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 "ci/ciReplay.hpp" 28 #include "classfile/altHashing.hpp" 29 #include "classfile/classFileStream.hpp" 30 #include "classfile/classLoader.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/modules.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionary.hpp" 36 #include "classfile/vmSymbols.hpp" 37 #include "gc/shared/gcLocker.inline.hpp" 38 #include "interpreter/linkResolver.hpp" 39 #include "memory/allocation.hpp" 40 #include "memory/allocation.inline.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.inline.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceOop.hpp" 46 #include "oops/markOop.hpp" 47 #include "oops/method.hpp" 48 #include "oops/objArrayKlass.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayKlass.hpp" 53 #include "oops/typeArrayOop.hpp" 54 #include "prims/jni.h" 55 #include "prims/jniCheck.hpp" 56 #include "prims/jniExport.hpp" 57 #include "prims/jniFastGetField.hpp" 58 #include "prims/jvm.h" 59 #include "prims/jvm_misc.hpp" 60 #include "prims/jvmtiExport.hpp" 61 #include "prims/jvmtiThreadState.hpp" 62 #include "runtime/atomic.hpp" 63 #include "runtime/compilationPolicy.hpp" 64 #include "runtime/fieldDescriptor.hpp" 65 #include "runtime/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 jint JNIHistogram_lock = 0; 267 268 class JNIHistogramElement : public HistogramElement { 269 public: 270 JNIHistogramElement(const char* name); 271 }; 272 273 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 274 _name = elementName; 275 uintx count = 0; 276 277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 279 count +=1; 280 if ( (WarnOnStalledSpinLock > 0) 281 && (count % WarnOnStalledSpinLock == 0)) { 282 warning("JNIHistogram_lock seems to be stalled"); 283 } 284 } 285 } 286 287 288 if(JNIHistogram == NULL) 289 JNIHistogram = new Histogram("JNI Call Counts",100); 290 291 JNIHistogram->add_element(this); 292 Atomic::dec(&JNIHistogram_lock); 293 } 294 295 #define JNICountWrapper(arg) \ 296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 298 if (e != NULL) e->increment_count() 299 #define JNIWrapper(arg) JNICountWrapper(arg); 300 #else 301 #define JNIWrapper(arg) 302 #endif 303 304 305 // Implementation of JNI entries 306 307 DT_RETURN_MARK_DECL(DefineClass, jclass 308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 309 310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 311 const jbyte *buf, jsize bufLen)) 312 JNIWrapper("DefineClass"); 313 314 HOTSPOT_JNI_DEFINECLASS_ENTRY( 315 env, (char*) name, loaderRef, (char*) buf, bufLen); 316 317 jclass cls = NULL; 318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 319 320 TempNewSymbol class_name = NULL; 321 // Since exceptions can be thrown, class initialization can take place 322 // if name is NULL no check for class name in .class stream has to be made. 323 if (name != NULL) { 324 const int str_len = (int)strlen(name); 325 if (str_len > Symbol::max_length()) { 326 // It's impossible to create this class; the name cannot fit 327 // into the constant pool. 328 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 loader; 400 Handle protection_domain; 401 // Find calling class 402 Klass* k = thread->security_get_caller_class(0); 403 if (k != NULL) { 404 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 405 // in the correct class context. 406 if (k->class_loader() == NULL && 407 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 408 JavaValue result(T_OBJECT); 409 JavaCalls::call_static(&result, k, 410 vmSymbols::getFromClass_name(), 411 vmSymbols::void_class_signature(), 412 CHECK_NULL); 413 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 414 // a non-NULL Class object. When invoked from JNI_OnUnload, 415 // it will return NULL to indicate no context. 416 oop mirror = (oop) result.get_jobject(); 417 if (mirror != NULL) { 418 Klass* fromClass = java_lang_Class::as_Klass(mirror); 419 loader = Handle(THREAD, fromClass->class_loader()); 420 protection_domain = Handle(THREAD, fromClass->protection_domain()); 421 } 422 } else { 423 loader = Handle(THREAD, k->class_loader()); 424 } 425 } 426 427 if (loader.is_null()) { 428 // No context and use the system class loader 429 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 430 } 431 432 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 433 result = find_class_from_class_loader(env, sym, true, loader, 434 protection_domain, true, thread); 435 436 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 437 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 438 } 439 440 // If we were the first invocation of jni_FindClass, we enable compilation again 441 // rather than just allowing invocation counter to overflow and decay. 442 // Controlled by flag DelayCompilationDuringStartup. 443 if (first_time && !CompileTheWorld) 444 CompilationPolicy::completed_vm_startup(); 445 446 return result; 447 JNI_END 448 449 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 450 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 451 452 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 453 JNIWrapper("FromReflectedMethod"); 454 455 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 456 457 jmethodID ret = NULL; 458 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 459 460 // method is a handle to a java.lang.reflect.Method object 461 oop reflected = JNIHandles::resolve_non_null(method); 462 oop mirror = NULL; 463 int slot = 0; 464 465 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 466 mirror = java_lang_reflect_Constructor::clazz(reflected); 467 slot = java_lang_reflect_Constructor::slot(reflected); 468 } else { 469 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 470 mirror = java_lang_reflect_Method::clazz(reflected); 471 slot = java_lang_reflect_Method::slot(reflected); 472 } 473 Klass* k1 = java_lang_Class::as_Klass(mirror); 474 475 // Make sure class is initialized before handing id's out to methods 476 k1->initialize(CHECK_NULL); 477 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 478 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 479 return ret; 480 JNI_END 481 482 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 483 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 484 485 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 486 JNIWrapper("FromReflectedField"); 487 488 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 489 490 jfieldID ret = NULL; 491 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 492 493 // field is a handle to a java.lang.reflect.Field object 494 oop reflected = JNIHandles::resolve_non_null(field); 495 oop mirror = java_lang_reflect_Field::clazz(reflected); 496 Klass* k1 = java_lang_Class::as_Klass(mirror); 497 int slot = java_lang_reflect_Field::slot(reflected); 498 int modifiers = java_lang_reflect_Field::modifiers(reflected); 499 500 // Make sure class is initialized before handing id's out to fields 501 k1->initialize(CHECK_NULL); 502 503 // First check if this is a static field 504 if (modifiers & JVM_ACC_STATIC) { 505 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 506 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 507 assert(id != NULL, "corrupt Field object"); 508 debug_only(id->set_is_static_field_id();) 509 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 510 ret = jfieldIDWorkaround::to_static_jfieldID(id); 511 return ret; 512 } 513 514 // The slot is the index of the field description in the field-array 515 // The jfieldID is the offset of the field within the object 516 // It may also have hash bits for k, if VerifyJNIFields is turned on. 517 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 518 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 519 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 520 return ret; 521 JNI_END 522 523 524 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 525 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 526 527 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 528 JNIWrapper("ToReflectedMethod"); 529 530 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 531 532 jobject ret = NULL; 533 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 534 535 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 536 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 537 oop reflection_method; 538 if (m->is_initializer()) { 539 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 540 } else { 541 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 542 } 543 ret = JNIHandles::make_local(env, reflection_method); 544 return ret; 545 JNI_END 546 547 DT_RETURN_MARK_DECL(GetSuperclass, jclass 548 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 549 550 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 551 JNIWrapper("GetSuperclass"); 552 553 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 554 555 jclass obj = NULL; 556 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 557 558 oop mirror = JNIHandles::resolve_non_null(sub); 559 // primitive classes return NULL 560 if (java_lang_Class::is_primitive(mirror)) return NULL; 561 562 // Rules of Class.getSuperClass as implemented by KLass::java_super: 563 // arrays return Object 564 // interfaces return NULL 565 // proper classes return Klass::super() 566 Klass* k = java_lang_Class::as_Klass(mirror); 567 if (k->is_interface()) return NULL; 568 569 // return mirror for superclass 570 Klass* super = k->java_super(); 571 // super2 is the value computed by the compiler's getSuperClass intrinsic: 572 debug_only(Klass* super2 = ( k->is_array_klass() 573 ? SystemDictionary::Object_klass() 574 : k->super() ) ); 575 assert(super == super2, 576 "java_super computation depends on interface, array, other super"); 577 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 578 return obj; 579 JNI_END 580 581 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 582 JNIWrapper("IsSubclassOf"); 583 584 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 585 586 oop sub_mirror = JNIHandles::resolve_non_null(sub); 587 oop super_mirror = JNIHandles::resolve_non_null(super); 588 if (java_lang_Class::is_primitive(sub_mirror) || 589 java_lang_Class::is_primitive(super_mirror)) { 590 jboolean ret = (sub_mirror == super_mirror); 591 592 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 593 return ret; 594 } 595 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 596 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 597 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 598 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 599 JNI_TRUE : JNI_FALSE; 600 601 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 602 return ret; 603 JNI_END 604 605 606 DT_RETURN_MARK_DECL(Throw, jint 607 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 608 609 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 610 JNIWrapper("Throw"); 611 612 HOTSPOT_JNI_THROW_ENTRY(env, obj); 613 614 jint ret = JNI_OK; 615 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 616 617 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 618 ShouldNotReachHere(); 619 return 0; // Mute compiler. 620 JNI_END 621 622 623 DT_RETURN_MARK_DECL(ThrowNew, jint 624 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 625 626 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 627 JNIWrapper("ThrowNew"); 628 629 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 630 631 jint ret = JNI_OK; 632 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 633 634 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 635 Symbol* name = k->name(); 636 Handle class_loader (THREAD, k->class_loader()); 637 Handle protection_domain (THREAD, k->protection_domain()); 638 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 639 ShouldNotReachHere(); 640 return 0; // Mute compiler. 641 JNI_END 642 643 644 // JNI functions only transform a pending async exception to a synchronous 645 // exception in ExceptionOccurred and ExceptionCheck calls, since 646 // delivering an async exception in other places won't change the native 647 // code's control flow and would be harmful when native code further calls 648 // JNI functions with a pending exception. Async exception is also checked 649 // during the call, so ExceptionOccurred/ExceptionCheck won't return 650 // false but deliver the async exception at the very end during 651 // state transition. 652 653 static void jni_check_async_exceptions(JavaThread *thread) { 654 assert(thread == Thread::current(), "must be itself"); 655 thread->check_and_handle_async_exceptions(); 656 } 657 658 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 659 JNIWrapper("ExceptionOccurred"); 660 661 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 662 663 jni_check_async_exceptions(thread); 664 oop exception = thread->pending_exception(); 665 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 666 667 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 668 return ret; 669 JNI_END 670 671 672 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 673 JNIWrapper("ExceptionDescribe"); 674 675 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 676 677 if (thread->has_pending_exception()) { 678 Handle ex(thread, thread->pending_exception()); 679 thread->clear_pending_exception(); 680 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 681 // Don't print anything if we are being killed. 682 } else { 683 jio_fprintf(defaultStream::error_stream(), "Exception "); 684 if (thread != NULL && thread->threadObj() != NULL) { 685 ResourceMark rm(THREAD); 686 jio_fprintf(defaultStream::error_stream(), 687 "in thread \"%s\" ", thread->get_thread_name()); 688 } 689 if (ex->is_a(SystemDictionary::Throwable_klass())) { 690 JavaValue result(T_VOID); 691 JavaCalls::call_virtual(&result, 692 ex, 693 SystemDictionary::Throwable_klass(), 694 vmSymbols::printStackTrace_name(), 695 vmSymbols::void_method_signature(), 696 THREAD); 697 // If an exception is thrown in the call it gets thrown away. Not much 698 // we can do with it. The native code that calls this, does not check 699 // for the exception - hence, it might still be in the thread when DestroyVM gets 700 // called, potentially causing a few asserts to trigger - since no pending exception 701 // is expected. 702 CLEAR_PENDING_EXCEPTION; 703 } else { 704 ResourceMark rm(THREAD); 705 jio_fprintf(defaultStream::error_stream(), 706 ". Uncaught exception of type %s.", 707 ex->klass()->external_name()); 708 } 709 } 710 } 711 712 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 713 JNI_END 714 715 716 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 717 JNIWrapper("ExceptionClear"); 718 719 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 720 721 // The jni code might be using this API to clear java thrown exception. 722 // So just mark jvmti thread exception state as exception caught. 723 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 724 if (state != NULL && state->is_exception_detected()) { 725 state->set_exception_caught(); 726 } 727 thread->clear_pending_exception(); 728 729 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 730 JNI_END 731 732 733 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 734 JNIWrapper("FatalError"); 735 736 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 737 738 tty->print_cr("FATAL ERROR in native method: %s", msg); 739 thread->print_stack(); 740 os::abort(); // Dump core and abort 741 JNI_END 742 743 744 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 745 JNIWrapper("PushLocalFrame"); 746 747 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 748 749 //%note jni_11 750 if (capacity < 0 || 751 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 752 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 753 return JNI_ERR; 754 } 755 JNIHandleBlock* old_handles = thread->active_handles(); 756 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 757 assert(new_handles != NULL, "should not be NULL"); 758 new_handles->set_pop_frame_link(old_handles); 759 thread->set_active_handles(new_handles); 760 jint ret = JNI_OK; 761 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 762 return ret; 763 JNI_END 764 765 766 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 767 JNIWrapper("PopLocalFrame"); 768 769 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 770 771 //%note jni_11 772 Handle result_handle(thread, JNIHandles::resolve(result)); 773 JNIHandleBlock* old_handles = thread->active_handles(); 774 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 775 if (new_handles != NULL) { 776 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 777 // This way code will still work if PopLocalFrame is called without a corresponding 778 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 779 // the release_block call will release the blocks. 