1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "jni.h" 28 #include "jvm.h" 29 #include "ci/ciReplay.hpp" 30 #include "classfile/altHashing.hpp" 31 #include "classfile/classFileStream.hpp" 32 #include "classfile/classLoader.hpp" 33 #include "classfile/javaClasses.hpp" 34 #include "classfile/javaClasses.inline.hpp" 35 #include "classfile/modules.hpp" 36 #include "classfile/symbolTable.hpp" 37 #include "classfile/systemDictionary.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "gc/shared/gcLocker.inline.hpp" 40 #include "interpreter/linkResolver.hpp" 41 #include "memory/allocation.hpp" 42 #include "memory/allocation.inline.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.inline.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/instanceOop.hpp" 48 #include "oops/markOop.hpp" 49 #include "oops/method.hpp" 50 #include "oops/objArrayKlass.hpp" 51 #include "oops/objArrayOop.inline.hpp" 52 #include "oops/oop.inline.hpp" 53 #include "oops/symbol.hpp" 54 #include "oops/typeArrayKlass.hpp" 55 #include "oops/typeArrayOop.hpp" 56 #include "prims/jniCheck.hpp" 57 #include "prims/jniExport.hpp" 58 #include "prims/jniFastGetField.hpp" 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/handles.inline.hpp" 66 #include "runtime/interfaceSupport.hpp" 67 #include "runtime/java.hpp" 68 #include "runtime/javaCalls.hpp" 69 #include "runtime/jfieldIDWorkaround.hpp" 70 #include "runtime/orderAccess.inline.hpp" 71 #include "runtime/reflection.hpp" 72 #include "runtime/sharedRuntime.hpp" 73 #include "runtime/signature.hpp" 74 #include "runtime/thread.inline.hpp" 75 #include "runtime/vm_operations.hpp" 76 #include "services/memTracker.hpp" 77 #include "services/runtimeService.hpp" 78 #include "trace/traceMacros.hpp" 79 #include "trace/tracing.hpp" 80 #include "utilities/defaultStream.hpp" 81 #include "utilities/dtrace.hpp" 82 #include "utilities/events.hpp" 83 #include "utilities/histogram.hpp" 84 #include "utilities/internalVMTests.hpp" 85 #include "utilities/macros.hpp" 86 #include "utilities/vmError.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_10; 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 int 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 Exceptions::fthrow(THREAD_AND_LOCATION, 329 vmSymbols::java_lang_NoClassDefFoundError(), 330 "Class name exceeds maximum length of %d: %s", 331 Symbol::max_length(), 332 name); 333 return 0; 334 } 335 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 336 } 337 ResourceMark rm(THREAD); 338 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 340 341 if (UsePerfData && !class_loader.is_null()) { 342 // check whether the current caller thread holds the lock or not. 343 // If not, increment the corresponding counter 344 if (ObjectSynchronizer:: 345 query_lock_ownership((JavaThread*)THREAD, class_loader) != 346 ObjectSynchronizer::owner_self) { 347 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 348 } 349 } 350 Klass* k = SystemDictionary::resolve_from_stream(class_name, 351 class_loader, 352 Handle(), 353 &st, 354 CHECK_NULL); 355 356 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 357 trace_class_resolution(k); 358 } 359 360 cls = (jclass)JNIHandles::make_local( 361 env, k->java_mirror()); 362 return cls; 363 JNI_END 364 365 366 367 static bool first_time_FindClass = true; 368 369 DT_RETURN_MARK_DECL(FindClass, jclass 370 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 371 372 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 373 JNIWrapper("FindClass"); 374 375 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 376 377 jclass result = NULL; 378 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 379 380 // Remember if we are the first invocation of jni_FindClass 381 bool first_time = first_time_FindClass; 382 first_time_FindClass = false; 383 384 // Sanity check the name: it cannot be null or larger than the maximum size 385 // name we can fit in the constant pool. 386 if (name == NULL) { 387 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 388 } 389 if ((int)strlen(name) > Symbol::max_length()) { 390 Exceptions::fthrow(THREAD_AND_LOCATION, 391 vmSymbols::java_lang_NoClassDefFoundError(), 392 "Class name exceeds maximum length of %d: %s", 393 Symbol::max_length(), 394 name); 395 return 0; 396 } 397 398 //%note jni_3 399 Handle protection_domain; 400 // Find calling class 401 Klass* k = thread->security_get_caller_class(0); 402 // default to the system loader when no context 403 Handle loader(THREAD, SystemDictionary::java_system_loader()); 404 if (k != NULL) { 405 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 406 // in the correct class context. 407 if (k->class_loader() == NULL && 408 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 409 JavaValue result(T_OBJECT); 410 JavaCalls::call_static(&result, k, 411 vmSymbols::getFromClass_name(), 412 vmSymbols::void_class_signature(), 413 CHECK_NULL); 414 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 415 // a non-NULL Class object. When invoked from JNI_OnUnload, 416 // it will return NULL to indicate no context. 417 oop mirror = (oop) result.get_jobject(); 418 if (mirror != NULL) { 419 Klass* fromClass = java_lang_Class::as_Klass(mirror); 420 loader = Handle(THREAD, fromClass->class_loader()); 421 protection_domain = Handle(THREAD, fromClass->protection_domain()); 422 } 423 } else { 424 loader = Handle(THREAD, k->class_loader()); 425 } 426 } 427 428 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 429 result = find_class_from_class_loader(env, sym, true, loader, 430 protection_domain, true, thread); 431 432 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 433 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 434 } 435 436 // If we were the first invocation of jni_FindClass, we enable compilation again 437 // rather than just allowing invocation counter to overflow and decay. 438 // Controlled by flag DelayCompilationDuringStartup. 439 if (first_time && !CompileTheWorld) 440 CompilationPolicy::completed_vm_startup(); 441 442 return result; 443 JNI_END 444 445 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 446 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 447 448 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 449 JNIWrapper("FromReflectedMethod"); 450 451 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 452 453 jmethodID ret = NULL; 454 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 455 456 // method is a handle to a java.lang.reflect.Method object 457 oop reflected = JNIHandles::resolve_non_null(method); 458 oop mirror = NULL; 459 int slot = 0; 460 461 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 462 mirror = java_lang_reflect_Constructor::clazz(reflected); 463 slot = java_lang_reflect_Constructor::slot(reflected); 464 } else { 465 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 466 mirror = java_lang_reflect_Method::clazz(reflected); 467 slot = java_lang_reflect_Method::slot(reflected); 468 } 469 Klass* k1 = java_lang_Class::as_Klass(mirror); 470 471 // Make sure class is initialized before handing id's out to methods 472 k1->initialize(CHECK_NULL); 473 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 474 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 475 return ret; 476 JNI_END 477 478 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 479 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 480 481 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 482 JNIWrapper("FromReflectedField"); 483 484 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 485 486 jfieldID ret = NULL; 487 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 488 489 // field is a handle to a java.lang.reflect.Field object 490 oop reflected = JNIHandles::resolve_non_null(field); 491 oop mirror = java_lang_reflect_Field::clazz(reflected); 492 Klass* k1 = java_lang_Class::as_Klass(mirror); 493 int slot = java_lang_reflect_Field::slot(reflected); 494 int modifiers = java_lang_reflect_Field::modifiers(reflected); 495 496 // Make sure class is initialized before handing id's out to fields 497 k1->initialize(CHECK_NULL); 498 499 // First check if this is a static field 500 if (modifiers & JVM_ACC_STATIC) { 501 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 502 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 503 assert(id != NULL, "corrupt Field object"); 504 debug_only(id->set_is_static_field_id();) 505 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 506 ret = jfieldIDWorkaround::to_static_jfieldID(id); 507 return ret; 508 } 509 510 // The slot is the index of the field description in the field-array 511 // The jfieldID is the offset of the field within the object 512 // It may also have hash bits for k, if VerifyJNIFields is turned on. 513 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 514 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 515 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 516 return ret; 517 JNI_END 518 519 520 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 521 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 522 523 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 524 JNIWrapper("ToReflectedMethod"); 525 526 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 527 528 jobject ret = NULL; 529 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 530 531 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 532 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 533 oop reflection_method; 534 if (m->is_initializer()) { 535 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 536 } else { 537 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 538 } 539 ret = JNIHandles::make_local(env, reflection_method); 540 return ret; 541 JNI_END 542 543 DT_RETURN_MARK_DECL(GetSuperclass, jclass 544 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 545 546 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 547 JNIWrapper("GetSuperclass"); 548 549 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 550 551 jclass obj = NULL; 552 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 553 554 oop mirror = JNIHandles::resolve_non_null(sub); 555 // primitive classes return NULL 556 if (java_lang_Class::is_primitive(mirror)) return NULL; 557 558 // Rules of Class.getSuperClass as implemented by KLass::java_super: 559 // arrays return Object 560 // interfaces return NULL 561 // proper classes return Klass::super() 562 Klass* k = java_lang_Class::as_Klass(mirror); 563 if (k->is_interface()) return NULL; 564 565 // return mirror for superclass 566 Klass* super = k->java_super(); 567 // super2 is the value computed by the compiler's getSuperClass intrinsic: 568 debug_only(Klass* super2 = ( k->is_array_klass() 569 ? SystemDictionary::Object_klass() 570 : k->super() ) ); 571 assert(super == super2, 572 "java_super computation depends on interface, array, other super"); 573 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 574 return obj; 575 JNI_END 576 577 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 578 JNIWrapper("IsSubclassOf"); 579 580 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 581 582 oop sub_mirror = JNIHandles::resolve_non_null(sub); 583 oop super_mirror = JNIHandles::resolve_non_null(super); 584 if (java_lang_Class::is_primitive(sub_mirror) || 585 java_lang_Class::is_primitive(super_mirror)) { 586 jboolean ret = (sub_mirror == super_mirror); 587 588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 589 return ret; 590 } 591 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 592 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 593 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 594 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 595 JNI_TRUE : JNI_FALSE; 596 597 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 598 return ret; 599 JNI_END 600 601 602 DT_RETURN_MARK_DECL(Throw, jint 603 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 604 605 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 606 JNIWrapper("Throw"); 607 608 HOTSPOT_JNI_THROW_ENTRY(env, obj); 609 610 jint ret = JNI_OK; 611 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 612 613 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 614 ShouldNotReachHere(); 615 return 0; // Mute compiler. 616 JNI_END 617 618 619 DT_RETURN_MARK_DECL(ThrowNew, jint 620 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 621 622 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 623 JNIWrapper("ThrowNew"); 624 625 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 626 627 jint ret = JNI_OK; 628 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 629 630 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 631 Symbol* name = k->name(); 632 Handle class_loader (THREAD, k->class_loader()); 633 Handle protection_domain (THREAD, k->protection_domain()); 634 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 635 ShouldNotReachHere(); 636 return 0; // Mute compiler. 637 JNI_END 638 639 640 // JNI functions only transform a pending async exception to a synchronous 641 // exception in ExceptionOccurred and ExceptionCheck calls, since 642 // delivering an async exception in other places won't change the native 643 // code's control flow and would be harmful when native code further calls 644 // JNI functions with a pending exception. Async exception is also checked 645 // during the call, so ExceptionOccurred/ExceptionCheck won't return 646 // false but deliver the async exception at the very end during 647 // state transition. 648 649 static void jni_check_async_exceptions(JavaThread *thread) { 650 assert(thread == Thread::current(), "must be itself"); 651 thread->check_and_handle_async_exceptions(); 652 } 653 654 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 655 JNIWrapper("ExceptionOccurred"); 656 657 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 658 659 jni_check_async_exceptions(thread); 660 oop exception = thread->pending_exception(); 661 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 662 663 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 664 return ret; 665 JNI_END 666 667 668 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 669 JNIWrapper("ExceptionDescribe"); 670 671 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 672 673 if (thread->has_pending_exception()) { 674 Handle ex(thread, thread->pending_exception()); 675 thread->clear_pending_exception(); 676 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 677 // Don't print anything if we are being killed. 678 } else { 679 jio_fprintf(defaultStream::error_stream(), "Exception "); 680 if (thread != NULL && thread->threadObj() != NULL) { 681 ResourceMark rm(THREAD); 682 jio_fprintf(defaultStream::error_stream(), 683 "in thread \"%s\" ", thread->get_thread_name()); 684 } 685 if (ex->is_a(SystemDictionary::Throwable_klass())) { 686 JavaValue result(T_VOID); 687 JavaCalls::call_virtual(&result, 688 ex, 689 SystemDictionary::Throwable_klass(), 690 vmSymbols::printStackTrace_name(), 691 vmSymbols::void_method_signature(), 692 THREAD); 693 // If an exception is thrown in the call it gets thrown away. Not much 694 // we can do with it. The native code that calls this, does not check 695 // for the exception - hence, it might still be in the thread when DestroyVM gets 696 // called, potentially causing a few asserts to trigger - since no pending exception 697 // is expected. 698 CLEAR_PENDING_EXCEPTION; 699 } else { 700 ResourceMark rm(THREAD); 701 jio_fprintf(defaultStream::error_stream(), 702 ". Uncaught exception of type %s.", 703 ex->klass()->external_name()); 704 } 705 } 706 } 707 708 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 709 JNI_END 710 711 712 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 713 JNIWrapper("ExceptionClear"); 714 715 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 716 717 // The jni code might be using this API to clear java thrown exception. 718 // So just mark jvmti thread exception state as exception caught. 719 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 720 if (state != NULL && state->is_exception_detected()) { 721 state->set_exception_caught(); 722 } 723 thread->clear_pending_exception(); 724 725 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 726 JNI_END 727 728 729 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 730 JNIWrapper("FatalError"); 731 732 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 733 734 tty->print_cr("FATAL ERROR in native method: %s", msg); 735 thread->print_stack(); 736 os::abort(); // Dump core and abort 737 JNI_END 738 739 740 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 741 JNIWrapper("PushLocalFrame"); 742 743 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 744 745 //%note jni_11 746 if (capacity < 0 || 747 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 748 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 749 return JNI_ERR; 750 } 751 JNIHandleBlock* old_handles = thread->active_handles(); 752 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 753 assert(new_handles != NULL, "should not be NULL"); 754 new_handles->set_pop_frame_link(old_handles); 755 thread->set_active_handles(new_handles); 756 jint ret = JNI_OK; 757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 758 return ret; 759 JNI_END 760 761 762 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 763 JNIWrapper("PopLocalFrame"); 764 765 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 766 767 //%note jni_11 768 Handle result_handle(thread, JNIHandles::resolve(result)); 769 JNIHandleBlock* old_handles = thread->active_handles(); 770 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 771 if (new_handles != NULL) { 772 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 773 // This way code will still work if PopLocalFrame is called without a corresponding 774 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 775 // the release_block call will release the blocks. 