919 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 920 protected: 921 va_list _ap; 922 923 inline void get_bool() { 924 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 925 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 926 // TemplateInterpreterGenerator::generate_result_handler_for and 927 // SharedRuntime::generate_native_wrapper. 928 jboolean b = va_arg(_ap, jint); 929 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 930 } 931 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 932 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 933 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 934 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 935 936 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 937 938 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 939 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 940 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 941 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 942 943 inline void set_ap(va_list rap) { 944 va_copy(_ap, rap); 945 } 946 947 public: 948 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 949 : JNI_ArgumentPusher(signature) { 950 set_ap(rap); 951 } 952 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 953 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 954 set_ap(rap); 955 } 956 957 // Optimized path if we have the bitvector form of signature 958 void iterate( uint64_t fingerprint ) { 959 if (fingerprint == (uint64_t)CONST64(-1)) { 960 SignatureIterator::iterate(); // Must be too many arguments 961 } else { 962 _return_type = (BasicType)((fingerprint >> static_feature_size) & 963 result_feature_mask); 964 965 assert(fingerprint, "Fingerprint should not be 0"); 966 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 967 while ( 1 ) { 968 switch ( fingerprint & parameter_feature_mask ) { 969 case bool_parm: 970 get_bool(); 971 break; 972 case char_parm: 973 get_char(); 974 break; 975 case short_parm: 976 get_short(); 977 break; 978 case byte_parm: 979 get_byte(); 980 break; 981 case int_parm: 982 get_int(); 983 break; 984 case obj_parm: 985 get_object(); 986 break; 987 case long_parm: 988 get_long(); 989 break; 990 case float_parm: 991 get_float(); 992 break; 993 case double_parm: 994 get_double(); 995 break; 996 case done_parm: 997 return; 998 break; 999 default: 1000 ShouldNotReachHere(); 1001 break; 1002 } 1003 fingerprint >>= parameter_feature_size; 1004 } 1005 } 1006 } 1007 }; 1008 1009 1010 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1011 protected: 1012 const jvalue *_ap; 1013 1014 inline void get_bool() { 1015 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1016 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1017 // TemplateInterpreterGenerator::generate_result_handler_for and 1018 // SharedRuntime::generate_native_wrapper. 1019 jboolean b = (_ap++)->z; 1020 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1021 } 1022 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1023 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1024 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1025 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1026 1027 inline void get_long() { _arguments->push_long((_ap++)->j); } 1028 inline void get_float() { _arguments->push_float((_ap++)->f); } 1029 inline void get_double() { _arguments->push_double((_ap++)->d);} 1030 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1031 1032 inline void set_ap(const jvalue *rap) { _ap = rap; } 1033 1034 public: 1035 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1036 : JNI_ArgumentPusher(signature) { 1037 set_ap(rap); 1038 } 1039 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1040 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1041 set_ap(rap); 1042 } 1043 1044 // Optimized path if we have the bitvector form of signature 1045 void iterate( uint64_t fingerprint ) { 1046 if (fingerprint == (uint64_t)CONST64(-1)) { 1047 SignatureIterator::iterate(); // Must be too many arguments 1048 } else { 1049 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1050 result_feature_mask); 1051 assert(fingerprint, "Fingerprint should not be 0"); 1052 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1053 while ( 1 ) { 1054 switch ( fingerprint & parameter_feature_mask ) { 1055 case bool_parm: 1056 get_bool(); 1057 break; 1058 case char_parm: 1059 get_char(); 1060 break; 1061 case short_parm: 1062 get_short(); 1063 break; 1064 case byte_parm: 1065 get_byte(); 1066 break; 1067 case int_parm: 1068 get_int(); 1069 break; 1070 case obj_parm: 1071 get_object(); 1072 break; 1073 case long_parm: 1074 get_long(); 1075 break; 1076 case float_parm: 1077 get_float(); 1078 break; 1079 case double_parm: 1080 get_double(); 1081 break; 1082 case done_parm: 1083 return; 1084 break; 1085 default: 1086 ShouldNotReachHere(); 1087 break; 1088 } 1089 fingerprint >>= parameter_feature_size; 1090 } 1091 } 1092 } 1093 }; 1094 1095 1096 enum JNICallType { 1097 JNI_STATIC, 1098 JNI_VIRTUAL, 1099 JNI_NONVIRTUAL 1100 }; 1101 1102 1103 1104 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1105 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1106 1107 // Create object to hold arguments for the JavaCall, and associate it with 1108 // the jni parser 1109 ResourceMark rm(THREAD); 1110 int number_of_parameters = method->size_of_parameters(); 1111 JavaCallArguments java_args(number_of_parameters); 1112 args->set_java_argument_object(&java_args); 1113 1114 assert(method->is_static(), "method should be static"); 1115 1116 // Fill out JavaCallArguments object 1117 args->iterate( Fingerprinter(method).fingerprint() ); 1118 // Initialize result type 1119 result->set_type(args->get_ret_type()); 1120 1121 // Invoke the method. Result is returned as oop. 1122 JavaCalls::call(result, method, &java_args, CHECK); 1123 1124 // Convert result 1125 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1126 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1127 } 1128 } 1129 1130 1131 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1132 oop recv = JNIHandles::resolve(receiver); 1133 if (recv == NULL) { 1134 THROW(vmSymbols::java_lang_NullPointerException()); 1135 } 1136 Handle h_recv(THREAD, recv); 1137 1138 int number_of_parameters; 1139 Method* selected_method; 1140 { 1141 Method* m = Method::resolve_jmethod_id(method_id); 1142 number_of_parameters = m->size_of_parameters(); 1143 Klass* holder = m->method_holder(); 1144 if (call_type != JNI_VIRTUAL) { 1145 selected_method = m; 1146 } else if (!m->has_itable_index()) { 1147 // non-interface call -- for that little speed boost, don't handlize 1148 debug_only(NoSafepointVerifier nosafepoint;) 1149 // jni_GetMethodID makes sure class is linked and initialized 1150 // so m should have a valid vtable index. 1151 assert(m->valid_vtable_index(), "no valid vtable index"); 1152 int vtbl_index = m->vtable_index(); 1153 if (vtbl_index != Method::nonvirtual_vtable_index) { 1154 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1155 } else { 1156 // final method 1157 selected_method = m; 1158 } 1159 } else { 1160 // interface call 1161 int itbl_index = m->itable_index(); 1162 Klass* k = h_recv->klass(); 1163 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1164 } 1165 } 1166 1167 methodHandle method(THREAD, selected_method); 1168 1169 // Create object to hold arguments for the JavaCall, and associate it with 1170 // the jni parser 1171 ResourceMark rm(THREAD); 1172 JavaCallArguments java_args(number_of_parameters); 1173 args->set_java_argument_object(&java_args); 1174 1175 // handle arguments 1176 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1177 args->push_receiver(h_recv); // Push jobject handle 1178 1179 // Fill out JavaCallArguments object 1180 args->iterate( Fingerprinter(method).fingerprint() ); 1181 // Initialize result type 1182 result->set_type(args->get_ret_type()); 1183 1184 // Invoke the method. Result is returned as oop. 1185 JavaCalls::call(result, method, &java_args, CHECK); 1186 1187 // Convert result 1188 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1190 } 1191 } 1192 1193 1194 static instanceOop alloc_object(jclass clazz, TRAPS) { 1195 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1196 if (k == NULL) { 1197 ResourceMark rm(THREAD); 1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1199 } 1200 k->check_valid_for_instantiation(false, CHECK_NULL); 1201 k->initialize(CHECK_NULL); 1202 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1203 return ih; 1204 } 1205 1206 DT_RETURN_MARK_DECL(AllocObject, jobject 1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1208 1209 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1210 JNIWrapper("AllocObject"); 1211 1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1213 1214 jobject ret = NULL; 1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1216 1217 instanceOop i = alloc_object(clazz, CHECK_NULL); 1218 ret = JNIHandles::make_local(env, i); 1219 return ret; 1220 JNI_END 1221 1222 DT_RETURN_MARK_DECL(NewObjectA, jobject 1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1224 1225 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1226 JNIWrapper("NewObjectA"); 1227 1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1229 1230 jobject obj = NULL; 1231 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1232 1233 instanceOop i = alloc_object(clazz, CHECK_NULL); 1234 obj = JNIHandles::make_local(env, i); 1235 JavaValue jvalue(T_VOID); 1236 JNI_ArgumentPusherArray ap(methodID, args); 1237 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1238 return obj; 1239 JNI_END 1240 1241 1242 DT_RETURN_MARK_DECL(NewObjectV, jobject 1243 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1244 1245 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1246 JNIWrapper("NewObjectV"); 1247 1248 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1249 1250 jobject obj = NULL; 1251 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1252 1253 instanceOop i = alloc_object(clazz, CHECK_NULL); 1254 obj = JNIHandles::make_local(env, i); 1255 JavaValue jvalue(T_VOID); 1256 JNI_ArgumentPusherVaArg ap(methodID, args); 1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1258 return obj; 1259 JNI_END 1260 1261 1262 DT_RETURN_MARK_DECL(NewObject, jobject 1263 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1264 1265 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1266 JNIWrapper("NewObject"); 1267 1268 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1269 1270 jobject obj = NULL; 1271 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1272 1273 instanceOop i = alloc_object(clazz, CHECK_NULL); 1274 obj = JNIHandles::make_local(env, i); 1275 va_list args; 1276 va_start(args, methodID); 1277 JavaValue jvalue(T_VOID); 1278 JNI_ArgumentPusherVaArg ap(methodID, args); 1279 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1280 va_end(args); 1281 return obj; 1282 JNI_END 1283 1284 1285 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1286 JNIWrapper("GetObjectClass"); 1287 1288 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1289 1290 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1291 jclass ret = 1292 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1293 1294 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1295 return ret; 1296 JNI_END 1297 1298 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1299 JNIWrapper("IsInstanceOf"); 1300 1301 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1302 1303 jboolean ret = JNI_TRUE; 1304 if (obj != NULL) { 1305 ret = JNI_FALSE; 1306 Klass* k = java_lang_Class::as_Klass( 1307 JNIHandles::resolve_non_null(clazz)); 1308 if (k != NULL) { 1309 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1310 } 1311 } 1312 1313 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1314 return ret; 1315 JNI_END 1316 1317 1318 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1319 const char *sig, bool is_static, TRAPS) { 1320 // %%%% This code should probably just call into a method in the LinkResolver 1321 // 1322 // The class should have been loaded (we have an instance of the class 1323 // passed in) so the method and signature should already be in the symbol 1324 // table. If they're not there, the method doesn't exist. 1325 const char *name_to_probe = (name_str == NULL) 1326 ? vmSymbols::object_initializer_name()->as_C_string() 1327 : name_str; 1328 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1329 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1330 1331 if (name == NULL || signature == NULL) { 1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1333 } 1334 1335 // Throw a NoSuchMethodError exception if we have an instance of a 1336 // primitive java.lang.Class 1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1338 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1339 } 1340 1341 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1342 1343 // Make sure class is linked and initialized before handing id's out to 1344 // Method*s. 1345 klass->initialize(CHECK_NULL); 1346 1347 Method* m; 1348 if (name == vmSymbols::object_initializer_name() || 1349 name == vmSymbols::class_initializer_name()) { 1350 // Never search superclasses for constructors 1351 if (klass->is_instance_klass()) { 1352 m = InstanceKlass::cast(klass)->find_method(name, signature); 1353 } else { 1354 m = NULL; 1355 } 1356 } else { 1357 m = klass->lookup_method(name, signature); 1358 if (m == NULL && klass->is_instance_klass()) { 1359 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1360 } 1361 } 1362 if (m == NULL || (m->is_static() != is_static)) { 1363 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1364 } 1365 return m->jmethod_id(); 1366 } 1367 1368 1369 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1370 const char *name, const char *sig)) 1371 JNIWrapper("GetMethodID"); 1372 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1373 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1374 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1375 return ret; 1376 JNI_END 1377 1378 1379 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1380 const char *name, const char *sig)) 1381 JNIWrapper("GetStaticMethodID"); 1382 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1383 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1384 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1385 return ret; 1386 JNI_END 1387 1388 1389 1390 // 1391 // Calling Methods 1392 // 1393 1394 1395 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1396 , EntryProbe, ReturnProbe) \ 1397 \ 1398 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1399 , ReturnProbe); \ 1400 \ 1401 JNI_ENTRY(ResultType, \ 1402 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1403 JNIWrapper("Call" XSTR(Result) "Method"); \ 1404 \ 1405 EntryProbe; \ 1406 ResultType ret = 0;\ 1407 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1408 (const ResultType&)ret);\ 1409 \ 1410 va_list args; \ 1411 va_start(args, methodID); \ 1412 JavaValue jvalue(Tag); \ 1413 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1414 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1415 va_end(args); \ 1416 ret = jvalue.get_##ResultType(); \ 1417 return ret;\ 1418 JNI_END 