1 /* 2 * Copyright (c) 1997, 2016, 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 "ci/ciReplay.hpp" 28 #include "classfile/altHashing.hpp" 29 #include "classfile/classFileStream.hpp" 30 #include "classfile/classLoader.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/modules.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionary.hpp" 36 #include "classfile/vmSymbols.hpp" 37 #include "gc/shared/gcLocker.inline.hpp" 38 #include "interpreter/linkResolver.hpp" 39 #include "memory/allocation.hpp" 40 #include "memory/allocation.inline.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.inline.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceOop.hpp" 46 #include "oops/markOop.hpp" 47 #include "oops/method.hpp" 48 #include "oops/objArrayKlass.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayKlass.hpp" 53 #include "oops/typeArrayOop.hpp" 54 #include "prims/jni.h" 55 #include "prims/jniCheck.hpp" 56 #include "prims/jniExport.hpp" 57 #include "prims/jniFastGetField.hpp" 58 #include "prims/jvm.h" 59 #include "prims/jvm_misc.hpp" 60 #include "prims/jvmtiExport.hpp" 61 #include "prims/jvmtiThreadState.hpp" 62 #include "runtime/atomic.hpp" 63 #include "runtime/compilationPolicy.hpp" 64 #include "runtime/fieldDescriptor.hpp" 65 #include "runtime/fprofiler.hpp" 66 #include "runtime/handles.inline.hpp" 67 #include "runtime/interfaceSupport.hpp" 68 #include "runtime/java.hpp" 69 #include "runtime/javaCalls.hpp" 70 #include "runtime/jfieldIDWorkaround.hpp" 71 #include "runtime/orderAccess.inline.hpp" 72 #include "runtime/reflection.hpp" 73 #include "runtime/sharedRuntime.hpp" 74 #include "runtime/signature.hpp" 75 #include "runtime/thread.inline.hpp" 76 #include "runtime/vm_operations.hpp" 77 #include "services/memTracker.hpp" 78 #include "services/runtimeService.hpp" 79 #include "trace/traceMacros.hpp" 80 #include "trace/tracing.hpp" 81 #include "utilities/defaultStream.hpp" 82 #include "utilities/dtrace.hpp" 83 #include "utilities/events.hpp" 84 #include "utilities/histogram.hpp" 85 #include "utilities/internalVMTests.hpp" 86 #include "utilities/macros.hpp" 87 #if INCLUDE_ALL_GCS 88 #include "gc/g1/g1SATBCardTableModRefBS.hpp" 89 #endif // INCLUDE_ALL_GCS 90 #if INCLUDE_JVMCI 91 #include "jvmci/jvmciCompiler.hpp" 92 #include "jvmci/jvmciRuntime.hpp" 93 #endif 94 95 static jint CurrentVersion = JNI_VERSION_9; 96 97 #ifdef _WIN32 98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 99 #endif 100 101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 102 // '-return' probe regardless of the return path is taken out of the function. 103 // Methods that have multiple return paths use this to avoid having to 104 // instrument each return path. Methods that use CHECK or THROW must use this 105 // since those macros can cause an immedate uninstrumented return. 106 // 107 // In order to get the return value, a reference to the variable containing 108 // the return value must be passed to the contructor of the object, and 109 // the return value must be set before return (since the mark object has 110 // a reference to it). 111 // 112 // Example: 113 // DT_RETURN_MARK_DECL(SomeFunc, int); 114 // JNI_ENTRY(int, SomeFunc, ...) 115 // int return_value = 0; 116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 117 // foo(CHECK_0) 118 // return_value = 5; 119 // return return_value; 120 // JNI_END 121 #define DT_RETURN_MARK_DECL(name, type, probe) \ 122 DTRACE_ONLY( \ 123 class DTraceReturnProbeMark_##name { \ 124 public: \ 125 const type& _ret_ref; \ 126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 127 ~DTraceReturnProbeMark_##name() { \ 128 probe; \ 129 } \ 130 } \ 131 ) 132 // Void functions are simpler since there's no return value 133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 134 DTRACE_ONLY( \ 135 class DTraceReturnProbeMark_##name { \ 136 public: \ 137 ~DTraceReturnProbeMark_##name() { \ 138 probe; \ 139 } \ 140 } \ 141 ) 142 143 // Place these macros in the function to mark the return. Non-void 144 // functions need the type and address of the return value. 145 #define DT_RETURN_MARK(name, type, ref) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 147 #define DT_VOID_RETURN_MARK(name) \ 148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 149 150 151 // Use these to select distinct code for floating-point vs. non-floating point 152 // situations. Used from within common macros where we need slightly 153 // different behavior for Float/Double 154 #define FP_SELECT_Boolean(intcode, fpcode) intcode 155 #define FP_SELECT_Byte(intcode, fpcode) intcode 156 #define FP_SELECT_Char(intcode, fpcode) intcode 157 #define FP_SELECT_Short(intcode, fpcode) intcode 158 #define FP_SELECT_Object(intcode, fpcode) intcode 159 #define FP_SELECT_Int(intcode, fpcode) intcode 160 #define FP_SELECT_Long(intcode, fpcode) intcode 161 #define FP_SELECT_Float(intcode, fpcode) fpcode 162 #define FP_SELECT_Double(intcode, fpcode) fpcode 163 #define FP_SELECT(TypeName, intcode, fpcode) \ 164 FP_SELECT_##TypeName(intcode, fpcode) 165 166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 167 // (dtrace doesn't do FP yet) 168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 172 FP_SELECT(TypeName, \ 173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 174 175 176 // out-of-line helpers for class jfieldIDWorkaround: 177 178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 180 uintptr_t as_uint = (uintptr_t) id; 181 intptr_t offset = raw_instance_offset(id); 182 if (is_checked_jfieldID(id)) { 183 if (!klass_hash_ok(k, id)) { 184 return false; 185 } 186 } 187 return InstanceKlass::cast(k)->contains_field_offset(offset); 188 } else { 189 JNIid* result = (JNIid*) id; 190 #ifdef ASSERT 191 return result != NULL && result->is_static_field_id(); 192 #else 193 return result != NULL; 194 #endif 195 } 196 } 197 198 199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 200 if (offset <= small_offset_mask) { 201 Klass* field_klass = k; 202 Klass* super_klass = field_klass->super(); 203 // With compressed oops the most super class with nonstatic fields would 204 // be the owner of fields embedded in the header. 205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 207 field_klass = super_klass; // super contains the field also 208 super_klass = field_klass->super(); 209 } 210 debug_only(NoSafepointVerifier nosafepoint;) 211 uintptr_t klass_hash = field_klass->identity_hash(); 212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 213 } else { 214 #if 0 215 #ifndef PRODUCT 216 { 217 ResourceMark rm; 218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 219 } 220 #endif 221 #endif 222 return 0; 223 } 224 } 225 226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 227 uintptr_t as_uint = (uintptr_t) id; 228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 229 do { 230 debug_only(NoSafepointVerifier nosafepoint;) 231 // Could use a non-blocking query for identity_hash here... 232 if ((k->identity_hash() & klass_mask) == klass_hash) 233 return true; 234 k = k->super(); 235 } while (k != NULL); 236 return false; 237 } 238 239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 241 uintptr_t as_uint = (uintptr_t) id; 242 intptr_t offset = raw_instance_offset(id); 243 if (VerifyJNIFields) { 244 if (is_checked_jfieldID(id)) { 245 guarantee(klass_hash_ok(k, id), 246 "Bug in native code: jfieldID class must match object"); 247 } else { 248 #if 0 249 #ifndef PRODUCT 250 if (Verbose) { 251 ResourceMark rm; 252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 253 } 254 #endif 255 #endif 256 } 257 } 258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 259 "Bug in native code: jfieldID offset must address interior of object"); 260 } 261 262 // Wrapper to trace JNI functions 263 264 #ifdef ASSERT 265 Histogram* JNIHistogram; 266 static volatile jint JNIHistogram_lock = 0; 267 268 class JNIHistogramElement : public HistogramElement { 269 public: 270 JNIHistogramElement(const char* name); 271 }; 272 273 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 274 _name = elementName; 275 uintx count = 0; 276 277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 279 count +=1; 280 if ( (WarnOnStalledSpinLock > 0) 281 && (count % WarnOnStalledSpinLock == 0)) { 282 warning("JNIHistogram_lock seems to be stalled"); 283 } 284 } 285 } 286 287 288 if(JNIHistogram == NULL) 289 JNIHistogram = new Histogram("JNI Call Counts",100); 290 291 JNIHistogram->add_element(this); 292 Atomic::dec(&JNIHistogram_lock); 293 } 294 295 #define JNICountWrapper(arg) \ 296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 298 if (e != NULL) e->increment_count() 299 #define JNIWrapper(arg) JNICountWrapper(arg); 300 #else 301 #define JNIWrapper(arg) 302 #endif 303 304 305 // Implementation of JNI entries 306 307 DT_RETURN_MARK_DECL(DefineClass, jclass 308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 309 310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 311 const jbyte *buf, jsize bufLen)) 312 JNIWrapper("DefineClass"); 313 314 HOTSPOT_JNI_DEFINECLASS_ENTRY( 315 env, (char*) name, loaderRef, (char*) buf, bufLen); 316 317 jclass cls = NULL; 318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 319 320 TempNewSymbol class_name = NULL; 321 // Since exceptions can be thrown, class initialization can take place 322 // if name is NULL no check for class name in .class stream has to be made. 323 if (name != NULL) { 324 const int str_len = (int)strlen(name); 325 if (str_len > Symbol::max_length()) { 326 // It's impossible to create this class; the name cannot fit 327 // into the constant pool. 328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 329 } 330 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 331 } 332 ResourceMark rm(THREAD); 333 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 334 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 335 336 if (UsePerfData && !class_loader.is_null()) { 337 // check whether the current caller thread holds the lock or not. 338 // If not, increment the corresponding counter 339 if (ObjectSynchronizer:: 340 query_lock_ownership((JavaThread*)THREAD, class_loader) != 341 ObjectSynchronizer::owner_self) { 342 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 343 } 344 } 345 Klass* k = SystemDictionary::resolve_from_stream(class_name, 346 class_loader, 347 Handle(), 348 &st, 349 CHECK_NULL); 350 351 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 352 trace_class_resolution(k); 353 } 354 355 cls = (jclass)JNIHandles::make_local( 356 env, k->java_mirror()); 357 return cls; 358 JNI_END 359 360 361 362 static bool first_time_FindClass = true; 363 364 DT_RETURN_MARK_DECL(FindClass, jclass 365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 366 367 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 368 JNIWrapper("FindClass"); 369 370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 371 372 jclass result = NULL; 373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 374 375 // Remember if we are the first invocation of jni_FindClass 376 bool first_time = first_time_FindClass; 377 first_time_FindClass = false; 378 379 // Sanity check the name: it cannot be null or larger than the maximum size 380 // name we can fit in the constant pool. 381 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 383 } 384 385 //%note jni_3 386 Handle loader; 387 Handle protection_domain; 388 // Find calling class 389 Klass* k = thread->security_get_caller_class(0); 390 if (k != NULL) { 391 loader = Handle(THREAD, k->class_loader()); 392 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 393 // in the correct class context. 394 if (loader.is_null() && 395 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 396 JavaValue result(T_OBJECT); 397 JavaCalls::call_static(&result, k, 398 vmSymbols::getFromClass_name(), 399 vmSymbols::void_class_signature(), 400 thread); 401 if (HAS_PENDING_EXCEPTION) { 402 Handle ex(thread, thread->pending_exception()); 403 CLEAR_PENDING_EXCEPTION; 404 THROW_HANDLE_0(ex); 405 } 406 oop mirror = (oop) result.get_jobject(); 407 loader = Handle(THREAD, 408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 409 protection_domain = Handle(THREAD, 410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 411 } 412 } else { 413 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 414 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 415 } 416 417 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 418 result = find_class_from_class_loader(env, sym, true, loader, 419 protection_domain, true, thread); 420 421 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 422 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 423 } 424 425 // If we were the first invocation of jni_FindClass, we enable compilation again 426 // rather than just allowing invocation counter to overflow and decay. 427 // Controlled by flag DelayCompilationDuringStartup. 428 if (first_time && !CompileTheWorld) 429 CompilationPolicy::completed_vm_startup(); 430 431 return result; 432 JNI_END 433 434 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 436 437 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 438 JNIWrapper("FromReflectedMethod"); 439 440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 441 442 jmethodID ret = NULL; 443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 444 445 // method is a handle to a java.lang.reflect.Method object 446 oop reflected = JNIHandles::resolve_non_null(method); 447 oop mirror = NULL; 448 int slot = 0; 449 450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 451 mirror = java_lang_reflect_Constructor::clazz(reflected); 452 slot = java_lang_reflect_Constructor::slot(reflected); 453 } else { 454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 455 mirror = java_lang_reflect_Method::clazz(reflected); 456 slot = java_lang_reflect_Method::slot(reflected); 457 } 458 Klass* k1 = java_lang_Class::as_Klass(mirror); 459 460 // Make sure class is initialized before handing id's out to methods 461 k1->initialize(CHECK_NULL); 462 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 463 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 464 return ret; 465 JNI_END 466 467 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 468 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 469 470 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 471 JNIWrapper("FromReflectedField"); 472 473 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 474 475 jfieldID ret = NULL; 476 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 477 478 // field is a handle to a java.lang.reflect.Field object 479 oop reflected = JNIHandles::resolve_non_null(field); 480 oop mirror = java_lang_reflect_Field::clazz(reflected); 481 Klass* k1 = java_lang_Class::as_Klass(mirror); 482 int slot = java_lang_reflect_Field::slot(reflected); 483 int modifiers = java_lang_reflect_Field::modifiers(reflected); 484 485 // Make sure class is initialized before handing id's out to fields 486 k1->initialize(CHECK_NULL); 487 488 // First check if this is a static field 489 if (modifiers & JVM_ACC_STATIC) { 490 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 491 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 492 assert(id != NULL, "corrupt Field object"); 493 debug_only(id->set_is_static_field_id();) 494 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 495 ret = jfieldIDWorkaround::to_static_jfieldID(id); 496 return ret; 497 } 498 499 // The slot is the index of the field description in the field-array 500 // The jfieldID is the offset of the field within the object 501 // It may also have hash bits for k, if VerifyJNIFields is turned on. 502 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 503 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 504 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 505 return ret; 506 JNI_END 507 508 509 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 510 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 511 512 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 513 JNIWrapper("ToReflectedMethod"); 514 515 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 516 517 jobject ret = NULL; 518 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 519 520 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 521 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 522 oop reflection_method; 523 if (m->is_initializer()) { 524 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 525 } else { 526 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 527 } 528 ret = JNIHandles::make_local(env, reflection_method); 529 return ret; 530 JNI_END 531 532 DT_RETURN_MARK_DECL(GetSuperclass, jclass 533 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 534 535 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 536 JNIWrapper("GetSuperclass"); 537 538 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 539 540 jclass obj = NULL; 541 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 542 543 oop mirror = JNIHandles::resolve_non_null(sub); 544 // primitive classes return NULL 545 if (java_lang_Class::is_primitive(mirror)) return NULL; 546 547 // Rules of Class.getSuperClass as implemented by KLass::java_super: 548 // arrays return Object 549 // interfaces return NULL 550 // proper classes return Klass::super() 551 Klass* k = java_lang_Class::as_Klass(mirror); 552 if (k->is_interface()) return NULL; 553 554 // return mirror for superclass 555 Klass* super = k->java_super(); 556 // super2 is the value computed by the compiler's getSuperClass intrinsic: 557 debug_only(Klass* super2 = ( k->is_array_klass() 558 ? SystemDictionary::Object_klass() 559 : k->super() ) ); 560 assert(super == super2, 561 "java_super computation depends on interface, array, other super"); 562 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 563 return obj; 564 JNI_END 565 566 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 567 JNIWrapper("IsSubclassOf"); 568 569 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 570 571 oop sub_mirror = JNIHandles::resolve_non_null(sub); 572 oop super_mirror = JNIHandles::resolve_non_null(super); 573 if (java_lang_Class::is_primitive(sub_mirror) || 574 java_lang_Class::is_primitive(super_mirror)) { 575 jboolean ret = (sub_mirror == super_mirror); 576 577 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 578 return ret; 579 } 580 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 581 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 582 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 583 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 584 JNI_TRUE : JNI_FALSE; 585 586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 587 return ret; 588 JNI_END 589 590 591 DT_RETURN_MARK_DECL(Throw, jint 592 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 593 594 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 595 JNIWrapper("Throw"); 596 597 HOTSPOT_JNI_THROW_ENTRY(env, obj); 598 599 jint ret = JNI_OK; 600 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 601 602 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 603 ShouldNotReachHere(); 604 return 0; // Mute compiler. 