776 thread->set_active_handles(new_handles); 777 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 778 JNIHandleBlock::release_block(old_handles, thread); // may block 779 result = JNIHandles::make_local(thread, result_handle()); 780 } 781 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 782 return result; 783 JNI_END 784 785 786 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 787 JNIWrapper("NewGlobalRef"); 788 789 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 790 791 Handle ref_handle(thread, JNIHandles::resolve(ref)); 792 jobject ret = JNIHandles::make_global(ref_handle); 793 794 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 795 return ret; 796 JNI_END 797 798 // Must be JNI_ENTRY (with HandleMark) 799 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 800 JNIWrapper("DeleteGlobalRef"); 801 802 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 803 804 JNIHandles::destroy_global(ref); 805 806 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 807 JNI_END 808 809 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 810 JNIWrapper("DeleteLocalRef"); 811 812 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 813 814 JNIHandles::destroy_local(obj); 815 816 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 817 JNI_END 818 819 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 820 JNIWrapper("IsSameObject"); 821 822 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 823 824 oop a = JNIHandles::resolve(r1); 825 oop b = JNIHandles::resolve(r2); 826 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 827 828 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 829 return ret; 830 JNI_END 831 832 833 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 834 JNIWrapper("NewLocalRef"); 835 836 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 837 838 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 839 840 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 841 return ret; 842 JNI_END 843 844 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 845 JNIWrapper("EnsureLocalCapacity"); 846 847 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 848 849 jint ret; 850 if (capacity >= 0 && 851 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 852 ret = JNI_OK; 853 } else { 854 ret = JNI_ERR; 855 } 856 857 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 858 return ret; 859 JNI_END 860 861 // Return the Handle Type 862 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 863 JNIWrapper("GetObjectRefType"); 864 865 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 866 867 jobjectRefType ret; 868 if (JNIHandles::is_local_handle(thread, obj) || 869 JNIHandles::is_frame_handle(thread, obj)) 870 ret = JNILocalRefType; 871 else if (JNIHandles::is_global_handle(obj)) 872 ret = JNIGlobalRefType; 873 else if (JNIHandles::is_weak_global_handle(obj)) 874 ret = JNIWeakGlobalRefType; 875 else 876 ret = JNIInvalidRefType; 877 878 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 879 return ret; 880 JNI_END 881 882 883 class JNI_ArgumentPusher : public SignatureIterator { 884 protected: 885 JavaCallArguments* _arguments; 886 887 virtual void get_bool () = 0; 888 virtual void get_char () = 0; 889 virtual void get_short () = 0; 890 virtual void get_byte () = 0; 891 virtual void get_int () = 0; 892 virtual void get_long () = 0; 893 virtual void get_float () = 0; 894 virtual void get_double () = 0; 895 virtual void get_object () = 0; 896 897 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 898 this->_return_type = T_ILLEGAL; 899 _arguments = NULL; 900 } 901 902 public: 903 virtual void iterate( uint64_t fingerprint ) = 0; 904 905 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 906 907 inline void do_bool() { if (!is_return_type()) get_bool(); } 908 inline void do_char() { if (!is_return_type()) get_char(); } 909 inline void do_short() { if (!is_return_type()) get_short(); } 910 inline void do_byte() { if (!is_return_type()) get_byte(); } 911 inline void do_int() { if (!is_return_type()) get_int(); } 912 inline void do_long() { if (!is_return_type()) get_long(); } 913 inline void do_float() { if (!is_return_type()) get_float(); } 914 inline void do_double() { if (!is_return_type()) get_double(); } 915 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 916 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 917 inline void do_void() { } 918 919 JavaCallArguments* arguments() { return _arguments; } 920 void push_receiver(Handle h) { _arguments->push_oop(h); } 921 }; 922 923 924 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 925 protected: 926 va_list _ap; 927 928 inline void get_bool() { 929 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 930 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 931 // TemplateInterpreterGenerator::generate_result_handler_for and 932 // SharedRuntime::generate_native_wrapper. 933 jboolean b = va_arg(_ap, jint); 934 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 935 } 936 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 937 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 938 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 939 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 940 941 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 942 943 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 944 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 945 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 946 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 947 948 inline void set_ap(va_list rap) { 949 va_copy(_ap, rap); 950 } 951 952 public: 953 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 954 : JNI_ArgumentPusher(signature) { 955 set_ap(rap); 956 } 957 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 958 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 959 set_ap(rap); 960 } 961 962 // Optimized path if we have the bitvector form of signature 963 void iterate( uint64_t fingerprint ) { 964 if (fingerprint == (uint64_t)CONST64(-1)) { 965 SignatureIterator::iterate(); // Must be too many arguments 966 } else { 967 _return_type = (BasicType)((fingerprint >> static_feature_size) & 968 result_feature_mask); 969 970 assert(fingerprint, "Fingerprint should not be 0"); 971 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 972 while ( 1 ) { 973 switch ( fingerprint & parameter_feature_mask ) { 974 case bool_parm: 975 get_bool(); 976 break; 977 case char_parm: 978 get_char(); 979 break; 980 case short_parm: 981 get_short(); 982 break; 983 case byte_parm: 984 get_byte(); 985 break; 986 case int_parm: 987 get_int(); 988 break; 989 case obj_parm: 990 get_object(); 991 break; 992 case long_parm: 993 get_long(); 994 break; 995 case float_parm: 996 get_float(); 997 break; 998 case double_parm: 999 get_double(); 1000 break; 1001 case done_parm: 1002 return; 1003 break; 1004 default: 1005 ShouldNotReachHere(); 1006 break; 1007 } 1008 fingerprint >>= parameter_feature_size; 1009 } 1010 } 1011 } 1012 }; 1013 1014 1015 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1016 protected: 1017 const jvalue *_ap; 1018 1019 inline void get_bool() { 1020 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1021 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1022 // TemplateInterpreterGenerator::generate_result_handler_for and 1023 // SharedRuntime::generate_native_wrapper. 1024 jboolean b = (_ap++)->z; 1025 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1026 } 1027 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1028 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1029 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1030 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1031 1032 inline void get_long() { _arguments->push_long((_ap++)->j); } 1033 inline void get_float() { _arguments->push_float((_ap++)->f); } 1034 inline void get_double() { _arguments->push_double((_ap++)->d);} 1035 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1036 1037 inline void set_ap(const jvalue *rap) { _ap = rap; } 1038 1039 public: 1040 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1041 : JNI_ArgumentPusher(signature) { 1042 set_ap(rap); 1043 } 1044 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1045 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1046 set_ap(rap); 1047 } 1048 1049 // Optimized path if we have the bitvector form of signature 1050 void iterate( uint64_t fingerprint ) { 1051 if (fingerprint == (uint64_t)CONST64(-1)) { 1052 SignatureIterator::iterate(); // Must be too many arguments 1053 } else { 1054 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1055 result_feature_mask); 1056 assert(fingerprint, "Fingerprint should not be 0"); 1057 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1058 while ( 1 ) { 1059 switch ( fingerprint & parameter_feature_mask ) { 1060 case bool_parm: 1061 get_bool(); 1062 break; 1063 case char_parm: 1064 get_char(); 1065 break; 1066 case short_parm: 1067 get_short(); 1068 break; 1069 case byte_parm: 1070 get_byte(); 1071 break; 1072 case int_parm: 1073 get_int(); 1074 break; 1075 case obj_parm: 1076 get_object(); 1077 break; 1078 case long_parm: 1079 get_long(); 1080 break; 1081 case float_parm: 1082 get_float(); 1083 break; 1084 case double_parm: 1085 get_double(); 1086 break; 1087 case done_parm: 1088 return; 1089 break; 1090 default: 1091 ShouldNotReachHere(); 1092 break; 1093 } 1094 fingerprint >>= parameter_feature_size; 1095 } 1096 } 1097 } 1098 }; 1099 1100 1101 enum JNICallType { 1102 JNI_STATIC, 1103 JNI_VIRTUAL, 1104 JNI_NONVIRTUAL 1105 }; 1106 1107 1108 1109 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1110 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1111 1112 // Create object to hold arguments for the JavaCall, and associate it with 1113 // the jni parser 1114 ResourceMark rm(THREAD); 1115 int number_of_parameters = method->size_of_parameters(); 1116 JavaCallArguments java_args(number_of_parameters); 1117 args->set_java_argument_object(&java_args); 1118 1119 assert(method->is_static(), "method should be static"); 1120 1121 // Fill out JavaCallArguments object 1122 args->iterate( Fingerprinter(method).fingerprint() ); 1123 // Initialize result type 1124 result->set_type(args->get_ret_type()); 1125 1126 // Invoke the method. Result is returned as oop. 1127 JavaCalls::call(result, method, &java_args, CHECK); 1128 1129 // Convert result 1130 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1131 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1132 } 1133 } 1134 1135 1136 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1137 oop recv = JNIHandles::resolve(receiver); 1138 if (recv == NULL) { 1139 THROW(vmSymbols::java_lang_NullPointerException()); 1140 } 1141 Handle h_recv(THREAD, recv); 1142 1143 int number_of_parameters; 1144 Method* selected_method; 1145 { 1146 Method* m = Method::resolve_jmethod_id(method_id); 1147 number_of_parameters = m->size_of_parameters(); 1148 Klass* holder = m->method_holder(); 1149 if (call_type != JNI_VIRTUAL) { 1150 selected_method = m; 1151 } else if (!m->has_itable_index()) { 1152 // non-interface call -- for that little speed boost, don't handlize 1153 debug_only(NoSafepointVerifier nosafepoint;) 1154 // jni_GetMethodID makes sure class is linked and initialized 1155 // so m should have a valid vtable index. 1156 assert(m->valid_vtable_index(), "no valid vtable index"); 1157 int vtbl_index = m->vtable_index(); 1158 if (vtbl_index != Method::nonvirtual_vtable_index) { 1159 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1160 } else { 1161 // final method 1162 selected_method = m; 1163 } 1164 } else { 1165 // interface call 1166 int itbl_index = m->itable_index(); 1167 Klass* k = h_recv->klass(); 1168 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1169 } 1170 } 1171 1172 methodHandle method(THREAD, selected_method); 1173 1174 // Create object to hold arguments for the JavaCall, and associate it with 1175 // the jni parser 1176 ResourceMark rm(THREAD); 1177 JavaCallArguments java_args(number_of_parameters); 1178 args->set_java_argument_object(&java_args); 1179 1180 // handle arguments 1181 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1182 args->push_receiver(h_recv); // Push jobject handle 1183 1184 // Fill out JavaCallArguments object 1185 args->iterate( Fingerprinter(method).fingerprint() ); 1186 // Initialize result type 1187 result->set_type(args->get_ret_type()); 1188 1189 // Invoke the method. Result is returned as oop. 1190 JavaCalls::call(result, method, &java_args, CHECK); 1191 1192 // Convert result 1193 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1194 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1195 } 1196 } 1197 1198 1199 static instanceOop alloc_object(jclass clazz, TRAPS) { 1200 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1201 if (k == NULL) { 1202 ResourceMark rm(THREAD); 1203 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1204 } 1205 k->check_valid_for_instantiation(false, CHECK_NULL); 1206 k->initialize(CHECK_NULL); 1207 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1208 return ih; 1209 } 1210 1211 DT_RETURN_MARK_DECL(AllocObject, jobject 1212 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1213 1214 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1215 JNIWrapper("AllocObject"); 1216 1217 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1218 1219 jobject ret = NULL; 1220 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1221 1222 instanceOop i = alloc_object(clazz, CHECK_NULL); 1223 ret = JNIHandles::make_local(env, i); 1224 return ret; 1225 JNI_END 1226 1227 DT_RETURN_MARK_DECL(NewObjectA, jobject 1228 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1229 1230 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1231 JNIWrapper("NewObjectA"); 1232 1233 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1234 1235 jobject obj = NULL; 1236 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1237 1238 instanceOop i = alloc_object(clazz, CHECK_NULL); 1239 obj = JNIHandles::make_local(env, i); 1240 JavaValue jvalue(T_VOID); 1241 JNI_ArgumentPusherArray ap(methodID, args); 1242 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1243 return obj; 1244 JNI_END 1245 1246 1247 DT_RETURN_MARK_DECL(NewObjectV, jobject 1248 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1249 1250 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1251 JNIWrapper("NewObjectV"); 1252 1253 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1254 1255 jobject obj = NULL; 1256 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1257 1258 instanceOop i = alloc_object(clazz, CHECK_NULL); 1259 obj = JNIHandles::make_local(env, i); 1260 JavaValue jvalue(T_VOID); 1261 JNI_ArgumentPusherVaArg ap(methodID, args); 1262 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1263 return obj; 1264 JNI_END 1265 1266 1267 DT_RETURN_MARK_DECL(NewObject, jobject 1268 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1269 1270 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1271 JNIWrapper("NewObject"); 1272 1273 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1274 1275 jobject obj = NULL; 1276 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1277 1278 instanceOop i = alloc_object(clazz, CHECK_NULL); 1279 obj = JNIHandles::make_local(env, i); 1280 va_list args; 1281 va_start(args, methodID); 1282 JavaValue jvalue(T_VOID); 1283 JNI_ArgumentPusherVaArg ap(methodID, args); 1284 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1285 va_end(args); 1286 return obj; 1287 JNI_END 1288 1289 1290 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1291 JNIWrapper("GetObjectClass"); 1292 1293 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1294 1295 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1296 jclass ret = 1297 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1298 1299 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1300 return ret; 1301 JNI_END 1302 1303 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1304 JNIWrapper("IsInstanceOf"); 1305 1306 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1307 1308 jboolean ret = JNI_TRUE; 1309 if (obj != NULL) { 1310 ret = JNI_FALSE; 1311 Klass* k = java_lang_Class::as_Klass( 1312 JNIHandles::resolve_non_null(clazz)); 1313 if (k != NULL) { 1314 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1315 } 1316 } 1317 1318 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1319 return ret; 1320 JNI_END 1321 1322 1323 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1324 const char *sig, bool is_static, TRAPS) { 1325 // %%%% This code should probably just call into a method in the LinkResolver 1326 // 1327 // The class should have been loaded (we have an instance of the class 1328 // passed in) so the method and signature should already be in the symbol 1329 // table. If they're not there, the method doesn't exist. 