1419 1420 // the runtime type of subword integral basic types is integer 1421 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1422 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1423 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1424 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1425 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1426 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1427 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1428 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1429 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1430 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1431 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1432 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1433 1434 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1435 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1436 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1437 DEFINE_CALLMETHOD(jint, Int, T_INT, 1438 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1439 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1440 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1441 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1442 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1443 // Float and double probes don't return value because dtrace doesn't currently support it 1444 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1445 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1446 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1447 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1448 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1449 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1450 1451 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1452 , EntryProbe, ReturnProbe) \ 1453 \ 1454 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1455 , ReturnProbe); \ 1456 \ 1457 JNI_ENTRY(ResultType, \ 1458 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1459 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1460 \ 1461 EntryProbe;\ 1462 ResultType ret = 0;\ 1463 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1464 (const ResultType&)ret);\ 1465 \ 1466 JavaValue jvalue(Tag); \ 1467 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1468 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1469 ret = jvalue.get_##ResultType(); \ 1470 return ret;\ 1471 JNI_END 1472 1473 // the runtime type of subword integral basic types is integer 1474 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1475 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1477 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1478 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1480 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1481 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1482 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1483 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1484 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1485 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1486 1487 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1488 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1489 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1490 DEFINE_CALLMETHODV(jint, Int, T_INT, 1491 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1492 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1493 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1494 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1495 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1496 // Float and double probes don't return value because dtrace doesn't currently support it 1497 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1498 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1499 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1500 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1501 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1502 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1503 1504 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1505 , EntryProbe, ReturnProbe) \ 1506 \ 1507 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1508 , ReturnProbe); \ 1509 \ 1510 JNI_ENTRY(ResultType, \ 1511 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1512 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1513 EntryProbe; \ 1514 ResultType ret = 0;\ 1515 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1516 (const ResultType&)ret);\ 1517 \ 1518 JavaValue jvalue(Tag); \ 1519 JNI_ArgumentPusherArray ap(methodID, args); \ 1520 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1521 ret = jvalue.get_##ResultType(); \ 1522 return ret;\ 1523 JNI_END 1524 1525 // the runtime type of subword integral basic types is integer 1526 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1527 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1529 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1530 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1531 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1532 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1533 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1534 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1535 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1536 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1537 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1538 1539 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1540 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1541 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1542 DEFINE_CALLMETHODA(jint, Int, T_INT, 1543 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1544 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1545 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1546 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1547 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1548 // Float and double probes don't return value because dtrace doesn't currently support it 1549 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1550 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1551 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1552 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1553 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1554 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1555 1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1559 1560 1561 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1562 JNIWrapper("CallVoidMethod"); 1563 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1564 DT_VOID_RETURN_MARK(CallVoidMethod); 1565 1566 va_list args; 1567 va_start(args, methodID); 1568 JavaValue jvalue(T_VOID); 1569 JNI_ArgumentPusherVaArg ap(methodID, args); 1570 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1571 va_end(args); 1572 JNI_END 1573 1574 1575 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1576 JNIWrapper("CallVoidMethodV"); 1577 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1578 DT_VOID_RETURN_MARK(CallVoidMethodV); 1579 1580 JavaValue jvalue(T_VOID); 1581 JNI_ArgumentPusherVaArg ap(methodID, args); 1582 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1583 JNI_END 1584 1585 1586 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1587 JNIWrapper("CallVoidMethodA"); 1588 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1589 DT_VOID_RETURN_MARK(CallVoidMethodA); 1590 1591 JavaValue jvalue(T_VOID); 1592 JNI_ArgumentPusherArray ap(methodID, args); 1593 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1594 JNI_END 1595 1596 1597 1598 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1599 , EntryProbe, ReturnProbe) \ 1600 \ 1601 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1602 , ReturnProbe);\ 1603 \ 1604 JNI_ENTRY(ResultType, \ 1605 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1606 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1607 \ 1608 EntryProbe;\ 1609 ResultType ret;\ 1610 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1611 (const ResultType&)ret);\ 1612 \ 1613 va_list args; \ 1614 va_start(args, methodID); \ 1615 JavaValue jvalue(Tag); \ 1616 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1617 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1618 va_end(args); \ 1619 ret = jvalue.get_##ResultType(); \ 1620 return ret;\ 1621 JNI_END 1622 1623 // the runtime type of subword integral basic types is integer 1624 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1625 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1627 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1628 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1629 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1630 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1631 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1632 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1633 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1634 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1635 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1636 1637 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1638 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1639 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1640 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1641 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1642 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1643 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1644 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1645 // Float and double probes don't return value because dtrace doesn't currently support it 1646 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1647 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1648 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1649 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1650 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1651 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1652 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1653 1654 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1655 , EntryProbe, ReturnProbe) \ 1656 \ 1657 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1658 , ReturnProbe);\ 1659 \ 1660 JNI_ENTRY(ResultType, \ 1661 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1662 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1663 \ 1664 EntryProbe;\ 1665 ResultType ret;\ 1666 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1667 (const ResultType&)ret);\ 1668 \ 1669 JavaValue jvalue(Tag); \ 1670 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1671 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1672 ret = jvalue.get_##ResultType(); \ 1673 return ret;\ 1674 JNI_END 1675 1676 // the runtime type of subword integral basic types is integer 1677 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1678 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1680 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1681 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1683 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1684 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1685 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1686 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1687 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1689 1690 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1691 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1692 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1693 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1694 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1695 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1696 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1697 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1698 // Float and double probes don't return value because dtrace doesn't currently support it 1699 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1700 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1701 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1702 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1703 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1704 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1705 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1706 1707 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1708 , EntryProbe, ReturnProbe) \ 1709 \ 1710 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1711 , ReturnProbe);\ 1712 \ 1713 JNI_ENTRY(ResultType, \ 1714 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1715 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1716 \ 1717 EntryProbe;\ 1718 ResultType ret;\ 1719 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1720 (const ResultType&)ret);\ 1721 \ 1722 JavaValue jvalue(Tag); \ 1723 JNI_ArgumentPusherArray ap(methodID, args); \ 1724 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1725 ret = jvalue.get_##ResultType(); \ 1726 return ret;\ 1727 JNI_END 1728 1729 // the runtime type of subword integral basic types is integer 1730 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1731 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1732 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1733 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1734 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1735 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1736 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1737 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1738 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1739 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1740 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1741 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1742 1743 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1744 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1745 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1746 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1747 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1748 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1749 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1750 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1751 // Float and double probes don't return value because dtrace doesn't currently support it 1752 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1753 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1754 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1755 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1756 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1757 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1758 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1759 1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1764 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1765 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1766 1767 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1768 JNIWrapper("CallNonvirtualVoidMethod"); 1769 1770 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1771 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1772 1773 va_list args; 1774 va_start(args, methodID); 1775 JavaValue