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.inline.hpp" 32 #include "classfile/symbolTable.hpp" 33 #include "classfile/systemDictionary.hpp" 34 #include "classfile/vmSymbols.hpp" 35 #include "gc/shared/gcLocker.inline.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "memory/allocation.hpp" 38 #include "memory/allocation.inline.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/universe.inline.hpp" 41 #include "oops/instanceKlass.hpp" 42 #include "oops/instanceOop.hpp" 43 #include "oops/markOop.hpp" 44 #include "oops/method.hpp" 45 #include "oops/objArrayKlass.hpp" 46 #include "oops/objArrayOop.inline.hpp" 47 #include "oops/oop.inline.hpp" 48 #include "oops/symbol.hpp" 49 #include "oops/typeArrayKlass.hpp" 50 #include "oops/typeArrayOop.hpp" 51 #include "prims/jni.h" 52 #include "prims/jniCheck.hpp" 53 #include "prims/jniExport.hpp" 54 #include "prims/jniFastGetField.hpp" 55 #include "prims/jvm.h" 56 #include "prims/jvm_misc.hpp" 57 #include "prims/jvmtiExport.hpp" 58 #include "prims/jvmtiThreadState.hpp" 59 #include "runtime/atomic.inline.hpp" 60 #include "runtime/compilationPolicy.hpp" 61 #include "runtime/fieldDescriptor.hpp" 62 #include "runtime/fprofiler.hpp" 63 #include "runtime/handles.inline.hpp" 64 #include "runtime/interfaceSupport.hpp" 65 #include "runtime/java.hpp" 66 #include "runtime/javaCalls.hpp" 67 #include "runtime/jfieldIDWorkaround.hpp" 68 #include "runtime/orderAccess.inline.hpp" 69 #include "runtime/reflection.hpp" 70 #include "runtime/sharedRuntime.hpp" 71 #include "runtime/signature.hpp" 72 #include "runtime/thread.inline.hpp" 73 #include "runtime/vm_operations.hpp" 74 #include "services/memTracker.hpp" 75 #include "services/runtimeService.hpp" 76 #include "trace/tracing.hpp" 77 #include "utilities/defaultStream.hpp" 78 #include "utilities/dtrace.hpp" 79 #include "utilities/events.hpp" 80 #include "utilities/histogram.hpp" 81 #include "utilities/internalVMTests.hpp" 82 #include "utilities/macros.hpp" 83 #if INCLUDE_ALL_GCS 84 #include "gc/g1/g1SATBCardTableModRefBS.hpp" 85 #endif // INCLUDE_ALL_GCS 86 #if INCLUDE_JVMCI 87 #include "jvmci/jvmciCompiler.hpp" 88 #include "jvmci/jvmciRuntime.hpp" 89 #endif 90 91 static jint CurrentVersion = JNI_VERSION_1_8; 92 93 #ifdef _WIN32 94 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 95 #endif 96 97 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 98 // '-return' probe regardless of the return path is taken out of the function. 99 // Methods that have multiple return paths use this to avoid having to 100 // instrument each return path. Methods that use CHECK or THROW must use this 101 // since those macros can cause an immedate uninstrumented return. 102 // 103 // In order to get the return value, a reference to the variable containing 104 // the return value must be passed to the contructor of the object, and 105 // the return value must be set before return (since the mark object has 106 // a reference to it). 107 // 108 // Example: 109 // DT_RETURN_MARK_DECL(SomeFunc, int); 110 // JNI_ENTRY(int, SomeFunc, ...) 111 // int return_value = 0; 112 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 113 // foo(CHECK_0) 114 // return_value = 5; 115 // return return_value; 116 // JNI_END 117 #define DT_RETURN_MARK_DECL(name, type, probe) \ 118 DTRACE_ONLY( \ 119 class DTraceReturnProbeMark_##name { \ 120 public: \ 121 const type& _ret_ref; \ 122 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 123 ~DTraceReturnProbeMark_##name() { \ 124 probe; \ 125 } \ 126 } \ 127 ) 128 // Void functions are simpler since there's no return value 129 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 130 DTRACE_ONLY( \ 131 class DTraceReturnProbeMark_##name { \ 132 public: \ 133 ~DTraceReturnProbeMark_##name() { \ 134 probe; \ 135 } \ 136 } \ 137 ) 138 139 // Place these macros in the function to mark the return. Non-void 140 // functions need the type and address of the return value. 141 #define DT_RETURN_MARK(name, type, ref) \ 142 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 143 #define DT_VOID_RETURN_MARK(name) \ 144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 145 146 147 // Use these to select distinct code for floating-point vs. non-floating point 148 // situations. Used from within common macros where we need slightly 149 // different behavior for Float/Double 150 #define FP_SELECT_Boolean(intcode, fpcode) intcode 151 #define FP_SELECT_Byte(intcode, fpcode) intcode 152 #define FP_SELECT_Char(intcode, fpcode) intcode 153 #define FP_SELECT_Short(intcode, fpcode) intcode 154 #define FP_SELECT_Object(intcode, fpcode) intcode 155 #define FP_SELECT_Int(intcode, fpcode) intcode 156 #define FP_SELECT_Long(intcode, fpcode) intcode 157 #define FP_SELECT_Float(intcode, fpcode) fpcode 158 #define FP_SELECT_Double(intcode, fpcode) fpcode 159 #define FP_SELECT(TypeName, intcode, fpcode) \ 160 FP_SELECT_##TypeName(intcode, fpcode) 161 162 #define COMMA , 163 164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 165 // (dtrace doesn't do FP yet) 166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 167 FP_SELECT(TypeName, \ 168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 170 FP_SELECT(TypeName, \ 171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 172 173 174 // out-of-line helpers for class jfieldIDWorkaround: 175 176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 178 uintptr_t as_uint = (uintptr_t) id; 179 intptr_t offset = raw_instance_offset(id); 180 if (is_checked_jfieldID(id)) { 181 if (!klass_hash_ok(k, id)) { 182 return false; 183 } 184 } 185 return InstanceKlass::cast(k)->contains_field_offset(offset); 186 } else { 187 JNIid* result = (JNIid*) id; 188 #ifdef ASSERT 189 return result != NULL && result->is_static_field_id(); 190 #else 191 return result != NULL; 192 #endif 193 } 194 } 195 196 197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 198 if (offset <= small_offset_mask) { 199 Klass* field_klass = k; 200 Klass* super_klass = field_klass->super(); 201 // With compressed oops the most super class with nonstatic fields would 202 // be the owner of fields embedded in the header. 203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 205 field_klass = super_klass; // super contains the field also 206 super_klass = field_klass->super(); 207 } 208 debug_only(NoSafepointVerifier nosafepoint;) 209 uintptr_t klass_hash = field_klass->identity_hash(); 210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 211 } else { 212 #if 0 213 #ifndef PRODUCT 214 { 215 ResourceMark rm; 216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 217 } 218 #endif 219 #endif 220 return 0; 221 } 222 } 223 224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 225 uintptr_t as_uint = (uintptr_t) id; 226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 227 do { 228 debug_only(NoSafepointVerifier nosafepoint;) 229 // Could use a non-blocking query for identity_hash here... 230 if ((k->identity_hash() & klass_mask) == klass_hash) 231 return true; 232 k = k->super(); 233 } while (k != NULL); 234 return false; 235 } 236 237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 239 uintptr_t as_uint = (uintptr_t) id; 240 intptr_t offset = raw_instance_offset(id); 241 if (VerifyJNIFields) { 242 if (is_checked_jfieldID(id)) { 243 guarantee(klass_hash_ok(k, id), 244 "Bug in native code: jfieldID class must match object"); 245 } else { 246 #if 0 247 #ifndef PRODUCT 248 if (Verbose) { 249 ResourceMark rm; 250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 251 } 252 #endif 253 #endif 254 } 255 } 256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 257 "Bug in native code: jfieldID offset must address interior of object"); 258 } 259 260 // Wrapper to trace JNI functions 261 262 #ifdef ASSERT 263 Histogram* JNIHistogram; 264 static volatile jint JNIHistogram_lock = 0; 265 266 class JNIHistogramElement : public HistogramElement { 267 public: 268 JNIHistogramElement(const char* name); 269 }; 270 271 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 272 _name = elementName; 273 uintx count = 0; 274 275 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 276 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 277 count +=1; 278 if ( (WarnOnStalledSpinLock > 0) 279 && (count % WarnOnStalledSpinLock == 0)) { 280 warning("JNIHistogram_lock seems to be stalled"); 281 } 282 } 283 } 284 285 286 if(JNIHistogram == NULL) 287 JNIHistogram = new Histogram("JNI Call Counts",100); 288 289 JNIHistogram->add_element(this); 290 Atomic::dec(&JNIHistogram_lock); 291 } 292 293 #define JNICountWrapper(arg) \ 294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 296 if (e != NULL) e->increment_count() 297 #define JNIWrapper(arg) JNICountWrapper(arg); 298 #else 299 #define JNIWrapper(arg) 300 #endif 301 302 303 // Implementation of JNI entries 304 305 DT_RETURN_MARK_DECL(DefineClass, jclass 306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 307 308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 309 const jbyte *buf, jsize bufLen)) 310 JNIWrapper("DefineClass"); 311 312 HOTSPOT_JNI_DEFINECLASS_ENTRY( 313 env, (char*) name, loaderRef, (char*) buf, bufLen); 314 315 jclass cls = NULL; 316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 317 318 TempNewSymbol class_name = NULL; 319 // Since exceptions can be thrown, class initialization can take place 320 // if name is NULL no check for class name in .class stream has to be made. 321 if (name != NULL) { 322 const int str_len = (int)strlen(name); 323 if (str_len > Symbol::max_length()) { 324 // It's impossible to create this class; the name cannot fit 325 // into the constant pool. 326 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 327 } 328 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 329 } 330 ResourceMark rm(THREAD); 331 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 332 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 333 334 if (UsePerfData && !class_loader.is_null()) { 335 // check whether the current caller thread holds the lock or not. 336 // If not, increment the corresponding counter 337 if (ObjectSynchronizer:: 338 query_lock_ownership((JavaThread*)THREAD, class_loader) != 339 ObjectSynchronizer::owner_self) { 340 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 341 } 342 } 343 Klass* k = SystemDictionary::resolve_from_stream(class_name, 344 class_loader, 345 Handle(), 346 &st, 347 CHECK_NULL); 348 349 if (log_is_enabled(Info, classresolve) && k != NULL) { 350 trace_class_resolution(k); 351 } 352 353 cls = (jclass)JNIHandles::make_local( 354 env, k->java_mirror()); 355 return cls; 356 JNI_END 357 358 359 360 static bool first_time_FindClass = true; 361 362 DT_RETURN_MARK_DECL(FindClass, jclass 363 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 364 365 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 366 JNIWrapper("FindClass"); 367 368 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 369 370 jclass result = NULL; 371 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 372 373 // Remember if we are the first invocation of jni_FindClass 374 bool first_time = first_time_FindClass; 375 first_time_FindClass = false; 376 377 // Sanity check the name: it cannot be null or larger than the maximum size 378 // name we can fit in the constant pool. 379 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 380 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 381 } 382 383 //%note jni_3 384 Handle loader; 385 Handle protection_domain; 386 // Find calling class 387 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 388 if (k.not_null()) { 389 loader = Handle(THREAD, k->class_loader()); 390 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 391 // in the correct class context. 392 if (loader.is_null() && 393 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 394 JavaValue result(T_OBJECT); 395 JavaCalls::call_static(&result, k, 396 vmSymbols::getFromClass_name(), 397 vmSymbols::void_class_signature(), 398 thread); 399 if (HAS_PENDING_EXCEPTION) { 400 Handle ex(thread, thread->pending_exception()); 401 CLEAR_PENDING_EXCEPTION; 402 THROW_HANDLE_0(ex); 403 } 404 oop mirror = (oop) result.get_jobject(); 405 loader = Handle(THREAD, 406 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 407 protection_domain = Handle(THREAD, 408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 409 } 410 } else { 411 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 412 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 413 } 414 415 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 416 result = find_class_from_class_loader(env, sym, true, loader, 417 protection_domain, true, thread); 418 419 if (log_is_enabled(Info, classresolve) && result != NULL) { 420 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 421 } 422 423 // If we were the first invocation of jni_FindClass, we enable compilation again 424 // rather than just allowing invocation counter to overflow and decay. 425 // Controlled by flag DelayCompilationDuringStartup. 426 if (first_time && !CompileTheWorld) 427 CompilationPolicy::completed_vm_startup(); 428 429 return result; 430 JNI_END 431 432 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 433 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 434 435 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 436 JNIWrapper("FromReflectedMethod"); 437 438 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 439 440 jmethodID ret = NULL; 441 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 442 443 // method is a handle to a java.lang.reflect.Method object 444 oop reflected = JNIHandles::resolve_non_null(method); 445 oop mirror = NULL; 446 int slot = 0; 447 448 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 449 mirror = java_lang_reflect_Constructor::clazz(reflected); 450 slot = java_lang_reflect_Constructor::slot(reflected); 451 } else { 452 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 453 mirror = java_lang_reflect_Method::clazz(reflected); 454 slot = java_lang_reflect_Method::slot(reflected); 455 } 456 Klass* k = java_lang_Class::as_Klass(mirror); 457 458 KlassHandle k1(THREAD, k); 459 // Make sure class is initialized before handing id's out to methods 460 k1()->initialize(CHECK_NULL); 461 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 462 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 463 return ret; 464 JNI_END 465 466 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 467 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 468 469 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 470 JNIWrapper("FromReflectedField"); 471 472 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 473 474 jfieldID ret = NULL; 475 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 476 477 // field is a handle to a java.lang.reflect.Field object 478 oop reflected = JNIHandles::resolve_non_null(field); 479 oop mirror = java_lang_reflect_Field::clazz(reflected); 480 Klass* k = java_lang_Class::as_Klass(mirror); 481 int slot = java_lang_reflect_Field::slot(reflected); 482 int modifiers = java_lang_reflect_Field::modifiers(reflected); 483 484 KlassHandle k1(THREAD, k); 485 // Make sure class is initialized before handing id's out to fields 486 k1()->initialize(CHECK_NULL); 487 488 // First check if this is a static field 489 if (modifiers & JVM_ACC_STATIC) { 490 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 491 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 492 assert(id != NULL, "corrupt Field object"); 493 debug_only(id->set_is_static_field_id();) 494 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 495 ret = jfieldIDWorkaround::to_static_jfieldID(id); 496 return ret; 497 } 498 499 // The slot is the index of the field description in the field-array 500 // The jfieldID is the offset of the field within the object 501 // It may also have hash bits for k, if VerifyJNIFields is turned on. 502 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 503 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 504 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 505 return ret; 506 JNI_END 507 508 509 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 510 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 511 512 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 513 JNIWrapper("ToReflectedMethod"); 514 515 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 516 517 jobject ret = NULL; 518 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 519 520 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 521 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 522 oop reflection_method; 523 if (m->is_initializer()) { 524 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 525 } else { 526 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 527 } 528 ret = JNIHandles::make_local(env, reflection_method); 529 return ret; 530 JNI_END 531 532 DT_RETURN_MARK_DECL(GetSuperclass, jclass 533 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 534 535 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 536 JNIWrapper("GetSuperclass"); 537 538 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 539 540 jclass obj = NULL; 541 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 542 543 oop mirror = JNIHandles::resolve_non_null(sub); 544 // primitive classes return NULL 545 if (java_lang_Class::is_primitive(mirror)) return NULL; 546 547 // Rules of Class.getSuperClass as implemented by KLass::java_super: 548 // arrays return Object 549 // interfaces return NULL 550 // proper classes return Klass::super() 551 Klass* k = java_lang_Class::as_Klass(mirror); 552 if (k->is_interface()) return NULL; 553 554 // return mirror for superclass 555 Klass* super = k->java_super(); 556 // super2 is the value computed by the compiler's getSuperClass intrinsic: 557 debug_only(Klass* super2 = ( k->is_array_klass() 558 ? SystemDictionary::Object_klass() 559 : k->super() ) ); 560 assert(super == super2, 561 "java_super computation depends on interface, array, other super"); 562 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 563 return obj; 564 JNI_END 565 566 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 567 JNIWrapper("IsSubclassOf"); 568 569 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 570 571 oop sub_mirror = JNIHandles::resolve_non_null(sub); 572 oop super_mirror = JNIHandles::resolve_non_null(super); 573 if (java_lang_Class::is_primitive(sub_mirror) || 574 java_lang_Class::is_primitive(super_mirror)) { 575 jboolean ret = (sub_mirror == super_mirror); 576 577 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 578 return ret; 579 } 580 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 581 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 582 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 583 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 584 JNI_TRUE : JNI_FALSE; 585 586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 587 return ret; 588 JNI_END 589 590 591 DT_RETURN_MARK_DECL(Throw, jint 592 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 593 594 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 595 JNIWrapper("Throw"); 596 597 HOTSPOT_JNI_THROW_ENTRY(env, obj); 598 599 jint ret = JNI_OK; 600 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 601 602 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 603 ShouldNotReachHere(); 604 return 0; // Mute compiler. 