780 thread->set_active_handles(new_handles); 781 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 782 JNIHandleBlock::release_block(old_handles, thread); // may block 783 result = JNIHandles::make_local(thread, result_handle()); 784 } 785 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 786 return result; 787 JNI_END 788 789 790 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 791 JNIWrapper("NewGlobalRef"); 792 793 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 794 795 Handle ref_handle(thread, JNIHandles::resolve(ref)); 796 jobject ret = JNIHandles::make_global(ref_handle); 797 798 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 799 return ret; 800 JNI_END 801 802 // Must be JNI_ENTRY (with HandleMark) 803 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 804 JNIWrapper("DeleteGlobalRef"); 805 806 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 807 808 JNIHandles::destroy_global(ref); 809 810 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 811 JNI_END 812 813 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 814 JNIWrapper("DeleteLocalRef"); 815 816 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 817 818 JNIHandles::destroy_local(obj); 819 820 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 821 JNI_END 822 823 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 824 JNIWrapper("IsSameObject"); 825 826 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 827 828 oop a = JNIHandles::resolve(r1); 829 oop b = JNIHandles::resolve(r2); 830 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 831 832 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 833 return ret; 834 JNI_END 835 836 837 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 838 JNIWrapper("NewLocalRef"); 839 840 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 841 842 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 843 844 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 845 return ret; 846 JNI_END 847 848 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 849 JNIWrapper("EnsureLocalCapacity"); 850 851 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 852 853 jint ret; 854 if (capacity >= 0 && 855 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 856 ret = JNI_OK; 857 } else { 858 ret = JNI_ERR; 859 } 860 861 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 862 return ret; 863 JNI_END 864 865 // Return the Handle Type 866 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 867 JNIWrapper("GetObjectRefType"); 868 869 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 870 871 jobjectRefType ret; 872 if (JNIHandles::is_local_handle(thread, obj) || 873 JNIHandles::is_frame_handle(thread, obj)) 874 ret = JNILocalRefType; 875 else if (JNIHandles::is_global_handle(obj)) 876 ret = JNIGlobalRefType; 877 else if (JNIHandles::is_weak_global_handle(obj)) 878 ret = JNIWeakGlobalRefType; 879 else 880 ret = JNIInvalidRefType; 881 882 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 883 return ret; 884 JNI_END 885 886 887 class JNI_ArgumentPusher : public SignatureIterator { 888 protected: 889 JavaCallArguments* _arguments; 890 891 virtual void get_bool () = 0; 892 virtual void get_char () = 0; 893 virtual void get_short () = 0; 894 virtual void get_byte () = 0; 895 virtual void get_int () = 0; 896 virtual void get_long () = 0; 897 virtual void get_float () = 0; 898 virtual void get_double () = 0; 899 virtual void get_object () = 0; 900 901 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 902 this->_return_type = T_ILLEGAL; 903 _arguments = NULL; 904 } 905 906 public: 907 virtual void iterate( uint64_t fingerprint ) = 0; 908 909 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 910 911 inline void do_bool() { if (!is_return_type()) get_bool(); } 912 inline void do_char() { if (!is_return_type()) get_char(); } 913 inline void do_short() { if (!is_return_type()) get_short(); } 914 inline void do_byte() { if (!is_return_type()) get_byte(); } 915 inline void do_int() { if (!is_return_type()) get_int(); } 916 inline void do_long() { if (!is_return_type()) get_long(); } 917 inline void do_float() { if (!is_return_type()) get_float(); } 918 inline void do_double() { if (!is_return_type()) get_double(); } 919 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 920 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 921 inline void do_void() { } 922 923 JavaCallArguments* arguments() { return _arguments; } 924 void push_receiver(Handle h) { _arguments->push_oop(h); } 925 }; 926 927 928 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 929 protected: 930 va_list _ap; 931 932 inline void get_bool() { 933 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 934 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 935 // TemplateInterpreterGenerator::generate_result_handler_for and 936 // SharedRuntime::generate_native_wrapper. 937 jboolean b = va_arg(_ap, jint); 938 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 939 } 940 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 941 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 942 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 943 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 944 945 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 946 947 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 948 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 949 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 950 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 951 952 inline void set_ap(va_list rap) { 953 va_copy(_ap, rap); 954 } 955 956 public: 957 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 958 : JNI_ArgumentPusher(signature) { 959 set_ap(rap); 960 } 961 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 962 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 963 set_ap(rap); 964 } 965 966 // Optimized path if we have the bitvector form of signature 967 void iterate( uint64_t fingerprint ) { 968 if (fingerprint == (uint64_t)CONST64(-1)) { 969 SignatureIterator::iterate(); // Must be too many arguments 970 } else { 971 _return_type = (BasicType)((fingerprint >> static_feature_size) & 972 result_feature_mask); 973 974 assert(fingerprint, "Fingerprint should not be 0"); 975 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 976 while ( 1 ) { 977 switch ( fingerprint & parameter_feature_mask ) { 978 case bool_parm: 979 get_bool(); 980 break; 981 case char_parm: 982 get_char(); 983 break; 984 case short_parm: 985 get_short(); 986 break; 987 case byte_parm: 988 get_byte(); 989 break; 990 case int_parm: 991 get_int(); 992 break; 993 case obj_parm: 994 get_object(); 995 break; 996 case long_parm: 997 get_long(); 998 break; 999 case float_parm: 1000 get_float(); 1001 break; 1002 case double_parm: 1003 get_double(); 1004 break; 1005 case done_parm: 1006 return; 1007 break; 1008 default: 1009 ShouldNotReachHere(); 1010 break; 1011 } 1012 fingerprint >>= parameter_feature_size; 1013 } 1014 } 1015 } 1016 }; 1017 1018 1019 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1020 protected: 1021 const jvalue *_ap; 1022 1023 inline void get_bool() { 1024 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1025 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1026 // TemplateInterpreterGenerator::generate_result_handler_for and 1027 // SharedRuntime::generate_native_wrapper. 1028 jboolean b = (_ap++)->z; 1029 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1030 } 1031 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1032 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1033 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1034 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1035 1036 inline void get_long() { _arguments->push_long((_ap++)->j); } 1037 inline void get_float() { _arguments->push_float((_ap++)->f); } 1038 inline void get_double() { _arguments->push_double((_ap++)->d);} 1039 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1040 1041 inline void set_ap(const jvalue *rap) { _ap = rap; } 1042 1043 public: 1044 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1045 : JNI_ArgumentPusher(signature) { 1046 set_ap(rap); 1047 } 1048 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1049 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1050 set_ap(rap); 1051 } 1052 1053 // Optimized path if we have the bitvector form of signature 1054 void iterate( uint64_t fingerprint ) { 1055 if (fingerprint == (uint64_t)CONST64(-1)) { 1056 SignatureIterator::iterate(); // Must be too many arguments 1057 } else { 1058 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1059 result_feature_mask); 1060 assert(fingerprint, "Fingerprint should not be 0"); 1061 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1062 while ( 1 ) { 1063 switch ( fingerprint & parameter_feature_mask ) { 1064 case bool_parm: 1065 get_bool(); 1066 break; 1067 case char_parm: 1068 get_char(); 1069 break; 1070 case short_parm: 1071 get_short(); 1072 break; 1073 case byte_parm: 1074 get_byte(); 1075 break; 1076 case int_parm: 1077 get_int(); 1078 break; 1079 case obj_parm: 1080 get_object(); 1081 break; 1082 case long_parm: 1083 get_long(); 1084 break; 1085 case float_parm: 1086 get_float(); 1087 break; 1088 case double_parm: 1089 get_double(); 1090 break; 1091 case done_parm: 1092 return; 1093 break; 1094 default: 1095 ShouldNotReachHere(); 1096 break; 1097 } 1098 fingerprint >>= parameter_feature_size; 1099 } 1100 } 1101 } 1102 }; 1103 1104 1105 enum JNICallType { 1106 JNI_STATIC, 1107 JNI_VIRTUAL, 1108 JNI_NONVIRTUAL 1109 }; 1110 1111 1112 1113 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1114 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1115 1116 // Create object to hold arguments for the JavaCall, and associate it with 1117 // the jni parser 1118 ResourceMark rm(THREAD); 1119 int number_of_parameters = method->size_of_parameters(); 1120 JavaCallArguments java_args(number_of_parameters); 1121 args->set_java_argument_object(&java_args); 1122 1123 assert(method->is_static(), "method should be static"); 1124 1125 // Fill out JavaCallArguments object 1126 args->iterate( Fingerprinter(method).fingerprint() ); 1127 // Initialize result type 1128 result->set_type(args->get_ret_type()); 1129 1130 // Invoke the method. Result is returned as oop. 1131 JavaCalls::call(result, method, &java_args, CHECK); 1132 1133 // Convert result 1134 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1135 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1136 } 1137 } 1138 1139 1140 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1141 oop recv = JNIHandles::resolve(receiver); 1142 if (recv == NULL) { 1143 THROW(vmSymbols::java_lang_NullPointerException()); 1144 } 1145 Handle h_recv(THREAD, recv); 1146 1147 int number_of_parameters; 1148 Method* selected_method; 1149 { 1150 Method* m = Method::resolve_jmethod_id(method_id); 1151 number_of_parameters = m->size_of_parameters(); 1152 Klass* holder = m->method_holder(); 1153 if (call_type != JNI_VIRTUAL) { 1154 selected_method = m; 1155 } else if (!m->has_itable_index()) { 1156 // non-interface call -- for that little speed boost, don't handlize 1157 debug_only(NoSafepointVerifier nosafepoint;) 1158 // jni_GetMethodID makes sure class is linked and initialized 1159 // so m should have a valid vtable index. 1160 assert(m->valid_vtable_index(), "no valid vtable index"); 1161 int vtbl_index = m->vtable_index(); 1162 if (vtbl_index != Method::nonvirtual_vtable_index) { 1163 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1164 } else { 1165 // final method 1166 selected_method = m; 1167 } 1168 } else { 1169 // interface call 1170 int itbl_index = m->itable_index(); 1171 Klass* k = h_recv->klass(); 1172 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1173 } 1174 } 1175 1176 methodHandle method(THREAD, selected_method); 1177 1178 // Create object to hold arguments for the JavaCall, and associate it with 1179 // the jni parser 1180 ResourceMark rm(THREAD); 1181 JavaCallArguments java_args(number_of_parameters); 1182 args->set_java_argument_object(&java_args); 1183 1184 // handle arguments 1185 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1186 args->push_receiver(h_recv); // Push jobject handle 1187 1188 // Fill out JavaCallArguments object 1189 args->iterate( Fingerprinter(method).fingerprint() ); 1190 // Initialize result type 1191 result->set_type(args->get_ret_type()); 1192 1193 // Invoke the method. Result is returned as oop. 1194 JavaCalls::call(result, method, &java_args, CHECK); 1195 1196 // Convert result 1197 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1198 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1199 } 1200 } 1201 1202 1203 static instanceOop alloc_object(jclass clazz, TRAPS) { 1204 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1205 if (k == NULL) { 1206 ResourceMark rm(THREAD); 1207 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1208 } 1209 k->check_valid_for_instantiation(false, CHECK_NULL); 1210 k->initialize(CHECK_NULL); 1211 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1212 return ih; 1213 } 1214 1215 DT_RETURN_MARK_DECL(AllocObject, jobject 1216 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1217 1218 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1219 JNIWrapper("AllocObject"); 1220 1221 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1222 1223 jobject ret = NULL; 1224 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1225 1226 instanceOop i = alloc_object(clazz, CHECK_NULL); 1227 ret = JNIHandles::make_local(env, i); 1228 return ret; 1229 JNI_END 1230 1231 DT_RETURN_MARK_DECL(NewObjectA, jobject 1232 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1233 1234 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1235 JNIWrapper("NewObjectA"); 1236 1237 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1238 1239 jobject obj = NULL; 1240 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1241 1242 instanceOop i = alloc_object(clazz, CHECK_NULL); 1243 obj = JNIHandles::make_local(env, i); 1244 JavaValue jvalue(T_VOID); 1245 JNI_ArgumentPusherArray ap(methodID, args); 1246 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1247 return obj; 1248 JNI_END 1249 1250 1251 DT_RETURN_MARK_DECL(NewObjectV, jobject 1252 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1253 1254 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1255 JNIWrapper("NewObjectV"); 1256 1257 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1258 1259 jobject obj = NULL; 1260 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1261 1262 instanceOop i = alloc_object(clazz, CHECK_NULL); 1263 obj = JNIHandles::make_local(env, i); 1264 JavaValue jvalue(T_VOID); 1265 JNI_ArgumentPusherVaArg ap(methodID, args); 1266 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1267 return obj; 1268 JNI_END 1269 1270 1271 DT_RETURN_MARK_DECL(NewObject, jobject 1272 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1273 1274 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1275 JNIWrapper("NewObject"); 1276 1277 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1278 1279 jobject obj = NULL; 1280 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1281 1282 instanceOop i = alloc_object(clazz, CHECK_NULL); 1283 obj = JNIHandles::make_local(env, i); 1284 va_list args; 1285 va_start(args, methodID); 1286 JavaValue jvalue(T_VOID); 1287 JNI_ArgumentPusherVaArg ap(methodID, args); 1288 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1289 va_end(args); 1290 return obj; 1291 JNI_END 1292 1293 1294 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1295 JNIWrapper("GetObjectClass"); 1296 1297 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1298 1299 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1300 jclass ret = 1301 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1302 1303 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1304 return ret; 1305 JNI_END 1306 1307 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1308 JNIWrapper("IsInstanceOf"); 1309 1310 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1311 1312 jboolean ret = JNI_TRUE; 1313 if (obj != NULL) { 1314 ret = JNI_FALSE; 1315 Klass* k = java_lang_Class::as_Klass( 1316 JNIHandles::resolve_non_null(clazz)); 1317 if (k != NULL) { 1318 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1319 } 1320 } 1321 1322 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1323 return ret; 1324 JNI_END 1325 1326 1327 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1328 const char *sig, bool is_static, TRAPS) { 1329 // %%%% This code should probably just call into a method in the LinkResolver 1330 // 1331 // The class should have been loaded (we have an instance of the class 1332 // passed in) so the method and signature should already be in the symbol 1333 // table. If they're not there, the method doesn't exist. 