1330 const char *name_to_probe = (name_str == NULL) 1331 ? vmSymbols::object_initializer_name()->as_C_string() 1332 : name_str; 1333 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1334 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1335 1336 if (name == NULL || signature == NULL) { 1337 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1338 } 1339 1340 // Throw a NoSuchMethodError exception if we have an instance of a 1341 // primitive java.lang.Class 1342 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1343 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1344 } 1345 1346 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1347 1348 // Make sure class is linked and initialized before handing id's out to 1349 // Method*s. 1350 klass->initialize(CHECK_NULL); 1351 1352 Method* m; 1353 if (name == vmSymbols::object_initializer_name() || 1354 name == vmSymbols::class_initializer_name()) { 1355 // Never search superclasses for constructors 1356 if (klass->is_instance_klass()) { 1357 m = InstanceKlass::cast(klass)->find_method(name, signature); 1358 } else { 1359 m = NULL; 1360 } 1361 } else { 1362 m = klass->lookup_method(name, signature); 1363 if (m == NULL && klass->is_instance_klass()) { 1364 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1365 } 1366 } 1367 if (m == NULL || (m->is_static() != is_static)) { 1368 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1369 } 1370 return m->jmethod_id(); 1371 } 1372 1373 1374 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1375 const char *name, const char *sig)) 1376 JNIWrapper("GetMethodID"); 1377 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1378 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1379 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1380 return ret; 1381 JNI_END 1382 1383 1384 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1385 const char *name, const char *sig)) 1386 JNIWrapper("GetStaticMethodID"); 1387 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1388 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1389 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1390 return ret; 1391 JNI_END 1392 1393 1394 1395 // 1396 // Calling Methods 1397 // 1398 1399 1400 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1401 , EntryProbe, ReturnProbe) \ 1402 \ 1403 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1404 , ReturnProbe); \ 1405 \ 1406 JNI_ENTRY(ResultType, \ 1407 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1408 JNIWrapper("Call" XSTR(Result) "Method"); \ 1409 \ 1410 EntryProbe; \ 1411 ResultType ret = 0;\ 1412 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1413 (const ResultType&)ret);\ 1414 \ 1415 va_list args; \ 1416 va_start(args, methodID); \ 1417 JavaValue jvalue(Tag); \ 1418 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1419 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1420 va_end(args); \ 1421 ret = jvalue.get_##ResultType(); \ 1422 return ret;\ 1423 JNI_END 1424 1425 // the runtime type of subword integral basic types is integer 1426 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1427 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1428 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1429 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1430 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1431 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1432 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1433 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1434 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1435 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1436 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1438 1439 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1440 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1441 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1442 DEFINE_CALLMETHOD(jint, Int, T_INT, 1443 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1444 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1445 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1446 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1447 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1448 // Float and double probes don't return value because dtrace doesn't currently support it 1449 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1450 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1451 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1452 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1453 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1454 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1455 1456 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1457 , EntryProbe, ReturnProbe) \ 1458 \ 1459 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1460 , ReturnProbe); \ 1461 \ 1462 JNI_ENTRY(ResultType, \ 1463 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1464 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1465 \ 1466 EntryProbe;\ 1467 ResultType ret = 0;\ 1468 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1469 (const ResultType&)ret);\ 1470 \ 1471 JavaValue jvalue(Tag); \ 1472 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1473 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1474 ret = jvalue.get_##ResultType(); \ 1475 return ret;\ 1476 JNI_END 1477 1478 // the runtime type of subword integral basic types is integer 1479 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1480 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1481 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1482 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1483 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1484 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1485 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1486 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1488 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1489 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1491 1492 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1493 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1494 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1495 DEFINE_CALLMETHODV(jint, Int, T_INT, 1496 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1497 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1498 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1499 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1500 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1501 // Float and double probes don't return value because dtrace doesn't currently support it 1502 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1503 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1504 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1505 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1506 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1507 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1508 1509 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1510 , EntryProbe, ReturnProbe) \ 1511 \ 1512 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1513 , ReturnProbe); \ 1514 \ 1515 JNI_ENTRY(ResultType, \ 1516 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1517 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1518 EntryProbe; \ 1519 ResultType ret = 0;\ 1520 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1521 (const ResultType&)ret);\ 1522 \ 1523 JavaValue jvalue(Tag); \ 1524 JNI_ArgumentPusherArray ap(methodID, args); \ 1525 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1526 ret = jvalue.get_##ResultType(); \ 1527 return ret;\ 1528 JNI_END 1529 1530 // the runtime type of subword integral basic types is integer 1531 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1532 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1533 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1534 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1535 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1537 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1538 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1539 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1540 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1541 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1543 1544 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1545 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1546 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1547 DEFINE_CALLMETHODA(jint, Int, T_INT, 1548 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1549 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1550 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1551 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1552 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1553 // Float and double probes don't return value because dtrace doesn't currently support it 1554 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1555 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1556 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1557 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1558 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1559 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1560 1561 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1562 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1563 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1564 1565 1566 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1567 JNIWrapper("CallVoidMethod"); 1568 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1569 DT_VOID_RETURN_MARK(CallVoidMethod); 1570 1571 va_list args; 1572 va_start(args, methodID); 1573 JavaValue jvalue(T_VOID); 1574 JNI_ArgumentPusherVaArg ap(methodID, args); 1575 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1576 va_end(args); 1577 JNI_END 1578 1579 1580 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1581 JNIWrapper("CallVoidMethodV"); 1582 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1583 DT_VOID_RETURN_MARK(CallVoidMethodV); 1584 1585 JavaValue jvalue(T_VOID); 1586 JNI_ArgumentPusherVaArg ap(methodID, args); 1587 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1588 JNI_END 1589 1590 1591 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1592 JNIWrapper("CallVoidMethodA"); 1593 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1594 DT_VOID_RETURN_MARK(CallVoidMethodA); 1595 1596 JavaValue jvalue(T_VOID); 1597 JNI_ArgumentPusherArray ap(methodID, args); 1598 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1599 JNI_END 1600 1601 1602 1603 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1604 , EntryProbe, ReturnProbe) \ 1605 \ 1606 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1607 , ReturnProbe);\ 1608 \ 1609 JNI_ENTRY(ResultType, \ 1610 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1611 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1612 \ 1613 EntryProbe;\ 1614 ResultType ret;\ 1615 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1616 (const ResultType&)ret);\ 1617 \ 1618 va_list args; \ 1619 va_start(args, methodID); \ 1620 JavaValue jvalue(Tag); \ 1621 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1622 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1623 va_end(args); \ 1624 ret = jvalue.get_##ResultType(); \ 1625 return ret;\ 1626 JNI_END 1627 1628 // the runtime type of subword integral basic types is integer 1629 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1630 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1631 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1632 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1633 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1634 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1635 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1636 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1637 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1638 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1639 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1641 1642 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1643 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1644 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1645 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1646 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1647 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1648 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1649 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1650 // Float and double probes don't return value because dtrace doesn't currently support it 1651 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1652 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1653 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1654 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1655 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1656 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1657 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1658 1659 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1660 , EntryProbe, ReturnProbe) \ 1661 \ 1662 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1663 , ReturnProbe);\ 1664 \ 1665 JNI_ENTRY(ResultType, \ 1666 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1667 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1668 \ 1669 EntryProbe;\ 1670 ResultType ret;\ 1671 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1672 (const ResultType&)ret);\ 1673 \ 1674 JavaValue jvalue(Tag); \ 1675 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1676 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1677 ret = jvalue.get_##ResultType(); \ 1678 return ret;\ 1679 JNI_END 1680 1681 // the runtime type of subword integral basic types is integer 1682 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1683 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1684 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1685 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1686 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1687 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1688 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1689 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1690 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1691 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1692 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1694 1695 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1696 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1697 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1698 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1699 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1700 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1701 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1702 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1703 // Float and double probes don't return value because dtrace doesn't currently support it 1704 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1705 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1706 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1707 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1708 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1709 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1710 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1711 1712 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1713 , EntryProbe, ReturnProbe) \ 1714 \ 1715 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1716 , ReturnProbe);\ 1717 \ 1718 JNI_ENTRY(ResultType, \ 1719 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1720 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1721 \ 1722 EntryProbe;\ 1723 ResultType ret;\ 1724 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1725 (const ResultType&)ret);\ 1726 \ 1727 JavaValue jvalue(Tag); \ 1728 JNI_ArgumentPusherArray ap(methodID, args); \ 1729 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1730 ret = jvalue.get_##ResultType(); \ 1731 return ret;\ 1732 JNI_END 1733 1734 // the runtime type of subword integral basic types is integer 1735 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1736 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1737 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1738 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1739 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1740 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1741 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1742 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1743 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1744 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1745 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1747 1748 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1749 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1750 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1751 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1752 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1753 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1754 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1755 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1756 // Float and double probes don't return value because dtrace doesn't currently support it 1757 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1758 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1759 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1760 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1761 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1762 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1763 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1764 1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1767 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1768 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1769 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1770 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1771 1772 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1773 JNIWrapper("CallNonvirtualVoidMethod"); 1774 1775 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1776 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1777 1778 va_list args; 1779 va_start(args, methodID); 1780 JavaValue jvalue(T_VOID); 1781 JNI_ArgumentPusherVaArg ap(methodID, args); 1782 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1783 va_end(args); 1784 JNI_END 1785 1786 1787 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1788 JNIWrapper("CallNonvirtualVoidMethodV"); 1789 1790 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1791 env, obj, cls, (uintptr_t) methodID); 1792 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1793 1794 JavaValue jvalue(T_VOID); 1795 JNI_ArgumentPusherVaArg ap(methodID, args); 1796 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1797 JNI_END 1798 1799 1800 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1801 JNIWrapper("CallNonvirtualVoidMethodA"); 1802 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1803 env, obj, cls, (uintptr_t) methodID); 1804 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1805 JavaValue jvalue(T_VOID); 1806 JNI_ArgumentPusherArray ap(methodID, args); 1807 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1808 JNI_END 1809 1810 1811 1812 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1813 , EntryProbe, ResultProbe) \ 1814 \ 1815 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1816 , ResultProbe); \ 1817 \ 1818 JNI_ENTRY(ResultType, \ 1819 