jvalue(T_VOID); 1776 JNI_ArgumentPusherVaArg ap(methodID, args); 1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1778 va_end(args); 1779 JNI_END 1780 1781 1782 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1783 JNIWrapper("CallNonvirtualVoidMethodV"); 1784 1785 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1786 env, obj, cls, (uintptr_t) methodID); 1787 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1788 1789 JavaValue jvalue(T_VOID); 1790 JNI_ArgumentPusherVaArg ap(methodID, args); 1791 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1792 JNI_END 1793 1794 1795 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1796 JNIWrapper("CallNonvirtualVoidMethodA"); 1797 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1798 env, obj, cls, (uintptr_t) methodID); 1799 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1800 JavaValue jvalue(T_VOID); 1801 JNI_ArgumentPusherArray ap(methodID, args); 1802 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1803 JNI_END 1804 1805 1806 1807 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1808 , EntryProbe, ResultProbe) \ 1809 \ 1810 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1811 , ResultProbe); \ 1812 \ 1813 JNI_ENTRY(ResultType, \ 1814 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1815 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1816 \ 1817 EntryProbe; \ 1818 ResultType ret = 0;\ 1819 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1820 (const ResultType&)ret);\ 1821 \ 1822 va_list args; \ 1823 va_start(args, methodID); \ 1824 JavaValue jvalue(Tag); \ 1825 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1826 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1827 va_end(args); \ 1828 ret = jvalue.get_##ResultType(); \ 1829 return ret;\ 1830 JNI_END 1831 1832 // the runtime type of subword integral basic types is integer 1833 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1834 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1835 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1836 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1837 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1838 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1839 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1840 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1841 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1842 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1843 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1844 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1845 1846 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1847 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1848 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1849 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1850 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1851 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1852 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1853 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1854 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1855 // Float and double probes don't return value because dtrace doesn't currently support it 1856 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1857 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1858 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1859 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1860 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1861 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1862 1863 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1864 , EntryProbe, ResultProbe) \ 1865 \ 1866 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1867 , ResultProbe); \ 1868 \ 1869 JNI_ENTRY(ResultType, \ 1870 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1871 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1872 \ 1873 EntryProbe; \ 1874 ResultType ret = 0;\ 1875 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1876 (const ResultType&)ret);\ 1877 \ 1878 JavaValue jvalue(Tag); \ 1879 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1880 /* Make sure class is initialized before trying to invoke its method */ \ 1881 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1882 k->initialize(CHECK_0); \ 1883 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1884 va_end(args); \ 1885 ret = jvalue.get_##ResultType(); \ 1886 return ret;\ 1887 JNI_END 1888 1889 // the runtime type of subword integral basic types is integer 1890 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1891 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1892 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1893 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1894 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1895 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1896 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1897 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1898 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1899 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1900 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1901 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1902 1903 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1904 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1905 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1906 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1907 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1908 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1909 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1910 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1911 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1912 // Float and double probes don't return value because dtrace doesn't currently support it 1913 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1914 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1915 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1916 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1917 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1918 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1919 1920 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1921 , EntryProbe, ResultProbe) \ 1922 \ 1923 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1924 , ResultProbe); \ 1925 \ 1926 JNI_ENTRY(ResultType, \ 1927 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1928 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1929 \ 1930 EntryProbe; \ 1931 ResultType ret = 0;\ 1932 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1933 (const ResultType&)ret);\ 1934 \ 1935 JavaValue jvalue(Tag); \ 1936 JNI_ArgumentPusherArray ap(methodID, args); \ 1937 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1938 ret = jvalue.get_##ResultType(); \ 1939 return ret;\ 1940 JNI_END 1941 1942 // the runtime type of subword integral basic types is integer 1943 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1944 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1945 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1946 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1947 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1948 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1949 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1950 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1951 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1952 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1953 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1954 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1955 1956 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1957 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1958 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1959 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1960 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1961 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1962 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1963 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1964 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1965 // Float and double probes don't return value because dtrace doesn't currently support it 1966 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1967 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1968 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1969 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1970 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1971 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1972 1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1977 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1978 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1979 1980 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1981 JNIWrapper("CallStaticVoidMethod"); 1982 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1983 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1984 1985 va_list args; 1986 va_start(args, methodID); 1987 JavaValue jvalue(T_VOID); 1988 JNI_ArgumentPusherVaArg ap(methodID, args); 1989 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1990 va_end(args); 1991 JNI_END 1992 1993 1994 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1995 JNIWrapper("CallStaticVoidMethodV"); 1996 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1997 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1998 1999 JavaValue jvalue(T_VOID); 2000 JNI_ArgumentPusherVaArg ap(methodID, args); 2001 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2002 JNI_END 2003 2004 2005 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2006 JNIWrapper("CallStaticVoidMethodA"); 2007 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2008 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2009 2010 JavaValue jvalue(T_VOID); 2011 JNI_ArgumentPusherArray ap(methodID, args); 2012 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2013 JNI_END 2014 2015 2016 // 2017 // Accessing Fields 2018 // 2019 2020 2021 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2022 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2023 2024 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2025 const char *name, const char *sig)) 2026 JNIWrapper("GetFieldID"); 2027 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2028 jfieldID ret = 0; 2029 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2030 2031 // The class should have been loaded (we have an instance of the class 2032 // passed in) so the field and signature should already be in the symbol 2033 // table. If they're not there, the field doesn't exist. 2034 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2035 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2036 if (fieldname == NULL || signame == NULL) { 2037 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2038 } 2039 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2040 // Make sure class is initialized before handing id's out to fields 2041 k->initialize(CHECK_NULL); 2042 2043 fieldDescriptor fd; 2044 if (!k->is_instance_klass() || 2045 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2046 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2047 } 2048 2049 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2050 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2051 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2052 return ret; 2053 JNI_END 2054 2055 2056 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2057 JNIWrapper("GetObjectField"); 2058 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2059 oop o = JNIHandles::resolve_non_null(obj); 2060 Klass* k = o->klass(); 2061 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2062 // Keep JVMTI addition small and only check enabled flag here. 2063 // jni_GetField_probe() assumes that is okay to create handles. 2064 if (JvmtiExport::should_post_field_access()) { 2065 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2066 } 2067 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 2068 jobject ret = JNIHandles::make_local(env, loaded_obj); 2069 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2070 return ret; 2071 JNI_END 2072 2073 2074 2075 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2076 , EntryProbe, ReturnProbe) \ 2077 \ 2078 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2079 , ReturnProbe); \ 2080 \ 2081 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2082 JNIWrapper("Get" XSTR(Result) "Field"); \ 2083 \ 2084 EntryProbe; \ 2085 Return ret = 0;\ 2086 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2087 \ 2088 oop o = JNIHandles::resolve_non_null(obj); \ 2089 Klass* k = o->klass(); \ 2090 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2091 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2092 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2093 /* and creates a ResetNoHandleMark. */ \ 2094 if (JvmtiExport::should_post_field_access()) { \ 2095 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2096 } \ 2097 ret = o->Fieldname##_field(offset); \ 2098 return ret; \ 2099 JNI_END 2100 2101 DEFINE_GETFIELD(jboolean, bool, Boolean 2102 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2103 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2104 DEFINE_GETFIELD(jbyte, byte, Byte 2105 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2106 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2107 DEFINE_GETFIELD(jchar, char, Char 2108 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2109 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2110 DEFINE_GETFIELD(jshort, short, Short 2111 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2112 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2113 DEFINE_GETFIELD(jint, int, Int 2114 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2115 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2116 DEFINE_GETFIELD(jlong, long, Long 2117 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2118 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2119 // Float and double probes don't return value because dtrace doesn't currently support it 2120 DEFINE_GETFIELD(jfloat, float, Float 2121 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2122 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2123 DEFINE_GETFIELD(jdouble, double, Double 2124 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2125 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2126 2127 address jni_GetBooleanField_addr() { 2128 return (address)jni_GetBooleanField; 2129 } 2130 address jni_GetByteField_addr() { 2131 return (address)jni_GetByteField; 2132 } 2133 address jni_GetCharField_addr() { 2134 return (address)jni_GetCharField; 2135 } 2136 address jni_GetShortField_addr() { 2137 return (address)jni_GetShortField; 2138 } 2139 address jni_GetIntField_addr() { 2140 return (address)jni_GetIntField; 2141 } 2142 address jni_GetLongField_addr() { 2143 return (address)jni_GetLongField; 2144 } 2145 address jni_GetFloatField_addr() { 2146 return (address)jni_GetFloatField; 2147 } 2148 address jni_GetDoubleField_addr() { 2149 return (address)jni_GetDoubleField; 2150 } 2151 2152 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2153 JNIWrapper("SetObjectField"); 2154 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2155 oop o = JNIHandles::resolve_non_null(obj); 2156 Klass* k = o->klass(); 2157 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2158 // Keep JVMTI addition small and only check enabled flag here. 2159 // jni_SetField_probe_nh() assumes that is not okay to create handles 2160 // and creates a ResetNoHandleMark. 