1334 const char *name_to_probe = (name_str == NULL) 1335 ? vmSymbols::object_initializer_name()->as_C_string() 1336 : name_str; 1337 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1338 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1339 1340 if (name == NULL || signature == NULL) { 1341 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1342 } 1343 1344 // Throw a NoSuchMethodError exception if we have an instance of a 1345 // primitive java.lang.Class 1346 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1347 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1348 } 1349 1350 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1351 1352 // Make sure class is linked and initialized before handing id's out to 1353 // Method*s. 1354 klass->initialize(CHECK_NULL); 1355 1356 Method* m; 1357 if (name == vmSymbols::object_initializer_name() || 1358 name == vmSymbols::class_initializer_name()) { 1359 // Never search superclasses for constructors 1360 if (klass->is_instance_klass()) { 1361 m = InstanceKlass::cast(klass)->find_method(name, signature); 1362 } else { 1363 m = NULL; 1364 } 1365 } else { 1366 m = klass->lookup_method(name, signature); 1367 if (m == NULL && klass->is_instance_klass()) { 1368 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1369 } 1370 } 1371 if (m == NULL || (m->is_static() != is_static)) { 1372 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1373 } 1374 return m->jmethod_id(); 1375 } 1376 1377 1378 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1379 const char *name, const char *sig)) 1380 JNIWrapper("GetMethodID"); 1381 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1382 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1383 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1384 return ret; 1385 JNI_END 1386 1387 1388 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1389 const char *name, const char *sig)) 1390 JNIWrapper("GetStaticMethodID"); 1391 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1392 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1393 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1394 return ret; 1395 JNI_END 1396 1397 1398 1399 // 1400 // Calling Methods 1401 // 1402 1403 1404 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1405 , EntryProbe, ReturnProbe) \ 1406 \ 1407 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1408 , ReturnProbe); \ 1409 \ 1410 JNI_ENTRY(ResultType, \ 1411 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1412 JNIWrapper("Call" XSTR(Result) "Method"); \ 1413 \ 1414 EntryProbe; \ 1415 ResultType ret = 0;\ 1416 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1417 (const ResultType&)ret);\ 1418 \ 1419 va_list args; \ 1420 va_start(args, methodID); \ 1421 JavaValue jvalue(Tag); \ 1422 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1423 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1424 va_end(args); \ 1425 ret = jvalue.get_##ResultType(); \ 1426 return ret;\ 1427 JNI_END 1428 1429 // the runtime type of subword integral basic types is integer 1430 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1431 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1432 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1433 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1434 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1435 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1436 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1437 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1438 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1439 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1440 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1441 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1442 1443 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1444 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1445 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1446 DEFINE_CALLMETHOD(jint, Int, T_INT, 1447 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1448 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1449 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1450 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1451 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1452 // Float and double probes don't return value because dtrace doesn't currently support it 1453 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1454 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1455 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1456 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1457 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1458 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1459 1460 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1461 , EntryProbe, ReturnProbe) \ 1462 \ 1463 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1464 , ReturnProbe); \ 1465 \ 1466 JNI_ENTRY(ResultType, \ 1467 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1468 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1469 \ 1470 EntryProbe;\ 1471 ResultType ret = 0;\ 1472 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1473 (const ResultType&)ret);\ 1474 \ 1475 JavaValue jvalue(Tag); \ 1476 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1477 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1478 ret = jvalue.get_##ResultType(); \ 1479 return ret;\ 1480 JNI_END 1481 1482 // the runtime type of subword integral basic types is integer 1483 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1484 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1485 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1486 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1487 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1488 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1489 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1490 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1491 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1492 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1493 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1494 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1495 1496 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1497 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1498 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1499 DEFINE_CALLMETHODV(jint, Int, T_INT, 1500 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1501 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1502 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1503 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1504 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1505 // Float and double probes don't return value because dtrace doesn't currently support it 1506 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1507 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1508 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1509 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1510 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1511 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1512 1513 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1514 , EntryProbe, ReturnProbe) \ 1515 \ 1516 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1517 , ReturnProbe); \ 1518 \ 1519 JNI_ENTRY(ResultType, \ 1520 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1521 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1522 EntryProbe; \ 1523 ResultType ret = 0;\ 1524 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1525 (const ResultType&)ret);\ 1526 \ 1527 JavaValue jvalue(Tag); \ 1528 JNI_ArgumentPusherArray ap(methodID, args); \ 1529 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1530 ret = jvalue.get_##ResultType(); \ 1531 return ret;\ 1532 JNI_END 1533 1534 // the runtime type of subword integral basic types is integer 1535 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1536 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1537 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1538 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1539 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1540 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1541 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1542 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1543 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1544 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1545 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1546 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1547 1548 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1549 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1550 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1551 DEFINE_CALLMETHODA(jint, Int, T_INT, 1552 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1553 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1554 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1555 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1556 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1557 // Float and double probes don't return value because dtrace doesn't currently support it 1558 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1559 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1560 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1561 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1562 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1563 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1564 1565 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1567 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1568 1569 1570 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1571 JNIWrapper("CallVoidMethod"); 1572 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1573 DT_VOID_RETURN_MARK(CallVoidMethod); 1574 1575 va_list args; 1576 va_start(args, methodID); 1577 JavaValue jvalue(T_VOID); 1578 JNI_ArgumentPusherVaArg ap(methodID, args); 1579 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1580 va_end(args); 1581 JNI_END 1582 1583 1584 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1585 JNIWrapper("CallVoidMethodV"); 1586 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1587 DT_VOID_RETURN_MARK(CallVoidMethodV); 1588 1589 JavaValue jvalue(T_VOID); 1590 JNI_ArgumentPusherVaArg ap(methodID, args); 1591 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1592 JNI_END 1593 1594 1595 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1596 JNIWrapper("CallVoidMethodA"); 1597 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1598 DT_VOID_RETURN_MARK(CallVoidMethodA); 1599 1600 JavaValue jvalue(T_VOID); 1601 JNI_ArgumentPusherArray ap(methodID, args); 1602 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1603 JNI_END 1604 1605 1606 1607 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1608 , EntryProbe, ReturnProbe) \ 1609 \ 1610 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1611 , ReturnProbe);\ 1612 \ 1613 JNI_ENTRY(ResultType, \ 1614 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1615 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1616 \ 1617 EntryProbe;\ 1618 ResultType ret;\ 1619 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1620 (const ResultType&)ret);\ 1621 \ 1622 va_list args; \ 1623 va_start(args, methodID); \ 1624 JavaValue jvalue(Tag); \ 1625 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1626 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1627 va_end(args); \ 1628 ret = jvalue.get_##ResultType(); \ 1629 return ret;\ 1630 JNI_END 1631 1632 // the runtime type of subword integral basic types is integer 1633 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1634 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1635 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1636 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1637 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1638 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1639 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1640 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1641 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1642 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1643 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1644 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1645 1646 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1647 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1648 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1649 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1650 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1651 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1652 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1653 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1654 // Float and double probes don't return value because dtrace doesn't currently support it 1655 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1656 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1657 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1658 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1659 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1660 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1661 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1662 1663 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1664 , EntryProbe, ReturnProbe) \ 1665 \ 1666 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1667 , ReturnProbe);\ 1668 \ 1669 JNI_ENTRY(ResultType, \ 1670 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1671 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1672 \ 1673 EntryProbe;\ 1674 ResultType ret;\ 1675 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1676 (const ResultType&)ret);\ 1677 \ 1678 JavaValue jvalue(Tag); \ 1679 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1680 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1681 ret = jvalue.get_##ResultType(); \ 1682 return ret;\ 1683 JNI_END 1684 1685 // the runtime type of subword integral basic types is integer 1686 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1687 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1689 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1690 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1691 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1692 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1693 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1694 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1695 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1696 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1697 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1698 1699 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1700 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1701 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1702 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1703 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1704 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1705 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1706 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1707 // Float and double probes don't return value because dtrace doesn't currently support it 1708 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1709 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1710 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1711 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1712 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1713 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1714 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1715 1716 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1717 , EntryProbe, ReturnProbe) \ 1718 \ 1719 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1720 , ReturnProbe);\ 1721 \ 1722 JNI_ENTRY(ResultType, \ 1723 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1724 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1725 \ 1726 EntryProbe;\ 1727 ResultType ret;\ 1728 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1729 (const ResultType&)ret);\ 1730 \ 1731 JavaValue jvalue(Tag); \ 1732 JNI_ArgumentPusherArray ap(methodID, args); \ 1733 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1734 ret = jvalue.get_##ResultType(); \ 1735 return ret;\ 1736 JNI_END 1737 1738 // the runtime type of subword integral basic types is integer 1739 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1740 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1741 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1742 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1743 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1744 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1745 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1746 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1747 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1748 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1749 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1750 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1751 1752 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1753 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1754 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1755 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1756 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1757 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1758 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1759 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1760 // Float and double probes don't return value because dtrace doesn't currently support it 1761 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1762 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1763 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1764 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1765 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1766 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1767 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1768 1769 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1770 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1771 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1772 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1773 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1774 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1775 1776 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1777 JNIWrapper("CallNonvirtualVoidMethod"); 1778 1779 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1780 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1781 1782 va_list args; 1783 va_start(args, methodID); 1784 JavaValue jvalue(T_VOID); 1785 JNI_ArgumentPusherVaArg ap(methodID, args); 1786 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1787 va_end(args); 1788 JNI_END 1789 1790 1791 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1792 JNIWrapper("CallNonvirtualVoidMethodV"); 1793 1794 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1795 env, obj, cls, (uintptr_t) methodID); 1796 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1797 1798 JavaValue jvalue(T_VOID); 1799 JNI_ArgumentPusherVaArg ap(methodID, args); 1800 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1801 JNI_END 1802 1803 1804 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1805 JNIWrapper("CallNonvirtualVoidMethodA"); 1806 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1807 env, obj, cls, (uintptr_t) methodID); 1808 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1809 JavaValue jvalue(T_VOID); 1810 JNI_ArgumentPusherArray ap(methodID, args); 1811 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1812 JNI_END 1813 1814 1815 1816 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1817 , EntryProbe, ResultProbe) \ 1818 \ 1819 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1820 , ResultProbe); \ 1821 \ 1822 JNI_ENTRY(ResultType, \ 1823 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1824 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1825 \ 1826 EntryProbe; \ 1827 ResultType ret = 0;\ 1828 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1829 (const ResultType&)ret);\ 1830 \ 1831 va_list args; \ 1832 va_start(args, methodID); \ 1833 JavaValue jvalue(Tag); \ 1834 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1835 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1836 va_end(args); \ 1837 ret = jvalue.get_##ResultType(); \ 