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.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/internalVMTests.hpp" 90 #include "utilities/macros.hpp" 91 #include "utilities/vmError.hpp" 92 #if INCLUDE_JVMCI 93 #include "jvmci/jvmciCompiler.hpp" 94 #include "jvmci/jvmciRuntime.hpp" 95 #endif 96 97 static jint CurrentVersion = JNI_VERSION_10; 98 99 #ifdef _WIN32 100 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 101 #endif 102 103 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 104 // '-return' probe regardless of the return path is taken out of the function. 105 // Methods that have multiple return paths use this to avoid having to 106 // instrument each return path. Methods that use CHECK or THROW must use this 107 // since those macros can cause an immedate uninstrumented return. 108 // 109 // In order to get the return value, a reference to the variable containing 110 // the return value must be passed to the contructor of the object, and 111 // the return value must be set before return (since the mark object has 112 // a reference to it). 113 // 114 // Example: 115 // DT_RETURN_MARK_DECL(SomeFunc, int); 116 // JNI_ENTRY(int, SomeFunc, ...) 117 // int return_value = 0; 118 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 119 // foo(CHECK_0) 120 // return_value = 5; 121 // return return_value; 122 // JNI_END 123 #define DT_RETURN_MARK_DECL(name, type, probe) \ 124 DTRACE_ONLY( \ 125 class DTraceReturnProbeMark_##name { \ 126 public: \ 127 const type& _ret_ref; \ 128 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 129 ~DTraceReturnProbeMark_##name() { \ 130 probe; \ 131 } \ 132 } \ 133 ) 134 // Void functions are simpler since there's no return value 135 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 136 DTRACE_ONLY( \ 137 class DTraceReturnProbeMark_##name { \ 138 public: \ 139 ~DTraceReturnProbeMark_##name() { \ 140 probe; \ 141 } \ 142 } \ 143 ) 144 145 // Place these macros in the function to mark the return. Non-void 146 // functions need the type and address of the return value. 147 #define DT_RETURN_MARK(name, type, ref) \ 148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 149 #define DT_VOID_RETURN_MARK(name) \ 150 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 151 152 153 // Use these to select distinct code for floating-point vs. non-floating point 154 // situations. Used from within common macros where we need slightly 155 // different behavior for Float/Double 156 #define FP_SELECT_Boolean(intcode, fpcode) intcode 157 #define FP_SELECT_Byte(intcode, fpcode) intcode 158 #define FP_SELECT_Char(intcode, fpcode) intcode 159 #define FP_SELECT_Short(intcode, fpcode) intcode 160 #define FP_SELECT_Object(intcode, fpcode) intcode 161 #define FP_SELECT_Int(intcode, fpcode) intcode 162 #define FP_SELECT_Long(intcode, fpcode) intcode 163 #define FP_SELECT_Float(intcode, fpcode) fpcode 164 #define FP_SELECT_Double(intcode, fpcode) fpcode 165 #define FP_SELECT(TypeName, intcode, fpcode) \ 166 FP_SELECT_##TypeName(intcode, fpcode) 167 168 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 169 // (dtrace doesn't do FP yet) 170 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 171 FP_SELECT(TypeName, \ 172 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 173 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 174 FP_SELECT(TypeName, \ 175 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 176 177 178 // out-of-line helpers for class jfieldIDWorkaround: 179 180 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 181 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 182 uintptr_t as_uint = (uintptr_t) id; 183 intptr_t offset = raw_instance_offset(id); 184 if (is_checked_jfieldID(id)) { 185 if (!klass_hash_ok(k, id)) { 186 return false; 187 } 188 } 189 return InstanceKlass::cast(k)->contains_field_offset(offset); 190 } else { 191 JNIid* result = (JNIid*) id; 192 #ifdef ASSERT 193 return result != NULL && result->is_static_field_id(); 194 #else 195 return result != NULL; 196 #endif 197 } 198 } 199 200 201 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 202 if (offset <= small_offset_mask) { 203 Klass* field_klass = k; 204 Klass* super_klass = field_klass->super(); 205 // With compressed oops the most super class with nonstatic fields would 206 // be the owner of fields embedded in the header. 207 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 208 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 209 field_klass = super_klass; // super contains the field also 210 super_klass = field_klass->super(); 211 } 212 debug_only(NoSafepointVerifier nosafepoint;) 213 uintptr_t klass_hash = field_klass->identity_hash(); 214 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 215 } else { 216 #if 0 217 #ifndef PRODUCT 218 { 219 ResourceMark rm; 220 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 221 } 222 #endif 223 #endif 224 return 0; 225 } 226 } 227 228 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 229 uintptr_t as_uint = (uintptr_t) id; 230 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 231 do { 232 debug_only(NoSafepointVerifier nosafepoint;) 233 // Could use a non-blocking query for identity_hash here... 234 if ((k->identity_hash() & klass_mask) == klass_hash) 235 return true; 236 k = k->super(); 237 } while (k != NULL); 238 return false; 239 } 240 241 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 242 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 243 uintptr_t as_uint = (uintptr_t) id; 244 intptr_t offset = raw_instance_offset(id); 245 if (VerifyJNIFields) { 246 if (is_checked_jfieldID(id)) { 247 guarantee(klass_hash_ok(k, id), 248 "Bug in native code: jfieldID class must match object"); 249 } else { 250 #if 0 251 #ifndef PRODUCT 252 if (Verbose) { 253 ResourceMark rm; 254 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 255 } 256 #endif 257 #endif 258 } 259 } 260 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 261 "Bug in native code: jfieldID offset must address interior of object"); 262 } 263 264 // Wrapper to trace JNI functions 265 266 #ifdef ASSERT 267 Histogram* JNIHistogram; 268 static volatile int JNIHistogram_lock = 0; 269 270 class JNIHistogramElement : public HistogramElement { 271 public: 272 JNIHistogramElement(const char* name); 273 }; 274 275 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 276 _name = elementName; 277 uintx count = 0; 278 279 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 280 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 281 count +=1; 282 if ( (WarnOnStalledSpinLock > 0) 283 && (count % WarnOnStalledSpinLock == 0)) { 284 warning("JNIHistogram_lock seems to be stalled"); 285 } 286 } 287 } 288 289 290 if(JNIHistogram == NULL) 291 JNIHistogram = new Histogram("JNI Call Counts",100); 292 293 JNIHistogram->add_element(this); 294 Atomic::dec(&JNIHistogram_lock); 295 } 296 297 #define JNICountWrapper(arg) \ 298 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 299 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 300 if (e != NULL) e->increment_count() 301 #define JNIWrapper(arg) JNICountWrapper(arg); 302 #else 303 #define JNIWrapper(arg) 304 #endif 305 306 307 // Implementation of JNI entries 308 309 DT_RETURN_MARK_DECL(DefineClass, jclass 310 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 311 312 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 313 const jbyte *buf, jsize bufLen)) 314 JNIWrapper("DefineClass"); 315 316 HOTSPOT_JNI_DEFINECLASS_ENTRY( 317 env, (char*) name, loaderRef, (char*) buf, bufLen); 318 319 jclass cls = NULL; 320 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 321 322 TempNewSymbol class_name = NULL; 323 // Since exceptions can be thrown, class initialization can take place 324 // if name is NULL no check for class name in .class stream has to be made. 325 if (name != NULL) { 326 const int str_len = (int)strlen(name); 327 if (str_len > Symbol::max_length()) { 328 // It's impossible to create this class; the name cannot fit 329 // into the constant pool. 330 Exceptions::fthrow(THREAD_AND_LOCATION, 331 vmSymbols::java_lang_NoClassDefFoundError(), 332 "Class name exceeds maximum length of %d: %s", 333 Symbol::max_length(), 334 name); 335 return 0; 336 } 337 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 338 } 339 ResourceMark rm(THREAD); 340 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 341 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 342 343 if (UsePerfData && !class_loader.is_null()) { 344 // check whether the current caller thread holds the lock or not. 345 // If not, increment the corresponding counter 346 if (ObjectSynchronizer:: 347 query_lock_ownership((JavaThread*)THREAD, class_loader) != 348 ObjectSynchronizer::owner_self) { 349 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 350 } 351 } 352 Klass* k = SystemDictionary::resolve_from_stream(class_name, 353 class_loader, 354 Handle(), 355 &st, 356 CHECK_NULL); 357 358 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 359 trace_class_resolution(k); 360 } 361 362 cls = (jclass)JNIHandles::make_local( 363 env, k->java_mirror()); 364 return cls; 365 JNI_END 366 367 368 369 static bool first_time_FindClass = true; 370 371 DT_RETURN_MARK_DECL(FindClass, jclass 372 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 373 374 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 375 JNIWrapper("FindClass"); 376 377 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 378 379 jclass result = NULL; 380 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 381 382 // Remember if we are the first invocation of jni_FindClass 383 bool first_time = first_time_FindClass; 384 first_time_FindClass = false; 385 386 // Sanity check the name: it cannot be null or larger than the maximum size 387 // name we can fit in the constant pool. 388 if (name == NULL) { 389 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 390 } 391 if ((int)strlen(name) > Symbol::max_length()) { 392 Exceptions::fthrow(THREAD_AND_LOCATION, 393 vmSymbols::java_lang_NoClassDefFoundError(), 394 "Class name exceeds maximum length of %d: %s", 395 Symbol::max_length(), 396 name); 397 return 0; 398 } 399 400 //%note jni_3 401 Handle protection_domain; 402 // Find calling class 403 Klass* k = thread->security_get_caller_class(0); 404 // default to the system loader when no context 405 Handle loader(THREAD, SystemDictionary::java_system_loader()); 406 if (k != NULL) { 407 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 408 // in the correct class context. 409 if (k->class_loader() == NULL && 410 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 411 JavaValue result(T_OBJECT); 412 JavaCalls::call_static(&result, k, 413 vmSymbols::getFromClass_name(), 414 vmSymbols::void_class_signature(), 415 CHECK_NULL); 416 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 417 // a non-NULL Class object. When invoked from JNI_OnUnload, 418 // it will return NULL to indicate no context. 419 oop mirror = (oop) result.get_jobject(); 420 if (mirror != NULL) { 421 Klass* fromClass = java_lang_Class::as_Klass(mirror); 422 loader = Handle(THREAD, fromClass->class_loader()); 423 protection_domain = Handle(THREAD, fromClass->protection_domain()); 424 } 425 } else { 426 loader = Handle(THREAD, k->class_loader()); 427 } 428 } 429 430 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 431 result = find_class_from_class_loader(env, sym, true, loader, 432 protection_domain, true, thread); 433 434 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 435 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 436 } 437 438 // If we were the first invocation of jni_FindClass, we enable compilation again 439 // rather than just allowing invocation counter to overflow and decay. 440 // Controlled by flag DelayCompilationDuringStartup. 441 if (first_time && !CompileTheWorld) 442 CompilationPolicy::completed_vm_startup(); 443 444 return result; 445 JNI_END 446 447 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 448 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 449 450 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 451 JNIWrapper("FromReflectedMethod"); 452 453 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 454 455 jmethodID ret = NULL; 456 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 457 458 // method is a handle to a java.lang.reflect.Method object 459 oop reflected = JNIHandles::resolve_non_null(method); 460 oop mirror = NULL; 461 int slot = 0; 462 463 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 464 mirror = java_lang_reflect_Constructor::clazz(reflected); 465 slot = java_lang_reflect_Constructor::slot(reflected); 466 } else { 467 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 468 mirror = java_lang_reflect_Method::clazz(reflected); 469 slot = java_lang_reflect_Method::slot(reflected); 470 } 471 Klass* k1 = java_lang_Class::as_Klass(mirror); 472 473 // Make sure class is initialized before handing id's out to methods 474 k1->initialize(CHECK_NULL); 475 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 476 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 477 return ret; 478 JNI_END 479 480 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 481 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 482 483 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 484 JNIWrapper("FromReflectedField"); 485 486 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 487 488 jfieldID ret = NULL; 489 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 490 491 // field is a handle to a java.lang.reflect.Field object 492 oop reflected = JNIHandles::resolve_non_null(field); 493 oop mirror = java_lang_reflect_Field::clazz(reflected); 494 Klass* k1 = java_lang_Class::as_Klass(mirror); 495 int slot = java_lang_reflect_Field::slot(reflected); 496 int modifiers = java_lang_reflect_Field::modifiers(reflected); 497 498 // Make sure class is initialized before handing id's out to fields 499 k1->initialize(CHECK_NULL); 500 501 // First check if this is a static field 502 if (modifiers & JVM_ACC_STATIC) { 503 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 504 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 505 assert(id != NULL, "corrupt Field object"); 506 debug_only(id->set_is_static_field_id();) 507 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 508 ret = jfieldIDWorkaround::to_static_jfieldID(id); 509 return ret; 510 } 511 512 // The slot is the index of the field description in the field-array 513 // The jfieldID is the offset of the field within the object 514 // It may also have hash bits for k, if VerifyJNIFields is turned on. 515 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 516 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 517 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 518 return ret; 519 JNI_END 520 521 522 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 523 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 524 525 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 526 JNIWrapper("ToReflectedMethod"); 527 528 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 529 530 jobject ret = NULL; 531 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 532 533 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 534 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 535 oop reflection_method; 536 if (m->is_initializer()) { 537 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 538 } else { 539 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 540 } 541 ret = JNIHandles::make_local(env, reflection_method); 542 return ret; 543 JNI_END 544 545 DT_RETURN_MARK_DECL(GetSuperclass, jclass 546 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 547 548 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 549 JNIWrapper("GetSuperclass"); 550 551 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 552 553 jclass obj = NULL; 554 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 555 556 oop mirror = JNIHandles::resolve_non_null(sub); 557 // primitive classes return NULL 558 if (java_lang_Class::is_primitive(mirror)) return NULL; 559 560 // Rules of Class.getSuperClass as implemented by KLass::java_super: 561 // arrays return Object 562 // interfaces return NULL 563 // proper classes return Klass::super() 564 Klass* k = java_lang_Class::as_Klass(mirror); 565 if (k->is_interface()) return NULL; 566 567 // return mirror for superclass 568 Klass* super = k->java_super(); 569 // super2 is the value computed by the compiler's getSuperClass intrinsic: 570 debug_only(Klass* super2 = ( k->is_array_klass() 571 ? SystemDictionary::Object_klass() 572 : k->super() ) ); 573 assert(super == super2, 574 "java_super computation depends on interface, array, other super"); 575 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 576 return obj; 577 JNI_END 578 579 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 580 JNIWrapper("IsSubclassOf"); 581 582 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 583 584 oop sub_mirror = JNIHandles::resolve_non_null(sub); 585 oop super_mirror = JNIHandles::resolve_non_null(super); 586 if (java_lang_Class::is_primitive(sub_mirror) || 587 java_lang_Class::is_primitive(super_mirror)) { 588 jboolean ret = oopDesc::equals(sub_mirror, super_mirror); 589 590 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 591 return ret; 592 } 593 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 594 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 595 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 596 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 597 JNI_TRUE : JNI_FALSE; 598 599 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 600 return ret; 601 JNI_END 602 603 604 DT_RETURN_MARK_DECL(Throw, jint 605 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 606 607 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 608 JNIWrapper("Throw"); 609 610 HOTSPOT_JNI_THROW_ENTRY(env, obj); 611 612 jint ret = JNI_OK; 613 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 614 615 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 616 ShouldNotReachHere(); 617 return 0; // Mute compiler. 618 JNI_END 619 620 621 DT_RETURN_MARK_DECL(ThrowNew, jint 622 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 623 624 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 625 JNIWrapper("ThrowNew"); 626 627 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 628 629 jint ret = JNI_OK; 630 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 631 632 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 633 Symbol* name = k->name(); 634 Handle class_loader (THREAD, k->class_loader()); 635 Handle protection_domain (THREAD, k->protection_domain()); 636 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 637 ShouldNotReachHere(); 638 return 0; // Mute compiler. 