605 JNI_END 606 607 608 DT_RETURN_MARK_DECL(ThrowNew, jint 609 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 610 611 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 612 JNIWrapper("ThrowNew"); 613 614 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 615 616 jint ret = JNI_OK; 617 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 618 619 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 620 Symbol* name = k->name(); 621 Handle class_loader (THREAD, k->class_loader()); 622 Handle protection_domain (THREAD, k->protection_domain()); 623 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 624 ShouldNotReachHere(); 625 return 0; // Mute compiler. 626 JNI_END 627 628 629 // JNI functions only transform a pending async exception to a synchronous 630 // exception in ExceptionOccurred and ExceptionCheck calls, since 631 // delivering an async exception in other places won't change the native 632 // code's control flow and would be harmful when native code further calls 633 // JNI functions with a pending exception. Async exception is also checked 634 // during the call, so ExceptionOccurred/ExceptionCheck won't return 635 // false but deliver the async exception at the very end during 636 // state transition. 637 638 static void jni_check_async_exceptions(JavaThread *thread) { 639 assert(thread == Thread::current(), "must be itself"); 640 thread->check_and_handle_async_exceptions(); 641 } 642 643 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 644 JNIWrapper("ExceptionOccurred"); 645 646 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 647 648 jni_check_async_exceptions(thread); 649 oop exception = thread->pending_exception(); 650 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 651 652 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 653 return ret; 654 JNI_END 655 656 657 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 658 JNIWrapper("ExceptionDescribe"); 659 660 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 661 662 if (thread->has_pending_exception()) { 663 Handle ex(thread, thread->pending_exception()); 664 thread->clear_pending_exception(); 665 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 666 // Don't print anything if we are being killed. 667 } else { 668 jio_fprintf(defaultStream::error_stream(), "Exception "); 669 if (thread != NULL && thread->threadObj() != NULL) { 670 ResourceMark rm(THREAD); 671 jio_fprintf(defaultStream::error_stream(), 672 "in thread \"%s\" ", thread->get_thread_name()); 673 } 674 if (ex->is_a(SystemDictionary::Throwable_klass())) { 675 JavaValue result(T_VOID); 676 JavaCalls::call_virtual(&result, 677 ex, 678 SystemDictionary::Throwable_klass(), 679 vmSymbols::printStackTrace_name(), 680 vmSymbols::void_method_signature(), 681 THREAD); 682 // If an exception is thrown in the call it gets thrown away. Not much 683 // we can do with it. The native code that calls this, does not check 684 // for the exception - hence, it might still be in the thread when DestroyVM gets 685 // called, potentially causing a few asserts to trigger - since no pending exception 686 // is expected. 687 CLEAR_PENDING_EXCEPTION; 688 } else { 689 ResourceMark rm(THREAD); 690 jio_fprintf(defaultStream::error_stream(), 691 ". Uncaught exception of type %s.", 692 ex->klass()->external_name()); 693 } 694 } 695 } 696 697 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 698 JNI_END 699 700 701 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 702 JNIWrapper("ExceptionClear"); 703 704 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 705 706 // The jni code might be using this API to clear java thrown exception. 707 // So just mark jvmti thread exception state as exception caught. 708 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 709 if (state != NULL && state->is_exception_detected()) { 710 state->set_exception_caught(); 711 } 712 thread->clear_pending_exception(); 713 714 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 715 JNI_END 716 717 718 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 719 JNIWrapper("FatalError"); 720 721 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 722 723 tty->print_cr("FATAL ERROR in native method: %s", msg); 724 thread->print_stack(); 725 os::abort(); // Dump core and abort 726 JNI_END 727 728 729 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 730 JNIWrapper("PushLocalFrame"); 731 732 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 733 734 //%note jni_11 735 if (capacity < 0 || 736 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 737 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 738 return JNI_ERR; 739 } 740 JNIHandleBlock* old_handles = thread->active_handles(); 741 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 742 assert(new_handles != NULL, "should not be NULL"); 743 new_handles->set_pop_frame_link(old_handles); 744 thread->set_active_handles(new_handles); 745 jint ret = JNI_OK; 746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 747 return ret; 748 JNI_END 749 750 751 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 752 JNIWrapper("PopLocalFrame"); 753 754 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 755 756 //%note jni_11 757 Handle result_handle(thread, JNIHandles::resolve(result)); 758 JNIHandleBlock* old_handles = thread->active_handles(); 759 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 760 if (new_handles != NULL) { 761 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 762 // This way code will still work if PopLocalFrame is called without a corresponding 763 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 764 // the release_block call will release the blocks. 765 thread->set_active_handles(new_handles); 766 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 767 JNIHandleBlock::release_block(old_handles, thread); // may block 768 result = JNIHandles::make_local(thread, result_handle()); 769 } 770 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 771 return result; 772 JNI_END 773 774 775 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 776 JNIWrapper("NewGlobalRef"); 777 778 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 779 780 Handle ref_handle(thread, JNIHandles::resolve(ref)); 781 jobject ret = JNIHandles::make_global(ref_handle); 782 783 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 784 return ret; 785 JNI_END 786 787 // Must be JNI_ENTRY (with HandleMark) 788 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 789 JNIWrapper("DeleteGlobalRef"); 790 791 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 792 793 JNIHandles::destroy_global(ref); 794 795 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 796 JNI_END 797 798 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 799 JNIWrapper("DeleteLocalRef"); 800 801 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 802 803 JNIHandles::destroy_local(obj); 804 805 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 806 JNI_END 807 808 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 809 JNIWrapper("IsSameObject"); 810 811 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 812 813 oop a = JNIHandles::resolve(r1); 814 oop b = JNIHandles::resolve(r2); 815 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 816 817 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 818 return ret; 819 JNI_END 820 821 822 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 823 JNIWrapper("NewLocalRef"); 824 825 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 826 827 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 828 829 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 830 return ret; 831 JNI_END 832 833 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 834 JNIWrapper("EnsureLocalCapacity"); 835 836 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 837 838 jint ret; 839 if (capacity >= 0 && 840 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 841 ret = JNI_OK; 842 } else { 843 ret = JNI_ERR; 844 } 845 846 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 847 return ret; 848 JNI_END 849 850 // Return the Handle Type 851 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 852 JNIWrapper("GetObjectRefType"); 853 854 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 855 856 jobjectRefType ret; 857 if (JNIHandles::is_local_handle(thread, obj) || 858 JNIHandles::is_frame_handle(thread, obj)) 859 ret = JNILocalRefType; 860 else if (JNIHandles::is_global_handle(obj)) 861 ret = JNIGlobalRefType; 862 else if (JNIHandles::is_weak_global_handle(obj)) 863 ret = JNIWeakGlobalRefType; 864 else 865 ret = JNIInvalidRefType; 866 867 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 868 return ret; 869 JNI_END 870 871 872 class JNI_ArgumentPusher : public SignatureIterator { 873 protected: 874 JavaCallArguments* _arguments; 875 876 virtual void get_bool () = 0; 877 virtual void get_char () = 0; 878 virtual void get_short () = 0; 879 virtual void get_byte () = 0; 880 virtual void get_int () = 0; 881 virtual void get_long () = 0; 882 virtual void get_float () = 0; 883 virtual void get_double () = 0; 884 virtual void get_object () = 0; 885 886 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 887 this->_return_type = T_ILLEGAL; 888 _arguments = NULL; 889 } 890 891 public: 892 virtual void iterate( uint64_t fingerprint ) = 0; 893 894 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 895 896 inline void do_bool() { if (!is_return_type()) get_bool(); } 897 inline void do_char() { if (!is_return_type()) get_char(); } 898 inline void do_short() { if (!is_return_type()) get_short(); } 899 inline void do_byte() { if (!is_return_type()) get_byte(); } 900 inline void do_int() { if (!is_return_type()) get_int(); } 901 inline void do_long() { if (!is_return_type()) get_long(); } 902 inline void do_float() { if (!is_return_type()) get_float(); } 903 inline void do_double() { if (!is_return_type()) get_double(); } 904 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 905 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 906 inline void do_void() { } 907 908 JavaCallArguments* arguments() { return _arguments; } 909 void push_receiver(Handle h) { _arguments->push_oop(h); } 910 }; 911 912 913 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 914 protected: 915 va_list _ap; 916 917 inline void get_bool() { 918 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 919 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 920 // TemplateInterpreterGenerator::generate_result_handler_for and 921 // SharedRuntime::generate_native_wrapper. 922 jboolean b = va_arg(_ap, jint); 923 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 924 } 925 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 926 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 927 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 928 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 929 930 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 931 932 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 933 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 934 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 935 inline void get_object() { jobject l = va_arg(_ap, jobject); 936 _arguments->push_oop(Handle((oop *)l, false)); } 937 938 inline void set_ap(va_list rap) { 939 va_copy(_ap, rap); 940 } 941 942 public: 943 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 944 : JNI_ArgumentPusher(signature) { 945 set_ap(rap); 946 } 947 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 948 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 949 set_ap(rap); 950 } 951 952 // Optimized path if we have the bitvector form of signature 953 void iterate( uint64_t fingerprint ) { 954 if (fingerprint == (uint64_t)CONST64(-1)) { 955 SignatureIterator::iterate(); // Must be too many arguments 956 } else { 957 _return_type = (BasicType)((fingerprint >> static_feature_size) & 958 result_feature_mask); 959 960 assert(fingerprint, "Fingerprint should not be 0"); 961 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 962 while ( 1 ) { 963 switch ( fingerprint & parameter_feature_mask ) { 964 case bool_parm: 965 get_bool(); 966 break; 967 case char_parm: 968 get_char(); 969 break; 970 case short_parm: 971 get_short(); 972 break; 973 case byte_parm: 974 get_byte(); 975 break; 976 case int_parm: 977 get_int(); 978 break; 979 case obj_parm: 980 get_object(); 981 break; 982 case long_parm: 983 get_long(); 984 break; 985 case float_parm: 986 get_float(); 987 break; 988 case double_parm: 989 get_double(); 990 break; 991 case done_parm: 992 return; 993 break; 994 default: 995 ShouldNotReachHere(); 996 break; 997 } 998 fingerprint >>= parameter_feature_size; 999 } 1000 } 1001 } 1002 }; 1003 1004 1005 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1006 protected: 1007 const jvalue *_ap; 1008 1009 inline void get_bool() { 1010 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1011 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1012 // TemplateInterpreterGenerator::generate_result_handler_for and 1013 // SharedRuntime::generate_native_wrapper. 1014 jboolean b = (_ap++)->z; 1015 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1016 } 1017 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1018 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1019 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1020 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1021 1022 inline void get_long() { _arguments->push_long((_ap++)->j); } 1023 inline void get_float() { _arguments->push_float((_ap++)->f); } 1024 inline void get_double() { _arguments->push_double((_ap++)->d);} 1025 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1026 1027 inline void set_ap(const jvalue *rap) { _ap = rap; } 1028 1029 public: 1030 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1031 : JNI_ArgumentPusher(signature) { 1032 set_ap(rap); 1033 } 1034 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1035 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1036 set_ap(rap); 1037 } 1038 1039 // Optimized path if we have the bitvector form of signature 1040 void iterate( uint64_t fingerprint ) { 1041 if (fingerprint == (uint64_t)CONST64(-1)) { 1042 SignatureIterator::iterate(); // Must be too many arguments 1043 } else { 1044 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1045 result_feature_mask); 1046 assert(fingerprint, "Fingerprint should not be 0"); 1047 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1048 while ( 1 ) { 1049 switch ( fingerprint & parameter_feature_mask ) { 1050 case bool_parm: 1051 get_bool(); 1052 break; 1053 case char_parm: 1054 get_char(); 1055 break; 1056 case short_parm: 1057 get_short(); 1058 break; 1059 case byte_parm: 1060 get_byte(); 1061 break; 1062 case int_parm: 1063 get_int(); 1064 break; 1065 case obj_parm: 1066 get_object(); 1067 break; 1068 case long_parm: 1069 get_long(); 1070 break; 1071 case float_parm: 1072 get_float(); 1073 break; 1074 case double_parm: 1075 get_double(); 1076 break; 1077 case done_parm: 1078 return; 1079 break; 1080 default: 1081 ShouldNotReachHere(); 1082 break; 1083 } 1084 fingerprint >>= parameter_feature_size; 1085 } 1086 } 1087 } 1088 }; 1089 1090 1091 enum JNICallType { 1092 JNI_STATIC, 1093 JNI_VIRTUAL, 1094 JNI_NONVIRTUAL 1095 }; 1096 1097 1098 1099 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1100 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1101 1102 // Create object to hold arguments for the JavaCall, and associate it with 1103 // the jni parser 1104 ResourceMark rm(THREAD); 1105 int number_of_parameters = method->size_of_parameters(); 1106 JavaCallArguments java_args(number_of_parameters); 1107 args->set_java_argument_object(&java_args); 1108 1109 assert(method->is_static(), "method should be static"); 1110 1111 // Fill out JavaCallArguments object 1112 args->iterate( Fingerprinter(method).fingerprint() ); 1113 // Initialize result type 1114 result->set_type(args->get_ret_type()); 1115 1116 // Invoke the method. Result is returned as oop. 1117 JavaCalls::call(result, method, &java_args, CHECK); 1118 1119 // Convert result 1120 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1121 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1122 } 1123 } 1124 1125 1126 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1127 oop recv = JNIHandles::resolve(receiver); 1128 if (recv == NULL) { 1129 THROW(vmSymbols::java_lang_NullPointerException()); 1130 } 1131 Handle h_recv(THREAD, recv); 1132 1133 int number_of_parameters; 1134 Method* selected_method; 1135 { 1136 Method* m = Method::resolve_jmethod_id(method_id); 1137 number_of_parameters = m->size_of_parameters(); 1138 Klass* holder = m->method_holder(); 1139 if (call_type != JNI_VIRTUAL) { 1140 selected_method = m; 1141 } else if (!m->has_itable_index()) { 1142 // non-interface call -- for that little speed boost, don't handlize 1143 debug_only(NoSafepointVerifier nosafepoint;) 1144 // jni_GetMethodID makes sure class is linked and initialized 1145 // so m should have a valid vtable index. 