1838 return ret;\ 1839 JNI_END 1840 1841 // the runtime type of subword integral basic types is integer 1842 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1843 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1844 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1845 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1846 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1847 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1848 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1849 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1850 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1851 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1852 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1853 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1854 1855 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1856 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1857 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1858 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1859 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1860 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1861 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1862 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1863 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1864 // Float and double probes don't return value because dtrace doesn't currently support it 1865 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1866 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1867 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1868 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1869 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1870 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1871 1872 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1873 , EntryProbe, ResultProbe) \ 1874 \ 1875 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1876 , ResultProbe); \ 1877 \ 1878 JNI_ENTRY(ResultType, \ 1879 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1880 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1881 \ 1882 EntryProbe; \ 1883 ResultType ret = 0;\ 1884 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1885 (const ResultType&)ret);\ 1886 \ 1887 JavaValue jvalue(Tag); \ 1888 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1889 /* Make sure class is initialized before trying to invoke its method */ \ 1890 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1891 k->initialize(CHECK_0); \ 1892 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1893 va_end(args); \ 1894 ret = jvalue.get_##ResultType(); \ 1895 return ret;\ 1896 JNI_END 1897 1898 // the runtime type of subword integral basic types is integer 1899 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1900 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1901 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1902 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1903 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1904 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1905 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1906 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1907 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1908 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1909 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1910 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1911 1912 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1913 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1914 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1915 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1916 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1917 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1918 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1919 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1920 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1921 // Float and double probes don't return value because dtrace doesn't currently support it 1922 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1923 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1924 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1925 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1926 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1927 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1928 1929 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1930 , EntryProbe, ResultProbe) \ 1931 \ 1932 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1933 , ResultProbe); \ 1934 \ 1935 JNI_ENTRY(ResultType, \ 1936 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1937 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1938 \ 1939 EntryProbe; \ 1940 ResultType ret = 0;\ 1941 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1942 (const ResultType&)ret);\ 1943 \ 1944 JavaValue jvalue(Tag); \ 1945 JNI_ArgumentPusherArray ap(methodID, args); \ 1946 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1947 ret = jvalue.get_##ResultType(); \ 1948 return ret;\ 1949 JNI_END 1950 1951 // the runtime type of subword integral basic types is integer 1952 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1953 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1954 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1955 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1956 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1957 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1958 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1959 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1960 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1961 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1962 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1963 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1964 1965 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1966 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1967 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1968 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1969 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1970 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1971 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1972 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1973 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1974 // Float and double probes don't return value because dtrace doesn't currently support it 1975 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1976 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1977 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1978 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1979 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1980 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1981 1982 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1983 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1984 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1985 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1986 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1987 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1988 1989 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1990 JNIWrapper("CallStaticVoidMethod"); 1991 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1992 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1993 1994 va_list args; 1995 va_start(args, methodID); 1996 JavaValue jvalue(T_VOID); 1997 JNI_ArgumentPusherVaArg ap(methodID, args); 1998 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1999 va_end(args); 2000 JNI_END 2001 2002 2003 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 2004 JNIWrapper("CallStaticVoidMethodV"); 2005 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 2006 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 2007 2008 JavaValue jvalue(T_VOID); 2009 JNI_ArgumentPusherVaArg ap(methodID, args); 2010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2011 JNI_END 2012 2013 2014 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2015 JNIWrapper("CallStaticVoidMethodA"); 2016 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2017 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2018 2019 JavaValue jvalue(T_VOID); 2020 JNI_ArgumentPusherArray ap(methodID, args); 2021 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2022 JNI_END 2023 2024 2025 // 2026 // Accessing Fields 2027 // 2028 2029 2030 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2031 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2032 2033 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2034 const char *name, const char *sig)) 2035 JNIWrapper("GetFieldID"); 2036 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2037 jfieldID ret = 0; 2038 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2039 2040 // The class should have been loaded (we have an instance of the class 2041 // passed in) so the field and signature should already be in the symbol 2042 // table. If they're not there, the field doesn't exist. 2043 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2044 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2045 if (fieldname == NULL || signame == NULL) { 2046 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2047 } 2048 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2049 // Make sure class is initialized before handing id's out to fields 2050 k->initialize(CHECK_NULL); 2051 2052 fieldDescriptor fd; 2053 if (!k->is_instance_klass() || 2054 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2055 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2056 } 2057 2058 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2059 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2060 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2061 return ret; 2062 JNI_END 2063 2064 2065 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2066 JNIWrapper("GetObjectField"); 2067 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2068 oop o = JNIHandles::resolve_non_null(obj); 2069 Klass* k = o->klass(); 2070 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2071 // Keep JVMTI addition small and only check enabled flag here. 2072 // jni_GetField_probe() assumes that is okay to create handles. 2073 if (JvmtiExport::should_post_field_access()) { 2074 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2075 } 2076 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2077 #if INCLUDE_ALL_GCS 2078 // If G1 is enabled and we are accessing the value of the referent 2079 // field in a reference object then we need to register a non-null 2080 // referent with the SATB barrier. 2081 if (UseG1GC) { 2082 bool needs_barrier = false; 2083 2084 if (ret != NULL && 2085 offset == java_lang_ref_Reference::referent_offset && 2086 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2087 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2088 needs_barrier = true; 2089 } 2090 2091 if (needs_barrier) { 2092 oop referent = JNIHandles::resolve(ret); 2093 G1SATBCardTableModRefBS::enqueue(referent); 2094 } 2095 } 2096 #endif // INCLUDE_ALL_GCS 2097 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2098 return ret; 2099 JNI_END 2100 2101 2102 2103 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2104 , EntryProbe, ReturnProbe) \ 2105 \ 2106 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2107 , ReturnProbe); \ 2108 \ 2109 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2110 JNIWrapper("Get" XSTR(Result) "Field"); \ 2111 \ 2112 EntryProbe; \ 2113 Return ret = 0;\ 2114 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2115 \ 2116 oop o = JNIHandles::resolve_non_null(obj); \ 2117 Klass* k = o->klass(); \ 2118 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2119 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2120 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2121 /* and creates a ResetNoHandleMark. */ \ 2122 if (JvmtiExport::should_post_field_access()) { \ 2123 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2124 } \ 2125 ret = o->Fieldname##_field(offset); \ 2126 return ret; \ 2127 JNI_END 2128 2129 DEFINE_GETFIELD(jboolean, bool, Boolean 2130 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2131 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2132 DEFINE_GETFIELD(jbyte, byte, Byte 2133 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2134 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2135 DEFINE_GETFIELD(jchar, char, Char 2136 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2137 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2138 DEFINE_GETFIELD(jshort, short, Short 2139 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2140 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2141 DEFINE_GETFIELD(jint, int, Int 2142 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2143 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2144 DEFINE_GETFIELD(jlong, long, Long 2145 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2146 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2147 // Float and double probes don't return value because dtrace doesn't currently support it 2148 DEFINE_GETFIELD(jfloat, float, Float 2149 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2150 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2151 DEFINE_GETFIELD(jdouble, double, Double 2152 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2153 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2154 2155 address jni_GetBooleanField_addr() { 2156 return (address)jni_GetBooleanField; 2157 } 2158 address jni_GetByteField_addr() { 2159 return (address)jni_GetByteField; 2160 } 2161 address jni_GetCharField_addr() { 2162 return (address)jni_GetCharField; 2163 } 2164 address jni_GetShortField_addr() { 2165 return (address)jni_GetShortField; 2166 } 2167 address jni_GetIntField_addr() { 2168 return (address)jni_GetIntField; 2169 } 2170 address jni_GetLongField_addr() { 2171 return (address)jni_GetLongField; 2172 } 2173 address jni_GetFloatField_addr() { 2174 return (address)jni_GetFloatField; 2175 } 2176 address jni_GetDoubleField_addr() { 2177 return (address)jni_GetDoubleField; 2178 } 2179 2180 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2181 JNIWrapper("SetObjectField"); 2182 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2183 oop o = JNIHandles::resolve_non_null(obj); 2184 Klass* k = o->klass(); 2185 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2186 // Keep JVMTI addition small and only check enabled flag here. 2187 // jni_SetField_probe_nh() assumes that is not okay to create handles 2188 // and creates a ResetNoHandleMark. 2189 if (JvmtiExport::should_post_field_modification()) { 2190 jvalue field_value; 2191 field_value.l = value; 2192 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2193 } 2194 o->obj_field_put(offset, JNIHandles::resolve(value)); 2195 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2196 JNI_END 2197 2198 2199 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2200 , EntryProbe, ReturnProbe) \ 2201 \ 2202 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2203 JNIWrapper("Set" XSTR(Result) "Field"); \ 2204 \ 2205 EntryProbe; \ 2206 \ 2207 oop o = JNIHandles::resolve_non_null(obj); \ 2208 Klass* k = o->klass(); \ 2209 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2210 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2211 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2212 /* and creates a ResetNoHandleMark. */ \ 2213 if (JvmtiExport::should_post_field_modification()) { \ 2214 jvalue field_value; \ 2215 field_value.unionType = value; \ 2216 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2217 } \ 2218 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2219 o->Fieldname##_field_put(offset, value); \ 2220 ReturnProbe; \ 2221 JNI_END 2222 2223 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2224 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2225 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2226 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2227 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2228 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2229 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2230 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2231 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2232 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2233 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2234 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2235 DEFINE_SETFIELD(jint, int, Int, 'I', i 2236 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2237 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2238 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2239 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2240 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2241 // Float and double probes don't return value because dtrace doesn't currently support it 2242 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2243 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2244 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2245 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2246 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2247 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2248 2249 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2250 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2251 2252 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2253 JNIWrapper("ToReflectedField"); 2254 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2255 jobject ret = NULL; 2256 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2257 2258 fieldDescriptor fd; 2259 bool found = false; 2260 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2261 2262 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2263 2264 if (isStatic) { 2265 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2266 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2267 assert(id->is_static_field_id(), "invalid static field id"); 2268 found = id->find_local_field(&fd); 2269 } else { 2270 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2271 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2272 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2273 } 2274 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2275 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2276 ret = JNIHandles::make_local(env, reflected); 2277 return ret; 2278 JNI_END 2279 2280 2281 // 2282 // Accessing Static Fields 2283 // 2284 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2285 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2286 2287 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2288 const char *name, const char *sig)) 2289 JNIWrapper("GetStaticFieldID"); 2290 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2291 jfieldID ret = NULL; 2292 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2293 2294 // The class should have been loaded (we have an instance of the class 2295 // passed in) so the field and signature should already be in the symbol 2296 // table. If they're not there, the field doesn't exist. 