639 JNI_END 640 641 642 // JNI functions only transform a pending async exception to a synchronous 643 // exception in ExceptionOccurred and ExceptionCheck calls, since 644 // delivering an async exception in other places won't change the native 645 // code's control flow and would be harmful when native code further calls 646 // JNI functions with a pending exception. Async exception is also checked 647 // during the call, so ExceptionOccurred/ExceptionCheck won't return 648 // false but deliver the async exception at the very end during 649 // state transition. 650 651 static void jni_check_async_exceptions(JavaThread *thread) { 652 assert(thread == Thread::current(), "must be itself"); 653 thread->check_and_handle_async_exceptions(); 654 } 655 656 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 657 JNIWrapper("ExceptionOccurred"); 658 659 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 660 661 jni_check_async_exceptions(thread); 662 oop exception = thread->pending_exception(); 663 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 664 665 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 666 return ret; 667 JNI_END 668 669 670 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 671 JNIWrapper("ExceptionDescribe"); 672 673 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 674 675 if (thread->has_pending_exception()) { 676 Handle ex(thread, thread->pending_exception()); 677 thread->clear_pending_exception(); 678 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 679 // Don't print anything if we are being killed. 680 } else { 681 jio_fprintf(defaultStream::error_stream(), "Exception "); 682 if (thread != NULL && thread->threadObj() != NULL) { 683 ResourceMark rm(THREAD); 684 jio_fprintf(defaultStream::error_stream(), 685 "in thread \"%s\" ", thread->get_thread_name()); 686 } 687 if (ex->is_a(SystemDictionary::Throwable_klass())) { 688 JavaValue result(T_VOID); 689 JavaCalls::call_virtual(&result, 690 ex, 691 SystemDictionary::Throwable_klass(), 692 vmSymbols::printStackTrace_name(), 693 vmSymbols::void_method_signature(), 694 THREAD); 695 // If an exception is thrown in the call it gets thrown away. Not much 696 // we can do with it. The native code that calls this, does not check 697 // for the exception - hence, it might still be in the thread when DestroyVM gets 698 // called, potentially causing a few asserts to trigger - since no pending exception 699 // is expected. 700 CLEAR_PENDING_EXCEPTION; 701 } else { 702 ResourceMark rm(THREAD); 703 jio_fprintf(defaultStream::error_stream(), 704 ". Uncaught exception of type %s.", 705 ex->klass()->external_name()); 706 } 707 } 708 } 709 710 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 711 JNI_END 712 713 714 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 715 JNIWrapper("ExceptionClear"); 716 717 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 718 719 // The jni code might be using this API to clear java thrown exception. 720 // So just mark jvmti thread exception state as exception caught. 721 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 722 if (state != NULL && state->is_exception_detected()) { 723 state->set_exception_caught(); 724 } 725 thread->clear_pending_exception(); 726 727 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 728 JNI_END 729 730 731 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 732 JNIWrapper("FatalError"); 733 734 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 735 736 tty->print_cr("FATAL ERROR in native method: %s", msg); 737 thread->print_stack(); 738 os::abort(); // Dump core and abort 739 JNI_END 740 741 742 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 743 JNIWrapper("PushLocalFrame"); 744 745 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 746 747 //%note jni_11 748 if (capacity < 0 || 749 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 750 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 751 return JNI_ERR; 752 } 753 JNIHandleBlock* old_handles = thread->active_handles(); 754 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 755 assert(new_handles != NULL, "should not be NULL"); 756 new_handles->set_pop_frame_link(old_handles); 757 thread->set_active_handles(new_handles); 758 jint ret = JNI_OK; 759 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 760 return ret; 761 JNI_END 762 763 764 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 765 JNIWrapper("PopLocalFrame"); 766 767 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 768 769 //%note jni_11 770 Handle result_handle(thread, JNIHandles::resolve(result)); 771 JNIHandleBlock* old_handles = thread->active_handles(); 772 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 773 if (new_handles != NULL) { 774 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 775 // This way code will still work if PopLocalFrame is called without a corresponding 776 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 777 // the release_block call will release the blocks. 778 thread->set_active_handles(new_handles); 779 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 780 JNIHandleBlock::release_block(old_handles, thread); // may block 781 result = JNIHandles::make_local(thread, result_handle()); 782 } 783 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 784 return result; 785 JNI_END 786 787 788 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 789 JNIWrapper("NewGlobalRef"); 790 791 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 792 793 Handle ref_handle(thread, JNIHandles::resolve(ref)); 794 jobject ret = JNIHandles::make_global(ref_handle); 795 796 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 797 return ret; 798 JNI_END 799 800 // Must be JNI_ENTRY (with HandleMark) 801 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 802 JNIWrapper("DeleteGlobalRef"); 803 804 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 805 806 JNIHandles::destroy_global(ref); 807 808 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 809 JNI_END 810 811 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 812 JNIWrapper("DeleteLocalRef"); 813 814 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 815 816 JNIHandles::destroy_local(obj); 817 818 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 819 JNI_END 820 821 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 822 JNIWrapper("IsSameObject"); 823 824 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 825 826 oop a = JNIHandles::resolve(r1); 827 oop b = JNIHandles::resolve(r2); 828 jboolean ret = oopDesc::equals(a, b) ? JNI_TRUE : JNI_FALSE; 829 830 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 831 return ret; 832 JNI_END 833 834 835 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 836 JNIWrapper("NewLocalRef"); 837 838 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 839 840 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 841 842 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 843 return ret; 844 JNI_END 845 846 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 847 JNIWrapper("EnsureLocalCapacity"); 848 849 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 850 851 jint ret; 852 if (capacity >= 0 && 853 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 854 ret = JNI_OK; 855 } else { 856 ret = JNI_ERR; 857 } 858 859 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 860 return ret; 861 JNI_END 862 863 // Return the Handle Type 864 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 865 JNIWrapper("GetObjectRefType"); 866 867 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 868 869 jobjectRefType ret = JNIInvalidRefType; 870 if (obj != NULL) { 871 ret = JNIHandles::handle_type(thread, obj); 872 } 873 874 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 875 return ret; 876 JNI_END 877 878 879 class JNI_ArgumentPusher : public SignatureIterator { 880 protected: 881 JavaCallArguments* _arguments; 882 883 virtual void get_bool () = 0; 884 virtual void get_char () = 0; 885 virtual void get_short () = 0; 886 virtual void get_byte () = 0; 887 virtual void get_int () = 0; 888 virtual void get_long () = 0; 889 virtual void get_float () = 0; 890 virtual void get_double () = 0; 891 virtual void get_object () = 0; 892 893 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 894 this->_return_type = T_ILLEGAL; 895 _arguments = NULL; 896 } 897 898 public: 899 virtual void iterate( uint64_t fingerprint ) = 0; 900 901 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 902 903 inline void do_bool() { if (!is_return_type()) get_bool(); } 904 inline void do_char() { if (!is_return_type()) get_char(); } 905 inline void do_short() { if (!is_return_type()) get_short(); } 906 inline void do_byte() { if (!is_return_type()) get_byte(); } 907 inline void do_int() { if (!is_return_type()) get_int(); } 908 inline void do_long() { if (!is_return_type()) get_long(); } 909 inline void do_float() { if (!is_return_type()) get_float(); } 910 inline void do_double() { if (!is_return_type()) get_double(); } 911 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 912 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 913 inline void do_void() { } 914 915 JavaCallArguments* arguments() { return _arguments; } 916 void push_receiver(Handle h) { _arguments->push_oop(h); } 917 }; 918 919 920 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 921 protected: 922 va_list _ap; 923 924 inline void get_bool() { 925 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 926 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 927 // TemplateInterpreterGenerator::generate_result_handler_for and 928 // SharedRuntime::generate_native_wrapper. 929 jboolean b = va_arg(_ap, jint); 930 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 931 } 932 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 933 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 934 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 935 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 936 937 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 938 939 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 940 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 941 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 942 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 943 944 inline void set_ap(va_list rap) { 945 va_copy(_ap, rap); 946 } 947 948 public: 949 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 950 : JNI_ArgumentPusher(signature) { 951 set_ap(rap); 952 } 953 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 954 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 955 set_ap(rap); 956 } 957 958 // Optimized path if we have the bitvector form of signature 959 void iterate( uint64_t fingerprint ) { 960 if (fingerprint == (uint64_t)CONST64(-1)) { 961 SignatureIterator::iterate(); // Must be too many arguments 962 } else { 963 _return_type = (BasicType)((fingerprint >> static_feature_size) & 964 result_feature_mask); 965 966 assert(fingerprint, "Fingerprint should not be 0"); 967 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 968 while ( 1 ) { 969 switch ( fingerprint & parameter_feature_mask ) { 970 case bool_parm: 971 get_bool(); 972 break; 973 case char_parm: 974 get_char(); 975 break; 976 case short_parm: 977 get_short(); 978 break; 979 case byte_parm: 980 get_byte(); 981 break; 982 case int_parm: 983 get_int(); 984 break; 985 case obj_parm: 986 get_object(); 987 break; 988 case long_parm: 989 get_long(); 990 break; 991 case float_parm: 992 get_float(); 993 break; 994 case double_parm: 995 get_double(); 996 break; 997 case done_parm: 998 return; 999 break; 1000 default: 1001 ShouldNotReachHere(); 1002 break; 1003 } 1004 fingerprint >>= parameter_feature_size; 1005 } 1006 } 1007 } 1008 }; 1009 1010 1011 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1012 protected: 1013 const jvalue *_ap; 1014 1015 inline void get_bool() { 1016 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1017 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1018 // TemplateInterpreterGenerator::generate_result_handler_for and 1019 // SharedRuntime::generate_native_wrapper. 1020 jboolean b = (_ap++)->z; 1021 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1022 } 1023 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1024 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1025 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1026 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1027 1028 inline void get_long() { _arguments->push_long((_ap++)->j); } 1029 inline void get_float() { _arguments->push_float((_ap++)->f); } 1030 inline void get_double() { _arguments->push_double((_ap++)->d);} 1031 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1032 1033 inline void set_ap(const jvalue *rap) { _ap = rap; } 1034 1035 public: 1036 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1037 : JNI_ArgumentPusher(signature) { 1038 set_ap(rap); 1039 } 1040 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1041 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1042 set_ap(rap); 1043 } 1044 1045 // Optimized path if we have the bitvector form of signature 1046 void iterate( uint64_t fingerprint ) { 1047 if (fingerprint == (uint64_t)CONST64(-1)) { 1048 SignatureIterator::iterate(); // Must be too many arguments 1049 } else { 1050 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1051 result_feature_mask); 1052 assert(fingerprint, "Fingerprint should not be 0"); 1053 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1054 while ( 1 ) { 1055 switch ( fingerprint & parameter_feature_mask ) { 1056 case bool_parm: 1057 get_bool(); 1058 break; 1059 case char_parm: 1060 get_char(); 1061 break; 1062 case short_parm: 1063 get_short(); 1064 break; 1065 case byte_parm: 1066 get_byte(); 1067 break; 1068 case int_parm: 1069 get_int(); 1070 break; 1071 case obj_parm: 1072 get_object(); 1073 break; 1074 case long_parm: 1075 get_long(); 1076 break; 1077 case float_parm: 1078 get_float(); 1079 break; 1080 case double_parm: 1081 get_double(); 1082 break; 1083 case done_parm: 1084 return; 1085 break; 1086 default: 1087 ShouldNotReachHere(); 1088 break; 1089 } 1090 fingerprint >>= parameter_feature_size; 1091 } 1092 } 1093 } 1094 }; 1095 1096 1097 enum JNICallType { 1098 JNI_STATIC, 1099 JNI_VIRTUAL, 1100 JNI_NONVIRTUAL 1101 }; 1102 1103 1104 1105 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1106 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1107 1108 // Create object to hold arguments for the JavaCall, and associate it with 1109 // the jni parser 1110 ResourceMark rm(THREAD); 1111 int number_of_parameters = method->size_of_parameters(); 1112 JavaCallArguments java_args(number_of_parameters); 1113 args->set_java_argument_object(&java_args); 1114 1115 assert(method->is_static(), "method should be static"); 1116 1117 // Fill out JavaCallArguments object 1118 args->iterate( Fingerprinter(method).fingerprint() ); 1119 // Initialize result type 1120 result->set_type(args->get_ret_type()); 1121 1122 // Invoke the method. Result is returned as oop. 1123 JavaCalls::call(result, method, &java_args, CHECK); 1124 1125 // Convert result 1126 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1127 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1128 } 1129 } 1130 1131 1132 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1133 oop recv = JNIHandles::resolve(receiver); 1134 if (recv == NULL) { 1135 THROW(vmSymbols::java_lang_NullPointerException()); 1136 } 1137 Handle h_recv(THREAD, recv); 1138 1139 int number_of_parameters; 1140 Method* selected_method; 1141 { 1142 Method* m = Method::resolve_jmethod_id(method_id); 1143 number_of_parameters = m->size_of_parameters(); 1144 Klass* holder = m->method_holder(); 1145 if (call_type != JNI_VIRTUAL) { 1146 selected_method = m; 1147 } else if (!m->has_itable_index()) { 1148 // non-interface call -- for that little speed boost, don't handlize 1149 debug_only(NoSafepointVerifier nosafepoint;) 1150 // jni_GetMethodID makes sure class is linked and initialized 1151 // so m should have a valid vtable index. 