1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "ci/ciReplay.hpp" 28 #include "classfile/altHashing.hpp" 29 #include "classfile/classFileStream.hpp" 30 #include "classfile/classLoader.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/modules.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionary.hpp" 36 #include "classfile/vmSymbols.hpp" 37 #include "gc/shared/gcLocker.inline.hpp" 38 #include "interpreter/linkResolver.hpp" 39 #include "memory/allocation.hpp" 40 #include "memory/allocation.inline.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.inline.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceOop.hpp" 46 #include "oops/markOop.hpp" 47 #include "oops/method.hpp" 48 #include "oops/objArrayKlass.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayKlass.hpp" 53 #include "oops/typeArrayOop.hpp" 54 #include "prims/jni.h" 55 #include "prims/jniCheck.hpp" 56 #include "prims/jniExport.hpp" 57 #include "prims/jniFastGetField.hpp" 58 #include "prims/jvm.h" 59 #include "prims/jvm_misc.hpp" 60 #include "prims/jvmtiExport.hpp" 61 #include "prims/jvmtiThreadState.hpp" 62 #include "runtime/atomic.inline.hpp" 63 #include "runtime/compilationPolicy.hpp" 64 #include "runtime/fieldDescriptor.hpp" 65 #include "runtime/fprofiler.hpp" 66 #include "runtime/handles.inline.hpp" 67 #include "runtime/interfaceSupport.hpp" 68 #include "runtime/java.hpp" 69 #include "runtime/javaCalls.hpp" 70 #include "runtime/jfieldIDWorkaround.hpp" 71 #include "runtime/orderAccess.inline.hpp" 72 #include "runtime/reflection.hpp" 73 #include "runtime/sharedRuntime.hpp" 74 #include "runtime/signature.hpp" 75 #include "runtime/thread.inline.hpp" 76 #include "runtime/vm_operations.hpp" 77 #include "services/memTracker.hpp" 78 #include "services/runtimeService.hpp" 79 #include "trace/traceMacros.hpp" 80 #include "trace/tracing.hpp" 81 #include "utilities/defaultStream.hpp" 82 #include "utilities/dtrace.hpp" 83 #include "utilities/events.hpp" 84 #include "utilities/histogram.hpp" 85 #include "utilities/internalVMTests.hpp" 86 #include "utilities/macros.hpp" 87 #if INCLUDE_ALL_GCS 88 #include "gc/g1/g1SATBCardTableModRefBS.hpp" 89 #endif // INCLUDE_ALL_GCS 90 #if INCLUDE_JVMCI 91 #include "jvmci/jvmciCompiler.hpp" 92 #include "jvmci/jvmciRuntime.hpp" 93 #endif 94 95 static jint CurrentVersion = JNI_VERSION_9; 96 97 #ifdef _WIN32 98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 99 #endif 100 101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 102 // '-return' probe regardless of the return path is taken out of the function. 103 // Methods that have multiple return paths use this to avoid having to 104 // instrument each return path. Methods that use CHECK or THROW must use this 105 // since those macros can cause an immedate uninstrumented return. 106 // 107 // In order to get the return value, a reference to the variable containing 108 // the return value must be passed to the contructor of the object, and 109 // the return value must be set before return (since the mark object has 110 // a reference to it). 111 // 112 // Example: 113 // DT_RETURN_MARK_DECL(SomeFunc, int); 114 // JNI_ENTRY(int, SomeFunc, ...) 115 // int return_value = 0; 116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 117 // foo(CHECK_0) 118 // return_value = 5; 119 // return return_value; 120 // JNI_END 121 #define DT_RETURN_MARK_DECL(name, type, probe) \ 122 DTRACE_ONLY( \ 123 class DTraceReturnProbeMark_##name { \ 124 public: \ 125 const type& _ret_ref; \ 126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 127 ~DTraceReturnProbeMark_##name() { \ 128 probe; \ 129 } \ 130 } \ 131 ) 132 // Void functions are simpler since there's no return value 133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 134 DTRACE_ONLY( \ 135 class DTraceReturnProbeMark_##name { \ 136 public: \ 137 ~DTraceReturnProbeMark_##name() { \ 138 probe; \ 139 } \ 140 } \ 141 ) 142 143 // Place these macros in the function to mark the return. Non-void 144 // functions need the type and address of the return value. 145 #define DT_RETURN_MARK(name, type, ref) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 147 #define DT_VOID_RETURN_MARK(name) \ 148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 149 150 151 // Use these to select distinct code for floating-point vs. non-floating point 152 // situations. Used from within common macros where we need slightly 153 // different behavior for Float/Double 154 #define FP_SELECT_Boolean(intcode, fpcode) intcode 155 #define FP_SELECT_Byte(intcode, fpcode) intcode 156 #define FP_SELECT_Char(intcode, fpcode) intcode 157 #define FP_SELECT_Short(intcode, fpcode) intcode 158 #define FP_SELECT_Object(intcode, fpcode) intcode 159 #define FP_SELECT_Int(intcode, fpcode) intcode 160 #define FP_SELECT_Long(intcode, fpcode) intcode 161 #define FP_SELECT_Float(intcode, fpcode) fpcode 162 #define FP_SELECT_Double(intcode, fpcode) fpcode 163 #define FP_SELECT(TypeName, intcode, fpcode) \ 164 FP_SELECT_##TypeName(intcode, fpcode) 165 166 #define COMMA , 167 168 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 169 // (dtrace doesn't do FP yet) 170 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 171 FP_SELECT(TypeName, \ 172 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 173 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 174 FP_SELECT(TypeName, \ 175 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 176 177 178 // out-of-line helpers for class jfieldIDWorkaround: 179 180 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 181 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 182 uintptr_t as_uint = (uintptr_t) id; 183 intptr_t offset = raw_instance_offset(id); 184 if (is_checked_jfieldID(id)) { 185 if (!klass_hash_ok(k, id)) { 186 return false; 187 } 188 } 189 return InstanceKlass::cast(k)->contains_field_offset(offset); 190 } else { 191 JNIid* result = (JNIid*) id; 192 #ifdef ASSERT 193 return result != NULL && result->is_static_field_id(); 194 #else 195 return result != NULL; 196 #endif 197 } 198 } 199 200 201 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 202 if (offset <= small_offset_mask) { 203 Klass* field_klass = k; 204 Klass* super_klass = field_klass->super(); 205 // With compressed oops the most super class with nonstatic fields would 206 // be the owner of fields embedded in the header. 207 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 208 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 209 field_klass = super_klass; // super contains the field also 210 super_klass = field_klass->super(); 211 } 212 debug_only(NoSafepointVerifier nosafepoint;) 213 uintptr_t klass_hash = field_klass->identity_hash(); 214 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 215 } else { 216 #if 0 217 #ifndef PRODUCT 218 { 219 ResourceMark rm; 220 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 221 } 222 #endif 223 #endif 224 return 0; 225 } 226 } 227 228 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 229 uintptr_t as_uint = (uintptr_t) id; 230 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 231 do { 232 debug_only(NoSafepointVerifier nosafepoint;) 233 // Could use a non-blocking query for identity_hash here... 234 if ((k->identity_hash() & klass_mask) == klass_hash) 235 return true; 236 k = k->super(); 237 } while (k != NULL); 238 return false; 239 } 240 241 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 242 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 243 uintptr_t as_uint = (uintptr_t) id; 244 intptr_t offset = raw_instance_offset(id); 245 if (VerifyJNIFields) { 246 if (is_checked_jfieldID(id)) { 247 guarantee(klass_hash_ok(k, id), 248 "Bug in native code: jfieldID class must match object"); 249 } else { 250 #if 0 251 #ifndef PRODUCT 252 if (Verbose) { 253 ResourceMark rm; 254 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 255 } 256 #endif 257 #endif 258 } 259 } 260 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 261 "Bug in native code: jfieldID offset must address interior of object"); 262 } 263 264 // Wrapper to trace JNI functions 265 266 #ifdef ASSERT 267 Histogram* JNIHistogram; 268 static volatile jint JNIHistogram_lock = 0; 269 270 class JNIHistogramElement : public HistogramElement { 271 public: 272 JNIHistogramElement(const char* name); 273 }; 274 275 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 276 _name = elementName; 277 uintx count = 0; 278 279 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 280 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 281 count +=1; 282 if ( (WarnOnStalledSpinLock > 0) 283 && (count % WarnOnStalledSpinLock == 0)) { 284 warning("JNIHistogram_lock seems to be stalled"); 285 } 286 } 287 } 288 289 290 if(JNIHistogram == NULL) 291 JNIHistogram = new Histogram("JNI Call Counts",100); 292 293 JNIHistogram->add_element(this); 294 Atomic::dec(&JNIHistogram_lock); 295 } 296 297 #define JNICountWrapper(arg) \ 298 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 299 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 300 if (e != NULL) e->increment_count() 301 #define JNIWrapper(arg) JNICountWrapper(arg); 302 #else 303 #define JNIWrapper(arg) 304 #endif 305 306 307 // Implementation of JNI entries 308 309 DT_RETURN_MARK_DECL(DefineClass, jclass 310 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 311 312 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 313 const jbyte *buf, jsize bufLen)) 314 JNIWrapper("DefineClass"); 315 316 HOTSPOT_JNI_DEFINECLASS_ENTRY( 317 env, (char*) name, loaderRef, (char*) buf, bufLen); 318 319 jclass cls = NULL; 320 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 321 322 TempNewSymbol class_name = NULL; 323 // Since exceptions can be thrown, class initialization can take place 324 // if name is NULL no check for class name in .class stream has to be made. 325 if (name != NULL) { 326 const int str_len = (int)strlen(name); 327 if (str_len > Symbol::max_length()) { 328 // It's impossible to create this class; the name cannot fit 329 // into the constant pool. 330 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 331 } 332 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 333 } 334 ResourceMark rm(THREAD); 335 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 336 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 337 338 if (UsePerfData && !class_loader.is_null()) { 339 // check whether the current caller thread holds the lock or not. 340 // If not, increment the corresponding counter 341 if (ObjectSynchronizer:: 342 query_lock_ownership((JavaThread*)THREAD, class_loader) != 343 ObjectSynchronizer::owner_self) { 344 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 345 } 346 } 347 Klass* k = SystemDictionary::resolve_from_stream(class_name, 348 class_loader, 349 Handle(), 350 &st, 351 CHECK_NULL); 352 353 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 354 trace_class_resolution(k); 355 } 356 357 cls = (jclass)JNIHandles::make_local( 358 env, k->java_mirror()); 359 return cls; 360 JNI_END 361 362 363 364 static bool first_time_FindClass = true; 365 366 DT_RETURN_MARK_DECL(FindClass, jclass 367 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 368 369 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 370 JNIWrapper("FindClass"); 371 372 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 373 374 jclass result = NULL; 375 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 376 377 // Remember if we are the first invocation of jni_FindClass 378 bool first_time = first_time_FindClass; 379 first_time_FindClass = false; 380 381 // Sanity check the name: it cannot be null or larger than the maximum size 382 // name we can fit in the constant pool. 383 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 384 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 385 } 386 387 //%note jni_3 388 Handle loader; 389 Handle protection_domain; 390 // Find calling class 391 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 392 if (k.not_null()) { 393 loader = Handle(THREAD, k->class_loader()); 394 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 395 // in the correct class context. 