1146 assert(m->valid_vtable_index(), "no valid vtable index"); 1147 int vtbl_index = m->vtable_index(); 1148 if (vtbl_index != Method::nonvirtual_vtable_index) { 1149 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1150 } else { 1151 // final method 1152 selected_method = m; 1153 } 1154 } else { 1155 // interface call 1156 int itbl_index = m->itable_index(); 1157 Klass* k = h_recv->klass(); 1158 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1159 } 1160 } 1161 1162 methodHandle method(THREAD, selected_method); 1163 1164 // Create object to hold arguments for the JavaCall, and associate it with 1165 // the jni parser 1166 ResourceMark rm(THREAD); 1167 JavaCallArguments java_args(number_of_parameters); 1168 args->set_java_argument_object(&java_args); 1169 1170 // handle arguments 1171 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1172 args->push_receiver(h_recv); // Push jobject handle 1173 1174 // Fill out JavaCallArguments object 1175 args->iterate( Fingerprinter(method).fingerprint() ); 1176 // Initialize result type 1177 result->set_type(args->get_ret_type()); 1178 1179 // Invoke the method. Result is returned as oop. 1180 JavaCalls::call(result, method, &java_args, CHECK); 1181 1182 // Convert result 1183 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1184 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1185 } 1186 } 1187 1188 1189 static instanceOop alloc_object(jclass clazz, TRAPS) { 1190 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1191 if (k == NULL) { 1192 ResourceMark rm(THREAD); 1193 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1194 } 1195 k->check_valid_for_instantiation(false, CHECK_NULL); 1196 k->initialize(CHECK_NULL); 1197 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1198 return ih; 1199 } 1200 1201 DT_RETURN_MARK_DECL(AllocObject, jobject 1202 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1203 1204 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1205 JNIWrapper("AllocObject"); 1206 1207 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1208 1209 jobject ret = NULL; 1210 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1211 1212 instanceOop i = alloc_object(clazz, CHECK_NULL); 1213 ret = JNIHandles::make_local(env, i); 1214 return ret; 1215 JNI_END 1216 1217 DT_RETURN_MARK_DECL(NewObjectA, jobject 1218 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1219 1220 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1221 JNIWrapper("NewObjectA"); 1222 1223 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1224 1225 jobject obj = NULL; 1226 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1227 1228 instanceOop i = alloc_object(clazz, CHECK_NULL); 1229 obj = JNIHandles::make_local(env, i); 1230 JavaValue jvalue(T_VOID); 1231 JNI_ArgumentPusherArray ap(methodID, args); 1232 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1233 return obj; 1234 JNI_END 1235 1236 1237 DT_RETURN_MARK_DECL(NewObjectV, jobject 1238 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1239 1240 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1241 JNIWrapper("NewObjectV"); 1242 1243 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1244 1245 jobject obj = NULL; 1246 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1247 1248 instanceOop i = alloc_object(clazz, CHECK_NULL); 1249 obj = JNIHandles::make_local(env, i); 1250 JavaValue jvalue(T_VOID); 1251 JNI_ArgumentPusherVaArg ap(methodID, args); 1252 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1253 return obj; 1254 JNI_END 1255 1256 1257 DT_RETURN_MARK_DECL(NewObject, jobject 1258 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1259 1260 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1261 JNIWrapper("NewObject"); 1262 1263 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1264 1265 jobject obj = NULL; 1266 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1267 1268 instanceOop i = alloc_object(clazz, CHECK_NULL); 1269 obj = JNIHandles::make_local(env, i); 1270 va_list args; 1271 va_start(args, methodID); 1272 JavaValue jvalue(T_VOID); 1273 JNI_ArgumentPusherVaArg ap(methodID, args); 1274 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1275 va_end(args); 1276 return obj; 1277 JNI_END 1278 1279 1280 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1281 JNIWrapper("GetObjectClass"); 1282 1283 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1284 1285 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1286 jclass ret = 1287 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1288 1289 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1290 return ret; 1291 JNI_END 1292 1293 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1294 JNIWrapper("IsInstanceOf"); 1295 1296 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1297 1298 jboolean ret = JNI_TRUE; 1299 if (obj != NULL) { 1300 ret = JNI_FALSE; 1301 Klass* k = java_lang_Class::as_Klass( 1302 JNIHandles::resolve_non_null(clazz)); 1303 if (k != NULL) { 1304 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1305 } 1306 } 1307 1308 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1309 return ret; 1310 JNI_END 1311 1312 1313 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1314 const char *sig, bool is_static, TRAPS) { 1315 // %%%% This code should probably just call into a method in the LinkResolver 1316 // 1317 // The class should have been loaded (we have an instance of the class 1318 // passed in) so the method and signature should already be in the symbol 1319 // table. If they're not there, the method doesn't exist. 1320 const char *name_to_probe = (name_str == NULL) 1321 ? vmSymbols::object_initializer_name()->as_C_string() 1322 : name_str; 1323 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1324 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1325 1326 if (name == NULL || signature == NULL) { 1327 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1328 } 1329 1330 // Throw a NoSuchMethodError exception if we have an instance of a 1331 // primitive java.lang.Class 1332 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1333 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1334 } 1335 1336 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1337 1338 // Make sure class is linked and initialized before handing id's out to 1339 // Method*s. 1340 klass->initialize(CHECK_NULL); 1341 1342 Method* m; 1343 if (name == vmSymbols::object_initializer_name() || 1344 name == vmSymbols::class_initializer_name()) { 1345 // Never search superclasses for constructors 1346 if (klass->is_instance_klass()) { 1347 m = InstanceKlass::cast(klass)->find_method(name, signature); 1348 } else { 1349 m = NULL; 1350 } 1351 } else { 1352 m = klass->lookup_method(name, signature); 1353 if (m == NULL && klass->is_instance_klass()) { 1354 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1355 } 1356 } 1357 if (m == NULL || (m->is_static() != is_static)) { 1358 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1359 } 1360 return m->jmethod_id(); 1361 } 1362 1363 1364 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1365 const char *name, const char *sig)) 1366 JNIWrapper("GetMethodID"); 1367 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1368 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1369 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1370 return ret; 1371 JNI_END 1372 1373 1374 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1375 const char *name, const char *sig)) 1376 JNIWrapper("GetStaticMethodID"); 1377 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1378 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1379 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1380 return ret; 1381 JNI_END 1382 1383 1384 1385 // 1386 // Calling Methods 1387 // 1388 1389 1390 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1391 , EntryProbe, ReturnProbe) \ 1392 \ 1393 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1394 , ReturnProbe); \ 1395 \ 1396 JNI_ENTRY(ResultType, \ 1397 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1398 JNIWrapper("Call" XSTR(Result) "Method"); \ 1399 \ 1400 EntryProbe; \ 1401 ResultType ret = 0;\ 1402 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1403 (const ResultType&)ret);\ 1404 \ 1405 va_list args; \ 1406 va_start(args, methodID); \ 1407 JavaValue jvalue(Tag); \ 1408 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1409 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1410 va_end(args); \ 1411 ret = jvalue.get_##ResultType(); \ 1412 return ret;\ 1413 JNI_END 1414 1415 // the runtime type of subword integral basic types is integer 1416 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1417 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1418 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1419 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1420 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1421 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1422 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1423 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1425 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1426 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1428 1429 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1430 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1431 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1432 DEFINE_CALLMETHOD(jint, Int, T_INT, 1433 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1434 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1435 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1436 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1438 // Float and double probes don't return value because dtrace doesn't currently support it 1439 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1440 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1441 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1442 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1443 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1444 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1445 1446 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1447 , EntryProbe, ReturnProbe) \ 1448 \ 1449 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1450 , ReturnProbe); \ 1451 \ 1452 JNI_ENTRY(ResultType, \ 1453 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1454 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1455 \ 1456 EntryProbe;\ 1457 ResultType ret = 0;\ 1458 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1459 (const ResultType&)ret);\ 1460 \ 1461 JavaValue jvalue(Tag); \ 1462 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1463 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1464 ret = jvalue.get_##ResultType(); \ 1465 return ret;\ 1466 JNI_END 1467 1468 // the runtime type of subword integral basic types is integer 1469 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1470 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1471 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1472 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1473 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1474 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1475 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1476 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1478 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1479 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1481 1482 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1483 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1484 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1485 DEFINE_CALLMETHODV(jint, Int, T_INT, 1486 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1488 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1489 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1491 // Float and double probes don't return value because dtrace doesn't currently support it 1492 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1493 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1494 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1495 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1496 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1497 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1498 1499 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1500 , EntryProbe, ReturnProbe) \ 1501 \ 1502 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1503 , ReturnProbe); \ 1504 \ 1505 JNI_ENTRY(ResultType, \ 1506 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1507 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1508 EntryProbe; \ 1509 ResultType ret = 0;\ 1510 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1511 (const ResultType&)ret);\ 1512 \ 1513 JavaValue jvalue(Tag); \ 1514 JNI_ArgumentPusherArray ap(methodID, args); \ 1515 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1516 ret = jvalue.get_##ResultType(); \ 1517 return ret;\ 1518 JNI_END 1519 1520 // the runtime type of subword integral basic types is integer 1521 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1522 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1523 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1524 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1525 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1526 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1527 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1528 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1530 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1531 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1533 1534 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1535 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1537 DEFINE_CALLMETHODA(jint, Int, T_INT, 1538 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1539 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1540 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1541 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1543 // Float and double probes don't return value because dtrace doesn't currently support it 1544 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1545 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1546 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1547 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1548 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1549 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1550 1551 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1552 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1553 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1554 1555 1556 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1557 JNIWrapper("CallVoidMethod"); 1558 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1559 DT_VOID_RETURN_MARK(CallVoidMethod); 1560 1561 va_list args; 1562 va_start(args, methodID); 1563 JavaValue jvalue(T_VOID); 1564 JNI_ArgumentPusherVaArg ap(methodID, args); 1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1566 va_end(args); 1567 JNI_END 1568 1569 1570 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1571 JNIWrapper("CallVoidMethodV"); 1572 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1573 DT_VOID_RETURN_MARK(CallVoidMethodV); 1574 1575 JavaValue jvalue(T_VOID); 1576 JNI_ArgumentPusherVaArg ap(methodID, args); 1577 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1578 JNI_END 1579 1580 1581 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1582 JNIWrapper("CallVoidMethodA"); 1583 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1584 DT_VOID_RETURN_MARK(CallVoidMethodA); 1585 1586 JavaValue jvalue(T_VOID); 1587 JNI_ArgumentPusherArray ap(methodID, args); 1588 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1589 JNI_END 1590 1591 1592 1593 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1594 , EntryProbe, ReturnProbe) \ 1595 \ 1596 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1597 , ReturnProbe);\ 1598 \ 1599 JNI_ENTRY(ResultType, \ 1600 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1601 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1602 \ 1603 EntryProbe;\ 1604 ResultType ret;\ 1605 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1606 (const ResultType&)ret);\ 1607 \ 1608 va_list args; \ 1609 va_start(args, methodID); \ 1610 JavaValue jvalue(Tag); \ 1611 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1612 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1613 va_end(args); \ 1614 ret = jvalue.get_##ResultType(); \ 1615 return ret;\ 1616 JNI_END 1617 1618 // the runtime type of subword integral basic types is integer 1619 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1620 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1621 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1622 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1623 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1624 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1625 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1626 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1627 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1628 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1629 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1631 1632 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1633 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1634 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1635 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1636 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1637 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1638 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1639 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 // Float and double probes don't return value because dtrace doesn't currently support it 1641 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1642 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1643 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1644 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1645 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1646 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1647 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1648 1649 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1650 , EntryProbe, ReturnProbe) \ 1651 \ 1652 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1653 , ReturnProbe);\ 1654 \ 1655 JNI_ENTRY(ResultType, \ 1656 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1657 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1658 \ 1659 EntryProbe;\ 1660 ResultType ret;\ 1661 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1662 (const ResultType&)ret);\ 1663 \ 1664 JavaValue jvalue(Tag); \ 1665 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1666 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1667 ret = jvalue.get_##ResultType(); \ 1668 return ret;\ 1669 JNI_END 1670 1671 // the runtime type of subword integral basic types is integer 1672 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1673 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1674 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1675 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1676 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1677 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1678 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1679 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1680 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1681 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1682 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1684 1685 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1686 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1687 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1688 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1689 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1690 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1691 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1692 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 // Float and double probes don't return value because dtrace doesn't currently support it 1694 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1695 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1696 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1697 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1698 