1152 assert(m->valid_vtable_index(), "no valid vtable index"); 1153 int vtbl_index = m->vtable_index(); 1154 if (vtbl_index != Method::nonvirtual_vtable_index) { 1155 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1156 } else { 1157 // final method 1158 selected_method = m; 1159 } 1160 } else { 1161 // interface call 1162 int itbl_index = m->itable_index(); 1163 Klass* k = h_recv->klass(); 1164 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1165 } 1166 } 1167 1168 methodHandle method(THREAD, selected_method); 1169 1170 // Create object to hold arguments for the JavaCall, and associate it with 1171 // the jni parser 1172 ResourceMark rm(THREAD); 1173 JavaCallArguments java_args(number_of_parameters); 1174 args->set_java_argument_object(&java_args); 1175 1176 // handle arguments 1177 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1178 args->push_receiver(h_recv); // Push jobject handle 1179 1180 // Fill out JavaCallArguments object 1181 args->iterate( Fingerprinter(method).fingerprint() ); 1182 // Initialize result type 1183 result->set_type(args->get_ret_type()); 1184 1185 // Invoke the method. Result is returned as oop. 1186 JavaCalls::call(result, method, &java_args, CHECK); 1187 1188 // Convert result 1189 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1190 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1191 } 1192 } 1193 1194 1195 static instanceOop alloc_object(jclass clazz, TRAPS) { 1196 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1197 if (k == NULL) { 1198 ResourceMark rm(THREAD); 1199 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1200 } 1201 k->check_valid_for_instantiation(false, CHECK_NULL); 1202 k->initialize(CHECK_NULL); 1203 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1204 return ih; 1205 } 1206 1207 DT_RETURN_MARK_DECL(AllocObject, jobject 1208 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1209 1210 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1211 JNIWrapper("AllocObject"); 1212 1213 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1214 1215 jobject ret = NULL; 1216 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1217 1218 instanceOop i = alloc_object(clazz, CHECK_NULL); 1219 ret = JNIHandles::make_local(env, i); 1220 return ret; 1221 JNI_END 1222 1223 DT_RETURN_MARK_DECL(NewObjectA, jobject 1224 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1225 1226 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1227 JNIWrapper("NewObjectA"); 1228 1229 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1230 1231 jobject obj = NULL; 1232 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1233 1234 instanceOop i = alloc_object(clazz, CHECK_NULL); 1235 obj = JNIHandles::make_local(env, i); 1236 JavaValue jvalue(T_VOID); 1237 JNI_ArgumentPusherArray ap(methodID, args); 1238 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1239 return obj; 1240 JNI_END 1241 1242 1243 DT_RETURN_MARK_DECL(NewObjectV, jobject 1244 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1245 1246 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1247 JNIWrapper("NewObjectV"); 1248 1249 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1250 1251 jobject obj = NULL; 1252 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1253 1254 instanceOop i = alloc_object(clazz, CHECK_NULL); 1255 obj = JNIHandles::make_local(env, i); 1256 JavaValue jvalue(T_VOID); 1257 JNI_ArgumentPusherVaArg ap(methodID, args); 1258 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1259 return obj; 1260 JNI_END 1261 1262 1263 DT_RETURN_MARK_DECL(NewObject, jobject 1264 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1265 1266 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1267 JNIWrapper("NewObject"); 1268 1269 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1270 1271 jobject obj = NULL; 1272 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1273 1274 instanceOop i = alloc_object(clazz, CHECK_NULL); 1275 obj = JNIHandles::make_local(env, i); 1276 va_list args; 1277 va_start(args, methodID); 1278 JavaValue jvalue(T_VOID); 1279 JNI_ArgumentPusherVaArg ap(methodID, args); 1280 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1281 va_end(args); 1282 return obj; 1283 JNI_END 1284 1285 1286 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1287 JNIWrapper("GetObjectClass"); 1288 1289 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1290 1291 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1292 jclass ret = 1293 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1294 1295 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1296 return ret; 1297 JNI_END 1298 1299 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1300 JNIWrapper("IsInstanceOf"); 1301 1302 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1303 1304 jboolean ret = JNI_TRUE; 1305 if (obj != NULL) { 1306 ret = JNI_FALSE; 1307 Klass* k = java_lang_Class::as_Klass( 1308 JNIHandles::resolve_non_null(clazz)); 1309 if (k != NULL) { 1310 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1311 } 1312 } 1313 1314 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1315 return ret; 1316 JNI_END 1317 1318 1319 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1320 const char *sig, bool is_static, TRAPS) { 1321 // %%%% This code should probably just call into a method in the LinkResolver 1322 // 1323 // The class should have been loaded (we have an instance of the class 1324 // passed in) so the method and signature should already be in the symbol 1325 // table. If they're not there, the method doesn't exist. 1326 const char *name_to_probe = (name_str == NULL) 1327 ? vmSymbols::object_initializer_name()->as_C_string() 1328 : name_str; 1329 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1330 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1331 1332 if (name == NULL || signature == NULL) { 1333 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1334 } 1335 1336 // Throw a NoSuchMethodError exception if we have an instance of a 1337 // primitive java.lang.Class 1338 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1339 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1340 } 1341 1342 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1343 1344 // Make sure class is linked and initialized before handing id's out to 1345 // Method*s. 1346 klass->initialize(CHECK_NULL); 1347 1348 Method* m; 1349 if (name == vmSymbols::object_initializer_name() || 1350 name == vmSymbols::class_initializer_name()) { 1351 // Never search superclasses for constructors 1352 if (klass->is_instance_klass()) { 1353 m = InstanceKlass::cast(klass)->find_method(name, signature); 1354 } else { 1355 m = NULL; 1356 } 1357 } else { 1358 m = klass->lookup_method(name, signature); 1359 if (m == NULL && klass->is_instance_klass()) { 1360 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1361 } 1362 } 1363 if (m == NULL || (m->is_static() != is_static)) { 1364 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1365 } 1366 return m->jmethod_id(); 1367 } 1368 1369 1370 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1371 const char *name, const char *sig)) 1372 JNIWrapper("GetMethodID"); 1373 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1374 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1375 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1376 return ret; 1377 JNI_END 1378 1379 1380 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1381 const char *name, const char *sig)) 1382 JNIWrapper("GetStaticMethodID"); 1383 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1384 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1385 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1386 return ret; 1387 JNI_END 1388 1389 1390 1391 // 1392 // Calling Methods 1393 // 1394 1395 1396 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1397 , EntryProbe, ReturnProbe) \ 1398 \ 1399 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1400 , ReturnProbe); \ 1401 \ 1402 JNI_ENTRY(ResultType, \ 1403 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1404 JNIWrapper("Call" XSTR(Result) "Method"); \ 1405 \ 1406 EntryProbe; \ 1407 ResultType ret = 0;\ 1408 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1409 (const ResultType&)ret);\ 1410 \ 1411 va_list args; \ 1412 va_start(args, methodID); \ 1413 JavaValue jvalue(Tag); \ 1414 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1416 va_end(args); \ 1417 ret = jvalue.get_##ResultType(); \ 1418 return ret;\ 1419 JNI_END 1420 1421 // the runtime type of subword integral basic types is integer 1422 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1423 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1425 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1426 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1428 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1429 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1431 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1432 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1434 1435 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1436 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1438 DEFINE_CALLMETHOD(jint, Int, T_INT, 1439 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1441 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1442 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1443 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1444 // Float and double probes don't return value because dtrace doesn't currently support it 1445 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1446 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1447 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1448 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1449 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1450 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1451 1452 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1453 , EntryProbe, ReturnProbe) \ 1454 \ 1455 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1456 , ReturnProbe); \ 1457 \ 1458 JNI_ENTRY(ResultType, \ 1459 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1460 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1461 \ 1462 EntryProbe;\ 1463 ResultType ret = 0;\ 1464 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1465 (const ResultType&)ret);\ 1466 \ 1467 JavaValue jvalue(Tag); \ 1468 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1470 ret = jvalue.get_##ResultType(); \ 1471 return ret;\ 1472 JNI_END 1473 1474 // the runtime type of subword integral basic types is integer 1475 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1476 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1478 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1479 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1481 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1482 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1484 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1485 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1487 1488 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1489 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1491 DEFINE_CALLMETHODV(jint, Int, T_INT, 1492 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1494 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1495 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1496 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1497 // Float and double probes don't return value because dtrace doesn't currently support it 1498 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1499 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1500 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1501 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1502 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1503 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1504 1505 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1506 , EntryProbe, ReturnProbe) \ 1507 \ 1508 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1509 , ReturnProbe); \ 1510 \ 1511 JNI_ENTRY(ResultType, \ 1512 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1513 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1514 EntryProbe; \ 1515 ResultType ret = 0;\ 1516 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1517 (const ResultType&)ret);\ 1518 \ 1519 JavaValue jvalue(Tag); \ 1520 JNI_ArgumentPusherArray ap(methodID, args); \ 1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1522 ret = jvalue.get_##ResultType(); \ 1523 return ret;\ 1524 JNI_END 1525 1526 // the runtime type of subword integral basic types is integer 1527 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1528 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1530 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1531 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1533 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1534 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1536 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1537 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1539 1540 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1541 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1543 DEFINE_CALLMETHODA(jint, Int, T_INT, 1544 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1546 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1547 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1548 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1549 // Float and double probes don't return value because dtrace doesn't currently support it 1550 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1551 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1552 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1553 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1554 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1555 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1556 1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1560 1561 1562 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1563 JNIWrapper("CallVoidMethod"); 1564 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1565 DT_VOID_RETURN_MARK(CallVoidMethod); 1566 1567 va_list args; 1568 va_start(args, methodID); 1569 JavaValue jvalue(T_VOID); 1570 JNI_ArgumentPusherVaArg ap(methodID, args); 1571 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1572 va_end(args); 1573 JNI_END 1574 1575 1576 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1577 JNIWrapper("CallVoidMethodV"); 1578 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1579 DT_VOID_RETURN_MARK(CallVoidMethodV); 1580 1581 JavaValue jvalue(T_VOID); 1582 JNI_ArgumentPusherVaArg ap(methodID, args); 1583 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1584 JNI_END 1585 1586 1587 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1588 JNIWrapper("CallVoidMethodA"); 1589 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1590 DT_VOID_RETURN_MARK(CallVoidMethodA); 1591 1592 JavaValue jvalue(T_VOID); 1593 JNI_ArgumentPusherArray ap(methodID, args); 1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1595 JNI_END 1596 1597 1598 1599 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1600 , EntryProbe, ReturnProbe) \ 1601 \ 1602 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1603 , ReturnProbe);\ 1604 \ 1605 JNI_ENTRY(ResultType, \ 1606 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1607 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1608 \ 1609 EntryProbe;\ 1610 ResultType ret;\ 1611 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1612 (const ResultType&)ret);\ 1613 \ 1614 va_list args; \ 1615 va_start(args, methodID); \ 1616 JavaValue jvalue(Tag); \ 1617 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1619 va_end(args); \ 1620 ret = jvalue.get_##ResultType(); \ 1621 return ret;\ 1622 JNI_END 1623 1624 // the runtime type of subword integral basic types is integer 1625 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1626 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1627 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1628 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1629 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1631 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1632 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1634 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1635 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1637 1638 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1639 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1641 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1642 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1644 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1645 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1646 // Float and double probes don't return value because dtrace doesn't currently support it 1647 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1648 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1649 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1650 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1651 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1652 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1653 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1654 1655 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1656 , EntryProbe, ReturnProbe) \ 1657 \ 1658 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1659 , ReturnProbe);\ 1660 \ 1661 JNI_ENTRY(ResultType, \ 1662 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1663 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1664 \ 1665 EntryProbe;\ 1666 ResultType ret;\ 1667 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1668 (const ResultType&)ret);\ 1669 \ 1670 JavaValue jvalue(Tag); \ 1671 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1672 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1673 ret = jvalue.get_##ResultType(); \ 1674 return ret;\ 1675 JNI_END 1676 1677 // the runtime type of subword integral basic types is integer 1678 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1679 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1680 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1681 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1682 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1684 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1685 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1687 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1688 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1690 1691 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1692 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1694 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1695 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1697 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1698 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1699 // Float and double probes don't return value because dtrace doesn't currently support it 1700 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1701 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1702 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1703 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1704 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1705 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1706 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1707 1708 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1709 , EntryProbe, ReturnProbe) \ 1710 \ 1711 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1712 , ReturnProbe);\ 1713 \ 1714 JNI_ENTRY(ResultType, \ 1715 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1716 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1717 \ 1718 EntryProbe;\ 1719 ResultType ret;\ 1720 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1721 (const ResultType&)ret);\ 1722 \ 1723 JavaValue jvalue(Tag); \ 1724 JNI_ArgumentPusherArray ap(methodID, args); \ 1725 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1726 ret = jvalue.get_##ResultType(); \ 1727 return ret;\ 1728 JNI_END 1729 1730 // the runtime type of subword integral basic types is integer 1731 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1732 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1734 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1735 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1737 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1738 