396 if (loader.is_null() && 397 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 398 JavaValue result(T_OBJECT); 399 JavaCalls::call_static(&result, k, 400 vmSymbols::getFromClass_name(), 401 vmSymbols::void_class_signature(), 402 thread); 403 if (HAS_PENDING_EXCEPTION) { 404 Handle ex(thread, thread->pending_exception()); 405 CLEAR_PENDING_EXCEPTION; 406 THROW_HANDLE_0(ex); 407 } 408 oop mirror = (oop) result.get_jobject(); 409 loader = Handle(THREAD, 410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 411 protection_domain = Handle(THREAD, 412 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 413 } 414 } else { 415 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 416 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 417 } 418 419 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 420 result = find_class_from_class_loader(env, sym, true, loader, 421 protection_domain, true, thread); 422 423 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 424 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 425 } 426 427 // If we were the first invocation of jni_FindClass, we enable compilation again 428 // rather than just allowing invocation counter to overflow and decay. 429 // Controlled by flag DelayCompilationDuringStartup. 430 if (first_time && !CompileTheWorld) 431 CompilationPolicy::completed_vm_startup(); 432 433 return result; 434 JNI_END 435 436 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 437 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 438 439 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 440 JNIWrapper("FromReflectedMethod"); 441 442 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 443 444 jmethodID ret = NULL; 445 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 446 447 // method is a handle to a java.lang.reflect.Method object 448 oop reflected = JNIHandles::resolve_non_null(method); 449 oop mirror = NULL; 450 int slot = 0; 451 452 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 453 mirror = java_lang_reflect_Constructor::clazz(reflected); 454 slot = java_lang_reflect_Constructor::slot(reflected); 455 } else { 456 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 457 mirror = java_lang_reflect_Method::clazz(reflected); 458 slot = java_lang_reflect_Method::slot(reflected); 459 } 460 Klass* k = java_lang_Class::as_Klass(mirror); 461 462 KlassHandle k1(THREAD, k); 463 // Make sure class is initialized before handing id's out to methods 464 k1()->initialize(CHECK_NULL); 465 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 466 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 467 return ret; 468 JNI_END 469 470 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 471 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 472 473 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 474 JNIWrapper("FromReflectedField"); 475 476 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 477 478 jfieldID ret = NULL; 479 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 480 481 // field is a handle to a java.lang.reflect.Field object 482 oop reflected = JNIHandles::resolve_non_null(field); 483 oop mirror = java_lang_reflect_Field::clazz(reflected); 484 Klass* k = java_lang_Class::as_Klass(mirror); 485 int slot = java_lang_reflect_Field::slot(reflected); 486 int modifiers = java_lang_reflect_Field::modifiers(reflected); 487 488 KlassHandle k1(THREAD, k); 489 // Make sure class is initialized before handing id's out to fields 490 k1()->initialize(CHECK_NULL); 491 492 // First check if this is a static field 493 if (modifiers & JVM_ACC_STATIC) { 494 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 495 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 496 assert(id != NULL, "corrupt Field object"); 497 debug_only(id->set_is_static_field_id();) 498 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 499 ret = jfieldIDWorkaround::to_static_jfieldID(id); 500 return ret; 501 } 502 503 // The slot is the index of the field description in the field-array 504 // The jfieldID is the offset of the field within the object 505 // It may also have hash bits for k, if VerifyJNIFields is turned on. 506 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 507 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 508 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 509 return ret; 510 JNI_END 511 512 513 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 514 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 515 516 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 517 JNIWrapper("ToReflectedMethod"); 518 519 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 520 521 jobject ret = NULL; 522 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 523 524 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 525 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 526 oop reflection_method; 527 if (m->is_initializer()) { 528 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 529 } else { 530 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 531 } 532 ret = JNIHandles::make_local(env, reflection_method); 533 return ret; 534 JNI_END 535 536 DT_RETURN_MARK_DECL(GetSuperclass, jclass 537 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 538 539 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 540 JNIWrapper("GetSuperclass"); 541 542 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 543 544 jclass obj = NULL; 545 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 546 547 oop mirror = JNIHandles::resolve_non_null(sub); 548 // primitive classes return NULL 549 if (java_lang_Class::is_primitive(mirror)) return NULL; 550 551 // Rules of Class.getSuperClass as implemented by KLass::java_super: 552 // arrays return Object 553 // interfaces return NULL 554 // proper classes return Klass::super() 555 Klass* k = java_lang_Class::as_Klass(mirror); 556 if (k->is_interface()) return NULL; 557 558 // return mirror for superclass 559 Klass* super = k->java_super(); 560 // super2 is the value computed by the compiler's getSuperClass intrinsic: 561 debug_only(Klass* super2 = ( k->is_array_klass() 562 ? SystemDictionary::Object_klass() 563 : k->super() ) ); 564 assert(super == super2, 565 "java_super computation depends on interface, array, other super"); 566 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 567 return obj; 568 JNI_END 569 570 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 571 JNIWrapper("IsSubclassOf"); 572 573 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 574 575 oop sub_mirror = JNIHandles::resolve_non_null(sub); 576 oop super_mirror = JNIHandles::resolve_non_null(super); 577 if (java_lang_Class::is_primitive(sub_mirror) || 578 java_lang_Class::is_primitive(super_mirror)) { 579 jboolean ret = (sub_mirror == super_mirror); 580 581 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 582 return ret; 583 } 584 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 585 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 586 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 587 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 588 JNI_TRUE : JNI_FALSE; 589 590 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 591 return ret; 592 JNI_END 593 594 595 DT_RETURN_MARK_DECL(Throw, jint 596 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 597 598 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 599 JNIWrapper("Throw"); 600 601 HOTSPOT_JNI_THROW_ENTRY(env, obj); 602 603 jint ret = JNI_OK; 604 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 605 606 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 607 ShouldNotReachHere(); 608 return 0; // Mute compiler. 609 JNI_END 610 611 612 DT_RETURN_MARK_DECL(ThrowNew, jint 613 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 614 615 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 616 JNIWrapper("ThrowNew"); 617 618 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 619 620 jint ret = JNI_OK; 621 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 622 623 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 624 Symbol* name = k->name(); 625 Handle class_loader (THREAD, k->class_loader()); 626 Handle protection_domain (THREAD, k->protection_domain()); 627 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 628 ShouldNotReachHere(); 629 return 0; // Mute compiler. 630 JNI_END 631 632 633 // JNI functions only transform a pending async exception to a synchronous 634 // exception in ExceptionOccurred and ExceptionCheck calls, since 635 // delivering an async exception in other places won't change the native 636 // code's control flow and would be harmful when native code further calls 637 // JNI functions with a pending exception. Async exception is also checked 638 // during the call, so ExceptionOccurred/ExceptionCheck won't return 639 // false but deliver the async exception at the very end during 640 // state transition. 