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1820 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1821 \ 1822 EntryProbe; \ 1823 ResultType ret = 0;\ 1824 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1825 (const ResultType&)ret);\ 1826 \ 1827 va_list args; \ 1828 va_start(args, methodID); \ 1829 JavaValue jvalue(Tag); \ 1830 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1831 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1832 va_end(args); \ 1833 ret = jvalue.get_##ResultType(); \ 1834 return ret;\ 1835 JNI_END 1836 1837 // the runtime type of subword integral basic types is integer 1838 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1839 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1840 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1841 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1842 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1843 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1844 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1845 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1846 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1847 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1848 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1850 1851 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1852 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1853 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1854 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1855 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1856 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1857 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1858 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1859 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1860 // Float and double probes don't return value because dtrace doesn't currently support it 1861 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1862 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1863 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1864 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1865 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1866 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1867 1868 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1869 , EntryProbe, ResultProbe) \ 1870 \ 1871 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1872 , ResultProbe); \ 1873 \ 1874 JNI_ENTRY(ResultType, \ 1875 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1876 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1877 \ 1878 EntryProbe; \ 1879 ResultType ret = 0;\ 1880 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1881 (const ResultType&)ret);\ 1882 \ 1883 JavaValue jvalue(Tag); \ 1884 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1885 /* Make sure class is initialized before trying to invoke its method */ \ 1886 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1887 k->initialize(CHECK_0); \ 1888 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1889 va_end(args); \ 1890 ret = jvalue.get_##ResultType(); \ 1891 return ret;\ 1892 JNI_END 1893 1894 // the runtime type of subword integral basic types is integer 1895 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1896 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1897 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1898 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1899 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1900 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1901 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1902 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1903 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1904 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1905 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1907 1908 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1909 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1910 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1911 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1912 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1913 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1914 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1915 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1916 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1917 // Float and double probes don't return value because dtrace doesn't currently support it 1918 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1919 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1920 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1921 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1922 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1923 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1924 1925 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1926 , EntryProbe, ResultProbe) \ 1927 \ 1928 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1929 , ResultProbe); \ 1930 \ 1931 JNI_ENTRY(ResultType, \ 1932 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1933 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1934 \ 1935 EntryProbe; \ 1936 ResultType ret = 0;\ 1937 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1938 (const ResultType&)ret);\ 1939 \ 1940 JavaValue jvalue(Tag); \ 1941 JNI_ArgumentPusherArray ap(methodID, args); \ 1942 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1943 ret = jvalue.get_##ResultType(); \ 1944 return ret;\ 1945 JNI_END 1946 1947 // the runtime type of subword integral basic types is integer 1948 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1949 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1950 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1951 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1952 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1953 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1954 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1955 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1956 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1957 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1958 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1960 1961 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1962 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1963 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1964 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1965 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1966 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1967 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1968 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1969 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1970 // Float and double probes don't return value because dtrace doesn't currently support it 1971 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1972 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1973 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1974 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1975 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1976 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1977 1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1980 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1981 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1982 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1983 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1984 1985 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1986 JNIWrapper("CallStaticVoidMethod"); 1987 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1988 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1989 1990 va_list args; 1991 va_start(args, methodID); 1992 JavaValue jvalue(T_VOID); 1993 JNI_ArgumentPusherVaArg ap(methodID, args); 1994 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1995 va_end(args); 1996 JNI_END 1997 1998 1999 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 2000 JNIWrapper("CallStaticVoidMethodV"); 2001 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 2002 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 2003 2004 JavaValue jvalue(T_VOID); 2005 JNI_ArgumentPusherVaArg ap(methodID, args); 2006 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2007 JNI_END 2008 2009 2010 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2011 JNIWrapper("CallStaticVoidMethodA"); 2012 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2013 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2014 2015 JavaValue jvalue(T_VOID); 2016 JNI_ArgumentPusherArray ap(methodID, args); 2017 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2018 JNI_END 2019 2020 2021 // 2022 // Accessing Fields 2023 // 2024 2025 2026 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2027 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2028 2029 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2030 const char *name, const char *sig)) 2031 JNIWrapper("GetFieldID"); 2032 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2033 jfieldID ret = 0; 2034 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2035 2036 // The class should have been loaded (we have an instance of the class 2037 // passed in) so the field and signature should already be in the symbol 2038 // table. If they're not there, the field doesn't exist. 2039 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2040 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2041 if (fieldname == NULL || signame == NULL) { 2042 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2043 } 2044 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2045 // Make sure class is initialized before handing id's out to fields 2046 k->initialize(CHECK_NULL); 2047 2048 fieldDescriptor fd; 2049 if (!k->is_instance_klass() || 2050 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2051 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2052 } 2053 2054 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2055 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2056 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2057 return ret; 2058 JNI_END 2059 2060 2061 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2062 JNIWrapper("GetObjectField"); 2063 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2064 oop o = JNIHandles::resolve_non_null(obj); 2065 Klass* k = o->klass(); 2066 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2067 // Keep JVMTI addition small and only check enabled flag here. 2068 // jni_GetField_probe() assumes that is okay to create handles. 2069 if (JvmtiExport::should_post_field_access()) { 2070 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2071 } 2072 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2073 #if INCLUDE_ALL_GCS 2074 // If G1 is enabled and we are accessing the value of the referent 2075 // field in a reference object then we need to register a non-null 2076 // referent with the SATB barrier. 2077 if (UseG1GC) { 2078 bool needs_barrier = false; 2079 2080 if (ret != NULL && 2081 offset == java_lang_ref_Reference::referent_offset && 2082 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2083 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2084 needs_barrier = true; 2085 } 2086 2087 if (needs_barrier) { 2088 oop referent = JNIHandles::resolve(ret); 2089 G1SATBCardTableModRefBS::enqueue(referent); 2090 } 2091 } 2092 #endif // INCLUDE_ALL_GCS 2093 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2094 return ret; 2095 JNI_END 2096 2097 2098 2099 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2100 , EntryProbe, ReturnProbe) \ 2101 \ 2102 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2103 , ReturnProbe); \ 2104 \ 2105 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2106 JNIWrapper("Get" XSTR(Result) "Field"); \ 2107 \ 2108 EntryProbe; \ 2109 Return ret = 0;\ 2110 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2111 \ 2112 oop o = JNIHandles::resolve_non_null(obj); \ 2113 Klass* k = o->klass(); \ 2114 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2115 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2116 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2117 /* and creates a ResetNoHandleMark. */ \ 2118 if (JvmtiExport::should_post_field_access()) { \ 2119 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2120 } \ 2121 ret = o->Fieldname##_field(offset); \ 2122 return ret; \ 2123 JNI_END 2124 2125 DEFINE_GETFIELD(jboolean, bool, Boolean 2126 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2127 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2128 DEFINE_GETFIELD(jbyte, byte, Byte 2129 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2130 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2131 DEFINE_GETFIELD(jchar, char, Char 2132 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2133 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2134 DEFINE_GETFIELD(jshort, short, Short 2135 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2137 DEFINE_GETFIELD(jint, int, Int 2138 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2139 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2140 DEFINE_GETFIELD(jlong, long, Long 2141 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2142 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2143 // Float and double probes don't return value because dtrace doesn't currently support it 2144 DEFINE_GETFIELD(jfloat, float, Float 2145 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2146 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2147 DEFINE_GETFIELD(jdouble, double, Double 2148 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2149 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2150 2151 address jni_GetBooleanField_addr() { 2152 return (address)jni_GetBooleanField; 2153 } 2154 address jni_GetByteField_addr() { 2155 return (address)jni_GetByteField; 2156 } 2157 address jni_GetCharField_addr() { 2158 return (address)jni_GetCharField; 2159 } 2160 address jni_GetShortField_addr() { 2161 return (address)jni_GetShortField; 2162 } 2163 address jni_GetIntField_addr() { 2164 return (address)jni_GetIntField; 2165 } 2166 address jni_GetLongField_addr() { 2167 return (address)jni_GetLongField; 2168 } 2169 address jni_GetFloatField_addr() { 2170 return (address)jni_GetFloatField; 2171 } 2172 address jni_GetDoubleField_addr() { 2173 return (address)jni_GetDoubleField; 2174 } 2175 2176 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2177 JNIWrapper("SetObjectField"); 2178 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2179 oop o = JNIHandles::resolve_non_null(obj); 2180 Klass* k = o->klass(); 2181 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2182 // Keep JVMTI addition small and only check enabled flag here. 2183 // jni_SetField_probe_nh() assumes that is not okay to create handles 2184 // and creates a ResetNoHandleMark. 2185 if (JvmtiExport::should_post_field_modification()) { 2186 jvalue field_value; 2187 field_value.l = value; 2188 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2189 } 2190 o->obj_field_put(offset, JNIHandles::resolve(value)); 2191 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2192 JNI_END 2193 2194 2195 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2196 , EntryProbe, ReturnProbe) \ 2197 \ 2198 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2199 JNIWrapper("Set" XSTR(Result) "Field"); \ 2200 \ 2201 EntryProbe; \ 2202 \ 2203 oop o = JNIHandles::resolve_non_null(obj); \ 2204 Klass* k = o->klass(); \ 2205 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2206 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2207 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2208 /* and creates a ResetNoHandleMark. */ \ 2209 if (JvmtiExport::should_post_field_modification()) { \ 2210 jvalue field_value; \ 2211 field_value.unionType = value; \ 2212 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2213 } \ 2214 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2215 o->Fieldname##_field_put(offset, value); \ 2216 ReturnProbe; \ 2217 JNI_END 2218 2219 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2220 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2221 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2222 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2223 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2224 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2225 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2226 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2227 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2228 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2229 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2230 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2231 DEFINE_SETFIELD(jint, int, Int, 'I', i 2232 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2233 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2234 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2235 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2236 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2237 // Float and double probes don't return value because dtrace doesn't currently support it 2238 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2239 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2240 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2241 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2242 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2243 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2244 2245 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2246 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2247 2248 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2249 JNIWrapper("ToReflectedField"); 2250 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2251 jobject ret = NULL; 2252 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2253 2254 fieldDescriptor fd; 2255 bool found = false; 2256 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2257 2258 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2259 2260 if (isStatic) { 2261 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2262 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2263 assert(id->is_static_field_id(), "invalid static field id"); 2264 found = id->find_local_field(&fd); 2265 } else { 2266 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2267 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2268 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2269 } 2270 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2271 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2272 ret = JNIHandles::make_local(env, reflected); 2273 return ret; 2274 JNI_END 2275 2276 2277 // 2278 // Accessing Static Fields 2279 // 2280 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2281 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2282 2283 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2284 const char *name, const char *sig)) 2285 JNIWrapper("GetStaticFieldID"); 2286 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2287 jfieldID ret = NULL; 2288 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2289 2290 // The class should have been loaded (we have an instance of the class 2291 // passed in) so the field and signature should already be in the symbol 2292 // table. If they're not there, the field doesn't exist. 