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1740 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1741 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1743 1744 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1745 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1747 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1748 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1750 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1751 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1752 // Float and double probes don't return value because dtrace doesn't currently support it 1753 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1754 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1755 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1756 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1757 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1758 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1759 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1760 1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1767 1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1769 JNIWrapper("CallNonvirtualVoidMethod"); 1770 1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1773 1774 va_list args; 1775 va_start(args, methodID); 1776 JavaValue jvalue(T_VOID); 1777 JNI_ArgumentPusherVaArg ap(methodID, args); 1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1779 va_end(args); 1780 JNI_END 1781 1782 1783 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1784 JNIWrapper("CallNonvirtualVoidMethodV"); 1785 1786 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1787 env, obj, cls, (uintptr_t) methodID); 1788 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1789 1790 JavaValue jvalue(T_VOID); 1791 JNI_ArgumentPusherVaArg ap(methodID, args); 1792 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1793 JNI_END 1794 1795 1796 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1797 JNIWrapper("CallNonvirtualVoidMethodA"); 1798 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1799 env, obj, cls, (uintptr_t) methodID); 1800 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1801 JavaValue jvalue(T_VOID); 1802 JNI_ArgumentPusherArray ap(methodID, args); 1803 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1804 JNI_END 1805 1806 1807 1808 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1809 , EntryProbe, ResultProbe) \ 1810 \ 1811 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1812 , ResultProbe); \ 1813 \ 1814 JNI_ENTRY(ResultType, \ 1815 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1816 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1817 \ 1818 EntryProbe; \ 1819 ResultType ret = 0;\ 1820 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1821 (const ResultType&)ret);\ 1822 \ 1823 va_list args; \ 1824 va_start(args, methodID); \ 1825 JavaValue jvalue(Tag); \ 1826 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1827 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1828 va_end(args); \ 1829 ret = jvalue.get_##ResultType(); \ 1830 return ret;\ 1831 JNI_END 1832 1833 // the runtime type of subword integral basic types is integer 1834 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1835 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1836 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1837 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1838 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1840 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1841 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1843 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1844 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1846 1847 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1848 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1850 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1851 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1853 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1854 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1855 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1856 // Float and double probes don't return value because dtrace doesn't currently support it 1857 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1858 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1859 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1860 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1861 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1862 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1863 1864 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1865 , EntryProbe, ResultProbe) \ 1866 \ 1867 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1868 , ResultProbe); \ 1869 \ 1870 JNI_ENTRY(ResultType, \ 1871 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1872 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1873 \ 1874 EntryProbe; \ 1875 ResultType ret = 0;\ 1876 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1877 (const ResultType&)ret);\ 1878 \ 1879 JavaValue jvalue(Tag); \ 1880 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1881 /* Make sure class is initialized before trying to invoke its method */ \ 1882 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1883 k->initialize(CHECK_0); \ 1884 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1885 va_end(args); \ 1886 ret = jvalue.get_##ResultType(); \ 1887 return ret;\ 1888 JNI_END 1889 1890 // the runtime type of subword integral basic types is integer 1891 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1892 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1893 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1894 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1895 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1897 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1898 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1900 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1901 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1903 1904 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1905 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1907 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1908 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1910 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1911 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1912 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1913 // Float and double probes don't return value because dtrace doesn't currently support it 1914 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1915 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1916 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1917 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1918 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1919 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1920 1921 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1922 , EntryProbe, ResultProbe) \ 1923 \ 1924 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1925 , ResultProbe); \ 1926 \ 1927 JNI_ENTRY(ResultType, \ 1928 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1929 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1930 \ 1931 EntryProbe; \ 1932 ResultType ret = 0;\ 1933 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1934 (const ResultType&)ret);\ 1935 \ 1936 JavaValue jvalue(Tag); \ 1937 JNI_ArgumentPusherArray ap(methodID, args); \ 1938 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1939 ret = jvalue.get_##ResultType(); \ 1940 return ret;\ 1941 JNI_END 1942 1943 // the runtime type of subword integral basic types is integer 1944 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1945 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1946 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1947 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1948 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1950 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1951 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1953 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1954 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1956 1957 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1958 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1960 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1961 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1963 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1964 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1965 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1966 // Float and double probes don't return value because dtrace doesn't currently support it 1967 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1968 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1969 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1970 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1971 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1972 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1973 1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1980 1981 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1982 JNIWrapper("CallStaticVoidMethod"); 1983 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1984 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1985 1986 va_list args; 1987 va_start(args, methodID); 1988 JavaValue jvalue(T_VOID); 1989 JNI_ArgumentPusherVaArg ap(methodID, args); 1990 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1991 va_end(args); 1992 JNI_END 1993 1994 1995 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1996 JNIWrapper("CallStaticVoidMethodV"); 1997 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1998 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1999 2000 JavaValue jvalue(T_VOID); 2001 JNI_ArgumentPusherVaArg ap(methodID, args); 2002 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2003 JNI_END 2004 2005 2006 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2007 JNIWrapper("CallStaticVoidMethodA"); 2008 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2009 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2010 2011 JavaValue jvalue(T_VOID); 2012 JNI_ArgumentPusherArray ap(methodID, args); 2013 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2014 JNI_END 2015 2016 2017 // 2018 // Accessing Fields 2019 // 2020 2021 2022 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2023 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2024 2025 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2026 const char *name, const char *sig)) 2027 JNIWrapper("GetFieldID"); 2028 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2029 jfieldID ret = 0; 2030 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2031 2032 // The class should have been loaded (we have an instance of the class 2033 // passed in) so the field and signature should already be in the symbol 2034 // table. If they're not there, the field doesn't exist. 2035 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2036 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2037 if (fieldname == NULL || signame == NULL) { 2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2039 } 2040 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2041 // Make sure class is initialized before handing id's out to fields 2042 k->initialize(CHECK_NULL); 2043 2044 fieldDescriptor fd; 2045 if (!k->is_instance_klass() || 2046 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2047 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2048 } 2049 2050 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2051 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2052 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2053 return ret; 2054 JNI_END 2055 2056 2057 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2058 JNIWrapper("GetObjectField"); 2059 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2060 oop o = JNIHandles::resolve_non_null(obj); 2061 Klass* k = o->klass(); 2062 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2063 // Keep JVMTI addition small and only check enabled flag here. 2064 // jni_GetField_probe() assumes that is okay to create handles. 2065 if (JvmtiExport::should_post_field_access()) { 2066 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2067 } 2068 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 2069 jobject ret = JNIHandles::make_local(env, loaded_obj); 2070 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2071 return ret; 2072 JNI_END 2073 2074 2075 2076 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2077 , EntryProbe, ReturnProbe) \ 2078 \ 2079 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2080 , ReturnProbe); \ 2081 \ 2082 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2083 JNIWrapper("Get" XSTR(Result) "Field"); \ 2084 \ 2085 EntryProbe; \ 2086 Return ret = 0;\ 2087 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2088 \ 2089 oop o = JNIHandles::resolve_non_null(obj); \ 2090 Klass* k = o->klass(); \ 2091 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2092 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2093 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2094 /* and creates a ResetNoHandleMark. */ \ 2095 if (JvmtiExport::should_post_field_access()) { \ 2096 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2097 } \ 2098 ret = o->Fieldname##_field(offset); \ 2099 return ret; \ 2100 JNI_END 2101 2102 DEFINE_GETFIELD(jboolean, bool, Boolean 2103 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2104 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2105 DEFINE_GETFIELD(jbyte, byte, Byte 2106 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2107 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2108 DEFINE_GETFIELD(jchar, char, Char 2109 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2110 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2111 DEFINE_GETFIELD(jshort, short, Short 2112 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2113 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2114 DEFINE_GETFIELD(jint, int, Int 2115 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2116 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2117 DEFINE_GETFIELD(jlong, long, Long 2118 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2119 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2120 // Float and double probes don't return value because dtrace doesn't currently support it 2121 DEFINE_GETFIELD(jfloat, float, Float 2122 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2123 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2124 DEFINE_GETFIELD(jdouble, double, Double 2125 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2126 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2127 2128 address jni_GetBooleanField_addr() { 2129 return (address)jni_GetBooleanField; 2130 } 2131 address jni_GetByteField_addr() { 2132 return (address)jni_GetByteField; 2133 } 2134 address jni_GetCharField_addr() { 2135 return (address)jni_GetCharField; 2136 } 2137 address jni_GetShortField_addr() { 2138 return (address)jni_GetShortField; 2139 } 2140 address jni_GetIntField_addr() { 2141 return (address)jni_GetIntField; 2142 } 2143 address jni_GetLongField_addr() { 2144 return (address)jni_GetLongField; 2145 } 2146 address jni_GetFloatField_addr() { 2147 return (address)jni_GetFloatField; 2148 } 2149 address jni_GetDoubleField_addr() { 2150 return (address)jni_GetDoubleField; 2151 } 2152 2153 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2154 JNIWrapper("SetObjectField"); 2155 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2156 oop o = JNIHandles::resolve_non_null(obj); 2157 Klass* k = o->klass(); 2158 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2159 // Keep JVMTI addition small and only check enabled flag here. 2160 // jni_SetField_probe_nh() assumes that is not okay to create handles 2161 // and creates a ResetNoHandleMark. 2162 if (JvmtiExport::should_post_field_modification()) { 2163 jvalue field_value; 2164 field_value.l = value; 2165 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2166 } 2167 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2168 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2169 JNI_END 2170 2171 2172 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2173 , EntryProbe, ReturnProbe) \ 2174 \ 2175 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2176 JNIWrapper("Set" XSTR(Result) "Field"); \ 2177 \ 2178 EntryProbe; \ 2179 \ 2180 oop o = JNIHandles::resolve_non_null(obj); \ 2181 Klass* k = o->klass(); \ 2182 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2183 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2184 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2185 /* and creates a ResetNoHandleMark. */ \ 2186 if (JvmtiExport::should_post_field_modification()) { \ 2187 jvalue field_value; \ 2188 field_value.unionType = value; \ 2189 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2190 } \ 2191 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2192 o->Fieldname##_field_put(offset, value); \ 2193 ReturnProbe; \ 2194 JNI_END 2195 2196 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2197 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2198 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2199 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2200 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2201 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2202 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2203 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2204 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2205 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2206 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2207 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2208 DEFINE_SETFIELD(jint, int, Int, 'I', i 2209 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2210 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2211 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2212 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2213 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2214 // Float and double probes don't return value because dtrace doesn't currently support it 2215 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2216 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2217 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2218 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2219 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2220 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2221 2222 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2223 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2224 2225 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2226 JNIWrapper("ToReflectedField"); 2227 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2228 jobject ret = NULL; 2229 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2230 2231 fieldDescriptor fd; 2232 bool found = false; 2233 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2234 2235 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2236 2237 if (isStatic) { 2238 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2239 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2240 assert(id->is_static_field_id(), "invalid static field id"); 2241 found = id->find_local_field(&fd); 2242 } else { 2243 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2244 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2245 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2246 } 2247 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2248 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2249 ret = JNIHandles::make_local(env, reflected); 2250 return ret; 2251 JNI_END 2252 2253 2254 // 2255 // Accessing Static Fields 2256 // 2257 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2258 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2259 2260 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2261 const char *name, const char *sig)) 2262 JNIWrapper("GetStaticFieldID"); 2263 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2264 jfieldID ret = NULL; 2265 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2266 2267 // The class should have been loaded (we have an instance of the class 2268 // passed in) so the field and signature should already be in the symbol 2269 // table. If they're not there, the field doesn't exist. 