641 642 static void jni_check_async_exceptions(JavaThread *thread) { 643 assert(thread == Thread::current(), "must be itself"); 644 thread->check_and_handle_async_exceptions(); 645 } 646 647 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 648 JNIWrapper("ExceptionOccurred"); 649 650 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 651 652 jni_check_async_exceptions(thread); 653 oop exception = thread->pending_exception(); 654 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 655 656 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 657 return ret; 658 JNI_END 659 660 661 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 662 JNIWrapper("ExceptionDescribe"); 663 664 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 665 666 if (thread->has_pending_exception()) { 667 Handle ex(thread, thread->pending_exception()); 668 thread->clear_pending_exception(); 669 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 670 // Don't print anything if we are being killed. 671 } else { 672 jio_fprintf(defaultStream::error_stream(), "Exception "); 673 if (thread != NULL && thread->threadObj() != NULL) { 674 ResourceMark rm(THREAD); 675 jio_fprintf(defaultStream::error_stream(), 676 "in thread \"%s\" ", thread->get_thread_name()); 677 } 678 if (ex->is_a(SystemDictionary::Throwable_klass())) { 679 JavaValue result(T_VOID); 680 JavaCalls::call_virtual(&result, 681 ex, 682 KlassHandle(THREAD, 683 SystemDictionary::Throwable_klass()), 684 vmSymbols::printStackTrace_name(), 685 vmSymbols::void_method_signature(), 686 THREAD); 687 // If an exception is thrown in the call it gets thrown away. Not much 688 // we can do with it. The native code that calls this, does not check 689 // for the exception - hence, it might still be in the thread when DestroyVM gets 690 // called, potentially causing a few asserts to trigger - since no pending exception 691 // is expected. 692 CLEAR_PENDING_EXCEPTION; 693 } else { 694 ResourceMark rm(THREAD); 695 jio_fprintf(defaultStream::error_stream(), 696 ". Uncaught exception of type %s.", 697 ex->klass()->external_name()); 698 } 699 } 700 } 701 702 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 703 JNI_END 704 705 706 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 707 JNIWrapper("ExceptionClear"); 708 709 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 710 711 // The jni code might be using this API to clear java thrown exception. 712 // So just mark jvmti thread exception state as exception caught. 713 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 714 if (state != NULL && state->is_exception_detected()) { 715 state->set_exception_caught(); 716 } 717 thread->clear_pending_exception(); 718 719 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 720 JNI_END 721 722 723 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 724 JNIWrapper("FatalError"); 725 726 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 727 728 tty->print_cr("FATAL ERROR in native method: %s", msg); 729 thread->print_stack(); 730 os::abort(); // Dump core and abort 731 JNI_END 732 733 734 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 735 JNIWrapper("PushLocalFrame"); 736 737 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 738 739 //%note jni_11 740 if (capacity < 0 || 741 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 742 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 743 return JNI_ERR; 744 } 745 JNIHandleBlock* old_handles = thread->active_handles(); 746 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 747 assert(new_handles != NULL, "should not be NULL"); 748 new_handles->set_pop_frame_link(old_handles); 749 thread->set_active_handles(new_handles); 750 jint ret = JNI_OK; 751 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 752 return ret; 753 JNI_END 754 755 756 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 757 JNIWrapper("PopLocalFrame"); 758 759 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 760 761 //%note jni_11 762 Handle result_handle(thread, JNIHandles::resolve(result)); 763 JNIHandleBlock* old_handles = thread->active_handles(); 764 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 765 if (new_handles != NULL) { 766 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 767 // This way code will still work if PopLocalFrame is called without a corresponding 768 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 769 // the release_block call will release the blocks. 770 thread->set_active_handles(new_handles); 771 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 772 JNIHandleBlock::release_block(old_handles, thread); // may block 773 result = JNIHandles::make_local(thread, result_handle()); 774 } 775 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 776 return result; 777 JNI_END 778 779 780 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 781 JNIWrapper("NewGlobalRef"); 782 783 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 784 785 Handle ref_handle(thread, JNIHandles::resolve(ref)); 786 jobject ret = JNIHandles::make_global(ref_handle); 787 788 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 789 return ret; 790 JNI_END 791 792 // Must be JNI_ENTRY (with HandleMark) 793 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 794 JNIWrapper("DeleteGlobalRef"); 795 796 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 797 798 JNIHandles::destroy_global(ref); 799 800 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 801 JNI_END 802 803 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 804 JNIWrapper("DeleteLocalRef"); 805 806 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 807 808 JNIHandles::destroy_local(obj); 809 810 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 811 JNI_END 812 813 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 814 JNIWrapper("IsSameObject"); 815 816 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 817 818 oop a = JNIHandles::resolve(r1); 819 oop b = JNIHandles::resolve(r2); 820 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 821 822 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 823 return ret; 824 JNI_END 825 826 827 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 828 JNIWrapper("NewLocalRef"); 829 830 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 831 832 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 833 834 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 835 return ret; 836 JNI_END 837 838 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 839 JNIWrapper("EnsureLocalCapacity"); 840 841 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 842 843 jint ret; 844 if (capacity >= 0 && 845 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 846 ret = JNI_OK; 847 } else { 848 ret = JNI_ERR; 849 } 850 851 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 852 return ret; 853 JNI_END 854 855 // Return the Handle Type 856 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 857 JNIWrapper("GetObjectRefType"); 858 859 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 860 861 jobjectRefType ret; 862 if (JNIHandles::is_local_handle(thread, obj) || 863 JNIHandles::is_frame_handle(thread, obj)) 864 ret = JNILocalRefType; 865 else if (JNIHandles::is_global_handle(obj)) 866 ret = JNIGlobalRefType; 867 else if (JNIHandles::is_weak_global_handle(obj)) 868 ret = JNIWeakGlobalRefType; 869 else 870 ret = JNIInvalidRefType; 871 872 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 873 return ret; 874 JNI_END 875 876 877 class JNI_ArgumentPusher : public SignatureIterator { 878 protected: 879 JavaCallArguments* _arguments; 880 881 virtual void get_bool () = 0; 882 virtual void get_char () = 0; 883 virtual void get_short () = 0; 884 virtual void get_byte () = 0; 885 virtual void get_int () = 0; 886 virtual void get_long () = 0; 887 virtual void get_float () = 0; 888 virtual void get_double () = 0; 889 virtual void get_object () = 0; 890 891 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 892 this->_return_type = T_ILLEGAL; 893 _arguments = NULL; 894 } 895 896 public: 897 virtual void iterate( uint64_t fingerprint ) = 0; 898 899 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 900 901 inline void do_bool() { if (!is_return_type()) get_bool(); } 902 inline void do_char() { if (!is_return_type()) get_char(); } 903 inline void do_short() { if (!is_return_type()) get_short(); } 904 inline void do_byte() { if (!is_return_type()) get_byte(); } 905 inline void do_int() { if (!is_return_type()) get_int(); } 906 inline void do_long() { if (!is_return_type()) get_long(); } 907 inline void do_float() { if (!is_return_type()) get_float(); } 908 inline void do_double() { if (!is_return_type()) get_double(); } 909 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 910 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 911 inline void do_void() { } 912 913 JavaCallArguments* arguments() { return _arguments; } 914 void push_receiver(Handle h) { _arguments->push_oop(h); } 915 }; 916 917 918 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 919 protected: 920 va_list _ap; 921 922 inline void get_bool() { 923 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 924 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 925 // TemplateInterpreterGenerator::generate_result_handler_for and 926 // SharedRuntime::generate_native_wrapper. 927 jboolean b = va_arg(_ap, jint); 928 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 929 } 930 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 931 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 932 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 933 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 934 935 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 936 937 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 938 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 939 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 940 inline void get_object() { jobject l = va_arg(_ap, jobject); 941 _arguments->push_oop(Handle((oop *)l, false)); } 942 943 inline void set_ap(va_list rap) { 944 va_copy(_ap, rap); 945 } 946 947 public: 948 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 949 : JNI_ArgumentPusher(signature) { 950 set_ap(rap); 951 } 952 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 953 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 954 set_ap(rap); 955 } 956 957 // Optimized path if we have the bitvector form of signature 958 void iterate( uint64_t fingerprint ) { 959 if (fingerprint == (uint64_t)CONST64(-1)) { 960 SignatureIterator::iterate(); // Must be too many arguments 961 } else { 962 _return_type = (BasicType)((fingerprint >> static_feature_size) & 963 result_feature_mask); 964 965 assert(fingerprint, "Fingerprint should not be 0"); 966 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 967 while ( 1 ) { 968 switch ( fingerprint & parameter_feature_mask ) { 969 case bool_parm: 970 get_bool(); 971 break; 972 case char_parm: 973 get_char(); 974 break; 975 case short_parm: 976 get_short(); 977 break; 978 case byte_parm: 979 get_byte(); 980 break; 981 case int_parm: 982 get_int(); 983 break; 984 case obj_parm: 985 get_object(); 986 break; 987 case long_parm: 988 get_long(); 989 break; 990 case float_parm: 991 get_float(); 992 break; 993 case double_parm: 994 get_double(); 995 break; 996 case done_parm: 997 return; 998 break; 999 default: 1000 ShouldNotReachHere(); 1001 break; 1002 } 1003 fingerprint >>= parameter_feature_size; 1004 } 1005 } 1006 } 1007 }; 1008 1009 1010 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1011 protected: 1012 const jvalue *_ap; 1013 1014 inline void get_bool() { 1015 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1016 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1017 // TemplateInterpreterGenerator::generate_result_handler_for and 1018 // SharedRuntime::generate_native_wrapper. 