1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "ci/ciReplay.hpp" 28 #include "classfile/altHashing.hpp" 29 #include "classfile/classFileStream.hpp" 30 #include "classfile/classLoader.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/modules.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionary.hpp" 36 #include "classfile/vmSymbols.hpp" 37 #include "gc/shared/gcLocker.inline.hpp" 38 #include "interpreter/linkResolver.hpp" 39 #include "memory/allocation.hpp" 40 #include "memory/allocation.inline.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.inline.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceOop.hpp" 46 #include "oops/markOop.hpp" 47 #include "oops/method.hpp" 48 #include "oops/objArrayKlass.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayKlass.hpp" 53 #include "oops/typeArrayOop.hpp" 54 #include "prims/jni.h" 55 #include "prims/jniCheck.hpp" 56 #include "prims/jniExport.hpp" 57 #include "prims/jniFastGetField.hpp" 58 #include "prims/jvm.h" 59 #include "prims/jvm_misc.hpp" 60 #include "prims/jvmtiExport.hpp" 61 #include "prims/jvmtiThreadState.hpp" 62 #include "runtime/atomic.hpp" 63 #include "runtime/compilationPolicy.hpp" 64 #include "runtime/fieldDescriptor.hpp" 65 #include "runtime/fprofiler.hpp" 66 #include "runtime/handles.inline.hpp" 67 #include "runtime/interfaceSupport.hpp" 68 #include "runtime/java.hpp" 69 #include "runtime/javaCalls.hpp" 70 #include "runtime/jfieldIDWorkaround.hpp" 71 #include "runtime/orderAccess.inline.hpp" 72 #include "runtime/reflection.hpp" 73 #include "runtime/sharedRuntime.hpp" 74 #include "runtime/signature.hpp" 75 #include "runtime/thread.inline.hpp" 76 #include "runtime/vm_operations.hpp" 77 #include "services/memTracker.hpp" 78 #include "services/runtimeService.hpp" 79 #include "trace/traceMacros.hpp" 80 #include "trace/tracing.hpp" 81 #include "utilities/defaultStream.hpp" 82 #include "utilities/dtrace.hpp" 83 #include "utilities/events.hpp" 84 #include "utilities/histogram.hpp" 85 #include "utilities/internalVMTests.hpp" 86 #include "utilities/macros.hpp" 87 #if INCLUDE_ALL_GCS 88 #include "gc/g1/g1SATBCardTableModRefBS.hpp" 89 #endif // INCLUDE_ALL_GCS 90 #if INCLUDE_JVMCI 91 #include "jvmci/jvmciCompiler.hpp" 92 #include "jvmci/jvmciRuntime.hpp" 93 #endif 94 95 static jint CurrentVersion = JNI_VERSION_9; 96 97 #ifdef _WIN32 98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 99 #endif 100 101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 102 // '-return' probe regardless of the return path is taken out of the function. 103 // Methods that have multiple return paths use this to avoid having to 104 // instrument each return path. Methods that use CHECK or THROW must use this 105 // since those macros can cause an immedate uninstrumented return. 106 // 107 // In order to get the return value, a reference to the variable containing 108 // the return value must be passed to the contructor of the object, and 109 // the return value must be set before return (since the mark object has 110 // a reference to it). 111 // 112 // Example: 113 // DT_RETURN_MARK_DECL(SomeFunc, int); 114 // JNI_ENTRY(int, SomeFunc, ...) 115 // int return_value = 0; 116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 117 // foo(CHECK_0) 118 // return_value = 5; 119 // return return_value; 120 // JNI_END 121 #define DT_RETURN_MARK_DECL(name, type, probe) \ 122 DTRACE_ONLY( \ 123 class DTraceReturnProbeMark_##name { \ 124 public: \ 125 const type& _ret_ref; \ 126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 127 ~DTraceReturnProbeMark_##name() { \ 128 probe; \ 129 } \ 130 } \ 131 ) 132 // Void functions are simpler since there's no return value 133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 134 DTRACE_ONLY( \ 135 class DTraceReturnProbeMark_##name { \ 136 public: \ 137 ~DTraceReturnProbeMark_##name() { \ 138 probe; \ 139 } \ 140 } \ 141 ) 142 143 // Place these macros in the function to mark the return. Non-void 144 // functions need the type and address of the return value. 145 #define DT_RETURN_MARK(name, type, ref) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 147 #define DT_VOID_RETURN_MARK(name) \ 148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 149 150 151 // Use these to select distinct code for floating-point vs. non-floating point 152 // situations. Used from within common macros where we need slightly 153 // different behavior for Float/Double 154 #define FP_SELECT_Boolean(intcode, fpcode) intcode 155 #define FP_SELECT_Byte(intcode, fpcode) intcode 156 #define FP_SELECT_Char(intcode, fpcode) intcode 157 #define FP_SELECT_Short(intcode, fpcode) intcode 158 #define FP_SELECT_Object(intcode, fpcode) intcode 159 #define FP_SELECT_Int(intcode, fpcode) intcode 160 #define FP_SELECT_Long(intcode, fpcode) intcode 161 #define FP_SELECT_Float(intcode, fpcode) fpcode 162 #define FP_SELECT_Double(intcode, fpcode) fpcode 163 #define FP_SELECT(TypeName, intcode, fpcode) \ 164 FP_SELECT_##TypeName(intcode, fpcode) 165 166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 167 // (dtrace doesn't do FP yet) 168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 172 FP_SELECT(TypeName, \ 173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 174 175 176 // out-of-line helpers for class jfieldIDWorkaround: 177 178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 180 uintptr_t as_uint = (uintptr_t) id; 181 intptr_t offset = raw_instance_offset(id); 182 if (is_checked_jfieldID(id)) { 183 if (!klass_hash_ok(k, id)) { 184 return false; 185 } 186 } 187 return InstanceKlass::cast(k)->contains_field_offset(offset); 188 } else { 189 JNIid* result = (JNIid*) id; 190 #ifdef ASSERT 191 return result != NULL && result->is_static_field_id(); 192 #else 193 return result != NULL; 194 #endif 195 } 196 } 197 198 199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 200 if (offset <= small_offset_mask) { 201 Klass* field_klass = k; 202 Klass* super_klass = field_klass->super(); 203 // With compressed oops the most super class with nonstatic fields would 204 // be the owner of fields embedded in the header. 205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 207 field_klass = super_klass; // super contains the field also 208 super_klass = field_klass->super(); 209 } 210 debug_only(NoSafepointVerifier nosafepoint;) 211 uintptr_t klass_hash = field_klass->identity_hash(); 212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 213 } else { 214 #if 0 215 #ifndef PRODUCT 216 { 217 ResourceMark rm; 218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 219 } 220 #endif 221 #endif 222 return 0; 223 } 224 } 225 226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 227 uintptr_t as_uint = (uintptr_t) id; 228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 229 do { 230 debug_only(NoSafepointVerifier nosafepoint;) 231 // Could use a non-blocking query for identity_hash here... 232 if ((k->identity_hash() & klass_mask) == klass_hash) 233 return true; 234 k = k->super(); 235 } while (k != NULL); 236 return false; 237 } 238 239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 241 uintptr_t as_uint = (uintptr_t) id; 242 intptr_t offset = raw_instance_offset(id); 243 if (VerifyJNIFields) { 244 if (is_checked_jfieldID(id)) { 245 guarantee(klass_hash_ok(k, id), 246 "Bug in native code: jfieldID class must match object"); 247 } else { 248 #if 0 249 #ifndef PRODUCT 250 if (Verbose) { 251 ResourceMark rm; 252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 253 } 254 #endif 255 #endif 256 } 257 } 258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 259 "Bug in native code: jfieldID offset must address interior of object"); 260 } 261 262 // Wrapper to trace JNI functions 263 264 #ifdef ASSERT 265 Histogram* JNIHistogram; 266 static volatile jint JNIHistogram_lock = 0; 267 268 class JNIHistogramElement : public HistogramElement { 269 public: 270 JNIHistogramElement(const char* name); 271 }; 272 273 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 274 _name = elementName; 275 uintx count = 0; 276 277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 279 count +=1; 280 if ( (WarnOnStalledSpinLock > 0) 281 && (count % WarnOnStalledSpinLock == 0)) { 282 warning("JNIHistogram_lock seems to be stalled"); 283 } 284 } 285 } 286 287 288 if(JNIHistogram == NULL) 289 JNIHistogram = new Histogram("JNI Call Counts",100); 290 291 JNIHistogram->add_element(this); 292 Atomic::dec(&JNIHistogram_lock); 293 } 294 295 #define JNICountWrapper(arg) \ 296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 298 if (e != NULL) e->increment_count() 299 #define JNIWrapper(arg) JNICountWrapper(arg); 300 #else 301 #define JNIWrapper(arg) 302 #endif 303 304 305 // Implementation of JNI entries 306 307 DT_RETURN_MARK_DECL(DefineClass, jclass 308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 309 310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 311 const jbyte *buf, jsize bufLen)) 312 JNIWrapper("DefineClass"); 313 314 HOTSPOT_JNI_DEFINECLASS_ENTRY( 315 env, (char*) name, loaderRef, (char*) buf, bufLen); 316 317 jclass cls = NULL; 318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 319 320 TempNewSymbol class_name = NULL; 321 // Since exceptions can be thrown, class initialization can take place 322 // if name is NULL no check for class name in .class stream has to be made. 323 if (name != NULL) { 324 const int str_len = (int)strlen(name); 325 if (str_len > Symbol::max_length()) { 326 // It's impossible to create this class; the name cannot fit 327 // into the constant pool. 328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 329 } 330 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 331 } 332 ResourceMark rm(THREAD); 333 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 334 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 335 336 if (UsePerfData && !class_loader.is_null()) { 337 Handle class_loader1 (THREAD, oopDesc::bs()->write_barrier(class_loader())); 338 // check whether the current caller thread holds the lock or not. 339 // If not, increment the corresponding counter 340 if (ObjectSynchronizer:: 341 query_lock_ownership((JavaThread*)THREAD, class_loader1) != 342 ObjectSynchronizer::owner_self) { 343 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 344 } 345 } 346 Klass* k = SystemDictionary::resolve_from_stream(class_name, 347 class_loader, 348 Handle(), 349 &st, 350 CHECK_NULL); 351 352 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 353 trace_class_resolution(k); 354 } 355 356 cls = (jclass)JNIHandles::make_local( 357 env, k->java_mirror()); 358 return cls; 359 JNI_END 360 361 362 363 static bool first_time_FindClass = true; 364 365 DT_RETURN_MARK_DECL(FindClass, jclass 366 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 367 368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 369 JNIWrapper("FindClass"); 370 371 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 372 373 jclass result = NULL; 374 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 375 376 // Remember if we are the first invocation of jni_FindClass 377 bool first_time = first_time_FindClass; 378 first_time_FindClass = false; 379 380 // Sanity check the name: it cannot be null or larger than the maximum size 381 // name we can fit in the constant pool. 382 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 383 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 384 } 385 386 //%note jni_3 387 Handle loader; 388 Handle protection_domain; 389 // Find calling class 390 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 391 if (k.not_null()) { 392 loader = Handle(THREAD, k->class_loader()); 393 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 394 // in the correct class context. 395 if (loader.is_null() && 396 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 397 JavaValue result(T_OBJECT); 398 JavaCalls::call_static(&result, k, 399 vmSymbols::getFromClass_name(), 400 vmSymbols::void_class_signature(), 401 thread); 402 if (HAS_PENDING_EXCEPTION) { 403 Handle ex(thread, thread->pending_exception()); 404 CLEAR_PENDING_EXCEPTION; 405 THROW_HANDLE_0(ex); 406 } 407 oop mirror = (oop) result.get_jobject(); 408 loader = Handle(THREAD, 409 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 410 protection_domain = Handle(THREAD, 411 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 412 } 413 } else { 414 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 415 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 416 } 417 418 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 419 result = find_class_from_class_loader(env, sym, true, loader, 420 protection_domain, true, thread); 421 422 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 423 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 424 } 425 426 // If we were the first invocation of jni_FindClass, we enable compilation again 427 // rather than just allowing invocation counter to overflow and decay. 428 // Controlled by flag DelayCompilationDuringStartup. 429 if (first_time && !CompileTheWorld) 430 CompilationPolicy::completed_vm_startup(); 431 432 return result; 433 JNI_END 434 435 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 436 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 437 438 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 439 JNIWrapper("FromReflectedMethod"); 440 441 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 442 443 jmethodID ret = NULL; 444 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 445 446 // method is a handle to a java.lang.reflect.Method object 447 oop reflected = JNIHandles::resolve_non_null(method); 448 oop mirror = NULL; 449 int slot = 0; 450 451 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 452 mirror = java_lang_reflect_Constructor::clazz(reflected); 453 slot = java_lang_reflect_Constructor::slot(reflected); 454 } else { 455 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 456 mirror = java_lang_reflect_Method::clazz(reflected); 457 slot = java_lang_reflect_Method::slot(reflected); 458 } 459 Klass* k = java_lang_Class::as_Klass(mirror); 460 461 KlassHandle k1(THREAD, k); 462 // Make sure class is initialized before handing id's out to methods 463 k1()->initialize(CHECK_NULL); 464 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 465 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 466 return ret; 467 JNI_END 468 469 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 470 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 471 472 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 473 JNIWrapper("FromReflectedField"); 474 475 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 476 477 jfieldID ret = NULL; 478 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 479 480 // field is a handle to a java.lang.reflect.Field object 481 oop reflected = JNIHandles::resolve_non_null(field); 482 oop mirror = java_lang_reflect_Field::clazz(reflected); 483 Klass* k = java_lang_Class::as_Klass(mirror); 484 int slot = java_lang_reflect_Field::slot(reflected); 485 int modifiers = java_lang_reflect_Field::modifiers(reflected); 486 487 KlassHandle k1(THREAD, k); 488 // Make sure class is initialized before handing id's out to fields 489 k1()->initialize(CHECK_NULL); 490 491 // First check if this is a static field 492 if (modifiers & JVM_ACC_STATIC) { 493 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 494 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 495 assert(id != NULL, "corrupt Field object"); 496 debug_only(id->set_is_static_field_id();) 497 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 498 ret = jfieldIDWorkaround::to_static_jfieldID(id); 499 return ret; 500 } 501 502 // The slot is the index of the field description in the field-array 503 // The jfieldID is the offset of the field within the object 504 // It may also have hash bits for k, if VerifyJNIFields is turned on. 505 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 506 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 507 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 508 return ret; 509 JNI_END 510 511 512 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 513 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 514 515 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 516 JNIWrapper("ToReflectedMethod"); 517 518 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 519 520 jobject ret = NULL; 521 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 522 523 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 524 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 525 oop reflection_method; 526 if (m->is_initializer()) { 527 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 528 } else { 529 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 530 } 531 ret = JNIHandles::make_local(env, reflection_method); 532 return ret; 533 JNI_END 534 535 DT_RETURN_MARK_DECL(GetSuperclass, jclass 536 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 537 538 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 539 JNIWrapper("GetSuperclass"); 540 541 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 542 543 jclass obj = NULL; 544 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 545 546 oop mirror = JNIHandles::resolve_non_null(sub); 547 // primitive classes return NULL 548 if (java_lang_Class::is_primitive(mirror)) return NULL; 549 550 // Rules of Class.getSuperClass as implemented by KLass::java_super: 551 // arrays return Object 552 // interfaces return NULL 553 // proper classes return Klass::super() 554 Klass* k = java_lang_Class::as_Klass(mirror); 555 if (k->is_interface()) return NULL; 556 557 // return mirror for superclass 558 Klass* super = k->java_super(); 559 // super2 is the value computed by the compiler's getSuperClass intrinsic: 560 debug_only(Klass* super2 = ( k->is_array_klass() 561 ? SystemDictionary::Object_klass() 562 : k->super() ) ); 563 assert(super == super2, 564 "java_super computation depends on interface, array, other super"); 565 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 566 return obj; 567 JNI_END 568 569 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 570 JNIWrapper("IsSubclassOf"); 571 572 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 573 574 oop sub_mirror = JNIHandles::resolve_non_null(sub); 575 oop super_mirror = JNIHandles::resolve_non_null(super); 576 if (java_lang_Class::is_primitive(sub_mirror) || 577 java_lang_Class::is_primitive(super_mirror)) { 578 jboolean ret = oopDesc::equals(sub_mirror, super_mirror); 579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 580 return ret; 581 } 582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 585 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 586 JNI_TRUE : JNI_FALSE; 587 588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 589 return ret; 590 JNI_END 591 592 593 DT_RETURN_MARK_DECL(Throw, jint 594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 595 596 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 597 JNIWrapper("Throw"); 598 599 HOTSPOT_JNI_THROW_ENTRY(env, obj); 600 601 jint ret = JNI_OK; 602 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 603 604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 605 ShouldNotReachHere(); 606 return 0; // Mute compiler. 