605 JNI_END 606 607 608 DT_RETURN_MARK_DECL(ThrowNew, jint 609 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 610 611 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 612 JNIWrapper("ThrowNew"); 613 614 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 615 616 jint ret = JNI_OK; 617 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 618 619 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 620 Symbol* name = k->name(); 621 Handle class_loader (THREAD, k->class_loader()); 622 Handle protection_domain (THREAD, k->protection_domain()); 623 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 624 ShouldNotReachHere(); 625 return 0; // Mute compiler. 626 JNI_END 627 628 629 // JNI functions only transform a pending async exception to a synchronous 630 // exception in ExceptionOccurred and ExceptionCheck calls, since 631 // delivering an async exception in other places won't change the native 632 // code's control flow and would be harmful when native code further calls 633 // JNI functions with a pending exception. Async exception is also checked 634 // during the call, so ExceptionOccurred/ExceptionCheck won't return 635 // false but deliver the async exception at the very end during 636 // state transition. 637 638 static void jni_check_async_exceptions(JavaThread *thread) { 639 assert(thread == Thread::current(), "must be itself"); 640 thread->check_and_handle_async_exceptions(); 641 } 642 643 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 644 JNIWrapper("ExceptionOccurred"); 645 646 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 647 648 jni_check_async_exceptions(thread); 649 oop exception = thread->pending_exception(); 650 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 651 652 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 653 return ret; 654 JNI_END 655 656 657 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 658 JNIWrapper("ExceptionDescribe"); 659 660 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 661 662 if (thread->has_pending_exception()) { 663 Handle ex(thread, thread->pending_exception()); 664 thread->clear_pending_exception(); 665 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 666 // Don't print anything if we are being killed. 667 } else { 668 jio_fprintf(defaultStream::error_stream(), "Exception "); 669 if (thread != NULL && thread->threadObj() != NULL) { 670 ResourceMark rm(THREAD); 671 jio_fprintf(defaultStream::error_stream(), 672 "in thread \"%s\" ", thread->get_thread_name()); 673 } 674 if (ex->is_a(SystemDictionary::Throwable_klass())) { 675 JavaValue result(T_VOID); 676 JavaCalls::call_virtual(&result, 677 ex, 678 KlassHandle(THREAD, 679 SystemDictionary::Throwable_klass()), 680 vmSymbols::printStackTrace_name(), 681 vmSymbols::void_method_signature(), 682 THREAD); 683 // If an exception is thrown in the call it gets thrown away. Not much 684 // we can do with it. The native code that calls this, does not check 685 // for the exception - hence, it might still be in the thread when DestroyVM gets 686 // called, potentially causing a few asserts to trigger - since no pending exception 687 // is expected. 688 CLEAR_PENDING_EXCEPTION; 689 } else { 690 ResourceMark rm(THREAD); 691 jio_fprintf(defaultStream::error_stream(), 692 ". Uncaught exception of type %s.", 693 ex->klass()->external_name()); 694 } 695 } 696 } 697 698 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 699 JNI_END 700 701 702 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 703 JNIWrapper("ExceptionClear"); 704 705 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 706 707 // The jni code might be using this API to clear java thrown exception. 708 // So just mark jvmti thread exception state as exception caught. 709 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 710 if (state != NULL && state->is_exception_detected()) { 711 state->set_exception_caught(); 712 } 713 thread->clear_pending_exception(); 714 715 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 716 JNI_END 717 718 719 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 720 JNIWrapper("FatalError"); 721 722 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 723 724 tty->print_cr("FATAL ERROR in native method: %s", msg); 725 thread->print_stack(); 726 os::abort(); // Dump core and abort 727 JNI_END 728 729 730 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 731 JNIWrapper("PushLocalFrame"); 732 733 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 734 735 //%note jni_11 736 if (capacity < 0 || 737 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 738 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 739 return JNI_ERR; 740 } 741 JNIHandleBlock* old_handles = thread->active_handles(); 742 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 743 assert(new_handles != NULL, "should not be NULL"); 744 new_handles->set_pop_frame_link(old_handles); 745 thread->set_active_handles(new_handles); 746 jint ret = JNI_OK; 747 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 748 return ret; 749 JNI_END 750 751 752 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 753 JNIWrapper("PopLocalFrame"); 754 755 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 756 757 //%note jni_11 758 Handle result_handle(thread, JNIHandles::resolve(result)); 759 JNIHandleBlock* old_handles = thread->active_handles(); 760 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 761 if (new_handles != NULL) { 762 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 763 // This way code will still work if PopLocalFrame is called without a corresponding 764 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 765 // the release_block call will release the blocks. 766 thread->set_active_handles(new_handles); 767 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 768 JNIHandleBlock::release_block(old_handles, thread); // may block 769 result = JNIHandles::make_local(thread, result_handle()); 770 } 771 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 772 return result; 773 JNI_END 774 775 776 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 777 JNIWrapper("NewGlobalRef"); 778 779 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 780 781 Handle ref_handle(thread, JNIHandles::resolve(ref)); 782 jobject ret = JNIHandles::make_global(ref_handle); 783 784 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 785 return ret; 786 JNI_END 787 788 // Must be JNI_ENTRY (with HandleMark) 789 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 790 JNIWrapper("DeleteGlobalRef"); 791 792 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 793 794 JNIHandles::destroy_global(ref); 795 796 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 797 JNI_END 798 799 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 800 JNIWrapper("DeleteLocalRef"); 801 802 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 803 804 JNIHandles::destroy_local(obj); 805 806 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 807 JNI_END 808 809 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 810 JNIWrapper("IsSameObject"); 811 812 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 813 814 oop a = JNIHandles::resolve(r1); 815 oop b = JNIHandles::resolve(r2); 816 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 817 818 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 819 return ret; 820 JNI_END 821 822 823 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 824 JNIWrapper("NewLocalRef"); 825 826 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 827 828 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 829 830 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 831 return ret; 832 JNI_END 833 834 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 835 JNIWrapper("EnsureLocalCapacity"); 836 837 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 838 839 jint ret; 840 if (capacity >= 0 && 841 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 842 ret = JNI_OK; 843 } else { 844 ret = JNI_ERR; 845 } 846 847 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 848 return ret; 849 JNI_END 850 851 // Return the Handle Type 852 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 853 JNIWrapper("GetObjectRefType"); 854 855 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 856 857 jobjectRefType ret; 858 if (JNIHandles::is_local_handle(thread, obj) || 859 JNIHandles::is_frame_handle(thread, obj)) 860 ret = JNILocalRefType; 861 else if (JNIHandles::is_global_handle(obj)) 862 ret = JNIGlobalRefType; 863 else if (JNIHandles::is_weak_global_handle(obj)) 864 ret = JNIWeakGlobalRefType; 865 else 866 ret = JNIInvalidRefType; 867 868 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 869 return ret; 870 JNI_END 871 872 873 class JNI_ArgumentPusher : public SignatureIterator { 874 protected: 875 JavaCallArguments* _arguments; 876 877 virtual void get_bool () = 0; 878 virtual void get_char () = 0; 879 virtual void get_short () = 0; 880 virtual void get_byte () = 0; 881 virtual void get_int () = 0; 882 virtual void get_long () = 0; 883 virtual void get_float () = 0; 884 virtual void get_double () = 0; 885 virtual void get_object () = 0; 886 887 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 888 this->_return_type = T_ILLEGAL; 889 _arguments = NULL; 890 } 891 892 public: 893 virtual void iterate( uint64_t fingerprint ) = 0; 894 895 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 896 897 inline void do_bool() { if (!is_return_type()) get_bool(); } 898 inline void do_char() { if (!is_return_type()) get_char(); } 899 inline void do_short() { if (!is_return_type()) get_short(); } 900 inline void do_byte() { if (!is_return_type()) get_byte(); } 901 inline void do_int() { if (!is_return_type()) get_int(); } 902 inline void do_long() { if (!is_return_type()) get_long(); } 903 inline void do_float() { if (!is_return_type()) get_float(); } 904 inline void do_double() { if (!is_return_type()) get_double(); } 905 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 906 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 907 inline void do_void() { } 908 909 JavaCallArguments* arguments() { return _arguments; } 910 void push_receiver(Handle h) { _arguments->push_oop(h); } 911 }; 912 913 914 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 915 protected: 916 va_list _ap; 917 918 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 919 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 920 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 921 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 922 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 923 924 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 925 926 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 927 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 928 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 929 inline void get_object() { jobject l = va_arg(_ap, jobject); 930 _arguments->push_oop(Handle((oop *)l, false)); } 931 932 inline void set_ap(va_list rap) { 933 #ifdef va_copy 934 va_copy(_ap, rap); 935 #elif defined (__va_copy) 936 __va_copy(_ap, rap); 937 #else 938 _ap = rap; 939 #endif 940 } 941 942 public: 943 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 944 : JNI_ArgumentPusher(signature) { 945 set_ap(rap); 946 } 947 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 948 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 949 set_ap(rap); 950 } 951 952 // Optimized path if we have the bitvector form of signature 953 void iterate( uint64_t fingerprint ) { 954 if (fingerprint == (uint64_t)CONST64(-1)) { 955 SignatureIterator::iterate(); // Must be too many arguments 956 } else { 957 _return_type = (BasicType)((fingerprint >> static_feature_size) & 958 result_feature_mask); 959 960 assert(fingerprint, "Fingerprint should not be 0"); 961 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 962 while ( 1 ) { 963 switch ( fingerprint & parameter_feature_mask ) { 964 case bool_parm: 965 case char_parm: 966 case short_parm: 967 case byte_parm: 968 case int_parm: 969 get_int(); 970 break; 971 case obj_parm: 972 get_object(); 973 break; 974 case long_parm: 975 get_long(); 976 break; 977 case float_parm: 978 get_float(); 979 break; 980 case double_parm: 981 get_double(); 982 break; 983 case done_parm: 984 return; 985 break; 986 default: 987 ShouldNotReachHere(); 988 break; 989 } 990 fingerprint >>= parameter_feature_size; 991 } 992 } 993 } 994 }; 995 996 997 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 998 protected: 999 const jvalue *_ap; 1000 1001 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 1002 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1003 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1004 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1005 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1006 1007 inline void get_long() { _arguments->push_long((_ap++)->j); } 1008 inline void get_float() { _arguments->push_float((_ap++)->f); } 1009 inline void get_double() { _arguments->push_double((_ap++)->d);} 1010 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1011 1012 inline void set_ap(const jvalue *rap) { _ap = rap; } 1013 1014 public: 1015 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1016 : JNI_ArgumentPusher(signature) { 1017 set_ap(rap); 1018 } 1019 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1020 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1021 set_ap(rap); 1022 } 1023 1024 // Optimized path if we have the bitvector form of signature 1025 void iterate( uint64_t fingerprint ) { 1026 if (fingerprint == (uint64_t)CONST64(-1)) { 1027 SignatureIterator::iterate(); // Must be too many arguments 1028 } else { 1029 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1030 result_feature_mask); 1031 assert(fingerprint, "Fingerprint should not be 0"); 1032 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1033 while ( 1 ) { 1034 switch ( fingerprint & parameter_feature_mask ) { 1035 case bool_parm: 1036 get_bool(); 1037 break; 1038 case char_parm: 1039 get_char(); 1040 break; 1041 case short_parm: 1042 get_short(); 1043 break; 1044 case byte_parm: 1045 get_byte(); 1046 break; 1047 case int_parm: 1048 get_int(); 1049 break; 1050 case obj_parm: 1051 get_object(); 1052 break; 1053 case long_parm: 1054 get_long(); 1055 break; 1056 case float_parm: 1057 get_float(); 1058 break; 1059 case double_parm: 1060 get_double(); 1061 break; 1062 case done_parm: 1063 return; 1064 break; 1065 default: 1066 ShouldNotReachHere(); 1067 break; 1068 } 1069 fingerprint >>= parameter_feature_size; 1070 } 1071 } 1072 } 1073 }; 1074 1075 1076 enum JNICallType { 1077 JNI_STATIC, 1078 JNI_VIRTUAL, 1079 JNI_NONVIRTUAL 1080 }; 1081 1082 1083 1084 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1085 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1086 1087 // Create object to hold arguments for the JavaCall, and associate it with 1088 // the jni parser 1089 ResourceMark rm(THREAD); 1090 int number_of_parameters = method->size_of_parameters(); 1091 JavaCallArguments java_args(number_of_parameters); 1092 args->set_java_argument_object(&java_args); 1093 1094 assert(method->is_static(), "method should be static"); 1095 1096 // Fill out JavaCallArguments object 1097 args->iterate( Fingerprinter(method).fingerprint() ); 1098 // Initialize result type 1099 result->set_type(args->get_ret_type()); 1100 1101 // Invoke the method. Result is returned as oop. 1102 JavaCalls::call(result, method, &java_args, CHECK); 1103 1104 // Convert result 1105 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1106 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1107 } 1108 } 1109 1110 1111 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1112 oop recv = JNIHandles::resolve(receiver); 1113 if (recv == NULL) { 1114 THROW(vmSymbols::java_lang_NullPointerException()); 1115 } 1116 Handle h_recv(THREAD, recv); 1117 1118 int number_of_parameters; 1119 Method* selected_method; 1120 { 1121 Method* m = Method::resolve_jmethod_id(method_id); 1122 number_of_parameters = m->size_of_parameters(); 1123 Klass* holder = m->method_holder(); 1124 if (call_type != JNI_VIRTUAL) { 1125 selected_method = m; 1126 } else if (!m->has_itable_index()) { 1127 // non-interface call -- for that little speed boost, don't handlize 1128 debug_only(NoSafepointVerifier nosafepoint;) 1129 // jni_GetMethodID makes sure class is linked and initialized 1130 // so m should have a valid vtable index. 1131 assert(m->valid_vtable_index(), "no valid vtable index"); 1132 int vtbl_index = m->vtable_index(); 1133 if (vtbl_index != Method::nonvirtual_vtable_index) { 1134 Klass* k = h_recv->klass(); 1135 // k might be an arrayKlassOop but all vtables start at 1136 // the same place. The cast is to avoid virtual call and assertion. 