2297 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2298 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2299 if (fieldname == NULL || signame == NULL) { 2300 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2301 } 2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2303 // Make sure class is initialized before handing id's out to static fields 2304 k->initialize(CHECK_NULL); 2305 2306 fieldDescriptor fd; 2307 if (!k->is_instance_klass() || 2308 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2309 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2310 } 2311 2312 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2313 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2314 debug_only(id->set_is_static_field_id();) 2315 2316 debug_only(id->verify(fd.field_holder())); 2317 2318 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2319 return ret; 2320 JNI_END 2321 2322 2323 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2324 JNIWrapper("GetStaticObjectField"); 2325 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2326 #if INCLUDE_JNI_CHECK 2327 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2328 #endif // INCLUDE_JNI_CHECK 2329 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2330 assert(id->is_static_field_id(), "invalid static field id"); 2331 // Keep JVMTI addition small and only check enabled flag here. 2332 // jni_GetField_probe() assumes that is okay to create handles. 2333 if (JvmtiExport::should_post_field_access()) { 2334 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2335 } 2336 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2337 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2338 return ret; 2339 JNI_END 2340 2341 2342 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2343 , EntryProbe, ReturnProbe) \ 2344 \ 2345 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2346 , ReturnProbe); \ 2347 \ 2348 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2349 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2350 EntryProbe; \ 2351 Return ret = 0;\ 2352 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2353 (const Return&)ret);\ 2354 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2355 assert(id->is_static_field_id(), "invalid static field id"); \ 2356 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2357 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2358 if (JvmtiExport::should_post_field_access()) { \ 2359 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2360 } \ 2361 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2362 return ret;\ 2363 JNI_END 2364 2365 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2366 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2367 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2368 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2369 DEFINE_GETSTATICFIELD(jchar, char, Char 2370 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2371 DEFINE_GETSTATICFIELD(jshort, short, Short 2372 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2373 DEFINE_GETSTATICFIELD(jint, int, Int 2374 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2375 DEFINE_GETSTATICFIELD(jlong, long, Long 2376 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2377 // Float and double probes don't return value because dtrace doesn't currently support it 2378 DEFINE_GETSTATICFIELD(jfloat, float, Float 2379 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2380 DEFINE_GETSTATICFIELD(jdouble, double, Double 2381 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2382 2383 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2384 JNIWrapper("SetStaticObjectField"); 2385 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2386 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2387 assert(id->is_static_field_id(), "invalid static field id"); 2388 // Keep JVMTI addition small and only check enabled flag here. 2389 // jni_SetField_probe() assumes that is okay to create handles. 2390 if (JvmtiExport::should_post_field_modification()) { 2391 jvalue field_value; 2392 field_value.l = value; 2393 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2394 } 2395 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2396 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2397 JNI_END 2398 2399 2400 2401 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2402 , EntryProbe, ReturnProbe) \ 2403 \ 2404 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2405 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2406 EntryProbe; \ 2407 \ 2408 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2409 assert(id->is_static_field_id(), "invalid static field id"); \ 2410 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2411 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2412 if (JvmtiExport::should_post_field_modification()) { \ 2413 jvalue field_value; \ 2414 field_value.unionType = value; \ 2415 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2416 } \ 2417 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2418 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2419 ReturnProbe;\ 2420 JNI_END 2421 2422 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2423 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2424 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2425 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2426 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2427 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2428 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2429 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2430 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2431 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2432 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2433 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2434 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2435 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2436 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2437 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2438 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2439 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2440 // Float and double probes don't return value because dtrace doesn't currently support it 2441 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2442 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2443 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2444 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2445 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2446 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2447 2448 // 2449 // String Operations 2450 // 2451 2452 // Unicode Interface 2453 2454 DT_RETURN_MARK_DECL(NewString, jstring 2455 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2456 2457 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2458 JNIWrapper("NewString"); 2459 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2460 jstring ret = NULL; 2461 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2462 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2463 ret = (jstring) JNIHandles::make_local(env, string); 2464 return ret; 2465 JNI_END 2466 2467 2468 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2469 JNIWrapper("GetStringLength"); 2470 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2471 jsize ret = 0; 2472 oop s = JNIHandles::resolve_non_null(string); 2473 if (java_lang_String::value(s) != NULL) { 2474 ret = java_lang_String::length(s); 2475 } 2476 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2477 return ret; 2478 JNI_END 2479 2480 2481 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2482 JNIEnv *env, jstring string, jboolean *isCopy)) 2483 JNIWrapper("GetStringChars"); 2484 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2485 jchar* buf = NULL; 2486 oop s = JNIHandles::resolve_non_null(string); 2487 typeArrayOop s_value = java_lang_String::value(s); 2488 if (s_value != NULL) { 2489 int s_len = java_lang_String::length(s); 2490 bool is_latin1 = java_lang_String::is_latin1(s); 2491 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2492 /* JNI Specification states return NULL on OOM */ 2493 if (buf != NULL) { 2494 if (s_len > 0) { 2495 if (!is_latin1) { 2496 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2497 } else { 2498 for (int i = 0; i < s_len; i++) { 2499 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2500 } 2501 } 2502 } 2503 buf[s_len] = 0; 2504 //%note jni_5 2505 if (isCopy != NULL) { 2506 *isCopy = JNI_TRUE; 2507 } 2508 } 2509 } 2510 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2511 return buf; 2512 JNI_END 2513 2514 2515 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2516 JNIWrapper("ReleaseStringChars"); 2517 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2518 //%note jni_6 2519 if (chars != NULL) { 2520 // Since String objects are supposed to be immutable, don't copy any 2521 // new data back. A bad user will have to go after the char array. 2522 FreeHeap((void*) chars); 2523 } 2524 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2525 JNI_END 2526 2527 2528 // UTF Interface 2529 2530 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2531 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2532 2533 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2534 JNIWrapper("NewStringUTF"); 2535 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2536 jstring ret; 2537 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2538 2539 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2540 ret = (jstring) JNIHandles::make_local(env, result); 2541 return ret; 2542 JNI_END 2543 2544 2545 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2546 JNIWrapper("GetStringUTFLength"); 2547 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2548 jsize ret = 0; 2549 oop java_string = JNIHandles::resolve_non_null(string); 2550 if (java_lang_String::value(java_string) != NULL) { 2551 ret = java_lang_String::utf8_length(java_string); 2552 } 2553 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2554 return ret; 2555 JNI_END 2556 2557 2558 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2559 JNIWrapper("GetStringUTFChars"); 2560 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2561 char* result = NULL; 2562 oop java_string = JNIHandles::resolve_non_null(string); 2563 if (java_lang_String::value(java_string) != NULL) { 2564 size_t length = java_lang_String::utf8_length(java_string); 2565 /* JNI Specification states return NULL on OOM */ 2566 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2567 if (result != NULL) { 2568 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2569 if (isCopy != NULL) { 2570 *isCopy = JNI_TRUE; 2571 } 2572 } 2573 } 2574 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2575 return result; 2576 JNI_END 2577 2578 2579 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2580 JNIWrapper("ReleaseStringUTFChars"); 2581 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2582 if (chars != NULL) { 2583 FreeHeap((char*) chars); 2584 } 2585 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2586 JNI_END 2587 2588 2589 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2590 JNIWrapper("GetArrayLength"); 2591 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2592 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2593 assert(a->is_array(), "must be array"); 2594 jsize ret = a->length(); 2595 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2596 return ret; 2597 JNI_END 2598 2599 2600 // 2601 // Object Array Operations 2602 // 2603 2604 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2605 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2606 2607 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2608 JNIWrapper("NewObjectArray"); 2609 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2610 jobjectArray ret = NULL; 2611 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2612 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2613 Klass* ak = ek->array_klass(CHECK_NULL); 2614 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2615 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2616 oop initial_value = JNIHandles::resolve(initialElement); 2617 if (initial_value != NULL) { // array already initialized with NULL 2618 for (int index = 0; index < length; index++) { 2619 result->obj_at_put(index, initial_value); 2620 } 2621 } 2622 ret = (jobjectArray) JNIHandles::make_local(env, result); 2623 return ret; 2624 JNI_END 2625 2626 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2627 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2628 2629 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2630 JNIWrapper("GetObjectArrayElement"); 2631 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2632 jobject ret = NULL; 2633 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2634 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2635 if (a->is_within_bounds(index)) { 2636 ret = JNIHandles::make_local(env, a->obj_at(index)); 2637 return ret; 2638 } else { 2639 char buf[jintAsStringSize]; 2640 sprintf(buf, "%d", index); 2641 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2642 } 2643 JNI_END 2644 2645 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2646 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2647 2648 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2649 JNIWrapper("SetObjectArrayElement"); 2650 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2651 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2652 2653 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2654 oop v = JNIHandles::resolve(value); 2655 if (a->is_within_bounds(index)) { 2656 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2657 a->obj_at_put(index, v); 2658 } else { 2659 THROW(vmSymbols::java_lang_ArrayStoreException()); 2660 } 2661 } else { 2662 char buf[jintAsStringSize]; 2663 sprintf(buf, "%d", index); 2664 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2665 } 2666 JNI_END 2667 2668 2669 2670 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2671 ,EntryProbe,ReturnProbe) \ 2672 \ 2673 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2674 , ReturnProbe); \ 2675 \ 2676 JNI_ENTRY(Return, \ 2677 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2678 JNIWrapper("New" XSTR(Result) "Array"); \ 2679 EntryProbe; \ 2680 Return ret = NULL;\ 2681 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2682 \ 2683 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2684 ret = (Return) JNIHandles::make_local(env, obj); \ 2685 return ret;\ 2686 JNI_END 2687 2688 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2689 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2690 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2691 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2692 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2693 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2694 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2695 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2696 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2697 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2698 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2699 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2700 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2701 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2702 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2703 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2704 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2705 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2706 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2707 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2708 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2709 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2710 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2711 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2712 2713 // Return an address which will fault if the caller writes to it. 2714 2715 static char* get_bad_address() { 2716 static char* bad_address = NULL; 2717 if (bad_address == NULL) { 2718 size_t size = os::vm_allocation_granularity(); 2719 bad_address = os::reserve_memory(size); 2720 if (bad_address != NULL) { 2721 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2722 /*is_committed*/false); 2723 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2724 } 2725 } 2726 return bad_address; 2727 } 2728 2729 2730 2731 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2732 , EntryProbe, ReturnProbe) \ 2733 \ 2734 JNI_QUICK_ENTRY(ElementType*, \ 2735 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2736 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2737 EntryProbe; \ 2738 /* allocate an chunk of memory in c land */ \ 2739 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2740 ElementType* result; \ 2741 int len = a->length(); \ 2742 