607 JNI_END 608 609 610 DT_RETURN_MARK_DECL(ThrowNew, jint 611 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 612 613 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 614 JNIWrapper("ThrowNew"); 615 616 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 617 618 jint ret = JNI_OK; 619 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 620 621 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 622 Symbol* name = k->name(); 623 Handle class_loader (THREAD, k->class_loader()); 624 Handle protection_domain (THREAD, k->protection_domain()); 625 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 626 ShouldNotReachHere(); 627 return 0; // Mute compiler. 628 JNI_END 629 630 631 // JNI functions only transform a pending async exception to a synchronous 632 // exception in ExceptionOccurred and ExceptionCheck calls, since 633 // delivering an async exception in other places won't change the native 634 // code's control flow and would be harmful when native code further calls 635 // JNI functions with a pending exception. Async exception is also checked 636 // during the call, so ExceptionOccurred/ExceptionCheck won't return 637 // false but deliver the async exception at the very end during 638 // state transition. 639 640 static void jni_check_async_exceptions(JavaThread *thread) { 641 assert(thread == Thread::current(), "must be itself"); 642 thread->check_and_handle_async_exceptions(); 643 } 644 645 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 646 JNIWrapper("ExceptionOccurred"); 647 648 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 649 650 jni_check_async_exceptions(thread); 651 oop exception = thread->pending_exception(); 652 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 653 654 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 655 return ret; 656 JNI_END 657 658 659 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 660 JNIWrapper("ExceptionDescribe"); 661 662 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 663 664 if (thread->has_pending_exception()) { 665 Handle ex(thread, thread->pending_exception()); 666 thread->clear_pending_exception(); 667 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 668 // Don't print anything if we are being killed. 669 } else { 670 jio_fprintf(defaultStream::error_stream(), "Exception "); 671 if (thread != NULL && thread->threadObj() != NULL) { 672 ResourceMark rm(THREAD); 673 jio_fprintf(defaultStream::error_stream(), 674 "in thread \"%s\" ", thread->get_thread_name()); 675 } 676 if (ex->is_a(SystemDictionary::Throwable_klass())) { 677 JavaValue result(T_VOID); 678 JavaCalls::call_virtual(&result, 679 ex, 680 KlassHandle(THREAD, 681 SystemDictionary::Throwable_klass()), 682 vmSymbols::printStackTrace_name(), 683 vmSymbols::void_method_signature(), 684 THREAD); 685 // If an exception is thrown in the call it gets thrown away. Not much 686 // we can do with it. The native code that calls this, does not check 687 // for the exception - hence, it might still be in the thread when DestroyVM gets 688 // called, potentially causing a few asserts to trigger - since no pending exception 689 // is expected. 690 CLEAR_PENDING_EXCEPTION; 691 } else { 692 ResourceMark rm(THREAD); 693 jio_fprintf(defaultStream::error_stream(), 694 ". Uncaught exception of type %s.", 695 ex->klass()->external_name()); 696 } 697 } 698 } 699 700 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 701 JNI_END 702 703 704 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 705 JNIWrapper("ExceptionClear"); 706 707 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 708 709 // The jni code might be using this API to clear java thrown exception. 710 // So just mark jvmti thread exception state as exception caught. 711 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 712 if (state != NULL && state->is_exception_detected()) { 713 state->set_exception_caught(); 714 } 715 thread->clear_pending_exception(); 716 717 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 718 JNI_END 719 720 721 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 722 JNIWrapper("FatalError"); 723 724 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 725 726 tty->print_cr("FATAL ERROR in native method: %s", msg); 727 thread->print_stack(); 728 os::abort(); // Dump core and abort 729 JNI_END 730 731 732 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 733 JNIWrapper("PushLocalFrame"); 734 735 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 736 737 //%note jni_11 738 if (capacity < 0 || 739 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 740 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 741 return JNI_ERR; 742 } 743 JNIHandleBlock* old_handles = thread->active_handles(); 744 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 745 assert(new_handles != NULL, "should not be NULL"); 746 new_handles->set_pop_frame_link(old_handles); 747 thread->set_active_handles(new_handles); 748 jint ret = JNI_OK; 749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 750 return ret; 751 JNI_END 752 753 754 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 755 JNIWrapper("PopLocalFrame"); 756 757 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 758 759 //%note jni_11 760 Handle result_handle(thread, JNIHandles::resolve(result)); 761 JNIHandleBlock* old_handles = thread->active_handles(); 762 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 763 if (new_handles != NULL) { 764 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 765 // This way code will still work if PopLocalFrame is called without a corresponding 766 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 767 // the release_block call will release the blocks. 768 thread->set_active_handles(new_handles); 769 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 770 JNIHandleBlock::release_block(old_handles, thread); // may block 771 result = JNIHandles::make_local(thread, result_handle()); 772 } 773 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 774 return result; 775 JNI_END 776 777 778 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 779 JNIWrapper("NewGlobalRef"); 780 781 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 782 783 Handle ref_handle(thread, JNIHandles::resolve(ref)); 784 jobject ret = JNIHandles::make_global(ref_handle); 785 786 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 787 return ret; 788 JNI_END 789 790 // Must be JNI_ENTRY (with HandleMark) 791 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 792 JNIWrapper("DeleteGlobalRef"); 793 794 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 795 796 JNIHandles::destroy_global(ref); 797 798 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 799 JNI_END 800 801 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 802 JNIWrapper("DeleteLocalRef"); 803 804 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 805 806 JNIHandles::destroy_local(obj); 807 808 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 809 JNI_END 810 811 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 812 JNIWrapper("IsSameObject"); 813 814 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 815 816 oop a = JNIHandles::resolve(r1); 817 oop b = JNIHandles::resolve(r2); 818 jboolean ret = oopDesc::equals(a, b) ? JNI_TRUE : JNI_FALSE; 819 820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 821 return ret; 822 JNI_END 823 824 825 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 826 JNIWrapper("NewLocalRef"); 827 828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 829 830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 831 832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 833 return ret; 834 JNI_END 835 836 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 837 JNIWrapper("EnsureLocalCapacity"); 838 839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 840 841 jint ret; 842 if (capacity >= 0 && 843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 844 ret = JNI_OK; 845 } else { 846 ret = JNI_ERR; 847 } 848 849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 850 return ret; 851 JNI_END 852 853 // Return the Handle Type 854 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 855 JNIWrapper("GetObjectRefType"); 856 857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 858 859 jobjectRefType ret; 860 if (JNIHandles::is_local_handle(thread, obj) || 861 JNIHandles::is_frame_handle(thread, obj)) 862 ret = JNILocalRefType; 863 else if (JNIHandles::is_global_handle(obj)) 864 ret = JNIGlobalRefType; 865 else if (JNIHandles::is_weak_global_handle(obj)) 866 ret = JNIWeakGlobalRefType; 867 else 868 ret = JNIInvalidRefType; 869 870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 871 return ret; 872 JNI_END 873 874 875 class JNI_ArgumentPusher : public SignatureIterator { 876 protected: 877 JavaCallArguments* _arguments; 878 879 virtual void get_bool () = 0; 880 virtual void get_char () = 0; 881 virtual void get_short () = 0; 882 virtual void get_byte () = 0; 883 virtual void get_int () = 0; 884 virtual void get_long () = 0; 885 virtual void get_float () = 0; 886 virtual void get_double () = 0; 887 virtual void get_object () = 0; 888 889 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 890 this->_return_type = T_ILLEGAL; 891 _arguments = NULL; 892 } 893 894 public: 895 virtual void iterate( uint64_t fingerprint ) = 0; 896 897 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 898 899 inline void do_bool() { if (!is_return_type()) get_bool(); } 900 inline void do_char() { if (!is_return_type()) get_char(); } 901 inline void do_short() { if (!is_return_type()) get_short(); } 902 inline void do_byte() { if (!is_return_type()) get_byte(); } 903 inline void do_int() { if (!is_return_type()) get_int(); } 904 inline void do_long() { if (!is_return_type()) get_long(); } 905 inline void do_float() { if (!is_return_type()) get_float(); } 906 inline void do_double() { if (!is_return_type()) get_double(); } 907 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 909 inline void do_void() { } 910 911 JavaCallArguments* arguments() { return _arguments; } 912 void push_receiver(Handle h) { _arguments->push_oop(h); } 913 }; 914 915 916 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 917 protected: 918 va_list _ap; 919 920 inline void get_bool() { 921 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 922 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 923 // TemplateInterpreterGenerator::generate_result_handler_for and 924 // SharedRuntime::generate_native_wrapper. 925 jboolean b = va_arg(_ap, jint); 926 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 927 } 928 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 929 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 930 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 931 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 932 933 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 934 935 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 936 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 937 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 938 inline void get_object() { jobject l = va_arg(_ap, jobject); 939 _arguments->push_oop(Handle((oop *)l, false)); } 940 941 inline void set_ap(va_list rap) { 942 va_copy(_ap, rap); 943 } 944 945 public: 946 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 947 : JNI_ArgumentPusher(signature) { 948 set_ap(rap); 949 } 950 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 951 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 952 set_ap(rap); 953 } 954 955 // Optimized path if we have the bitvector form of signature 956 void iterate( uint64_t fingerprint ) { 957 if (fingerprint == (uint64_t)CONST64(-1)) { 958 SignatureIterator::iterate(); // Must be too many arguments 959 } else { 960 _return_type = (BasicType)((fingerprint >> static_feature_size) & 961 result_feature_mask); 962 963 assert(fingerprint, "Fingerprint should not be 0"); 964 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 965 while ( 1 ) { 966 switch ( fingerprint & parameter_feature_mask ) { 967 case bool_parm: 968 get_bool(); 969 break; 970 case char_parm: 971 get_char(); 972 break; 973 case short_parm: 974 get_short(); 975 break; 976 case byte_parm: 977 get_byte(); 978 break; 979 case int_parm: 980 get_int(); 981 break; 982 case obj_parm: 983 get_object(); 984 break; 985 case long_parm: 986 get_long(); 987 break; 988 case float_parm: 989 get_float(); 990 break; 991 case double_parm: 992 get_double(); 993 break; 994 case done_parm: 995 return; 996 break; 997 default: 998 ShouldNotReachHere(); 999 break; 1000 } 1001 fingerprint >>= parameter_feature_size; 1002 } 1003 } 1004 } 1005 }; 1006 1007 1008 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1009 protected: 1010 const jvalue *_ap; 1011 1012 inline void get_bool() { 1013 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1014 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1015 // TemplateInterpreterGenerator::generate_result_handler_for and 1016 // SharedRuntime::generate_native_wrapper. 1017 jboolean b = (_ap++)->z; 1018 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1019 } 1020 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1021 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1022 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1023 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1024 1025 inline void get_long() { _arguments->push_long((_ap++)->j); } 1026 inline void get_float() { _arguments->push_float((_ap++)->f); } 1027 inline void get_double() { _arguments->push_double((_ap++)->d);} 1028 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1029 1030 inline void set_ap(const jvalue *rap) { _ap = rap; } 1031 1032 public: 1033 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1034 : JNI_ArgumentPusher(signature) { 1035 set_ap(rap); 1036 } 1037 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1038 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1039 set_ap(rap); 1040 } 1041 1042 // Optimized path if we have the bitvector form of signature 1043 void iterate( uint64_t fingerprint ) { 1044 if (fingerprint == (uint64_t)CONST64(-1)) { 1045 SignatureIterator::iterate(); // Must be too many arguments 1046 } else { 1047 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1048 result_feature_mask); 1049 assert(fingerprint, "Fingerprint should not be 0"); 1050 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1051 while ( 1 ) { 1052 switch ( fingerprint & parameter_feature_mask ) { 1053 case bool_parm: 1054 get_bool(); 1055 break; 1056 case char_parm: 1057 get_char(); 1058 break; 1059 case short_parm: 1060 get_short(); 1061 break; 1062 case byte_parm: 1063 get_byte(); 1064 break; 1065 case int_parm: 1066 get_int(); 1067 break; 1068 case obj_parm: 1069 get_object(); 1070 break; 1071 case long_parm: 1072 get_long(); 1073 break; 1074 case float_parm: 1075 get_float(); 1076 break; 1077 case double_parm: 1078 get_double(); 1079 break; 1080 case done_parm: 1081 return; 1082 break; 1083 default: 1084 ShouldNotReachHere(); 1085 break; 1086 } 1087 fingerprint >>= parameter_feature_size; 1088 } 1089 } 1090 } 1091 }; 1092 1093 1094 enum JNICallType { 1095 JNI_STATIC, 1096 JNI_VIRTUAL, 1097 JNI_NONVIRTUAL 1098 }; 1099 1100 1101 1102 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1103 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1104 1105 // Create object to hold arguments for the JavaCall, and associate it with 1106 // the jni parser 1107 ResourceMark rm(THREAD); 1108 int number_of_parameters = method->size_of_parameters(); 1109 JavaCallArguments java_args(number_of_parameters); 1110 args->set_java_argument_object(&java_args); 1111 1112 assert(method->is_static(), "method should be static"); 1113 1114 // Fill out JavaCallArguments object 1115 args->iterate( Fingerprinter(method).fingerprint() ); 1116 // Initialize result type 1117 result->set_type(args->get_ret_type()); 1118 1119 // Invoke the method. Result is returned as oop. 1120 JavaCalls::call(result, method, &java_args, CHECK); 1121 1122 // Convert result 1123 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1124 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1125 } 1126 } 1127 1128 1129 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1130 oop recv = JNIHandles::resolve(receiver); 1131 if (recv == NULL) { 1132 THROW(vmSymbols::java_lang_NullPointerException()); 1133 } 1134 Handle h_recv(THREAD, recv); 1135 1136 int number_of_parameters; 1137 Method* selected_method; 1138 { 1139 Method* m = Method::resolve_jmethod_id(method_id); 1140 number_of_parameters = m->size_of_parameters(); 1141 Klass* holder = m->method_holder(); 1142 if (call_type != JNI_VIRTUAL) { 1143 selected_method = m; 1144 } else if (!m->has_itable_index()) { 1145 // non-interface call -- for that little speed boost, don't handlize 1146 debug_only(NoSafepointVerifier nosafepoint;) 1147 // jni_GetMethodID makes sure class is linked and initialized 1148 // so m should have a valid vtable index. 