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1699 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1700 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1701 1702 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1703 , EntryProbe, ReturnProbe) \ 1704 \ 1705 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1706 , ReturnProbe);\ 1707 \ 1708 JNI_ENTRY(ResultType, \ 1709 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1710 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1711 \ 1712 EntryProbe;\ 1713 ResultType ret;\ 1714 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1715 (const ResultType&)ret);\ 1716 \ 1717 JavaValue jvalue(Tag); \ 1718 JNI_ArgumentPusherArray ap(methodID, args); \ 1719 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1720 ret = jvalue.get_##ResultType(); \ 1721 return ret;\ 1722 JNI_END 1723 1724 // the runtime type of subword integral basic types is integer 1725 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1726 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1727 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1728 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1729 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1730 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1731 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1732 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1734 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1735 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1737 1738 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1739 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1740 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1741 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1742 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1743 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1744 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1745 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 // Float and double probes don't return value because dtrace doesn't currently support it 1747 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1748 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1749 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1750 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1751 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1752 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1753 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1754 1755 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1756 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1757 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1758 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1759 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1760 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1761 1762 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1763 JNIWrapper("CallNonvirtualVoidMethod"); 1764 1765 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1766 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1767 1768 va_list args; 1769 va_start(args, methodID); 1770 JavaValue jvalue(T_VOID); 1771 JNI_ArgumentPusherVaArg ap(methodID, args); 1772 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1773 va_end(args); 1774 JNI_END 1775 1776 1777 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1778 JNIWrapper("CallNonvirtualVoidMethodV"); 1779 1780 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1781 env, obj, cls, (uintptr_t) methodID); 1782 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1783 1784 JavaValue jvalue(T_VOID); 1785 JNI_ArgumentPusherVaArg ap(methodID, args); 1786 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1787 JNI_END 1788 1789 1790 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1791 JNIWrapper("CallNonvirtualVoidMethodA"); 1792 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1793 env, obj, cls, (uintptr_t) methodID); 1794 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1795 JavaValue jvalue(T_VOID); 1796 JNI_ArgumentPusherArray ap(methodID, args); 1797 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1798 JNI_END 1799 1800 1801 1802 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1803 , EntryProbe, ResultProbe) \ 1804 \ 1805 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1806 , ResultProbe); \ 1807 \ 1808 JNI_ENTRY(ResultType, \ 1809 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1810 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1811 \ 1812 EntryProbe; \ 1813 ResultType ret = 0;\ 1814 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1815 (const ResultType&)ret);\ 1816 \ 1817 va_list args; \ 1818 va_start(args, methodID); \ 1819 JavaValue jvalue(Tag); \ 1820 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1821 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1822 va_end(args); \ 1823 ret = jvalue.get_##ResultType(); \ 1824 return ret;\ 1825 JNI_END 1826 1827 // the runtime type of subword integral basic types is integer 1828 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1829 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1830 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1831 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1832 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1833 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1834 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1835 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1836 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1837 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1838 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1840 1841 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1842 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1843 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1844 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1845 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1846 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1847 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1848 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1850 // Float and double probes don't return value because dtrace doesn't currently support it 1851 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1852 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1853 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1854 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1855 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1856 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1857 1858 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1859 , EntryProbe, ResultProbe) \ 1860 \ 1861 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1862 , ResultProbe); \ 1863 \ 1864 JNI_ENTRY(ResultType, \ 1865 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1866 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1867 \ 1868 EntryProbe; \ 1869 ResultType ret = 0;\ 1870 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1871 (const ResultType&)ret);\ 1872 \ 1873 JavaValue jvalue(Tag); \ 1874 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1875 /* Make sure class is initialized before trying to invoke its method */ \ 1876 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1877 k->initialize(CHECK_0); \ 1878 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1879 va_end(args); \ 1880 ret = jvalue.get_##ResultType(); \ 1881 return ret;\ 1882 JNI_END 1883 1884 // the runtime type of subword integral basic types is integer 1885 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1886 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1887 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1888 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1889 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1890 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1891 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1892 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1893 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1894 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1895 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1897 1898 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1899 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1900 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1901 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1902 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1903 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1904 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1905 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1907 // Float and double probes don't return value because dtrace doesn't currently support it 1908 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1909 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1910 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1911 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1912 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1913 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1914 1915 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1916 , EntryProbe, ResultProbe) \ 1917 \ 1918 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1919 , ResultProbe); \ 1920 \ 1921 JNI_ENTRY(ResultType, \ 1922 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1923 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1924 \ 1925 EntryProbe; \ 1926 ResultType ret = 0;\ 1927 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1928 (const ResultType&)ret);\ 1929 \ 1930 JavaValue jvalue(Tag); \ 1931 JNI_ArgumentPusherArray ap(methodID, args); \ 1932 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1933 ret = jvalue.get_##ResultType(); \ 1934 return ret;\ 1935 JNI_END 1936 1937 // the runtime type of subword integral basic types is integer 1938 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1939 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1940 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1941 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1942 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1943 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1944 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1945 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1946 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1947 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1948 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1950 1951 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1952 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1953 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1954 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1955 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1956 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1957 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1958 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1960 // Float and double probes don't return value because dtrace doesn't currently support it 1961 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1962 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1963 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1964 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1965 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1966 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1967 1968 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1969 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1970 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1971 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1972 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1973 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1974 1975 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1976 JNIWrapper("CallStaticVoidMethod"); 1977 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1978 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1979 1980 va_list args; 1981 va_start(args, methodID); 1982 JavaValue jvalue(T_VOID); 1983 JNI_ArgumentPusherVaArg ap(methodID, args); 1984 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1985 va_end(args); 1986 JNI_END 1987 1988 1989 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1990 JNIWrapper("CallStaticVoidMethodV"); 1991 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1992 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1993 1994 JavaValue jvalue(T_VOID); 1995 JNI_ArgumentPusherVaArg ap(methodID, args); 1996 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1997 JNI_END 1998 1999 2000 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2001 JNIWrapper("CallStaticVoidMethodA"); 2002 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2003 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2004 2005 JavaValue jvalue(T_VOID); 2006 JNI_ArgumentPusherArray ap(methodID, args); 2007 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2008 JNI_END 2009 2010 2011 // 2012 // Accessing Fields 2013 // 2014 2015 2016 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2017 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2018 2019 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2020 const char *name, const char *sig)) 2021 JNIWrapper("GetFieldID"); 2022 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2023 jfieldID ret = 0; 2024 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2025 2026 // The class should have been loaded (we have an instance of the class 2027 // passed in) so the field and signature should already be in the symbol 2028 // table. If they're not there, the field doesn't exist. 2029 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2030 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2031 if (fieldname == NULL || signame == NULL) { 2032 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2033 } 2034 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2035 // Make sure class is initialized before handing id's out to fields 2036 k->initialize(CHECK_NULL); 2037 2038 fieldDescriptor fd; 2039 if (!k->is_instance_klass() || 2040 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2041 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2042 } 2043 2044 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2045 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2046 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2047 return ret; 2048 JNI_END 2049 2050 2051 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2052 JNIWrapper("GetObjectField"); 2053 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2054 oop o = JNIHandles::resolve_non_null(obj); 2055 Klass* k = o->klass(); 2056 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2057 // Keep JVMTI addition small and only check enabled flag here. 2058 // jni_GetField_probe() assumes that is okay to create handles. 2059 if (JvmtiExport::should_post_field_access()) { 2060 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2061 } 2062 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2063 #if INCLUDE_ALL_GCS 2064 // If G1 is enabled and we are accessing the value of the referent 2065 // field in a reference object then we need to register a non-null 2066 // referent with the SATB barrier. 2067 if (UseG1GC) { 2068 bool needs_barrier = false; 2069 2070 if (ret != NULL && 2071 offset == java_lang_ref_Reference::referent_offset && 2072 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2073 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2074 needs_barrier = true; 2075 } 2076 2077 if (needs_barrier) { 2078 oop referent = JNIHandles::resolve(ret); 2079 G1SATBCardTableModRefBS::enqueue(referent); 2080 } 2081 } 2082 #endif // INCLUDE_ALL_GCS 2083 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2084 return ret; 2085 JNI_END 2086 2087 2088 2089 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2090 , EntryProbe, ReturnProbe) \ 2091 \ 2092 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2093 , ReturnProbe); \ 2094 \ 2095 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2096 JNIWrapper("Get" XSTR(Result) "Field"); \ 2097 \ 2098 EntryProbe; \ 2099 Return ret = 0;\ 2100 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2101 \ 2102 oop o = JNIHandles::resolve_non_null(obj); \ 2103 Klass* k = o->klass(); \ 2104 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2105 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2106 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2107 /* and creates a ResetNoHandleMark. */ \ 2108 if (JvmtiExport::should_post_field_access()) { \ 2109 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2110 } \ 2111 ret = o->Fieldname##_field(offset); \ 2112 return ret; \ 2113 JNI_END 2114 2115 DEFINE_GETFIELD(jboolean, bool, Boolean 2116 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2117 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2118 DEFINE_GETFIELD(jbyte, byte, Byte 2119 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2120 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2121 DEFINE_GETFIELD(jchar, char, Char 2122 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2123 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2124 DEFINE_GETFIELD(jshort, short, Short 2125 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2126 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2127 DEFINE_GETFIELD(jint, int, Int 2128 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2129 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2130 DEFINE_GETFIELD(jlong, long, Long 2131 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2132 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2133 // Float and double probes don't return value because dtrace doesn't currently support it 2134 DEFINE_GETFIELD(jfloat, float, Float 2135 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2137 DEFINE_GETFIELD(jdouble, double, Double 2138 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2139 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2140 2141 address jni_GetBooleanField_addr() { 2142 return (address)jni_GetBooleanField; 2143 } 2144 address jni_GetByteField_addr() { 2145 return (address)jni_GetByteField; 2146 } 2147 address jni_GetCharField_addr() { 2148 return (address)jni_GetCharField; 2149 } 2150 address jni_GetShortField_addr() { 2151 return (address)jni_GetShortField; 2152 } 2153 address jni_GetIntField_addr() { 2154 return (address)jni_GetIntField; 2155 } 2156 address jni_GetLongField_addr() { 2157 return (address)jni_GetLongField; 2158 } 2159 address jni_GetFloatField_addr() { 2160 return (address)jni_GetFloatField; 2161 } 2162 address jni_GetDoubleField_addr() { 2163 return (address)jni_GetDoubleField; 2164 } 2165 2166 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2167 JNIWrapper("SetObjectField"); 2168 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2169 oop o = JNIHandles::resolve_non_null(obj); 2170 Klass* k = o->klass(); 2171 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2172 // Keep JVMTI addition small and only check enabled flag here. 2173 // jni_SetField_probe_nh() assumes that is not okay to create handles 2174 // and creates a ResetNoHandleMark. 