2293 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2294 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2295 if (fieldname == NULL || signame == NULL) { 2296 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2297 } 2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2299 // Make sure class is initialized before handing id's out to static fields 2300 k->initialize(CHECK_NULL); 2301 2302 fieldDescriptor fd; 2303 if (!k->is_instance_klass() || 2304 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2305 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2306 } 2307 2308 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2309 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2310 debug_only(id->set_is_static_field_id();) 2311 2312 debug_only(id->verify(fd.field_holder())); 2313 2314 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2315 return ret; 2316 JNI_END 2317 2318 2319 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2320 JNIWrapper("GetStaticObjectField"); 2321 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2322 #if INCLUDE_JNI_CHECK 2323 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2324 #endif // INCLUDE_JNI_CHECK 2325 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2326 assert(id->is_static_field_id(), "invalid static field id"); 2327 // Keep JVMTI addition small and only check enabled flag here. 2328 // jni_GetField_probe() assumes that is okay to create handles. 2329 if (JvmtiExport::should_post_field_access()) { 2330 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2331 } 2332 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2333 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2334 return ret; 2335 JNI_END 2336 2337 2338 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2339 , EntryProbe, ReturnProbe) \ 2340 \ 2341 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2342 , ReturnProbe); \ 2343 \ 2344 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2345 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2346 EntryProbe; \ 2347 Return ret = 0;\ 2348 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2349 (const Return&)ret);\ 2350 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2351 assert(id->is_static_field_id(), "invalid static field id"); \ 2352 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2353 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2354 if (JvmtiExport::should_post_field_access()) { \ 2355 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2356 } \ 2357 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2358 return ret;\ 2359 JNI_END 2360 2361 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2362 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2363 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2364 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2365 DEFINE_GETSTATICFIELD(jchar, char, Char 2366 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2367 DEFINE_GETSTATICFIELD(jshort, short, Short 2368 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2369 DEFINE_GETSTATICFIELD(jint, int, Int 2370 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2371 DEFINE_GETSTATICFIELD(jlong, long, Long 2372 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2373 // Float and double probes don't return value because dtrace doesn't currently support it 2374 DEFINE_GETSTATICFIELD(jfloat, float, Float 2375 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2376 DEFINE_GETSTATICFIELD(jdouble, double, Double 2377 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2378 2379 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2380 JNIWrapper("SetStaticObjectField"); 2381 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2382 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2383 assert(id->is_static_field_id(), "invalid static field id"); 2384 // Keep JVMTI addition small and only check enabled flag here. 2385 // jni_SetField_probe() assumes that is okay to create handles. 2386 if (JvmtiExport::should_post_field_modification()) { 2387 jvalue field_value; 2388 field_value.l = value; 2389 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2390 } 2391 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2392 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2393 JNI_END 2394 2395 2396 2397 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2398 , EntryProbe, ReturnProbe) \ 2399 \ 2400 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2401 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2402 EntryProbe; \ 2403 \ 2404 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2405 assert(id->is_static_field_id(), "invalid static field id"); \ 2406 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2407 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2408 if (JvmtiExport::should_post_field_modification()) { \ 2409 jvalue field_value; \ 2410 field_value.unionType = value; \ 2411 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2412 } \ 2413 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2414 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2415 ReturnProbe;\ 2416 JNI_END 2417 2418 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2419 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2420 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2421 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2422 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2423 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2424 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2425 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2426 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2427 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2428 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2429 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2430 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2431 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2432 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2433 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2434 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2435 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2436 // Float and double probes don't return value because dtrace doesn't currently support it 2437 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2438 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2439 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2440 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2441 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2442 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2443 2444 // 2445 // String Operations 2446 // 2447 2448 // Unicode Interface 2449 2450 DT_RETURN_MARK_DECL(NewString, jstring 2451 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2452 2453 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2454 JNIWrapper("NewString"); 2455 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2456 jstring ret = NULL; 2457 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2458 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2459 ret = (jstring) JNIHandles::make_local(env, string); 2460 return ret; 2461 JNI_END 2462 2463 2464 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2465 JNIWrapper("GetStringLength"); 2466 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2467 jsize ret = 0; 2468 oop s = JNIHandles::resolve_non_null(string); 2469 if (java_lang_String::value(s) != NULL) { 2470 ret = java_lang_String::length(s); 2471 } 2472 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2473 return ret; 2474 JNI_END 2475 2476 2477 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2478 JNIEnv *env, jstring string, jboolean *isCopy)) 2479 JNIWrapper("GetStringChars"); 2480 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2481 jchar* buf = NULL; 2482 oop s = JNIHandles::resolve_non_null(string); 2483 typeArrayOop s_value = java_lang_String::value(s); 2484 if (s_value != NULL) { 2485 int s_len = java_lang_String::length(s); 2486 bool is_latin1 = java_lang_String::is_latin1(s); 2487 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2488 /* JNI Specification states return NULL on OOM */ 2489 if (buf != NULL) { 2490 if (s_len > 0) { 2491 if (!is_latin1) { 2492 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2493 } else { 2494 for (int i = 0; i < s_len; i++) { 2495 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2496 } 2497 } 2498 } 2499 buf[s_len] = 0; 2500 //%note jni_5 2501 if (isCopy != NULL) { 2502 *isCopy = JNI_TRUE; 2503 } 2504 } 2505 } 2506 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2507 return buf; 2508 JNI_END 2509 2510 2511 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2512 JNIWrapper("ReleaseStringChars"); 2513 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2514 //%note jni_6 2515 if (chars != NULL) { 2516 // Since String objects are supposed to be immutable, don't copy any 2517 // new data back. A bad user will have to go after the char array. 2518 FreeHeap((void*) chars); 2519 } 2520 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2521 JNI_END 2522 2523 2524 // UTF Interface 2525 2526 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2527 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2528 2529 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2530 JNIWrapper("NewStringUTF"); 2531 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2532 jstring ret; 2533 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2534 2535 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2536 ret = (jstring) JNIHandles::make_local(env, result); 2537 return ret; 2538 JNI_END 2539 2540 2541 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2542 JNIWrapper("GetStringUTFLength"); 2543 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2544 jsize ret = 0; 2545 oop java_string = JNIHandles::resolve_non_null(string); 2546 if (java_lang_String::value(java_string) != NULL) { 2547 ret = java_lang_String::utf8_length(java_string); 2548 } 2549 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2550 return ret; 2551 JNI_END 2552 2553 2554 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2555 JNIWrapper("GetStringUTFChars"); 2556 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2557 char* result = NULL; 2558 oop java_string = JNIHandles::resolve_non_null(string); 2559 if (java_lang_String::value(java_string) != NULL) { 2560 size_t length = java_lang_String::utf8_length(java_string); 2561 /* JNI Specification states return NULL on OOM */ 2562 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2563 if (result != NULL) { 2564 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2565 if (isCopy != NULL) { 2566 *isCopy = JNI_TRUE; 2567 } 2568 } 2569 } 2570 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2571 return result; 2572 JNI_END 2573 2574 2575 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2576 JNIWrapper("ReleaseStringUTFChars"); 2577 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2578 if (chars != NULL) { 2579 FreeHeap((char*) chars); 2580 } 2581 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2582 JNI_END 2583 2584 2585 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2586 JNIWrapper("GetArrayLength"); 2587 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2588 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2589 assert(a->is_array(), "must be array"); 2590 jsize ret = a->length(); 2591 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2592 return ret; 2593 JNI_END 2594 2595 2596 // 2597 // Object Array Operations 2598 // 2599 2600 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2601 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2602 2603 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2604 JNIWrapper("NewObjectArray"); 2605 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2606 jobjectArray ret = NULL; 2607 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2608 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2609 Klass* ak = ek->array_klass(CHECK_NULL); 2610 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2611 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2612 oop initial_value = JNIHandles::resolve(initialElement); 2613 if (initial_value != NULL) { // array already initialized with NULL 2614 for (int index = 0; index < length; index++) { 2615 result->obj_at_put(index, initial_value); 2616 } 2617 } 2618 ret = (jobjectArray) JNIHandles::make_local(env, result); 2619 return ret; 2620 JNI_END 2621 2622 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2623 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2624 2625 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2626 JNIWrapper("GetObjectArrayElement"); 2627 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2628 jobject ret = NULL; 2629 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2630 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2631 if (a->is_within_bounds(index)) { 2632 ret = JNIHandles::make_local(env, a->obj_at(index)); 2633 return ret; 2634 } else { 2635 char buf[jintAsStringSize]; 2636 sprintf(buf, "%d", index); 2637 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2638 } 2639 JNI_END 2640 2641 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2642 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2643 2644 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2645 JNIWrapper("SetObjectArrayElement"); 2646 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2647 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2648 2649 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2650 oop v = JNIHandles::resolve(value); 2651 if (a->is_within_bounds(index)) { 2652 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2653 a->obj_at_put(index, v); 2654 } else { 2655 THROW(vmSymbols::java_lang_ArrayStoreException()); 2656 } 2657 } else { 2658 char buf[jintAsStringSize]; 2659 sprintf(buf, "%d", index); 2660 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2661 } 2662 JNI_END 2663 2664 2665 2666 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2667 ,EntryProbe,ReturnProbe) \ 2668 \ 2669 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2670 , ReturnProbe); \ 2671 \ 2672 JNI_ENTRY(Return, \ 2673 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2674 JNIWrapper("New" XSTR(Result) "Array"); \ 2675 EntryProbe; \ 2676 Return ret = NULL;\ 2677 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2678 \ 2679 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2680 ret = (Return) JNIHandles::make_local(env, obj); \ 2681 return ret;\ 2682 JNI_END 2683 2684 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2685 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2686 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2687 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2688 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2689 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2690 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2691 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2692 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2693 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2694 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2695 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2696 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2697 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2698 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2699 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2700 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2701 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2702 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2703 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2704 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2705 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2706 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2707 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2708 2709 // Return an address which will fault if the caller writes to it. 2710 2711 static char* get_bad_address() { 2712 static char* bad_address = NULL; 2713 if (bad_address == NULL) { 2714 size_t size = os::vm_allocation_granularity(); 2715 bad_address = os::reserve_memory(size); 2716 if (bad_address != NULL) { 2717 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2718 /*is_committed*/false); 2719 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2720 } 2721 } 2722 return bad_address; 2723 } 2724 2725 2726 2727 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2728 , EntryProbe, ReturnProbe) \ 2729 \ 2730 JNI_QUICK_ENTRY(ElementType*, \ 2731 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2732 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2733 EntryProbe; \ 2734 /* allocate an chunk of memory in c land */ \ 2735 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2736 