2161 if (JvmtiExport::should_post_field_modification()) { 2162 jvalue field_value; 2163 field_value.l = value; 2164 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2165 } 2166 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2167 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2168 JNI_END 2169 2170 2171 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2172 , EntryProbe, ReturnProbe) \ 2173 \ 2174 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2175 JNIWrapper("Set" XSTR(Result) "Field"); \ 2176 \ 2177 EntryProbe; \ 2178 \ 2179 oop o = JNIHandles::resolve_non_null(obj); \ 2180 Klass* k = o->klass(); \ 2181 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2182 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2183 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2184 /* and creates a ResetNoHandleMark. */ \ 2185 if (JvmtiExport::should_post_field_modification()) { \ 2186 jvalue field_value; \ 2187 field_value.unionType = value; \ 2188 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2189 } \ 2190 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2191 o->Fieldname##_field_put(offset, value); \ 2192 ReturnProbe; \ 2193 JNI_END 2194 2195 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2196 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2197 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2198 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2199 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2200 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2201 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2202 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2203 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2204 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2205 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2206 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2207 DEFINE_SETFIELD(jint, int, Int, 'I', i 2208 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2209 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2210 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2211 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2212 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2213 // Float and double probes don't return value because dtrace doesn't currently support it 2214 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2215 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2216 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2217 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2218 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2219 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2220 2221 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2222 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2223 2224 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2225 JNIWrapper("ToReflectedField"); 2226 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2227 jobject ret = NULL; 2228 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2229 2230 fieldDescriptor fd; 2231 bool found = false; 2232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2233 2234 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2235 2236 if (isStatic) { 2237 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2238 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2239 assert(id->is_static_field_id(), "invalid static field id"); 2240 found = id->find_local_field(&fd); 2241 } else { 2242 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2243 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2244 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2245 } 2246 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2247 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2248 ret = JNIHandles::make_local(env, reflected); 2249 return ret; 2250 JNI_END 2251 2252 2253 // 2254 // Accessing Static Fields 2255 // 2256 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2257 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2258 2259 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2260 const char *name, const char *sig)) 2261 JNIWrapper("GetStaticFieldID"); 2262 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2263 jfieldID ret = NULL; 2264 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2265 2266 // The class should have been loaded (we have an instance of the class 2267 // passed in) so the field and signature should already be in the symbol 2268 // table. If they're not there, the field doesn't exist. 2269 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2270 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2271 if (fieldname == NULL || signame == NULL) { 2272 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2273 } 2274 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2275 // Make sure class is initialized before handing id's out to static fields 2276 k->initialize(CHECK_NULL); 2277 2278 fieldDescriptor fd; 2279 if (!k->is_instance_klass() || 2280 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2281 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2282 } 2283 2284 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2285 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2286 debug_only(id->set_is_static_field_id();) 2287 2288 debug_only(id->verify(fd.field_holder())); 2289 2290 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2291 return ret; 2292 JNI_END 2293 2294 2295 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2296 JNIWrapper("GetStaticObjectField"); 2297 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2298 #if INCLUDE_JNI_CHECK 2299 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2300 #endif // INCLUDE_JNI_CHECK 2301 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2302 assert(id->is_static_field_id(), "invalid static field id"); 2303 // Keep JVMTI addition small and only check enabled flag here. 2304 // jni_GetField_probe() assumes that is okay to create handles. 2305 if (JvmtiExport::should_post_field_access()) { 2306 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2307 } 2308 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2309 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2310 return ret; 2311 JNI_END 2312 2313 2314 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2315 , EntryProbe, ReturnProbe) \ 2316 \ 2317 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2318 , ReturnProbe); \ 2319 \ 2320 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2321 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2322 EntryProbe; \ 2323 Return ret = 0;\ 2324 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2325 (const Return&)ret);\ 2326 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2327 assert(id->is_static_field_id(), "invalid static field id"); \ 2328 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2329 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2330 if (JvmtiExport::should_post_field_access()) { \ 2331 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2332 } \ 2333 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2334 return ret;\ 2335 JNI_END 2336 2337 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2338 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2339 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2340 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2341 DEFINE_GETSTATICFIELD(jchar, char, Char 2342 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2343 DEFINE_GETSTATICFIELD(jshort, short, Short 2344 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2345 DEFINE_GETSTATICFIELD(jint, int, Int 2346 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2347 DEFINE_GETSTATICFIELD(jlong, long, Long 2348 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2349 // Float and double probes don't return value because dtrace doesn't currently support it 2350 DEFINE_GETSTATICFIELD(jfloat, float, Float 2351 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2352 DEFINE_GETSTATICFIELD(jdouble, double, Double 2353 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2354 2355 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2356 JNIWrapper("SetStaticObjectField"); 2357 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2358 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2359 assert(id->is_static_field_id(), "invalid static field id"); 2360 // Keep JVMTI addition small and only check enabled flag here. 2361 // jni_SetField_probe() assumes that is okay to create handles. 2362 if (JvmtiExport::should_post_field_modification()) { 2363 jvalue field_value; 2364 field_value.l = value; 2365 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2366 } 2367 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2368 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2369 JNI_END 2370 2371 2372 2373 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2374 , EntryProbe, ReturnProbe) \ 2375 \ 2376 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2377 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2378 EntryProbe; \ 2379 \ 2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2381 assert(id->is_static_field_id(), "invalid static field id"); \ 2382 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2383 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2384 if (JvmtiExport::should_post_field_modification()) { \ 2385 jvalue field_value; \ 2386 field_value.unionType = value; \ 2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2388 } \ 2389 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2390 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2391 ReturnProbe;\ 2392 JNI_END 2393 2394 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2395 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2396 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2397 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2398 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2399 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2400 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2401 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2402 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2403 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2404 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2405 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2406 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2407 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2408 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2409 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2410 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2411 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2412 // Float and double probes don't return value because dtrace doesn't currently support it 2413 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2414 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2415 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2416 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2417 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2418 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2419 2420 // 2421 // String Operations 2422 // 2423 2424 // Unicode Interface 2425 2426 DT_RETURN_MARK_DECL(NewString, jstring 2427 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2428 2429 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2430 JNIWrapper("NewString"); 2431 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2432 jstring ret = NULL; 2433 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2434 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2435 ret = (jstring) JNIHandles::make_local(env, string); 2436 return ret; 2437 JNI_END 2438 2439 2440 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2441 JNIWrapper("GetStringLength"); 2442 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2443 jsize ret = 0; 2444 oop s = JNIHandles::resolve_non_null(string); 2445 if (java_lang_String::value(s) != NULL) { 2446 ret = java_lang_String::length(s); 2447 } 2448 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2449 return ret; 2450 JNI_END 2451 2452 2453 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2454 JNIEnv *env, jstring string, jboolean *isCopy)) 2455 JNIWrapper("GetStringChars"); 2456 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2457 jchar* buf = NULL; 2458 oop s = JNIHandles::resolve_non_null(string); 2459 typeArrayOop s_value = java_lang_String::value(s); 2460 if (s_value != NULL) { 2461 int s_len = java_lang_String::length(s); 2462 bool is_latin1 = java_lang_String::is_latin1(s); 2463 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2464 /* JNI Specification states return NULL on OOM */ 2465 if (buf != NULL) { 2466 if (s_len > 0) { 2467 if (!is_latin1) { 2468 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2469 buf, s_len); 2470 } else { 2471 for (int i = 0; i < s_len; i++) { 2472 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2473 } 2474 } 2475 } 2476 buf[s_len] = 0; 2477 //%note jni_5 2478 if (isCopy != NULL) { 2479 *isCopy = JNI_TRUE; 2480 } 2481 } 2482 } 2483 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2484 return buf; 2485 JNI_END 2486 2487 2488 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2489 JNIWrapper("ReleaseStringChars"); 2490 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2491 //%note jni_6 2492 if (chars != NULL) { 2493 // Since String objects are supposed to be immutable, don't copy any 2494 // new data back. A bad user will have to go after the char array. 