1137 InstanceKlass *ik = (InstanceKlass*)k; 1138 selected_method = ik->method_at_vtable(vtbl_index); 1139 } else { 1140 // final method 1141 selected_method = m; 1142 } 1143 } else { 1144 // interface call 1145 KlassHandle h_holder(THREAD, holder); 1146 1147 int itbl_index = m->itable_index(); 1148 Klass* k = h_recv->klass(); 1149 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1150 } 1151 } 1152 1153 methodHandle method(THREAD, selected_method); 1154 1155 // Create object to hold arguments for the JavaCall, and associate it with 1156 // the jni parser 1157 ResourceMark rm(THREAD); 1158 JavaCallArguments java_args(number_of_parameters); 1159 args->set_java_argument_object(&java_args); 1160 1161 // handle arguments 1162 assert(!method->is_static(), "method should not be static"); 1163 args->push_receiver(h_recv); // Push jobject handle 1164 1165 // Fill out JavaCallArguments object 1166 args->iterate( Fingerprinter(method).fingerprint() ); 1167 // Initialize result type 1168 result->set_type(args->get_ret_type()); 1169 1170 // Invoke the method. Result is returned as oop. 1171 JavaCalls::call(result, method, &java_args, CHECK); 1172 1173 // Convert result 1174 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1175 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1176 } 1177 } 1178 1179 1180 static instanceOop alloc_object(jclass clazz, TRAPS) { 1181 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1182 if (k == NULL) { 1183 ResourceMark rm(THREAD); 1184 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1185 } 1186 k()->check_valid_for_instantiation(false, CHECK_NULL); 1187 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1188 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1189 return ih; 1190 } 1191 1192 DT_RETURN_MARK_DECL(AllocObject, jobject 1193 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1194 1195 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1196 JNIWrapper("AllocObject"); 1197 1198 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1199 1200 jobject ret = NULL; 1201 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1202 1203 instanceOop i = alloc_object(clazz, CHECK_NULL); 1204 ret = JNIHandles::make_local(env, i); 1205 return ret; 1206 JNI_END 1207 1208 DT_RETURN_MARK_DECL(NewObjectA, jobject 1209 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1210 1211 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1212 JNIWrapper("NewObjectA"); 1213 1214 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1215 1216 jobject obj = NULL; 1217 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1218 1219 instanceOop i = alloc_object(clazz, CHECK_NULL); 1220 obj = JNIHandles::make_local(env, i); 1221 JavaValue jvalue(T_VOID); 1222 JNI_ArgumentPusherArray ap(methodID, args); 1223 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1224 return obj; 1225 JNI_END 1226 1227 1228 DT_RETURN_MARK_DECL(NewObjectV, jobject 1229 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1230 1231 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1232 JNIWrapper("NewObjectV"); 1233 1234 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1235 1236 jobject obj = NULL; 1237 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1238 1239 instanceOop i = alloc_object(clazz, CHECK_NULL); 1240 obj = JNIHandles::make_local(env, i); 1241 JavaValue jvalue(T_VOID); 1242 JNI_ArgumentPusherVaArg ap(methodID, args); 1243 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1244 return obj; 1245 JNI_END 1246 1247 1248 DT_RETURN_MARK_DECL(NewObject, jobject 1249 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1250 1251 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1252 JNIWrapper("NewObject"); 1253 1254 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1255 1256 jobject obj = NULL; 1257 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1258 1259 instanceOop i = alloc_object(clazz, CHECK_NULL); 1260 obj = JNIHandles::make_local(env, i); 1261 va_list args; 1262 va_start(args, methodID); 1263 JavaValue jvalue(T_VOID); 1264 JNI_ArgumentPusherVaArg ap(methodID, args); 1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1266 va_end(args); 1267 return obj; 1268 JNI_END 1269 1270 1271 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1272 JNIWrapper("GetObjectClass"); 1273 1274 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1275 1276 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1277 jclass ret = 1278 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1279 1280 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1281 return ret; 1282 JNI_END 1283 1284 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1285 JNIWrapper("IsInstanceOf"); 1286 1287 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1288 1289 jboolean ret = JNI_TRUE; 1290 if (obj != NULL) { 1291 ret = JNI_FALSE; 1292 Klass* k = java_lang_Class::as_Klass( 1293 JNIHandles::resolve_non_null(clazz)); 1294 if (k != NULL) { 1295 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1296 } 1297 } 1298 1299 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1300 return ret; 1301 JNI_END 1302 1303 1304 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1305 const char *sig, bool is_static, TRAPS) { 1306 // %%%% This code should probably just call into a method in the LinkResolver 1307 // 1308 // The class should have been loaded (we have an instance of the class 1309 // passed in) so the method and signature should already be in the symbol 1310 // table. If they're not there, the method doesn't exist. 1311 const char *name_to_probe = (name_str == NULL) 1312 ? vmSymbols::object_initializer_name()->as_C_string() 1313 : name_str; 1314 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1315 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1316 1317 if (name == NULL || signature == NULL) { 1318 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1319 } 1320 1321 // Throw a NoSuchMethodError exception if we have an instance of a 1322 // primitive java.lang.Class 1323 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1324 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1325 } 1326 1327 KlassHandle klass(THREAD, 1328 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1329 1330 // Make sure class is linked and initialized before handing id's out to 1331 // Method*s. 1332 klass()->initialize(CHECK_NULL); 1333 1334 Method* m; 1335 if (name == vmSymbols::object_initializer_name() || 1336 name == vmSymbols::class_initializer_name()) { 1337 // Never search superclasses for constructors 1338 if (klass->is_instance_klass()) { 1339 m = InstanceKlass::cast(klass())->find_method(name, signature); 1340 } else { 1341 m = NULL; 1342 } 1343 } else { 1344 m = klass->lookup_method(name, signature); 1345 if (m == NULL && klass->is_instance_klass()) { 1346 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1347 } 1348 } 1349 if (m == NULL || (m->is_static() != is_static)) { 1350 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1351 } 1352 return m->jmethod_id(); 1353 } 1354 1355 1356 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1357 const char *name, const char *sig)) 1358 JNIWrapper("GetMethodID"); 1359 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1360 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1361 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1362 return ret; 1363 JNI_END 1364 1365 1366 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1367 const char *name, const char *sig)) 1368 JNIWrapper("GetStaticMethodID"); 1369 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1370 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1371 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1372 return ret; 1373 JNI_END 1374 1375 1376 1377 // 1378 // Calling Methods 1379 // 1380 1381 1382 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1383 , EntryProbe, ReturnProbe) \ 1384 \ 1385 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1386 , ReturnProbe); \ 1387 \ 1388 JNI_ENTRY(ResultType, \ 1389 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1390 JNIWrapper("Call" XSTR(Result) "Method"); \ 1391 \ 1392 EntryProbe; \ 1393 ResultType ret = 0;\ 1394 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1395 (const ResultType&)ret);\ 1396 \ 1397 va_list args; \ 1398 va_start(args, methodID); \ 1399 JavaValue jvalue(Tag); \ 1400 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1401 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1402 va_end(args); \ 1403 ret = jvalue.get_##ResultType(); \ 1404 return ret;\ 1405 JNI_END 1406 1407 // the runtime type of subword integral basic types is integer 1408 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1409 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1410 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1411 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1412 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1413 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1414 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1415 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1416 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1417 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1418 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1419 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1420 1421 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1422 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1423 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1424 DEFINE_CALLMETHOD(jint, Int, T_INT, 1425 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1426 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1427 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1428 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1429 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1430 // Float and double probes don't return value because dtrace doesn't currently support it 1431 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1432 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1434 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1435 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1436 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1437 1438 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1439 , EntryProbe, ReturnProbe) \ 1440 \ 1441 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1442 , ReturnProbe); \ 1443 \ 1444 JNI_ENTRY(ResultType, \ 1445 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1446 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1447 \ 1448 EntryProbe;\ 1449 ResultType ret = 0;\ 1450 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1451 (const ResultType&)ret);\ 1452 \ 1453 JavaValue jvalue(Tag); \ 1454 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1455 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1456 ret = jvalue.get_##ResultType(); \ 1457 return ret;\ 1458 JNI_END 1459 1460 // the runtime type of subword integral basic types is integer 1461 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1462 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1463 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1464 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1465 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1466 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1467 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1468 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1469 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1470 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1471 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1472 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1473 1474 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1475 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1477 DEFINE_CALLMETHODV(jint, Int, T_INT, 1478 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1480 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1481 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1482 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1483 // Float and double probes don't return value because dtrace doesn't currently support it 1484 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1485 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1487 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1488 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1489 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1490 1491 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1492 , EntryProbe, ReturnProbe) \ 1493 \ 1494 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1495 , ReturnProbe); \ 1496 \ 1497 JNI_ENTRY(ResultType, \ 1498 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1499 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1500 EntryProbe; \ 1501 ResultType ret = 0;\ 1502 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1503 (const ResultType&)ret);\ 1504 \ 1505 JavaValue jvalue(Tag); \ 1506 JNI_ArgumentPusherArray ap(methodID, args); \ 1507 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1508 ret = jvalue.get_##ResultType(); \ 1509 return ret;\ 1510 JNI_END 1511 1512 // the runtime type of subword integral basic types is integer 1513 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1514 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1515 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1516 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1517 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1518 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1519 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1520 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1521 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1522 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1523 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1524 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1525 1526 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1527 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1529 DEFINE_CALLMETHODA(jint, Int, T_INT, 1530 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1531 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1532 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1533 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1534 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1535 // Float and double probes don't return value because dtrace doesn't currently support it 1536 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1537 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1539 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1540 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1541 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1542 1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1544 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1545 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1546 1547 1548 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1549 JNIWrapper("CallVoidMethod"); 1550 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1551 DT_VOID_RETURN_MARK(CallVoidMethod); 1552 1553 va_list args; 1554 va_start(args, methodID); 1555 JavaValue jvalue(T_VOID); 1556 JNI_ArgumentPusherVaArg ap(methodID, args); 1557 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1558 va_end(args); 1559 JNI_END 1560 1561 1562 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1563 JNIWrapper("CallVoidMethodV"); 1564 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1565 DT_VOID_RETURN_MARK(CallVoidMethodV); 1566 1567 JavaValue jvalue(T_VOID); 1568 JNI_ArgumentPusherVaArg ap(methodID, args); 1569 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1570 JNI_END 1571 1572 1573 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1574 JNIWrapper("CallVoidMethodA"); 1575 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1576 DT_VOID_RETURN_MARK(CallVoidMethodA); 1577 1578 JavaValue jvalue(T_VOID); 1579 JNI_ArgumentPusherArray ap(methodID, args); 1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1581 JNI_END 1582 1583 1584 1585 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1586 , EntryProbe, ReturnProbe) \ 1587 \ 1588 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1589 , ReturnProbe);\ 1590 \ 1591 JNI_ENTRY(ResultType, \ 1592 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1593 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1594 \ 1595 EntryProbe;\ 1596 ResultType ret;\ 1597 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1598 (const ResultType&)ret);\ 1599 \ 1600 va_list args; \ 1601 va_start(args, methodID); \ 1602 JavaValue jvalue(Tag); \ 1603 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1604 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1605 va_end(args); \ 1606 ret = jvalue.get_##ResultType(); \ 1607 return ret;\ 1608 JNI_END 1609 1610 // the runtime type of subword integral basic types is integer 1611 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1612 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1613 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1614 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1615 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1616 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1617 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1618 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1619 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1620 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1621 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1622 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1623 1624 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1625 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1627 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1628 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1629 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1630 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1631 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1632 // Float and double probes don't return value because dtrace doesn't currently support it 1633 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1634 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1635 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1637 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1638 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1639 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1640 1641 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1642 , EntryProbe, ReturnProbe) \ 1643 \ 1644 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1645 , ReturnProbe);\ 1646 \ 1647 JNI_ENTRY(ResultType, \ 1648 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1649 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1650 \ 1651 EntryProbe;\ 1652 ResultType ret;\ 1653 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1654 (const ResultType&)ret);\ 1655 \ 1656 JavaValue jvalue(Tag); \ 1657 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1658 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1659 ret = jvalue.get_##ResultType(); \ 1660 return ret;\ 1661 JNI_END 1662 1663 // the runtime type of subword integral basic types is integer 1664 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1665 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1666 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1667 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1668 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1669 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1670 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1671 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1672 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1673 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1674 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1675 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1676 1677 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1678 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1680 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1681 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1683 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1684 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1685 // Float and double probes don't return value because dtrace doesn't currently support it 1686 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1687 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1688 