if (len == 0) { \ 2743 /* Empty array: legal but useless, can't return NULL. \ 2744 * Return a pointer to something useless. \ 2745 * Avoid asserts in typeArrayOop. */ \ 2746 result = (ElementType*)get_bad_address(); \ 2747 } else { \ 2748 /* JNI Specification states return NULL on OOM */ \ 2749 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2750 if (result != NULL) { \ 2751 /* copy the array to the c chunk */ \ 2752 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2753 if (isCopy) { \ 2754 *isCopy = JNI_TRUE; \ 2755 } \ 2756 } \ 2757 } \ 2758 ReturnProbe; \ 2759 return result; \ 2760 JNI_END 2761 2762 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2763 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2764 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2765 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2766 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2767 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2768 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2769 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2770 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2771 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2772 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2773 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2774 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2775 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2776 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2777 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2778 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2779 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2780 // Float and double probes don't return value because dtrace doesn't currently support it 2781 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2782 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2783 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2784 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2785 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2786 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2787 2788 2789 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2790 , EntryProbe, ReturnProbe);\ 2791 \ 2792 JNI_QUICK_ENTRY(void, \ 2793 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2794 ElementType *buf, jint mode)) \ 2795 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2796 EntryProbe; \ 2797 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2798 int len = a->length(); \ 2799 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2800 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2801 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2802 } \ 2803 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2804 FreeHeap(buf); \ 2805 } \ 2806 } \ 2807 ReturnProbe; \ 2808 JNI_END 2809 2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2811 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2812 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2814 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2815 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2817 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2818 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2820 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2821 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2823 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2824 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2826 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2827 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2828 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2829 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2830 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2831 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2832 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2833 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2834 2835 2836 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2837 , EntryProbe, ReturnProbe); \ 2838 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2839 , ReturnProbe); \ 2840 \ 2841 JNI_ENTRY(void, \ 2842 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2843 jsize len, ElementType *buf)) \ 2844 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2845 EntryProbe; \ 2846 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2847 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2848 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2849 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2850 } else { \ 2851 if (len > 0) { \ 2852 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2853 memcpy((u_char*) buf, \ 2854 (u_char*) src->Tag##_at_addr(start), \ 2855 len << sc); \ 2856 } \ 2857 } \ 2858 JNI_END 2859 2860 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2861 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2862 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2863 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2864 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2865 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2866 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2867 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2868 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2869 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2870 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2871 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2872 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2873 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2874 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2875 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2876 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2877 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2878 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2879 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2880 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2881 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2882 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2883 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2884 2885 2886 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2887 , EntryProbe, ReturnProbe); \ 2888 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2889 ,ReturnProbe); \ 2890 \ 2891 JNI_ENTRY(void, \ 2892 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2893 jsize len, const ElementType *buf)) \ 2894 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2895 EntryProbe; \ 2896 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2897 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2898 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2899 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2900 } else { \ 2901 if (len > 0) { \ 2902 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2903 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2904 (u_char*) buf, \ 2905 len << sc); \ 2906 } \ 2907 } \ 2908 JNI_END 2909 2910 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2911 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2912 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2913 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2914 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2915 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2916 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2917 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2918 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2919 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2920 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2921 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2922 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2923 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2924 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2925 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2926 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2927 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2928 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2929 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2930 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2931 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2932 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2933 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2934 2935 2936 // 2937 // Interception of natives 2938 // 2939 2940 // The RegisterNatives call being attempted tried to register with a method that 2941 // is not native. Ask JVM TI what prefixes have been specified. Then check 2942 // to see if the native method is now wrapped with the prefixes. See the 2943 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2944 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2945 #if INCLUDE_JVMTI 2946 ResourceMark rm(THREAD); 2947 Method* method; 2948 int name_len = name->utf8_length(); 2949 char* name_str = name->as_utf8(); 2950 int prefix_count; 2951 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2952 for (int i = 0; i < prefix_count; i++) { 2953 char* prefix = prefixes[i]; 2954 int prefix_len = (int)strlen(prefix); 2955 2956 // try adding this prefix to the method name and see if it matches another method name 2957 int trial_len = name_len + prefix_len; 2958 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2959 strcpy(trial_name_str, prefix); 2960 strcat(trial_name_str, name_str); 2961 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2962 if (trial_name == NULL) { 2963 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2964 } 2965 method = k->lookup_method(trial_name, signature); 2966 if (method == NULL) { 2967 continue; // signature doesn't match, try the next prefix 2968 } 2969 if (method->is_native()) { 2970 method->set_is_prefixed_native(); 2971 return method; // wahoo, we found a prefixed version of the method, return it 2972 } 2973 // found as non-native, so prefix is good, add it, probably just need more prefixes 2974 name_len = trial_len; 2975 name_str = trial_name_str; 2976 } 2977 #endif // INCLUDE_JVMTI 2978 return NULL; // not found 2979 } 2980 2981 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2982 Method* method = k->lookup_method(name, signature); 2983 if (method == NULL) { 2984 ResourceMark rm; 2985 stringStream st; 2986 st.print("Method %s name or signature does not match", 2987 Method::name_and_sig_as_C_string(k, name, signature)); 2988 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2989 } 2990 if (!method->is_native()) { 2991 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2992 method = find_prefixed_native(k, name, signature, THREAD); 2993 if (method == NULL) { 2994 ResourceMark rm; 2995 stringStream st; 2996 st.print("Method %s is not declared as native", 2997 Method::name_and_sig_as_C_string(k, name, signature)); 2998 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2999 } 3000 } 3001 3002 if (entry != NULL) { 3003 method->set_native_function(entry, 3004 Method::native_bind_event_is_interesting); 3005 } else { 3006 method->clear_native_function(); 3007 } 3008 if (PrintJNIResolving) { 3009 ResourceMark rm(THREAD); 3010 tty->print_cr("[Registering JNI native method %s.%s]", 3011 method->method_holder()->external_name(), 3012 method->name()->as_C_string()); 3013 } 3014 return true; 3015 } 3016 3017 DT_RETURN_MARK_DECL(RegisterNatives, jint 3018 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3019 3020 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3021 const JNINativeMethod *methods, 3022 jint nMethods)) 3023 JNIWrapper("RegisterNatives"); 3024 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3025 jint ret = 0; 3026 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3027 3028 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3029 3030 for (int index = 0; index < nMethods; index++) { 3031 const char* meth_name = methods[index].name; 3032 const char* meth_sig = methods[index].signature; 3033 int meth_name_len = (int)strlen(meth_name); 3034 3035 // The class should have been loaded (we have an instance of the class 3036 // passed in) so the method and signature should already be in the symbol 3037 // table. If they're not there, the method doesn't exist. 3038 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3039 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3040 3041 if (name == NULL || signature == NULL) { 3042 ResourceMark rm; 3043 stringStream st; 3044 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3045 // Must return negative value on failure 3046 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3047 } 3048 3049 bool res = register_native(k, name, signature, 3050 (address) methods[index].fnPtr, THREAD); 3051 if (!res) { 3052 ret = -1; 3053 break; 3054 } 3055 } 3056 return ret; 3057 JNI_END 3058 3059 3060 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3061 JNIWrapper("UnregisterNatives"); 3062 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3063 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3064 //%note jni_2 3065 if (k->is_instance_klass()) { 3066 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3067 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3068 if (m->is_native()) { 3069 m->clear_native_function(); 3070 m->set_signature_handler(NULL); 3071 } 3072 } 3073 } 3074 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3075 return 0; 3076 JNI_END 3077 3078 // 3079 // Monitor functions 3080 // 3081 3082 DT_RETURN_MARK_DECL(MonitorEnter, jint 3083 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3084 3085 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3086 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3087 jint ret = JNI_ERR; 3088 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3089 3090 // If the object is null, we can't do anything with it 3091 if (jobj == NULL) { 3092 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3093 } 3094 3095 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3096 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3097 ret = JNI_OK; 3098 return ret; 3099 JNI_END 3100 3101 DT_RETURN_MARK_DECL(MonitorExit, jint 3102 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3103 3104 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3105 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3106 jint ret = JNI_ERR; 3107 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3108 3109 // Don't do anything with a null object 3110 if (jobj == NULL) { 3111 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3112 } 3113 3114 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3115 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3116 3117 ret = JNI_OK; 3118 return ret; 3119 JNI_END 3120 3121 // 3122 // Extensions 3123 // 3124 3125 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3126 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3127 3128 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3129 JNIWrapper("GetStringRegion"); 3130 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3131 DT_VOID_RETURN_MARK(GetStringRegion); 3132 oop s = JNIHandles::resolve_non_null(string); 3133 int s_len = java_lang_String::length(s); 3134 if (start < 0 || len < 0 || start + len > s_len) { 3135 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3136 } else { 3137 if (len > 0) { 3138 typeArrayOop s_value = java_lang_String::value(s); 3139 bool is_latin1 = java_lang_String::is_latin1(s); 3140 if (!is_latin1) { 3141 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3142 } else { 3143 for (int i = 0; i < len; i++) { 3144 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3145 } 3146 } 3147 } 3148 } 3149 JNI_END 3150 3151 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3152 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3153 3154 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3155 JNIWrapper("GetStringUTFRegion"); 3156 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3157 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3158 oop s = JNIHandles::resolve_non_null(string); 3159 int s_len = java_lang_String::length(s); 3160 if (start < 0 || len < 0 || start + len > s_len) { 3161 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3162 } else { 3163 //%note jni_7 3164 if (len > 0) { 3165 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3166 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3167 // as_utf8_string null-terminates the result string 3168 } else { 3169 // JDK null-terminates the buffer even in len is zero 3170 if (buf != NULL) { 3171 buf[0] = 0; 3172 } 3173 } 3174 } 3175 JNI_END 3176 3177 3178 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3179 JNIWrapper("GetPrimitiveArrayCritical"); 3180 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3181 GCLocker::lock_critical(thread); 3182 if (isCopy != NULL) { 3183 *isCopy = JNI_FALSE; 3184 } 3185 oop a = JNIHandles::resolve_non_null(array); 3186 assert(a->is_array(), "just checking"); 3187 BasicType type; 3188 if (a->is_objArray()) { 3189 type = T_OBJECT; 3190 } else { 3191 type = TypeArrayKlass::cast(a->klass())->element_type(); 3192 } 3193 void* ret = arrayOop(a)->base(type); 3194 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3195 return ret; 3196 JNI_END 3197 3198 3199 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3200 JNIWrapper("ReleasePrimitiveArrayCritical"); 3201 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3202 // The array, carray and mode arguments are ignored 3203 GCLocker::unlock_critical(thread); 3204 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3205 JNI_END 3206 3207 3208 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3209 JNIWrapper("GetStringCritical"); 3210 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3211 GCLocker::lock_critical(thread); 3212 oop s = JNIHandles::resolve_non_null(string); 3213 typeArrayOop s_value = java_lang_String::value(s); 3214 bool is_latin1 = java_lang_String::is_latin1(s); 3215 if (isCopy != NULL) { 3216 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3217 } 3218 jchar* ret; 3219 if (!is_latin1) { 3220 ret = (jchar*) s_value->base(T_CHAR); 3221 } else { 3222 // Inflate latin1 encoded string to UTF16 3223 int s_len = java_lang_String::length(s); 3224 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3225 /* JNI Specification states return NULL on OOM */ 3226 if (ret != NULL) { 3227 for (int i = 0; i < s_len; i++) { 3228 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3229 } 3230 ret[s_len] = 0; 3231 } 3232 } 3233 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3234 return ret; 3235 JNI_END 3236 3237 3238 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3239 JNIWrapper("ReleaseStringCritical"); 3240 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3241 // The str and chars arguments are ignored for UTF16 strings 3242 oop s = JNIHandles::resolve_non_null(str); 3243 bool is_latin1 = java_lang_String::is_latin1(s); 3244 if (is_latin1) { 3245 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3246 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3247 FREE_C_HEAP_ARRAY(jchar, chars); 3248 } 3249 GCLocker::unlock_critical(thread); 3250 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3251 JNI_END 3252 3253 3254 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3255 JNIWrapper("jni_NewWeakGlobalRef"); 3256 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3257 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3258 jweak ret = JNIHandles::make_weak_global(ref_handle); 3259 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3260 return ret; 3261 JNI_END 3262 3263 // Must be JNI_ENTRY (with HandleMark) 3264 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3265 JNIWrapper("jni_DeleteWeakGlobalRef"); 3266 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3267 JNIHandles::destroy_weak_global(ref); 3268 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3269 JNI_END 3270 3271 3272 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3273 JNIWrapper("jni_ExceptionCheck"); 3274 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3275 jni_check_async_exceptions(thread); 3276 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3277 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3278 return ret; 3279 JNI_END 3280 3281 3282 // Initialization state for three routines below relating to 3283 // java.nio.DirectBuffers 3284 static jint directBufferSupportInitializeStarted = 0; 3285 static volatile jint directBufferSupportInitializeEnded = 0; 3286 static volatile jint directBufferSupportInitializeFailed = 0; 3287 static jclass bufferClass = NULL; 3288 static jclass directBufferClass = NULL; 3289 static jclass directByteBufferClass = NULL; 3290 static jmethodID directByteBufferConstructor = NULL; 3291 static jfieldID directBufferAddressField = NULL; 3292 static jfieldID bufferCapacityField = NULL; 3293 3294 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3295 Handle loader; // null (bootstrap) loader 3296 Handle protection_domain; // null protection domain 3297 3298 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3299 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3300 3301 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3302 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3303 } 3304 return result; 3305 } 3306 3307 // These lookups are done with the NULL (bootstrap) ClassLoader to 3308 // circumvent any security checks that would be done by jni_FindClass. 3309 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3310 { 3311 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3312 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3313 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3314 return true; 3315 } 3316 JNI_END 3317 3318 3319 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3320 if (directBufferSupportInitializeFailed) { 3321 return false; 3322 } 3323 3324 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3325 if (!lookupDirectBufferClasses(env)) { 3326 directBufferSupportInitializeFailed = 1; 3327 return false; 3328 } 3329 3330 // Make global references for these 3331 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3332 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3333 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3334 3335 // Get needed field and method IDs 3336 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3337 if (env->ExceptionCheck()) { 3338 env->ExceptionClear(); 3339 directBufferSupportInitializeFailed = 1; 3340 return false; 3341 } 3342 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3343 if (env->ExceptionCheck()) { 3344 env->ExceptionClear(); 3345 directBufferSupportInitializeFailed = 1; 3346 return false; 3347 } 3348 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3349 if (env->ExceptionCheck()) { 3350 env->ExceptionClear(); 3351 directBufferSupportInitializeFailed = 1; 3352 return false; 3353 } 3354 3355 if ((directByteBufferConstructor == NULL) || 3356 (directBufferAddressField == NULL) || 3357 (bufferCapacityField == NULL)) { 3358 directBufferSupportInitializeFailed = 1; 3359 return false; 3360 } 3361 3362 directBufferSupportInitializeEnded = 1; 3363 } else { 3364 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3365 os::naked_yield(); 3366 } 3367 } 3368 3369 return !directBufferSupportInitializeFailed; 3370 } 3371 3372 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3373 { 3374 // thread_from_jni_environment() will block if VM is gone. 3375 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3376 3377 JNIWrapper("jni_NewDirectByteBuffer"); 3378 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3379 3380 if (!directBufferSupportInitializeEnded) { 3381 if (!initializeDirectBufferSupport(env, thread)) { 3382 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3383 return NULL; 3384 } 3385 } 3386 3387 // Being paranoid about accidental sign extension on address 3388 jlong addr = (jlong) ((uintptr_t) address); 3389 // NOTE that package-private DirectByteBuffer constructor currently 3390 // takes int capacity 3391 jint cap = (jint) capacity; 3392 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3393 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3394 return ret; 3395 } 3396 3397 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3398 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3399 3400 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3401 { 3402 // thread_from_jni_environment() will block if VM is gone. 3403 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3404 3405 JNIWrapper("jni_GetDirectBufferAddress"); 3406 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3407 void* ret = NULL; 3408 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3409 3410 if (!directBufferSupportInitializeEnded) { 3411 if (!initializeDirectBufferSupport(env, thread)) { 3412 return 0; 3413 } 3414 } 3415 3416 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3417 return 0; 3418 } 3419 3420 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3421 return ret; 3422 } 3423 3424 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3425 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3426 3427 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3428 { 3429 // thread_from_jni_environment() will block if VM is gone. 3430 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3431 3432 JNIWrapper("jni_GetDirectBufferCapacity"); 3433 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3434 jlong ret = -1; 3435 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3436 3437 if (!directBufferSupportInitializeEnded) { 3438 if (!initializeDirectBufferSupport(env, thread)) { 3439 ret = 0; 3440 return ret; 3441 } 3442 } 3443 3444 if (buf == NULL) { 3445 return -1; 3446 } 3447 3448 if (!env->IsInstanceOf(buf, directBufferClass)) { 3449 return -1; 3450 } 3451 3452 // NOTE that capacity is currently an int in the implementation 3453 ret = env->GetIntField(buf, bufferCapacityField); 3454 return ret; 3455 } 3456 3457 3458 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3459 JNIWrapper("GetVersion"); 3460 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3461 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3462 return CurrentVersion; 3463 JNI_END 3464 3465 extern struct JavaVM_ main_vm; 3466 3467 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3468 JNIWrapper("jni_GetJavaVM"); 3469 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3470 *vm = (JavaVM *)(&main_vm); 3471 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3472 return JNI_OK; 3473 JNI_END 3474 3475 3476 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3477 JNIWrapper("GetModule"); 3478 return Modules::get_module(clazz, THREAD); 3479 JNI_END 3480 3481 3482 // Structure containing all jni functions 3483 struct JNINativeInterface_ jni_NativeInterface = { 3484 NULL, 3485 NULL, 3486 NULL, 3487 3488 NULL, 3489 3490 jni_GetVersion, 3491 3492 jni_DefineClass, 3493 jni_FindClass, 3494 3495 jni_FromReflectedMethod, 3496 jni_FromReflectedField, 3497 3498 jni_ToReflectedMethod, 3499 3500 jni_GetSuperclass, 3501 jni_IsAssignableFrom, 3502 3503 jni_ToReflectedField, 3504 3505 jni_Throw, 3506 jni_ThrowNew, 3507 jni_ExceptionOccurred, 3508 jni_ExceptionDescribe, 3509 jni_ExceptionClear, 3510 jni_FatalError, 3511 3512 jni_PushLocalFrame, 3513 jni_PopLocalFrame, 3514 3515 jni_NewGlobalRef, 3516 jni_DeleteGlobalRef, 3517 jni_DeleteLocalRef, 3518 jni_IsSameObject, 3519 3520 jni_NewLocalRef, 3521 jni_EnsureLocalCapacity, 3522 3523 jni_AllocObject, 3524 jni_NewObject, 3525 jni_NewObjectV, 3526 jni_NewObjectA, 3527 3528 jni_GetObjectClass, 3529 jni_IsInstanceOf, 3530 3531 jni_GetMethodID, 3532 3533 jni_CallObjectMethod, 3534 jni_CallObjectMethodV, 3535 jni_CallObjectMethodA, 3536 jni_CallBooleanMethod, 3537 jni_CallBooleanMethodV, 3538 jni_CallBooleanMethodA, 3539 jni_CallByteMethod, 3540 jni_CallByteMethodV, 3541 jni_CallByteMethodA, 3542 jni_CallCharMethod, 3543 jni_CallCharMethodV, 3544 jni_CallCharMethodA, 3545 jni_CallShortMethod, 3546 jni_CallShortMethodV, 3547 jni_CallShortMethodA, 3548 jni_CallIntMethod, 3549 jni_CallIntMethodV, 3550 jni_CallIntMethodA, 3551 jni_CallLongMethod, 3552 jni_CallLongMethodV, 3553 jni_CallLongMethodA, 3554 jni_CallFloatMethod, 3555 jni_CallFloatMethodV, 3556 jni_CallFloatMethodA, 3557 jni_CallDoubleMethod, 3558 jni_CallDoubleMethodV, 3559 jni_CallDoubleMethodA, 3560 jni_CallVoidMethod, 3561 jni_CallVoidMethodV, 3562 jni_CallVoidMethodA, 3563 3564 jni_CallNonvirtualObjectMethod, 3565 jni_CallNonvirtualObjectMethodV, 3566 jni_CallNonvirtualObjectMethodA, 3567 jni_CallNonvirtualBooleanMethod, 3568 jni_CallNonvirtualBooleanMethodV, 3569 jni_CallNonvirtualBooleanMethodA, 3570 jni_CallNonvirtualByteMethod, 3571 jni_CallNonvirtualByteMethodV, 3572 jni_CallNonvirtualByteMethodA, 3573 jni_CallNonvirtualCharMethod, 3574 jni_CallNonvirtualCharMethodV, 3575 jni_CallNonvirtualCharMethodA, 3576 jni_CallNonvirtualShortMethod, 3577 jni_CallNonvirtualShortMethodV, 3578 jni_CallNonvirtualShortMethodA, 3579 jni_CallNonvirtualIntMethod, 3580 jni_CallNonvirtualIntMethodV, 3581 jni_CallNonvirtualIntMethodA, 3582 jni_CallNonvirtualLongMethod, 3583 jni_CallNonvirtualLongMethodV, 3584 jni_CallNonvirtualLongMethodA, 3585 jni_CallNonvirtualFloatMethod, 3586 jni_CallNonvirtualFloatMethodV, 3587 jni_CallNonvirtualFloatMethodA, 3588 jni_CallNonvirtualDoubleMethod, 3589 jni_CallNonvirtualDoubleMethodV, 3590 jni_CallNonvirtualDoubleMethodA, 3591 jni_CallNonvirtualVoidMethod, 3592 jni_CallNonvirtualVoidMethodV, 3593 jni_CallNonvirtualVoidMethodA, 3594 3595 jni_GetFieldID, 3596 3597 jni_GetObjectField, 3598 jni_GetBooleanField, 3599 jni_GetByteField, 3600 jni_GetCharField, 3601 jni_GetShortField, 3602 jni_GetIntField, 3603 jni_GetLongField, 3604 jni_GetFloatField, 3605 jni_GetDoubleField, 3606 3607 jni_SetObjectField, 3608 jni_SetBooleanField, 3609 jni_SetByteField, 3610 jni_SetCharField, 3611 jni_SetShortField, 3612 jni_SetIntField, 3613 jni_SetLongField, 3614 jni_SetFloatField, 3615 jni_SetDoubleField, 3616 3617 jni_GetStaticMethodID, 3618 3619 jni_CallStaticObjectMethod, 3620 jni_CallStaticObjectMethodV, 3621 jni_CallStaticObjectMethodA, 3622 jni_CallStaticBooleanMethod, 3623 jni_CallStaticBooleanMethodV, 3624 jni_CallStaticBooleanMethodA, 3625 jni_CallStaticByteMethod, 3626 jni_CallStaticByteMethodV, 3627 jni_CallStaticByteMethodA, 3628 jni_CallStaticCharMethod, 3629 jni_CallStaticCharMethodV, 3630 jni_CallStaticCharMethodA, 3631 jni_CallStaticShortMethod, 3632 jni_CallStaticShortMethodV, 3633 jni_CallStaticShortMethodA, 3634 jni_CallStaticIntMethod, 3635 jni_CallStaticIntMethodV, 3636 jni_CallStaticIntMethodA, 3637 jni_CallStaticLongMethod, 3638 jni_CallStaticLongMethodV, 3639 jni_CallStaticLongMethodA, 3640 jni_CallStaticFloatMethod, 3641 jni_CallStaticFloatMethodV, 3642 jni_CallStaticFloatMethodA, 3643 jni_CallStaticDoubleMethod, 3644 jni_CallStaticDoubleMethodV, 3645 jni_CallStaticDoubleMethodA, 3646 jni_CallStaticVoidMethod, 3647 jni_CallStaticVoidMethodV, 3648 jni_CallStaticVoidMethodA, 3649 3650 jni_GetStaticFieldID, 3651 3652 jni_GetStaticObjectField, 3653 jni_GetStaticBooleanField, 3654 jni_GetStaticByteField, 3655 jni_GetStaticCharField, 3656 jni_GetStaticShortField, 3657 jni_GetStaticIntField, 3658 jni_GetStaticLongField, 3659 jni_GetStaticFloatField, 3660 jni_GetStaticDoubleField, 3661 3662 jni_SetStaticObjectField, 3663 jni_SetStaticBooleanField, 3664 jni_SetStaticByteField, 3665 jni_SetStaticCharField, 3666 jni_SetStaticShortField, 3667 jni_SetStaticIntField, 3668 jni_SetStaticLongField, 3669 jni_SetStaticFloatField, 3670 jni_SetStaticDoubleField, 3671 3672 jni_NewString, 3673 jni_GetStringLength, 3674 jni_GetStringChars, 3675 jni_ReleaseStringChars, 3676 3677 jni_NewStringUTF, 3678 jni_GetStringUTFLength, 3679 jni_GetStringUTFChars, 3680 jni_ReleaseStringUTFChars, 3681 3682 jni_GetArrayLength, 3683 3684 jni_NewObjectArray, 3685 jni_GetObjectArrayElement, 3686 jni_SetObjectArrayElement, 3687 3688 jni_NewBooleanArray, 3689 jni_NewByteArray, 3690 jni_NewCharArray, 3691 jni_NewShortArray, 3692 jni_NewIntArray, 3693 jni_NewLongArray, 3694 jni_NewFloatArray, 3695 jni_NewDoubleArray, 3696 3697 jni_GetBooleanArrayElements, 3698 jni_GetByteArrayElements, 3699 jni_GetCharArrayElements, 3700 jni_GetShortArrayElements, 3701 jni_GetIntArrayElements, 3702 jni_GetLongArrayElements, 3703 jni_GetFloatArrayElements, 3704 jni_GetDoubleArrayElements, 3705 3706 jni_ReleaseBooleanArrayElements, 3707 jni_ReleaseByteArrayElements, 3708 jni_ReleaseCharArrayElements, 3709 jni_ReleaseShortArrayElements, 3710 jni_ReleaseIntArrayElements, 3711 jni_ReleaseLongArrayElements, 3712 jni_ReleaseFloatArrayElements, 3713 jni_ReleaseDoubleArrayElements, 3714 3715 jni_GetBooleanArrayRegion, 3716 jni_GetByteArrayRegion, 3717 jni_GetCharArrayRegion, 3718 jni_GetShortArrayRegion, 3719 jni_GetIntArrayRegion, 3720 jni_GetLongArrayRegion, 3721 jni_GetFloatArrayRegion, 3722 jni_GetDoubleArrayRegion, 3723 3724 jni_SetBooleanArrayRegion, 3725 jni_SetByteArrayRegion, 3726 jni_SetCharArrayRegion, 3727 jni_SetShortArrayRegion, 3728 jni_SetIntArrayRegion, 3729 jni_SetLongArrayRegion, 3730 jni_SetFloatArrayRegion, 3731 jni_SetDoubleArrayRegion, 3732 3733 jni_RegisterNatives, 3734 jni_UnregisterNatives, 3735 3736 jni_MonitorEnter, 3737 jni_MonitorExit, 3738 3739 jni_GetJavaVM, 3740 3741 jni_GetStringRegion, 3742 jni_GetStringUTFRegion, 3743 3744 jni_GetPrimitiveArrayCritical, 3745 jni_ReleasePrimitiveArrayCritical, 3746 3747 jni_GetStringCritical, 3748 jni_ReleaseStringCritical, 3749 3750 jni_NewWeakGlobalRef, 3751 jni_DeleteWeakGlobalRef, 3752 3753 jni_ExceptionCheck, 3754 3755 jni_NewDirectByteBuffer, 3756 jni_GetDirectBufferAddress, 3757 jni_GetDirectBufferCapacity, 3758 3759 // New 1_6 features 3760 3761 jni_GetObjectRefType, 3762 3763 // Module features 3764 3765 jni_GetModule 3766 }; 3767 3768 3769 // For jvmti use to modify jni function table. 3770 // Java threads in native contiues to run until it is transitioned 3771 // to VM at safepoint. Before the transition or before it is blocked 3772 // for safepoint it may access jni function table. VM could crash if 3773 // any java thread access the jni function table in the middle of memcpy. 3774 // To avoid this each function pointers are copied automically. 3775 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3776 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3777 intptr_t *a = (intptr_t *) jni_functions(); 3778 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3779 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3780 Atomic::store_ptr(*b++, a++); 3781 } 3782 } 3783 3784 void quicken_jni_functions() { 3785 // Replace Get<Primitive>Field with fast versions 3786 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3787 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3788 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3789 // windows x86 currently needs SEH wrapper and the gain of the fast 3790 // versions currently isn't certain for server vm on uniprocessor. 