2270 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2271 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2272 if (fieldname == NULL || signame == NULL) { 2273 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2274 } 2275 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2276 // Make sure class is initialized before handing id's out to static fields 2277 k->initialize(CHECK_NULL); 2278 2279 fieldDescriptor fd; 2280 if (!k->is_instance_klass() || 2281 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2282 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2283 } 2284 2285 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2286 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2287 debug_only(id->set_is_static_field_id();) 2288 2289 debug_only(id->verify(fd.field_holder())); 2290 2291 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2292 return ret; 2293 JNI_END 2294 2295 2296 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2297 JNIWrapper("GetStaticObjectField"); 2298 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2299 #if INCLUDE_JNI_CHECK 2300 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2301 #endif // INCLUDE_JNI_CHECK 2302 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2303 assert(id->is_static_field_id(), "invalid static field id"); 2304 // Keep JVMTI addition small and only check enabled flag here. 2305 // jni_GetField_probe() assumes that is okay to create handles. 2306 if (JvmtiExport::should_post_field_access()) { 2307 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2308 } 2309 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2310 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2311 return ret; 2312 JNI_END 2313 2314 2315 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2316 , EntryProbe, ReturnProbe) \ 2317 \ 2318 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2319 , ReturnProbe); \ 2320 \ 2321 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2322 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2323 EntryProbe; \ 2324 Return ret = 0;\ 2325 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2326 (const Return&)ret);\ 2327 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2328 assert(id->is_static_field_id(), "invalid static field id"); \ 2329 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2330 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2331 if (JvmtiExport::should_post_field_access()) { \ 2332 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2333 } \ 2334 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2335 return ret;\ 2336 JNI_END 2337 2338 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2339 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2340 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2341 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2342 DEFINE_GETSTATICFIELD(jchar, char, Char 2343 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2344 DEFINE_GETSTATICFIELD(jshort, short, Short 2345 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2346 DEFINE_GETSTATICFIELD(jint, int, Int 2347 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2348 DEFINE_GETSTATICFIELD(jlong, long, Long 2349 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2350 // Float and double probes don't return value because dtrace doesn't currently support it 2351 DEFINE_GETSTATICFIELD(jfloat, float, Float 2352 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2353 DEFINE_GETSTATICFIELD(jdouble, double, Double 2354 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2355 2356 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2357 JNIWrapper("SetStaticObjectField"); 2358 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2359 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2360 assert(id->is_static_field_id(), "invalid static field id"); 2361 // Keep JVMTI addition small and only check enabled flag here. 2362 // jni_SetField_probe() assumes that is okay to create handles. 2363 if (JvmtiExport::should_post_field_modification()) { 2364 jvalue field_value; 2365 field_value.l = value; 2366 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2367 } 2368 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2369 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2370 JNI_END 2371 2372 2373 2374 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2375 , EntryProbe, ReturnProbe) \ 2376 \ 2377 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2378 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2379 EntryProbe; \ 2380 \ 2381 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2382 assert(id->is_static_field_id(), "invalid static field id"); \ 2383 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2384 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2385 if (JvmtiExport::should_post_field_modification()) { \ 2386 jvalue field_value; \ 2387 field_value.unionType = value; \ 2388 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2389 } \ 2390 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2391 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2392 ReturnProbe;\ 2393 JNI_END 2394 2395 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2396 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2397 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2398 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2399 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2400 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2401 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2402 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2403 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2404 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2405 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2406 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2407 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2408 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2409 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2410 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2411 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2412 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2413 // Float and double probes don't return value because dtrace doesn't currently support it 2414 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2415 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2416 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2417 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2418 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2419 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2420 2421 // 2422 // String Operations 2423 // 2424 2425 // Unicode Interface 2426 2427 DT_RETURN_MARK_DECL(NewString, jstring 2428 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2429 2430 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2431 JNIWrapper("NewString"); 2432 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2433 jstring ret = NULL; 2434 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2435 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2436 ret = (jstring) JNIHandles::make_local(env, string); 2437 return ret; 2438 JNI_END 2439 2440 2441 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2442 JNIWrapper("GetStringLength"); 2443 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2444 jsize ret = 0; 2445 oop s = JNIHandles::resolve_non_null(string); 2446 if (java_lang_String::value(s) != NULL) { 2447 ret = java_lang_String::length(s); 2448 } 2449 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2450 return ret; 2451 JNI_END 2452 2453 2454 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2455 JNIEnv *env, jstring string, jboolean *isCopy)) 2456 JNIWrapper("GetStringChars"); 2457 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2458 jchar* buf = NULL; 2459 oop s = JNIHandles::resolve_non_null(string); 2460 typeArrayOop s_value = java_lang_String::value(s); 2461 if (s_value != NULL) { 2462 int s_len = java_lang_String::length(s); 2463 bool is_latin1 = java_lang_String::is_latin1(s); 2464 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2465 /* JNI Specification states return NULL on OOM */ 2466 if (buf != NULL) { 2467 if (s_len > 0) { 2468 if (!is_latin1) { 2469 ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0), 2470 buf, s_len); 2471 } else { 2472 for (int i = 0; i < s_len; i++) { 2473 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2474 } 2475 } 2476 } 2477 buf[s_len] = 0; 2478 //%note jni_5 2479 if (isCopy != NULL) { 2480 *isCopy = JNI_TRUE; 2481 } 2482 } 2483 } 2484 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2485 return buf; 2486 JNI_END 2487 2488 2489 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2490 JNIWrapper("ReleaseStringChars"); 2491 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2492 //%note jni_6 2493 if (chars != NULL) { 2494 // Since String objects are supposed to be immutable, don't copy any 2495 // new data back. A bad user will have to go after the char array. 2496 FreeHeap((void*) chars); 2497 } 2498 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2499 JNI_END 2500 2501 2502 // UTF Interface 2503 2504 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2505 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2506 2507 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2508 JNIWrapper("NewStringUTF"); 2509 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2510 jstring ret; 2511 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2512 2513 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2514 ret = (jstring) JNIHandles::make_local(env, result); 2515 return ret; 2516 JNI_END 2517 2518 2519 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2520 JNIWrapper("GetStringUTFLength"); 2521 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2522 jsize ret = 0; 2523 oop java_string = JNIHandles::resolve_non_null(string); 2524 if (java_lang_String::value(java_string) != NULL) { 2525 ret = java_lang_String::utf8_length(java_string); 2526 } 2527 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2528 return ret; 2529 JNI_END 2530 2531 2532 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2533 JNIWrapper("GetStringUTFChars"); 2534 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2535 char* result = NULL; 2536 oop java_string = JNIHandles::resolve_non_null(string); 2537 if (java_lang_String::value(java_string) != NULL) { 2538 size_t length = java_lang_String::utf8_length(java_string); 2539 /* JNI Specification states return NULL on OOM */ 2540 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2541 if (result != NULL) { 2542 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2543 if (isCopy != NULL) { 2544 *isCopy = JNI_TRUE; 2545 } 2546 } 2547 } 2548 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2549 return result; 2550 JNI_END 2551 2552 2553 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2554 JNIWrapper("ReleaseStringUTFChars"); 2555 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2556 if (chars != NULL) { 2557 FreeHeap((char*) chars); 2558 } 2559 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2560 JNI_END 2561 2562 2563 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2564 JNIWrapper("GetArrayLength"); 2565 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2566 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2567 assert(a->is_array(), "must be array"); 2568 jsize ret = a->length(); 2569 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2570 return ret; 2571 JNI_END 2572 2573 2574 // 2575 // Object Array Operations 2576 // 2577 2578 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2579 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2580 2581 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2582 JNIWrapper("NewObjectArray"); 2583 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2584 jobjectArray ret = NULL; 2585 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2586 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2587 Klass* ak = ek->array_klass(CHECK_NULL); 2588 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2589 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2590 oop initial_value = JNIHandles::resolve(initialElement); 2591 if (initial_value != NULL) { // array already initialized with NULL 2592 for (int index = 0; index < length; index++) { 2593 result->obj_at_put(index, initial_value); 2594 } 2595 } 2596 ret = (jobjectArray) JNIHandles::make_local(env, result); 2597 return ret; 2598 JNI_END 2599 2600 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2601 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2602 2603 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2604 JNIWrapper("GetObjectArrayElement"); 2605 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2606 jobject ret = NULL; 2607 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2608 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2609 if (a->is_within_bounds(index)) { 2610 ret = JNIHandles::make_local(env, a->obj_at(index)); 2611 return ret; 2612 } else { 2613 char buf[jintAsStringSize]; 2614 sprintf(buf, "%d", index); 2615 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2616 } 2617 JNI_END 2618 2619 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2620 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2621 2622 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2623 JNIWrapper("SetObjectArrayElement"); 2624 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2625 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2626 2627 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2628 oop v = JNIHandles::resolve(value); 2629 if (a->is_within_bounds(index)) { 2630 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2631 a->obj_at_put(index, v); 2632 } else { 2633 ResourceMark rm(THREAD); 2634 stringStream ss; 2635 Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass(); 2636 ss.print("type mismatch: can not store %s to %s[%d]", 2637 v->klass()->external_name(), 2638 bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(), 2639 index); 2640 for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) { 2641 ss.print("[]"); 2642 } 2643 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string()); 2644 } 2645 } else { 2646 char buf[jintAsStringSize]; 2647 sprintf(buf, "%d", index); 2648 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2649 } 2650 JNI_END 2651 2652 2653 2654 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2655 ,EntryProbe,ReturnProbe) \ 2656 \ 2657 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2658 , ReturnProbe); \ 2659 \ 2660 JNI_ENTRY(Return, \ 2661 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2662 JNIWrapper("New" XSTR(Result) "Array"); \ 2663 EntryProbe; \ 2664 Return ret = NULL;\ 2665 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2666 \ 2667 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2668 ret = (Return) JNIHandles::make_local(env, obj); \ 2669 return ret;\ 2670 JNI_END 2671 2672 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2673 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2674 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2675 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2676 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2677 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2678 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2679 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2680 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2681 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2682 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2683 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2684 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2685 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2686 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2687 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2688 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2689 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2690 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2691 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2692 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2693 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2694 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2695 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2696 2697 // Return an address which will fault if the caller writes to it. 2698 2699 static