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1690 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1691 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1692 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1693 1694 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1695 , EntryProbe, ReturnProbe) \ 1696 \ 1697 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1698 , ReturnProbe);\ 1699 \ 1700 JNI_ENTRY(ResultType, \ 1701 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1702 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1703 \ 1704 EntryProbe;\ 1705 ResultType ret;\ 1706 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1707 (const ResultType&)ret);\ 1708 \ 1709 JavaValue jvalue(Tag); \ 1710 JNI_ArgumentPusherArray ap(methodID, args); \ 1711 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1712 ret = jvalue.get_##ResultType(); \ 1713 return ret;\ 1714 JNI_END 1715 1716 // the runtime type of subword integral basic types is integer 1717 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1718 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1719 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1720 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1721 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1722 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1723 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1724 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1725 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1726 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1727 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1728 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1729 1730 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1731 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1732 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1733 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1734 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1735 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1736 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1737 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1738 // Float and double probes don't return value because dtrace doesn't currently support it 1739 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1740 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1741 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1743 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1744 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1745 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1746 1747 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1748 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1749 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1750 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1751 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1752 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1753 1754 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1755 JNIWrapper("CallNonvirtualVoidMethod"); 1756 1757 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1758 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1759 1760 va_list args; 1761 va_start(args, methodID); 1762 JavaValue jvalue(T_VOID); 1763 JNI_ArgumentPusherVaArg ap(methodID, args); 1764 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1765 va_end(args); 1766 JNI_END 1767 1768 1769 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1770 JNIWrapper("CallNonvirtualVoidMethodV"); 1771 1772 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1773 env, obj, cls, (uintptr_t) methodID); 1774 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1775 1776 JavaValue jvalue(T_VOID); 1777 JNI_ArgumentPusherVaArg ap(methodID, args); 1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1779 JNI_END 1780 1781 1782 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1783 JNIWrapper("CallNonvirtualVoidMethodA"); 1784 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1785 env, obj, cls, (uintptr_t) methodID); 1786 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1787 JavaValue jvalue(T_VOID); 1788 JNI_ArgumentPusherArray ap(methodID, args); 1789 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1790 JNI_END 1791 1792 1793 1794 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1795 , EntryProbe, ResultProbe) \ 1796 \ 1797 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1798 , ResultProbe); \ 1799 \ 1800 JNI_ENTRY(ResultType, \ 1801 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1802 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1803 \ 1804 EntryProbe; \ 1805 ResultType ret = 0;\ 1806 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1807 (const ResultType&)ret);\ 1808 \ 1809 va_list args; \ 1810 va_start(args, methodID); \ 1811 JavaValue jvalue(Tag); \ 1812 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1813 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1814 va_end(args); \ 1815 ret = jvalue.get_##ResultType(); \ 1816 return ret;\ 1817 JNI_END 1818 1819 // the runtime type of subword integral basic types is integer 1820 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1821 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1822 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1823 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1824 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1825 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1826 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1827 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1828 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1829 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1830 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1831 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1832 1833 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1834 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1835 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1836 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1837 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1838 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1839 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1840 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1841 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1842 // Float and double probes don't return value because dtrace doesn't currently support it 1843 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1844 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1846 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1847 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1848 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1849 1850 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1851 , EntryProbe, ResultProbe) \ 1852 \ 1853 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1854 , ResultProbe); \ 1855 \ 1856 JNI_ENTRY(ResultType, \ 1857 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1858 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1859 \ 1860 EntryProbe; \ 1861 ResultType ret = 0;\ 1862 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1863 (const ResultType&)ret);\ 1864 \ 1865 JavaValue jvalue(Tag); \ 1866 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1867 /* Make sure class is initialized before trying to invoke its method */ \ 1868 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1869 k()->initialize(CHECK_0); \ 1870 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1871 va_end(args); \ 1872 ret = jvalue.get_##ResultType(); \ 1873 return ret;\ 1874 JNI_END 1875 1876 // the runtime type of subword integral basic types is integer 1877 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1878 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1879 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1880 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1881 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1882 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1883 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1884 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1885 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1886 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1887 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1888 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1889 1890 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1891 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1892 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1893 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1894 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1895 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1896 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1897 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1898 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1899 // Float and double probes don't return value because dtrace doesn't currently support it 1900 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1901 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1903 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1904 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1905 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1906 1907 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1908 , EntryProbe, ResultProbe) \ 1909 \ 1910 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1911 , ResultProbe); \ 1912 \ 1913 JNI_ENTRY(ResultType, \ 1914 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1915 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1916 \ 1917 EntryProbe; \ 1918 ResultType ret = 0;\ 1919 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1920 (const ResultType&)ret);\ 1921 \ 1922 JavaValue jvalue(Tag); \ 1923 JNI_ArgumentPusherArray ap(methodID, args); \ 1924 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1925 ret = jvalue.get_##ResultType(); \ 1926 return ret;\ 1927 JNI_END 1928 1929 // the runtime type of subword integral basic types is integer 1930 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1931 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1932 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1933 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1934 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1935 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1936 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1937 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1938 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1939 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1940 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1941 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1942 1943 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1944 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1945 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1946 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1947 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1948 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1949 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1950 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1951 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1952 // Float and double probes don't return value because dtrace doesn't currently support it 1953 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1954 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1956 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1957 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1958 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1959 1960 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1961 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1962 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1963 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1964 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1965 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1966 1967 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1968 JNIWrapper("CallStaticVoidMethod"); 1969 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1970 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1971 1972 va_list args; 1973 va_start(args, methodID); 1974 JavaValue jvalue(T_VOID); 1975 JNI_ArgumentPusherVaArg ap(methodID, args); 1976 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1977 va_end(args); 1978 JNI_END 1979 1980 1981 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1982 JNIWrapper("CallStaticVoidMethodV"); 1983 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1984 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1985 1986 JavaValue jvalue(T_VOID); 1987 JNI_ArgumentPusherVaArg ap(methodID, args); 1988 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1989 JNI_END 1990 1991 1992 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1993 JNIWrapper("CallStaticVoidMethodA"); 1994 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1995 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1996 1997 JavaValue jvalue(T_VOID); 1998 JNI_ArgumentPusherArray ap(methodID, args); 1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2000 JNI_END 2001 2002 2003 // 2004 // Accessing Fields 2005 // 2006 2007 2008 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2009 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2010 2011 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2012 const char *name, const char *sig)) 2013 JNIWrapper("GetFieldID"); 2014 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2015 jfieldID ret = 0; 2016 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2017 2018 // The class should have been loaded (we have an instance of the class 2019 // passed in) so the field and signature should already be in the symbol 2020 // table. If they're not there, the field doesn't exist. 2021 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2022 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2023 if (fieldname == NULL || signame == NULL) { 2024 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2025 } 2026 KlassHandle k(THREAD, 2027 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2028 // Make sure class is initialized before handing id's out to fields 2029 k()->initialize(CHECK_NULL); 2030 2031 fieldDescriptor fd; 2032 if (!k()->is_instance_klass() || 2033 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2034 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2035 } 2036 2037 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2038 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2039 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2040 return ret; 2041 JNI_END 2042 2043 2044 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2045 JNIWrapper("GetObjectField"); 2046 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2047 oop o = JNIHandles::resolve_non_null(obj); 2048 Klass* k = o->klass(); 2049 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2050 // Keep JVMTI addition small and only check enabled flag here. 2051 // jni_GetField_probe() assumes that is okay to create handles. 2052 if (JvmtiExport::should_post_field_access()) { 2053 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2054 } 2055 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2056 #if INCLUDE_ALL_GCS 2057 // If G1 is enabled and we are accessing the value of the referent 2058 // field in a reference object then we need to register a non-null 2059 // referent with the SATB barrier. 2060 if (UseG1GC) { 2061 bool needs_barrier = false; 2062 2063 if (ret != NULL && 2064 offset == java_lang_ref_Reference::referent_offset && 2065 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2066 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2067 needs_barrier = true; 2068 } 2069 2070 if (needs_barrier) { 2071 oop referent = JNIHandles::resolve(ret); 2072 G1SATBCardTableModRefBS::enqueue(referent); 2073 } 2074 } 2075 #endif // INCLUDE_ALL_GCS 2076 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2077 return ret; 2078 JNI_END 2079 2080 2081 2082 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2083 , EntryProbe, ReturnProbe) \ 2084 \ 2085 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2086 , ReturnProbe); \ 2087 \ 2088 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2089 JNIWrapper("Get" XSTR(Result) "Field"); \ 2090 \ 2091 EntryProbe; \ 2092 Return ret = 0;\ 2093 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2094 \ 2095 oop o = JNIHandles::resolve_non_null(obj); \ 2096 Klass* k = o->klass(); \ 2097 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2098 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2099 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2100 /* and creates a ResetNoHandleMark. */ \ 2101 if (JvmtiExport::should_post_field_access()) { \ 2102 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2103 } \ 2104 ret = o->Fieldname##_field(offset); \ 2105 return ret; \ 2106 JNI_END 2107 2108 DEFINE_GETFIELD(jboolean, bool, Boolean 2109 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2110 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2111 DEFINE_GETFIELD(jbyte, byte, Byte 2112 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2113 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2114 DEFINE_GETFIELD(jchar, char, Char 2115 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2116 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2117 DEFINE_GETFIELD(jshort, short, Short 2118 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2119 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2120 DEFINE_GETFIELD(jint, int, Int 2121 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2122 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2123 DEFINE_GETFIELD(jlong, long, Long 2124 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2125 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2126 // Float and double probes don't return value because dtrace doesn't currently support it 2127 DEFINE_GETFIELD(jfloat, float, Float 2128 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2129 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2130 DEFINE_GETFIELD(jdouble, double, Double 2131 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2132 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2133 2134 address jni_GetBooleanField_addr() { 2135 return (address)jni_GetBooleanField; 2136 } 2137 address jni_GetByteField_addr() { 2138 return (address)jni_GetByteField; 2139 } 2140 address jni_GetCharField_addr() { 2141 return (address)jni_GetCharField; 2142 } 2143 address jni_GetShortField_addr() { 2144 return (address)jni_GetShortField; 2145 } 2146 address jni_GetIntField_addr() { 2147 return (address)jni_GetIntField; 2148 } 2149 address jni_GetLongField_addr() { 2150 return (address)jni_GetLongField; 2151 } 2152 address jni_GetFloatField_addr() { 2153 return (address)jni_GetFloatField; 2154 } 2155 address jni_GetDoubleField_addr() { 2156 return (address)jni_GetDoubleField; 2157 } 2158 2159 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2160 JNIWrapper("SetObjectField"); 2161 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2162 oop o = JNIHandles::resolve_non_null(obj); 2163 Klass* k = o->klass(); 2164 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2165 // Keep JVMTI addition small and only check enabled flag here. 2166 // jni_SetField_probe_nh() assumes that is not okay to create handles 2167 // and creates a ResetNoHandleMark. 