3791 && os::is_MP() 3792 #endif 3793 ) { 3794 address func; 3795 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3796 if (func != (address)-1) { 3797 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3798 } 3799 func = JNI_FastGetField::generate_fast_get_byte_field(); 3800 if (func != (address)-1) { 3801 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3802 } 3803 func = JNI_FastGetField::generate_fast_get_char_field(); 3804 if (func != (address)-1) { 3805 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3806 } 3807 func = JNI_FastGetField::generate_fast_get_short_field(); 3808 if (func != (address)-1) { 3809 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3810 } 3811 func = JNI_FastGetField::generate_fast_get_int_field(); 3812 if (func != (address)-1) { 3813 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3814 } 3815 func = JNI_FastGetField::generate_fast_get_long_field(); 3816 if (func != (address)-1) { 3817 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3818 } 3819 func = JNI_FastGetField::generate_fast_get_float_field(); 3820 if (func != (address)-1) { 3821 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3822 } 3823 func = JNI_FastGetField::generate_fast_get_double_field(); 3824 if (func != (address)-1) { 3825 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3826 } 3827 } 3828 } 3829 3830 // Returns the function structure 3831 struct JNINativeInterface_* jni_functions() { 3832 #if INCLUDE_JNI_CHECK 3833 if (CheckJNICalls) return jni_functions_check(); 3834 #endif // INCLUDE_JNI_CHECK 3835 return &jni_NativeInterface; 3836 } 3837 3838 // Returns the function structure 3839 struct JNINativeInterface_* jni_functions_nocheck() { 3840 return &jni_NativeInterface; 3841 } 3842 3843 3844 // Invocation API 3845 3846 3847 // Forward declaration 3848 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3849 3850 // Global invocation API vars 3851 volatile jint vm_created = 0; 3852 // Indicate whether it is safe to recreate VM 3853 volatile jint safe_to_recreate_vm = 1; 3854 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3855 3856 3857 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3858 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3859 3860 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3861 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3862 3863 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3864 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3865 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3866 jint ret = JNI_ERR; 3867 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3868 3869 if (Threads::is_supported_jni_version(args->version)) { 3870 ret = JNI_OK; 3871 } 3872 // 1.1 style no longer supported in hotspot. 3873 // According the JNI spec, we should update args->version on return. 3874 // We also use the structure to communicate with launcher about default 3875 // stack size. 3876 if (args->version == JNI_VERSION_1_1) { 3877 args->version = JNI_VERSION_1_2; 3878 // javaStackSize is int in arguments structure 3879 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3880 args->javaStackSize = (jint)(ThreadStackSize * K); 3881 } 3882 return ret; 3883 } 3884 3885 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3886 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3887 3888 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3889 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3890 3891 jint result = JNI_ERR; 3892 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3893 3894 // We're about to use Atomic::xchg for synchronization. Some Zero 3895 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3896 // but __sync_lock_test_and_set is not guaranteed to do what we want 3897 // on all architectures. So we check it works before relying on it. 3898 #if defined(ZERO) && defined(ASSERT) 3899 { 3900 jint a = 0xcafebabe; 3901 jint b = Atomic::xchg(0xdeadbeef, &a); 3902 void *c = &a; 3903 void *d = Atomic::xchg_ptr(&b, &c); 3904 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3905 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3906 } 3907 #endif // ZERO && ASSERT 3908 3909 // At the moment it's only possible to have one Java VM, 3910 // since some of the runtime state is in global variables. 3911 3912 // We cannot use our mutex locks here, since they only work on 3913 // Threads. We do an atomic compare and exchange to ensure only 3914 // one thread can call this method at a time 3915 3916 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3917 // the add/dec implementations are dependent on whether we are running 3918 // on a multiprocessor, and at this stage of initialization the os::is_MP 3919 // function used to determine this will always return false. Atomic::xchg 3920 // does not have this problem. 3921 if (Atomic::xchg(1, &vm_created) == 1) { 3922 return JNI_EEXIST; // already created, or create attempt in progress 3923 } 3924 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3925 return JNI_ERR; // someone tried and failed and retry not allowed. 3926 } 3927 3928 assert(vm_created == 1, "vm_created is true during the creation"); 3929 3930 /** 3931 * Certain errors during initialization are recoverable and do not 3932 * prevent this method from being called again at a later time 3933 * (perhaps with different arguments). However, at a certain 3934 * point during initialization if an error occurs we cannot allow 3935 * this function to be called again (or it will crash). In those 3936 * situations, the 'canTryAgain' flag is set to false, which atomically 3937 * sets safe_to_recreate_vm to 1, such that any new call to 3938 * JNI_CreateJavaVM will immediately fail using the above logic. 3939 */ 3940 bool can_try_again = true; 3941 3942 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3943 if (result == JNI_OK) { 3944 JavaThread *thread = JavaThread::current(); 3945 assert(!thread->has_pending_exception(), "should have returned not OK"); 3946 /* thread is thread_in_vm here */ 3947 *vm = (JavaVM *)(&main_vm); 3948 *(JNIEnv**)penv = thread->jni_environment(); 3949 3950 #if INCLUDE_JVMCI 3951 if (EnableJVMCI) { 3952 if (UseJVMCICompiler) { 3953 // JVMCI is initialized on a CompilerThread 3954 if (BootstrapJVMCI) { 3955 JavaThread* THREAD = thread; 3956 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3957 compiler->bootstrap(THREAD); 3958 if (HAS_PENDING_EXCEPTION) { 3959 HandleMark hm; 3960 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3961 } 3962 } 3963 } 3964 } 3965 #endif 3966 3967 // Tracks the time application was running before GC 3968 RuntimeService::record_application_start(); 3969 3970 // Notify JVMTI 3971 if (JvmtiExport::should_post_thread_life()) { 3972 JvmtiExport::post_thread_start(thread); 3973 } 3974 3975 EventThreadStart event; 3976 if (event.should_commit()) { 3977 event.set_thread(THREAD_TRACE_ID(thread)); 3978 event.commit(); 3979 } 3980 3981 #ifndef PRODUCT 3982 // Check if we should compile all classes on bootclasspath 3983 if (CompileTheWorld) ClassLoader::compile_the_world(); 3984 if (ReplayCompiles) ciReplay::replay(thread); 3985 3986 // Some platforms (like Win*) need a wrapper around these test 3987 // functions in order to properly handle error conditions. 3988 VMError::test_error_handler(); 3989 if (ExecuteInternalVMTests) { 3990 InternalVMTests::run(); 3991 } 3992 #endif 3993 3994 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3995 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3996 } else { 3997 // If create_vm exits because of a pending exception, exit with that 3998 // exception. In the future when we figure out how to reclaim memory, 3999 // we may be able to exit with JNI_ERR and allow the calling application 4000 // to continue. 4001 if (Universe::is_fully_initialized()) { 4002 // otherwise no pending exception possible - VM will already have aborted 4003 JavaThread* THREAD = JavaThread::current(); 4004 if (HAS_PENDING_EXCEPTION) { 4005 HandleMark hm; 4006 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4007 } 4008 } 4009 4010 if (can_try_again) { 4011 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4012 safe_to_recreate_vm = 1; 4013 } 4014 4015 // Creation failed. We must reset vm_created 4016 *vm = 0; 4017 *(JNIEnv**)penv = 0; 4018 // reset vm_created last to avoid race condition. Use OrderAccess to 4019 // control both compiler and architectural-based reordering. 4020 OrderAccess::release_store(&vm_created, 0); 4021 } 4022 4023 // Flush stdout and stderr before exit. 4024 fflush(stdout); 4025 fflush(stderr); 4026 4027 return result; 4028 4029 } 4030 4031 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4032 jint result = JNI_ERR; 4033 // On Windows, let CreateJavaVM run with SEH protection 4034 #ifdef _WIN32 4035 __try { 4036 #endif 4037 result = JNI_CreateJavaVM_inner(vm, penv, args); 4038 #ifdef _WIN32 4039 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4040 // Nothing to do. 4041 } 4042 #endif 4043 return result; 4044 } 4045 4046 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4047 // See bug 4367188, the wrapper can sometimes cause VM crashes 4048 // JNIWrapper("GetCreatedJavaVMs"); 4049 4050 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4051 4052 if (vm_created) { 4053 if (numVMs != NULL) *numVMs = 1; 4054 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4055 } else { 4056 if (numVMs != NULL) *numVMs = 0; 4057 } 4058 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4059 return JNI_OK; 4060 } 4061 4062 extern "C" { 4063 4064 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4065 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4066 4067 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4068 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4069 jint res = JNI_ERR; 4070 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4071 4072 if (!vm_created) { 4073 res = JNI_ERR; 4074 return res; 4075 } 4076 4077 JNIWrapper("DestroyJavaVM"); 4078 JNIEnv *env; 4079 JavaVMAttachArgs destroyargs; 4080 destroyargs.version = CurrentVersion; 4081 destroyargs.name = (char *)"DestroyJavaVM"; 4082 destroyargs.group = NULL; 4083 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4084 if (res != JNI_OK) { 4085 return res; 4086 } 4087 4088 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4089 JavaThread* thread = JavaThread::current(); 4090 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4091 if (Threads::destroy_vm()) { 4092 // Should not change thread state, VM is gone 4093 vm_created = false; 4094 res = JNI_OK; 4095 return res; 4096 } else { 4097 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4098 res = JNI_ERR; 4099 return res; 4100 } 4101 } 4102 4103 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4104 jint result = JNI_ERR; 4105 // On Windows, we need SEH protection 4106 #ifdef _WIN32 4107 __try { 4108 #endif 4109 result = jni_DestroyJavaVM_inner(vm); 4110 #ifdef _WIN32 4111 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4112 // Nothing to do. 4113 } 4114 #endif 4115 return result; 4116 } 4117 4118 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4119 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4120 4121 // Check below commented out from JDK1.2fcs as well 4122 /* 4123 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4124 return JNI_EVERSION; 4125 } 4126 */ 4127 4128 Thread* t = Thread::current_or_null(); 4129 if (t != NULL) { 4130 // If the thread has been attached this operation is a no-op 4131 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4132 return JNI_OK; 4133 } 4134 4135 // Create a thread and mark it as attaching so it will be skipped by the 4136 // ThreadsListEnumerator - see CR 6404306 4137 JavaThread* thread = new JavaThread(true); 4138 4139 // Set correct safepoint info. The thread is going to call into Java when 4140 // initializing the Java level thread object. Hence, the correct state must 4141 // be set in order for the Safepoint code to deal with it correctly. 4142 thread->set_thread_state(_thread_in_vm); 4143 thread->record_stack_base_and_size(); 4144 thread->initialize_thread_current(); 4145 4146 if (!os::create_attached_thread(thread)) { 4147 delete thread; 4148 return JNI_ERR; 4149 } 4150 // Enable stack overflow checks 4151 thread->create_stack_guard_pages(); 4152 4153 thread->initialize_tlab(); 4154 4155 thread->cache_global_variables(); 4156 4157 // Crucial that we do not have a safepoint check for this thread, since it has 4158 // not been added to the Thread list yet. 4159 { Threads_lock->lock_without_safepoint_check(); 4160 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4161 // avoid this thread trying to do a GC before it is added to the thread-list 4162 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4163 Threads::add(thread, daemon); 4164 Threads_lock->unlock(); 4165 } 4166 // Create thread group and name info from attach arguments 4167 oop group = NULL; 4168 char* thread_name = NULL; 4169 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4170 group = JNIHandles::resolve(args->group); 4171 thread_name = args->name; // may be NULL 4172 } 4173 if (group == NULL) group = Universe::main_thread_group(); 4174 4175 // Create Java level thread object and attach it to this thread 4176 bool attach_failed = false; 4177 { 4178 EXCEPTION_MARK; 4179 HandleMark hm(THREAD); 4180 Handle thread_group(THREAD, group); 4181 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4182 if (HAS_PENDING_EXCEPTION) { 4183 CLEAR_PENDING_EXCEPTION; 4184 // cleanup outside the handle mark. 4185 attach_failed = true; 4186 } 4187 } 4188 4189 if (attach_failed) { 4190 // Added missing cleanup 4191 thread->cleanup_failed_attach_current_thread(); 4192 return JNI_ERR; 4193 } 4194 4195 // mark the thread as no longer attaching 4196 // this uses a fence to push the change through so we don't have 4197 // to regrab the threads_lock 4198 thread->set_done_attaching_via_jni(); 4199 4200 // Set java thread status. 4201 java_lang_Thread::set_thread_status(thread->threadObj(), 4202 java_lang_Thread::RUNNABLE); 4203 4204 // Notify the debugger 4205 if (JvmtiExport::should_post_thread_life()) { 4206 JvmtiExport::post_thread_start(thread); 4207 } 4208 4209 EventThreadStart event; 4210 if (event.should_commit()) { 4211 event.set_thread(THREAD_TRACE_ID(thread)); 4212 event.commit(); 4213 } 4214 4215 *(JNIEnv**)penv = thread->jni_environment(); 4216 4217 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4218 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4219 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4220 // needed. 4221 4222 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4223 4224 // Perform any platform dependent FPU setup 4225 os::setup_fpu(); 4226 4227 return JNI_OK; 4228 } 4229 4230 4231 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4232 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4233 if (!vm_created) { 4234 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4235 return JNI_ERR; 4236 } 4237 4238 JNIWrapper("AttachCurrentThread"); 4239 jint ret = attach_current_thread(vm, penv, _args, false); 4240 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4241 return ret; 4242 } 4243 4244 4245 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4246 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4247 VM_Exit::block_if_vm_exited(); 4248 4249 JNIWrapper("DetachCurrentThread"); 4250 4251 // If the thread has already been detached the operation is a no-op 4252 if (Thread::current_or_null() == NULL) { 4253 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4254 return JNI_OK; 4255 } 4256 4257 JavaThread* thread = JavaThread::current(); 4258 if (thread->has_last_Java_frame()) { 4259 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4260 // Can't detach a thread that's running java, that can't work. 4261 return JNI_ERR; 4262 } 4263 4264 // Safepoint support. Have to do call-back to safepoint code, if in the 4265 // middel of a safepoint operation 4266 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4267 4268 // XXX: Note that JavaThread::exit() call below removes the guards on the 4269 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4270 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4271 // of the guards is visible in jni_AttachCurrentThread above, 4272 // the removal of the guards is buried below in JavaThread::exit() 4273 // here. The abstraction should be more symmetrically either exposed 4274 // or hidden (e.g. it could probably be hidden in the same 4275 // (platform-dependent) methods where we do alternate stack 4276 // maintenance work?) 4277 thread->exit(false, JavaThread::jni_detach); 4278 delete thread; 4279 4280 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4281 return JNI_OK; 4282 } 4283 4284 DT_RETURN_MARK_DECL(GetEnv, jint 4285 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4286 4287 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4288 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4289 jint ret = JNI_ERR; 4290 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4291 4292 if (!vm_created) { 4293 *penv = NULL; 4294 ret = JNI_EDETACHED; 4295 return ret; 4296 } 4297 4298 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4299 return ret; 4300 } 4301 4302 #ifndef JVMPI_VERSION_1 4303 // need these in order to be polite about older agents 4304 #define JVMPI_VERSION_1 ((jint)0x10000001) 4305 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4306 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4307 #endif // !JVMPI_VERSION_1 4308 4309 Thread* thread = Thread::current_or_null(); 4310 if (thread != NULL && thread->is_Java_thread()) { 4311 if (Threads::is_supported_jni_version_including_1_1(version)) { 4312 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4313 ret = JNI_OK; 4314 return ret; 4315 4316 } else if (version == JVMPI_VERSION_1 || 4317 version == JVMPI_VERSION_1_1 || 4318 version == JVMPI_VERSION_1_2) { 4319 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4320 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4321 ret = JNI_EVERSION; 4322 return ret; 4323 } else if (JvmtiExport::is_jvmdi_version(version)) { 4324 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4325 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4326 ret = JNI_EVERSION; 4327 return ret; 4328 } else { 4329 *penv = NULL; 4330 ret = JNI_EVERSION; 4331 return ret; 4332 } 4333 } else { 4334 *penv = NULL; 4335 ret = JNI_EDETACHED; 4336 return ret; 4337 } 4338 } 4339 4340 4341 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4342 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4343 if (!vm_created) { 4344 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4345 return JNI_ERR; 4346 } 4347 4348 JNIWrapper("AttachCurrentThreadAsDaemon"); 4349 jint ret = attach_current_thread(vm, penv, _args, true); 4350 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4351 return ret; 4352 } 4353 4354 4355 } // End extern "C" 4356 4357 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4358 NULL, 4359 NULL, 4360 NULL, 4361 4362 jni_DestroyJavaVM, 4363 jni_AttachCurrentThread, 4364 jni_DetachCurrentThread, 4365 jni_GetEnv, 4366 jni_AttachCurrentThreadAsDaemon 4367 };