1149 assert(m->valid_vtable_index(), "no valid vtable index"); 1150 int vtbl_index = m->vtable_index(); 1151 if (vtbl_index != Method::nonvirtual_vtable_index) { 1152 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1153 } else { 1154 // final method 1155 selected_method = m; 1156 } 1157 } else { 1158 // interface call 1159 KlassHandle h_holder(THREAD, holder); 1160 1161 int itbl_index = m->itable_index(); 1162 Klass* k = h_recv->klass(); 1163 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1164 } 1165 } 1166 1167 methodHandle method(THREAD, selected_method); 1168 1169 // Create object to hold arguments for the JavaCall, and associate it with 1170 // the jni parser 1171 ResourceMark rm(THREAD); 1172 JavaCallArguments java_args(number_of_parameters); 1173 args->set_java_argument_object(&java_args); 1174 1175 // handle arguments 1176 assert(!method->is_static(), "method should not be static"); 1177 args->push_receiver(h_recv); // Push jobject handle 1178 1179 // Fill out JavaCallArguments object 1180 args->iterate( Fingerprinter(method).fingerprint() ); 1181 // Initialize result type 1182 result->set_type(args->get_ret_type()); 1183 1184 // Invoke the method. Result is returned as oop. 1185 JavaCalls::call(result, method, &java_args, CHECK); 1186 1187 // Convert result 1188 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1190 } 1191 } 1192 1193 1194 static instanceOop alloc_object(jclass clazz, TRAPS) { 1195 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1196 if (k == NULL) { 1197 ResourceMark rm(THREAD); 1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1199 } 1200 k()->check_valid_for_instantiation(false, CHECK_NULL); 1201 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1202 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1203 return ih; 1204 } 1205 1206 DT_RETURN_MARK_DECL(AllocObject, jobject 1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1208 1209 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1210 JNIWrapper("AllocObject"); 1211 1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1213 1214 jobject ret = NULL; 1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1216 1217 instanceOop i = alloc_object(clazz, CHECK_NULL); 1218 ret = JNIHandles::make_local(env, i); 1219 return ret; 1220 JNI_END 1221 1222 DT_RETURN_MARK_DECL(NewObjectA, jobject 1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1224 1225 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1226 JNIWrapper("NewObjectA"); 1227 1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1229 1230 jobject obj = NULL; 1231 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1232 1233 instanceOop i = alloc_object(clazz, CHECK_NULL); 1234 obj = JNIHandles::make_local(env, i); 1235 JavaValue jvalue(T_VOID); 1236 JNI_ArgumentPusherArray ap(methodID, args); 1237 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1238 return obj; 1239 JNI_END 1240 1241 1242 DT_RETURN_MARK_DECL(NewObjectV, jobject 1243 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1244 1245 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1246 JNIWrapper("NewObjectV"); 1247 1248 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1249 1250 jobject obj = NULL; 1251 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1252 1253 instanceOop i = alloc_object(clazz, CHECK_NULL); 1254 obj = JNIHandles::make_local(env, i); 1255 JavaValue jvalue(T_VOID); 1256 JNI_ArgumentPusherVaArg ap(methodID, args); 1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1258 return obj; 1259 JNI_END 1260 1261 1262 DT_RETURN_MARK_DECL(NewObject, jobject 1263 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1264 1265 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1266 JNIWrapper("NewObject"); 1267 1268 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1269 1270 jobject obj = NULL; 1271 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1272 1273 instanceOop i = alloc_object(clazz, CHECK_NULL); 1274 obj = JNIHandles::make_local(env, i); 1275 va_list args; 1276 va_start(args, methodID); 1277 JavaValue jvalue(T_VOID); 1278 JNI_ArgumentPusherVaArg ap(methodID, args); 1279 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1280 va_end(args); 1281 return obj; 1282 JNI_END 1283 1284 1285 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1286 JNIWrapper("GetObjectClass"); 1287 1288 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1289 1290 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1291 jclass ret = 1292 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1293 1294 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1295 return ret; 1296 JNI_END 1297 1298 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1299 JNIWrapper("IsInstanceOf"); 1300 1301 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1302 1303 jboolean ret = JNI_TRUE; 1304 if (obj != NULL) { 1305 ret = JNI_FALSE; 1306 Klass* k = java_lang_Class::as_Klass( 1307 JNIHandles::resolve_non_null(clazz)); 1308 if (k != NULL) { 1309 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1310 } 1311 } 1312 1313 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1314 return ret; 1315 JNI_END 1316 1317 1318 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1319 const char *sig, bool is_static, TRAPS) { 1320 // %%%% This code should probably just call into a method in the LinkResolver 1321 // 1322 // The class should have been loaded (we have an instance of the class 1323 // passed in) so the method and signature should already be in the symbol 1324 // table. If they're not there, the method doesn't exist. 1325 const char *name_to_probe = (name_str == NULL) 1326 ? vmSymbols::object_initializer_name()->as_C_string() 1327 : name_str; 1328 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1329 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1330 1331 if (name == NULL || signature == NULL) { 1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1333 } 1334 1335 // Throw a NoSuchMethodError exception if we have an instance of a 1336 // primitive java.lang.Class 1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1338 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1339 } 1340 1341 KlassHandle klass(THREAD, 1342 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1343 1344 // Make sure class is linked and initialized before handing id's out to 1345 // Method*s. 1346 klass()->initialize(CHECK_NULL); 1347 1348 Method* m; 1349 if (name == vmSymbols::object_initializer_name() || 1350 name == vmSymbols::class_initializer_name()) { 1351 // Never search superclasses for constructors 1352 if (klass->is_instance_klass()) { 1353 m = InstanceKlass::cast(klass())->find_method(name, signature); 1354 } else { 1355 m = NULL; 1356 } 1357 } else { 1358 m = klass->lookup_method(name, signature); 1359 if (m == NULL && klass->is_instance_klass()) { 1360 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1361 } 1362 } 1363 if (m == NULL || (m->is_static() != is_static)) { 1364 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1365 } 1366 return m->jmethod_id(); 1367 } 1368 1369 1370 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1371 const char *name, const char *sig)) 1372 JNIWrapper("GetMethodID"); 1373 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1374 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1375 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1376 return ret; 1377 JNI_END 1378 1379 1380 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1381 const char *name, const char *sig)) 1382 JNIWrapper("GetStaticMethodID"); 1383 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1384 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1385 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1386 return ret; 1387 JNI_END 1388 1389 1390 1391 // 1392 // Calling Methods 1393 // 1394 1395 1396 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1397 , EntryProbe, ReturnProbe) \ 1398 \ 1399 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1400 , ReturnProbe); \ 1401 \ 1402 JNI_ENTRY(ResultType, \ 1403 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1404 JNIWrapper("Call" XSTR(Result) "Method"); \ 1405 \ 1406 EntryProbe; \ 1407 ResultType ret = 0;\ 1408 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1409 (const ResultType&)ret);\ 1410 \ 1411 va_list args; \ 1412 va_start(args, methodID); \ 1413 JavaValue jvalue(Tag); \ 1414 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1416 va_end(args); \ 1417 ret = jvalue.get_##ResultType(); \ 1418 return ret;\ 1419 JNI_END 1420 1421 // the runtime type of subword integral basic types is integer 1422 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1423 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1425 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1426 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1428 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1429 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1431 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1432 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1434 1435 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1436 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1438 DEFINE_CALLMETHOD(jint, Int, T_INT, 1439 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1441 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1442 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1443 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1444 // Float and double probes don't return value because dtrace doesn't currently support it 1445 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1446 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1447 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1448 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1449 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1450 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1451 1452 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1453 , EntryProbe, ReturnProbe) \ 1454 \ 1455 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1456 , ReturnProbe); \ 1457 \ 1458 JNI_ENTRY(ResultType, \ 1459 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1460 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1461 \ 1462 EntryProbe;\ 1463 ResultType ret = 0;\ 1464 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1465 (const ResultType&)ret);\ 1466 \ 1467 JavaValue jvalue(Tag); \ 1468 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1470 ret = jvalue.get_##ResultType(); \ 1471 return ret;\ 1472 JNI_END 1473 1474 // the runtime type of subword integral basic types is integer 1475 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1476 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1478 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1479 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1481 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1482 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1484 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1485 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1487 1488 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1489 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1491 DEFINE_CALLMETHODV(jint, Int, T_INT, 1492 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1494 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1495 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1496 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1497 // Float and double probes don't return value because dtrace doesn't currently support it 1498 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1499 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1500 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1501 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1502 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1503 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1504 1505 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1506 , EntryProbe, ReturnProbe) \ 1507 \ 1508 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1509 , ReturnProbe); \ 1510 \ 1511 JNI_ENTRY(ResultType, \ 1512 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1513 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1514 EntryProbe; \ 1515 ResultType ret = 0;\ 1516 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1517 (const ResultType&)ret);\ 1518 \ 1519 JavaValue jvalue(Tag); \ 1520 JNI_ArgumentPusherArray ap(methodID, args); \ 1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1522 ret = jvalue.get_##ResultType(); \ 1523 return ret;\ 1524 JNI_END 1525 1526 // the runtime type of subword integral basic types is integer 1527 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1528 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1530 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1531 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1533 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1534 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1536 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1537 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1539 1540 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1541 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1543 DEFINE_CALLMETHODA(jint, Int, T_INT, 1544 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1546 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1547 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1548 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1549 // Float and double probes don't return value because dtrace doesn't currently support it 1550 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1551 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1552 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1553 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1554 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1555 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1556 1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1560 1561 1562 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1563 JNIWrapper("CallVoidMethod"); 1564 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1565 DT_VOID_RETURN_MARK(CallVoidMethod); 1566 1567 va_list args; 1568 va_start(args, methodID); 1569 JavaValue jvalue(T_VOID); 1570 JNI_ArgumentPusherVaArg ap(methodID, args); 1571 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1572 va_end(args); 1573 JNI_END 1574 1575 1576 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1577 JNIWrapper("CallVoidMethodV"); 1578 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1579 DT_VOID_RETURN_MARK(CallVoidMethodV); 1580 1581 JavaValue jvalue(T_VOID); 1582 JNI_ArgumentPusherVaArg ap(methodID, args); 1583 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1584 JNI_END 1585 1586 1587 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1588 JNIWrapper("CallVoidMethodA"); 1589 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1590 DT_VOID_RETURN_MARK(CallVoidMethodA); 1591 1592 JavaValue jvalue(T_VOID); 1593 JNI_ArgumentPusherArray ap(methodID, args); 1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1595 JNI_END 1596 1597 1598 1599 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1600 , EntryProbe, ReturnProbe) \ 1601 \ 1602 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1603 , ReturnProbe);\ 1604 \ 1605 JNI_ENTRY(ResultType, \ 1606 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1607 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1608 \ 1609 EntryProbe;\ 1610 ResultType ret;\ 1611 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1612 (const ResultType&)ret);\ 1613 \ 1614 va_list args; \ 1615 va_start(args, methodID); \ 1616 JavaValue jvalue(Tag); \ 1617 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1619 va_end(args); \ 1620 ret = jvalue.get_##ResultType(); \ 1621 return ret;\ 1622 JNI_END 1623 1624 // the runtime type of subword integral basic types is integer 1625 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1626 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1627 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1628 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1629 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1631 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1632 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1634 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1635 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1637 1638 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1639 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1641 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1642 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1644 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1645 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1646 // Float and double probes don't return value because dtrace doesn't currently support it 1647 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1648 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1649 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1650 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1651 