2168 if (JvmtiExport::should_post_field_modification()) { 2169 jvalue field_value; 2170 field_value.l = value; 2171 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2172 } 2173 o->obj_field_put(offset, JNIHandles::resolve(value)); 2174 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2175 JNI_END 2176 2177 2178 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2179 , EntryProbe, ReturnProbe) \ 2180 \ 2181 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2182 JNIWrapper("Set" XSTR(Result) "Field"); \ 2183 \ 2184 EntryProbe; \ 2185 \ 2186 oop o = JNIHandles::resolve_non_null(obj); \ 2187 Klass* k = o->klass(); \ 2188 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2189 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2190 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2191 /* and creates a ResetNoHandleMark. */ \ 2192 if (JvmtiExport::should_post_field_modification()) { \ 2193 jvalue field_value; \ 2194 field_value.unionType = value; \ 2195 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2196 } \ 2197 o->Fieldname##_field_put(offset, value); \ 2198 ReturnProbe; \ 2199 JNI_END 2200 2201 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2202 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2203 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2204 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2205 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2206 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2207 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2208 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2209 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2210 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2211 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2212 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2213 DEFINE_SETFIELD(jint, int, Int, 'I', i 2214 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2215 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2216 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2217 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2218 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2219 // Float and double probes don't return value because dtrace doesn't currently support it 2220 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2221 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2222 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2223 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2224 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2225 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2226 2227 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2228 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2229 2230 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2231 JNIWrapper("ToReflectedField"); 2232 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2233 jobject ret = NULL; 2234 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2235 2236 fieldDescriptor fd; 2237 bool found = false; 2238 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2239 2240 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2241 2242 if (isStatic) { 2243 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2244 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2245 assert(id->is_static_field_id(), "invalid static field id"); 2246 found = id->find_local_field(&fd); 2247 } else { 2248 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2249 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2250 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2251 } 2252 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2253 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2254 ret = JNIHandles::make_local(env, reflected); 2255 return ret; 2256 JNI_END 2257 2258 2259 // 2260 // Accessing Static Fields 2261 // 2262 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2263 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2264 2265 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2266 const char *name, const char *sig)) 2267 JNIWrapper("GetStaticFieldID"); 2268 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2269 jfieldID ret = NULL; 2270 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2271 2272 // The class should have been loaded (we have an instance of the class 2273 // passed in) so the field and signature should already be in the symbol 2274 // table. If they're not there, the field doesn't exist. 2275 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2276 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2277 if (fieldname == NULL || signame == NULL) { 2278 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2279 } 2280 KlassHandle k(THREAD, 2281 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2282 // Make sure class is initialized before handing id's out to static fields 2283 k()->initialize(CHECK_NULL); 2284 2285 fieldDescriptor fd; 2286 if (!k()->is_instance_klass() || 2287 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2288 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2289 } 2290 2291 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2292 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2293 debug_only(id->set_is_static_field_id();) 2294 2295 debug_only(id->verify(fd.field_holder())); 2296 2297 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2298 return ret; 2299 JNI_END 2300 2301 2302 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2303 JNIWrapper("GetStaticObjectField"); 2304 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2305 #if INCLUDE_JNI_CHECK 2306 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2307 #endif // INCLUDE_JNI_CHECK 2308 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2309 assert(id->is_static_field_id(), "invalid static field id"); 2310 // Keep JVMTI addition small and only check enabled flag here. 2311 // jni_GetField_probe() assumes that is okay to create handles. 2312 if (JvmtiExport::should_post_field_access()) { 2313 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2314 } 2315 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2316 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2317 return ret; 2318 JNI_END 2319 2320 2321 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2322 , EntryProbe, ReturnProbe) \ 2323 \ 2324 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2325 , ReturnProbe); \ 2326 \ 2327 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2328 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2329 EntryProbe; \ 2330 Return ret = 0;\ 2331 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2332 (const Return&)ret);\ 2333 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2334 assert(id->is_static_field_id(), "invalid static field id"); \ 2335 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2336 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2337 if (JvmtiExport::should_post_field_access()) { \ 2338 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2339 } \ 2340 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2341 return ret;\ 2342 JNI_END 2343 2344 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2345 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2346 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2347 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2348 DEFINE_GETSTATICFIELD(jchar, char, Char 2349 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2350 DEFINE_GETSTATICFIELD(jshort, short, Short 2351 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2352 DEFINE_GETSTATICFIELD(jint, int, Int 2353 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2354 DEFINE_GETSTATICFIELD(jlong, long, Long 2355 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2356 // Float and double probes don't return value because dtrace doesn't currently support it 2357 DEFINE_GETSTATICFIELD(jfloat, float, Float 2358 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2359 DEFINE_GETSTATICFIELD(jdouble, double, Double 2360 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2361 2362 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2363 JNIWrapper("SetStaticObjectField"); 2364 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2365 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2366 assert(id->is_static_field_id(), "invalid static field id"); 2367 // Keep JVMTI addition small and only check enabled flag here. 2368 // jni_SetField_probe() assumes that is okay to create handles. 2369 if (JvmtiExport::should_post_field_modification()) { 2370 jvalue field_value; 2371 field_value.l = value; 2372 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2373 } 2374 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2375 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2376 JNI_END 2377 2378 2379 2380 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2381 , EntryProbe, ReturnProbe) \ 2382 \ 2383 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2384 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2385 EntryProbe; \ 2386 \ 2387 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2388 assert(id->is_static_field_id(), "invalid static field id"); \ 2389 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2390 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2391 if (JvmtiExport::should_post_field_modification()) { \ 2392 jvalue field_value; \ 2393 field_value.unionType = value; \ 2394 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2395 } \ 2396 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2397 ReturnProbe;\ 2398 JNI_END 2399 2400 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2401 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2402 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2403 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2404 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2405 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2406 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2407 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2408 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2409 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2410 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2411 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2412 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2413 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2414 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2415 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2416 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2417 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2418 // Float and double probes don't return value because dtrace doesn't currently support it 2419 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2420 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2421 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2422 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2423 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2424 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2425 2426 // 2427 // String Operations 2428 // 2429 2430 // Unicode Interface 2431 2432 DT_RETURN_MARK_DECL(NewString, jstring 2433 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2434 2435 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2436 JNIWrapper("NewString"); 2437 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2438 jstring ret = NULL; 2439 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2440 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2441 ret = (jstring) JNIHandles::make_local(env, string); 2442 return ret; 2443 JNI_END 2444 2445 2446 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2447 JNIWrapper("GetStringLength"); 2448 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2449 jsize ret = 0; 2450 oop s = JNIHandles::resolve_non_null(string); 2451 if (java_lang_String::value(s) != NULL) { 2452 ret = java_lang_String::length(s); 2453 } 2454 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2455 return ret; 2456 JNI_END 2457 2458 2459 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2460 JNIEnv *env, jstring string, jboolean *isCopy)) 2461 JNIWrapper("GetStringChars"); 2462 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2463 jchar* buf = NULL; 2464 oop s = JNIHandles::resolve_non_null(string); 2465 typeArrayOop s_value = java_lang_String::value(s); 2466 if (s_value != NULL) { 2467 int s_len = java_lang_String::length(s); 2468 bool is_latin1 = java_lang_String::is_latin1(s); 2469 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2470 /* JNI Specification states return NULL on OOM */ 2471 if (buf != NULL) { 2472 if (s_len > 0) { 2473 if (!is_latin1) { 2474 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2475 } else { 2476 for (int i = 0; i < s_len; i++) { 2477 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2478 } 2479 } 2480 } 2481 buf[s_len] = 0; 2482 //%note jni_5 2483 if (isCopy != NULL) { 2484 *isCopy = JNI_TRUE; 2485 } 2486 } 2487 } 2488 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2489 return buf; 2490 JNI_END 2491 2492 2493 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2494 JNIWrapper("ReleaseStringChars"); 2495 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2496 //%note jni_6 2497 if (chars != NULL) { 2498 // Since String objects are supposed to be immutable, don't copy any 2499 // new data back. A bad user will have to go after the char array. 2500 FreeHeap((void*) chars); 2501 } 2502 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2503 JNI_END 2504 2505 2506 // UTF Interface 2507 2508 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2509 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2510 2511 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2512 JNIWrapper("NewStringUTF"); 2513 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2514 jstring ret; 2515 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2516 2517 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2518 ret = (jstring) JNIHandles::make_local(env, result); 2519 return ret; 2520 JNI_END 2521 2522 2523 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2524 JNIWrapper("GetStringUTFLength"); 2525 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2526 jsize ret = 0; 2527 oop java_string = JNIHandles::resolve_non_null(string); 2528 if (java_lang_String::value(java_string) != NULL) { 2529 ret = java_lang_String::utf8_length(java_string); 2530 } 2531 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2532 return ret; 2533 JNI_END 2534 2535 2536 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2537 JNIWrapper("GetStringUTFChars"); 2538 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2539 char* result = NULL; 2540 oop java_string = JNIHandles::resolve_non_null(string); 2541 if (java_lang_String::value(java_string) != NULL) { 2542 size_t length = java_lang_String::utf8_length(java_string); 2543 /* JNI Specification states return NULL on OOM */ 2544 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2545 if (result != NULL) { 2546 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2547 if (isCopy != NULL) { 2548 *isCopy = JNI_TRUE; 2549 } 2550 } 2551 } 2552 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2553 return result; 2554 JNI_END 2555 2556 2557 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2558 JNIWrapper("ReleaseStringUTFChars"); 2559 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2560 if (chars != NULL) { 2561 FreeHeap((char*) chars); 2562 } 2563 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2564 JNI_END 2565 2566 2567 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2568 JNIWrapper("GetArrayLength"); 2569 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2570 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2571 assert(a->is_array(), "must be array"); 2572 jsize ret = a->length(); 2573 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2574 return ret; 2575 JNI_END 2576 2577 2578 // 2579 // Object Array Operations 2580 // 2581 2582 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2583 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2584 2585 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2586 JNIWrapper("NewObjectArray"); 2587 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2588 jobjectArray ret = NULL; 2589 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2590 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2591 Klass* ako = ek()->array_klass(CHECK_NULL); 2592 KlassHandle ak = KlassHandle(THREAD, ako); 2593 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2594 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2595 oop initial_value = JNIHandles::resolve(initialElement); 2596 if (initial_value != NULL) { // array already initialized with NULL 2597 for (int index = 0; index < length; index++) { 2598 result->obj_at_put(index, initial_value); 2599 } 2600 } 2601 ret = (jobjectArray) JNIHandles::make_local(env, result); 2602 return ret; 2603 JNI_END 2604 2605 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2606 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2607 2608 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2609 JNIWrapper("GetObjectArrayElement"); 2610 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2611 jobject ret = NULL; 2612 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2613 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2614 if (a->is_within_bounds(index)) { 2615 ret = JNIHandles::make_local(env, a->obj_at(index)); 2616 return ret; 2617 } else { 2618 char buf[jintAsStringSize]; 2619 sprintf(buf, "%d", index); 2620 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2621 } 2622 JNI_END 2623 2624 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2625 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2626 2627 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2628 JNIWrapper("SetObjectArrayElement"); 2629 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2630 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2631 2632 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2633 oop v = JNIHandles::resolve(value); 2634 if (a->is_within_bounds(index)) { 2635 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2636 