char* get_bad_address() { 2700 static char* bad_address = NULL; 2701 if (bad_address == NULL) { 2702 size_t size = os::vm_allocation_granularity(); 2703 bad_address = os::reserve_memory(size); 2704 if (bad_address != NULL) { 2705 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2706 /*is_committed*/false); 2707 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2708 } 2709 } 2710 return bad_address; 2711 } 2712 2713 2714 2715 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2716 , EntryProbe, ReturnProbe) \ 2717 \ 2718 JNI_QUICK_ENTRY(ElementType*, \ 2719 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2720 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2721 EntryProbe; \ 2722 /* allocate an chunk of memory in c land */ \ 2723 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2724 ElementType* result; \ 2725 int len = a->length(); \ 2726 if (len == 0) { \ 2727 /* Empty array: legal but useless, can't return NULL. \ 2728 * Return a pointer to something useless. \ 2729 * Avoid asserts in typeArrayOop. */ \ 2730 result = (ElementType*)get_bad_address(); \ 2731 } else { \ 2732 /* JNI Specification states return NULL on OOM */ \ 2733 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2734 if (result != NULL) { \ 2735 /* copy the array to the c chunk */ \ 2736 ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \ 2737 result, len); \ 2738 if (isCopy) { \ 2739 *isCopy = JNI_TRUE; \ 2740 } \ 2741 } \ 2742 } \ 2743 ReturnProbe; \ 2744 return result; \ 2745 JNI_END 2746 2747 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2748 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2749 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2750 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2751 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2752 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2753 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2754 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2755 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2756 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2757 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2758 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2759 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2760 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2761 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2762 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2763 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2764 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2765 // Float and double probes don't return value because dtrace doesn't currently support it 2766 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2767 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2768 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2769 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2770 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2771 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2772 2773 2774 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2775 , EntryProbe, ReturnProbe);\ 2776 \ 2777 JNI_QUICK_ENTRY(void, \ 2778 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2779 ElementType *buf, jint mode)) \ 2780 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2781 EntryProbe; \ 2782 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2783 int len = a->length(); \ 2784 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2785 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2786 ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \ 2787 } \ 2788 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2789 FreeHeap(buf); \ 2790 } \ 2791 } \ 2792 ReturnProbe; \ 2793 JNI_END 2794 2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2796 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2797 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2799 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2800 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2802 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2803 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2805 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2806 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2808 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2809 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2811 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2812 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2814 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2815 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2817 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2818 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2819 2820 2821 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2822 , EntryProbe, ReturnProbe); \ 2823 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2824 , ReturnProbe); \ 2825 \ 2826 JNI_ENTRY(void, \ 2827 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2828 jsize len, ElementType *buf)) \ 2829 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2830 EntryProbe; \ 2831 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2832 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2833 if (start < 0 || len < 0 || (start > src->length() - len)) { \ 2834 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2835 } else { \ 2836 if (len > 0) { \ 2837 ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \ 2838 } \ 2839 } \ 2840 JNI_END 2841 2842 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2843 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2844 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2845 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2846 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2847 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2848 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2849 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2850 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2851 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2852 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2853 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2854 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2855 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2856 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2857 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2858 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2859 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2860 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2861 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2862 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2863 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2864 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2865 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2866 2867 2868 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2869 , EntryProbe, ReturnProbe); \ 2870 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2871 ,ReturnProbe); \ 2872 \ 2873 JNI_ENTRY(void, \ 2874 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2875 jsize len, const ElementType *buf)) \ 2876 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2877 EntryProbe; \ 2878 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2879 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2880 if (start < 0 || len < 0 || (start > dst->length() - len)) { \ 2881 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2882 } else { \ 2883 if (len > 0) { \ 2884 ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \ 2885 } \ 2886 } \ 2887 JNI_END 2888 2889 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2890 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2891 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2892 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2893 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2894 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2895 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2896 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2897 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2898 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2899 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2900 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2901 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2902 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2903 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2904 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2905 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2906 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2907 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2908 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2909 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2910 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2911 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2912 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2913 2914 2915 // 2916 // Interception of natives 2917 // 2918 2919 // The RegisterNatives call being attempted tried to register with a method that 2920 // is not native. Ask JVM TI what prefixes have been specified. Then check 2921 // to see if the native method is now wrapped with the prefixes. See the 2922 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2923 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2924 #if INCLUDE_JVMTI 2925 ResourceMark rm(THREAD); 2926 Method* method; 2927 int name_len = name->utf8_length(); 2928 char* name_str = name->as_utf8(); 2929 int prefix_count; 2930 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2931 for (int i = 0; i < prefix_count; i++) { 2932 char* prefix = prefixes[i]; 2933 int prefix_len = (int)strlen(prefix); 2934 2935 // try adding this prefix to the method name and see if it matches another method name 2936 int trial_len = name_len + prefix_len; 2937 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2938 strcpy(trial_name_str, prefix); 2939 strcat(trial_name_str, name_str); 2940 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2941 if (trial_name == NULL) { 2942 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2943 } 2944 method = k->lookup_method(trial_name, signature); 2945 if (method == NULL) { 2946 continue; // signature doesn't match, try the next prefix 2947 } 2948 if (method->is_native()) { 2949 method->set_is_prefixed_native(); 2950 return method; // wahoo, we found a prefixed version of the method, return it 2951 } 2952 // found as non-native, so prefix is good, add it, probably just need more prefixes 2953 name_len = trial_len; 2954 name_str = trial_name_str; 2955 } 2956 #endif // INCLUDE_JVMTI 2957 return NULL; // not found 2958 } 2959 2960 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2961 Method* method = k->lookup_method(name, signature); 2962 if (method == NULL) { 2963 ResourceMark rm; 2964 stringStream st; 2965 st.print("Method %s name or signature does not match", 2966 Method::name_and_sig_as_C_string(k, name, signature)); 2967 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2968 } 2969 if (!method->is_native()) { 2970 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2971 method = find_prefixed_native(k, name, signature, THREAD); 2972 if (method == NULL) { 2973 ResourceMark rm; 2974 stringStream st; 2975 st.print("Method %s is not declared as native", 2976 Method::name_and_sig_as_C_string(k, name, signature)); 2977 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2978 } 2979 } 2980 2981 if (entry != NULL) { 2982 method->set_native_function(entry, 2983 Method::native_bind_event_is_interesting); 2984 } else { 2985 method->clear_native_function(); 2986 } 2987 if (PrintJNIResolving) { 2988 ResourceMark rm(THREAD); 2989 tty->print_cr("[Registering JNI native method %s.%s]", 2990 method->method_holder()->external_name(), 2991 method->name()->as_C_string()); 2992 } 2993 return true; 2994 } 2995 2996 DT_RETURN_MARK_DECL(RegisterNatives, jint 2997 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2998 2999 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3000 const JNINativeMethod *methods, 3001 jint nMethods)) 3002 JNIWrapper("RegisterNatives"); 3003 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3004 jint ret = 0; 3005 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3006 3007 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3008 3009 for (int index = 0; index < nMethods; index++) { 3010 const char* meth_name = methods[index].name; 3011 const char* meth_sig = methods[index].signature; 3012 int meth_name_len = (int)strlen(meth_name); 3013 3014 // The class should have been loaded (we have an instance of the class 3015 // passed in) so the method and signature should already be in the symbol 3016 // table. If they're not there, the method doesn't exist. 3017 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3018 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3019 3020 if (name == NULL || signature == NULL) { 3021 ResourceMark rm; 3022 stringStream st; 3023 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3024 // Must return negative value on failure 3025 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3026 } 3027 3028 bool res = register_native(k, name, signature, 3029 (address) methods[index].fnPtr, THREAD); 3030 if (!res) { 3031 ret = -1; 3032 break; 3033 } 3034 } 3035 return ret; 3036 JNI_END 3037 3038 3039 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3040 JNIWrapper("UnregisterNatives"); 3041 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3042 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3043 //%note jni_2 3044 if (k->is_instance_klass()) { 3045 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3046 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3047 if (m->is_native()) { 3048 m->clear_native_function(); 3049 m->set_signature_handler(NULL); 3050 } 3051 } 3052 } 3053 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3054 return 0; 3055 JNI_END 3056 3057 // 3058 // Monitor functions 3059 // 3060 3061 DT_RETURN_MARK_DECL(MonitorEnter, jint 3062 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3063 3064 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3065 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3066 jint ret = JNI_ERR; 3067 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3068 3069 // If the object is null, we can't do anything with it 3070 if (jobj == NULL) { 3071 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3072 } 3073 3074 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3075 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3076 ret = JNI_OK; 3077 return ret; 3078 JNI_END 3079 3080 DT_RETURN_MARK_DECL(MonitorExit, jint 3081 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3082 3083 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3084 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3085 jint ret = JNI_ERR; 3086 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3087 3088 // Don't do anything with a null object 3089 if (jobj == NULL) { 3090 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3091 } 3092 3093 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3094 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3095 3096 ret = JNI_OK; 3097 return ret; 3098 JNI_END 3099 3100 // 3101 // Extensions 3102 // 3103 3104 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3105 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3106 3107 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3108 JNIWrapper("GetStringRegion"); 3109 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3110 DT_VOID_RETURN_MARK(GetStringRegion); 3111 oop s = JNIHandles::resolve_non_null(string); 3112 int s_len = java_lang_String::length(s); 3113 if (start < 0 || len < 0 || start > s_len - len) { 3114 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3115 } else { 3116 if (len > 0) { 3117 typeArrayOop s_value = java_lang_String::value(s); 3118 bool is_latin1 = java_lang_String::is_latin1(s); 3119 if (!is_latin1) { 3120 ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start), 3121 buf, len); 3122 } else { 3123 for (int i = 0; i < len; i++) { 3124 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3125 } 3126 } 3127 } 3128 } 3129 JNI_END 3130 3131 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3132 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3133 3134 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3135 JNIWrapper("GetStringUTFRegion"); 3136 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3137 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3138 oop s = JNIHandles::resolve_non_null(string); 3139 int s_len = java_lang_String::length(s); 3140 if (start < 0 || len < 0 || start > s_len - len) { 3141 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3142 } else { 3143 //%note jni_7 3144 if (len > 0) { 3145 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3146 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3147 // as_utf8_string null-terminates the result string 3148 } else { 3149 // JDK null-terminates the buffer even in len is zero 3150 if (buf != NULL) { 3151 buf[0] = 0; 3152 } 3153 } 3154 } 3155 JNI_END 3156 3157 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) { 3158 if (Universe::heap()->supports_object_pinning()) { 3159 const oop o = JNIHandles::resolve_non_null(obj); 3160 return Universe::heap()->pin_object(thread, o); 3161 } else { 3162 GCLocker::lock_critical(thread); 3163 return JNIHandles::resolve_non_null(obj); 3164 } 3165 } 3166 3167 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) { 3168 if (Universe::heap()->supports_object_pinning()) { 3169 const oop o = JNIHandles::resolve_non_null(obj); 3170 return Universe::heap()->unpin_object(thread, o); 3171 } else { 3172 GCLocker::unlock_critical(thread); 3173 } 3174 } 3175 3176 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3177 JNIWrapper("GetPrimitiveArrayCritical"); 3178 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3179 if (isCopy != NULL) { 3180 *isCopy = JNI_FALSE; 3181 } 3182 oop a = lock_gc_or_pin_object(thread, array); 3183 assert(a->is_array(), "just checking"); 3184 BasicType type; 3185 if (a->is_objArray()) { 3186 type = T_OBJECT; 3187 } else { 3188 type = TypeArrayKlass::cast(a->klass())->element_type(); 3189 } 3190 void* ret = arrayOop(a)->base(type); 3191 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3192 return ret; 3193 JNI_END 