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1652 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1653 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1654 1655 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1656 , EntryProbe, ReturnProbe) \ 1657 \ 1658 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1659 , ReturnProbe);\ 1660 \ 1661 JNI_ENTRY(ResultType, \ 1662 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1663 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1664 \ 1665 EntryProbe;\ 1666 ResultType ret;\ 1667 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1668 (const ResultType&)ret);\ 1669 \ 1670 JavaValue jvalue(Tag); \ 1671 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1672 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1673 ret = jvalue.get_##ResultType(); \ 1674 return ret;\ 1675 JNI_END 1676 1677 // the runtime type of subword integral basic types is integer 1678 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1679 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1680 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1681 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1682 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1684 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1685 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1687 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1688 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1690 1691 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1692 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1694 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1695 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1697 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1698 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1699 // Float and double probes don't return value because dtrace doesn't currently support it 1700 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1701 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1702 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1703 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1704 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1705 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1706 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1707 1708 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1709 , EntryProbe, ReturnProbe) \ 1710 \ 1711 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1712 , ReturnProbe);\ 1713 \ 1714 JNI_ENTRY(ResultType, \ 1715 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1716 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1717 \ 1718 EntryProbe;\ 1719 ResultType ret;\ 1720 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1721 (const ResultType&)ret);\ 1722 \ 1723 JavaValue jvalue(Tag); \ 1724 JNI_ArgumentPusherArray ap(methodID, args); \ 1725 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1726 ret = jvalue.get_##ResultType(); \ 1727 return ret;\ 1728 JNI_END 1729 1730 // the runtime type of subword integral basic types is integer 1731 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1732 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1734 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1735 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1737 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1738 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1740 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1741 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1743 1744 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1745 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1747 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1748 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1750 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1751 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1752 // Float and double probes don't return value because dtrace doesn't currently support it 1753 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1754 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1755 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1756 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1757 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1758 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1759 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1760 1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1767 1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1769 JNIWrapper("CallNonvirtualVoidMethod"); 1770 1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1773 1774 va_list args; 1775 va_start(args, methodID); 1776 JavaValue jvalue(T_VOID); 1777 JNI_ArgumentPusherVaArg ap(methodID, args); 1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1779 va_end(args); 1780 JNI_END 1781 1782 1783 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1784 JNIWrapper("CallNonvirtualVoidMethodV"); 1785 1786 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1787 env, obj, cls, (uintptr_t) methodID); 1788 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1789 1790 JavaValue jvalue(T_VOID); 1791 JNI_ArgumentPusherVaArg ap(methodID, args); 1792 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1793 JNI_END 1794 1795 1796 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1797 JNIWrapper("CallNonvirtualVoidMethodA"); 1798 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1799 env, obj, cls, (uintptr_t) methodID); 1800 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1801 JavaValue jvalue(T_VOID); 1802 JNI_ArgumentPusherArray ap(methodID, args); 1803 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1804 JNI_END 1805 1806 1807 1808 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1809 , EntryProbe, ResultProbe) \ 1810 \ 1811 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1812 , ResultProbe); \ 1813 \ 1814 JNI_ENTRY(ResultType, \ 1815 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1816 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1817 \ 1818 EntryProbe; \ 1819 ResultType ret = 0;\ 1820 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1821 (const ResultType&)ret);\ 1822 \ 1823 va_list args; \ 1824 va_start(args, methodID); \ 1825 JavaValue jvalue(Tag); \ 1826 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1827 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1828 va_end(args); \ 1829 ret = jvalue.get_##ResultType(); \ 1830 return ret;\ 1831 JNI_END 1832 1833 // the runtime type of subword integral basic types is integer 1834 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1835 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1836 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1837 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1838 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1840 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1841 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1843 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1844 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1846 1847 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1848 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1850 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1851 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1853 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1854 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1855 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1856 // Float and double probes don't return value because dtrace doesn't currently support it 1857 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1858 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1859 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1860 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1861 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1862 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1863 1864 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1865 , EntryProbe, ResultProbe) \ 1866 \ 1867 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1868 , ResultProbe); \ 1869 \ 1870 JNI_ENTRY(ResultType, \ 1871 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1872 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1873 \ 1874 EntryProbe; \ 1875 ResultType ret = 0;\ 1876 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1877 (const ResultType&)ret);\ 1878 \ 1879 JavaValue jvalue(Tag); \ 1880 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1881 /* Make sure class is initialized before trying to invoke its method */ \ 1882 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1883 k()->initialize(CHECK_0); \ 1884 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1885 va_end(args); \ 1886 ret = jvalue.get_##ResultType(); \ 1887 return ret;\ 1888 JNI_END 1889 1890 // the runtime type of subword integral basic types is integer 1891 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1892 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1893 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1894 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1895 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1897 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1898 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1900 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1901 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1903 1904 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1905 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1907 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1908 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1910 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1911 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1912 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1913 // Float and double probes don't return value because dtrace doesn't currently support it 1914 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1915 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1916 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1917 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1918 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1919 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1920 1921 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1922 , EntryProbe, ResultProbe) \ 1923 \ 1924 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1925 , ResultProbe); \ 1926 \ 1927 JNI_ENTRY(ResultType, \ 1928 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1929 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1930 \ 1931 EntryProbe; \ 1932 ResultType ret = 0;\ 1933 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1934 (const ResultType&)ret);\ 1935 \ 1936 JavaValue jvalue(Tag); \ 1937 JNI_ArgumentPusherArray ap(methodID, args); \ 1938 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1939 ret = jvalue.get_##ResultType(); \ 1940 return ret;\ 1941 JNI_END 1942 1943 // the runtime type of subword integral basic types is integer 1944 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1945 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1946 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1947 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1948 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1950 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1951 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1953 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1954 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1956 1957 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1958 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1960 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1961 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1963 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1964 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1965 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1966 // Float and double probes don't return value because dtrace doesn't currently support it 1967 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1968 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1969 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1970 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1971 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1972 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1973 1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1980 1981 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1982 JNIWrapper("CallStaticVoidMethod"); 1983 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1984 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1985 1986 va_list args; 1987 va_start(args, methodID); 1988 JavaValue jvalue(T_VOID); 1989 JNI_ArgumentPusherVaArg ap(methodID, args); 1990 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1991 va_end(args); 1992 JNI_END 1993 1994 1995 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1996 JNIWrapper("CallStaticVoidMethodV"); 1997 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1998 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1999 2000 JavaValue jvalue(T_VOID); 2001 JNI_ArgumentPusherVaArg ap(methodID, args); 2002 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2003 JNI_END 2004 2005 2006 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2007 JNIWrapper("CallStaticVoidMethodA"); 2008 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2009 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2010 2011 JavaValue jvalue(T_VOID); 2012 JNI_ArgumentPusherArray ap(methodID, args); 2013 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2014 JNI_END 2015 2016 2017 // 2018 // Accessing Fields 2019 // 2020 2021 2022 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2023 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2024 2025 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2026 const char *name, const char *sig)) 2027 JNIWrapper("GetFieldID"); 2028 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2029 jfieldID ret = 0; 2030 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2031 2032 // The class should have been loaded (we have an instance of the class 2033 // passed in) so the field and signature should already be in the symbol 2034 // table. If they're not there, the field doesn't exist. 2035 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2036 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2037 if (fieldname == NULL || signame == NULL) { 2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2039 } 2040 KlassHandle k(THREAD, 2041 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2042 // Make sure class is initialized before handing id's out to fields 2043 k()->initialize(CHECK_NULL); 2044 2045 fieldDescriptor fd; 2046 if (!k()->is_instance_klass() || 2047 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2048 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2049 } 2050 2051 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2052 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2053 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2054 return ret; 2055 JNI_END 2056 2057 2058 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2059 JNIWrapper("GetObjectField"); 2060 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2061 oop o = JNIHandles::resolve_non_null(obj); 2062 Klass* k = o->klass(); 2063 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2064 // Keep JVMTI addition small and only check enabled flag here. 2065 // jni_GetField_probe() assumes that is okay to create handles. 2066 if (JvmtiExport::should_post_field_access()) { 2067 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2068 } 2069 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2070 #if INCLUDE_ALL_GCS 2071 // If G1 is enabled and we are accessing the value of the referent 2072 // field in a reference object then we need to register a non-null 2073 // referent with the SATB barrier. 