1019 jboolean b = (_ap++)->z; 1020 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1021 } 1022 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1023 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1024 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1025 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1026 1027 inline void get_long() { _arguments->push_long((_ap++)->j); } 1028 inline void get_float() { _arguments->push_float((_ap++)->f); } 1029 inline void get_double() { _arguments->push_double((_ap++)->d);} 1030 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1031 1032 inline void set_ap(const jvalue *rap) { _ap = rap; } 1033 1034 public: 1035 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1036 : JNI_ArgumentPusher(signature) { 1037 set_ap(rap); 1038 } 1039 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1040 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1041 set_ap(rap); 1042 } 1043 1044 // Optimized path if we have the bitvector form of signature 1045 void iterate( uint64_t fingerprint ) { 1046 if (fingerprint == (uint64_t)CONST64(-1)) { 1047 SignatureIterator::iterate(); // Must be too many arguments 1048 } else { 1049 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1050 result_feature_mask); 1051 assert(fingerprint, "Fingerprint should not be 0"); 1052 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1053 while ( 1 ) { 1054 switch ( fingerprint & parameter_feature_mask ) { 1055 case bool_parm: 1056 get_bool(); 1057 break; 1058 case char_parm: 1059 get_char(); 1060 break; 1061 case short_parm: 1062 get_short(); 1063 break; 1064 case byte_parm: 1065 get_byte(); 1066 break; 1067 case int_parm: 1068 get_int(); 1069 break; 1070 case obj_parm: 1071 get_object(); 1072 break; 1073 case long_parm: 1074 get_long(); 1075 break; 1076 case float_parm: 1077 get_float(); 1078 break; 1079 case double_parm: 1080 get_double(); 1081 break; 1082 case done_parm: 1083 return; 1084 break; 1085 default: 1086 ShouldNotReachHere(); 1087 break; 1088 } 1089 fingerprint >>= parameter_feature_size; 1090 } 1091 } 1092 } 1093 }; 1094 1095 1096 enum JNICallType { 1097 JNI_STATIC, 1098 JNI_VIRTUAL, 1099 JNI_NONVIRTUAL 1100 }; 1101 1102 1103 1104 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1105 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1106 1107 // Create object to hold arguments for the JavaCall, and associate it with 1108 // the jni parser 1109 ResourceMark rm(THREAD); 1110 int number_of_parameters = method->size_of_parameters(); 1111 JavaCallArguments java_args(number_of_parameters); 1112 args->set_java_argument_object(&java_args); 1113 1114 assert(method->is_static(), "method should be static"); 1115 1116 // Fill out JavaCallArguments object 1117 args->iterate( Fingerprinter(method).fingerprint() ); 1118 // Initialize result type 1119 result->set_type(args->get_ret_type()); 1120 1121 // Invoke the method. Result is returned as oop. 1122 JavaCalls::call(result, method, &java_args, CHECK); 1123 1124 // Convert result 1125 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1126 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1127 } 1128 } 1129 1130 1131 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1132 oop recv = JNIHandles::resolve(receiver); 1133 if (recv == NULL) { 1134 THROW(vmSymbols::java_lang_NullPointerException()); 1135 } 1136 Handle h_recv(THREAD, recv); 1137 1138 int number_of_parameters; 1139 Method* selected_method; 1140 { 1141 Method* m = Method::resolve_jmethod_id(method_id); 1142 number_of_parameters = m->size_of_parameters(); 1143 Klass* holder = m->method_holder(); 1144 if (call_type != JNI_VIRTUAL) { 1145 selected_method = m; 1146 } else if (!m->has_itable_index()) { 1147 // non-interface call -- for that little speed boost, don't handlize 1148 debug_only(NoSafepointVerifier nosafepoint;) 1149 // jni_GetMethodID makes sure class is linked and initialized 1150 // so m should have a valid vtable index. 1151 assert(m->valid_vtable_index(), "no valid vtable index"); 1152 int vtbl_index = m->vtable_index(); 1153 if (vtbl_index != Method::nonvirtual_vtable_index) { 1154 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1155 } else { 1156 // final method 1157 selected_method = m; 1158 } 1159 } else { 1160 // interface call 1161 KlassHandle h_holder(THREAD, holder); 1162 1163 int itbl_index = m->itable_index(); 1164 Klass* k = h_recv->klass(); 1165 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1166 } 1167 } 1168 1169 methodHandle method(THREAD, selected_method); 1170 1171 // Create object to hold arguments for the JavaCall, and associate it with 1172 // the jni parser 1173 ResourceMark rm(THREAD); 1174 JavaCallArguments java_args(number_of_parameters); 1175 args->set_java_argument_object(&java_args); 1176 1177 // handle arguments 1178 assert(!method->is_static(), "method should not be static"); 1179 args->push_receiver(h_recv); // Push jobject handle 1180 1181 // Fill out JavaCallArguments object 1182 args->iterate( Fingerprinter(method).fingerprint() ); 1183 // Initialize result type 1184 result->set_type(args->get_ret_type()); 1185 1186 // Invoke the method. Result is returned as oop. 1187 JavaCalls::call(result, method, &java_args, CHECK); 1188 1189 // Convert result 1190 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1191 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1192 } 1193 } 1194 1195 1196 static instanceOop alloc_object(jclass clazz, TRAPS) { 1197 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1198 if (k == NULL) { 1199 ResourceMark rm(THREAD); 1200 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1201 } 1202 k()->check_valid_for_instantiation(false, CHECK_NULL); 1203 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1204 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1205 return ih; 1206 } 1207 1208 DT_RETURN_MARK_DECL(AllocObject, jobject 1209 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1210 1211 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1212 JNIWrapper("AllocObject"); 1213 1214 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1215 1216 jobject ret = NULL; 1217 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1218 1219 instanceOop i = alloc_object(clazz, CHECK_NULL); 1220 ret = JNIHandles::make_local(env, i); 1221 return ret; 1222 JNI_END 1223 1224 DT_RETURN_MARK_DECL(NewObjectA, jobject 1225 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1226 1227 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1228 JNIWrapper("NewObjectA"); 1229 1230 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1231 1232 jobject obj = NULL; 1233 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1234 1235 instanceOop i = alloc_object(clazz, CHECK_NULL); 1236 obj = JNIHandles::make_local(env, i); 1237 JavaValue jvalue(T_VOID); 1238 JNI_ArgumentPusherArray ap(methodID, args); 1239 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1240 return obj; 1241 JNI_END 1242 1243 1244 DT_RETURN_MARK_DECL(NewObjectV, jobject 1245 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1246 1247 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1248 JNIWrapper("NewObjectV"); 1249 1250 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1251 1252 jobject obj = NULL; 1253 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1254 1255 instanceOop i = alloc_object(clazz, CHECK_NULL); 1256 obj = JNIHandles::make_local(env, i); 1257 JavaValue jvalue(T_VOID); 1258 JNI_ArgumentPusherVaArg ap(methodID, args); 1259 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1260 return obj; 1261 JNI_END 1262 1263 1264 DT_RETURN_MARK_DECL(NewObject, jobject 1265 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1266 1267 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1268 JNIWrapper("NewObject"); 1269 1270 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1271 1272 jobject obj = NULL; 1273 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1274 1275 instanceOop i = alloc_object(clazz, CHECK_NULL); 1276 obj = JNIHandles::make_local(env, i); 1277 va_list args; 1278 va_start(args, methodID); 1279 JavaValue jvalue(T_VOID); 1280 JNI_ArgumentPusherVaArg ap(methodID, args); 1281 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1282 va_end(args); 1283 return obj; 1284 JNI_END 1285 1286 1287 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1288 JNIWrapper("GetObjectClass"); 1289 1290 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1291 1292 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1293 jclass ret = 1294 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1295 1296 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1297 return ret; 1298 JNI_END 1299 1300 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1301 JNIWrapper("IsInstanceOf"); 1302 1303 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1304 1305 jboolean ret = JNI_TRUE; 1306 if (obj != NULL) { 1307 ret = JNI_FALSE; 1308 Klass* k = java_lang_Class::as_Klass( 1309 JNIHandles::resolve_non_null(clazz)); 1310 if (k != NULL) { 1311 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1312 } 1313 } 1314 1315 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1316 return ret; 1317 JNI_END 1318 1319 1320 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1321 const char *sig, bool is_static, TRAPS) { 1322 // %%%% This code should probably just call into a method in the LinkResolver 1323 // 1324 // The class should have been loaded (we have an instance of the class 1325 // passed in) so the method and signature should already be in the symbol 1326 // table. If they're not there, the method doesn't exist. 