a->obj_at_put(index, v); 2637 } else { 2638 THROW(vmSymbols::java_lang_ArrayStoreException()); 2639 } 2640 } else { 2641 char buf[jintAsStringSize]; 2642 sprintf(buf, "%d", index); 2643 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2644 } 2645 JNI_END 2646 2647 2648 2649 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2650 ,EntryProbe,ReturnProbe) \ 2651 \ 2652 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2653 , ReturnProbe); \ 2654 \ 2655 JNI_ENTRY(Return, \ 2656 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2657 JNIWrapper("New" XSTR(Result) "Array"); \ 2658 EntryProbe; \ 2659 Return ret = NULL;\ 2660 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2661 \ 2662 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2663 ret = (Return) JNIHandles::make_local(env, obj); \ 2664 return ret;\ 2665 JNI_END 2666 2667 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2668 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2669 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2670 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2671 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2672 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2673 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2674 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2675 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2676 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2677 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2678 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2679 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2680 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2681 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2682 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2683 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2684 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2685 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2686 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2687 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2688 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2689 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2690 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2691 2692 // Return an address which will fault if the caller writes to it. 2693 2694 static char* get_bad_address() { 2695 static char* bad_address = NULL; 2696 if (bad_address == NULL) { 2697 size_t size = os::vm_allocation_granularity(); 2698 bad_address = os::reserve_memory(size); 2699 if (bad_address != NULL) { 2700 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2701 /*is_committed*/false); 2702 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2703 } 2704 } 2705 return bad_address; 2706 } 2707 2708 2709 2710 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2711 , EntryProbe, ReturnProbe) \ 2712 \ 2713 JNI_QUICK_ENTRY(ElementType*, \ 2714 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2715 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2716 EntryProbe; \ 2717 /* allocate an chunk of memory in c land */ \ 2718 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2719 ElementType* result; \ 2720 int len = a->length(); \ 2721 if (len == 0) { \ 2722 /* Empty array: legal but useless, can't return NULL. \ 2723 * Return a pointer to something useless. \ 2724 * Avoid asserts in typeArrayOop. */ \ 2725 result = (ElementType*)get_bad_address(); \ 2726 } else { \ 2727 /* JNI Specification states return NULL on OOM */ \ 2728 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2729 if (result != NULL) { \ 2730 /* copy the array to the c chunk */ \ 2731 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2732 if (isCopy) { \ 2733 *isCopy = JNI_TRUE; \ 2734 } \ 2735 } \ 2736 } \ 2737 ReturnProbe; \ 2738 return result; \ 2739 JNI_END 2740 2741 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2742 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2743 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2744 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2745 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2746 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2747 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2748 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2749 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2750 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2751 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2752 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2753 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2754 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2755 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2756 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2757 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2758 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2759 // Float and double probes don't return value because dtrace doesn't currently support it 2760 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2761 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2762 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2763 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2764 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2765 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2766 2767 2768 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2769 , EntryProbe, ReturnProbe);\ 2770 \ 2771 JNI_QUICK_ENTRY(void, \ 2772 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2773 ElementType *buf, jint mode)) \ 2774 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2775 EntryProbe; \ 2776 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2777 int len = a->length(); \ 2778 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2779 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2780 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2781 } \ 2782 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2783 FreeHeap(buf); \ 2784 } \ 2785 } \ 2786 ReturnProbe; \ 2787 JNI_END 2788 2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2790 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2791 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2793 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2794 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2796 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2797 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2799 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2800 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2802 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2803 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2805 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2806 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2808 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2809 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2811 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2812 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2813 2814 2815 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2816 , EntryProbe, ReturnProbe); \ 2817 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2818 , ReturnProbe); \ 2819 \ 2820 JNI_ENTRY(void, \ 2821 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2822 jsize len, ElementType *buf)) \ 2823 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2824 EntryProbe; \ 2825 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2826 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2827 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2828 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2829 } else { \ 2830 if (len > 0) { \ 2831 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2832 memcpy((u_char*) buf, \ 2833 (u_char*) src->Tag##_at_addr(start), \ 2834 len << sc); \ 2835 } \ 2836 } \ 2837 JNI_END 2838 2839 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2840 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2841 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2842 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2843 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2844 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2845 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2846 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2847 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2848 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2849 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2850 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2851 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2852 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2853 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2854 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2855 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2856 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2857 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2858 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2859 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2860 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2861 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2862 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2863 2864 2865 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2866 , EntryProbe, ReturnProbe); \ 2867 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2868 ,ReturnProbe); \ 2869 \ 2870 JNI_ENTRY(void, \ 2871 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2872 jsize len, const ElementType *buf)) \ 2873 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2874 EntryProbe; \ 2875 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2876 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2877 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2878 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2879 } else { \ 2880 if (len > 0) { \ 2881 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2882 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2883 (u_char*) buf, \ 2884 len << sc); \ 2885 } \ 2886 } \ 2887 JNI_END 2888 2889 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2890 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2891 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2892 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2893 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2894 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2895 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2896 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2897 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2898 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2899 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2900 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2901 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2902 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2903 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2904 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2905 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2906 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2907 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2908 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2909 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2910 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2911 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2912 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2913 2914 2915 // 2916 // Interception of natives 2917 // 2918 2919 // The RegisterNatives call being attempted tried to register with a method that 2920 // is not native. Ask JVM TI what prefixes have been specified. Then check 2921 // to see if the native method is now wrapped with the prefixes. See the 2922 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2923 static Method* find_prefixed_native(KlassHandle k, 2924 Symbol* name, Symbol* signature, TRAPS) { 2925 #if INCLUDE_JVMTI 2926 ResourceMark rm(THREAD); 2927 Method* method; 2928 int name_len = name->utf8_length(); 2929 char* name_str = name->as_utf8(); 2930 int prefix_count; 2931 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2932 for (int i = 0; i < prefix_count; i++) { 2933 char* prefix = prefixes[i]; 2934 int prefix_len = (int)strlen(prefix); 2935 2936 // try adding this prefix to the method name and see if it matches another method name 2937 int trial_len = name_len + prefix_len; 2938 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2939 strcpy(trial_name_str, prefix); 2940 strcat(trial_name_str, name_str); 2941 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2942 if (trial_name == NULL) { 2943 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2944 } 2945 method = k()->lookup_method(trial_name, signature); 2946 if (method == NULL) { 2947 continue; // signature doesn't match, try the next prefix 2948 } 2949 if (method->is_native()) { 2950 method->set_is_prefixed_native(); 2951 return method; // wahoo, we found a prefixed version of the method, return it 2952 } 2953 // found as non-native, so prefix is good, add it, probably just need more prefixes 2954 name_len = trial_len; 2955 name_str = trial_name_str; 2956 } 2957 #endif // INCLUDE_JVMTI 2958 return NULL; // not found 2959 } 2960 2961 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2962 Method* method = k()->lookup_method(name, signature); 2963 if (method == NULL) { 2964 ResourceMark rm; 2965 stringStream st; 2966 st.print("Method %s name or signature does not match", 2967 Method::name_and_sig_as_C_string(k(), name, signature)); 2968 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2969 } 2970 if (!method->is_native()) { 2971 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2972 method = find_prefixed_native(k, name, signature, THREAD); 2973 if (method == NULL) { 2974 ResourceMark rm; 2975 stringStream st; 2976 st.print("Method %s is not declared as native", 2977 Method::name_and_sig_as_C_string(k(), name, signature)); 2978 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2979 } 2980 } 2981 2982 if (entry != NULL) { 2983 method->set_native_function(entry, 2984 Method::native_bind_event_is_interesting); 2985 } else { 2986 method->clear_native_function(); 2987 } 2988 if (PrintJNIResolving) { 2989 ResourceMark rm(THREAD); 2990 tty->print_cr("[Registering JNI native method %s.%s]", 2991 method->method_holder()->external_name(), 2992 method->name()->as_C_string()); 2993 } 2994 return true; 2995 } 2996 2997 DT_RETURN_MARK_DECL(RegisterNatives, jint 2998 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2999 3000 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3001 const JNINativeMethod *methods, 3002 jint nMethods)) 3003 JNIWrapper("RegisterNatives"); 3004 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3005 jint ret = 0; 3006 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3007 3008 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3009 3010 for (int index = 0; index < nMethods; index++) { 3011 const char* meth_name = methods[index].name; 3012 const char* meth_sig = methods[index].signature; 3013 int meth_name_len = (int)strlen(meth_name); 3014 3015 // The class should have been loaded (we have an instance of the class 3016 // passed in) so the method and signature should already be in the symbol 3017 // table. If they're not there, the method doesn't exist. 3018 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3019 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3020 3021 if (name == NULL || signature == NULL) { 3022 ResourceMark rm; 3023 stringStream st; 3024 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3025 // Must return negative value on failure 3026 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3027 } 3028 3029 bool res = register_native(h_k, name, signature, 3030 (address) methods[index].fnPtr, THREAD); 3031 if (!res) { 3032 ret = -1; 3033 break; 3034 } 3035 } 3036 return ret; 3037 JNI_END 3038 3039 3040 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3041 JNIWrapper("UnregisterNatives"); 3042 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3043 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3044 //%note jni_2 3045 if (k->is_instance_klass()) { 3046 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3047 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3048 if (m->is_native()) { 3049 m->clear_native_function(); 3050 m->set_signature_handler(NULL); 3051 } 3052 } 3053 } 3054 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3055 return 0; 3056 JNI_END 3057 3058 // 3059 // Monitor functions 3060 // 3061 3062 DT_RETURN_MARK_DECL(MonitorEnter, jint 3063 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3064 3065 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3066 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3067 jint ret = JNI_ERR; 3068 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3069 3070 // If the object is null, we can't do anything with it 3071 if (jobj == NULL) { 3072 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3073 } 3074 3075 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3076 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3077 ret = JNI_OK; 3078 return ret; 3079 JNI_END 3080 3081 DT_RETURN_MARK_DECL(MonitorExit, jint 3082 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3083 3084 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3085 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3086 jint ret = JNI_ERR; 3087 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3088 3089 // Don't do anything with a null object 3090 if (jobj == NULL) { 3091 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3092 } 3093 3094 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3095 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3096 3097 ret = JNI_OK; 3098 return ret; 3099 JNI_END 3100 3101 // 3102 // Extensions 3103 // 3104 3105 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3106 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3107 3108 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3109 JNIWrapper("GetStringRegion"); 3110 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3111 DT_VOID_RETURN_MARK(GetStringRegion); 3112 oop s = JNIHandles::resolve_non_null(string); 3113 int s_len = java_lang_String::length(s); 3114 if (start < 0 || len < 0 || start + len > s_len) { 3115 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3116 } else { 3117 if (len > 0) { 3118 typeArrayOop s_value = java_lang_String::value(s); 3119 bool is_latin1 = java_lang_String::is_latin1(s); 3120 if (!is_latin1) { 3121 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3122 } else { 3123 for (int i = 0; i < len; i++) { 3124 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3125 } 3126 } 3127 } 3128 } 3129 JNI_END 3130 3131 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3132 