2074 if (UseG1GC || UseShenandoahGC) { 2075 bool needs_barrier = false; 2076 2077 if (ret != NULL && 2078 offset == java_lang_ref_Reference::referent_offset && 2079 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2080 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2081 needs_barrier = true; 2082 } 2083 2084 if (needs_barrier) { 2085 oop referent = JNIHandles::resolve(ret); 2086 G1SATBCardTableModRefBS::enqueue(referent); 2087 } 2088 } 2089 #endif // INCLUDE_ALL_GCS 2090 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2091 return ret; 2092 JNI_END 2093 2094 2095 2096 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2097 , EntryProbe, ReturnProbe) \ 2098 \ 2099 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2100 , ReturnProbe); \ 2101 \ 2102 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2103 JNIWrapper("Get" XSTR(Result) "Field"); \ 2104 \ 2105 EntryProbe; \ 2106 Return ret = 0;\ 2107 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2108 \ 2109 oop o = JNIHandles::resolve_non_null(obj); \ 2110 Klass* k = o->klass(); \ 2111 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2112 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2113 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2114 /* and creates a ResetNoHandleMark. */ \ 2115 if (JvmtiExport::should_post_field_access()) { \ 2116 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2117 } \ 2118 ret = o->Fieldname##_field(offset); \ 2119 return ret; \ 2120 JNI_END 2121 2122 DEFINE_GETFIELD(jboolean, bool, Boolean 2123 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2124 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2125 DEFINE_GETFIELD(jbyte, byte, Byte 2126 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2127 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2128 DEFINE_GETFIELD(jchar, char, Char 2129 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2130 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2131 DEFINE_GETFIELD(jshort, short, Short 2132 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2133 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2134 DEFINE_GETFIELD(jint, int, Int 2135 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2137 DEFINE_GETFIELD(jlong, long, Long 2138 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2139 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2140 // Float and double probes don't return value because dtrace doesn't currently support it 2141 DEFINE_GETFIELD(jfloat, float, Float 2142 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2143 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2144 DEFINE_GETFIELD(jdouble, double, Double 2145 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2146 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2147 2148 address jni_GetBooleanField_addr() { 2149 return (address)jni_GetBooleanField; 2150 } 2151 address jni_GetByteField_addr() { 2152 return (address)jni_GetByteField; 2153 } 2154 address jni_GetCharField_addr() { 2155 return (address)jni_GetCharField; 2156 } 2157 address jni_GetShortField_addr() { 2158 return (address)jni_GetShortField; 2159 } 2160 address jni_GetIntField_addr() { 2161 return (address)jni_GetIntField; 2162 } 2163 address jni_GetLongField_addr() { 2164 return (address)jni_GetLongField; 2165 } 2166 address jni_GetFloatField_addr() { 2167 return (address)jni_GetFloatField; 2168 } 2169 address jni_GetDoubleField_addr() { 2170 return (address)jni_GetDoubleField; 2171 } 2172 2173 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2174 JNIWrapper("SetObjectField"); 2175 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2176 oop o = JNIHandles::resolve_non_null(obj); 2177 Klass* k = o->klass(); 2178 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2179 // Keep JVMTI addition small and only check enabled flag here. 2180 // jni_SetField_probe_nh() assumes that is not okay to create handles 2181 // and creates a ResetNoHandleMark. 2182 if (JvmtiExport::should_post_field_modification()) { 2183 jvalue field_value; 2184 field_value.l = value; 2185 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2186 } 2187 o->obj_field_put(offset, JNIHandles::resolve(value)); 2188 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2189 JNI_END 2190 2191 2192 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2193 , EntryProbe, ReturnProbe) \ 2194 \ 2195 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2196 JNIWrapper("Set" XSTR(Result) "Field"); \ 2197 \ 2198 EntryProbe; \ 2199 \ 2200 oop o = JNIHandles::resolve_non_null(obj); \ 2201 Klass* k = o->klass(); \ 2202 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2203 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2204 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2205 /* and creates a ResetNoHandleMark. */ \ 2206 if (JvmtiExport::should_post_field_modification()) { \ 2207 jvalue field_value; \ 2208 field_value.unionType = value; \ 2209 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2210 } \ 2211 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2212 o->Fieldname##_field_put(offset, value); \ 2213 ReturnProbe; \ 2214 JNI_END 2215 2216 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2217 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2218 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2219 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2220 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2221 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2222 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2223 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2224 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2225 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2226 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2227 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2228 DEFINE_SETFIELD(jint, int, Int, 'I', i 2229 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2230 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2231 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2232 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2233 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2234 // Float and double probes don't return value because dtrace doesn't currently support it 2235 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2236 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2237 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2238 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2239 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2240 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2241 2242 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2243 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2244 2245 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2246 JNIWrapper("ToReflectedField"); 2247 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2248 jobject ret = NULL; 2249 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2250 2251 fieldDescriptor fd; 2252 bool found = false; 2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2254 2255 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2256 2257 if (isStatic) { 2258 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2259 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2260 assert(id->is_static_field_id(), "invalid static field id"); 2261 found = id->find_local_field(&fd); 2262 } else { 2263 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2264 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2265 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2266 } 2267 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2268 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2269 ret = JNIHandles::make_local(env, reflected); 2270 return ret; 2271 JNI_END 2272 2273 2274 // 2275 // Accessing Static Fields 2276 // 2277 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2278 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2279 2280 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2281 const char *name, const char *sig)) 2282 JNIWrapper("GetStaticFieldID"); 2283 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2284 jfieldID ret = NULL; 2285 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2286 2287 // The class should have been loaded (we have an instance of the class 2288 // passed in) so the field and signature should already be in the symbol 2289 // table. If they're not there, the field doesn't exist. 2290 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2291 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2292 if (fieldname == NULL || signame == NULL) { 2293 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2294 } 2295 KlassHandle k(THREAD, 2296 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2297 // Make sure class is initialized before handing id's out to static fields 2298 k()->initialize(CHECK_NULL); 2299 2300 fieldDescriptor fd; 2301 if (!k()->is_instance_klass() || 2302 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2303 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2304 } 2305 2306 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2307 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2308 debug_only(id->set_is_static_field_id();) 2309 2310 debug_only(id->verify(fd.field_holder())); 2311 2312 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2313 return ret; 2314 JNI_END 2315 2316 2317 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2318 JNIWrapper("GetStaticObjectField"); 2319 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2320 #if INCLUDE_JNI_CHECK 2321 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2322 #endif // INCLUDE_JNI_CHECK 2323 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2324 assert(id->is_static_field_id(), "invalid static field id"); 2325 // Keep JVMTI addition small and only check enabled flag here. 2326 // jni_GetField_probe() assumes that is okay to create handles. 2327 if (JvmtiExport::should_post_field_access()) { 2328 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2329 } 2330 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2331 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2332 return ret; 2333 JNI_END 2334 2335 2336 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2337 , EntryProbe, ReturnProbe) \ 2338 \ 2339 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2340 , ReturnProbe); \ 2341 \ 2342 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2343 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2344 EntryProbe; \ 2345 Return ret = 0;\ 2346 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2347 (const Return&)ret);\ 2348 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2349 assert(id->is_static_field_id(), "invalid static field id"); \ 2350 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2351 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2352 if (JvmtiExport::should_post_field_access()) { \ 2353 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2354 } \ 2355 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2356 return ret;\ 2357 JNI_END 2358 2359 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2360 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2361 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2362 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2363 DEFINE_GETSTATICFIELD(jchar, char, Char 2364 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2365 DEFINE_GETSTATICFIELD(jshort, short, Short 2366 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2367 DEFINE_GETSTATICFIELD(jint, int, Int 2368 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2369 DEFINE_GETSTATICFIELD(jlong, long, Long 2370 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2371 // Float and double probes don't return value because dtrace doesn't currently support it 2372 DEFINE_GETSTATICFIELD(jfloat, float, Float 2373 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2374 DEFINE_GETSTATICFIELD(jdouble, double, Double 2375 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2376 2377 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2378 JNIWrapper("SetStaticObjectField"); 2379 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2381 assert(id->is_static_field_id(), "invalid static field id"); 2382 // Keep JVMTI addition small and only check enabled flag here. 2383 // jni_SetField_probe() assumes that is okay to create handles. 2384 if (JvmtiExport::should_post_field_modification()) { 2385 jvalue field_value; 2386 field_value.l = value; 2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2388 } 2389 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2390 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2391 JNI_END 2392 2393 2394 2395 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2396 , EntryProbe, ReturnProbe) \ 2397 \ 2398 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2399 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2400 EntryProbe; \ 2401 \ 2402 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2403 assert(id->is_static_field_id(), "invalid static field id"); \ 2404 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2405 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2406 if (JvmtiExport::should_post_field_modification()) { \ 2407 jvalue field_value; \ 2408 field_value.unionType = value; \ 2409 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2410 } \ 2411 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2412 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2413 ReturnProbe;\ 2414 JNI_END 2415 2416 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2417 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2418 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2419 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2420 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2421 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2422 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2423 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2424 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2425 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2426 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2427 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2428 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2429 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2430 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2431 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2432 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2433 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2434 // Float and double probes don't return value because dtrace doesn't currently support it 2435 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2436 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2437 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2438 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2439 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2440 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2441 2442 // 2443 // String Operations 2444 // 2445 2446 // Unicode Interface 2447 2448 DT_RETURN_MARK_DECL(NewString, jstring 2449 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2450 2451 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2452 JNIWrapper("NewString"); 2453 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2454 jstring ret = NULL; 2455 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2456 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2457 ret = (jstring) JNIHandles::make_local(env, string); 2458 return ret; 2459 JNI_END 2460 2461 2462 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2463 JNIWrapper("GetStringLength"); 2464 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2465 jsize ret = 0; 2466 oop s = JNIHandles::resolve_non_null(string); 2467 if (java_lang_String::value(s) != NULL) { 2468 ret = java_lang_String::length(s); 2469 } 2470 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2471 return ret; 2472 JNI_END 2473 2474 2475 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2476 JNIEnv *env, jstring string, jboolean *isCopy)) 2477 JNIWrapper("GetStringChars"); 2478 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2479 jchar* buf = NULL; 2480 oop s = JNIHandles::resolve_non_null(string); 2481 typeArrayOop s_value = java_lang_String::value(s); 2482 if (s_value != NULL) { 2483 int s_len = java_lang_String::length(s); 2484 bool is_latin1 = java_lang_String::is_latin1(s); 2485 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2486 /* JNI Specification states return NULL on OOM */ 2487 if (buf != NULL) { 2488 if (s_len > 0) { 2489 if (!is_latin1) { 2490 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2491 } else { 2492 for (int i = 0; i < s_len; i++) { 2493 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2494 } 2495 } 2496 } 2497 buf[s_len] = 0; 2498 //%note jni_5 2499 if (isCopy != NULL) { 2500 *isCopy = JNI_TRUE; 2501 } 2502 } 2503 } 2504 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2505 return buf; 2506 JNI_END 2507 2508 2509 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2510 JNIWrapper("ReleaseStringChars"); 2511 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2512 //%note jni_6 2513 if (chars != NULL) { 2514 // Since String objects are supposed to be immutable, don't copy any 2515 // new data back. A bad user will have to go after the char array. 