1327 const char *name_to_probe = (name_str == NULL) 1328 ? vmSymbols::object_initializer_name()->as_C_string() 1329 : name_str; 1330 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1331 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1332 1333 if (name == NULL || signature == NULL) { 1334 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1335 } 1336 1337 // Throw a NoSuchMethodError exception if we have an instance of a 1338 // primitive java.lang.Class 1339 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1340 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1341 } 1342 1343 KlassHandle klass(THREAD, 1344 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1345 1346 // Make sure class is linked and initialized before handing id's out to 1347 // Method*s. 1348 klass()->initialize(CHECK_NULL); 1349 1350 Method* m; 1351 if (name == vmSymbols::object_initializer_name() || 1352 name == vmSymbols::class_initializer_name()) { 1353 // Never search superclasses for constructors 1354 if (klass->is_instance_klass()) { 1355 m = InstanceKlass::cast(klass())->find_method(name, signature); 1356 } else { 1357 m = NULL; 1358 } 1359 } else { 1360 m = klass->lookup_method(name, signature); 1361 if (m == NULL && klass->is_instance_klass()) { 1362 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1363 } 1364 } 1365 if (m == NULL || (m->is_static() != is_static)) { 1366 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1367 } 1368 return m->jmethod_id(); 1369 } 1370 1371 1372 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1373 const char *name, const char *sig)) 1374 JNIWrapper("GetMethodID"); 1375 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1376 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1377 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1378 return ret; 1379 JNI_END 1380 1381 1382 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1383 const char *name, const char *sig)) 1384 JNIWrapper("GetStaticMethodID"); 1385 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1386 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1387 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1388 return ret; 1389 JNI_END 1390 1391 1392 1393 // 1394 // Calling Methods 1395 // 1396 1397 1398 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1399 , EntryProbe, ReturnProbe) \ 1400 \ 1401 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1402 , ReturnProbe); \ 1403 \ 1404 JNI_ENTRY(ResultType, \ 1405 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1406 JNIWrapper("Call" XSTR(Result) "Method"); \ 1407 \ 1408 EntryProbe; \ 1409 ResultType ret = 0;\ 1410 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1411 (const ResultType&)ret);\ 1412 \ 1413 va_list args; \ 1414 va_start(args, methodID); \ 1415 JavaValue jvalue(Tag); \ 1416 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1417 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1418 va_end(args); \ 1419 ret = jvalue.get_##ResultType(); \ 1420 return ret;\ 1421 JNI_END 1422 1423 // the runtime type of subword integral basic types is integer 1424 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1425 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1426 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1427 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1428 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1429 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1430 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1431 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1432 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1433 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1434 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1435 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1436 1437 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1438 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1439 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1440 DEFINE_CALLMETHOD(jint, Int, T_INT, 1441 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1442 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1443 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1444 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1445 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1446 // Float and double probes don't return value because dtrace doesn't currently support it 1447 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1448 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1449 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1450 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1451 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1452 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1453 1454 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1455 , EntryProbe, ReturnProbe) \ 1456 \ 1457 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1458 , ReturnProbe); \ 1459 \ 1460 JNI_ENTRY(ResultType, \ 1461 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1462 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1463 \ 1464 EntryProbe;\ 1465 ResultType ret = 0;\ 1466 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1467 (const ResultType&)ret);\ 1468 \ 1469 JavaValue jvalue(Tag); \ 1470 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1471 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1472 ret = jvalue.get_##ResultType(); \ 1473 return ret;\ 1474 JNI_END 1475 1476 // the runtime type of subword integral basic types is integer 1477 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1478 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1480 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1481 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1482 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1483 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1484 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1485 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1486 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1487 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1488 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1489 1490 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1491 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1492 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1493 DEFINE_CALLMETHODV(jint, Int, T_INT, 1494 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1495 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1496 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1497 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1498 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1499 // Float and double probes don't return value because dtrace doesn't currently support it 1500 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1501 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1502 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1503 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1504 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1505 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1506 1507 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1508 , EntryProbe, ReturnProbe) \ 1509 \ 1510 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1511 , ReturnProbe); \ 1512 \ 1513 JNI_ENTRY(ResultType, \ 1514 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1515 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1516 EntryProbe; \ 1517 ResultType ret = 0;\ 1518 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1519 (const ResultType&)ret);\ 1520 \ 1521 JavaValue jvalue(Tag); \ 1522 JNI_ArgumentPusherArray ap(methodID, args); \ 1523 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1524 ret = jvalue.get_##ResultType(); \ 1525 return ret;\ 1526 JNI_END 1527 1528 // the runtime type of subword integral basic types is integer 1529 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1530 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1531 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1532 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1533 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1534 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1535 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1536 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1537 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1538 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1539 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1540 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1541 1542 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1543 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1544 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1545 DEFINE_CALLMETHODA(jint, Int, T_INT, 1546 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1547 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1548 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1549 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1550 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1551 // Float and double probes don't return value because dtrace doesn't currently support it 1552 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1553 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1554 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1555 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1556 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1557 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1558 1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1560 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1561 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1562 1563 1564 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1565 JNIWrapper("CallVoidMethod"); 1566 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1567 DT_VOID_RETURN_MARK(CallVoidMethod); 1568 1569 va_list args; 1570 va_start(args, methodID); 1571 JavaValue jvalue(T_VOID); 1572 JNI_ArgumentPusherVaArg ap(methodID, args); 1573 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1574 va_end(args); 1575 JNI_END 1576 1577 1578 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1579 JNIWrapper("CallVoidMethodV"); 