2175 if (JvmtiExport::should_post_field_modification()) { 2176 jvalue field_value; 2177 field_value.l = value; 2178 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2179 } 2180 o->obj_field_put(offset, JNIHandles::resolve(value)); 2181 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2182 JNI_END 2183 2184 2185 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2186 , EntryProbe, ReturnProbe) \ 2187 \ 2188 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2189 JNIWrapper("Set" XSTR(Result) "Field"); \ 2190 \ 2191 EntryProbe; \ 2192 \ 2193 oop o = JNIHandles::resolve_non_null(obj); \ 2194 Klass* k = o->klass(); \ 2195 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2196 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2197 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2198 /* and creates a ResetNoHandleMark. */ \ 2199 if (JvmtiExport::should_post_field_modification()) { \ 2200 jvalue field_value; \ 2201 field_value.unionType = value; \ 2202 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2203 } \ 2204 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2205 o->Fieldname##_field_put(offset, value); \ 2206 ReturnProbe; \ 2207 JNI_END 2208 2209 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2210 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2211 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2212 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2213 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2214 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2215 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2216 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2217 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2218 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2219 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2220 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2221 DEFINE_SETFIELD(jint, int, Int, 'I', i 2222 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2223 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2224 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2225 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2226 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2227 // Float and double probes don't return value because dtrace doesn't currently support it 2228 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2229 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2230 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2231 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2232 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2233 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2234 2235 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2236 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2237 2238 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2239 JNIWrapper("ToReflectedField"); 2240 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2241 jobject ret = NULL; 2242 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2243 2244 fieldDescriptor fd; 2245 bool found = false; 2246 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2247 2248 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2249 2250 if (isStatic) { 2251 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2252 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2253 assert(id->is_static_field_id(), "invalid static field id"); 2254 found = id->find_local_field(&fd); 2255 } else { 2256 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2257 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2258 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2259 } 2260 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2261 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2262 ret = JNIHandles::make_local(env, reflected); 2263 return ret; 2264 JNI_END 2265 2266 2267 // 2268 // Accessing Static Fields 2269 // 2270 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2271 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2272 2273 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2274 const char *name, const char *sig)) 2275 JNIWrapper("GetStaticFieldID"); 2276 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2277 jfieldID ret = NULL; 2278 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2279 2280 // The class should have been loaded (we have an instance of the class 2281 // passed in) so the field and signature should already be in the symbol 2282 // table. If they're not there, the field doesn't exist. 2283 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2284 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2285 if (fieldname == NULL || signame == NULL) { 2286 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2287 } 2288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2289 // Make sure class is initialized before handing id's out to static fields 2290 k->initialize(CHECK_NULL); 2291 2292 fieldDescriptor fd; 2293 if (!k->is_instance_klass() || 2294 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2295 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2296 } 2297 2298 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2299 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2300 debug_only(id->set_is_static_field_id();) 2301 2302 debug_only(id->verify(fd.field_holder())); 2303 2304 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2305 return ret; 2306 JNI_END 2307 2308 2309 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2310 JNIWrapper("GetStaticObjectField"); 2311 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2312 #if INCLUDE_JNI_CHECK 2313 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2314 #endif // INCLUDE_JNI_CHECK 2315 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2316 assert(id->is_static_field_id(), "invalid static field id"); 2317 // Keep JVMTI addition small and only check enabled flag here. 2318 // jni_GetField_probe() assumes that is okay to create handles. 2319 if (JvmtiExport::should_post_field_access()) { 2320 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2321 } 2322 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2323 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2324 return ret; 2325 JNI_END 2326 2327 2328 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2329 , EntryProbe, ReturnProbe) \ 2330 \ 2331 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2332 , ReturnProbe); \ 2333 \ 2334 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2335 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2336 EntryProbe; \ 2337 Return ret = 0;\ 2338 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2339 (const Return&)ret);\ 2340 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2341 assert(id->is_static_field_id(), "invalid static field id"); \ 2342 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2343 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2344 if (JvmtiExport::should_post_field_access()) { \ 2345 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2346 } \ 2347 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2348 return ret;\ 2349 JNI_END 2350 2351 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2352 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2353 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2354 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2355 DEFINE_GETSTATICFIELD(jchar, char, Char 2356 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2357 DEFINE_GETSTATICFIELD(jshort, short, Short 2358 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2359 DEFINE_GETSTATICFIELD(jint, int, Int 2360 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2361 DEFINE_GETSTATICFIELD(jlong, long, Long 2362 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2363 // Float and double probes don't return value because dtrace doesn't currently support it 2364 DEFINE_GETSTATICFIELD(jfloat, float, Float 2365 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2366 DEFINE_GETSTATICFIELD(jdouble, double, Double 2367 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2368 2369 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2370 JNIWrapper("SetStaticObjectField"); 2371 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2372 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2373 assert(id->is_static_field_id(), "invalid static field id"); 2374 // Keep JVMTI addition small and only check enabled flag here. 2375 // jni_SetField_probe() assumes that is okay to create handles. 2376 if (JvmtiExport::should_post_field_modification()) { 2377 jvalue field_value; 2378 field_value.l = value; 2379 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2380 } 2381 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2382 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2383 JNI_END 2384 2385 2386 2387 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2388 , EntryProbe, ReturnProbe) \ 2389 \ 2390 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2391 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2392 EntryProbe; \ 2393 \ 2394 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2395 assert(id->is_static_field_id(), "invalid static field id"); \ 2396 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2397 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2398 if (JvmtiExport::should_post_field_modification()) { \ 2399 jvalue field_value; \ 2400 field_value.unionType = value; \ 2401 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2402 } \ 2403 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2404 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2405 ReturnProbe;\ 2406 JNI_END 2407 2408 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2409 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2410 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2411 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2412 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2413 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2414 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2415 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2416 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2417 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2418 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2419 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2420 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2421 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2422 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2423 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2424 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2425 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2426 // Float and double probes don't return value because dtrace doesn't currently support it 2427 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2428 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2429 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2430 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2431 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2432 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2433 2434 // 2435 // String Operations 2436 // 2437 2438 // Unicode Interface 2439 2440 DT_RETURN_MARK_DECL(NewString, jstring 2441 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2442 2443 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2444 JNIWrapper("NewString"); 2445 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2446 jstring ret = NULL; 2447 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2448 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2449 ret = (jstring) JNIHandles::make_local(env, string); 2450 return ret; 2451 JNI_END 2452 2453 2454 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2455 JNIWrapper("GetStringLength"); 2456 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2457 jsize ret = 0; 2458 oop s = JNIHandles::resolve_non_null(string); 2459 if (java_lang_String::value(s) != NULL) { 2460 ret = java_lang_String::length(s); 2461 } 2462 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2463 return ret; 2464 JNI_END 2465 2466 2467 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2468 JNIEnv *env, jstring string, jboolean *isCopy)) 2469 JNIWrapper("GetStringChars"); 2470 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2471 jchar* buf = NULL; 2472 oop s = JNIHandles::resolve_non_null(string); 2473 typeArrayOop s_value = java_lang_String::value(s); 2474 if (s_value != NULL) { 2475 int s_len = java_lang_String::length(s); 2476 bool is_latin1 = java_lang_String::is_latin1(s); 2477 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2478 /* JNI Specification states return NULL on OOM */ 2479 if (buf != NULL) { 2480 if (s_len > 0) { 2481 if (!is_latin1) { 2482 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2483 } else { 2484 for (int i = 0; i < s_len; i++) { 2485 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2486 } 2487 } 2488 } 2489 buf[s_len] = 0; 2490 //%note jni_5 2491 if (isCopy != NULL) { 2492 *isCopy = JNI_TRUE; 2493 } 2494 } 2495 } 2496 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2497 return buf; 2498 JNI_END 2499 2500 2501 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2502 JNIWrapper("ReleaseStringChars"); 2503 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2504 //%note jni_6 2505 if (chars != NULL) { 2506 // Since String objects are supposed to be immutable, don't copy any 2507 // new data back. A bad user will have to go after the char array. 2508 FreeHeap((void*) chars); 2509 } 2510 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2511 JNI_END 2512 2513 2514 // UTF Interface 2515 2516 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2517 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2518 2519 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2520 JNIWrapper("NewStringUTF"); 2521 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2522 jstring ret; 2523 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2524 2525 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2526 ret = (jstring) JNIHandles::make_local(env, result); 2527 return ret; 2528 JNI_END 2529 2530 2531 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2532 JNIWrapper("GetStringUTFLength"); 2533 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2534 jsize ret = 0; 2535 oop java_string = JNIHandles::resolve_non_null(string); 2536 if (java_lang_String::value(java_string) != NULL) { 2537 ret = java_lang_String::utf8_length(java_string); 2538 } 2539 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2540 return ret; 2541 JNI_END 2542 2543 2544 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2545 JNIWrapper("GetStringUTFChars"); 2546 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2547 char* result = NULL; 2548 oop java_string = JNIHandles::resolve_non_null(string); 2549 if (java_lang_String::value(java_string) != NULL) { 2550 size_t length = java_lang_String::utf8_length(java_string); 2551 /* JNI Specification states return NULL on OOM */ 2552 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2553 if (result != NULL) { 2554 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2555 if (isCopy != NULL) { 2556 *isCopy = JNI_TRUE; 2557 } 2558 } 2559 } 2560 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2561 return result; 2562 JNI_END 2563 2564 2565 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2566 JNIWrapper("ReleaseStringUTFChars"); 2567 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2568 if (chars != NULL) { 2569 FreeHeap((char*) chars); 2570 } 2571 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2572 JNI_END 2573 2574 2575 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2576 JNIWrapper("GetArrayLength"); 2577 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2578 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2579 assert(a->is_array(), "must be array"); 2580 jsize ret = a->length(); 2581 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2582 return ret; 2583 JNI_END 2584 2585 2586 // 2587 // Object Array Operations 2588 // 2589 2590 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2591 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2592 2593 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2594 JNIWrapper("NewObjectArray"); 2595 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2596 jobjectArray ret = NULL; 2597 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2598 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2599 Klass* ak = ek->array_klass(CHECK_NULL); 2600 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2601 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2602 oop initial_value = JNIHandles::resolve(initialElement); 2603 if (initial_value != NULL) { // array already initialized with NULL 2604 for (int index = 0; index < length; index++) { 2605 result->obj_at_put(index, initial_value); 2606 } 2607 } 2608 ret = (jobjectArray) JNIHandles::make_local(env, result); 2609 return ret; 2610 JNI_END 2611 2612 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2613 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2614 2615 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2616 JNIWrapper("GetObjectArrayElement"); 2617 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2618 jobject ret = NULL; 2619 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2620 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2621 if (a->is_within_bounds(index)) { 2622 ret = JNIHandles::make_local(env, a->obj_at(index)); 2623 return ret; 2624 } else { 2625 char buf[jintAsStringSize]; 2626 sprintf(buf, "%d", index); 2627 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2628 } 2629 JNI_END 2630 2631 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2632 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2633 2634 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2635 JNIWrapper("SetObjectArrayElement"); 2636 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2637 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2638 2639 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2640 oop v = JNIHandles::resolve(value); 2641 if (a->is_within_bounds(index)) { 2642 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2643 a->obj_at_put(index, v); 2644 } else { 2645 THROW(vmSymbols::java_lang_ArrayStoreException()); 2646 } 2647 } else { 2648 char buf[jintAsStringSize]; 2649 sprintf(buf, "%d", index); 2650 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2651 } 2652 JNI_END 2653 2654 2655 2656 