2495 FreeHeap((void*) chars); 2496 } 2497 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2498 JNI_END 2499 2500 2501 // UTF Interface 2502 2503 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2504 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2505 2506 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2507 JNIWrapper("NewStringUTF"); 2508 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2509 jstring ret; 2510 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2511 2512 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2513 ret = (jstring) JNIHandles::make_local(env, result); 2514 return ret; 2515 JNI_END 2516 2517 2518 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2519 JNIWrapper("GetStringUTFLength"); 2520 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2521 jsize ret = 0; 2522 oop java_string = JNIHandles::resolve_non_null(string); 2523 if (java_lang_String::value(java_string) != NULL) { 2524 ret = java_lang_String::utf8_length(java_string); 2525 } 2526 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2527 return ret; 2528 JNI_END 2529 2530 2531 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2532 JNIWrapper("GetStringUTFChars"); 2533 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2534 char* result = NULL; 2535 oop java_string = JNIHandles::resolve_non_null(string); 2536 if (java_lang_String::value(java_string) != NULL) { 2537 size_t length = java_lang_String::utf8_length(java_string); 2538 /* JNI Specification states return NULL on OOM */ 2539 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2540 if (result != NULL) { 2541 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2542 if (isCopy != NULL) { 2543 *isCopy = JNI_TRUE; 2544 } 2545 } 2546 } 2547 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2548 return result; 2549 JNI_END 2550 2551 2552 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2553 JNIWrapper("ReleaseStringUTFChars"); 2554 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2555 if (chars != NULL) { 2556 FreeHeap((char*) chars); 2557 } 2558 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2559 JNI_END 2560 2561 2562 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2563 JNIWrapper("GetArrayLength"); 2564 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2565 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2566 assert(a->is_array(), "must be array"); 2567 jsize ret = a->length(); 2568 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2569 return ret; 2570 JNI_END 2571 2572 2573 // 2574 // Object Array Operations 2575 // 2576 2577 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2578 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2579 2580 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2581 JNIWrapper("NewObjectArray"); 2582 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2583 jobjectArray ret = NULL; 2584 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2585 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2586 Klass* ak = ek->array_klass(CHECK_NULL); 2587 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2588 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2589 oop initial_value = JNIHandles::resolve(initialElement); 2590 if (initial_value != NULL) { // array already initialized with NULL 2591 for (int index = 0; index < length; index++) { 2592 result->obj_at_put(index, initial_value); 2593 } 2594 } 2595 ret = (jobjectArray) JNIHandles::make_local(env, result); 2596 return ret; 2597 JNI_END 2598 2599 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2600 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2601 2602 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2603 JNIWrapper("GetObjectArrayElement"); 2604 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2605 jobject ret = NULL; 2606 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2607 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2608 if (a->is_within_bounds(index)) { 2609 ret = JNIHandles::make_local(env, a->obj_at(index)); 2610 return ret; 2611 } else { 2612 char buf[jintAsStringSize]; 2613 sprintf(buf, "%d", index); 2614 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2615 } 2616 JNI_END 2617 2618 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2619 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2620 2621 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2622 JNIWrapper("SetObjectArrayElement"); 2623 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2624 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2625 2626 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2627 oop v = JNIHandles::resolve(value); 2628 if (a->is_within_bounds(index)) { 2629 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2630 a->obj_at_put(index, v); 2631 } else { 2632 ResourceMark rm(THREAD); 2633 stringStream ss; 2634 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2635 ss.print("type mismatch: can not store %s to %s[%d]", 2636 v->klass()->external_name(), 2637 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2638 index); 2639 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2640 ss.print("[]"); 2641 } 2642 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2643 } 2644 } else { 2645 char buf[jintAsStringSize]; 2646 sprintf(buf, "%d", index); 2647 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2648 } 2649 JNI_END 2650 2651 2652 2653 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2654 ,EntryProbe,ReturnProbe) \ 2655 \ 2656 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2657 , ReturnProbe); \ 2658 \ 2659 JNI_ENTRY(Return, \ 2660 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2661 JNIWrapper("New" XSTR(Result) "Array"); \ 2662 EntryProbe; \ 2663 Return ret = NULL;\ 2664 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2665 \ 2666 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2667 ret = (Return) JNIHandles::make_local(env, obj); \ 2668 return ret;\ 2669 JNI_END 2670 2671 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2672 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2673 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2674 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2675 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2676 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2677 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2678 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2679 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2680 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2681 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2682 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2683 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2684 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2685 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2686 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2687 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2688 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2689 DEFINE_NEWSCALARARRAY(jfloatArray, new_floatArray, Float, 2690 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2691 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2692 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2693 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2694 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2695 2696 // Return an address which will fault if the caller writes to it. 2697 2698 static char* get_bad_address() { 2699 static char* bad_address = NULL; 2700 if (bad_address == NULL) { 2701 size_t size = os::vm_allocation_granularity(); 2702 bad_address = os::reserve_memory(size); 2703 if (bad_address != NULL) { 2704 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2705 /*is_committed*/false); 2706 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2707 } 2708 } 2709 return bad_address; 2710 } 2711 2712 2713 2714 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2715 , EntryProbe, ReturnProbe) \ 2716 \ 2717 JNI_QUICK_ENTRY(ElementType*, \ 2718 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2719 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2720 EntryProbe; \ 2721 /* allocate an chunk of memory in c land */ \ 2722 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2723 ElementType* result; \ 2724 int len = a->length(); \ 2725 if (len == 0) { \ 2726 /* Empty array: legal but useless, can't return NULL. \ 2727 * Return a pointer to something useless. \ 2728 * Avoid asserts in typeArrayOop. */ \ 2729 result = (ElementType*)get_bad_address(); \ 2730 } else { \ 2731 /* JNI Specification states return NULL on OOM */ \ 2732 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2733 if (result != NULL) { \ 2734 /* copy the array to the c chunk */ \ 2735 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2736 result, len); \ 2737 if (isCopy) { \ 2738 *isCopy = JNI_TRUE; \ 2739 } \ 2740 } \ 2741 } \ 2742 ReturnProbe; \ 2743 return result; \ 2744 JNI_END 2745 2746 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2747 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2748 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2749 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2750 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2751 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2752 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2753 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2754 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2755 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2756 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2757 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2758 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2759 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2760 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2761 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2762 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2763 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2764 // Float and double probes don't return value because dtrace doesn't currently support it 2765 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2766 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2767 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2768 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2769 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2770 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2771 2772 2773 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2774 , EntryProbe, ReturnProbe);\ 2775 \ 2776 JNI_QUICK_ENTRY(void, \ 2777 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2778 ElementType *buf, jint mode)) \ 2779 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2780 EntryProbe; \ 2781 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2782 int len = a->length(); \ 2783 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2784 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2785 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2786 } \ 2787 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2788 FreeHeap(buf); \ 2789 } \ 2790 } \ 2791 ReturnProbe; \ 2792 JNI_END 2793 2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2795 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2796 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2798 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2799 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2801 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2802 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2804 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2805 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2807 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2808 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2810 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2811 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2813 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2814 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2816 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2817 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2818 2819 2820 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2821 , EntryProbe, ReturnProbe); \ 2822 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2823 , ReturnProbe); \ 2824 \ 2825 JNI_ENTRY(void, \ 2826 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2827 jsize len, ElementType *buf)) \ 2828 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2829 EntryProbe; \ 2830 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2831 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2832 if (start < 0 || len < 0 || (start > src->length() - len)) { \ 2833 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2834 } else { \ 2835 if (len > 0) { \ 2836 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2837 } \ 2838 } \ 2839 JNI_END 2840 2841 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2842 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2843 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2844 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2845 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2846 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2847 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2848 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2849 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2850 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2851 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2852 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2853 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2854 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2855 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2856 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2857 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2858 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2859 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2860 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2861 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2862 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2863 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2864 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2865 2866 2867 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2868 , EntryProbe, ReturnProbe); \ 2869 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2870 ,ReturnProbe); \ 2871 \ 2872 JNI_ENTRY(void, \ 2873 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2874 jsize len, const ElementType *buf)) \ 2875 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2876 EntryProbe; \ 2877 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2878 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2879 if (start < 0 || len < 0 || (start > dst->length() - len)) { \ 2880 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2881 } else { \ 2882 if (len > 0) { \ 2883 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2884 } \ 2885 } \ 2886 JNI_END 2887 2888 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2889 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2890 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2891 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2892 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2893 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2894 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2895 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2896 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2897 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2898 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2899 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2900 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2901 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2902 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2903 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2904 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2905 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2906 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2907 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2908 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2909 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2910 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2911 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2912 2913 2914 // 2915 // Interception of natives 2916 // 2917 2918 // The