ElementType* result; \ 2737 int len = a->length(); \ 2738 if (len == 0) { \ 2739 /* Empty array: legal but useless, can't return NULL. \ 2740 * Return a pointer to something useless. \ 2741 * Avoid asserts in typeArrayOop. */ \ 2742 result = (ElementType*)get_bad_address(); \ 2743 } else { \ 2744 /* JNI Specification states return NULL on OOM */ \ 2745 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2746 if (result != NULL) { \ 2747 /* copy the array to the c chunk */ \ 2748 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2749 if (isCopy) { \ 2750 *isCopy = JNI_TRUE; \ 2751 } \ 2752 } \ 2753 } \ 2754 ReturnProbe; \ 2755 return result; \ 2756 JNI_END 2757 2758 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2759 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2760 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2761 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2762 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2763 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2764 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2765 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2766 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2767 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2768 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2769 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2770 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2771 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2772 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2773 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2774 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2775 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2776 // Float and double probes don't return value because dtrace doesn't currently support it 2777 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2778 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2779 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2780 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2781 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2782 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2783 2784 2785 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2786 , EntryProbe, ReturnProbe);\ 2787 \ 2788 JNI_QUICK_ENTRY(void, \ 2789 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2790 ElementType *buf, jint mode)) \ 2791 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2792 EntryProbe; \ 2793 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2794 int len = a->length(); \ 2795 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2796 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2797 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2798 } \ 2799 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2800 FreeHeap(buf); \ 2801 } \ 2802 } \ 2803 ReturnProbe; \ 2804 JNI_END 2805 2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2807 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2808 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2810 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2811 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2813 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2814 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2816 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2817 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2818 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2819 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2820 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2821 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2822 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2823 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2824 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2825 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2826 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2827 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2828 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2829 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2830 2831 2832 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2833 , EntryProbe, ReturnProbe); \ 2834 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2835 , ReturnProbe); \ 2836 \ 2837 JNI_ENTRY(void, \ 2838 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2839 jsize len, ElementType *buf)) \ 2840 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2841 EntryProbe; \ 2842 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2843 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2844 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2845 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2846 } else { \ 2847 if (len > 0) { \ 2848 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2849 memcpy((u_char*) buf, \ 2850 (u_char*) src->Tag##_at_addr(start), \ 2851 len << sc); \ 2852 } \ 2853 } \ 2854 JNI_END 2855 2856 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2857 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2858 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2859 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2860 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2861 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2862 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2863 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2864 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2865 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2866 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2867 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2868 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2869 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2870 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2871 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2872 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2873 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2874 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2875 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2876 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2877 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2878 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2879 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2880 2881 2882 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2883 , EntryProbe, ReturnProbe); \ 2884 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2885 ,ReturnProbe); \ 2886 \ 2887 JNI_ENTRY(void, \ 2888 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2889 jsize len, const ElementType *buf)) \ 2890 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2891 EntryProbe; \ 2892 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2893 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2894 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2895 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2896 } else { \ 2897 if (len > 0) { \ 2898 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2899 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2900 (u_char*) buf, \ 2901 len << sc); \ 2902 } \ 2903 } \ 2904 JNI_END 2905 2906 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2907 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2908 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2909 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2910 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2911 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2912 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2913 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2914 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2915 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2916 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2917 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2918 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2919 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2920 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2921 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2922 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2923 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2924 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2925 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2926 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2927 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2928 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2929 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2930 2931 2932 // 2933 // Interception of natives 2934 // 2935 2936 // The RegisterNatives call being attempted tried to register with a method that 2937 // is not native. Ask JVM TI what prefixes have been specified. Then check 2938 // to see if the native method is now wrapped with the prefixes. See the 2939 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2940 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2941 #if INCLUDE_JVMTI 2942 ResourceMark rm(THREAD); 2943 Method* method; 2944 int name_len = name->utf8_length(); 2945 char* name_str = name->as_utf8(); 2946 int prefix_count; 2947 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2948 for (int i = 0; i < prefix_count; i++) { 2949 char* prefix = prefixes[i]; 2950 int prefix_len = (int)strlen(prefix); 2951 2952 // try adding this prefix to the method name and see if it matches another method name 2953 int trial_len = name_len + prefix_len; 2954 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2955 strcpy(trial_name_str, prefix); 2956 strcat(trial_name_str, name_str); 2957 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2958 if (trial_name == NULL) { 2959 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2960 } 2961 method = k->lookup_method(trial_name, signature); 2962 if (method == NULL) { 2963 continue; // signature doesn't match, try the next prefix 2964 } 2965 if (method->is_native()) { 2966 method->set_is_prefixed_native(); 2967 return method; // wahoo, we found a prefixed version of the method, return it 2968 } 2969 // found as non-native, so prefix is good, add it, probably just need more prefixes 2970 name_len = trial_len; 2971 name_str = trial_name_str; 2972 } 2973 #endif // INCLUDE_JVMTI 2974 return NULL; // not found 2975 } 2976 2977 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2978 Method* method = k->lookup_method(name, signature); 2979 if (method == NULL) { 2980 ResourceMark rm; 2981 stringStream st; 2982 st.print("Method %s name or signature does not match", 2983 Method::name_and_sig_as_C_string(k, name, signature)); 2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2985 } 2986 if (!method->is_native()) { 2987 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2988 method = find_prefixed_native(k, name, signature, THREAD); 2989 if (method == NULL) { 2990 ResourceMark rm; 2991 stringStream st; 2992 st.print("Method %s is not declared as native", 2993 Method::name_and_sig_as_C_string(k, name, signature)); 2994 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2995 } 2996 } 2997 2998 if (entry != NULL) { 2999 method->set_native_function(entry, 3000 Method::native_bind_event_is_interesting); 3001 } else { 3002 method->clear_native_function(); 3003 } 3004 if (PrintJNIResolving) { 3005 ResourceMark rm(THREAD); 3006 tty->print_cr("[Registering JNI native method %s.%s]", 3007 method->method_holder()->external_name(), 3008 method->name()->as_C_string()); 3009 } 3010 return true; 3011 } 3012 3013 DT_RETURN_MARK_DECL(RegisterNatives, jint 3014 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3015 3016 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3017 const JNINativeMethod *methods, 3018 jint nMethods)) 3019 JNIWrapper("RegisterNatives"); 3020 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3021 jint ret = 0; 3022 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3023 3024 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3025 3026 for (int index = 0; index < nMethods; index++) { 3027 const char* meth_name = methods[index].name; 3028 const char* meth_sig = methods[index].signature; 3029 int meth_name_len = (int)strlen(meth_name); 3030 3031 // The class should have been loaded (we have an instance of the class 3032 // passed in) so the method and signature should already be in the symbol 3033 // table. If they're not there, the method doesn't exist. 3034 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3035 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3036 3037 if (name == NULL || signature == NULL) { 3038 ResourceMark rm; 3039 stringStream st; 3040 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3041 // Must return negative value on failure 3042 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3043 } 3044 3045 bool res = register_native(k, name, signature, 3046 (address) methods[index].fnPtr, THREAD); 3047 if (!res) { 3048 ret = -1; 3049 break; 3050 } 3051 } 3052 return ret; 3053 JNI_END 3054 3055 3056 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3057 JNIWrapper("UnregisterNatives"); 3058 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3059 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3060 //%note jni_2 3061 if (k->is_instance_klass()) { 3062 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3063 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3064 if (m->is_native()) { 3065 m->clear_native_function(); 3066 m->set_signature_handler(NULL); 3067 } 3068 } 3069 } 3070 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3071 return 0; 3072 JNI_END 3073 3074 // 3075 // Monitor functions 3076 // 3077 3078 DT_RETURN_MARK_DECL(MonitorEnter, jint 3079 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3080 3081 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3082 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3083 jint ret = JNI_ERR; 3084 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3085 3086 // If the object is null, we can't do anything with it 3087 if (jobj == NULL) { 3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3089 } 3090 3091 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3092 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3093 ret = JNI_OK; 3094 return ret; 3095 JNI_END 3096 3097 DT_RETURN_MARK_DECL(MonitorExit, jint 3098 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3099 3100 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3101 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3102 jint ret = JNI_ERR; 3103 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3104 3105 // Don't do anything with a null object 3106 if (jobj == NULL) { 3107 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3108 } 3109 3110 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3111 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3112 3113 ret = JNI_OK; 3114 return ret; 3115 JNI_END 3116 3117 // 3118 // Extensions 3119 // 3120 3121 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3122 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3123 3124 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3125 JNIWrapper("GetStringRegion"); 3126 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3127 DT_VOID_RETURN_MARK(GetStringRegion); 3128 oop s = JNIHandles::resolve_non_null(string); 3129 int s_len = java_lang_String::length(s); 3130 if (start < 0 || len < 0 || start + len > s_len) { 3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3132 } else { 3133 if (len > 0) { 3134 typeArrayOop s_value = java_lang_String::value(s); 3135 bool is_latin1 = java_lang_String::is_latin1(s); 3136 if (!is_latin1) { 3137 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3138 } else { 3139 for (int i = 0; i < len; i++) { 3140 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3141 } 3142 } 3143 } 3144 } 3145 JNI_END 3146 3147 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3148 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3149 3150 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3151 JNIWrapper("GetStringUTFRegion"); 3152 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3153 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3154 oop s = JNIHandles::resolve_non_null(string); 3155 int s_len = java_lang_String::length(s); 3156 if (start < 0 || len < 0 || start + len > s_len) { 3157 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3158 } else { 3159 //%note jni_7 3160 if (len > 0) { 3161 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3162 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3163 // as_utf8_string null-terminates the result string 3164 } else { 3165 // JDK null-terminates the buffer even in len is zero 3166 if (buf != NULL) { 3167 buf[0] = 0; 3168 } 3169 } 3170 } 3171 JNI_END 3172 3173 3174 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3175 JNIWrapper("GetPrimitiveArrayCritical"); 3176 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3177 GCLocker::lock_critical(thread); 3178 if (isCopy != NULL) { 3179 *isCopy = JNI_FALSE; 3180 } 3181 oop a = JNIHandles::resolve_non_null(array); 3182 assert(a->is_array(), "just checking"); 3183 BasicType type; 3184 if (a->is_objArray()) { 3185 type = T_OBJECT; 3186 } else { 3187 type = TypeArrayKlass::cast(a->klass())->element_type(); 3188 } 3189 void* ret = arrayOop(a)->base(type); 3190 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3191 return ret; 3192 JNI_END 3193 3194 3195 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3196 JNIWrapper("ReleasePrimitiveArrayCritical"); 3197 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3198 // The array, carray and mode arguments are ignored 3199 GCLocker::unlock_critical(thread); 3200 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3201 JNI_END 3202 3203 3204 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3205 JNIWrapper("GetStringCritical"); 3206 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3207 GCLocker::lock_critical(thread); 3208 oop s = JNIHandles::resolve_non_null(string); 3209 typeArrayOop s_value = java_lang_String::value(s); 3210 bool is_latin1 = java_lang_String::is_latin1(s); 