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2657 ,EntryProbe,ReturnProbe) \ 2658 \ 2659 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2660 , ReturnProbe); \ 2661 \ 2662 JNI_ENTRY(Return, \ 2663 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2664 JNIWrapper("New" XSTR(Result) "Array"); \ 2665 EntryProbe; \ 2666 Return ret = NULL;\ 2667 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2668 \ 2669 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2670 ret = (Return) JNIHandles::make_local(env, obj); \ 2671 return ret;\ 2672 JNI_END 2673 2674 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2675 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2676 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2677 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2678 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2679 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2680 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2681 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2682 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2683 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2684 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2685 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2686 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2687 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2688 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2689 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2690 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2691 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2692 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2693 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2694 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2695 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2696 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2697 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2698 2699 // Return an address which will fault if the caller writes to it. 2700 2701 static char* get_bad_address() { 2702 static char* bad_address = NULL; 2703 if (bad_address == NULL) { 2704 size_t size = os::vm_allocation_granularity(); 2705 bad_address = os::reserve_memory(size); 2706 if (bad_address != NULL) { 2707 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2708 /*is_committed*/false); 2709 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2710 } 2711 } 2712 return bad_address; 2713 } 2714 2715 2716 2717 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2718 , EntryProbe, ReturnProbe) \ 2719 \ 2720 JNI_QUICK_ENTRY(ElementType*, \ 2721 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2722 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2723 EntryProbe; \ 2724 /* allocate an chunk of memory in c land */ \ 2725 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2726 ElementType* result; \ 2727 int len = a->length(); \ 2728 if (len == 0) { \ 2729 /* Empty array: legal but useless, can't return NULL. \ 2730 * Return a pointer to something useless. \ 2731 * Avoid asserts in typeArrayOop. */ \ 2732 result = (ElementType*)get_bad_address(); \ 2733 } else { \ 2734 /* JNI Specification states return NULL on OOM */ \ 2735 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2736 if (result != NULL) { \ 2737 /* copy the array to the c chunk */ \ 2738 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2739 if (isCopy) { \ 2740 *isCopy = JNI_TRUE; \ 2741 } \ 2742 } \ 2743 } \ 2744 ReturnProbe; \ 2745 return result; \ 2746 JNI_END 2747 2748 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2749 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2750 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2751 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2752 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2753 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2754 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2755 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2756 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2757 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2758 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2760 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2761 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2762 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2763 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2764 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2765 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2766 // Float and double probes don't return value because dtrace doesn't currently support it 2767 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2768 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2769 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2770 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2771 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2772 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2773 2774 2775 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2776 , EntryProbe, ReturnProbe);\ 2777 \ 2778 JNI_QUICK_ENTRY(void, \ 2779 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2780 ElementType *buf, jint mode)) \ 2781 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2782 EntryProbe; \ 2783 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2784 int len = a->length(); \ 2785 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2786 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2787 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2788 } \ 2789 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2790 FreeHeap(buf); \ 2791 } \ 2792 } \ 2793 ReturnProbe; \ 2794 JNI_END 2795 2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2797 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2798 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2800 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2801 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2803 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2804 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2806 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2807 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2809 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2810 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2812 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2813 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2815 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2816 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2818 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2819 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2820 2821 2822 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2823 , EntryProbe, ReturnProbe); \ 2824 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2825 , ReturnProbe); \ 2826 \ 2827 JNI_ENTRY(void, \ 2828 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2829 jsize len, ElementType *buf)) \ 2830 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2831 EntryProbe; \ 2832 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2833 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2834 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2835 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2836 } else { \ 2837 if (len > 0) { \ 2838 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2839 memcpy((u_char*) buf, \ 2840 (u_char*) src->Tag##_at_addr(start), \ 2841 len << sc); \ 2842 } \ 2843 } \ 2844 JNI_END 2845 2846 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2847 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2848 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2849 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2850 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2851 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2852 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2853 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2854 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2855 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2856 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2857 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2858 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2859 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2860 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2861 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2862 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2863 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2864 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2865 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2866 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2867 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2868 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2869 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2870 2871 2872 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2873 , EntryProbe, ReturnProbe); \ 2874 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2875 ,ReturnProbe); \ 2876 \ 2877 JNI_ENTRY(void, \ 2878 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2879 jsize len, const ElementType *buf)) \ 2880 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2881 EntryProbe; \ 2882 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2883 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2884 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2885 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2886 } else { \ 2887 if (len > 0) { \ 2888 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2889 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2890 (u_char*) buf, \ 2891 len << sc); \ 2892 } \ 2893 } \ 2894 JNI_END 2895 2896 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2897 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2898 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2899 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2900 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2901 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2902 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2903 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2904 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2905 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2906 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2907 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2908 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2909 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2910 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2911 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2912 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2913 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2914 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2915 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2916 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2917 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2918 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2919 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2920 2921 2922 // 2923 // Interception of natives 2924 // 2925 2926 // The RegisterNatives call being attempted tried to register with a method that 2927 // is not native. Ask JVM TI what prefixes have been specified. Then check 2928 // to see if the native method is now wrapped with the prefixes. See the 2929 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2930 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2931 #if INCLUDE_JVMTI 2932 ResourceMark rm(THREAD); 2933 Method* method; 2934 int name_len = name->utf8_length(); 2935 char* name_str = name->as_utf8(); 2936 int prefix_count; 2937 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2938 for (int i = 0; i < prefix_count; i++) { 2939 char* prefix = prefixes[i]; 2940 int prefix_len = (int)strlen(prefix); 2941 2942 // try adding this prefix to the method name and see if it matches another method name 2943 int trial_len = name_len + prefix_len; 2944 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2945 strcpy(trial_name_str, prefix); 2946 strcat(trial_name_str, name_str); 2947 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2948 if (trial_name == NULL) { 2949 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2950 } 2951 method = k->lookup_method(trial_name, signature); 2952 if (method == NULL) { 2953 continue; // signature doesn't match, try the next prefix 2954 } 2955 if (method->is_native()) { 2956 method->set_is_prefixed_native(); 2957 return method; // wahoo, we found a prefixed version of the method, return it 2958 } 2959 // found as non-native, so prefix is good, add it, probably just need more prefixes 2960 name_len = trial_len; 2961 name_str = trial_name_str; 2962 } 2963 #endif // INCLUDE_JVMTI 2964 return NULL; // not found 2965 } 2966 2967 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2968 Method* method = k->lookup_method(name, signature); 2969 if (method == NULL) { 2970 ResourceMark rm; 2971 stringStream st; 2972 st.print("Method %s name or signature does not match", 2973 Method::name_and_sig_as_C_string(k, name, signature)); 2974 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2975 } 2976 if (!method->is_native()) { 2977 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2978 method = find_prefixed_native(k, name, signature, THREAD); 2979 if (method == NULL) { 2980 ResourceMark rm; 2981 stringStream st; 2982 st.print("Method %s is not declared as native", 2983 Method::name_and_sig_as_C_string(k, name, signature)); 2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2985 } 2986 } 2987 2988 if (entry != NULL) { 2989 method->set_native_function(entry, 2990 Method::native_bind_event_is_interesting); 2991 } else { 2992 method->clear_native_function(); 2993 } 2994 if (PrintJNIResolving) { 2995 ResourceMark rm(THREAD); 2996 tty->print_cr("[Registering JNI native method %s.%s]", 2997 method->method_holder()->external_name(), 2998 method->name()->as_C_string()); 2999 } 3000 return true; 3001 } 3002 3003 DT_RETURN_MARK_DECL(RegisterNatives, jint 3004 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3005 3006 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3007 const JNINativeMethod *methods, 3008 jint nMethods)) 3009 JNIWrapper("RegisterNatives"); 3010 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3011 jint ret = 0; 3012 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3013 3014 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3015 3016 for (int index = 0; index < nMethods; index++) { 3017 const char* meth_name = methods[index].name; 3018 const char* meth_sig = methods[index].signature; 3019 int meth_name_len = (int)strlen(meth_name); 3020 3021 // The class should have been loaded (we have an instance of the class 3022 // passed in) so the method and signature should already be in the symbol 3023 // table. If they're not there, the method doesn't exist. 3024 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3025 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3026 3027 if (name == NULL || signature == NULL) { 3028 ResourceMark rm; 3029 stringStream st; 3030 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3031 // Must return negative value on failure 3032 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3033 } 3034 3035 bool res = register_native(k, name, signature, 3036 (address) methods[index].fnPtr, THREAD); 3037 if (!res) { 3038 ret = -1; 3039 break; 3040 } 3041 } 3042 return ret; 3043 JNI_END 3044 3045 3046 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3047 JNIWrapper("UnregisterNatives"); 3048 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3049 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3050 //%note jni_2 3051 if (k->is_instance_klass()) { 3052 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3053 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3054 if (m->is_native()) { 3055 m->clear_native_function(); 3056 m->set_signature_handler(NULL); 3057 } 3058 } 3059 } 3060 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3061 return 0; 3062 JNI_END 3063 3064 // 3065 // Monitor functions 3066 // 3067 3068 DT_RETURN_MARK_DECL(MonitorEnter, jint 3069 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3070 3071 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3072 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3073 jint ret = JNI_ERR; 3074 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3075 3076 // If the object is null, we can't do anything with it 3077 if (jobj == NULL) { 3078 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3079 } 3080 3081 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3082 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3083 ret = JNI_OK; 3084 return ret; 3085 JNI_END 3086 3087 DT_RETURN_MARK_DECL(MonitorExit, jint 3088 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3089 3090 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3091 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3092 jint ret = JNI_ERR; 3093 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3094 3095 // Don't do anything with a null object 3096 if (jobj == NULL) { 3097 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3098 } 3099 3100 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3101 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3102 3103 ret = JNI_OK; 3104 return ret; 3105 JNI_END 3106 3107 // 3108 // Extensions 3109 // 3110 3111 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3112 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3113 3114 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3115 JNIWrapper("GetStringRegion"); 3116 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3117 DT_VOID_RETURN_MARK(GetStringRegion); 3118 oop s = JNIHandles::resolve_non_null(string); 3119 int s_len = java_lang_String::length(s); 3120 if (start < 0 || len < 0 || start + len > s_len) { 3121 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3122 } else { 3123 if (len > 0) { 3124 typeArrayOop s_value = java_lang_String::value(s); 3125 bool is_latin1 = java_lang_String::is_latin1(s); 3126 if (!is_latin1) { 3127 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3128 } else { 3129 for (int i = 0; i < len; i++) { 3130 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3131 } 3132 } 3133 } 3134 } 3135 JNI_END 3136 3137 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3138 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3139 3140 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3141 JNIWrapper("GetStringUTFRegion"); 3142 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3143 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3144 oop s = JNIHandles::resolve_non_null(string); 3145 int s_len = java_lang_String::length(s); 3146 if (start < 0 || len < 0 || start + len > s_len) { 3147 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3148 } else { 3149 //%note jni_7 3150 if (len > 0) { 3151 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3152 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3153 // as_utf8_string null-terminates the result string 3154 } else { 3155 // JDK null-terminates the buffer even in len is zero 3156 if (buf != NULL) { 3157 buf[0] = 0; 3158 } 3159 } 3160 } 3161 JNI_END 3162 3163 3164 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3165 JNIWrapper("GetPrimitiveArrayCritical"); 3166 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3167 GCLocker::lock_critical(thread); 3168 if (isCopy != NULL) { 3169 *isCopy = JNI_FALSE; 3170 } 3171 oop a = JNIHandles::resolve_non_null(array); 3172 assert(a->is_array(), "just checking"); 3173 BasicType type; 3174 if (a->is_objArray()) { 3175 type = T_OBJECT; 3176 } else { 3177 type = TypeArrayKlass::cast(a->klass())->element_type(); 3178 } 3179 void* ret = arrayOop(a)->base(type); 3180 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3181 return ret; 3182 JNI_END 3183 3184 3185 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3186 JNIWrapper("ReleasePrimitiveArrayCritical"); 3187 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3188 // The array, carray and mode arguments are ignored 3189 GCLocker::unlock_critical(thread); 3190 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3191 JNI_END 3192 3193 3194 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3195 JNIWrapper("GetStringCritical"); 3196 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3197 GCLocker::lock_critical(thread); 3198 oop s = JNIHandles::resolve_non_null(string); 3199 typeArrayOop s_value = java_lang_String::value(s); 3200 bool is_latin1 = java_lang_String::is_latin1(s); 3201 if (isCopy != NULL) { 3202 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3203 } 3204 jchar* ret; 3205 if (!is_latin1) { 3206 ret = (jchar*) s_value->base(T_CHAR); 3207 } else { 3208 // Inflate latin1 encoded string to UTF16 3209 int s_len = java_lang_String::length(s); 3210 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3211 /* JNI Specification states return NULL on OOM */ 3212 if (ret != NULL) { 3213 for (int i = 0; i < s_len; i++) { 3214 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3215 } 3216 ret[s_len] = 0; 3217 } 3218 } 3219 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3220 return ret; 3221 JNI_END 3222 3223 3224 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3225 JNIWrapper("ReleaseStringCritical"); 3226 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3227 // The str and chars arguments are ignored for UTF16 strings 3228 oop s = JNIHandles::resolve_non_null(str); 3229 bool is_latin1 = java_lang_String::is_latin1(s); 3230 if (is_latin1) { 3231 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3232 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3233 FREE_C_HEAP_ARRAY(jchar, chars); 3234 } 3235 GCLocker::unlock_critical(thread); 3236 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3237 JNI_END 3238 3239 3240 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3241 JNIWrapper("jni_NewWeakGlobalRef"); 3242 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3243 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3244 jweak ret = JNIHandles::make_weak_global(ref_handle); 3245 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3246 return ret; 3247 JNI_END 3248 3249 // Must be JNI_ENTRY (with HandleMark) 3250 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3251 JNIWrapper("jni_DeleteWeakGlobalRef"); 3252 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3253 JNIHandles::destroy_weak_global(ref); 3254 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3255 JNI_END 3256 3257 3258 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3259 JNIWrapper("jni_ExceptionCheck"); 3260 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3261 jni_check_async_exceptions(thread); 3262 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3263 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3264 return ret; 3265 JNI_END 3266 3267 3268 // Initialization state for three routines below relating to 3269 // java.nio.DirectBuffers 3270 static jint directBufferSupportInitializeStarted = 0; 3271 static volatile jint directBufferSupportInitializeEnded = 0; 3272 static volatile jint directBufferSupportInitializeFailed = 0; 3273 static jclass bufferClass = NULL; 3274 static jclass directBufferClass = NULL; 3275 static jclass directByteBufferClass = NULL; 3276 static jmethodID directByteBufferConstructor = NULL; 3277 static jfieldID directBufferAddressField = NULL; 3278 static jfieldID bufferCapacityField = NULL; 3279 3280 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3281 Handle loader; // null (bootstrap) loader 3282 Handle protection_domain; // null protection domain 3283 3284 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3285 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3286 3287 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3288 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3289 } 3290 return result; 3291 } 3292 3293 // These lookups are done with the NULL (bootstrap) ClassLoader to 3294 // circumvent any security checks that would be done by jni_FindClass. 3295 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3296 { 3297 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3298 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3299 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3300 return true; 3301 } 3302 JNI_END 3303 3304 3305 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3306 if (directBufferSupportInitializeFailed) { 3307 return false; 3308 } 3309 3310 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3311 if (!lookupDirectBufferClasses(env)) { 3312 directBufferSupportInitializeFailed = 1; 3313 return false; 3314 } 3315 3316 // Make global references for these 3317 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3318 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3319 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3320 3321 // Get needed field and method IDs 3322 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3323 if (env->ExceptionCheck()) { 3324 env->ExceptionClear(); 3325 directBufferSupportInitializeFailed = 1; 3326 return false; 3327 } 3328 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3329 if (env->ExceptionCheck()) { 3330 env->ExceptionClear(); 3331 directBufferSupportInitializeFailed = 1; 3332 return false; 3333 } 3334 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3335 if (env->ExceptionCheck()) { 3336 env->ExceptionClear(); 3337 directBufferSupportInitializeFailed = 1; 3338 return false; 3339 } 3340 3341 if ((directByteBufferConstructor == NULL) || 3342 (directBufferAddressField == NULL) || 3343 (bufferCapacityField == NULL)) { 3344 directBufferSupportInitializeFailed = 1; 3345 return false; 3346 } 3347 3348 directBufferSupportInitializeEnded = 1; 3349 } else { 3350 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3351 os::naked_yield(); 3352 } 3353 } 3354 3355 return !directBufferSupportInitializeFailed; 3356 } 3357 3358 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3359 { 3360 // thread_from_jni_environment() will block if VM is gone. 3361 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3362 3363 JNIWrapper("jni_NewDirectByteBuffer"); 3364 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3365 3366 if (!directBufferSupportInitializeEnded) { 3367 if (!initializeDirectBufferSupport(env, thread)) { 3368 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3369 return NULL; 3370 } 3371 } 3372 3373 // Being paranoid about accidental sign extension on address 3374 jlong addr = (jlong) ((uintptr_t) address); 3375 // NOTE that package-private DirectByteBuffer constructor currently 3376 // takes int capacity 3377 jint cap = (jint) capacity; 3378 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3379 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3380 return ret; 3381 } 3382 3383 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3384 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3385 3386 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3387 { 3388 // thread_from_jni_environment() will block if VM is gone. 3389 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3390 3391 JNIWrapper("jni_GetDirectBufferAddress"); 3392 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3393 void* ret = NULL; 3394 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3395 3396 if (!directBufferSupportInitializeEnded) { 3397 if (!initializeDirectBufferSupport(env, thread)) { 3398 return 0; 3399 } 3400 } 3401 3402 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3403 return 0; 3404 } 3405 3406 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3407 return ret; 3408 } 3409 3410 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3411 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3412 3413 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3414 { 3415 // thread_from_jni_environment() will block if VM is gone. 3416 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3417 3418 JNIWrapper("jni_GetDirectBufferCapacity"); 3419 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3420 jlong ret = -1; 3421 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3422 3423 if (!directBufferSupportInitializeEnded) { 3424 if (!initializeDirectBufferSupport(env, thread)) { 3425 ret = 0; 3426 return ret; 3427 } 3428 } 3429 3430 if (buf == NULL) { 3431 return -1; 3432 } 3433 3434 if (!env->IsInstanceOf(buf, directBufferClass)) { 3435 return -1; 3436 } 3437 3438 // NOTE that capacity is currently an int in the implementation 3439 ret = env->GetIntField(buf, bufferCapacityField); 3440 return ret; 3441 } 3442 3443 3444 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3445 JNIWrapper("GetVersion"); 3446 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3447 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3448 return CurrentVersion; 3449 JNI_END 3450 3451 extern struct JavaVM_ main_vm; 3452 3453 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3454 JNIWrapper("jni_GetJavaVM"); 3455 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3456 *vm = (JavaVM *)(&main_vm); 3457 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3458 return JNI_OK; 3459 JNI_END 3460 3461 3462 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3463 JNIWrapper("GetModule"); 3464 return Modules::get_module(clazz, THREAD); 3465 JNI_END 3466 3467 3468 // Structure containing all jni functions 3469 struct JNINativeInterface_ jni_NativeInterface = { 3470 NULL, 3471 NULL, 3472 NULL, 3473 3474 NULL, 3475 3476 jni_GetVersion, 3477 3478 jni_DefineClass, 3479 jni_FindClass, 3480 3481 jni_FromReflectedMethod, 3482 jni_FromReflectedField, 3483 3484 jni_ToReflectedMethod, 3485 3486 jni_GetSuperclass, 3487 jni_IsAssignableFrom, 3488 3489 jni_ToReflectedField, 3490 3491 jni_Throw, 3492 jni_ThrowNew, 3493 jni_ExceptionOccurred, 3494 jni_ExceptionDescribe, 3495 jni_ExceptionClear, 3496 jni_FatalError, 3497 3498 jni_PushLocalFrame, 3499 jni_PopLocalFrame, 3500 3501 jni_NewGlobalRef, 3502 jni_DeleteGlobalRef, 3503 jni_DeleteLocalRef, 3504 jni_IsSameObject, 3505 3506 jni_NewLocalRef, 3507 jni_EnsureLocalCapacity, 3508 3509 jni_AllocObject, 3510 jni_NewObject, 3511 jni_NewObjectV, 3512 jni_NewObjectA, 3513 3514 jni_GetObjectClass, 3515 jni_IsInstanceOf, 3516 3517 jni_GetMethodID, 3518 3519 jni_CallObjectMethod, 3520 jni_CallObjectMethodV, 3521 jni_CallObjectMethodA, 3522 jni_CallBooleanMethod, 3523 jni_CallBooleanMethodV, 3524 jni_CallBooleanMethodA, 3525 jni_CallByteMethod, 3526 jni_CallByteMethodV, 3527 jni_CallByteMethodA, 3528 jni_CallCharMethod, 3529 jni_CallCharMethodV, 3530 jni_CallCharMethodA, 3531 jni_CallShortMethod, 3532 jni_CallShortMethodV, 3533 jni_CallShortMethodA, 3534 jni_CallIntMethod, 3535 jni_CallIntMethodV, 3536 jni_CallIntMethodA, 3537 jni_CallLongMethod, 3538 jni_CallLongMethodV, 3539 jni_CallLongMethodA, 3540 jni_CallFloatMethod, 3541 jni_CallFloatMethodV, 3542 jni_CallFloatMethodA, 3543 jni_CallDoubleMethod, 3544 jni_CallDoubleMethodV, 3545 jni_CallDoubleMethodA, 3546 jni_CallVoidMethod, 3547 jni_CallVoidMethodV, 3548 jni_CallVoidMethodA, 3549 3550 jni_CallNonvirtualObjectMethod, 3551 jni_CallNonvirtualObjectMethodV, 3552 jni_CallNonvirtualObjectMethodA, 3553 jni_CallNonvirtualBooleanMethod, 3554 jni_CallNonvirtualBooleanMethodV, 3555 jni_CallNonvirtualBooleanMethodA, 3556 jni_CallNonvirtualByteMethod, 3557 jni_CallNonvirtualByteMethodV, 3558 jni_CallNonvirtualByteMethodA, 3559 jni_CallNonvirtualCharMethod, 3560 jni_CallNonvirtualCharMethodV, 3561 jni_CallNonvirtualCharMethodA, 3562 jni_CallNonvirtualShortMethod, 3563 jni_CallNonvirtualShortMethodV, 3564 jni_CallNonvirtualShortMethodA, 3565 jni_CallNonvirtualIntMethod, 3566 jni_CallNonvirtualIntMethodV, 3567 jni_CallNonvirtualIntMethodA, 3568 jni_CallNonvirtualLongMethod, 3569 jni_CallNonvirtualLongMethodV, 3570 jni_CallNonvirtualLongMethodA, 3571 jni_CallNonvirtualFloatMethod, 3572 jni_CallNonvirtualFloatMethodV, 3573 jni_CallNonvirtualFloatMethodA, 3574 jni_CallNonvirtualDoubleMethod, 3575 jni_CallNonvirtualDoubleMethodV, 3576 jni_CallNonvirtualDoubleMethodA, 3577 jni_CallNonvirtualVoidMethod, 3578 jni_CallNonvirtualVoidMethodV, 3579 jni_CallNonvirtualVoidMethodA, 3580 3581 jni_GetFieldID, 3582 3583 jni_GetObjectField, 3584 jni_GetBooleanField, 3585 jni_GetByteField, 3586 jni_GetCharField, 3587 jni_GetShortField, 3588 jni_GetIntField, 3589 jni_GetLongField, 3590 jni_GetFloatField, 3591 jni_GetDoubleField, 3592 3593 jni_SetObjectField, 3594 jni_SetBooleanField, 3595 jni_SetByteField, 3596 jni_SetCharField, 3597 jni_SetShortField, 3598 jni_SetIntField, 3599 jni_SetLongField, 3600 jni_SetFloatField, 3601 jni_SetDoubleField, 3602 3603 jni_GetStaticMethodID, 3604 3605 jni_CallStaticObjectMethod, 3606 jni_CallStaticObjectMethodV, 3607 jni_CallStaticObjectMethodA, 3608 jni_CallStaticBooleanMethod, 3609 jni_CallStaticBooleanMethodV, 3610 jni_CallStaticBooleanMethodA, 3611 jni_CallStaticByteMethod, 3612 jni_CallStaticByteMethodV, 3613 jni_CallStaticByteMethodA, 3614 jni_CallStaticCharMethod, 3615 jni_CallStaticCharMethodV, 3616 jni_CallStaticCharMethodA, 3617 jni_CallStaticShortMethod, 3618 jni_CallStaticShortMethodV, 3619 jni_CallStaticShortMethodA, 3620 jni_CallStaticIntMethod, 3621 jni_CallStaticIntMethodV, 3622 jni_CallStaticIntMethodA, 3623 jni_CallStaticLongMethod, 3624 jni_CallStaticLongMethodV, 3625 jni_CallStaticLongMethodA, 3626 jni_CallStaticFloatMethod, 3627 jni_CallStaticFloatMethodV, 3628 jni_CallStaticFloatMethodA, 3629 jni_CallStaticDoubleMethod, 3630 jni_CallStaticDoubleMethodV, 3631 jni_CallStaticDoubleMethodA, 3632 jni_CallStaticVoidMethod, 3633 jni_CallStaticVoidMethodV, 3634 jni_CallStaticVoidMethodA, 3635 3636 jni_GetStaticFieldID, 3637 3638 jni_GetStaticObjectField, 3639 jni_GetStaticBooleanField, 3640 jni_GetStaticByteField, 3641 jni_GetStaticCharField, 3642 jni_GetStaticShortField, 3643 jni_GetStaticIntField, 3644 jni_GetStaticLongField, 3645 jni_GetStaticFloatField, 3646 jni_GetStaticDoubleField, 3647 3648 jni_SetStaticObjectField, 3649 jni_SetStaticBooleanField, 3650 jni_SetStaticByteField, 3651 jni_SetStaticCharField, 3652 jni_SetStaticShortField, 3653 jni_SetStaticIntField, 3654 jni_SetStaticLongField, 3655 jni_SetStaticFloatField, 3656 jni_SetStaticDoubleField, 3657 3658 jni_NewString, 3659 jni_GetStringLength, 3660 jni_GetStringChars, 3661 jni_ReleaseStringChars, 3662 3663 jni_NewStringUTF, 3664 jni_GetStringUTFLength, 3665 jni_GetStringUTFChars, 3666 jni_ReleaseStringUTFChars, 3667 3668 jni_GetArrayLength, 3669 3670 jni_NewObjectArray, 3671 jni_GetObjectArrayElement, 3672 jni_SetObjectArrayElement, 3673 3674 jni_NewBooleanArray, 3675 jni_NewByteArray, 3676 jni_NewCharArray, 3677 jni_NewShortArray, 3678 jni_NewIntArray, 3679 jni_NewLongArray, 3680 jni_NewFloatArray, 3681 jni_NewDoubleArray, 3682 3683 jni_GetBooleanArrayElements, 3684 jni_GetByteArrayElements, 3685 jni_GetCharArrayElements, 3686 jni_GetShortArrayElements, 3687 jni_GetIntArrayElements, 3688 jni_GetLongArrayElements, 3689 jni_GetFloatArrayElements, 3690 jni_GetDoubleArrayElements, 3691 3692 jni_ReleaseBooleanArrayElements, 3693 jni_ReleaseByteArrayElements, 3694 jni_ReleaseCharArrayElements, 3695 jni_ReleaseShortArrayElements, 3696 jni_ReleaseIntArrayElements, 3697 jni_ReleaseLongArrayElements, 3698 jni_ReleaseFloatArrayElements, 3699 jni_ReleaseDoubleArrayElements, 3700 3701 jni_GetBooleanArrayRegion, 3702 jni_GetByteArrayRegion, 3703 jni_GetCharArrayRegion, 3704 jni_GetShortArrayRegion, 3705 jni_GetIntArrayRegion, 3706 jni_GetLongArrayRegion, 3707 jni_GetFloatArrayRegion, 3708 jni_GetDoubleArrayRegion, 3709 3710 jni_SetBooleanArrayRegion, 3711 jni_SetByteArrayRegion, 3712 jni_SetCharArrayRegion, 3713 jni_SetShortArrayRegion, 3714 jni_SetIntArrayRegion, 3715 jni_SetLongArrayRegion, 3716 jni_SetFloatArrayRegion, 3717 jni_SetDoubleArrayRegion, 3718 3719 jni_RegisterNatives, 3720 jni_UnregisterNatives, 3721 3722 jni_MonitorEnter, 3723 jni_MonitorExit, 3724 3725 jni_GetJavaVM, 3726 3727 jni_GetStringRegion, 3728 jni_GetStringUTFRegion, 3729 3730 jni_GetPrimitiveArrayCritical, 3731 jni_ReleasePrimitiveArrayCritical, 3732 3733 jni_GetStringCritical, 3734 jni_ReleaseStringCritical, 3735 3736 jni_NewWeakGlobalRef, 3737 jni_DeleteWeakGlobalRef, 3738 3739 jni_ExceptionCheck, 3740 3741 jni_NewDirectByteBuffer, 3742 jni_GetDirectBufferAddress, 3743 jni_GetDirectBufferCapacity, 3744 3745 // New 1_6 features 3746 3747 jni_GetObjectRefType, 3748 3749 // Module features 3750 3751 jni_GetModule 3752 }; 3753 3754 3755 // For jvmti use to modify jni function table. 3756 // Java threads in native contiues to run until it is transitioned 3757 // to VM at safepoint. Before the transition or before it is blocked 3758 // for safepoint it may access jni function table. VM could crash if 3759 // any java thread access the jni function table in the middle of memcpy. 3760 // To avoid this each function pointers are copied automically. 3761 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3762 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3763 intptr_t *a = (intptr_t *) jni_functions(); 3764 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3765 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3766 Atomic::store_ptr(*b++, a++); 3767 } 3768 } 3769 3770 void quicken_jni_functions() { 3771 // Replace Get<Primitive>Field with fast versions 3772 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3773 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3774 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3775 // windows x86 currently needs SEH wrapper and the gain of the fast 3776 // versions currently isn't certain for server vm on uniprocessor. 