RegisterNatives call being attempted tried to register with a method that 2919 // is not native. Ask JVM TI what prefixes have been specified. Then check 2920 // to see if the native method is now wrapped with the prefixes. See the 2921 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2922 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2923 #if INCLUDE_JVMTI 2924 ResourceMark rm(THREAD); 2925 Method* method; 2926 int name_len = name->utf8_length(); 2927 char* name_str = name->as_utf8(); 2928 int prefix_count; 2929 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2930 for (int i = 0; i < prefix_count; i++) { 2931 char* prefix = prefixes[i]; 2932 int prefix_len = (int)strlen(prefix); 2933 2934 // try adding this prefix to the method name and see if it matches another method name 2935 int trial_len = name_len + prefix_len; 2936 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2937 strcpy(trial_name_str, prefix); 2938 strcat(trial_name_str, name_str); 2939 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2940 if (trial_name == NULL) { 2941 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2942 } 2943 method = k->lookup_method(trial_name, signature); 2944 if (method == NULL) { 2945 continue; // signature doesn't match, try the next prefix 2946 } 2947 if (method->is_native()) { 2948 method->set_is_prefixed_native(); 2949 return method; // wahoo, we found a prefixed version of the method, return it 2950 } 2951 // found as non-native, so prefix is good, add it, probably just need more prefixes 2952 name_len = trial_len; 2953 name_str = trial_name_str; 2954 } 2955 #endif // INCLUDE_JVMTI 2956 return NULL; // not found 2957 } 2958 2959 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2960 Method* method = k->lookup_method(name, signature); 2961 if (method == NULL) { 2962 ResourceMark rm; 2963 stringStream st; 2964 st.print("Method %s name or signature does not match", 2965 Method::name_and_sig_as_C_string(k, name, signature)); 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 %s is not declared as native", 2975 Method::name_and_sig_as_C_string(k, name, signature)); 2976 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2977 } 2978 } 2979 2980 if (entry != NULL) { 2981 method->set_native_function(entry, 2982 Method::native_bind_event_is_interesting); 2983 } else { 2984 method->clear_native_function(); 2985 } 2986 if (PrintJNIResolving) { 2987 ResourceMark rm(THREAD); 2988 tty->print_cr("[Registering JNI native method %s.%s]", 2989 method->method_holder()->external_name(), 2990 method->name()->as_C_string()); 2991 } 2992 return true; 2993 } 2994 2995 DT_RETURN_MARK_DECL(RegisterNatives, jint 2996 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2997 2998 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2999 const JNINativeMethod *methods, 3000 jint nMethods)) 3001 JNIWrapper("RegisterNatives"); 3002 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3003 jint ret = 0; 3004 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3005 3006 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3007 3008 for (int index = 0; index < nMethods; index++) { 3009 const char* meth_name = methods[index].name; 3010 const char* meth_sig = methods[index].signature; 3011 int meth_name_len = (int)strlen(meth_name); 3012 3013 // The class should have been loaded (we have an instance of the class 3014 // passed in) so the method and signature should already be in the symbol 3015 // table. If they're not there, the method doesn't exist. 3016 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3017 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3018 3019 if (name == NULL || signature == NULL) { 3020 ResourceMark rm; 3021 stringStream st; 3022 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3023 // Must return negative value on failure 3024 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3025 } 3026 3027 bool res = register_native(k, name, signature, 3028 (address) methods[index].fnPtr, THREAD); 3029 if (!res) { 3030 ret = -1; 3031 break; 3032 } 3033 } 3034 return ret; 3035 JNI_END 3036 3037 3038 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3039 JNIWrapper("UnregisterNatives"); 3040 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3041 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3042 //%note jni_2 3043 if (k->is_instance_klass()) { 3044 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3045 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3046 if (m->is_native()) { 3047 m->clear_native_function(); 3048 m->set_signature_handler(NULL); 3049 } 3050 } 3051 } 3052 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3053 return 0; 3054 JNI_END 3055 3056 // 3057 // Monitor functions 3058 // 3059 3060 DT_RETURN_MARK_DECL(MonitorEnter, jint 3061 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3062 3063 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3064 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3065 jint ret = JNI_ERR; 3066 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3067 3068 // If the object is null, we can't do anything with it 3069 if (jobj == NULL) { 3070 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3071 } 3072 3073 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3074 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3075 ret = JNI_OK; 3076 return ret; 3077 JNI_END 3078 3079 DT_RETURN_MARK_DECL(MonitorExit, jint 3080 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3081 3082 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3083 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3084 jint ret = JNI_ERR; 3085 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3086 3087 // Don't do anything with a null object 3088 if (jobj == NULL) { 3089 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3090 } 3091 3092 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3093 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3094 3095 ret = JNI_OK; 3096 return ret; 3097 JNI_END 3098 3099 // 3100 // Extensions 3101 // 3102 3103 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3104 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3105 3106 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3107 JNIWrapper("GetStringRegion"); 3108 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3109 DT_VOID_RETURN_MARK(GetStringRegion); 3110 oop s = JNIHandles::resolve_non_null(string); 3111 int s_len = java_lang_String::length(s); 3112 if (start < 0 || len < 0 || start > s_len - len) { 3113 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3114 } else { 3115 if (len > 0) { 3116 typeArrayOop s_value = java_lang_String::value(s); 3117 bool is_latin1 = java_lang_String::is_latin1(s); 3118 if (!is_latin1) { 3119 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 3120 buf, len); 3121 } else { 3122 for (int i = 0; i < len; i++) { 3123 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3124 } 3125 } 3126 } 3127 } 3128 JNI_END 3129 3130 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3131 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3132 3133 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3134 JNIWrapper("GetStringUTFRegion"); 3135 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3136 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3137 oop s = JNIHandles::resolve_non_null(string); 3138 int s_len = java_lang_String::length(s); 3139 if (start < 0 || len < 0 || start > s_len - len) { 3140 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3141 } else { 3142 //%note jni_7 3143 if (len > 0) { 3144 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3145 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3146 // as_utf8_string null-terminates the result string 3147 } else { 3148 // JDK null-terminates the buffer even in len is zero 3149 if (buf != NULL) { 3150 buf[0] = 0; 3151 } 3152 } 3153 } 3154 JNI_END 3155 3156 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 3157 if (Universe::heap()->supports_object_pinning()) { 3158 const oop o = JNIHandles::resolve_non_null(obj); 3159 return Universe::heap()->pin_object(thread, o); 3160 } else { 3161 GCLocker::lock_critical(thread); 3162 return JNIHandles::resolve_non_null(obj); 3163 } 3164 } 3165 3166 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 3167 if (Universe::heap()->supports_object_pinning()) { 3168 const oop o = JNIHandles::resolve_non_null(obj); 3169 return Universe::heap()->unpin_object(thread, o); 3170 } else { 3171 GCLocker::unlock_critical(thread); 3172 } 3173 } 3174 3175 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3176 JNIWrapper("GetPrimitiveArrayCritical"); 3177 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3178 if (isCopy != NULL) { 3179 *isCopy = JNI_FALSE; 3180 } 3181 oop a = lock_gc_or_pin_object(thread, array); 3182 assert(a->is_array(), "just checking"); 3183 BasicType type; 3184 if (a->is_objArray()) { 3185 type = T_OBJECT; 3186 } else { 3187 type = TypeArrayKlass::cast(a->klass())->element_type(); 3188 } 3189 void* ret = arrayOop(a)->base(type); 3190 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3191 return ret; 3192 JNI_END 3193 3194 3195 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3196 JNIWrapper("ReleasePrimitiveArrayCritical"); 3197 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3198 unlock_gc_or_unpin_object(thread, array); 3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3200 JNI_END 3201 3202 3203 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3204 JNIWrapper("GetStringCritical"); 3205 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3206 oop s = lock_gc_or_pin_object(thread, string); 3207 typeArrayOop s_value = java_lang_String::value(s); 3208 bool is_latin1 = java_lang_String::is_latin1(s); 3209 if (isCopy != NULL) { 3210 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3211 } 3212 jchar* ret; 3213 if (!is_latin1) { 3214 ret = (jchar*) s_value->base(T_CHAR); 3215 } else { 3216 // Inflate latin1 encoded string to UTF16 3217 int s_len = java_lang_String::length(s); 3218 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3219 /* JNI Specification states return NULL on OOM */ 3220 if (ret != NULL) { 3221 for (int i = 0; i < s_len; i++) { 3222 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3223 } 3224 ret[s_len] = 0; 3225 } 3226 } 3227 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3228 return ret; 3229 JNI_END 3230 3231 3232 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3233 JNIWrapper("ReleaseStringCritical"); 3234 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3235 // The str and chars arguments are ignored for UTF16 strings 3236 oop s = JNIHandles::resolve_non_null(str); 3237 bool is_latin1 = java_lang_String::is_latin1(s); 3238 if (is_latin1) { 3239 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3240 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3241 FREE_C_HEAP_ARRAY(jchar, chars); 3242 } 3243 unlock_gc_or_unpin_object(thread, str); 3244 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3245 JNI_END 3246 3247 3248 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3249 JNIWrapper("jni_NewWeakGlobalRef"); 3250 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3251 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3252 jweak ret = JNIHandles::make_weak_global(ref_handle); 3253 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3254 return ret; 3255 JNI_END 3256 3257 // Must be JNI_ENTRY (with HandleMark) 3258 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3259 JNIWrapper("jni_DeleteWeakGlobalRef"); 3260 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3261 JNIHandles::destroy_weak_global(ref); 3262 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3263 JNI_END 3264 3265 3266 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3267 JNIWrapper("jni_ExceptionCheck"); 3268 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3269 jni_check_async_exceptions(thread); 3270 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3271 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3272 return ret; 3273 JNI_END 3274 3275 3276 // Initialization state for three routines below relating to 3277 // java.nio.DirectBuffers 3278 static int directBufferSupportInitializeStarted = 0; 3279 static volatile int directBufferSupportInitializeEnded = 0; 3280 static volatile int directBufferSupportInitializeFailed = 0; 3281 static jclass bufferClass = NULL; 3282 static jclass directBufferClass = NULL; 3283 static jclass directByteBufferClass = NULL; 3284 static jmethodID directByteBufferConstructor = NULL; 3285 static jfieldID directBufferAddressField = NULL; 3286 static jfieldID bufferCapacityField = NULL; 3287 3288 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3289 Handle loader; // null (bootstrap) loader 3290 Handle protection_domain; // null protection domain 3291 3292 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3293 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3294 3295 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3296 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3297 } 3298 return result; 3299 } 3300 3301 // These lookups are done with the NULL (bootstrap) ClassLoader to 3302 // circumvent any security checks that would be done by jni_FindClass. 