3211 if (isCopy != NULL) { 3212 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3213 } 3214 jchar* ret; 3215 if (!is_latin1) { 3216 ret = (jchar*) s_value->base(T_CHAR); 3217 } else { 3218 // Inflate latin1 encoded string to UTF16 3219 int s_len = java_lang_String::length(s); 3220 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3221 /* JNI Specification states return NULL on OOM */ 3222 if (ret != NULL) { 3223 for (int i = 0; i < s_len; i++) { 3224 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3225 } 3226 ret[s_len] = 0; 3227 } 3228 } 3229 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3230 return ret; 3231 JNI_END 3232 3233 3234 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3235 JNIWrapper("ReleaseStringCritical"); 3236 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3237 // The str and chars arguments are ignored for UTF16 strings 3238 oop s = JNIHandles::resolve_non_null(str); 3239 bool is_latin1 = java_lang_String::is_latin1(s); 3240 if (is_latin1) { 3241 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3242 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3243 FREE_C_HEAP_ARRAY(jchar, chars); 3244 } 3245 GCLocker::unlock_critical(thread); 3246 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3247 JNI_END 3248 3249 3250 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3251 JNIWrapper("jni_NewWeakGlobalRef"); 3252 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3253 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3254 jweak ret = JNIHandles::make_weak_global(ref_handle); 3255 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3256 return ret; 3257 JNI_END 3258 3259 // Must be JNI_ENTRY (with HandleMark) 3260 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3261 JNIWrapper("jni_DeleteWeakGlobalRef"); 3262 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3263 JNIHandles::destroy_weak_global(ref); 3264 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3265 JNI_END 3266 3267 3268 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3269 JNIWrapper("jni_ExceptionCheck"); 3270 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3271 jni_check_async_exceptions(thread); 3272 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3273 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3274 return ret; 3275 JNI_END 3276 3277 3278 // Initialization state for three routines below relating to 3279 // java.nio.DirectBuffers 3280 static int directBufferSupportInitializeStarted = 0; 3281 static volatile int directBufferSupportInitializeEnded = 0; 3282 static volatile int directBufferSupportInitializeFailed = 0; 3283 static jclass bufferClass = NULL; 3284 static jclass directBufferClass = NULL; 3285 static jclass directByteBufferClass = NULL; 3286 static jmethodID directByteBufferConstructor = NULL; 3287 static jfieldID directBufferAddressField = NULL; 3288 static jfieldID bufferCapacityField = NULL; 3289 3290 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3291 Handle loader; // null (bootstrap) loader 3292 Handle protection_domain; // null protection domain 3293 3294 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3295 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3296 3297 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3298 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3299 } 3300 return result; 3301 } 3302 3303 // These lookups are done with the NULL (bootstrap) ClassLoader to 3304 // circumvent any security checks that would be done by jni_FindClass. 3305 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3306 { 3307 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3308 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3309 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3310 return true; 3311 } 3312 JNI_END 3313 3314 3315 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3316 if (directBufferSupportInitializeFailed) { 3317 return false; 3318 } 3319 3320 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3321 if (!lookupDirectBufferClasses(env)) { 3322 directBufferSupportInitializeFailed = 1; 3323 return false; 3324 } 3325 3326 // Make global references for these 3327 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3328 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3329 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3330 3331 // Get needed field and method IDs 3332 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3333 if (env->ExceptionCheck()) { 3334 env->ExceptionClear(); 3335 directBufferSupportInitializeFailed = 1; 3336 return false; 3337 } 3338 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3339 if (env->ExceptionCheck()) { 3340 env->ExceptionClear(); 3341 directBufferSupportInitializeFailed = 1; 3342 return false; 3343 } 3344 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3345 if (env->ExceptionCheck()) { 3346 env->ExceptionClear(); 3347 directBufferSupportInitializeFailed = 1; 3348 return false; 3349 } 3350 3351 if ((directByteBufferConstructor == NULL) || 3352 (directBufferAddressField == NULL) || 3353 (bufferCapacityField == NULL)) { 3354 directBufferSupportInitializeFailed = 1; 3355 return false; 3356 } 3357 3358 directBufferSupportInitializeEnded = 1; 3359 } else { 3360 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3361 os::naked_yield(); 3362 } 3363 } 3364 3365 return !directBufferSupportInitializeFailed; 3366 } 3367 3368 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3369 { 3370 // thread_from_jni_environment() will block if VM is gone. 3371 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3372 3373 JNIWrapper("jni_NewDirectByteBuffer"); 3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3375 3376 if (!directBufferSupportInitializeEnded) { 3377 if (!initializeDirectBufferSupport(env, thread)) { 3378 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3379 return NULL; 3380 } 3381 } 3382 3383 // Being paranoid about accidental sign extension on address 3384 jlong addr = (jlong) ((uintptr_t) address); 3385 // NOTE that package-private DirectByteBuffer constructor currently 3386 // takes int capacity 3387 jint cap = (jint) capacity; 3388 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3389 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3390 return ret; 3391 } 3392 3393 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3394 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3395 3396 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3397 { 3398 // thread_from_jni_environment() will block if VM is gone. 3399 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3400 3401 JNIWrapper("jni_GetDirectBufferAddress"); 3402 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3403 void* ret = NULL; 3404 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3405 3406 if (!directBufferSupportInitializeEnded) { 3407 if (!initializeDirectBufferSupport(env, thread)) { 3408 return 0; 3409 } 3410 } 3411 3412 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3413 return 0; 3414 } 3415 3416 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3417 return ret; 3418 } 3419 3420 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3421 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3422 3423 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3424 { 3425 // thread_from_jni_environment() will block if VM is gone. 3426 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3427 3428 JNIWrapper("jni_GetDirectBufferCapacity"); 3429 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3430 jlong ret = -1; 3431 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3432 3433 if (!directBufferSupportInitializeEnded) { 3434 if (!initializeDirectBufferSupport(env, thread)) { 3435 ret = 0; 3436 return ret; 3437 } 3438 } 3439 3440 if (buf == NULL) { 3441 return -1; 3442 } 3443 3444 if (!env->IsInstanceOf(buf, directBufferClass)) { 3445 return -1; 3446 } 3447 3448 // NOTE that capacity is currently an int in the implementation 3449 ret = env->GetIntField(buf, bufferCapacityField); 3450 return ret; 3451 } 3452 3453 3454 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3455 JNIWrapper("GetVersion"); 3456 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3457 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3458 return CurrentVersion; 3459 JNI_END 3460 3461 extern struct JavaVM_ main_vm; 3462 3463 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3464 JNIWrapper("jni_GetJavaVM"); 3465 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3466 *vm = (JavaVM *)(&main_vm); 3467 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3468 return JNI_OK; 3469 JNI_END 3470 3471 3472 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3473 JNIWrapper("GetModule"); 3474 return Modules::get_module(clazz, THREAD); 3475 JNI_END 3476 3477 3478 // Structure containing all jni functions 3479 struct JNINativeInterface_ jni_NativeInterface = { 3480 NULL, 3481 NULL, 3482 NULL, 3483 3484 NULL, 3485 3486 jni_GetVersion, 3487 3488 jni_DefineClass, 3489 jni_FindClass, 3490 3491 jni_FromReflectedMethod, 3492 jni_FromReflectedField, 3493 3494 jni_ToReflectedMethod, 3495 3496 jni_GetSuperclass, 3497 jni_IsAssignableFrom, 3498 3499 jni_ToReflectedField, 3500 3501 jni_Throw, 3502 jni_ThrowNew, 3503 jni_ExceptionOccurred, 3504 jni_ExceptionDescribe, 3505 jni_ExceptionClear, 3506 jni_FatalError, 3507 3508 jni_PushLocalFrame, 3509 jni_PopLocalFrame, 3510 3511 jni_NewGlobalRef, 3512 jni_DeleteGlobalRef, 3513 jni_DeleteLocalRef, 3514 jni_IsSameObject, 3515 3516 jni_NewLocalRef, 3517 jni_EnsureLocalCapacity, 3518 3519 jni_AllocObject, 3520 jni_NewObject, 3521 jni_NewObjectV, 3522 jni_NewObjectA, 3523 3524 jni_GetObjectClass, 3525 jni_IsInstanceOf, 3526 3527 jni_GetMethodID, 3528 3529 jni_CallObjectMethod, 3530 jni_CallObjectMethodV, 3531 jni_CallObjectMethodA, 3532 jni_CallBooleanMethod, 3533 jni_CallBooleanMethodV, 3534 jni_CallBooleanMethodA, 3535 jni_CallByteMethod, 3536 jni_CallByteMethodV, 3537 jni_CallByteMethodA, 3538 jni_CallCharMethod, 3539 jni_CallCharMethodV, 3540 jni_CallCharMethodA, 3541 jni_CallShortMethod, 3542 jni_CallShortMethodV, 3543 jni_CallShortMethodA, 3544 jni_CallIntMethod, 3545 jni_CallIntMethodV, 3546 jni_CallIntMethodA, 3547 jni_CallLongMethod, 3548 jni_CallLongMethodV, 3549 jni_CallLongMethodA, 3550 jni_CallFloatMethod, 3551 jni_CallFloatMethodV, 3552 jni_CallFloatMethodA, 3553 jni_CallDoubleMethod, 3554 jni_CallDoubleMethodV, 3555 jni_CallDoubleMethodA, 3556 jni_CallVoidMethod, 3557 jni_CallVoidMethodV, 3558 jni_CallVoidMethodA, 3559 3560 jni_CallNonvirtualObjectMethod, 3561 jni_CallNonvirtualObjectMethodV, 3562 jni_CallNonvirtualObjectMethodA, 3563 jni_CallNonvirtualBooleanMethod, 3564 jni_CallNonvirtualBooleanMethodV, 3565 jni_CallNonvirtualBooleanMethodA, 3566 jni_CallNonvirtualByteMethod, 3567 jni_CallNonvirtualByteMethodV, 3568 jni_CallNonvirtualByteMethodA, 3569 jni_CallNonvirtualCharMethod, 3570 jni_CallNonvirtualCharMethodV, 3571 jni_CallNonvirtualCharMethodA, 3572 jni_CallNonvirtualShortMethod, 3573 jni_CallNonvirtualShortMethodV, 3574 jni_CallNonvirtualShortMethodA, 3575 jni_CallNonvirtualIntMethod, 3576 jni_CallNonvirtualIntMethodV, 3577 jni_CallNonvirtualIntMethodA, 3578 jni_CallNonvirtualLongMethod, 3579 jni_CallNonvirtualLongMethodV, 3580 jni_CallNonvirtualLongMethodA, 3581 jni_CallNonvirtualFloatMethod, 3582 jni_CallNonvirtualFloatMethodV, 3583 jni_CallNonvirtualFloatMethodA, 3584 jni_CallNonvirtualDoubleMethod, 3585 jni_CallNonvirtualDoubleMethodV, 3586 jni_CallNonvirtualDoubleMethodA, 3587 jni_CallNonvirtualVoidMethod, 3588 jni_CallNonvirtualVoidMethodV, 3589 jni_CallNonvirtualVoidMethodA, 3590 3591 jni_GetFieldID, 3592 3593 jni_GetObjectField, 3594 jni_GetBooleanField, 3595 jni_GetByteField, 3596 jni_GetCharField, 3597 jni_GetShortField, 3598 jni_GetIntField, 3599 jni_GetLongField, 3600 jni_GetFloatField, 3601 jni_GetDoubleField, 3602 3603 jni_SetObjectField, 3604 jni_SetBooleanField, 3605 jni_SetByteField, 3606 jni_SetCharField, 3607 jni_SetShortField, 3608 jni_SetIntField, 3609 jni_SetLongField, 3610 jni_SetFloatField, 3611 jni_SetDoubleField, 3612 3613 jni_GetStaticMethodID, 3614 3615 jni_CallStaticObjectMethod, 3616 jni_CallStaticObjectMethodV, 3617 jni_CallStaticObjectMethodA, 3618 jni_CallStaticBooleanMethod, 3619 jni_CallStaticBooleanMethodV, 3620 jni_CallStaticBooleanMethodA, 3621 jni_CallStaticByteMethod, 3622 jni_CallStaticByteMethodV, 3623 jni_CallStaticByteMethodA, 3624 jni_CallStaticCharMethod, 3625 jni_CallStaticCharMethodV, 3626 jni_CallStaticCharMethodA, 3627 jni_CallStaticShortMethod, 3628 jni_CallStaticShortMethodV, 3629 jni_CallStaticShortMethodA, 3630 jni_CallStaticIntMethod, 3631 jni_CallStaticIntMethodV, 3632 jni_CallStaticIntMethodA, 3633 jni_CallStaticLongMethod, 3634 jni_CallStaticLongMethodV, 3635 jni_CallStaticLongMethodA, 3636 jni_CallStaticFloatMethod, 3637 jni_CallStaticFloatMethodV, 3638 jni_CallStaticFloatMethodA, 3639 jni_CallStaticDoubleMethod, 3640 jni_CallStaticDoubleMethodV, 3641 jni_CallStaticDoubleMethodA, 3642 jni_CallStaticVoidMethod, 3643 jni_CallStaticVoidMethodV, 3644 jni_CallStaticVoidMethodA, 3645 3646 jni_GetStaticFieldID, 3647 3648 jni_GetStaticObjectField, 3649 jni_GetStaticBooleanField, 3650 jni_GetStaticByteField, 3651 jni_GetStaticCharField, 3652 jni_GetStaticShortField, 3653 jni_GetStaticIntField, 3654 jni_GetStaticLongField, 3655 jni_GetStaticFloatField, 3656 jni_GetStaticDoubleField, 3657 3658 jni_SetStaticObjectField, 3659 jni_SetStaticBooleanField, 3660 jni_SetStaticByteField, 3661 jni_SetStaticCharField, 3662 jni_SetStaticShortField, 3663 jni_SetStaticIntField, 3664 jni_SetStaticLongField, 3665 jni_SetStaticFloatField, 3666 jni_SetStaticDoubleField, 3667 3668 jni_NewString, 3669 jni_GetStringLength, 3670 jni_GetStringChars, 3671 jni_ReleaseStringChars, 3672 3673 jni_NewStringUTF, 3674 jni_GetStringUTFLength, 3675 jni_GetStringUTFChars, 3676 jni_ReleaseStringUTFChars, 3677 3678 jni_GetArrayLength, 3679 3680 jni_NewObjectArray, 3681 jni_GetObjectArrayElement, 3682 jni_SetObjectArrayElement, 3683 3684 jni_NewBooleanArray, 3685 jni_NewByteArray, 3686 jni_NewCharArray, 3687 jni_NewShortArray, 3688 jni_NewIntArray, 3689 jni_NewLongArray, 3690 jni_NewFloatArray, 3691 jni_NewDoubleArray, 3692 3693 jni_GetBooleanArrayElements, 3694 jni_GetByteArrayElements, 3695 jni_GetCharArrayElements, 3696 jni_GetShortArrayElements, 3697 jni_GetIntArrayElements, 3698 jni_GetLongArrayElements, 3699 jni_GetFloatArrayElements, 3700 jni_GetDoubleArrayElements, 3701 3702 jni_ReleaseBooleanArrayElements, 3703 jni_ReleaseByteArrayElements, 3704 jni_ReleaseCharArrayElements, 3705 jni_ReleaseShortArrayElements, 3706 jni_ReleaseIntArrayElements, 3707 jni_ReleaseLongArrayElements, 3708 jni_ReleaseFloatArrayElements, 3709 jni_ReleaseDoubleArrayElements, 3710 3711 jni_GetBooleanArrayRegion, 3712 jni_GetByteArrayRegion, 3713 jni_GetCharArrayRegion, 3714 jni_GetShortArrayRegion, 3715 jni_GetIntArrayRegion, 3716 jni_GetLongArrayRegion, 3717 jni_GetFloatArrayRegion, 3718 jni_GetDoubleArrayRegion, 3719 3720 jni_SetBooleanArrayRegion, 3721 jni_SetByteArrayRegion, 3722 jni_SetCharArrayRegion, 3723 jni_SetShortArrayRegion, 3724 jni_SetIntArrayRegion, 3725 jni_SetLongArrayRegion, 3726 jni_SetFloatArrayRegion, 3727 jni_SetDoubleArrayRegion, 3728 3729 jni_RegisterNatives, 3730 jni_UnregisterNatives, 3731 3732 jni_MonitorEnter, 3733 jni_MonitorExit, 3734 3735 jni_GetJavaVM, 3736 3737 jni_GetStringRegion, 3738 jni_GetStringUTFRegion, 3739 3740 jni_GetPrimitiveArrayCritical, 3741 jni_ReleasePrimitiveArrayCritical, 3742 3743 jni_GetStringCritical, 3744 jni_ReleaseStringCritical, 3745 3746 jni_NewWeakGlobalRef, 3747 jni_DeleteWeakGlobalRef, 3748 3749 jni_ExceptionCheck, 3750 3751 jni_NewDirectByteBuffer, 3752 jni_GetDirectBufferAddress, 3753 jni_GetDirectBufferCapacity, 3754 3755 // New 1_6 features 3756 3757 jni_GetObjectRefType, 3758 3759 // Module features 3760 3761 jni_GetModule 3762 }; 3763 3764 3765 // For jvmti use to modify jni function table. 3766 // Java threads in native contiues to run until it is transitioned 3767 // to VM at safepoint. Before the transition or before it is blocked 3768 // for safepoint it may access jni function table. VM could crash if 3769 // any java thread access the jni function table in the middle of memcpy. 3770 // To avoid this each function pointers are copied automically. 3771 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3772 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3773 intptr_t *a = (intptr_t *) jni_functions(); 3774 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3775 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3776 Atomic::store(*b++, a++); 3777 } 3778 } 3779 3780 void quicken_jni_functions() { 3781 // Replace Get<Primitive>Field with fast versions 3782 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3783 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3784 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3785 // windows x86 currently needs SEH wrapper and the gain of the fast 3786 // versions currently isn't certain for server vm on uniprocessor. 