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3133 3134 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3135 JNIWrapper("GetStringUTFRegion"); 3136 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3137 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3138 oop s = JNIHandles::resolve_non_null(string); 3139 int s_len = java_lang_String::length(s); 3140 if (start < 0 || len < 0 || start + len > s_len) { 3141 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3142 } else { 3143 //%note jni_7 3144 if (len > 0) { 3145 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3146 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3147 // as_utf8_string null-terminates the result string 3148 } else { 3149 // JDK null-terminates the buffer even in len is zero 3150 if (buf != NULL) { 3151 buf[0] = 0; 3152 } 3153 } 3154 } 3155 JNI_END 3156 3157 3158 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3159 JNIWrapper("GetPrimitiveArrayCritical"); 3160 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3161 GCLocker::lock_critical(thread); 3162 if (isCopy != NULL) { 3163 *isCopy = JNI_FALSE; 3164 } 3165 oop a = JNIHandles::resolve_non_null(array); 3166 assert(a->is_array(), "just checking"); 3167 BasicType type; 3168 if (a->is_objArray()) { 3169 type = T_OBJECT; 3170 } else { 3171 type = TypeArrayKlass::cast(a->klass())->element_type(); 3172 } 3173 void* ret = arrayOop(a)->base(type); 3174 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3175 return ret; 3176 JNI_END 3177 3178 3179 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3180 JNIWrapper("ReleasePrimitiveArrayCritical"); 3181 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3182 // The array, carray and mode arguments are ignored 3183 GCLocker::unlock_critical(thread); 3184 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3185 JNI_END 3186 3187 3188 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3189 JNIWrapper("GetStringCritical"); 3190 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3191 GCLocker::lock_critical(thread); 3192 oop s = JNIHandles::resolve_non_null(string); 3193 typeArrayOop s_value = java_lang_String::value(s); 3194 bool is_latin1 = java_lang_String::is_latin1(s); 3195 if (isCopy != NULL) { 3196 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3197 } 3198 jchar* ret; 3199 if (!is_latin1) { 3200 ret = (jchar*) s_value->base(T_CHAR); 3201 } else { 3202 // Inflate latin1 encoded string to UTF16 3203 int s_len = java_lang_String::length(s); 3204 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3205 /* JNI Specification states return NULL on OOM */ 3206 if (ret != NULL) { 3207 for (int i = 0; i < s_len; i++) { 3208 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3209 } 3210 ret[s_len] = 0; 3211 } 3212 } 3213 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3214 return ret; 3215 JNI_END 3216 3217 3218 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3219 JNIWrapper("ReleaseStringCritical"); 3220 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3221 // The str and chars arguments are ignored for UTF16 strings 3222 oop s = JNIHandles::resolve_non_null(str); 3223 bool is_latin1 = java_lang_String::is_latin1(s); 3224 if (is_latin1) { 3225 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3226 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3227 FREE_C_HEAP_ARRAY(jchar, chars); 3228 } 3229 GCLocker::unlock_critical(thread); 3230 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3231 JNI_END 3232 3233 3234 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3235 JNIWrapper("jni_NewWeakGlobalRef"); 3236 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3237 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3238 jweak ret = JNIHandles::make_weak_global(ref_handle); 3239 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3240 return ret; 3241 JNI_END 3242 3243 // Must be JNI_ENTRY (with HandleMark) 3244 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3245 JNIWrapper("jni_DeleteWeakGlobalRef"); 3246 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3247 JNIHandles::destroy_weak_global(ref); 3248 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3249 JNI_END 3250 3251 3252 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3253 JNIWrapper("jni_ExceptionCheck"); 3254 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3255 jni_check_async_exceptions(thread); 3256 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3257 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3258 return ret; 3259 JNI_END 3260 3261 3262 // Initialization state for three routines below relating to 3263 // java.nio.DirectBuffers 3264 static jint directBufferSupportInitializeStarted = 0; 3265 static volatile jint directBufferSupportInitializeEnded = 0; 3266 static volatile jint directBufferSupportInitializeFailed = 0; 3267 static jclass bufferClass = NULL; 3268 static jclass directBufferClass = NULL; 3269 static jclass directByteBufferClass = NULL; 3270 static jmethodID directByteBufferConstructor = NULL; 3271 static jfieldID directBufferAddressField = NULL; 3272 static jfieldID bufferCapacityField = NULL; 3273 3274 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3275 Handle loader; // null (bootstrap) loader 3276 Handle protection_domain; // null protection domain 3277 3278 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3279 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3280 3281 if (log_is_enabled(Info, classresolve) && result != NULL) { 3282 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3283 } 3284 return result; 3285 } 3286 3287 // These lookups are done with the NULL (bootstrap) ClassLoader to 3288 // circumvent any security checks that would be done by jni_FindClass. 3289 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3290 { 3291 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3292 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3293 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3294 return true; 3295 } 3296 JNI_END 3297 3298 3299 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3300 if (directBufferSupportInitializeFailed) { 3301 return false; 3302 } 3303 3304 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3305 if (!lookupDirectBufferClasses(env)) { 3306 directBufferSupportInitializeFailed = 1; 3307 return false; 3308 } 3309 3310 // Make global references for these 3311 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3312 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3313 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3314 3315 // Get needed field and method IDs 3316 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3317 if (env->ExceptionCheck()) { 3318 env->ExceptionClear(); 3319 directBufferSupportInitializeFailed = 1; 3320 return false; 3321 } 3322 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3323 if (env->ExceptionCheck()) { 3324 env->ExceptionClear(); 3325 directBufferSupportInitializeFailed = 1; 3326 return false; 3327 } 3328 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3329 if (env->ExceptionCheck()) { 3330 env->ExceptionClear(); 3331 directBufferSupportInitializeFailed = 1; 3332 return false; 3333 } 3334 3335 if ((directByteBufferConstructor == NULL) || 3336 (directBufferAddressField == NULL) || 3337 (bufferCapacityField == NULL)) { 3338 directBufferSupportInitializeFailed = 1; 3339 return false; 3340 } 3341 3342 directBufferSupportInitializeEnded = 1; 3343 } else { 3344 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3345 os::naked_yield(); 3346 } 3347 } 3348 3349 return !directBufferSupportInitializeFailed; 3350 } 3351 3352 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3353 { 3354 // thread_from_jni_environment() will block if VM is gone. 3355 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3356 3357 JNIWrapper("jni_NewDirectByteBuffer"); 3358 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3359 3360 if (!directBufferSupportInitializeEnded) { 3361 if (!initializeDirectBufferSupport(env, thread)) { 3362 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3363 return NULL; 3364 } 3365 } 3366 3367 // Being paranoid about accidental sign extension on address 3368 jlong addr = (jlong) ((uintptr_t) address); 3369 // NOTE that package-private DirectByteBuffer constructor currently 3370 // takes int capacity 3371 jint cap = (jint) capacity; 3372 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3373 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3374 return ret; 3375 } 3376 3377 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3378 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3379 3380 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3381 { 3382 // thread_from_jni_environment() will block if VM is gone. 3383 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3384 3385 JNIWrapper("jni_GetDirectBufferAddress"); 3386 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3387 void* ret = NULL; 3388 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3389 3390 if (!directBufferSupportInitializeEnded) { 3391 if (!initializeDirectBufferSupport(env, thread)) { 3392 return 0; 3393 } 3394 } 3395 3396 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3397 return 0; 3398 } 3399 3400 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3401 return ret; 3402 } 3403 3404 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3405 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3406 3407 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3408 { 3409 // thread_from_jni_environment() will block if VM is gone. 3410 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3411 3412 JNIWrapper("jni_GetDirectBufferCapacity"); 3413 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3414 jlong ret = -1; 3415 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3416 3417 if (!directBufferSupportInitializeEnded) { 3418 if (!initializeDirectBufferSupport(env, thread)) { 3419 ret = 0; 3420 return ret; 3421 } 3422 } 3423 3424 if (buf == NULL) { 3425 return -1; 3426 } 3427 3428 if (!env->IsInstanceOf(buf, directBufferClass)) { 3429 return -1; 3430 } 3431 3432 // NOTE that capacity is currently an int in the implementation 3433 ret = env->GetIntField(buf, bufferCapacityField); 3434 return ret; 3435 } 3436 3437 3438 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3439 JNIWrapper("GetVersion"); 3440 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3441 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3442 return CurrentVersion; 3443 JNI_END 3444 3445 extern struct JavaVM_ main_vm; 3446 3447 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3448 JNIWrapper("jni_GetJavaVM"); 3449 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3450 *vm = (JavaVM *)(&main_vm); 3451 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3452 return JNI_OK; 3453 JNI_END 3454 3455 // Structure containing all jni functions 3456 struct JNINativeInterface_ jni_NativeInterface = { 3457 NULL, 3458 NULL, 3459 NULL, 3460 3461 NULL, 3462 3463 jni_GetVersion, 3464 3465 jni_DefineClass, 3466 jni_FindClass, 3467 3468 jni_FromReflectedMethod, 3469 jni_FromReflectedField, 3470 3471 jni_ToReflectedMethod, 3472 3473 jni_GetSuperclass, 3474 jni_IsAssignableFrom, 3475 3476 jni_ToReflectedField, 3477 3478 jni_Throw, 3479 jni_ThrowNew, 3480 jni_ExceptionOccurred, 3481 jni_ExceptionDescribe, 3482 jni_ExceptionClear, 3483 jni_FatalError, 3484 3485 jni_PushLocalFrame, 3486 jni_PopLocalFrame, 3487 3488 jni_NewGlobalRef, 3489 jni_DeleteGlobalRef, 3490 jni_DeleteLocalRef, 3491 jni_IsSameObject, 3492 3493 jni_NewLocalRef, 3494 jni_EnsureLocalCapacity, 3495 3496 jni_AllocObject, 3497 jni_NewObject, 3498 jni_NewObjectV, 3499 jni_NewObjectA, 3500 3501 jni_GetObjectClass, 3502 jni_IsInstanceOf, 3503 3504 jni_GetMethodID, 3505 3506 jni_CallObjectMethod, 3507 jni_CallObjectMethodV, 3508 jni_CallObjectMethodA, 3509 jni_CallBooleanMethod, 3510 jni_CallBooleanMethodV, 3511 jni_CallBooleanMethodA, 3512 jni_CallByteMethod, 3513 jni_CallByteMethodV, 3514 jni_CallByteMethodA, 3515 jni_CallCharMethod, 3516 jni_CallCharMethodV, 3517 jni_CallCharMethodA, 3518 jni_CallShortMethod, 3519 jni_CallShortMethodV, 3520 jni_CallShortMethodA, 3521 jni_CallIntMethod, 3522 jni_CallIntMethodV, 3523 jni_CallIntMethodA, 3524 jni_CallLongMethod, 3525 jni_CallLongMethodV, 3526 jni_CallLongMethodA, 3527 jni_CallFloatMethod, 3528 jni_CallFloatMethodV, 3529 jni_CallFloatMethodA, 3530 jni_CallDoubleMethod, 3531 jni_CallDoubleMethodV, 3532 jni_CallDoubleMethodA, 3533 jni_CallVoidMethod, 3534 jni_CallVoidMethodV, 3535 jni_CallVoidMethodA, 3536 3537 jni_CallNonvirtualObjectMethod, 3538 jni_CallNonvirtualObjectMethodV, 3539 jni_CallNonvirtualObjectMethodA, 3540 jni_CallNonvirtualBooleanMethod, 3541 jni_CallNonvirtualBooleanMethodV, 3542 jni_CallNonvirtualBooleanMethodA, 3543 jni_CallNonvirtualByteMethod, 3544 jni_CallNonvirtualByteMethodV, 3545 jni_CallNonvirtualByteMethodA, 3546 jni_CallNonvirtualCharMethod, 3547 jni_CallNonvirtualCharMethodV, 3548 jni_CallNonvirtualCharMethodA, 3549 jni_CallNonvirtualShortMethod, 3550 jni_CallNonvirtualShortMethodV, 3551 jni_CallNonvirtualShortMethodA, 3552 jni_CallNonvirtualIntMethod, 3553 jni_CallNonvirtualIntMethodV, 3554 jni_CallNonvirtualIntMethodA, 3555 jni_CallNonvirtualLongMethod, 3556 jni_CallNonvirtualLongMethodV, 3557 jni_CallNonvirtualLongMethodA, 3558 jni_CallNonvirtualFloatMethod, 3559 jni_CallNonvirtualFloatMethodV, 3560 jni_CallNonvirtualFloatMethodA, 3561 jni_CallNonvirtualDoubleMethod, 3562 jni_CallNonvirtualDoubleMethodV, 3563 jni_CallNonvirtualDoubleMethodA, 3564 jni_CallNonvirtualVoidMethod, 3565 jni_CallNonvirtualVoidMethodV, 3566 jni_CallNonvirtualVoidMethodA, 3567 3568 jni_GetFieldID, 3569 3570 jni_GetObjectField, 3571 jni_GetBooleanField, 3572 jni_GetByteField, 3573 jni_GetCharField, 3574 jni_GetShortField, 3575 jni_GetIntField, 3576 jni_GetLongField, 3577 jni_GetFloatField, 3578 jni_GetDoubleField, 3579 3580 jni_SetObjectField, 3581 jni_SetBooleanField, 3582 jni_SetByteField, 3583 jni_SetCharField, 3584 jni_SetShortField, 3585 jni_SetIntField, 3586 jni_SetLongField, 3587 jni_SetFloatField, 3588 jni_SetDoubleField, 3589 3590 jni_GetStaticMethodID, 3591 3592 jni_CallStaticObjectMethod, 3593 jni_CallStaticObjectMethodV, 3594 jni_CallStaticObjectMethodA, 3595 jni_CallStaticBooleanMethod, 3596 jni_CallStaticBooleanMethodV, 3597 jni_CallStaticBooleanMethodA, 3598 jni_CallStaticByteMethod, 3599 jni_CallStaticByteMethodV, 3600 jni_CallStaticByteMethodA, 3601 jni_CallStaticCharMethod, 3602 jni_CallStaticCharMethodV, 3603 jni_CallStaticCharMethodA, 3604 jni_CallStaticShortMethod, 3605 jni_CallStaticShortMethodV, 3606 jni_CallStaticShortMethodA, 3607 jni_CallStaticIntMethod, 3608 jni_CallStaticIntMethodV, 3609 jni_CallStaticIntMethodA, 3610 jni_CallStaticLongMethod, 3611 jni_CallStaticLongMethodV, 3612 jni_CallStaticLongMethodA, 3613 jni_CallStaticFloatMethod, 3614 jni_CallStaticFloatMethodV, 3615 jni_CallStaticFloatMethodA, 3616 jni_CallStaticDoubleMethod, 3617 jni_CallStaticDoubleMethodV, 3618 jni_CallStaticDoubleMethodA, 3619 jni_CallStaticVoidMethod, 3620 jni_CallStaticVoidMethodV, 3621 jni_CallStaticVoidMethodA, 3622 3623 jni_GetStaticFieldID, 3624 3625 jni_GetStaticObjectField, 3626 jni_GetStaticBooleanField, 3627 jni_GetStaticByteField, 3628 jni_GetStaticCharField, 3629 jni_GetStaticShortField, 3630 jni_GetStaticIntField, 3631 jni_GetStaticLongField, 3632 jni_GetStaticFloatField, 3633 jni_GetStaticDoubleField, 3634 3635 jni_SetStaticObjectField, 3636 jni_SetStaticBooleanField, 3637 jni_SetStaticByteField, 3638 jni_SetStaticCharField, 3639 jni_SetStaticShortField, 3640 jni_SetStaticIntField, 3641 jni_SetStaticLongField, 3642 jni_SetStaticFloatField, 3643 jni_SetStaticDoubleField, 3644 3645 jni_NewString, 3646 jni_GetStringLength, 3647 jni_GetStringChars, 3648 jni_ReleaseStringChars, 3649 3650 jni_NewStringUTF, 3651 jni_GetStringUTFLength, 3652 jni_GetStringUTFChars, 3653 jni_ReleaseStringUTFChars, 3654 3655 jni_GetArrayLength, 3656 3657 jni_NewObjectArray, 3658 jni_GetObjectArrayElement, 3659 jni_SetObjectArrayElement, 3660 3661 jni_NewBooleanArray, 3662 jni_NewByteArray, 3663 jni_NewCharArray, 3664 jni_NewShortArray, 3665 jni_NewIntArray, 3666 jni_NewLongArray, 3667 jni_NewFloatArray, 3668 jni_NewDoubleArray, 3669 3670 jni_GetBooleanArrayElements, 3671 jni_GetByteArrayElements, 3672 jni_GetCharArrayElements, 3673 jni_GetShortArrayElements, 3674 jni_GetIntArrayElements, 3675 jni_GetLongArrayElements, 3676 jni_GetFloatArrayElements, 3677 jni_GetDoubleArrayElements, 3678 3679 jni_ReleaseBooleanArrayElements, 3680 jni_ReleaseByteArrayElements, 3681 jni_ReleaseCharArrayElements, 3682 jni_ReleaseShortArrayElements, 3683 jni_ReleaseIntArrayElements, 3684 jni_ReleaseLongArrayElements, 3685 jni_ReleaseFloatArrayElements, 3686 jni_ReleaseDoubleArrayElements, 3687 3688 jni_GetBooleanArrayRegion, 3689 jni_GetByteArrayRegion, 3690 jni_GetCharArrayRegion, 3691 jni_GetShortArrayRegion, 3692 jni_GetIntArrayRegion, 3693 jni_GetLongArrayRegion, 3694 jni_GetFloatArrayRegion, 3695 jni_GetDoubleArrayRegion, 3696 3697 jni_SetBooleanArrayRegion, 3698 jni_SetByteArrayRegion, 3699 jni_SetCharArrayRegion, 3700 jni_SetShortArrayRegion, 3701 jni_SetIntArrayRegion, 3702 jni_SetLongArrayRegion, 3703 jni_SetFloatArrayRegion, 3704 jni_SetDoubleArrayRegion, 3705 3706 jni_RegisterNatives, 3707 jni_UnregisterNatives, 3708 3709 jni_MonitorEnter, 3710 jni_MonitorExit, 3711 3712 jni_GetJavaVM, 3713 3714 jni_GetStringRegion, 3715 jni_GetStringUTFRegion, 3716 3717 jni_GetPrimitiveArrayCritical, 3718 jni_ReleasePrimitiveArrayCritical, 3719 3720 jni_GetStringCritical, 3721 jni_ReleaseStringCritical, 3722 3723 jni_NewWeakGlobalRef, 3724 jni_DeleteWeakGlobalRef, 3725 3726 jni_ExceptionCheck, 3727 3728 jni_NewDirectByteBuffer, 3729 jni_GetDirectBufferAddress, 3730 jni_GetDirectBufferCapacity, 3731 3732 // New 1_6 features 3733 3734 jni_GetObjectRefType 3735 }; 3736 3737 3738 // For jvmti use to modify jni function table. 3739 // Java threads in native contiues to run until it is transitioned 3740 // to VM at safepoint. Before the transition or before it is blocked 3741 // for safepoint it may access jni function table. VM could crash if 3742 // any java thread access the jni function table in the middle of memcpy. 3743 // To avoid this each function pointers are copied automically. 3744 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3745 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3746 intptr_t *a = (intptr_t *) jni_functions(); 3747 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3748 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3749 Atomic::store_ptr(*b++, a++); 3750 } 3751 } 3752 3753 void quicken_jni_functions() { 3754 // Replace Get<Primitive>Field with fast versions 3755 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3756 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3757 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3758 // windows x86 currently needs SEH wrapper and the gain of the fast 3759 // versions currently isn't certain for server vm on uniprocessor. 