3303 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3304 { 3305 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3306 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3307 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3308 return true; 3309 } 3310 JNI_END 3311 3312 3313 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3314 if (directBufferSupportInitializeFailed) { 3315 return false; 3316 } 3317 3318 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3319 if (!lookupDirectBufferClasses(env)) { 3320 directBufferSupportInitializeFailed = 1; 3321 return false; 3322 } 3323 3324 // Make global references for these 3325 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3326 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3327 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3328 3329 // Get needed field and method IDs 3330 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3331 if (env->ExceptionCheck()) { 3332 env->ExceptionClear(); 3333 directBufferSupportInitializeFailed = 1; 3334 return false; 3335 } 3336 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3337 if (env->ExceptionCheck()) { 3338 env->ExceptionClear(); 3339 directBufferSupportInitializeFailed = 1; 3340 return false; 3341 } 3342 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3343 if (env->ExceptionCheck()) { 3344 env->ExceptionClear(); 3345 directBufferSupportInitializeFailed = 1; 3346 return false; 3347 } 3348 3349 if ((directByteBufferConstructor == NULL) || 3350 (directBufferAddressField == NULL) || 3351 (bufferCapacityField == NULL)) { 3352 directBufferSupportInitializeFailed = 1; 3353 return false; 3354 } 3355 3356 directBufferSupportInitializeEnded = 1; 3357 } else { 3358 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3359 os::naked_yield(); 3360 } 3361 } 3362 3363 return !directBufferSupportInitializeFailed; 3364 } 3365 3366 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3367 { 3368 // thread_from_jni_environment() will block if VM is gone. 3369 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3370 3371 JNIWrapper("jni_NewDirectByteBuffer"); 3372 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3373 3374 if (!directBufferSupportInitializeEnded) { 3375 if (!initializeDirectBufferSupport(env, thread)) { 3376 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3377 return NULL; 3378 } 3379 } 3380 3381 // Being paranoid about accidental sign extension on address 3382 jlong addr = (jlong) ((uintptr_t) address); 3383 // NOTE that package-private DirectByteBuffer constructor currently 3384 // takes int capacity 3385 jint cap = (jint) capacity; 3386 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3387 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3388 return ret; 3389 } 3390 3391 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3392 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3393 3394 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3395 { 3396 // thread_from_jni_environment() will block if VM is gone. 3397 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3398 3399 JNIWrapper("jni_GetDirectBufferAddress"); 3400 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3401 void* ret = NULL; 3402 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3403 3404 if (!directBufferSupportInitializeEnded) { 3405 if (!initializeDirectBufferSupport(env, thread)) { 3406 return 0; 3407 } 3408 } 3409 3410 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3411 return 0; 3412 } 3413 3414 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3415 return ret; 3416 } 3417 3418 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3419 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3420 3421 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3422 { 3423 // thread_from_jni_environment() will block if VM is gone. 3424 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3425 3426 JNIWrapper("jni_GetDirectBufferCapacity"); 3427 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3428 jlong ret = -1; 3429 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3430 3431 if (!directBufferSupportInitializeEnded) { 3432 if (!initializeDirectBufferSupport(env, thread)) { 3433 ret = 0; 3434 return ret; 3435 } 3436 } 3437 3438 if (buf == NULL) { 3439 return -1; 3440 } 3441 3442 if (!env->IsInstanceOf(buf, directBufferClass)) { 3443 return -1; 3444 } 3445 3446 // NOTE that capacity is currently an int in the implementation 3447 ret = env->GetIntField(buf, bufferCapacityField); 3448 return ret; 3449 } 3450 3451 3452 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3453 JNIWrapper("GetVersion"); 3454 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3455 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3456 return CurrentVersion; 3457 JNI_END 3458 3459 extern struct JavaVM_ main_vm; 3460 3461 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3462 JNIWrapper("jni_GetJavaVM"); 3463 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3464 *vm = (JavaVM *)(&main_vm); 3465 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3466 return JNI_OK; 3467 JNI_END 3468 3469 3470 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3471 JNIWrapper("GetModule"); 3472 return Modules::get_module(clazz, THREAD); 3473 JNI_END 3474 3475 3476 // Structure containing all jni functions 3477 struct JNINativeInterface_ jni_NativeInterface = { 3478 NULL, 3479 NULL, 3480 NULL, 3481 3482 NULL, 3483 3484 jni_GetVersion, 3485 3486 jni_DefineClass, 3487 jni_FindClass, 3488 3489 jni_FromReflectedMethod, 3490 jni_FromReflectedField, 3491 3492 jni_ToReflectedMethod, 3493 3494 jni_GetSuperclass, 3495 jni_IsAssignableFrom, 3496 3497 jni_ToReflectedField, 3498 3499 jni_Throw, 3500 jni_ThrowNew, 3501 jni_ExceptionOccurred, 3502 jni_ExceptionDescribe, 3503 jni_ExceptionClear, 3504 jni_FatalError, 3505 3506 jni_PushLocalFrame, 3507 jni_PopLocalFrame, 3508 3509 jni_NewGlobalRef, 3510 jni_DeleteGlobalRef, 3511 jni_DeleteLocalRef, 3512 jni_IsSameObject, 3513 3514 jni_NewLocalRef, 3515 jni_EnsureLocalCapacity, 3516 3517 jni_AllocObject, 3518 jni_NewObject, 3519 jni_NewObjectV, 3520 jni_NewObjectA, 3521 3522 jni_GetObjectClass, 3523 jni_IsInstanceOf, 3524 3525 jni_GetMethodID, 3526 3527 jni_CallObjectMethod, 3528 jni_CallObjectMethodV, 3529 jni_CallObjectMethodA, 3530 jni_CallBooleanMethod, 3531 jni_CallBooleanMethodV, 3532 jni_CallBooleanMethodA, 3533 jni_CallByteMethod, 3534 jni_CallByteMethodV, 3535 jni_CallByteMethodA, 3536 jni_CallCharMethod, 3537 jni_CallCharMethodV, 3538 jni_CallCharMethodA, 3539 jni_CallShortMethod, 3540 jni_CallShortMethodV, 3541 jni_CallShortMethodA, 3542 jni_CallIntMethod, 3543 jni_CallIntMethodV, 3544 jni_CallIntMethodA, 3545 jni_CallLongMethod, 3546 jni_CallLongMethodV, 3547 jni_CallLongMethodA, 3548 jni_CallFloatMethod, 3549 jni_CallFloatMethodV, 3550 jni_CallFloatMethodA, 3551 jni_CallDoubleMethod, 3552 jni_CallDoubleMethodV, 3553 jni_CallDoubleMethodA, 3554 jni_CallVoidMethod, 3555 jni_CallVoidMethodV, 3556 jni_CallVoidMethodA, 3557 3558 jni_CallNonvirtualObjectMethod, 3559 jni_CallNonvirtualObjectMethodV, 3560 jni_CallNonvirtualObjectMethodA, 3561 jni_CallNonvirtualBooleanMethod, 3562 jni_CallNonvirtualBooleanMethodV, 3563 jni_CallNonvirtualBooleanMethodA, 3564 jni_CallNonvirtualByteMethod, 3565 jni_CallNonvirtualByteMethodV, 3566 jni_CallNonvirtualByteMethodA, 3567 jni_CallNonvirtualCharMethod, 3568 jni_CallNonvirtualCharMethodV, 3569 jni_CallNonvirtualCharMethodA, 3570 jni_CallNonvirtualShortMethod, 3571 jni_CallNonvirtualShortMethodV, 3572 jni_CallNonvirtualShortMethodA, 3573 jni_CallNonvirtualIntMethod, 3574 jni_CallNonvirtualIntMethodV, 3575 jni_CallNonvirtualIntMethodA, 3576 jni_CallNonvirtualLongMethod, 3577 jni_CallNonvirtualLongMethodV, 3578 jni_CallNonvirtualLongMethodA, 3579 jni_CallNonvirtualFloatMethod, 3580 jni_CallNonvirtualFloatMethodV, 3581 jni_CallNonvirtualFloatMethodA, 3582 jni_CallNonvirtualDoubleMethod, 3583 jni_CallNonvirtualDoubleMethodV, 3584 jni_CallNonvirtualDoubleMethodA, 3585 jni_CallNonvirtualVoidMethod, 3586 jni_CallNonvirtualVoidMethodV, 3587 jni_CallNonvirtualVoidMethodA, 3588 3589 jni_GetFieldID, 3590 3591 jni_GetObjectField, 3592 jni_GetBooleanField, 3593 jni_GetByteField, 3594 jni_GetCharField, 3595 jni_GetShortField, 3596 jni_GetIntField, 3597 jni_GetLongField, 3598 jni_GetFloatField, 3599 jni_GetDoubleField, 3600 3601 jni_SetObjectField, 3602 jni_SetBooleanField, 3603 jni_SetByteField, 3604 jni_SetCharField, 3605 jni_SetShortField, 3606 jni_SetIntField, 3607 jni_SetLongField, 3608 jni_SetFloatField, 3609 jni_SetDoubleField, 3610 3611 jni_GetStaticMethodID, 3612 3613 jni_CallStaticObjectMethod, 3614 jni_CallStaticObjectMethodV, 3615 jni_CallStaticObjectMethodA, 3616 jni_CallStaticBooleanMethod, 3617 jni_CallStaticBooleanMethodV, 3618 jni_CallStaticBooleanMethodA, 3619 jni_CallStaticByteMethod, 3620 jni_CallStaticByteMethodV, 3621 jni_CallStaticByteMethodA, 3622 jni_CallStaticCharMethod, 3623 jni_CallStaticCharMethodV, 3624 jni_CallStaticCharMethodA, 3625 jni_CallStaticShortMethod, 3626 jni_CallStaticShortMethodV, 3627 jni_CallStaticShortMethodA, 3628 jni_CallStaticIntMethod, 3629 jni_CallStaticIntMethodV, 3630 jni_CallStaticIntMethodA, 3631 jni_CallStaticLongMethod, 3632 jni_CallStaticLongMethodV, 3633 jni_CallStaticLongMethodA, 3634 jni_CallStaticFloatMethod, 3635 jni_CallStaticFloatMethodV, 3636 jni_CallStaticFloatMethodA, 3637 jni_CallStaticDoubleMethod, 3638 jni_CallStaticDoubleMethodV, 3639 jni_CallStaticDoubleMethodA, 3640 jni_CallStaticVoidMethod, 3641 jni_CallStaticVoidMethodV, 3642 jni_CallStaticVoidMethodA, 3643 3644 jni_GetStaticFieldID, 3645 3646 jni_GetStaticObjectField, 3647 jni_GetStaticBooleanField, 3648 jni_GetStaticByteField, 3649 jni_GetStaticCharField, 3650 jni_GetStaticShortField, 3651 jni_GetStaticIntField, 3652 jni_GetStaticLongField, 3653 jni_GetStaticFloatField, 3654 jni_GetStaticDoubleField, 3655 3656 jni_SetStaticObjectField, 3657 jni_SetStaticBooleanField, 3658 jni_SetStaticByteField, 3659 jni_SetStaticCharField, 3660 jni_SetStaticShortField, 3661 jni_SetStaticIntField, 3662 jni_SetStaticLongField, 3663 jni_SetStaticFloatField, 3664 jni_SetStaticDoubleField, 3665 3666 jni_NewString, 3667 jni_GetStringLength, 3668 jni_GetStringChars, 3669 jni_ReleaseStringChars, 3670 3671 jni_NewStringUTF, 3672 jni_GetStringUTFLength, 3673 jni_GetStringUTFChars, 3674 jni_ReleaseStringUTFChars, 3675 3676 jni_GetArrayLength, 3677 3678 jni_NewObjectArray, 3679 jni_GetObjectArrayElement, 3680 jni_SetObjectArrayElement, 3681 3682 jni_NewBooleanArray, 3683 jni_NewByteArray, 3684 jni_NewCharArray, 3685 jni_NewShortArray, 3686 jni_NewIntArray, 3687 jni_NewLongArray, 3688 jni_NewFloatArray, 3689 jni_NewDoubleArray, 3690 3691 jni_GetBooleanArrayElements, 3692 jni_GetByteArrayElements, 3693 jni_GetCharArrayElements, 3694 jni_GetShortArrayElements, 3695 jni_GetIntArrayElements, 3696 jni_GetLongArrayElements, 3697 jni_GetFloatArrayElements, 3698 jni_GetDoubleArrayElements, 3699 3700 jni_ReleaseBooleanArrayElements, 3701 jni_ReleaseByteArrayElements, 3702 jni_ReleaseCharArrayElements, 3703 jni_ReleaseShortArrayElements, 3704 jni_ReleaseIntArrayElements, 3705 jni_ReleaseLongArrayElements, 3706 jni_ReleaseFloatArrayElements, 3707 jni_ReleaseDoubleArrayElements, 3708 3709 jni_GetBooleanArrayRegion, 3710 jni_GetByteArrayRegion, 3711 jni_GetCharArrayRegion, 3712 jni_GetShortArrayRegion, 3713 jni_GetIntArrayRegion, 3714 jni_GetLongArrayRegion, 3715 jni_GetFloatArrayRegion, 3716 jni_GetDoubleArrayRegion, 3717 3718 jni_SetBooleanArrayRegion, 3719 jni_SetByteArrayRegion, 3720 jni_SetCharArrayRegion, 3721 jni_SetShortArrayRegion, 3722 jni_SetIntArrayRegion, 3723 jni_SetLongArrayRegion, 3724 jni_SetFloatArrayRegion, 3725 jni_SetDoubleArrayRegion, 3726 3727 jni_RegisterNatives, 3728 jni_UnregisterNatives, 3729 3730 jni_MonitorEnter, 3731 jni_MonitorExit, 3732 3733 jni_GetJavaVM, 3734 3735 jni_GetStringRegion, 3736 jni_GetStringUTFRegion, 3737 3738 jni_GetPrimitiveArrayCritical, 3739 jni_ReleasePrimitiveArrayCritical, 3740 3741 jni_GetStringCritical, 3742 jni_ReleaseStringCritical, 3743 3744 jni_NewWeakGlobalRef, 3745 jni_DeleteWeakGlobalRef, 3746 3747 jni_ExceptionCheck, 3748 3749 jni_NewDirectByteBuffer, 3750 jni_GetDirectBufferAddress, 3751 jni_GetDirectBufferCapacity, 3752 3753 // New 1_6 features 3754 3755 jni_GetObjectRefType, 3756 3757 // Module features 3758 3759 jni_GetModule 3760 }; 3761 3762 3763 // For jvmti use to modify jni function table. 3764 // Java threads in native contiues to run until it is transitioned 3765 // to VM at safepoint. Before the transition or before it is blocked 3766 // for safepoint it may access jni function table. VM could crash if 3767 // any java thread access the jni function table in the middle of memcpy. 3768 // To avoid this each function pointers are copied automically. 3769 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3770 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3771 intptr_t *a = (intptr_t *) jni_functions(); 3772 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3773 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3774 Atomic::store(*b++, a++); 3775 } 3776 } 3777 3778 void quicken_jni_functions() { 3779 // Replace Get<Primitive>Field with fast versions 3780 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3781 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) { 3782 address func; 3783 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3784 if (func != (address)-1) { 3785 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3786 } 3787 func = JNI_FastGetField::generate_fast_get_byte_field(); 3788 if (func != (address)-1) { 3789 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3790 } 3791 func = JNI_FastGetField::generate_fast_get_char_field(); 3792 if (func != (address)-1) { 3793 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3794 } 3795 func = JNI_FastGetField::generate_fast_get_short_field(); 3796 if (func != (address)-1) { 3797 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3798 } 3799 func = JNI_FastGetField::generate_fast_get_int_field(); 3800 if (func != (address)-1) { 3801 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3802 } 3803 func = JNI_FastGetField::generate_fast_get_long_field(); 3804 if (func != (address)-1) { 3805 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3806 } 3807 func = JNI_FastGetField::generate_fast_get_float_field(); 3808 if (func != (address)-1) { 3809 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3810 } 3811 func = JNI_FastGetField::generate_fast_get_double_field(); 3812 if (func != (address)-1) { 3813 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3814 } 3815 } 3816 } 3817 3818 // Returns the function structure 3819 struct JNINativeInterface_* jni_functions() { 3820 #if INCLUDE_JNI_CHECK 3821 if (CheckJNICalls) return jni_functions_check(); 3822 #endif // INCLUDE_JNI_CHECK 3823 return &jni_NativeInterface; 3824 } 3825 3826 // Returns the function structure 3827 struct JNINativeInterface_* jni_functions_nocheck() { 3828 return &jni_NativeInterface; 3829 } 3830 3831 static void post_thread_start_event(const JavaThread* jt) { 3832 assert(jt != NULL, "invariant"); 3833 EventThreadStart event; 3834 if (event.should_commit()) { 3835 event.set_thread(JFR_THREAD_ID(jt)); 3836 event.commit(); 3837 } 3838 } 3839 3840 // Invocation API 3841 3842 3843 // Forward declaration 3844 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3845 3846 // Global invocation API vars 3847 volatile int vm_created = 0; 3848 // Indicate whether it is safe to recreate VM 3849 volatile int safe_to_recreate_vm = 1; 3850 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3851 3852 3853 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3854 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3855 3856 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3857 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3858 3859 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3860 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3861 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3862 jint ret = JNI_ERR; 3863 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3864 3865 if (Threads::is_supported_jni_version(args->version)) { 3866 ret = JNI_OK; 3867 } 3868 // 1.1 style no longer supported in hotspot. 3869 // According the JNI spec, we should update args->version on return. 3870 // We also use the structure to communicate with launcher about default 3871 // stack size. 3872 if (args->version == JNI_VERSION_1_1) { 3873 args->version = JNI_VERSION_1_2; 3874 // javaStackSize is int in arguments structure 3875 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3876 args->javaStackSize = (jint)(ThreadStackSize * K); 3877 } 3878 return ret; 3879 } 3880 3881 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3882 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3883 3884 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3885 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3886 3887 jint result = JNI_ERR; 3888 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3889 3890 // We're about to use Atomic::xchg for synchronization. Some Zero 3891 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3892 // but __sync_lock_test_and_set is not guaranteed to do what we want 3893 // on all architectures. So we check it works before relying on it. 3894 #if defined(ZERO) && defined(ASSERT) 3895 { 3896 jint a = 0xcafebabe; 3897 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3898 void *c = &a; 3899 void *d = Atomic::xchg(&b, &c); 3900 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3901 assert(c == &b && d == &a, "Atomic::xchg() works"); 3902 } 3903 #endif // ZERO && ASSERT 3904 3905 // At the moment it's only possible to have one Java VM, 3906 // since some of the runtime state is in global variables. 