1580 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1581 DT_VOID_RETURN_MARK(CallVoidMethodV); 1582 1583 JavaValue jvalue(T_VOID); 1584 JNI_ArgumentPusherVaArg ap(methodID, args); 1585 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1586 JNI_END 1587 1588 1589 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1590 JNIWrapper("CallVoidMethodA"); 1591 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1592 DT_VOID_RETURN_MARK(CallVoidMethodA); 1593 1594 JavaValue jvalue(T_VOID); 1595 JNI_ArgumentPusherArray ap(methodID, args); 1596 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1597 JNI_END 1598 1599 1600 1601 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1602 , EntryProbe, ReturnProbe) \ 1603 \ 1604 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1605 , ReturnProbe);\ 1606 \ 1607 JNI_ENTRY(ResultType, \ 1608 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1609 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1610 \ 1611 EntryProbe;\ 1612 ResultType ret;\ 1613 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1614 (const ResultType&)ret);\ 1615 \ 1616 va_list args; \ 1617 va_start(args, methodID); \ 1618 JavaValue jvalue(Tag); \ 1619 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1620 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1621 va_end(args); \ 1622 ret = jvalue.get_##ResultType(); \ 1623 return ret;\ 1624 JNI_END 1625 1626 // the runtime type of subword integral basic types is integer 1627 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1628 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1629 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1630 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1631 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1632 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1633 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1634 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1635 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1636 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1637 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1638 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1639 1640 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1641 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1642 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1643 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1644 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1645 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1646 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1647 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1648 // Float and double probes don't return value because dtrace doesn't currently support it 1649 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1650 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1651 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1652 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1653 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1654 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1655 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1656 1657 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1658 , EntryProbe, ReturnProbe) \ 1659 \ 1660 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1661 , ReturnProbe);\ 1662 \ 1663 JNI_ENTRY(ResultType, \ 1664 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1665 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1666 \ 1667 EntryProbe;\ 1668 ResultType ret;\ 1669 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1670 (const ResultType&)ret);\ 1671 \ 1672 JavaValue jvalue(Tag); \ 1673 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1674 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1675 ret = jvalue.get_##ResultType(); \ 1676 return ret;\ 1677 JNI_END 1678 1679 // the runtime type of subword integral basic types is integer 1680 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1681 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1683 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1684 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1685 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1686 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1687 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1689 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1690 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1691 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1692 1693 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1694 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1695 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1696 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1697 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1698 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1699 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1700 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1701 // Float and double probes don't return value because dtrace doesn't currently support it 1702 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1703 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1704 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1705 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1706 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1707 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1708 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1709 1710 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1711 , EntryProbe, ReturnProbe) \ 1712 \ 1713 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1714 , ReturnProbe);\ 1715 \ 1716 JNI_ENTRY(ResultType, \ 1717 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1718 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1719 \ 1720 EntryProbe;\ 1721 ResultType ret;\ 1722 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1723 (const ResultType&)ret);\ 1724 \ 1725 JavaValue jvalue(Tag); \ 1726 JNI_ArgumentPusherArray ap(methodID, args); \ 1727 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1728 ret = jvalue.get_##ResultType(); \ 1729 return ret;\ 1730 JNI_END 1731 1732 // the runtime type of subword integral basic types is integer 1733 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1734 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1735 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1736 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1737 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1738 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1739 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1740 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1741 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1742 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1743 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1744 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1745 1746 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1747 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1748 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1749 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1750 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1751 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1752 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1753 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1754 // Float and double probes don't return value because dtrace doesn't currently support it 1755 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1756 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1757 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1758 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1759 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1760 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1761 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1762 1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1767 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1768 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1769 1770 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1771 JNIWrapper("CallNonvirtualVoidMethod"); 1772 1773 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1774 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1775 1776 va_list args; 1777 va_start(args, methodID); 1778 JavaValue jvalue(T_VOID); 1779 JNI_ArgumentPusherVaArg ap(methodID, args); 1780 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1781 va_end(args); 1782 JNI_END 1783 1784 1785 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1786 JNIWrapper("CallNonvirtualVoidMethodV"); 1787 1788 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1789 env, obj, cls, (uintptr_t) methodID); 1790 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1791 1792 JavaValue jvalue(T_VOID); 1793 JNI_ArgumentPusherVaArg ap(methodID, args); 1794 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1795 JNI_END 1796 1797 1798 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1799 JNIWrapper("CallNonvirtualVoidMethodA"); 1800 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1801 env, obj, cls, (uintptr_t) methodID); 1802 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1803 JavaValue jvalue(T_VOID); 1804 JNI_ArgumentPusherArray ap(methodID, args); 1805 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1806 JNI_END 1807 1808 1809 1810 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1811 , EntryProbe, ResultProbe) \ 1812 \ 1813 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1814 , ResultProbe); \ 1815 \ 1816 JNI_ENTRY(ResultType, \ 1817 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1818 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1819 \ 1820 EntryProbe; \ 1821 ResultType ret = 0;\ 1822 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1823 (const ResultType&)ret);\ 1824 \ 1825 va_list args; \ 1826 va_start(args, methodID); \ 1827 JavaValue jvalue(Tag); \ 1828 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1829 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1830 va_end(args); \ 1831 ret = jvalue.get_##ResultType(); \ 1832 return ret;\ 1833 JNI_END 1834 1835 // the runtime type of subword integral basic types is integer 1836 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1837 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1838 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1839 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1840 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1841 