2516 FreeHeap((void*) chars); 2517 } 2518 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2519 JNI_END 2520 2521 2522 // UTF Interface 2523 2524 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2525 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2526 2527 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2528 JNIWrapper("NewStringUTF"); 2529 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2530 jstring ret; 2531 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2532 2533 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2534 ret = (jstring) JNIHandles::make_local(env, result); 2535 return ret; 2536 JNI_END 2537 2538 2539 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2540 JNIWrapper("GetStringUTFLength"); 2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2542 jsize ret = 0; 2543 oop java_string = JNIHandles::resolve_non_null(string); 2544 if (java_lang_String::value(java_string) != NULL) { 2545 ret = java_lang_String::utf8_length(java_string); 2546 } 2547 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2548 return ret; 2549 JNI_END 2550 2551 2552 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2553 JNIWrapper("GetStringUTFChars"); 2554 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2555 char* result = NULL; 2556 oop java_string = JNIHandles::resolve_non_null(string); 2557 if (java_lang_String::value(java_string) != NULL) { 2558 size_t length = java_lang_String::utf8_length(java_string); 2559 /* JNI Specification states return NULL on OOM */ 2560 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2561 if (result != NULL) { 2562 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2563 if (isCopy != NULL) { 2564 *isCopy = JNI_TRUE; 2565 } 2566 } 2567 } 2568 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2569 return result; 2570 JNI_END 2571 2572 2573 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2574 JNIWrapper("ReleaseStringUTFChars"); 2575 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2576 if (chars != NULL) { 2577 FreeHeap((char*) chars); 2578 } 2579 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2580 JNI_END 2581 2582 2583 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2584 JNIWrapper("GetArrayLength"); 2585 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2586 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2587 assert(a->is_array(), "must be array"); 2588 jsize ret = a->length(); 2589 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2590 return ret; 2591 JNI_END 2592 2593 2594 // 2595 // Object Array Operations 2596 // 2597 2598 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2599 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2600 2601 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2602 JNIWrapper("NewObjectArray"); 2603 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2604 jobjectArray ret = NULL; 2605 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2606 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2607 Klass* ako = ek()->array_klass(CHECK_NULL); 2608 KlassHandle ak = KlassHandle(THREAD, ako); 2609 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2610 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2611 oop initial_value = JNIHandles::resolve(initialElement); 2612 if (initial_value != NULL) { // array already initialized with NULL 2613 for (int index = 0; index < length; index++) { 2614 result->obj_at_put(index, initial_value); 2615 } 2616 } 2617 ret = (jobjectArray) JNIHandles::make_local(env, result); 2618 return ret; 2619 JNI_END 2620 2621 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2622 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2623 2624 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2625 JNIWrapper("GetObjectArrayElement"); 2626 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2627 jobject ret = NULL; 2628 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2629 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2630 if (a->is_within_bounds(index)) { 2631 ret = JNIHandles::make_local(env, a->obj_at(index)); 2632 return ret; 2633 } else { 2634 char buf[jintAsStringSize]; 2635 sprintf(buf, "%d", index); 2636 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2637 } 2638 JNI_END 2639 2640 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2641 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2642 2643 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2644 JNIWrapper("SetObjectArrayElement"); 2645 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2646 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2647 2648 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2649 oop v = JNIHandles::resolve(value); 2650 if (a->is_within_bounds(index)) { 2651 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2652 a->obj_at_put(index, v); 2653 } else { 2654 THROW(vmSymbols::java_lang_ArrayStoreException()); 2655 } 2656 } else { 2657 char buf[jintAsStringSize]; 2658 sprintf(buf, "%d", index); 2659 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2660 } 2661 JNI_END 2662 2663 2664 2665 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2666 ,EntryProbe,ReturnProbe) \ 2667 \ 2668 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2669 , ReturnProbe); \ 2670 \ 2671 JNI_ENTRY(Return, \ 2672 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2673 JNIWrapper("New" XSTR(Result) "Array"); \ 2674 EntryProbe; \ 2675 Return ret = NULL;\ 2676 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2677 \ 2678 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2679 ret = (Return) JNIHandles::make_local(env, obj); \ 2680 return ret;\ 2681 JNI_END 2682 2683 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2684 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2685 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2686 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2687 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2688 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2689 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2690 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2691 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2692 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2693 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2694 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2695 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2696 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2697 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2698 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2699 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2700 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2701 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2702 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2703 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2704 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2705 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2706 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2707 2708 // Return an address which will fault if the caller writes to it. 2709 2710 static char* get_bad_address() { 2711 static char* bad_address = NULL; 2712 if (bad_address == NULL) { 2713 size_t size = os::vm_allocation_granularity(); 2714 bad_address = os::reserve_memory(size); 2715 if (bad_address != NULL) { 2716 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2717 /*is_committed*/false); 2718 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2719 } 2720 } 2721 return bad_address; 2722 } 2723 2724 2725 2726 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2727 , EntryProbe, ReturnProbe) \ 2728 \ 2729 JNI_QUICK_ENTRY(ElementType*, \ 2730 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2731 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2732 EntryProbe; \ 2733 /* allocate an chunk of memory in c land */ \ 2734 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2735 a = typeArrayOop(oopDesc::bs()->read_barrier(a)); \ 2736 ElementType* result; \ 2737 int len = a->length(); \ 2738 if (len == 0) { \ 2739 /* Empty array: legal but useless, can't return NULL. \ 2740 * Return a pointer to something useless. \ 2741 * Avoid asserts in typeArrayOop. */ \ 2742 result = (ElementType*)get_bad_address(); \ 2743 } else { \ 2744 /* JNI Specification states return NULL on OOM */ \ 2745 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2746 if (result != NULL) { \ 2747 /* copy the array to the c chunk */ \ 2748 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2749 if (isCopy) { \ 2750 *isCopy = JNI_TRUE; \ 2751 } \ 2752 } \ 2753 } \ 2754 ReturnProbe; \ 2755 return result; \ 2756 JNI_END 2757 2758 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2759 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2760 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2761 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2762 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2763 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2764 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2765 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2766 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2767 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2768 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2769 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2770 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2771 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2772 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2773 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2774 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2775 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2776 // Float and double probes don't return value because dtrace doesn't currently support it 2777 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2778 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2779 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2780 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2781 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2782 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2783 2784 2785 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2786 , EntryProbe, ReturnProbe);\ 2787 \ 2788 JNI_QUICK_ENTRY(void, \ 2789 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2790 ElementType *buf, jint mode)) \ 2791 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2792 EntryProbe; \ 2793 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2794 a = typeArrayOop(oopDesc::bs()->write_barrier(a)); \ 2795 int len = a->length(); \ 2796 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2797 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2798 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2799 } \ 2800 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2801 FreeHeap(buf); \ 2802 } \ 2803 } \ 2804 ReturnProbe; \ 2805 JNI_END 2806 2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2808 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2809 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2811 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2812 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2814 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2815 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2817 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2818 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2820 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2821 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2823 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2824 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2826 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2827 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2828 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2829 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2830 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2831 2832 2833 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2834 , EntryProbe, ReturnProbe); \ 2835 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2836 , ReturnProbe); \ 2837 \ 2838 JNI_ENTRY(void, \ 2839 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2840 jsize len, ElementType *buf)) \ 2841 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2842 EntryProbe; \ 2843 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2844 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2845 src = typeArrayOop(oopDesc::bs()->read_barrier(src)); \ 2846 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2847 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2848 } else { \ 2849 if (len > 0) { \ 2850 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2851 memcpy((u_char*) buf, \ 2852 (u_char*) src->Tag##_at_addr(start), \ 2853 len << sc); \ 2854 } \ 2855 } \ 2856 JNI_END 2857 2858 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2859 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2860 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2861 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2862 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2863 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2864 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2865 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2866 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2867 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2868 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2869 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2870 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2871 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2872 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2873 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2874 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2875 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2876 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2877 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2878 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2879 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2880 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2881 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2882 2883 2884 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2885 , EntryProbe, ReturnProbe); \ 2886 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2887 ,ReturnProbe); \ 2888 \ 2889 JNI_ENTRY(void, \ 2890 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2891 jsize len, const ElementType *buf)) \ 2892 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2893 EntryProbe; \ 2894 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2895 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2896 dst = typeArrayOop(oopDesc::bs()->write_barrier(dst)); \ 2897 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2898 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2899 } else { \ 2900 if (len > 0) { \ 2901 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2902 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2903 (u_char*) buf, \ 2904 len << sc); \ 2905 } \ 2906 } \ 2907 JNI_END 2908 2909 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2910 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2911 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2912 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2913 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2914 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2915 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2916 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2917 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2918 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2919 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2920 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2921 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2922 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2923 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2924 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2925 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2926 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2927 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2928 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2929 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2930 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2931 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2932 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2933 2934 2935 // 2936 // Interception of natives 2937 // 2938 2939 // The RegisterNatives call being attempted tried to register with a method that 2940 // is not native. Ask JVM TI what prefixes have been specified. Then check 2941 // to see if the native method is now wrapped with the prefixes. See the 2942 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2943 static Method* find_prefixed_native(KlassHandle k, 2944 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(KlassHandle 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 KlassHandle h_k(thread, 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", h_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(h_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, oopDesc::bs()->write_barrier(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, oopDesc::bs()->write_barrier(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 a = oopDesc::bs()->write_barrier(a); 3187 assert(a->is_array(), "just checking"); 3188 BasicType type; 3189 if (a->is_objArray()) { 3190 type = T_OBJECT; 3191 } else { 3192 type = TypeArrayKlass::cast(a->klass())->element_type(); 3193 } 3194 void* ret = arrayOop(a)->base(type); 3195 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3196 return ret; 3197 JNI_END 3198 3199 3200 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3201 JNIWrapper("ReleasePrimitiveArrayCritical"); 3202 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3203 // The array, carray and mode arguments are ignored 3204 GCLocker::unlock_critical(thread); 3205 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3206 JNI_END 3207 3208 3209 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3210 JNIWrapper("GetStringCritical"); 3211 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3212 GCLocker::lock_critical(thread); 3213 oop s = JNIHandles::resolve_non_null(string); 3214 typeArrayOop s_value = java_lang_String::value(s); 3215 bool is_latin1 = java_lang_String::is_latin1(s); 3216 if (isCopy != NULL) { 3217 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3218 } 3219 jchar* ret; 3220 if (!is_latin1) { 3221 ret = (jchar*) s_value->base(T_CHAR); 3222 } else { 3223 // Inflate latin1 encoded string to UTF16 3224 int s_len = java_lang_String::length(s); 3225 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3226 /* JNI Specification states return NULL on OOM */ 3227 if (ret != NULL) { 3228 for (int i = 0; i < s_len; i++) { 3229 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3230 } 3231 ret[s_len] = 0; 3232 } 3233 } 3234 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3235 return ret; 3236 JNI_END 3237 3238 3239 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3240 JNIWrapper("ReleaseStringCritical"); 3241 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3242 // The str and chars arguments are ignored for UTF16 strings 3243 oop s = JNIHandles::resolve_non_null(str); 3244 bool is_latin1 = java_lang_String::is_latin1(s); 3245 if (is_latin1) { 3246 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3247 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3248 FREE_C_HEAP_ARRAY(jchar, chars); 3249 } 3250 GCLocker::unlock_critical(thread); 3251 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3252 JNI_END 3253 3254 3255 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3256 JNIWrapper("jni_NewWeakGlobalRef"); 3257 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3258 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3259 jweak ret = JNIHandles::make_weak_global(ref_handle); 3260 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3261 return ret; 3262 JNI_END 3263 3264 // Must be JNI_ENTRY (with HandleMark) 3265 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3266 JNIWrapper("jni_DeleteWeakGlobalRef"); 3267 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3268 JNIHandles::destroy_weak_global(ref); 3269 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3270 JNI_END 3271 3272 3273 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3274 JNIWrapper("jni_ExceptionCheck"); 3275 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3276 jni_check_async_exceptions(thread); 3277 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3278 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3279 return ret; 3280 JNI_END 3281 3282 3283 // Initialization state for three routines below relating to 3284 // java.nio.DirectBuffers 3285 static jint directBufferSupportInitializeStarted = 0; 3286 static volatile jint directBufferSupportInitializeEnded = 0; 3287 static volatile jint directBufferSupportInitializeFailed = 0; 3288 static jclass bufferClass = NULL; 3289 static jclass directBufferClass = NULL; 3290 static jclass directByteBufferClass = NULL; 3291 static jmethodID directByteBufferConstructor = NULL; 3292 static jfieldID directBufferAddressField = NULL; 3293 static jfieldID bufferCapacityField = NULL; 3294 3295 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3296 Handle loader; // null (bootstrap) loader 3297 Handle protection_domain; // null protection domain 3298 3299 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3300 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3301 3302 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3303 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3304 } 3305 return result; 3306 } 3307 3308 // These lookups are done with the NULL (bootstrap) ClassLoader to 3309 // circumvent any security checks that would be done by jni_FindClass. 