3907 3908 // We cannot use our mutex locks here, since they only work on 3909 // Threads. We do an atomic compare and exchange to ensure only 3910 // one thread can call this method at a time 3911 3912 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3913 // the add/dec implementations are dependent on whether we are running 3914 // on a multiprocessor Atomic::xchg does not have this problem. 3915 if (Atomic::xchg(1, &vm_created) == 1) { 3916 return JNI_EEXIST; // already created, or create attempt in progress 3917 } 3918 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3919 return JNI_ERR; // someone tried and failed and retry not allowed. 3920 } 3921 3922 assert(vm_created == 1, "vm_created is true during the creation"); 3923 3924 /** 3925 * Certain errors during initialization are recoverable and do not 3926 * prevent this method from being called again at a later time 3927 * (perhaps with different arguments). However, at a certain 3928 * point during initialization if an error occurs we cannot allow 3929 * this function to be called again (or it will crash). In those 3930 * situations, the 'canTryAgain' flag is set to false, which atomically 3931 * sets safe_to_recreate_vm to 1, such that any new call to 3932 * JNI_CreateJavaVM will immediately fail using the above logic. 3933 */ 3934 bool can_try_again = true; 3935 3936 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3937 if (result == JNI_OK) { 3938 JavaThread *thread = JavaThread::current(); 3939 assert(!thread->has_pending_exception(), "should have returned not OK"); 3940 /* thread is thread_in_vm here */ 3941 *vm = (JavaVM *)(&main_vm); 3942 *(JNIEnv**)penv = thread->jni_environment(); 3943 3944 #if INCLUDE_JVMCI 3945 if (EnableJVMCI) { 3946 if (UseJVMCICompiler) { 3947 // JVMCI is initialized on a CompilerThread 3948 if (BootstrapJVMCI) { 3949 JavaThread* THREAD = thread; 3950 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3951 compiler->bootstrap(THREAD); 3952 if (HAS_PENDING_EXCEPTION) { 3953 HandleMark hm; 3954 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3955 } 3956 } 3957 } 3958 } 3959 #endif 3960 3961 // Tracks the time application was running before GC 3962 RuntimeService::record_application_start(); 3963 3964 // Notify JVMTI 3965 if (JvmtiExport::should_post_thread_life()) { 3966 JvmtiExport::post_thread_start(thread); 3967 } 3968 3969 post_thread_start_event(thread); 3970 3971 #ifndef PRODUCT 3972 // Check if we should compile all classes on bootclasspath 3973 if (CompileTheWorld) ClassLoader::compile_the_world(); 3974 if (ReplayCompiles) ciReplay::replay(thread); 3975 3976 // Some platforms (like Win*) need a wrapper around these test 3977 // functions in order to properly handle error conditions. 3978 VMError::test_error_handler(); 3979 #endif 3980 3981 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3982 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3983 } else { 3984 // If create_vm exits because of a pending exception, exit with that 3985 // exception. In the future when we figure out how to reclaim memory, 3986 // we may be able to exit with JNI_ERR and allow the calling application 3987 // to continue. 3988 if (Universe::is_fully_initialized()) { 3989 // otherwise no pending exception possible - VM will already have aborted 3990 JavaThread* THREAD = JavaThread::current(); 3991 if (HAS_PENDING_EXCEPTION) { 3992 HandleMark hm; 3993 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3994 } 3995 } 3996 3997 if (can_try_again) { 3998 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3999 safe_to_recreate_vm = 1; 4000 } 4001 4002 // Creation failed. We must reset vm_created 4003 *vm = 0; 4004 *(JNIEnv**)penv = 0; 4005 // reset vm_created last to avoid race condition. Use OrderAccess to 4006 // control both compiler and architectural-based reordering. 4007 OrderAccess::release_store(&vm_created, 0); 4008 } 4009 4010 // Flush stdout and stderr before exit. 4011 fflush(stdout); 4012 fflush(stderr); 4013 4014 return result; 4015 4016 } 4017 4018 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4019 jint result = JNI_ERR; 4020 // On Windows, let CreateJavaVM run with SEH protection 4021 #ifdef _WIN32 4022 __try { 4023 #endif 4024 result = JNI_CreateJavaVM_inner(vm, penv, args); 4025 #ifdef _WIN32 4026 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4027 // Nothing to do. 4028 } 4029 #endif 4030 return result; 4031 } 4032 4033 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4034 // See bug 4367188, the wrapper can sometimes cause VM crashes 4035 // JNIWrapper("GetCreatedJavaVMs"); 4036 4037 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4038 4039 if (vm_created == 1) { 4040 if (numVMs != NULL) *numVMs = 1; 4041 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4042 } else { 4043 if (numVMs != NULL) *numVMs = 0; 4044 } 4045 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4046 return JNI_OK; 4047 } 4048 4049 extern "C" { 4050 4051 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4052 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4053 4054 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4055 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4056 jint res = JNI_ERR; 4057 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4058 4059 if (vm_created == 0) { 4060 res = JNI_ERR; 4061 return res; 4062 } 4063 4064 JNIWrapper("DestroyJavaVM"); 4065 JNIEnv *env; 4066 JavaVMAttachArgs destroyargs; 4067 destroyargs.version = CurrentVersion; 4068 destroyargs.name = (char *)"DestroyJavaVM"; 4069 destroyargs.group = NULL; 4070 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4071 if (res != JNI_OK) { 4072 return res; 4073 } 4074 4075 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4076 JavaThread* thread = JavaThread::current(); 4077 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4078 if (Threads::destroy_vm()) { 4079 // Should not change thread state, VM is gone 4080 vm_created = 0; 4081 res = JNI_OK; 4082 return res; 4083 } else { 4084 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4085 res = JNI_ERR; 4086 return res; 4087 } 4088 } 4089 4090 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4091 jint result = JNI_ERR; 4092 // On Windows, we need SEH protection 4093 #ifdef _WIN32 4094 __try { 4095 #endif 4096 result = jni_DestroyJavaVM_inner(vm); 4097 #ifdef _WIN32 4098 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4099 // Nothing to do. 4100 } 4101 #endif 4102 return result; 4103 } 4104 4105 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4106 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4107 4108 // Check below commented out from JDK1.2fcs as well 4109 /* 4110 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4111 return JNI_EVERSION; 4112 } 4113 */ 4114 4115 Thread* t = Thread::current_or_null(); 4116 if (t != NULL) { 4117 // If the thread has been attached this operation is a no-op 4118 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4119 return JNI_OK; 4120 } 4121 4122 // Create a thread and mark it as attaching so it will be skipped by the 4123 // ThreadsListEnumerator - see CR 6404306 4124 JavaThread* thread = new JavaThread(true); 4125 4126 // Set correct safepoint info. The thread is going to call into Java when 4127 // initializing the Java level thread object. Hence, the correct state must 4128 // be set in order for the Safepoint code to deal with it correctly. 4129 thread->set_thread_state(_thread_in_vm); 4130 thread->record_stack_base_and_size(); 4131 thread->register_thread_stack_with_NMT(); 4132 thread->initialize_thread_current(); 4133 4134 if (!os::create_attached_thread(thread)) { 4135 thread->smr_delete(); 4136 return JNI_ERR; 4137 } 4138 // Enable stack overflow checks 4139 thread->create_stack_guard_pages(); 4140 4141 thread->initialize_tlab(); 4142 4143 thread->cache_global_variables(); 4144 4145 // Crucial that we do not have a safepoint check for this thread, since it has 4146 // not been added to the Thread list yet. 4147 { Threads_lock->lock_without_safepoint_check(); 4148 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4149 // avoid this thread trying to do a GC before it is added to the thread-list 4150 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4151 Threads::add(thread, daemon); 4152 Threads_lock->unlock(); 4153 } 4154 // Create thread group and name info from attach arguments 4155 oop group = NULL; 4156 char* thread_name = NULL; 4157 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4158 group = JNIHandles::resolve(args->group); 4159 thread_name = args->name; // may be NULL 4160 } 4161 if (group == NULL) group = Universe::main_thread_group(); 4162 4163 // Create Java level thread object and attach it to this thread 4164 bool attach_failed = false; 4165 { 4166 EXCEPTION_MARK; 4167 HandleMark hm(THREAD); 4168 Handle thread_group(THREAD, group); 4169 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4170 if (HAS_PENDING_EXCEPTION) { 4171 CLEAR_PENDING_EXCEPTION; 4172 // cleanup outside the handle mark. 4173 attach_failed = true; 4174 } 4175 } 4176 4177 if (attach_failed) { 4178 // Added missing cleanup 4179 thread->cleanup_failed_attach_current_thread(); 4180 return JNI_ERR; 4181 } 4182 4183 // mark the thread as no longer attaching 4184 // this uses a fence to push the change through so we don't have 4185 // to regrab the threads_lock 4186 thread->set_done_attaching_via_jni(); 4187 4188 // Set java thread status. 4189 java_lang_Thread::set_thread_status(thread->threadObj(), 4190 java_lang_Thread::RUNNABLE); 4191 4192 // Notify the debugger 4193 if (JvmtiExport::should_post_thread_life()) { 4194 JvmtiExport::post_thread_start(thread); 4195 } 4196 4197 post_thread_start_event(thread); 4198 4199 *(JNIEnv**)penv = thread->jni_environment(); 4200 4201 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4202 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4203 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4204 // needed. 4205 4206 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4207 4208 // Perform any platform dependent FPU setup 4209 os::setup_fpu(); 4210 4211 return JNI_OK; 4212 } 4213 4214 4215 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4216 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4217 if (vm_created == 0) { 4218 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4219 return JNI_ERR; 4220 } 4221 4222 JNIWrapper("AttachCurrentThread"); 4223 jint ret = attach_current_thread(vm, penv, _args, false); 4224 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4225 return ret; 4226 } 4227 4228 4229 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4230 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4231 4232 JNIWrapper("DetachCurrentThread"); 4233 4234 // If the thread has already been detached the operation is a no-op 4235 if (Thread::current_or_null() == NULL) { 4236 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4237 return JNI_OK; 4238 } 4239 4240 VM_Exit::block_if_vm_exited(); 4241 4242 JavaThread* thread = JavaThread::current(); 4243 if (thread->has_last_Java_frame()) { 4244 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4245 // Can't detach a thread that's running java, that can't work. 4246 return JNI_ERR; 4247 } 4248 4249 // Safepoint support. Have to do call-back to safepoint code, if in the 4250 // middle of a safepoint operation 4251 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4252 4253 // XXX: Note that JavaThread::exit() call below removes the guards on the 4254 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4255 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4256 // of the guards is visible in jni_AttachCurrentThread above, 4257 // the removal of the guards is buried below in JavaThread::exit() 4258 // here. The abstraction should be more symmetrically either exposed 4259 // or hidden (e.g. it could probably be hidden in the same 4260 // (platform-dependent) methods where we do alternate stack 4261 // maintenance work?) 4262 thread->exit(false, JavaThread::jni_detach); 4263 thread->smr_delete(); 4264 4265 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4266 return JNI_OK; 4267 } 4268 4269 DT_RETURN_MARK_DECL(GetEnv, jint 4270 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4271 4272 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4273 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4274 jint ret = JNI_ERR; 4275 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4276 4277 if (vm_created == 0) { 4278 *penv = NULL; 4279 ret = JNI_EDETACHED; 4280 return ret; 4281 } 4282 4283 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4284 return ret; 4285 } 4286 4287 #ifndef JVMPI_VERSION_1 4288 // need these in order to be polite about older agents 4289 #define JVMPI_VERSION_1 ((jint)0x10000001) 4290 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4291 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4292 #endif // !JVMPI_VERSION_1 4293 4294 Thread* thread = Thread::current_or_null(); 4295 if (thread != NULL && thread->is_Java_thread()) { 4296 if (Threads::is_supported_jni_version_including_1_1(version)) { 4297 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4298 ret = JNI_OK; 4299 return ret; 4300 4301 } else if (version == JVMPI_VERSION_1 || 4302 version == JVMPI_VERSION_1_1 || 4303 version == JVMPI_VERSION_1_2) { 4304 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4305 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4306 ret = JNI_EVERSION; 4307 return ret; 4308 } else if (JvmtiExport::is_jvmdi_version(version)) { 4309 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4310 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4311 ret = JNI_EVERSION; 4312 return ret; 4313 } else { 4314 *penv = NULL; 4315 ret = JNI_EVERSION; 4316 return ret; 4317 } 4318 } else { 4319 *penv = NULL; 4320 ret = JNI_EDETACHED; 4321 return ret; 4322 } 4323 } 4324 4325 4326 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4327 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4328 if (vm_created == 0) { 4329 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4330 return JNI_ERR; 4331 } 4332 4333 JNIWrapper("AttachCurrentThreadAsDaemon"); 4334 jint ret = attach_current_thread(vm, penv, _args, true); 4335 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4336 return ret; 4337 } 4338 4339 4340 } // End extern "C" 4341 4342 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4343 NULL, 4344 NULL, 4345 NULL, 4346 4347 jni_DestroyJavaVM, 4348 jni_AttachCurrentThread, 4349 jni_DetachCurrentThread, 4350 jni_GetEnv, 4351 jni_AttachCurrentThreadAsDaemon 4352 };