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1842 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1843 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1844 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1845 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1846 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1847 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1848 1849 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1850 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1851 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1852 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1853 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1854 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1855 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1856 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1857 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1858 // Float and double probes don't return value because dtrace doesn't currently support it 1859 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1860 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1861 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1862 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1863 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1864 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1865 1866 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1867 , EntryProbe, ResultProbe) \ 1868 \ 1869 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1870 , ResultProbe); \ 1871 \ 1872 JNI_ENTRY(ResultType, \ 1873 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1874 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1875 \ 1876 EntryProbe; \ 1877 ResultType ret = 0;\ 1878 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1879 (const ResultType&)ret);\ 1880 \ 1881 JavaValue jvalue(Tag); \ 1882 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1883 /* Make sure class is initialized before trying to invoke its method */ \ 1884 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1885 k()->initialize(CHECK_0); \ 1886 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1887 va_end(args); \ 1888 ret = jvalue.get_##ResultType(); \ 1889 return ret;\ 1890 JNI_END 1891 1892 // the runtime type of subword integral basic types is integer 1893 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1894 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1895 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1896 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1897 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1898 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1899 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1900 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1901 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1902 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1903 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1904 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1905 1906 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1907 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1908 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1909 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1910 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1911 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1912 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1913 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1914 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1915 // Float and double probes don't return value because dtrace doesn't currently support it 1916 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1917 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1918 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1919 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1920 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1921 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1922 1923 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1924 , EntryProbe, ResultProbe) \ 1925 \ 1926 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1927 , ResultProbe); \ 1928 \ 1929 JNI_ENTRY(ResultType, \ 1930 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1931 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1932 \ 1933 EntryProbe; \ 1934 ResultType ret = 0;\ 1935 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1936 (const ResultType&)ret);\ 1937 \ 1938 JavaValue jvalue(Tag); \ 1939 JNI_ArgumentPusherArray ap(methodID, args); \ 1940 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1941 ret = jvalue.get_##ResultType(); \ 1942 return ret;\ 1943 JNI_END 1944 1945 // the runtime type of subword integral basic types is integer 1946 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1947 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1948 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1949 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1950 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1951 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1952 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1953 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1954 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1955 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1956 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1957 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1958 1959 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1960 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1961 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1962 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1963 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1964 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1965 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1966 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1967 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1968 // Float and double probes don't return value because dtrace doesn't currently support it 1969 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1970 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1971 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1972 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1973 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1974 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1975 1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1980 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1981 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1982 1983 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1984 JNIWrapper("CallStaticVoidMethod"); 1985 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1986 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1987 1988 va_list args; 1989 va_start(args, methodID); 1990 JavaValue jvalue(T_VOID); 1991 JNI_ArgumentPusherVaArg ap(methodID, args); 1992 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1993 va_end(args); 1994 JNI_END 1995 1996 1997 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1998 JNIWrapper("CallStaticVoidMethodV"); 1999 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 2000 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 2001 2002 JavaValue jvalue(T_VOID); 2003 JNI_ArgumentPusherVaArg ap(methodID, args); 2004 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2005 JNI_END 2006 2007 2008 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2009 JNIWrapper("CallStaticVoidMethodA"); 2010 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2011 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2012 2013 JavaValue jvalue(T_VOID); 2014 JNI_ArgumentPusherArray ap(methodID, args); 2015 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2016 JNI_END 2017 2018 2019 // 2020 // Accessing Fields 2021 // 2022 2023 2024 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2025 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2026 2027 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2028 const char *name, const char *sig)) 2029 JNIWrapper("GetFieldID"); 2030 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2031 jfieldID ret = 0; 2032 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2033 2034 // The class should have been loaded (we have an instance of the class 2035 // passed in) so the field and signature should already be in the symbol 2036 // table. If they're not there, the field doesn't exist. 2037 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2038 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2039 if (fieldname == NULL || signame == NULL) { 2040 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2041 } 2042 KlassHandle k(THREAD, 2043 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2044 // Make sure class is initialized before handing id's out to fields 2045 k()->initialize(CHECK_NULL); 2046 2047 fieldDescriptor fd; 2048 if (!k()->is_instance_klass() || 2049 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2050 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2051 } 2052 2053 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2054 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2055 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2056 return ret; 2057 JNI_END 2058 2059 2060 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2061 JNIWrapper("GetObjectField"); 2062 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2063 oop o = JNIHandles::resolve_non_null(obj); 2064 Klass* k = o->klass(); 2065 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2066 // Keep JVMTI addition small and only check enabled flag here. 2067 // jni_GetField_probe() assumes that is okay to create handles. 2068 if (JvmtiExport::should_post_field_access()) { 2069 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2070 } 2071 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2072 #if INCLUDE_ALL_GCS 2073 // If G1 is enabled and we are accessing the value of the referent 2074 // field in a reference object then we need to register a non-null 2075 // referent with the SATB barrier. 