3310 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3311 { 3312 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3313 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3314 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3315 return true; 3316 } 3317 JNI_END 3318 3319 3320 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3321 if (directBufferSupportInitializeFailed) { 3322 return false; 3323 } 3324 3325 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3326 if (!lookupDirectBufferClasses(env)) { 3327 directBufferSupportInitializeFailed = 1; 3328 return false; 3329 } 3330 3331 // Make global references for these 3332 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3333 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3334 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3335 3336 // Get needed field and method IDs 3337 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3338 if (env->ExceptionCheck()) { 3339 env->ExceptionClear(); 3340 directBufferSupportInitializeFailed = 1; 3341 return false; 3342 } 3343 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3344 if (env->ExceptionCheck()) { 3345 env->ExceptionClear(); 3346 directBufferSupportInitializeFailed = 1; 3347 return false; 3348 } 3349 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3350 if (env->ExceptionCheck()) { 3351 env->ExceptionClear(); 3352 directBufferSupportInitializeFailed = 1; 3353 return false; 3354 } 3355 3356 if ((directByteBufferConstructor == NULL) || 3357 (directBufferAddressField == NULL) || 3358 (bufferCapacityField == NULL)) { 3359 directBufferSupportInitializeFailed = 1; 3360 return false; 3361 } 3362 3363 directBufferSupportInitializeEnded = 1; 3364 } else { 3365 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3366 os::naked_yield(); 3367 } 3368 } 3369 3370 return !directBufferSupportInitializeFailed; 3371 } 3372 3373 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3374 { 3375 // thread_from_jni_environment() will block if VM is gone. 3376 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3377 3378 JNIWrapper("jni_NewDirectByteBuffer"); 3379 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3380 3381 if (!directBufferSupportInitializeEnded) { 3382 if (!initializeDirectBufferSupport(env, thread)) { 3383 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3384 return NULL; 3385 } 3386 } 3387 3388 // Being paranoid about accidental sign extension on address 3389 jlong addr = (jlong) ((uintptr_t) address); 3390 // NOTE that package-private DirectByteBuffer constructor currently 3391 // takes int capacity 3392 jint cap = (jint) capacity; 3393 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3394 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3395 return ret; 3396 } 3397 3398 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3399 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3400 3401 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3402 { 3403 // thread_from_jni_environment() will block if VM is gone. 3404 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3405 3406 JNIWrapper("jni_GetDirectBufferAddress"); 3407 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3408 void* ret = NULL; 3409 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3410 3411 if (!directBufferSupportInitializeEnded) { 3412 if (!initializeDirectBufferSupport(env, thread)) { 3413 return 0; 3414 } 3415 } 3416 3417 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3418 return 0; 3419 } 3420 3421 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3422 return ret; 3423 } 3424 3425 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3426 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3427 3428 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3429 { 3430 // thread_from_jni_environment() will block if VM is gone. 3431 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3432 3433 JNIWrapper("jni_GetDirectBufferCapacity"); 3434 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3435 jlong ret = -1; 3436 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3437 3438 if (!directBufferSupportInitializeEnded) { 3439 if (!initializeDirectBufferSupport(env, thread)) { 3440 ret = 0; 3441 return ret; 3442 } 3443 } 3444 3445 if (buf == NULL) { 3446 return -1; 3447 } 3448 3449 if (!env->IsInstanceOf(buf, directBufferClass)) { 3450 return -1; 3451 } 3452 3453 // NOTE that capacity is currently an int in the implementation 3454 ret = env->GetIntField(buf, bufferCapacityField); 3455 return ret; 3456 } 3457 3458 3459 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3460 JNIWrapper("GetVersion"); 3461 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3462 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3463 return CurrentVersion; 3464 JNI_END 3465 3466 extern struct JavaVM_ main_vm; 3467 3468 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3469 JNIWrapper("jni_GetJavaVM"); 3470 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3471 *vm = (JavaVM *)(&main_vm); 3472 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3473 return JNI_OK; 3474 JNI_END 3475 3476 3477 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3478 JNIWrapper("GetModule"); 3479 return Modules::get_module(clazz, THREAD); 3480 JNI_END 3481 3482 3483 JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2)) 3484 JNIWrapper("AddModuleReads"); 3485 if (m1 == NULL || m2 == NULL) { 3486 THROW(vmSymbols::java_lang_NullPointerException()); 3487 } 3488 JavaValue result(T_VOID); 3489 Handle m1_h(THREAD, JNIHandles::resolve(m1)); 3490 if (!java_lang_reflect_Module::is_instance(m1_h())) { 3491 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object"); 3492 } 3493 Handle m2_h(THREAD, JNIHandles::resolve(m2)); 3494 if (!java_lang_reflect_Module::is_instance(m2_h())) { 3495 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object"); 3496 } 3497 JavaCalls::call_static(&result, 3498 KlassHandle(THREAD, SystemDictionary::module_Modules_klass()), 3499 vmSymbols::addReads_name(), 3500 vmSymbols::addReads_signature(), 3501 m1_h, 3502 m2_h, 3503 THREAD); 3504 JNI_END 3505 3506 3507 JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2)) 3508 JNIWrapper("CanReadModule"); 3509 if (m1 == NULL || m2 == NULL) { 3510 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3511 } 3512 jboolean res = Modules::can_read_module(m1, m2, CHECK_false); 3513 return res; 3514 JNI_END 3515 3516 3517 // Structure containing all jni functions 3518 struct JNINativeInterface_ jni_NativeInterface = { 3519 NULL, 3520 NULL, 3521 NULL, 3522 3523 NULL, 3524 3525 jni_GetVersion, 3526 3527 jni_DefineClass, 3528 jni_FindClass, 3529 3530 jni_FromReflectedMethod, 3531 jni_FromReflectedField, 3532 3533 jni_ToReflectedMethod, 3534 3535 jni_GetSuperclass, 3536 jni_IsAssignableFrom, 3537 3538 jni_ToReflectedField, 3539 3540 jni_Throw, 3541 jni_ThrowNew, 3542 jni_ExceptionOccurred, 3543 jni_ExceptionDescribe, 3544 jni_ExceptionClear, 3545 jni_FatalError, 3546 3547 jni_PushLocalFrame, 3548 jni_PopLocalFrame, 3549 3550 jni_NewGlobalRef, 3551 jni_DeleteGlobalRef, 3552 jni_DeleteLocalRef, 3553 jni_IsSameObject, 3554 3555 jni_NewLocalRef, 3556 jni_EnsureLocalCapacity, 3557 3558 jni_AllocObject, 3559 jni_NewObject, 3560 jni_NewObjectV, 3561 jni_NewObjectA, 3562 3563 jni_GetObjectClass, 3564 jni_IsInstanceOf, 3565 3566 jni_GetMethodID, 3567 3568 jni_CallObjectMethod, 3569 jni_CallObjectMethodV, 3570 jni_CallObjectMethodA, 3571 jni_CallBooleanMethod, 3572 jni_CallBooleanMethodV, 3573 jni_CallBooleanMethodA, 3574 jni_CallByteMethod, 3575 jni_CallByteMethodV, 3576 jni_CallByteMethodA, 3577 jni_CallCharMethod, 3578 jni_CallCharMethodV, 3579 jni_CallCharMethodA, 3580 jni_CallShortMethod, 3581 jni_CallShortMethodV, 3582 jni_CallShortMethodA, 3583 jni_CallIntMethod, 3584 jni_CallIntMethodV, 3585 jni_CallIntMethodA, 3586 jni_CallLongMethod, 3587 jni_CallLongMethodV, 3588 jni_CallLongMethodA, 3589 jni_CallFloatMethod, 3590 jni_CallFloatMethodV, 3591 jni_CallFloatMethodA, 3592 jni_CallDoubleMethod, 3593 jni_CallDoubleMethodV, 3594 jni_CallDoubleMethodA, 3595 jni_CallVoidMethod, 3596 jni_CallVoidMethodV, 3597 jni_CallVoidMethodA, 3598 3599 jni_CallNonvirtualObjectMethod, 3600 jni_CallNonvirtualObjectMethodV, 3601 jni_CallNonvirtualObjectMethodA, 3602 jni_CallNonvirtualBooleanMethod, 3603 jni_CallNonvirtualBooleanMethodV, 3604 jni_CallNonvirtualBooleanMethodA, 3605 jni_CallNonvirtualByteMethod, 3606 jni_CallNonvirtualByteMethodV, 3607 jni_CallNonvirtualByteMethodA, 3608 jni_CallNonvirtualCharMethod, 3609 jni_CallNonvirtualCharMethodV, 3610 jni_CallNonvirtualCharMethodA, 3611 jni_CallNonvirtualShortMethod, 3612 jni_CallNonvirtualShortMethodV, 3613 jni_CallNonvirtualShortMethodA, 3614 jni_CallNonvirtualIntMethod, 3615 jni_CallNonvirtualIntMethodV, 3616 jni_CallNonvirtualIntMethodA, 3617 jni_CallNonvirtualLongMethod, 3618 jni_CallNonvirtualLongMethodV, 3619 jni_CallNonvirtualLongMethodA, 3620 jni_CallNonvirtualFloatMethod, 3621 jni_CallNonvirtualFloatMethodV, 3622 jni_CallNonvirtualFloatMethodA, 3623 jni_CallNonvirtualDoubleMethod, 3624 jni_CallNonvirtualDoubleMethodV, 3625 jni_CallNonvirtualDoubleMethodA, 3626 jni_CallNonvirtualVoidMethod, 3627 jni_CallNonvirtualVoidMethodV, 3628 jni_CallNonvirtualVoidMethodA, 3629 3630 jni_GetFieldID, 3631 3632 jni_GetObjectField, 3633 jni_GetBooleanField, 3634 jni_GetByteField, 3635 jni_GetCharField, 3636 jni_GetShortField, 3637 jni_GetIntField, 3638 jni_GetLongField, 3639 jni_GetFloatField, 3640 jni_GetDoubleField, 3641 3642 jni_SetObjectField, 3643 jni_SetBooleanField, 3644 jni_SetByteField, 3645 jni_SetCharField, 3646 jni_SetShortField, 3647 jni_SetIntField, 3648 jni_SetLongField, 3649 jni_SetFloatField, 3650 jni_SetDoubleField, 3651 3652 jni_GetStaticMethodID, 3653 3654 jni_CallStaticObjectMethod, 3655 jni_CallStaticObjectMethodV, 3656 jni_CallStaticObjectMethodA, 3657 jni_CallStaticBooleanMethod, 3658 jni_CallStaticBooleanMethodV, 3659 jni_CallStaticBooleanMethodA, 3660 jni_CallStaticByteMethod, 3661 jni_CallStaticByteMethodV, 3662 jni_CallStaticByteMethodA, 3663 jni_CallStaticCharMethod, 3664 jni_CallStaticCharMethodV, 3665 jni_CallStaticCharMethodA, 3666 jni_CallStaticShortMethod, 3667 jni_CallStaticShortMethodV, 3668 jni_CallStaticShortMethodA, 3669 jni_CallStaticIntMethod, 3670 jni_CallStaticIntMethodV, 3671 jni_CallStaticIntMethodA, 3672 jni_CallStaticLongMethod, 3673 jni_CallStaticLongMethodV, 3674 jni_CallStaticLongMethodA, 3675 jni_CallStaticFloatMethod, 3676 jni_CallStaticFloatMethodV, 3677 jni_CallStaticFloatMethodA, 3678 jni_CallStaticDoubleMethod, 3679 jni_CallStaticDoubleMethodV, 3680 jni_CallStaticDoubleMethodA, 3681 jni_CallStaticVoidMethod, 3682 jni_CallStaticVoidMethodV, 3683 jni_CallStaticVoidMethodA, 3684 3685 jni_GetStaticFieldID, 3686 3687 jni_GetStaticObjectField, 3688 jni_GetStaticBooleanField, 3689 jni_GetStaticByteField, 3690 jni_GetStaticCharField, 3691 jni_GetStaticShortField, 3692 jni_GetStaticIntField, 3693 jni_GetStaticLongField, 3694 jni_GetStaticFloatField, 3695 jni_GetStaticDoubleField, 3696 3697 jni_SetStaticObjectField, 3698 jni_SetStaticBooleanField, 3699 jni_SetStaticByteField, 3700 jni_SetStaticCharField, 3701 jni_SetStaticShortField, 3702 jni_SetStaticIntField, 3703 jni_SetStaticLongField, 3704 jni_SetStaticFloatField, 3705 jni_SetStaticDoubleField, 3706 3707 jni_NewString, 3708 jni_GetStringLength, 3709 jni_GetStringChars, 3710 jni_ReleaseStringChars, 3711 3712 jni_NewStringUTF, 3713 jni_GetStringUTFLength, 3714 jni_GetStringUTFChars, 3715 jni_ReleaseStringUTFChars, 3716 3717 jni_GetArrayLength, 3718 3719 jni_NewObjectArray, 3720 jni_GetObjectArrayElement, 3721 jni_SetObjectArrayElement, 3722 3723 jni_NewBooleanArray, 3724 jni_NewByteArray, 3725 jni_NewCharArray, 3726 jni_NewShortArray, 3727 jni_NewIntArray, 3728 jni_NewLongArray, 3729 jni_NewFloatArray, 3730 jni_NewDoubleArray, 3731 3732 jni_GetBooleanArrayElements, 3733 jni_GetByteArrayElements, 3734 jni_GetCharArrayElements, 3735 jni_GetShortArrayElements, 3736 jni_GetIntArrayElements, 3737 jni_GetLongArrayElements, 3738 jni_GetFloatArrayElements, 3739 jni_GetDoubleArrayElements, 3740 3741 jni_ReleaseBooleanArrayElements, 3742 jni_ReleaseByteArrayElements, 3743 jni_ReleaseCharArrayElements, 3744 jni_ReleaseShortArrayElements, 3745 jni_ReleaseIntArrayElements, 3746 jni_ReleaseLongArrayElements, 3747 jni_ReleaseFloatArrayElements, 3748 jni_ReleaseDoubleArrayElements, 3749 3750 jni_GetBooleanArrayRegion, 3751 jni_GetByteArrayRegion, 3752 jni_GetCharArrayRegion, 3753 jni_GetShortArrayRegion, 3754 jni_GetIntArrayRegion, 3755 jni_GetLongArrayRegion, 3756 jni_GetFloatArrayRegion, 3757 jni_GetDoubleArrayRegion, 3758 3759 jni_SetBooleanArrayRegion, 3760 jni_SetByteArrayRegion, 3761 jni_SetCharArrayRegion, 3762 jni_SetShortArrayRegion, 3763 jni_SetIntArrayRegion, 3764 jni_SetLongArrayRegion, 3765 jni_SetFloatArrayRegion, 3766 jni_SetDoubleArrayRegion, 3767 3768 jni_RegisterNatives, 3769 jni_UnregisterNatives, 3770 3771 jni_MonitorEnter, 3772 jni_MonitorExit, 3773 3774 jni_GetJavaVM, 3775 3776 jni_GetStringRegion, 3777 jni_GetStringUTFRegion, 3778 3779 jni_GetPrimitiveArrayCritical, 3780 jni_ReleasePrimitiveArrayCritical, 3781 3782 jni_GetStringCritical, 3783 jni_ReleaseStringCritical, 3784 3785 jni_NewWeakGlobalRef, 3786 jni_DeleteWeakGlobalRef, 3787 3788 jni_ExceptionCheck, 3789 3790 jni_NewDirectByteBuffer, 3791 jni_GetDirectBufferAddress, 3792 jni_GetDirectBufferCapacity, 3793 3794 // New 1_6 features 3795 3796 jni_GetObjectRefType, 3797 3798 // Module features 3799 3800 jni_GetModule, 3801 jni_AddModuleReads, 3802 jni_CanReadModule 3803 }; 3804 3805 3806 // For jvmti use to modify jni function table. 3807 // Java threads in native contiues to run until it is transitioned 3808 // to VM at safepoint. Before the transition or before it is blocked 3809 // for safepoint it may access jni function table. VM could crash if 3810 // any java thread access the jni function table in the middle of memcpy. 3811 // To avoid this each function pointers are copied automically. 3812 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3813 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3814 intptr_t *a = (intptr_t *) jni_functions(); 3815 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3816 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3817 Atomic::store_ptr(*b++, a++); 3818 } 3819 } 3820 3821 void quicken_jni_functions() { 3822 // Replace Get<Primitive>Field with fast versions 3823 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3824 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3825 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3826 // windows x86 currently needs SEH wrapper and the gain of the fast 3827 // versions currently isn't certain for server vm on uniprocessor. 