3760 && os::is_MP() 3761 #endif 3762 ) { 3763 address func; 3764 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3765 if (func != (address)-1) { 3766 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3767 } 3768 func = JNI_FastGetField::generate_fast_get_byte_field(); 3769 if (func != (address)-1) { 3770 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3771 } 3772 func = JNI_FastGetField::generate_fast_get_char_field(); 3773 if (func != (address)-1) { 3774 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3775 } 3776 func = JNI_FastGetField::generate_fast_get_short_field(); 3777 if (func != (address)-1) { 3778 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3779 } 3780 func = JNI_FastGetField::generate_fast_get_int_field(); 3781 if (func != (address)-1) { 3782 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3783 } 3784 func = JNI_FastGetField::generate_fast_get_long_field(); 3785 if (func != (address)-1) { 3786 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3787 } 3788 func = JNI_FastGetField::generate_fast_get_float_field(); 3789 if (func != (address)-1) { 3790 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3791 } 3792 func = JNI_FastGetField::generate_fast_get_double_field(); 3793 if (func != (address)-1) { 3794 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3795 } 3796 } 3797 } 3798 3799 // Returns the function structure 3800 struct JNINativeInterface_* jni_functions() { 3801 #if INCLUDE_JNI_CHECK 3802 if (CheckJNICalls) return jni_functions_check(); 3803 #endif // INCLUDE_JNI_CHECK 3804 return &jni_NativeInterface; 3805 } 3806 3807 // Returns the function structure 3808 struct JNINativeInterface_* jni_functions_nocheck() { 3809 return &jni_NativeInterface; 3810 } 3811 3812 3813 // Invocation API 3814 3815 3816 // Forward declaration 3817 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3818 3819 // Global invocation API vars 3820 volatile jint vm_created = 0; 3821 // Indicate whether it is safe to recreate VM 3822 volatile jint safe_to_recreate_vm = 1; 3823 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3824 3825 3826 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3827 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3828 3829 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3830 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3831 3832 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3833 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3834 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3835 jint ret = JNI_ERR; 3836 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3837 3838 if (Threads::is_supported_jni_version(args->version)) { 3839 ret = JNI_OK; 3840 } 3841 // 1.1 style no longer supported in hotspot. 3842 // According the JNI spec, we should update args->version on return. 3843 // We also use the structure to communicate with launcher about default 3844 // stack size. 3845 if (args->version == JNI_VERSION_1_1) { 3846 args->version = JNI_VERSION_1_2; 3847 // javaStackSize is int in arguments structure 3848 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3849 args->javaStackSize = (jint)(ThreadStackSize * K); 3850 } 3851 return ret; 3852 } 3853 3854 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3855 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3856 3857 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3858 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3859 3860 jint result = JNI_ERR; 3861 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3862 3863 // We're about to use Atomic::xchg for synchronization. Some Zero 3864 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3865 // but __sync_lock_test_and_set is not guaranteed to do what we want 3866 // on all architectures. So we check it works before relying on it. 3867 #if defined(ZERO) && defined(ASSERT) 3868 { 3869 jint a = 0xcafebabe; 3870 jint b = Atomic::xchg(0xdeadbeef, &a); 3871 void *c = &a; 3872 void *d = Atomic::xchg_ptr(&b, &c); 3873 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3874 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3875 } 3876 #endif // ZERO && ASSERT 3877 3878 // At the moment it's only possible to have one Java VM, 3879 // since some of the runtime state is in global variables. 3880 3881 // We cannot use our mutex locks here, since they only work on 3882 // Threads. We do an atomic compare and exchange to ensure only 3883 // one thread can call this method at a time 3884 3885 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3886 // the add/dec implementations are dependent on whether we are running 3887 // on a multiprocessor, and at this stage of initialization the os::is_MP 3888 // function used to determine this will always return false. Atomic::xchg 3889 // does not have this problem. 3890 if (Atomic::xchg(1, &vm_created) == 1) { 3891 return JNI_EEXIST; // already created, or create attempt in progress 3892 } 3893 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3894 return JNI_ERR; // someone tried and failed and retry not allowed. 3895 } 3896 3897 assert(vm_created == 1, "vm_created is true during the creation"); 3898 3899 /** 3900 * Certain errors during initialization are recoverable and do not 3901 * prevent this method from being called again at a later time 3902 * (perhaps with different arguments). However, at a certain 3903 * point during initialization if an error occurs we cannot allow 3904 * this function to be called again (or it will crash). In those 3905 * situations, the 'canTryAgain' flag is set to false, which atomically 3906 * sets safe_to_recreate_vm to 1, such that any new call to 3907 * JNI_CreateJavaVM will immediately fail using the above logic. 3908 */ 3909 bool can_try_again = true; 3910 3911 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3912 if (result == JNI_OK) { 3913 JavaThread *thread = JavaThread::current(); 3914 assert(!thread->has_pending_exception(), "should have returned not OK"); 3915 /* thread is thread_in_vm here */ 3916 *vm = (JavaVM *)(&main_vm); 3917 *(JNIEnv**)penv = thread->jni_environment(); 3918 3919 #if INCLUDE_JVMCI 3920 if (EnableJVMCI) { 3921 if (UseJVMCICompiler) { 3922 // JVMCI is initialized on a CompilerThread 3923 if (BootstrapJVMCI) { 3924 JavaThread* THREAD = thread; 3925 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3926 compiler->bootstrap(); 3927 } 3928 } 3929 } 3930 #endif 3931 3932 // Tracks the time application was running before GC 3933 RuntimeService::record_application_start(); 3934 3935 // Notify JVMTI 3936 if (JvmtiExport::should_post_thread_life()) { 3937 JvmtiExport::post_thread_start(thread); 3938 } 3939 3940 EventThreadStart event; 3941 if (event.should_commit()) { 3942 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 3943 event.commit(); 3944 } 3945 3946 #ifndef PRODUCT 3947 // Check if we should compile all classes on bootclasspath 3948 if (CompileTheWorld) ClassLoader::compile_the_world(); 3949 if (ReplayCompiles) ciReplay::replay(thread); 3950 3951 // Some platforms (like Win*) need a wrapper around these test 3952 // functions in order to properly handle error conditions. 3953 test_error_handler(); 3954 if (ExecuteInternalVMTests) { 3955 InternalVMTests::run(); 3956 } 3957 #endif 3958 3959 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3960 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3961 } else { 3962 // If create_vm exits because of a pending exception, exit with that 3963 // exception. In the future when we figure out how to reclaim memory, 3964 // we may be able to exit with JNI_ERR and allow the calling application 3965 // to continue. 3966 if (Universe::is_fully_initialized()) { 3967 // otherwise no pending exception possible - VM will already have aborted 3968 JavaThread* THREAD = JavaThread::current(); 3969 if (HAS_PENDING_EXCEPTION) { 3970 HandleMark hm; 3971 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3972 } 3973 } 3974 3975 if (can_try_again) { 3976 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3977 safe_to_recreate_vm = 1; 3978 } 3979 3980 // Creation failed. We must reset vm_created 3981 *vm = 0; 3982 *(JNIEnv**)penv = 0; 3983 // reset vm_created last to avoid race condition. Use OrderAccess to 3984 // control both compiler and architectural-based reordering. 3985 OrderAccess::release_store(&vm_created, 0); 3986 } 3987 3988 // Flush stdout and stderr before exit. 3989 fflush(stdout); 3990 fflush(stderr); 3991 3992 return result; 3993 3994 } 3995 3996 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3997 jint result = 0; 3998 // On Windows, let CreateJavaVM run with SEH protection 3999 #ifdef _WIN32 4000 __try { 4001 #endif 4002 result = JNI_CreateJavaVM_inner(vm, penv, args); 4003 #ifdef _WIN32 4004 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4005 // Nothing to do. 4006 } 4007 #endif 4008 return result; 4009 } 4010 4011 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4012 // See bug 4367188, the wrapper can sometimes cause VM crashes 4013 // JNIWrapper("GetCreatedJavaVMs"); 4014 4015 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4016 4017 if (vm_created) { 4018 if (numVMs != NULL) *numVMs = 1; 4019 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4020 } else { 4021 if (numVMs != NULL) *numVMs = 0; 4022 } 4023 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4024 return JNI_OK; 4025 } 4026 4027 extern "C" { 4028 4029 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4030 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4031 4032 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4033 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4034 jint res = JNI_ERR; 4035 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4036 4037 if (!vm_created) { 4038 res = JNI_ERR; 4039 return res; 4040 } 4041 4042 JNIWrapper("DestroyJavaVM"); 4043 JNIEnv *env; 4044 JavaVMAttachArgs destroyargs; 4045 destroyargs.version = CurrentVersion; 4046 destroyargs.name = (char *)"DestroyJavaVM"; 4047 destroyargs.group = NULL; 4048 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4049 if (res != JNI_OK) { 4050 return res; 4051 } 4052 4053 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4054 JavaThread* thread = JavaThread::current(); 4055 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4056 if (Threads::destroy_vm()) { 4057 // Should not change thread state, VM is gone 4058 vm_created = false; 4059 res = JNI_OK; 4060 return res; 4061 } else { 4062 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4063 res = JNI_ERR; 4064 return res; 4065 } 4066 } 4067 4068 4069 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4070 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4071 4072 // Check below commented out from JDK1.2fcs as well 4073 /* 4074 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4075 return JNI_EVERSION; 4076 } 4077 */ 4078 4079 Thread* t = Thread::current_or_null(); 4080 if (t != NULL) { 4081 // If the thread has been attached this operation is a no-op 4082 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4083 return JNI_OK; 4084 } 4085 4086 // Create a thread and mark it as attaching so it will be skipped by the 4087 // ThreadsListEnumerator - see CR 6404306 4088 JavaThread* thread = new JavaThread(true); 4089 4090 // Set correct safepoint info. The thread is going to call into Java when 4091 // initializing the Java level thread object. Hence, the correct state must 4092 // be set in order for the Safepoint code to deal with it correctly. 4093 thread->set_thread_state(_thread_in_vm); 4094 thread->record_stack_base_and_size(); 4095 thread->initialize_thread_current(); 4096 4097 if (!os::create_attached_thread(thread)) { 4098 delete thread; 4099 return JNI_ERR; 4100 } 4101 // Enable stack overflow checks 4102 thread->create_stack_guard_pages(); 4103 4104 thread->initialize_tlab(); 4105 4106 thread->cache_global_variables(); 4107 4108 // Crucial that we do not have a safepoint check for this thread, since it has 4109 // not been added to the Thread list yet. 4110 { Threads_lock->lock_without_safepoint_check(); 4111 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4112 // avoid this thread trying to do a GC before it is added to the thread-list 4113 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4114 Threads::add(thread, daemon); 4115 Threads_lock->unlock(); 4116 } 4117 // Create thread group and name info from attach arguments 4118 oop group = NULL; 4119 char* thread_name = NULL; 4120 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4121 group = JNIHandles::resolve(args->group); 4122 thread_name = args->name; // may be NULL 4123 } 4124 if (group == NULL) group = Universe::main_thread_group(); 4125 4126 // Create Java level thread object and attach it to this thread 4127 bool attach_failed = false; 4128 { 4129 EXCEPTION_MARK; 4130 HandleMark hm(THREAD); 4131 Handle thread_group(THREAD, group); 4132 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4133 if (HAS_PENDING_EXCEPTION) { 4134 CLEAR_PENDING_EXCEPTION; 4135 // cleanup outside the handle mark. 4136 attach_failed = true; 4137 } 4138 } 4139 4140 if (attach_failed) { 4141 // Added missing cleanup 4142 thread->cleanup_failed_attach_current_thread(); 4143 return JNI_ERR; 4144 } 4145 4146 // mark the thread as no longer attaching 4147 // this uses a fence to push the change through so we don't have 4148 // to regrab the threads_lock 4149 thread->set_done_attaching_via_jni(); 4150 4151 // Set java thread status. 4152 java_lang_Thread::set_thread_status(thread->threadObj(), 4153 java_lang_Thread::RUNNABLE); 4154 4155 // Notify the debugger 4156 if (JvmtiExport::should_post_thread_life()) { 4157 JvmtiExport::post_thread_start(thread); 4158 } 4159 4160 EventThreadStart event; 4161 if (event.should_commit()) { 4162 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4163 event.commit(); 4164 } 4165 4166 *(JNIEnv**)penv = thread->jni_environment(); 4167 4168 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4169 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4170 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4171 // needed. 4172 4173 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4174 4175 // Perform any platform dependent FPU setup 4176 os::setup_fpu(); 4177 4178 return JNI_OK; 4179 } 4180 4181 4182 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4183 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4184 if (!vm_created) { 4185 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4186 return JNI_ERR; 4187 } 4188 4189 JNIWrapper("AttachCurrentThread"); 4190 jint ret = attach_current_thread(vm, penv, _args, false); 4191 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4192 return ret; 4193 } 4194 4195 4196 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4197 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4198 VM_Exit::block_if_vm_exited(); 4199 4200 JNIWrapper("DetachCurrentThread"); 4201 4202 // If the thread has already been detached the operation is a no-op 4203 if (Thread::current_or_null() == NULL) { 4204 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4205 return JNI_OK; 4206 } 4207 4208 JavaThread* thread = JavaThread::current(); 4209 if (thread->has_last_Java_frame()) { 4210 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4211 // Can't detach a thread that's running java, that can't work. 4212 return JNI_ERR; 4213 } 4214 4215 // Safepoint support. Have to do call-back to safepoint code, if in the 4216 // middel of a safepoint operation 4217 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4218 4219 // XXX: Note that JavaThread::exit() call below removes the guards on the 4220 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4221 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4222 // of the guards is visible in jni_AttachCurrentThread above, 4223 // the removal of the guards is buried below in JavaThread::exit() 4224 // here. The abstraction should be more symmetrically either exposed 4225 // or hidden (e.g. it could probably be hidden in the same 4226 // (platform-dependent) methods where we do alternate stack 4227 // maintenance work?) 4228 thread->exit(false, JavaThread::jni_detach); 4229 delete thread; 4230 4231 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4232 return JNI_OK; 4233 } 4234 4235 DT_RETURN_MARK_DECL(GetEnv, jint 4236 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4237 4238 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4239 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4240 jint ret = JNI_ERR; 4241 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4242 4243 if (!vm_created) { 4244 *penv = NULL; 4245 ret = JNI_EDETACHED; 4246 return ret; 4247 } 4248 4249 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4250 return ret; 4251 } 4252 4253 #ifndef JVMPI_VERSION_1 4254 // need these in order to be polite about older agents 4255 #define JVMPI_VERSION_1 ((jint)0x10000001) 4256 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4257 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4258 #endif // !JVMPI_VERSION_1 4259 4260 Thread* thread = Thread::current_or_null(); 4261 if (thread != NULL && thread->is_Java_thread()) { 4262 if (Threads::is_supported_jni_version_including_1_1(version)) { 4263 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4264 ret = JNI_OK; 4265 return ret; 4266 4267 } else if (version == JVMPI_VERSION_1 || 4268 version == JVMPI_VERSION_1_1 || 4269 version == JVMPI_VERSION_1_2) { 4270 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4271 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4272 ret = JNI_EVERSION; 4273 return ret; 4274 } else if (JvmtiExport::is_jvmdi_version(version)) { 4275 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4276 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4277 ret = JNI_EVERSION; 4278 return ret; 4279 } else { 4280 *penv = NULL; 4281 ret = JNI_EVERSION; 4282 return ret; 4283 } 4284 } else { 4285 *penv = NULL; 4286 ret = JNI_EDETACHED; 4287 return ret; 4288 } 4289 } 4290 4291 4292 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4293 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4294 if (!vm_created) { 4295 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4296 return JNI_ERR; 4297 } 4298 4299 JNIWrapper("AttachCurrentThreadAsDaemon"); 4300 jint ret = attach_current_thread(vm, penv, _args, true); 4301 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4302 return ret; 4303 } 4304 4305 4306 } // End extern "C" 4307 4308 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4309 NULL, 4310 NULL, 4311 NULL, 4312 4313 jni_DestroyJavaVM, 4314 jni_AttachCurrentThread, 4315 jni_DetachCurrentThread, 4316 jni_GetEnv, 4317 jni_AttachCurrentThreadAsDaemon 4318 };