3787 && os::is_MP() 3788 #endif 3789 ) { 3790 address func; 3791 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3792 if (func != (address)-1) { 3793 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3794 } 3795 func = JNI_FastGetField::generate_fast_get_byte_field(); 3796 if (func != (address)-1) { 3797 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3798 } 3799 func = JNI_FastGetField::generate_fast_get_char_field(); 3800 if (func != (address)-1) { 3801 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3802 } 3803 func = JNI_FastGetField::generate_fast_get_short_field(); 3804 if (func != (address)-1) { 3805 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3806 } 3807 func = JNI_FastGetField::generate_fast_get_int_field(); 3808 if (func != (address)-1) { 3809 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3810 } 3811 func = JNI_FastGetField::generate_fast_get_long_field(); 3812 if (func != (address)-1) { 3813 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3814 } 3815 func = JNI_FastGetField::generate_fast_get_float_field(); 3816 if (func != (address)-1) { 3817 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3818 } 3819 func = JNI_FastGetField::generate_fast_get_double_field(); 3820 if (func != (address)-1) { 3821 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3822 } 3823 } 3824 } 3825 3826 // Returns the function structure 3827 struct JNINativeInterface_* jni_functions() { 3828 #if INCLUDE_JNI_CHECK 3829 if (CheckJNICalls) return jni_functions_check(); 3830 #endif // INCLUDE_JNI_CHECK 3831 return &jni_NativeInterface; 3832 } 3833 3834 // Returns the function structure 3835 struct JNINativeInterface_* jni_functions_nocheck() { 3836 return &jni_NativeInterface; 3837 } 3838 3839 3840 // Invocation API 3841 3842 3843 // Forward declaration 3844 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3845 3846 // Global invocation API vars 3847 volatile int vm_created = 0; 3848 // Indicate whether it is safe to recreate VM 3849 volatile int safe_to_recreate_vm = 1; 3850 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3851 3852 3853 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3854 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3855 3856 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3857 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3858 3859 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3860 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3861 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3862 jint ret = JNI_ERR; 3863 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3864 3865 if (Threads::is_supported_jni_version(args->version)) { 3866 ret = JNI_OK; 3867 } 3868 // 1.1 style no longer supported in hotspot. 3869 // According the JNI spec, we should update args->version on return. 3870 // We also use the structure to communicate with launcher about default 3871 // stack size. 3872 if (args->version == JNI_VERSION_1_1) { 3873 args->version = JNI_VERSION_1_2; 3874 // javaStackSize is int in arguments structure 3875 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3876 args->javaStackSize = (jint)(ThreadStackSize * K); 3877 } 3878 return ret; 3879 } 3880 3881 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3882 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3883 3884 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3885 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3886 3887 jint result = JNI_ERR; 3888 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3889 3890 // We're about to use Atomic::xchg for synchronization. Some Zero 3891 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3892 // but __sync_lock_test_and_set is not guaranteed to do what we want 3893 // on all architectures. So we check it works before relying on it. 3894 #if defined(ZERO) && defined(ASSERT) 3895 { 3896 jint a = 0xcafebabe; 3897 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3898 void *c = &a; 3899 void *d = Atomic::xchg(&b, &c); 3900 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3901 assert(c == &b && d == &a, "Atomic::xchg() works"); 3902 } 3903 #endif // ZERO && ASSERT 3904 3905 // At the moment it's only possible to have one Java VM, 3906 // since some of the runtime state is in global variables. 3907 3908 // We cannot use our mutex locks here, since they only work on 3909 // Threads. We do an atomic compare and exchange to ensure only 3910 // one thread can call this method at a time 3911 3912 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3913 // the add/dec implementations are dependent on whether we are running 3914 // on a multiprocessor, and at this stage of initialization the os::is_MP 3915 // function used to determine this will always return false. Atomic::xchg 3916 // does not have this problem. 3917 if (Atomic::xchg(1, &vm_created) == 1) { 3918 return JNI_EEXIST; // already created, or create attempt in progress 3919 } 3920 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3921 return JNI_ERR; // someone tried and failed and retry not allowed. 3922 } 3923 3924 assert(vm_created == 1, "vm_created is true during the creation"); 3925 3926 /** 3927 * Certain errors during initialization are recoverable and do not 3928 * prevent this method from being called again at a later time 3929 * (perhaps with different arguments). However, at a certain 3930 * point during initialization if an error occurs we cannot allow 3931 * this function to be called again (or it will crash). In those 3932 * situations, the 'canTryAgain' flag is set to false, which atomically 3933 * sets safe_to_recreate_vm to 1, such that any new call to 3934 * JNI_CreateJavaVM will immediately fail using the above logic. 3935 */ 3936 bool can_try_again = true; 3937 3938 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3939 if (result == JNI_OK) { 3940 JavaThread *thread = JavaThread::current(); 3941 assert(!thread->has_pending_exception(), "should have returned not OK"); 3942 /* thread is thread_in_vm here */ 3943 *vm = (JavaVM *)(&main_vm); 3944 *(JNIEnv**)penv = thread->jni_environment(); 3945 3946 #if INCLUDE_JVMCI 3947 if (EnableJVMCI) { 3948 if (UseJVMCICompiler) { 3949 // JVMCI is initialized on a CompilerThread 3950 if (BootstrapJVMCI) { 3951 JavaThread* THREAD = thread; 3952 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3953 compiler->bootstrap(THREAD); 3954 if (HAS_PENDING_EXCEPTION) { 3955 HandleMark hm; 3956 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3957 } 3958 } 3959 } 3960 } 3961 #endif 3962 3963 // Tracks the time application was running before GC 3964 RuntimeService::record_application_start(); 3965 3966 // Notify JVMTI 3967 if (JvmtiExport::should_post_thread_life()) { 3968 JvmtiExport::post_thread_start(thread); 3969 } 3970 3971 EventThreadStart event; 3972 if (event.should_commit()) { 3973 event.set_thread(THREAD_TRACE_ID(thread)); 3974 event.commit(); 3975 } 3976 3977 #ifndef PRODUCT 3978 // Check if we should compile all classes on bootclasspath 3979 if (CompileTheWorld) ClassLoader::compile_the_world(); 3980 if (ReplayCompiles) ciReplay::replay(thread); 3981 3982 // Some platforms (like Win*) need a wrapper around these test 3983 // functions in order to properly handle error conditions. 3984 VMError::test_error_handler(); 3985 if (ExecuteInternalVMTests) { 3986 InternalVMTests::run(); 3987 } 3988 #endif 3989 3990 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3991 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3992 } else { 3993 // If create_vm exits because of a pending exception, exit with that 3994 // exception. In the future when we figure out how to reclaim memory, 3995 // we may be able to exit with JNI_ERR and allow the calling application 3996 // to continue. 3997 if (Universe::is_fully_initialized()) { 3998 // otherwise no pending exception possible - VM will already have aborted 3999 JavaThread* THREAD = JavaThread::current(); 4000 if (HAS_PENDING_EXCEPTION) { 4001 HandleMark hm; 4002 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4003 } 4004 } 4005 4006 if (can_try_again) { 4007 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4008 safe_to_recreate_vm = 1; 4009 } 4010 4011 // Creation failed. We must reset vm_created 4012 *vm = 0; 4013 *(JNIEnv**)penv = 0; 4014 // reset vm_created last to avoid race condition. Use OrderAccess to 4015 // control both compiler and architectural-based reordering. 4016 OrderAccess::release_store(&vm_created, 0); 4017 } 4018 4019 // Flush stdout and stderr before exit. 4020 fflush(stdout); 4021 fflush(stderr); 4022 4023 return result; 4024 4025 } 4026 4027 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4028 jint result = JNI_ERR; 4029 // On Windows, let CreateJavaVM run with SEH protection 4030 #ifdef _WIN32 4031 __try { 4032 #endif 4033 result = JNI_CreateJavaVM_inner(vm, penv, args); 4034 #ifdef _WIN32 4035 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4036 // Nothing to do. 4037 } 4038 #endif 4039 return result; 4040 } 4041 4042 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4043 // See bug 4367188, the wrapper can sometimes cause VM crashes 4044 // JNIWrapper("GetCreatedJavaVMs"); 4045 4046 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4047 4048 if (vm_created == 1) { 4049 if (numVMs != NULL) *numVMs = 1; 4050 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4051 } else { 4052 if (numVMs != NULL) *numVMs = 0; 4053 } 4054 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4055 return JNI_OK; 4056 } 4057 4058 extern "C" { 4059 4060 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4061 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4062 4063 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4064 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4065 jint res = JNI_ERR; 4066 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4067 4068 if (vm_created == 0) { 4069 res = JNI_ERR; 4070 return res; 4071 } 4072 4073 JNIWrapper("DestroyJavaVM"); 4074 JNIEnv *env; 4075 JavaVMAttachArgs destroyargs; 4076 destroyargs.version = CurrentVersion; 4077 destroyargs.name = (char *)"DestroyJavaVM"; 4078 destroyargs.group = NULL; 4079 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4080 if (res != JNI_OK) { 4081 return res; 4082 } 4083 4084 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4085 JavaThread* thread = JavaThread::current(); 4086 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4087 if (Threads::destroy_vm()) { 4088 // Should not change thread state, VM is gone 4089 vm_created = 0; 4090 res = JNI_OK; 4091 return res; 4092 } else { 4093 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4094 res = JNI_ERR; 4095 return res; 4096 } 4097 } 4098 4099 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4100 jint result = JNI_ERR; 4101 // On Windows, we need SEH protection 4102 #ifdef _WIN32 4103 __try { 4104 #endif 4105 result = jni_DestroyJavaVM_inner(vm); 4106 #ifdef _WIN32 4107 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4108 // Nothing to do. 4109 } 4110 #endif 4111 return result; 4112 } 4113 4114 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4115 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4116 4117 // Check below commented out from JDK1.2fcs as well 4118 /* 4119 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4120 return JNI_EVERSION; 4121 } 4122 */ 4123 4124 Thread* t = Thread::current_or_null(); 4125 if (t != NULL) { 4126 // If the thread has been attached this operation is a no-op 4127 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4128 return JNI_OK; 4129 } 4130 4131 // Create a thread and mark it as attaching so it will be skipped by the 4132 // ThreadsListEnumerator - see CR 6404306 4133 JavaThread* thread = new JavaThread(true); 4134 4135 // Set correct safepoint info. The thread is going to call into Java when 4136 // initializing the Java level thread object. Hence, the correct state must 4137 // be set in order for the Safepoint code to deal with it correctly. 4138 thread->set_thread_state(_thread_in_vm); 4139 thread->record_stack_base_and_size(); 4140 thread->initialize_thread_current(); 4141 4142 if (!os::create_attached_thread(thread)) { 4143 delete thread; 4144 return JNI_ERR; 4145 } 4146 // Enable stack overflow checks 4147 thread->create_stack_guard_pages(); 4148 4149 thread->initialize_tlab(); 4150 4151 thread->cache_global_variables(); 4152 4153 // Crucial that we do not have a safepoint check for this thread, since it has 4154 // not been added to the Thread list yet. 4155 { Threads_lock->lock_without_safepoint_check(); 4156 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4157 // avoid this thread trying to do a GC before it is added to the thread-list 4158 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4159 Threads::add(thread, daemon); 4160 Threads_lock->unlock(); 4161 } 4162 // Create thread group and name info from attach arguments 4163 oop group = NULL; 4164 char* thread_name = NULL; 4165 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4166 group = JNIHandles::resolve(args->group); 4167 thread_name = args->name; // may be NULL 4168 } 4169 if (group == NULL) group = Universe::main_thread_group(); 4170 4171 // Create Java level thread object and attach it to this thread 4172 bool attach_failed = false; 4173 { 4174 EXCEPTION_MARK; 4175 HandleMark hm(THREAD); 4176 Handle thread_group(THREAD, group); 4177 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4178 if (HAS_PENDING_EXCEPTION) { 4179 CLEAR_PENDING_EXCEPTION; 4180 // cleanup outside the handle mark. 4181 attach_failed = true; 4182 } 4183 } 4184 4185 if (attach_failed) { 4186 // Added missing cleanup 4187 thread->cleanup_failed_attach_current_thread(); 4188 return JNI_ERR; 4189 } 4190 4191 // mark the thread as no longer attaching 4192 // this uses a fence to push the change through so we don't have 4193 // to regrab the threads_lock 4194 thread->set_done_attaching_via_jni(); 4195 4196 // Set java thread status. 4197 java_lang_Thread::set_thread_status(thread->threadObj(), 4198 java_lang_Thread::RUNNABLE); 4199 4200 // Notify the debugger 4201 if (JvmtiExport::should_post_thread_life()) { 4202 JvmtiExport::post_thread_start(thread); 4203 } 4204 4205 EventThreadStart event; 4206 if (event.should_commit()) { 4207 event.set_thread(THREAD_TRACE_ID(thread)); 4208 event.commit(); 4209 } 4210 4211 *(JNIEnv**)penv = thread->jni_environment(); 4212 4213 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4214 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4215 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4216 // needed. 4217 4218 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4219 4220 // Perform any platform dependent FPU setup 4221 os::setup_fpu(); 4222 4223 return JNI_OK; 4224 } 4225 4226 4227 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4228 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4229 if (vm_created == 0) { 4230 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4231 return JNI_ERR; 4232 } 4233 4234 JNIWrapper("AttachCurrentThread"); 4235 jint ret = attach_current_thread(vm, penv, _args, false); 4236 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4237 return ret; 4238 } 4239 4240 4241 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4242 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4243 VM_Exit::block_if_vm_exited(); 4244 4245 JNIWrapper("DetachCurrentThread"); 4246 4247 // If the thread has already been detached the operation is a no-op 4248 if (Thread::current_or_null() == NULL) { 4249 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4250 return JNI_OK; 4251 } 4252 4253 JavaThread* thread = JavaThread::current(); 4254 if (thread->has_last_Java_frame()) { 4255 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4256 // Can't detach a thread that's running java, that can't work. 4257 return JNI_ERR; 4258 } 4259 4260 // Safepoint support. Have to do call-back to safepoint code, if in the 4261 // middel of a safepoint operation 4262 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4263 4264 // XXX: Note that JavaThread::exit() call below removes the guards on the 4265 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4266 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4267 // of the guards is visible in jni_AttachCurrentThread above, 4268 // the removal of the guards is buried below in JavaThread::exit() 4269 // here. The abstraction should be more symmetrically either exposed 4270 // or hidden (e.g. it could probably be hidden in the same 4271 // (platform-dependent) methods where we do alternate stack 4272 // maintenance work?) 4273 thread->exit(false, JavaThread::jni_detach); 4274 delete thread; 4275 4276 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4277 return JNI_OK; 4278 } 4279 4280 DT_RETURN_MARK_DECL(GetEnv, jint 4281 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4282 4283 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4284 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4285 jint ret = JNI_ERR; 4286 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4287 4288 if (vm_created == 0) { 4289 *penv = NULL; 4290 ret = JNI_EDETACHED; 4291 return ret; 4292 } 4293 4294 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4295 return ret; 4296 } 4297 4298 #ifndef JVMPI_VERSION_1 4299 // need these in order to be polite about older agents 4300 #define JVMPI_VERSION_1 ((jint)0x10000001) 4301 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4302 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4303 #endif // !JVMPI_VERSION_1 4304 4305 Thread* thread = Thread::current_or_null(); 4306 if (thread != NULL && thread->is_Java_thread()) { 4307 if (Threads::is_supported_jni_version_including_1_1(version)) { 4308 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4309 ret = JNI_OK; 4310 return ret; 4311 4312 } else if (version == JVMPI_VERSION_1 || 4313 version == JVMPI_VERSION_1_1 || 4314 version == JVMPI_VERSION_1_2) { 4315 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4316 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4317 ret = JNI_EVERSION; 4318 return ret; 4319 } else if (JvmtiExport::is_jvmdi_version(version)) { 4320 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4321 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4322 ret = JNI_EVERSION; 4323 return ret; 4324 } else { 4325 *penv = NULL; 4326 ret = JNI_EVERSION; 4327 return ret; 4328 } 4329 } else { 4330 *penv = NULL; 4331 ret = JNI_EDETACHED; 4332 return ret; 4333 } 4334 } 4335 4336 4337 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4338 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4339 if (vm_created == 0) { 4340 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4341 return JNI_ERR; 4342 } 4343 4344 JNIWrapper("AttachCurrentThreadAsDaemon"); 4345 jint ret = attach_current_thread(vm, penv, _args, true); 4346 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4347 return ret; 4348 } 4349 4350 4351 } // End extern "C" 4352 4353 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4354 NULL, 4355 NULL, 4356 NULL, 4357 4358 jni_DestroyJavaVM, 4359 jni_AttachCurrentThread, 4360 jni_DetachCurrentThread, 4361 jni_GetEnv, 4362 jni_AttachCurrentThreadAsDaemon 4363 };