3194 3195 3196 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3197 JNIWrapper("ReleasePrimitiveArrayCritical"); 3198 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3199 unlock_gc_or_unpin_object(thread, array); 3200 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3201 JNI_END 3202 3203 3204 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3205 JNIWrapper("GetStringCritical"); 3206 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3207 oop s = lock_gc_or_pin_object(thread, string); 3208 typeArrayOop s_value = java_lang_String::value(s); 3209 bool is_latin1 = java_lang_String::is_latin1(s); 3210 if (isCopy != NULL) { 3211 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3212 } 3213 jchar* ret; 3214 if (!is_latin1) { 3215 ret = (jchar*) s_value->base(T_CHAR); 3216 } else { 3217 // Inflate latin1 encoded string to UTF16 3218 int s_len = java_lang_String::length(s); 3219 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3220 /* JNI Specification states return NULL on OOM */ 3221 if (ret != NULL) { 3222 for (int i = 0; i < s_len; i++) { 3223 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3224 } 3225 ret[s_len] = 0; 3226 } 3227 } 3228 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3229 return ret; 3230 JNI_END 3231 3232 3233 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3234 JNIWrapper("ReleaseStringCritical"); 3235 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3236 // The str and chars arguments are ignored for UTF16 strings 3237 oop s = JNIHandles::resolve_non_null(str); 3238 bool is_latin1 = java_lang_String::is_latin1(s); 3239 if (is_latin1) { 3240 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3241 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3242 FREE_C_HEAP_ARRAY(jchar, chars); 3243 } 3244 unlock_gc_or_unpin_object(thread, str); 3245 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3246 JNI_END 3247 3248 3249 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3250 JNIWrapper("jni_NewWeakGlobalRef"); 3251 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3252 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3253 jweak ret = JNIHandles::make_weak_global(ref_handle); 3254 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3255 return ret; 3256 JNI_END 3257 3258 // Must be JNI_ENTRY (with HandleMark) 3259 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3260 JNIWrapper("jni_DeleteWeakGlobalRef"); 3261 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3262 JNIHandles::destroy_weak_global(ref); 3263 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3264 JNI_END 3265 3266 3267 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3268 JNIWrapper("jni_ExceptionCheck"); 3269 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3270 jni_check_async_exceptions(thread); 3271 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3272 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3273 return ret; 3274 JNI_END 3275 3276 3277 // Initialization state for three routines below relating to 3278 // java.nio.DirectBuffers 3279 static int directBufferSupportInitializeStarted = 0; 3280 static volatile int directBufferSupportInitializeEnded = 0; 3281 static volatile int directBufferSupportInitializeFailed = 0; 3282 static jclass bufferClass = NULL; 3283 static jclass directBufferClass = NULL; 3284 static jclass directByteBufferClass = NULL; 3285 static jmethodID directByteBufferConstructor = NULL; 3286 static jfieldID directBufferAddressField = NULL; 3287 static jfieldID bufferCapacityField = NULL; 3288 3289 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3290 Handle loader; // null (bootstrap) loader 3291 Handle protection_domain; // null protection domain 3292 3293 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3294 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3295 3296 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3297 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3298 } 3299 return result; 3300 } 3301 3302 // These lookups are done with the NULL (bootstrap) ClassLoader to 3303 // circumvent any security checks that would be done by jni_FindClass. 3304 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3305 { 3306 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3307 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3308 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3309 return true; 3310 } 3311 JNI_END 3312 3313 3314 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3315 if (directBufferSupportInitializeFailed) { 3316 return false; 3317 } 3318 3319 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3320 if (!lookupDirectBufferClasses(env)) { 3321 directBufferSupportInitializeFailed = 1; 3322 return false; 3323 } 3324 3325 // Make global references for these 3326 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3327 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3328 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3329 3330 // Get needed field and method IDs 3331 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3332 if (env->ExceptionCheck()) { 3333 env->ExceptionClear(); 3334 directBufferSupportInitializeFailed = 1; 3335 return false; 3336 } 3337 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3338 if (env->ExceptionCheck()) { 3339 env->ExceptionClear(); 3340 directBufferSupportInitializeFailed = 1; 3341 return false; 3342 } 3343 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3344 if (env->ExceptionCheck()) { 3345 env->ExceptionClear(); 3346 directBufferSupportInitializeFailed = 1; 3347 return false; 3348 } 3349 3350 if ((directByteBufferConstructor == NULL) || 3351 (directBufferAddressField == NULL) || 3352 (bufferCapacityField == NULL)) { 3353 directBufferSupportInitializeFailed = 1; 3354 return false; 3355 } 3356 3357 directBufferSupportInitializeEnded = 1; 3358 } else { 3359 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3360 os::naked_yield(); 3361 } 3362 } 3363 3364 return !directBufferSupportInitializeFailed; 3365 } 3366 3367 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3368 { 3369 // thread_from_jni_environment() will block if VM is gone. 3370 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3371 3372 JNIWrapper("jni_NewDirectByteBuffer"); 3373 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3374 3375 if (!directBufferSupportInitializeEnded) { 3376 if (!initializeDirectBufferSupport(env, thread)) { 3377 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3378 return NULL; 3379 } 3380 } 3381 3382 // Being paranoid about accidental sign extension on address 3383 jlong addr = (jlong) ((uintptr_t) address); 3384 // NOTE that package-private DirectByteBuffer constructor currently 3385 // takes int capacity 3386 jint cap = (jint) capacity; 3387 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3388 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3389 return ret; 3390 } 3391 3392 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3393 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3394 3395 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3396 { 3397 // thread_from_jni_environment() will block if VM is gone. 3398 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3399 3400 JNIWrapper("jni_GetDirectBufferAddress"); 3401 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3402 void* ret = NULL; 3403 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3404 3405 if (!directBufferSupportInitializeEnded) { 3406 if (!initializeDirectBufferSupport(env, thread)) { 3407 return 0; 3408 } 3409 } 3410 3411 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3412 return 0; 3413 } 3414 3415 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3416 return ret; 3417 } 3418 3419 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3420 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3421 3422 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3423 { 3424 // thread_from_jni_environment() will block if VM is gone. 3425 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3426 3427 JNIWrapper("jni_GetDirectBufferCapacity"); 3428 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3429 jlong ret = -1; 3430 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3431 3432 if (!directBufferSupportInitializeEnded) { 3433 if (!initializeDirectBufferSupport(env, thread)) { 3434 ret = 0; 3435 return ret; 3436 } 3437 } 3438 3439 if (buf == NULL) { 3440 return -1; 3441 } 3442 3443 if (!env->IsInstanceOf(buf, directBufferClass)) { 3444 return -1; 3445 } 3446 3447 // NOTE that capacity is currently an int in the implementation 3448 ret = env->GetIntField(buf, bufferCapacityField); 3449 return ret; 3450 } 3451 3452 3453 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3454 JNIWrapper("GetVersion"); 3455 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3456 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3457 return CurrentVersion; 3458 JNI_END 3459 3460 extern struct JavaVM_ main_vm; 3461 3462 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3463 JNIWrapper("jni_GetJavaVM"); 3464 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3465 *vm = (JavaVM *)(&main_vm); 3466 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3467 return JNI_OK; 3468 JNI_END 3469 3470 3471 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3472 JNIWrapper("GetModule"); 3473 return Modules::get_module(clazz, THREAD); 3474 JNI_END 3475 3476 3477 // Structure containing all jni functions 3478 struct JNINativeInterface_ jni_NativeInterface = { 3479 NULL, 3480 NULL, 3481 NULL, 3482 3483 NULL, 3484 3485 jni_GetVersion, 3486 3487 jni_DefineClass, 3488 jni_FindClass, 3489 3490 jni_FromReflectedMethod, 3491 jni_FromReflectedField, 3492 3493 jni_ToReflectedMethod, 3494 3495 jni_GetSuperclass, 3496 jni_IsAssignableFrom, 3497 3498 jni_ToReflectedField, 3499 3500 jni_Throw, 3501 jni_ThrowNew, 3502 jni_ExceptionOccurred, 3503 jni_ExceptionDescribe, 3504 jni_ExceptionClear, 3505 jni_FatalError, 3506 3507 jni_PushLocalFrame, 3508 jni_PopLocalFrame, 3509 3510 jni_NewGlobalRef, 3511 jni_DeleteGlobalRef, 3512 jni_DeleteLocalRef, 3513 jni_IsSameObject, 3514 3515 jni_NewLocalRef, 3516 jni_EnsureLocalCapacity, 3517 3518 jni_AllocObject, 3519 jni_NewObject, 3520 jni_NewObjectV, 3521 jni_NewObjectA, 3522 3523 jni_GetObjectClass, 3524 jni_IsInstanceOf, 3525 3526 jni_GetMethodID, 3527 3528 jni_CallObjectMethod, 3529 jni_CallObjectMethodV, 3530 jni_CallObjectMethodA, 3531 jni_CallBooleanMethod, 3532 jni_CallBooleanMethodV, 3533 jni_CallBooleanMethodA, 3534 jni_CallByteMethod, 3535 jni_CallByteMethodV, 3536 jni_CallByteMethodA, 3537 jni_CallCharMethod, 3538 jni_CallCharMethodV, 3539 jni_CallCharMethodA, 3540 jni_CallShortMethod, 3541 jni_CallShortMethodV, 3542 jni_CallShortMethodA, 3543 jni_CallIntMethod, 3544 jni_CallIntMethodV, 3545 jni_CallIntMethodA, 3546 jni_CallLongMethod, 3547 jni_CallLongMethodV, 3548 jni_CallLongMethodA, 3549 jni_CallFloatMethod, 3550 jni_CallFloatMethodV, 3551 jni_CallFloatMethodA, 3552 jni_CallDoubleMethod, 3553 jni_CallDoubleMethodV, 3554 jni_CallDoubleMethodA, 3555 jni_CallVoidMethod, 3556 jni_CallVoidMethodV, 3557 jni_CallVoidMethodA, 3558 3559 jni_CallNonvirtualObjectMethod, 3560 jni_CallNonvirtualObjectMethodV, 3561 jni_CallNonvirtualObjectMethodA, 3562 jni_CallNonvirtualBooleanMethod, 3563 jni_CallNonvirtualBooleanMethodV, 3564 jni_CallNonvirtualBooleanMethodA, 3565 jni_CallNonvirtualByteMethod, 3566 jni_CallNonvirtualByteMethodV, 3567 jni_CallNonvirtualByteMethodA, 3568 jni_CallNonvirtualCharMethod, 3569 jni_CallNonvirtualCharMethodV, 3570 jni_CallNonvirtualCharMethodA, 3571 jni_CallNonvirtualShortMethod, 3572 jni_CallNonvirtualShortMethodV, 3573 jni_CallNonvirtualShortMethodA, 3574 jni_CallNonvirtualIntMethod, 3575 jni_CallNonvirtualIntMethodV, 3576 jni_CallNonvirtualIntMethodA, 3577 jni_CallNonvirtualLongMethod, 3578 jni_CallNonvirtualLongMethodV, 3579 jni_CallNonvirtualLongMethodA, 3580 jni_CallNonvirtualFloatMethod, 3581 jni_CallNonvirtualFloatMethodV, 3582 jni_CallNonvirtualFloatMethodA, 3583 jni_CallNonvirtualDoubleMethod, 3584 jni_CallNonvirtualDoubleMethodV, 3585 jni_CallNonvirtualDoubleMethodA, 3586 jni_CallNonvirtualVoidMethod, 3587 jni_CallNonvirtualVoidMethodV, 3588 jni_CallNonvirtualVoidMethodA, 3589 3590 jni_GetFieldID, 3591 3592 jni_GetObjectField, 3593 jni_GetBooleanField, 3594 jni_GetByteField, 3595 jni_GetCharField, 3596 jni_GetShortField, 3597 jni_GetIntField, 3598 jni_GetLongField, 3599 jni_GetFloatField, 3600 jni_GetDoubleField, 3601 3602 jni_SetObjectField, 3603 jni_SetBooleanField, 3604 jni_SetByteField, 3605 jni_SetCharField, 3606 jni_SetShortField, 3607 jni_SetIntField, 3608 jni_SetLongField, 3609 jni_SetFloatField, 3610 jni_SetDoubleField, 3611 3612 jni_GetStaticMethodID, 3613 3614 jni_CallStaticObjectMethod, 3615 jni_CallStaticObjectMethodV, 3616 jni_CallStaticObjectMethodA, 3617 jni_CallStaticBooleanMethod, 3618 jni_CallStaticBooleanMethodV, 3619 jni_CallStaticBooleanMethodA, 3620 jni_CallStaticByteMethod, 3621 jni_CallStaticByteMethodV, 3622 jni_CallStaticByteMethodA, 3623 jni_CallStaticCharMethod, 3624 jni_CallStaticCharMethodV, 3625 jni_CallStaticCharMethodA, 3626 jni_CallStaticShortMethod, 3627 jni_CallStaticShortMethodV, 3628 jni_CallStaticShortMethodA, 3629 jni_CallStaticIntMethod, 3630 jni_CallStaticIntMethodV, 3631 jni_CallStaticIntMethodA, 3632 jni_CallStaticLongMethod, 3633 jni_CallStaticLongMethodV, 3634 jni_CallStaticLongMethodA, 3635 jni_CallStaticFloatMethod, 3636 jni_CallStaticFloatMethodV, 3637 jni_CallStaticFloatMethodA, 3638 jni_CallStaticDoubleMethod, 3639 jni_CallStaticDoubleMethodV, 3640 jni_CallStaticDoubleMethodA, 3641 jni_CallStaticVoidMethod, 3642 jni_CallStaticVoidMethodV, 3643 jni_CallStaticVoidMethodA, 3644 3645 jni_GetStaticFieldID, 3646 3647 jni_GetStaticObjectField, 3648 jni_GetStaticBooleanField, 3649 jni_GetStaticByteField, 3650 jni_GetStaticCharField, 3651 jni_GetStaticShortField, 3652 jni_GetStaticIntField, 3653 jni_GetStaticLongField, 3654 jni_GetStaticFloatField, 3655 jni_GetStaticDoubleField, 3656 3657 jni_SetStaticObjectField, 3658 jni_SetStaticBooleanField, 3659 jni_SetStaticByteField, 3660 jni_SetStaticCharField, 3661 jni_SetStaticShortField, 3662 jni_SetStaticIntField, 3663 jni_SetStaticLongField, 3664 jni_SetStaticFloatField, 3665 jni_SetStaticDoubleField, 3666 3667 jni_NewString, 3668 jni_GetStringLength, 3669 jni_GetStringChars, 3670 jni_ReleaseStringChars, 3671 3672 jni_NewStringUTF, 3673 jni_GetStringUTFLength, 3674 jni_GetStringUTFChars, 3675 jni_ReleaseStringUTFChars, 3676 3677 jni_GetArrayLength, 3678 3679 jni_NewObjectArray, 3680 jni_GetObjectArrayElement, 3681 jni_SetObjectArrayElement, 3682 3683 jni_NewBooleanArray, 3684 jni_NewByteArray, 3685 jni_NewCharArray, 3686 jni_NewShortArray, 3687 jni_NewIntArray, 3688 jni_NewLongArray, 3689 jni_NewFloatArray, 3690 jni_NewDoubleArray, 3691 3692 jni_GetBooleanArrayElements, 3693 jni_GetByteArrayElements, 3694 jni_GetCharArrayElements, 3695 jni_GetShortArrayElements, 3696 jni_GetIntArrayElements, 3697 jni_GetLongArrayElements, 3698 jni_GetFloatArrayElements, 3699 jni_GetDoubleArrayElements, 3700 3701 jni_ReleaseBooleanArrayElements, 3702 jni_ReleaseByteArrayElements, 3703 jni_ReleaseCharArrayElements, 3704 jni_ReleaseShortArrayElements, 3705 jni_ReleaseIntArrayElements, 3706 jni_ReleaseLongArrayElements, 3707 jni_ReleaseFloatArrayElements, 3708 jni_ReleaseDoubleArrayElements, 3709 3710 jni_GetBooleanArrayRegion, 3711 jni_GetByteArrayRegion, 3712 jni_GetCharArrayRegion, 3713 jni_GetShortArrayRegion, 3714 jni_GetIntArrayRegion, 3715 jni_GetLongArrayRegion, 3716 jni_GetFloatArrayRegion, 3717 jni_GetDoubleArrayRegion, 3718 3719 jni_SetBooleanArrayRegion, 3720 jni_SetByteArrayRegion, 3721 jni_SetCharArrayRegion, 3722 jni_SetShortArrayRegion, 3723 jni_SetIntArrayRegion, 3724 jni_SetLongArrayRegion, 3725 jni_SetFloatArrayRegion, 3726 jni_SetDoubleArrayRegion, 3727 3728 jni_RegisterNatives, 3729 jni_UnregisterNatives, 3730 3731 jni_MonitorEnter, 3732 jni_MonitorExit, 3733 3734 jni_GetJavaVM, 3735 3736 jni_GetStringRegion, 3737 jni_GetStringUTFRegion, 3738 3739 jni_GetPrimitiveArrayCritical, 3740 jni_ReleasePrimitiveArrayCritical, 3741 3742 jni_GetStringCritical, 3743 jni_ReleaseStringCritical, 3744 3745 jni_NewWeakGlobalRef, 3746 jni_DeleteWeakGlobalRef, 3747 3748 jni_ExceptionCheck, 3749 3750 jni_NewDirectByteBuffer, 3751 jni_GetDirectBufferAddress, 3752 jni_GetDirectBufferCapacity, 3753 3754 // New 1_6 features 3755 3756 jni_GetObjectRefType, 3757 3758 // Module features 3759 3760 jni_GetModule 3761 }; 3762 3763 3764 // For jvmti use to modify jni function table. 3765 // Java threads in native contiues to run until it is transitioned 3766 // to VM at safepoint. Before the transition or before it is blocked 3767 // for safepoint it may access jni function table. VM could crash if 3768 // any java thread access the jni function table in the middle of memcpy. 3769 // To avoid this each function pointers are copied automically. 3770 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3771 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3772 intptr_t *a = (intptr_t *) jni_functions(); 3773 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3774 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3775 Atomic::store(*b++, a++); 3776 } 3777 } 3778 3779 void quicken_jni_functions() { 3780 // Replace Get<Primitive>Field with fast versions 3781 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3782 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3783 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3784 // windows x86 currently needs SEH wrapper and the gain of the fast 3785 // versions currently isn't certain for server vm on uniprocessor. 