3777 && os::is_MP() 3778 #endif 3779 ) { 3780 address func; 3781 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3782 if (func != (address)-1) { 3783 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3784 } 3785 func = JNI_FastGetField::generate_fast_get_byte_field(); 3786 if (func != (address)-1) { 3787 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3788 } 3789 func = JNI_FastGetField::generate_fast_get_char_field(); 3790 if (func != (address)-1) { 3791 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3792 } 3793 func = JNI_FastGetField::generate_fast_get_short_field(); 3794 if (func != (address)-1) { 3795 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3796 } 3797 func = JNI_FastGetField::generate_fast_get_int_field(); 3798 if (func != (address)-1) { 3799 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3800 } 3801 func = JNI_FastGetField::generate_fast_get_long_field(); 3802 if (func != (address)-1) { 3803 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3804 } 3805 func = JNI_FastGetField::generate_fast_get_float_field(); 3806 if (func != (address)-1) { 3807 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3808 } 3809 func = JNI_FastGetField::generate_fast_get_double_field(); 3810 if (func != (address)-1) { 3811 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3812 } 3813 } 3814 } 3815 3816 // Returns the function structure 3817 struct JNINativeInterface_* jni_functions() { 3818 #if INCLUDE_JNI_CHECK 3819 if (CheckJNICalls) return jni_functions_check(); 3820 #endif // INCLUDE_JNI_CHECK 3821 return &jni_NativeInterface; 3822 } 3823 3824 // Returns the function structure 3825 struct JNINativeInterface_* jni_functions_nocheck() { 3826 return &jni_NativeInterface; 3827 } 3828 3829 3830 // Invocation API 3831 3832 3833 // Forward declaration 3834 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3835 3836 // Global invocation API vars 3837 volatile jint vm_created = 0; 3838 // Indicate whether it is safe to recreate VM 3839 volatile jint safe_to_recreate_vm = 1; 3840 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3841 3842 3843 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3844 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3845 3846 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3847 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3848 3849 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3850 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3851 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3852 jint ret = JNI_ERR; 3853 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3854 3855 if (Threads::is_supported_jni_version(args->version)) { 3856 ret = JNI_OK; 3857 } 3858 // 1.1 style no longer supported in hotspot. 3859 // According the JNI spec, we should update args->version on return. 3860 // We also use the structure to communicate with launcher about default 3861 // stack size. 3862 if (args->version == JNI_VERSION_1_1) { 3863 args->version = JNI_VERSION_1_2; 3864 // javaStackSize is int in arguments structure 3865 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3866 args->javaStackSize = (jint)(ThreadStackSize * K); 3867 } 3868 return ret; 3869 } 3870 3871 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3872 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3873 3874 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3875 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3876 3877 jint result = JNI_ERR; 3878 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3879 3880 // We're about to use Atomic::xchg for synchronization. Some Zero 3881 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3882 // but __sync_lock_test_and_set is not guaranteed to do what we want 3883 // on all architectures. So we check it works before relying on it. 3884 #if defined(ZERO) && defined(ASSERT) 3885 { 3886 jint a = 0xcafebabe; 3887 jint b = Atomic::xchg(0xdeadbeef, &a); 3888 void *c = &a; 3889 void *d = Atomic::xchg_ptr(&b, &c); 3890 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3891 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3892 } 3893 #endif // ZERO && ASSERT 3894 3895 // At the moment it's only possible to have one Java VM, 3896 // since some of the runtime state is in global variables. 3897 3898 // We cannot use our mutex locks here, since they only work on 3899 // Threads. We do an atomic compare and exchange to ensure only 3900 // one thread can call this method at a time 3901 3902 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3903 // the add/dec implementations are dependent on whether we are running 3904 // on a multiprocessor, and at this stage of initialization the os::is_MP 3905 // function used to determine this will always return false. Atomic::xchg 3906 // does not have this problem. 3907 if (Atomic::xchg(1, &vm_created) == 1) { 3908 return JNI_EEXIST; // already created, or create attempt in progress 3909 } 3910 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3911 return JNI_ERR; // someone tried and failed and retry not allowed. 3912 } 3913 3914 assert(vm_created == 1, "vm_created is true during the creation"); 3915 3916 /** 3917 * Certain errors during initialization are recoverable and do not 3918 * prevent this method from being called again at a later time 3919 * (perhaps with different arguments). However, at a certain 3920 * point during initialization if an error occurs we cannot allow 3921 * this function to be called again (or it will crash). In those 3922 * situations, the 'canTryAgain' flag is set to false, which atomically 3923 * sets safe_to_recreate_vm to 1, such that any new call to 3924 * JNI_CreateJavaVM will immediately fail using the above logic. 3925 */ 3926 bool can_try_again = true; 3927 3928 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3929 if (result == JNI_OK) { 3930 JavaThread *thread = JavaThread::current(); 3931 assert(!thread->has_pending_exception(), "should have returned not OK"); 3932 /* thread is thread_in_vm here */ 3933 *vm = (JavaVM *)(&main_vm); 3934 *(JNIEnv**)penv = thread->jni_environment(); 3935 3936 #if INCLUDE_JVMCI 3937 if (EnableJVMCI) { 3938 if (UseJVMCICompiler) { 3939 // JVMCI is initialized on a CompilerThread 3940 if (BootstrapJVMCI) { 3941 JavaThread* THREAD = thread; 3942 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3943 compiler->bootstrap(THREAD); 3944 if (HAS_PENDING_EXCEPTION) { 3945 HandleMark hm; 3946 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3947 } 3948 } 3949 } 3950 } 3951 #endif 3952 3953 // Tracks the time application was running before GC 3954 RuntimeService::record_application_start(); 3955 3956 // Notify JVMTI 3957 if (JvmtiExport::should_post_thread_life()) { 3958 JvmtiExport::post_thread_start(thread); 3959 } 3960 3961 EventThreadStart event; 3962 if (event.should_commit()) { 3963 event.set_thread(THREAD_TRACE_ID(thread)); 3964 event.commit(); 3965 } 3966 3967 #ifndef PRODUCT 3968 // Check if we should compile all classes on bootclasspath 3969 if (CompileTheWorld) ClassLoader::compile_the_world(); 3970 if (ReplayCompiles) ciReplay::replay(thread); 3971 3972 // Some platforms (like Win*) need a wrapper around these test 3973 // functions in order to properly handle error conditions. 3974 test_error_handler(); 3975 if (ExecuteInternalVMTests) { 3976 InternalVMTests::run(); 3977 } 3978 #endif 3979 3980 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3981 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3982 } else { 3983 // If create_vm exits because of a pending exception, exit with that 3984 // exception. In the future when we figure out how to reclaim memory, 3985 // we may be able to exit with JNI_ERR and allow the calling application 3986 // to continue. 3987 if (Universe::is_fully_initialized()) { 3988 // otherwise no pending exception possible - VM will already have aborted 3989 JavaThread* THREAD = JavaThread::current(); 3990 if (HAS_PENDING_EXCEPTION) { 3991 HandleMark hm; 3992 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3993 } 3994 } 3995 3996 if (can_try_again) { 3997 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3998 safe_to_recreate_vm = 1; 3999 } 4000 4001 // Creation failed. We must reset vm_created 4002 *vm = 0; 4003 *(JNIEnv**)penv = 0; 4004 // reset vm_created last to avoid race condition. Use OrderAccess to 4005 // control both compiler and architectural-based reordering. 4006 OrderAccess::release_store(&vm_created, 0); 4007 } 4008 4009 // Flush stdout and stderr before exit. 4010 fflush(stdout); 4011 fflush(stderr); 4012 4013 return result; 4014 4015 } 4016 4017 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4018 jint result = 0; 4019 // On Windows, let CreateJavaVM run with SEH protection 4020 #ifdef _WIN32 4021 __try { 4022 #endif 4023 result = JNI_CreateJavaVM_inner(vm, penv, args); 4024 #ifdef _WIN32 4025 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4026 // Nothing to do. 4027 } 4028 #endif 4029 return result; 4030 } 4031 4032 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4033 // See bug 4367188, the wrapper can sometimes cause VM crashes 4034 // JNIWrapper("GetCreatedJavaVMs"); 4035 4036 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4037 4038 if (vm_created) { 4039 if (numVMs != NULL) *numVMs = 1; 4040 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4041 } else { 4042 if (numVMs != NULL) *numVMs = 0; 4043 } 4044 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4045 return JNI_OK; 4046 } 4047 4048 extern "C" { 4049 4050 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4051 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4052 4053 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4054 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4055 jint res = JNI_ERR; 4056 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4057 4058 if (!vm_created) { 4059 res = JNI_ERR; 4060 return res; 4061 } 4062 4063 JNIWrapper("DestroyJavaVM"); 4064 JNIEnv *env; 4065 JavaVMAttachArgs destroyargs; 4066 destroyargs.version = CurrentVersion; 4067 destroyargs.name = (char *)"DestroyJavaVM"; 4068 destroyargs.group = NULL; 4069 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4070 if (res != JNI_OK) { 4071 return res; 4072 } 4073 4074 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4075 JavaThread* thread = JavaThread::current(); 4076 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4077 if (Threads::destroy_vm()) { 4078 // Should not change thread state, VM is gone 4079 vm_created = false; 4080 res = JNI_OK; 4081 return res; 4082 } else { 4083 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4084 res = JNI_ERR; 4085 return res; 4086 } 4087 } 4088 4089 4090 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4091 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4092 4093 // Check below commented out from JDK1.2fcs as well 4094 /* 4095 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4096 return JNI_EVERSION; 4097 } 4098 */ 4099 4100 Thread* t = Thread::current_or_null(); 4101 if (t != NULL) { 4102 // If the thread has been attached this operation is a no-op 4103 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4104 return JNI_OK; 4105 } 4106 4107 // Create a thread and mark it as attaching so it will be skipped by the 4108 // ThreadsListEnumerator - see CR 6404306 4109 JavaThread* thread = new JavaThread(true); 4110 4111 // Set correct safepoint info. The thread is going to call into Java when 4112 // initializing the Java level thread object. Hence, the correct state must 4113 // be set in order for the Safepoint code to deal with it correctly. 4114 thread->set_thread_state(_thread_in_vm); 4115 thread->record_stack_base_and_size(); 4116 thread->initialize_thread_current(); 4117 4118 if (!os::create_attached_thread(thread)) { 4119 delete thread; 4120 return JNI_ERR; 4121 } 4122 // Enable stack overflow checks 4123 thread->create_stack_guard_pages(); 4124 4125 thread->initialize_tlab(); 4126 4127 thread->cache_global_variables(); 4128 4129 // Crucial that we do not have a safepoint check for this thread, since it has 4130 // not been added to the Thread list yet. 4131 { Threads_lock->lock_without_safepoint_check(); 4132 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4133 // avoid this thread trying to do a GC before it is added to the thread-list 4134 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4135 Threads::add(thread, daemon); 4136 Threads_lock->unlock(); 4137 } 4138 // Create thread group and name info from attach arguments 4139 oop group = NULL; 4140 char* thread_name = NULL; 4141 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4142 group = JNIHandles::resolve(args->group); 4143 thread_name = args->name; // may be NULL 4144 } 4145 if (group == NULL) group = Universe::main_thread_group(); 4146 4147 // Create Java level thread object and attach it to this thread 4148 bool attach_failed = false; 4149 { 4150 EXCEPTION_MARK; 4151 HandleMark hm(THREAD); 4152 Handle thread_group(THREAD, group); 4153 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4154 if (HAS_PENDING_EXCEPTION) { 4155 CLEAR_PENDING_EXCEPTION; 4156 // cleanup outside the handle mark. 4157 attach_failed = true; 4158 } 4159 } 4160 4161 if (attach_failed) { 4162 // Added missing cleanup 4163 thread->cleanup_failed_attach_current_thread(); 4164 return JNI_ERR; 4165 } 4166 4167 // mark the thread as no longer attaching 4168 // this uses a fence to push the change through so we don't have 4169 // to regrab the threads_lock 4170 thread->set_done_attaching_via_jni(); 4171 4172 // Set java thread status. 4173 java_lang_Thread::set_thread_status(thread->threadObj(), 4174 java_lang_Thread::RUNNABLE); 4175 4176 // Notify the debugger 4177 if (JvmtiExport::should_post_thread_life()) { 4178 JvmtiExport::post_thread_start(thread); 4179 } 4180 4181 EventThreadStart event; 4182 if (event.should_commit()) { 4183 event.set_thread(THREAD_TRACE_ID(thread)); 4184 event.commit(); 4185 } 4186 4187 *(JNIEnv**)penv = thread->jni_environment(); 4188 4189 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4190 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4191 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4192 // needed. 4193 4194 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4195 4196 // Perform any platform dependent FPU setup 4197 os::setup_fpu(); 4198 4199 return JNI_OK; 4200 } 4201 4202 4203 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4204 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4205 if (!vm_created) { 4206 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4207 return JNI_ERR; 4208 } 4209 4210 JNIWrapper("AttachCurrentThread"); 4211 jint ret = attach_current_thread(vm, penv, _args, false); 4212 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4213 return ret; 4214 } 4215 4216 4217 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4218 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4219 VM_Exit::block_if_vm_exited(); 4220 4221 JNIWrapper("DetachCurrentThread"); 4222 4223 // If the thread has already been detached the operation is a no-op 4224 if (Thread::current_or_null() == NULL) { 4225 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4226 return JNI_OK; 4227 } 4228 4229 JavaThread* thread = JavaThread::current(); 4230 if (thread->has_last_Java_frame()) { 4231 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4232 // Can't detach a thread that's running java, that can't work. 4233 return JNI_ERR; 4234 } 4235 4236 // Safepoint support. Have to do call-back to safepoint code, if in the 4237 // middel of a safepoint operation 4238 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4239 4240 // XXX: Note that JavaThread::exit() call below removes the guards on the 4241 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4242 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4243 // of the guards is visible in jni_AttachCurrentThread above, 4244 // the removal of the guards is buried below in JavaThread::exit() 4245 // here. The abstraction should be more symmetrically either exposed 4246 // or hidden (e.g. it could probably be hidden in the same 4247 // (platform-dependent) methods where we do alternate stack 4248 // maintenance work?) 4249 thread->exit(false, JavaThread::jni_detach); 4250 delete thread; 4251 4252 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4253 return JNI_OK; 4254 } 4255 4256 DT_RETURN_MARK_DECL(GetEnv, jint 4257 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4258 4259 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4260 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4261 jint ret = JNI_ERR; 4262 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4263 4264 if (!vm_created) { 4265 *penv = NULL; 4266 ret = JNI_EDETACHED; 4267 return ret; 4268 } 4269 4270 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4271 return ret; 4272 } 4273 4274 #ifndef JVMPI_VERSION_1 4275 // need these in order to be polite about older agents 4276 #define JVMPI_VERSION_1 ((jint)0x10000001) 4277 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4278 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4279 #endif // !JVMPI_VERSION_1 4280 4281 Thread* thread = Thread::current_or_null(); 4282 if (thread != NULL && thread->is_Java_thread()) { 4283 if (Threads::is_supported_jni_version_including_1_1(version)) { 4284 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4285 ret = JNI_OK; 4286 return ret; 4287 4288 } else if (version == JVMPI_VERSION_1 || 4289 version == JVMPI_VERSION_1_1 || 4290 version == JVMPI_VERSION_1_2) { 4291 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4292 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4293 ret = JNI_EVERSION; 4294 return ret; 4295 } else if (JvmtiExport::is_jvmdi_version(version)) { 4296 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4297 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4298 ret = JNI_EVERSION; 4299 return ret; 4300 } else { 4301 *penv = NULL; 4302 ret = JNI_EVERSION; 4303 return ret; 4304 } 4305 } else { 4306 *penv = NULL; 4307 ret = JNI_EDETACHED; 4308 return ret; 4309 } 4310 } 4311 4312 4313 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4314 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4315 if (!vm_created) { 4316 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4317 return JNI_ERR; 4318 } 4319 4320 JNIWrapper("AttachCurrentThreadAsDaemon"); 4321 jint ret = attach_current_thread(vm, penv, _args, true); 4322 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4323 return ret; 4324 } 4325 4326 4327 } // End extern "C" 4328 4329 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4330 NULL, 4331 NULL, 4332 NULL, 4333 4334 jni_DestroyJavaVM, 4335 jni_AttachCurrentThread, 4336 jni_DetachCurrentThread, 4337 jni_GetEnv, 4338 jni_AttachCurrentThreadAsDaemon 4339 }; --- EOF ---