3828 && os::is_MP() 3829 #endif 3830 ) { 3831 address func; 3832 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3833 if (func != (address)-1) { 3834 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3835 } 3836 func = JNI_FastGetField::generate_fast_get_byte_field(); 3837 if (func != (address)-1) { 3838 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3839 } 3840 func = JNI_FastGetField::generate_fast_get_char_field(); 3841 if (func != (address)-1) { 3842 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3843 } 3844 func = JNI_FastGetField::generate_fast_get_short_field(); 3845 if (func != (address)-1) { 3846 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3847 } 3848 func = JNI_FastGetField::generate_fast_get_int_field(); 3849 if (func != (address)-1) { 3850 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3851 } 3852 func = JNI_FastGetField::generate_fast_get_long_field(); 3853 if (func != (address)-1) { 3854 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3855 } 3856 func = JNI_FastGetField::generate_fast_get_float_field(); 3857 if (func != (address)-1) { 3858 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3859 } 3860 func = JNI_FastGetField::generate_fast_get_double_field(); 3861 if (func != (address)-1) { 3862 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3863 } 3864 } 3865 } 3866 3867 // Returns the function structure 3868 struct JNINativeInterface_* jni_functions() { 3869 #if INCLUDE_JNI_CHECK 3870 if (CheckJNICalls) return jni_functions_check(); 3871 #endif // INCLUDE_JNI_CHECK 3872 return &jni_NativeInterface; 3873 } 3874 3875 // Returns the function structure 3876 struct JNINativeInterface_* jni_functions_nocheck() { 3877 return &jni_NativeInterface; 3878 } 3879 3880 3881 // Invocation API 3882 3883 3884 // Forward declaration 3885 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3886 3887 // Global invocation API vars 3888 volatile jint vm_created = 0; 3889 // Indicate whether it is safe to recreate VM 3890 volatile jint safe_to_recreate_vm = 1; 3891 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3892 3893 3894 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3895 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3896 3897 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3898 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3899 3900 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3901 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3902 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3903 jint ret = JNI_ERR; 3904 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3905 3906 if (Threads::is_supported_jni_version(args->version)) { 3907 ret = JNI_OK; 3908 } 3909 // 1.1 style no longer supported in hotspot. 3910 // According the JNI spec, we should update args->version on return. 3911 // We also use the structure to communicate with launcher about default 3912 // stack size. 3913 if (args->version == JNI_VERSION_1_1) { 3914 args->version = JNI_VERSION_1_2; 3915 // javaStackSize is int in arguments structure 3916 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3917 args->javaStackSize = (jint)(ThreadStackSize * K); 3918 } 3919 return ret; 3920 } 3921 3922 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3923 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3924 3925 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3926 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3927 3928 jint result = JNI_ERR; 3929 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3930 3931 // We're about to use Atomic::xchg for synchronization. Some Zero 3932 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3933 // but __sync_lock_test_and_set is not guaranteed to do what we want 3934 // on all architectures. So we check it works before relying on it. 3935 #if defined(ZERO) && defined(ASSERT) 3936 { 3937 jint a = 0xcafebabe; 3938 jint b = Atomic::xchg(0xdeadbeef, &a); 3939 void *c = &a; 3940 void *d = Atomic::xchg_ptr(&b, &c); 3941 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3942 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3943 } 3944 #endif // ZERO && ASSERT 3945 3946 // At the moment it's only possible to have one Java VM, 3947 // since some of the runtime state is in global variables. 3948 3949 // We cannot use our mutex locks here, since they only work on 3950 // Threads. We do an atomic compare and exchange to ensure only 3951 // one thread can call this method at a time 3952 3953 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3954 // the add/dec implementations are dependent on whether we are running 3955 // on a multiprocessor, and at this stage of initialization the os::is_MP 3956 // function used to determine this will always return false. Atomic::xchg 3957 // does not have this problem. 3958 if (Atomic::xchg(1, &vm_created) == 1) { 3959 return JNI_EEXIST; // already created, or create attempt in progress 3960 } 3961 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3962 return JNI_ERR; // someone tried and failed and retry not allowed. 3963 } 3964 3965 assert(vm_created == 1, "vm_created is true during the creation"); 3966 3967 /** 3968 * Certain errors during initialization are recoverable and do not 3969 * prevent this method from being called again at a later time 3970 * (perhaps with different arguments). However, at a certain 3971 * point during initialization if an error occurs we cannot allow 3972 * this function to be called again (or it will crash). In those 3973 * situations, the 'canTryAgain' flag is set to false, which atomically 3974 * sets safe_to_recreate_vm to 1, such that any new call to 3975 * JNI_CreateJavaVM will immediately fail using the above logic. 3976 */ 3977 bool can_try_again = true; 3978 3979 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3980 if (result == JNI_OK) { 3981 JavaThread *thread = JavaThread::current(); 3982 assert(!thread->has_pending_exception(), "should have returned not OK"); 3983 /* thread is thread_in_vm here */ 3984 *vm = (JavaVM *)(&main_vm); 3985 *(JNIEnv**)penv = thread->jni_environment(); 3986 3987 #if INCLUDE_JVMCI 3988 if (EnableJVMCI) { 3989 if (UseJVMCICompiler) { 3990 // JVMCI is initialized on a CompilerThread 3991 if (BootstrapJVMCI) { 3992 JavaThread* THREAD = thread; 3993 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3994 compiler->bootstrap(THREAD); 3995 if (HAS_PENDING_EXCEPTION) { 3996 HandleMark hm; 3997 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3998 } 3999 } 4000 } 4001 } 4002 #endif 4003 4004 // Tracks the time application was running before GC 4005 RuntimeService::record_application_start(); 4006 4007 // Notify JVMTI 4008 if (JvmtiExport::should_post_thread_life()) { 4009 JvmtiExport::post_thread_start(thread); 4010 } 4011 4012 EventThreadStart event; 4013 if (event.should_commit()) { 4014 event.set_thread(THREAD_TRACE_ID(thread)); 4015 event.commit(); 4016 } 4017 4018 #ifndef PRODUCT 4019 // Check if we should compile all classes on bootclasspath 4020 if (CompileTheWorld) ClassLoader::compile_the_world(); 4021 if (ReplayCompiles) ciReplay::replay(thread); 4022 4023 // Some platforms (like Win*) need a wrapper around these test 4024 // functions in order to properly handle error conditions. 4025 test_error_handler(); 4026 if (ExecuteInternalVMTests) { 4027 InternalVMTests::run(); 4028 } 4029 #endif 4030 4031 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4032 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4033 } else { 4034 // If create_vm exits because of a pending exception, exit with that 4035 // exception. In the future when we figure out how to reclaim memory, 4036 // we may be able to exit with JNI_ERR and allow the calling application 4037 // to continue. 4038 if (Universe::is_fully_initialized()) { 4039 // otherwise no pending exception possible - VM will already have aborted 4040 JavaThread* THREAD = JavaThread::current(); 4041 if (HAS_PENDING_EXCEPTION) { 4042 HandleMark hm; 4043 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4044 } 4045 } 4046 4047 if (can_try_again) { 4048 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4049 safe_to_recreate_vm = 1; 4050 } 4051 4052 // Creation failed. We must reset vm_created 4053 *vm = 0; 4054 *(JNIEnv**)penv = 0; 4055 // reset vm_created last to avoid race condition. Use OrderAccess to 4056 // control both compiler and architectural-based reordering. 4057 OrderAccess::release_store(&vm_created, 0); 4058 } 4059 4060 // Flush stdout and stderr before exit. 4061 fflush(stdout); 4062 fflush(stderr); 4063 4064 return result; 4065 4066 } 4067 4068 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4069 jint result = 0; 4070 // On Windows, let CreateJavaVM run with SEH protection 4071 #ifdef _WIN32 4072 __try { 4073 #endif 4074 result = JNI_CreateJavaVM_inner(vm, penv, args); 4075 #ifdef _WIN32 4076 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4077 // Nothing to do. 4078 } 4079 #endif 4080 return result; 4081 } 4082 4083 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4084 // See bug 4367188, the wrapper can sometimes cause VM crashes 4085 // JNIWrapper("GetCreatedJavaVMs"); 4086 4087 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4088 4089 if (vm_created) { 4090 if (numVMs != NULL) *numVMs = 1; 4091 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4092 } else { 4093 if (numVMs != NULL) *numVMs = 0; 4094 } 4095 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4096 return JNI_OK; 4097 } 4098 4099 extern "C" { 4100 4101 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4102 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4103 4104 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4105 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4106 jint res = JNI_ERR; 4107 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4108 4109 if (!vm_created) { 4110 res = JNI_ERR; 4111 return res; 4112 } 4113 4114 JNIWrapper("DestroyJavaVM"); 4115 JNIEnv *env; 4116 JavaVMAttachArgs destroyargs; 4117 destroyargs.version = CurrentVersion; 4118 destroyargs.name = (char *)"DestroyJavaVM"; 4119 destroyargs.group = NULL; 4120 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4121 if (res != JNI_OK) { 4122 return res; 4123 } 4124 4125 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4126 JavaThread* thread = JavaThread::current(); 4127 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4128 if (Threads::destroy_vm()) { 4129 // Should not change thread state, VM is gone 4130 vm_created = false; 4131 res = JNI_OK; 4132 return res; 4133 } else { 4134 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4135 res = JNI_ERR; 4136 return res; 4137 } 4138 } 4139 4140 4141 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4142 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4143 4144 // Check below commented out from JDK1.2fcs as well 4145 /* 4146 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4147 return JNI_EVERSION; 4148 } 4149 */ 4150 4151 Thread* t = Thread::current_or_null(); 4152 if (t != NULL) { 4153 // If the thread has been attached this operation is a no-op 4154 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4155 return JNI_OK; 4156 } 4157 4158 // Create a thread and mark it as attaching so it will be skipped by the 4159 // ThreadsListEnumerator - see CR 6404306 4160 JavaThread* thread = new JavaThread(true); 4161 4162 // Set correct safepoint info. The thread is going to call into Java when 4163 // initializing the Java level thread object. Hence, the correct state must 4164 // be set in order for the Safepoint code to deal with it correctly. 4165 thread->set_thread_state(_thread_in_vm); 4166 thread->record_stack_base_and_size(); 4167 thread->initialize_thread_current(); 4168 4169 if (!os::create_attached_thread(thread)) { 4170 delete thread; 4171 return JNI_ERR; 4172 } 4173 // Enable stack overflow checks 4174 thread->create_stack_guard_pages(); 4175 4176 thread->initialize_tlab(); 4177 4178 thread->cache_global_variables(); 4179 4180 // Crucial that we do not have a safepoint check for this thread, since it has 4181 // not been added to the Thread list yet. 4182 { Threads_lock->lock_without_safepoint_check(); 4183 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4184 // avoid this thread trying to do a GC before it is added to the thread-list 4185 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4186 Threads::add(thread, daemon); 4187 Threads_lock->unlock(); 4188 } 4189 // Create thread group and name info from attach arguments 4190 oop group = NULL; 4191 char* thread_name = NULL; 4192 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4193 group = JNIHandles::resolve(args->group); 4194 thread_name = args->name; // may be NULL 4195 } 4196 if (group == NULL) group = Universe::main_thread_group(); 4197 4198 // Create Java level thread object and attach it to this thread 4199 bool attach_failed = false; 4200 { 4201 EXCEPTION_MARK; 4202 HandleMark hm(THREAD); 4203 Handle thread_group(THREAD, group); 4204 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4205 if (HAS_PENDING_EXCEPTION) { 4206 CLEAR_PENDING_EXCEPTION; 4207 // cleanup outside the handle mark. 4208 attach_failed = true; 4209 } 4210 } 4211 4212 if (attach_failed) { 4213 // Added missing cleanup 4214 thread->cleanup_failed_attach_current_thread(); 4215 return JNI_ERR; 4216 } 4217 4218 // mark the thread as no longer attaching 4219 // this uses a fence to push the change through so we don't have 4220 // to regrab the threads_lock 4221 thread->set_done_attaching_via_jni(); 4222 4223 // Set java thread status. 4224 java_lang_Thread::set_thread_status(thread->threadObj(), 4225 java_lang_Thread::RUNNABLE); 4226 4227 // Notify the debugger 4228 if (JvmtiExport::should_post_thread_life()) { 4229 JvmtiExport::post_thread_start(thread); 4230 } 4231 4232 EventThreadStart event; 4233 if (event.should_commit()) { 4234 event.set_thread(THREAD_TRACE_ID(thread)); 4235 event.commit(); 4236 } 4237 4238 *(JNIEnv**)penv = thread->jni_environment(); 4239 4240 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4241 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4242 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4243 // needed. 4244 4245 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4246 4247 // Perform any platform dependent FPU setup 4248 os::setup_fpu(); 4249 4250 return JNI_OK; 4251 } 4252 4253 4254 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4255 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4256 if (!vm_created) { 4257 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4258 return JNI_ERR; 4259 } 4260 4261 JNIWrapper("AttachCurrentThread"); 4262 jint ret = attach_current_thread(vm, penv, _args, false); 4263 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4264 return ret; 4265 } 4266 4267 4268 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4269 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4270 VM_Exit::block_if_vm_exited(); 4271 4272 JNIWrapper("DetachCurrentThread"); 4273 4274 // If the thread has already been detached the operation is a no-op 4275 if (Thread::current_or_null() == NULL) { 4276 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4277 return JNI_OK; 4278 } 4279 4280 JavaThread* thread = JavaThread::current(); 4281 if (thread->has_last_Java_frame()) { 4282 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4283 // Can't detach a thread that's running java, that can't work. 4284 return JNI_ERR; 4285 } 4286 4287 // Safepoint support. Have to do call-back to safepoint code, if in the 4288 // middel of a safepoint operation 4289 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4290 4291 // XXX: Note that JavaThread::exit() call below removes the guards on the 4292 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4293 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4294 // of the guards is visible in jni_AttachCurrentThread above, 4295 // the removal of the guards is buried below in JavaThread::exit() 4296 // here. The abstraction should be more symmetrically either exposed 4297 // or hidden (e.g. it could probably be hidden in the same 4298 // (platform-dependent) methods where we do alternate stack 4299 // maintenance work?) 4300 thread->exit(false, JavaThread::jni_detach); 4301 delete thread; 4302 4303 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4304 return JNI_OK; 4305 } 4306 4307 DT_RETURN_MARK_DECL(GetEnv, jint 4308 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4309 4310 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4311 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4312 jint ret = JNI_ERR; 4313 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4314 4315 if (!vm_created) { 4316 *penv = NULL; 4317 ret = JNI_EDETACHED; 4318 return ret; 4319 } 4320 4321 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4322 return ret; 4323 } 4324 4325 #ifndef JVMPI_VERSION_1 4326 // need these in order to be polite about older agents 4327 #define JVMPI_VERSION_1 ((jint)0x10000001) 4328 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4329 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4330 #endif // !JVMPI_VERSION_1 4331 4332 Thread* thread = Thread::current_or_null(); 4333 if (thread != NULL && thread->is_Java_thread()) { 4334 if (Threads::is_supported_jni_version_including_1_1(version)) { 4335 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4336 ret = JNI_OK; 4337 return ret; 4338 4339 } else if (version == JVMPI_VERSION_1 || 4340 version == JVMPI_VERSION_1_1 || 4341 version == JVMPI_VERSION_1_2) { 4342 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4343 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4344 ret = JNI_EVERSION; 4345 return ret; 4346 } else if (JvmtiExport::is_jvmdi_version(version)) { 4347 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4348 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4349 ret = JNI_EVERSION; 4350 return ret; 4351 } else { 4352 *penv = NULL; 4353 ret = JNI_EVERSION; 4354 return ret; 4355 } 4356 } else { 4357 *penv = NULL; 4358 ret = JNI_EDETACHED; 4359 return ret; 4360 } 4361 } 4362 4363 4364 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4365 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4366 if (!vm_created) { 4367 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4368 return JNI_ERR; 4369 } 4370 4371 JNIWrapper("AttachCurrentThreadAsDaemon"); 4372 jint ret = attach_current_thread(vm, penv, _args, true); 4373 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4374 return ret; 4375 } 4376 4377 4378 } // End extern "C" 4379 4380 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4381 NULL, 4382 NULL, 4383 NULL, 4384 4385 jni_DestroyJavaVM, 4386 jni_AttachCurrentThread, 4387 jni_DetachCurrentThread, 4388 jni_GetEnv, 4389 jni_AttachCurrentThreadAsDaemon 4390 };