3786 && os::is_MP() 3787 #endif 3788 ) { 3789 address func; 3790 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3791 if (func != (address)-1) { 3792 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3793 } 3794 func = JNI_FastGetField::generate_fast_get_byte_field(); 3795 if (func != (address)-1) { 3796 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3797 } 3798 func = JNI_FastGetField::generate_fast_get_char_field(); 3799 if (func != (address)-1) { 3800 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3801 } 3802 func = JNI_FastGetField::generate_fast_get_short_field(); 3803 if (func != (address)-1) { 3804 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3805 } 3806 func = JNI_FastGetField::generate_fast_get_int_field(); 3807 if (func != (address)-1) { 3808 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3809 } 3810 func = JNI_FastGetField::generate_fast_get_long_field(); 3811 if (func != (address)-1) { 3812 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3813 } 3814 func = JNI_FastGetField::generate_fast_get_float_field(); 3815 if (func != (address)-1) { 3816 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3817 } 3818 func = JNI_FastGetField::generate_fast_get_double_field(); 3819 if (func != (address)-1) { 3820 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3821 } 3822 } 3823 } 3824 3825 // Returns the function structure 3826 struct JNINativeInterface_* jni_functions() { 3827 #if INCLUDE_JNI_CHECK 3828 if (CheckJNICalls) return jni_functions_check(); 3829 #endif // INCLUDE_JNI_CHECK 3830 return &jni_NativeInterface; 3831 } 3832 3833 // Returns the function structure 3834 struct JNINativeInterface_* jni_functions_nocheck() { 3835 return &jni_NativeInterface; 3836 } 3837 3838 static void post_thread_start_event(const JavaThread* jt) { 3839 assert(jt != NULL, "invariant"); 3840 EventThreadStart event; 3841 if (event.should_commit()) { 3842 event.set_thread(JFR_THREAD_ID(jt)); 3843 event.commit(); 3844 } 3845 } 3846 3847 // Invocation API 3848 3849 3850 // Forward declaration 3851 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3852 3853 // Global invocation API vars 3854 volatile int vm_created = 0; 3855 // Indicate whether it is safe to recreate VM 3856 volatile int safe_to_recreate_vm = 1; 3857 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3858 3859 3860 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3861 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3862 3863 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3864 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3865 3866 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3867 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3868 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3869 jint ret = JNI_ERR; 3870 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3871 3872 if (Threads::is_supported_jni_version(args->version)) { 3873 ret = JNI_OK; 3874 } 3875 // 1.1 style no longer supported in hotspot. 3876 // According the JNI spec, we should update args->version on return. 3877 // We also use the structure to communicate with launcher about default 3878 // stack size. 3879 if (args->version == JNI_VERSION_1_1) { 3880 args->version = JNI_VERSION_1_2; 3881 // javaStackSize is int in arguments structure 3882 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3883 args->javaStackSize = (jint)(ThreadStackSize * K); 3884 } 3885 return ret; 3886 } 3887 3888 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3889 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3890 3891 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3892 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3893 3894 jint result = JNI_ERR; 3895 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3896 3897 // We're about to use Atomic::xchg for synchronization. Some Zero 3898 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3899 // but __sync_lock_test_and_set is not guaranteed to do what we want 3900 // on all architectures. So we check it works before relying on it. 3901 #if defined(ZERO) && defined(ASSERT) 3902 { 3903 jint a = 0xcafebabe; 3904 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3905 void *c = &a; 3906 void *d = Atomic::xchg(&b, &c); 3907 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3908 assert(c == &b && d == &a, "Atomic::xchg() works"); 3909 } 3910 #endif // ZERO && ASSERT 3911 3912 // At the moment it's only possible to have one Java VM, 3913 // since some of the runtime state is in global variables. 3914 3915 // We cannot use our mutex locks here, since they only work on 3916 // Threads. We do an atomic compare and exchange to ensure only 3917 // one thread can call this method at a time 3918 3919 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3920 // the add/dec implementations are dependent on whether we are running 3921 // on a multiprocessor, and at this stage of initialization the os::is_MP 3922 // function used to determine this will always return false. Atomic::xchg 3923 // does not have this problem. 3924 if (Atomic::xchg(1, &vm_created) == 1) { 3925 return JNI_EEXIST; // already created, or create attempt in progress 3926 } 3927 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3928 return JNI_ERR; // someone tried and failed and retry not allowed. 3929 } 3930 3931 assert(vm_created == 1, "vm_created is true during the creation"); 3932 3933 /** 3934 * Certain errors during initialization are recoverable and do not 3935 * prevent this method from being called again at a later time 3936 * (perhaps with different arguments). However, at a certain 3937 * point during initialization if an error occurs we cannot allow 3938 * this function to be called again (or it will crash). In those 3939 * situations, the 'canTryAgain' flag is set to false, which atomically 3940 * sets safe_to_recreate_vm to 1, such that any new call to 3941 * JNI_CreateJavaVM will immediately fail using the above logic. 3942 */ 3943 bool can_try_again = true; 3944 3945 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3946 if (result == JNI_OK) { 3947 JavaThread *thread = JavaThread::current(); 3948 assert(!thread->has_pending_exception(), "should have returned not OK"); 3949 /* thread is thread_in_vm here */ 3950 *vm = (JavaVM *)(&main_vm); 3951 *(JNIEnv**)penv = thread->jni_environment(); 3952 3953 #if INCLUDE_JVMCI 3954 if (EnableJVMCI) { 3955 if (UseJVMCICompiler) { 3956 // JVMCI is initialized on a CompilerThread 3957 if (BootstrapJVMCI) { 3958 JavaThread* THREAD = thread; 3959 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3960 compiler->bootstrap(THREAD); 3961 if (HAS_PENDING_EXCEPTION) { 3962 HandleMark hm; 3963 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3964 } 3965 } 3966 } 3967 } 3968 #endif 3969 3970 // Tracks the time application was running before GC 3971 RuntimeService::record_application_start(); 3972 3973 // Notify JVMTI 3974 if (JvmtiExport::should_post_thread_life()) { 3975 JvmtiExport::post_thread_start(thread); 3976 } 3977 3978 post_thread_start_event(thread); 3979 3980 #ifndef PRODUCT 3981 // Check if we should compile all classes on bootclasspath 3982 if (CompileTheWorld) ClassLoader::compile_the_world(); 3983 if (ReplayCompiles) ciReplay::replay(thread); 3984 3985 // Some platforms (like Win*) need a wrapper around these test 3986 // functions in order to properly handle error conditions. 3987 VMError::test_error_handler(); 3988 if (ExecuteInternalVMTests) { 3989 InternalVMTests::run(); 3990 } 3991 #endif 3992 3993 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3994 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3995 } else { 3996 // If create_vm exits because of a pending exception, exit with that 3997 // exception. In the future when we figure out how to reclaim memory, 3998 // we may be able to exit with JNI_ERR and allow the calling application 3999 // to continue. 4000 if (Universe::is_fully_initialized()) { 4001 // otherwise no pending exception possible - VM will already have aborted 4002 JavaThread* THREAD = JavaThread::current(); 4003 if (HAS_PENDING_EXCEPTION) { 4004 HandleMark hm; 4005 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4006 } 4007 } 4008 4009 if (can_try_again) { 4010 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4011 safe_to_recreate_vm = 1; 4012 } 4013 4014 // Creation failed. We must reset vm_created 4015 *vm = 0; 4016 *(JNIEnv**)penv = 0; 4017 // reset vm_created last to avoid race condition. Use OrderAccess to 4018 // control both compiler and architectural-based reordering. 4019 OrderAccess::release_store(&vm_created, 0); 4020 } 4021 4022 // Flush stdout and stderr before exit. 4023 fflush(stdout); 4024 fflush(stderr); 4025 4026 return result; 4027 4028 } 4029 4030 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4031 jint result = JNI_ERR; 4032 // On Windows, let CreateJavaVM run with SEH protection 4033 #ifdef _WIN32 4034 __try { 4035 #endif 4036 result = JNI_CreateJavaVM_inner(vm, penv, args); 4037 #ifdef _WIN32 4038 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4039 // Nothing to do. 4040 } 4041 #endif 4042 return result; 4043 } 4044 4045 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4046 // See bug 4367188, the wrapper can sometimes cause VM crashes 4047 // JNIWrapper("GetCreatedJavaVMs"); 4048 4049 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4050 4051 if (vm_created == 1) { 4052 if (numVMs != NULL) *numVMs = 1; 4053 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4054 } else { 4055 if (numVMs != NULL) *numVMs = 0; 4056 } 4057 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4058 return JNI_OK; 4059 } 4060 4061 extern "C" { 4062 4063 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4064 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4065 4066 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4067 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4068 jint res = JNI_ERR; 4069 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4070 4071 if (vm_created == 0) { 4072 res = JNI_ERR; 4073 return res; 4074 } 4075 4076 JNIWrapper("DestroyJavaVM"); 4077 JNIEnv *env; 4078 JavaVMAttachArgs destroyargs; 4079 destroyargs.version = CurrentVersion; 4080 destroyargs.name = (char *)"DestroyJavaVM"; 4081 destroyargs.group = NULL; 4082 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4083 if (res != JNI_OK) { 4084 return res; 4085 } 4086 4087 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4088 JavaThread* thread = JavaThread::current(); 4089 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4090 if (Threads::destroy_vm()) { 4091 // Should not change thread state, VM is gone 4092 vm_created = 0; 4093 res = JNI_OK; 4094 return res; 4095 } else { 4096 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4097 res = JNI_ERR; 4098 return res; 4099 } 4100 } 4101 4102 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4103 jint result = JNI_ERR; 4104 // On Windows, we need SEH protection 4105 #ifdef _WIN32 4106 __try { 4107 #endif 4108 result = jni_DestroyJavaVM_inner(vm); 4109 #ifdef _WIN32 4110 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4111 // Nothing to do. 4112 } 4113 #endif 4114 return result; 4115 } 4116 4117 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4118 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4119 4120 // Check below commented out from JDK1.2fcs as well 4121 /* 4122 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4123 return JNI_EVERSION; 4124 } 4125 */ 4126 4127 Thread* t = Thread::current_or_null(); 4128 if (t != NULL) { 4129 // If the thread has been attached this operation is a no-op 4130 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4131 return JNI_OK; 4132 } 4133 4134 // Create a thread and mark it as attaching so it will be skipped by the 4135 // ThreadsListEnumerator - see CR 6404306 4136 JavaThread* thread = new JavaThread(true); 4137 4138 // Set correct safepoint info. The thread is going to call into Java when 4139 // initializing the Java level thread object. Hence, the correct state must 4140 // be set in order for the Safepoint code to deal with it correctly. 4141 thread->set_thread_state(_thread_in_vm); 4142 thread->record_stack_base_and_size(); 4143 thread->initialize_thread_current(); 4144 4145 if (!os::create_attached_thread(thread)) { 4146 thread->smr_delete(); 4147 return JNI_ERR; 4148 } 4149 // Enable stack overflow checks 4150 thread->create_stack_guard_pages(); 4151 4152 thread->initialize_tlab(); 4153 4154 thread->cache_global_variables(); 4155 4156 // Crucial that we do not have a safepoint check for this thread, since it has 4157 // not been added to the Thread list yet. 4158 { Threads_lock->lock_without_safepoint_check(); 4159 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4160 // avoid this thread trying to do a GC before it is added to the thread-list 4161 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4162 Threads::add(thread, daemon); 4163 Threads_lock->unlock(); 4164 } 4165 // Create thread group and name info from attach arguments 4166 oop group = NULL; 4167 char* thread_name = NULL; 4168 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4169 group = JNIHandles::resolve(args->group); 4170 thread_name = args->name; // may be NULL 4171 } 4172 if (group == NULL) group = Universe::main_thread_group(); 4173 4174 // Create Java level thread object and attach it to this thread 4175 bool attach_failed = false; 4176 { 4177 EXCEPTION_MARK; 4178 HandleMark hm(THREAD); 4179 Handle thread_group(THREAD, group); 4180 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4181 if (HAS_PENDING_EXCEPTION) { 4182 CLEAR_PENDING_EXCEPTION; 4183 // cleanup outside the handle mark. 4184 attach_failed = true; 4185 } 4186 } 4187 4188 if (attach_failed) { 4189 // Added missing cleanup 4190 thread->cleanup_failed_attach_current_thread(); 4191 return JNI_ERR; 4192 } 4193 4194 // mark the thread as no longer attaching 4195 // this uses a fence to push the change through so we don't have 4196 // to regrab the threads_lock 4197 thread->set_done_attaching_via_jni(); 4198 4199 // Set java thread status. 4200 java_lang_Thread::set_thread_status(thread->threadObj(), 4201 java_lang_Thread::RUNNABLE); 4202 4203 // Notify the debugger 4204 if (JvmtiExport::should_post_thread_life()) { 4205 JvmtiExport::post_thread_start(thread); 4206 } 4207 4208 post_thread_start_event(thread); 4209 4210 *(JNIEnv**)penv = thread->jni_environment(); 4211 4212 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4213 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4214 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4215 // needed. 4216 4217 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4218 4219 // Perform any platform dependent FPU setup 4220 os::setup_fpu(); 4221 4222 return JNI_OK; 4223 } 4224 4225 4226 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4227 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4228 if (vm_created == 0) { 4229 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4230 return JNI_ERR; 4231 } 4232 4233 JNIWrapper("AttachCurrentThread"); 4234 jint ret = attach_current_thread(vm, penv, _args, false); 4235 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4236 return ret; 4237 } 4238 4239 4240 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4241 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4242 4243 JNIWrapper("DetachCurrentThread"); 4244 4245 // If the thread has already been detached the operation is a no-op 4246 if (Thread::current_or_null() == NULL) { 4247 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4248 return JNI_OK; 4249 } 4250 4251 VM_Exit::block_if_vm_exited(); 4252 4253 JavaThread* thread = JavaThread::current(); 4254 if (thread->has_last_Java_frame()) { 4255 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4256 // Can't detach a thread that's running java, that can't work. 4257 return JNI_ERR; 4258 } 4259 4260 // Safepoint support. Have to do call-back to safepoint code, if in the 4261 // middle of a safepoint operation 4262 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4263 4264 // XXX: Note that JavaThread::exit() call below removes the guards on the 4265 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4266 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4267 // of the guards is visible in jni_AttachCurrentThread above, 4268 // the removal of the guards is buried below in JavaThread::exit() 4269 // here. The abstraction should be more symmetrically either exposed 4270 // or hidden (e.g. it could probably be hidden in the same 4271 // (platform-dependent) methods where we do alternate stack 4272 // maintenance work?) 4273 thread->exit(false, JavaThread::jni_detach); 4274 thread->smr_delete(); 4275 4276 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4277 return JNI_OK; 4278 } 4279 4280 DT_RETURN_MARK_DECL(GetEnv, jint 4281 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4282 4283 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4284 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4285 jint ret = JNI_ERR; 4286 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4287 4288 if (vm_created == 0) { 4289 *penv = NULL; 4290 ret = JNI_EDETACHED; 4291 return ret; 4292 } 4293 4294 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4295 return ret; 4296 } 4297 4298 #ifndef JVMPI_VERSION_1 4299 // need these in order to be polite about older agents 4300 #define JVMPI_VERSION_1 ((jint)0x10000001) 4301 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4302 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4303 #endif // !JVMPI_VERSION_1 4304 4305 Thread* thread = Thread::current_or_null(); 4306 if (thread != NULL && thread->is_Java_thread()) { 4307 if (Threads::is_supported_jni_version_including_1_1(version)) { 4308 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4309 ret = JNI_OK; 4310 return ret; 4311 4312 } else if (version == JVMPI_VERSION_1 || 4313 version == JVMPI_VERSION_1_1 || 4314 version == JVMPI_VERSION_1_2) { 4315 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4316 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4317 ret = JNI_EVERSION; 4318 return ret; 4319 } else if (JvmtiExport::is_jvmdi_version(version)) { 4320 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4321 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4322 ret = JNI_EVERSION; 4323 return ret; 4324 } else { 4325 *penv = NULL; 4326 ret = JNI_EVERSION; 4327 return ret; 4328 } 4329 } else { 4330 *penv = NULL; 4331 ret = JNI_EDETACHED; 4332 return ret; 4333 } 4334 } 4335 4336 4337 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4338 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4339 if (vm_created == 0) { 4340 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4341 return JNI_ERR; 4342 } 4343 4344 JNIWrapper("AttachCurrentThreadAsDaemon"); 4345 jint ret = attach_current_thread(vm, penv, _args, true); 4346 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4347 return ret; 4348 } 4349 4350 4351 } // End extern "C" 4352 4353 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4354 NULL, 4355 NULL, 4356 NULL, 4357 4358 jni_DestroyJavaVM, 4359 jni_AttachCurrentThread, 4360 jni_DetachCurrentThread, 4361 jni_GetEnv, 4362 jni_AttachCurrentThreadAsDaemon 4363 };