2076 if (UseG1GC) { 2077 bool needs_barrier = false; 2078 2079 if (ret != NULL && 2080 offset == java_lang_ref_Reference::referent_offset && 2081 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2082 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2083 needs_barrier = true; 2084 } 2085 2086 if (needs_barrier) { 2087 oop referent = JNIHandles::resolve(ret); 2088 G1SATBCardTableModRefBS::enqueue(referent); 2089 } 2090 } 2091 #endif // INCLUDE_ALL_GCS 2092 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2093 return ret; 2094 JNI_END 2095 2096 2097 2098 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2099 , EntryProbe, ReturnProbe) \ 2100 \ 2101 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2102 , ReturnProbe); \ 2103 \ 2104 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2105 JNIWrapper("Get" XSTR(Result) "Field"); \ 2106 \ 2107 EntryProbe; \ 2108 Return ret = 0;\ 2109 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2110 \ 2111 oop o = JNIHandles::resolve_non_null(obj); \ 2112 Klass* k = o->klass(); \ 2113 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2114 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2115 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2116 /* and creates a ResetNoHandleMark. */ \ 2117 if (JvmtiExport::should_post_field_access()) { \ 2118 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2119 } \ 2120 ret = o->Fieldname##_field(offset); \ 2121 return ret; \ 2122 JNI_END 2123 2124 DEFINE_GETFIELD(jboolean, bool, Boolean 2125 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2126 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2127 DEFINE_GETFIELD(jbyte, byte, Byte 2128 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2129 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2130 DEFINE_GETFIELD(jchar, char, Char 2131 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2132 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2133 DEFINE_GETFIELD(jshort, short, Short 2134 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2135 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2136 DEFINE_GETFIELD(jint, int, Int 2137 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2138 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2139 DEFINE_GETFIELD(jlong, long, Long 2140 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2141 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2142 // Float and double probes don't return value because dtrace doesn't currently support it 2143 DEFINE_GETFIELD(jfloat, float, Float 2144 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2145 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2146 DEFINE_GETFIELD(jdouble, double, Double 2147 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2148 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2149 2150 address jni_GetBooleanField_addr() { 2151 return (address)jni_GetBooleanField; 2152 } 2153 address jni_GetByteField_addr() { 2154 return (address)jni_GetByteField; 2155 } 2156 address jni_GetCharField_addr() { 2157 return (address)jni_GetCharField; 2158 } 2159 address jni_GetShortField_addr() { 2160 return (address)jni_GetShortField; 2161 } 2162 address jni_GetIntField_addr() { 2163 return (address)jni_GetIntField; 2164 } 2165 address jni_GetLongField_addr() { 2166 return (address)jni_GetLongField; 2167 } 2168 address jni_GetFloatField_addr() { 2169 return (address)jni_GetFloatField; 2170 } 2171 address jni_GetDoubleField_addr() { 2172 return (address)jni_GetDoubleField; 2173 } 2174 2175 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2176 JNIWrapper("SetObjectField"); 2177 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2178 oop o = JNIHandles::resolve_non_null(obj); 2179 Klass* k = o->klass(); 2180 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2181 // Keep JVMTI addition small and only check enabled flag here. 2182 // jni_SetField_probe_nh() assumes that is not okay to create handles 2183 // and creates a ResetNoHandleMark. 2184 if (JvmtiExport::should_post_field_modification()) { 2185 jvalue field_value; 2186 field_value.l = value; 2187 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2188 } 2189 o->obj_field_put(offset, JNIHandles::resolve(value)); 2190 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2191 JNI_END 2192 2193 2194 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2195 , EntryProbe, ReturnProbe) \ 2196 \ 2197 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2198 JNIWrapper("Set" XSTR(Result) "Field"); \ 2199 \ 2200 EntryProbe; \ 2201 \ 2202 oop o = JNIHandles::resolve_non_null(obj); \ 2203 Klass* k = o->klass(); \ 2204 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2205 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2206 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2207 /* and creates a ResetNoHandleMark. */ \ 2208 if (JvmtiExport::should_post_field_modification()) { \ 2209 jvalue field_value; \ 2210 field_value.unionType = value; \ 2211 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2212 } \ 2213 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2214 o->Fieldname##_field_put(offset, value); \ 2215 ReturnProbe; \ 2216 JNI_END 2217 2218 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2219 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2220 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2221 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2222 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2223 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2224 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2225 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2226 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2227 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2228 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2229 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2230 DEFINE_SETFIELD(jint, int, Int, 'I', i 2231 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2232 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2233 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2234 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2235 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2236 // Float and double probes don't return value because dtrace doesn't currently support it 2237 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2238 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2239 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2240 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2241 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2242 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2243 2244 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2245 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2246 2247 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2248 JNIWrapper("ToReflectedField"); 2249 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2250 jobject ret = NULL; 2251 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2252 2253 fieldDescriptor fd; 2254 bool found = false; 2255 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2256 2257 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2258 2259 if (isStatic) { 2260 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2261 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2262 assert(id->is_static_field_id(), "invalid static field id"); 2263 found = id->find_local_field(&fd); 2264 } else { 2265 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2266 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2267 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2268 } 2269 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2270 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2271 ret = JNIHandles::make_local(env, reflected); 2272 return ret; 2273 JNI_END 2274 2275 2276 // 2277 // Accessing Static Fields 2278 // 2279 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2280 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2281 2282 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2283 const char *name, const char *sig)) 2284 JNIWrapper("GetStaticFieldID"); 2285 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2286 jfieldID ret = NULL; 2287 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2288 2289 // The class should have been loaded (we have an instance of the class 2290 // passed in) so the field and signature should already be in the symbol 2291 // table. If they're not there, the field doesn't exist. 2292 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2293 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2294 if (fieldname == NULL || signame == NULL) { 2295 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2296 } 2297 KlassHandle k(THREAD, 2298 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2299 // Make sure class is initialized before handing id's out to static fields 2300 k()->initialize(CHECK_NULL); 2301 2302 fieldDescriptor fd; 2303 if (!k()->is_instance_klass() || 2304 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2305 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2306 } 2307 2308 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2309 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2310 debug_only(id->set_is_static_field_id();) 2311 2312 debug_only(id->verify(fd.field_holder())); 2313 2314 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2315 return ret; 2316 JNI_END 2317 2318 2319 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2320 JNIWrapper("GetStaticObjectField"); 2321 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2322 #if INCLUDE_JNI_CHECK 2323 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2324 #endif // INCLUDE_JNI_CHECK 2325 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2326 assert(id->is_static_field_id(), "invalid static field id"); 2327 // Keep JVMTI addition small and only check enabled flag here. 2328 // jni_GetField_probe() assumes that is okay to create handles. 2329 if (JvmtiExport::should_post_field_access()) { 2330 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2331 } 2332 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2333 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2334 return ret; 2335 JNI_END 2336 2337 2338 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2339 , EntryProbe, ReturnProbe) \ 2340 \ 2341 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2342 , ReturnProbe); \ 2343 \ 2344 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2345 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2346 EntryProbe; \ 2347 Return ret = 0;\ 2348 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2349 (const Return&)ret);\ 2350 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2351 assert(id->is_static_field_id(), "invalid static field id"); \ 2352 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2353 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2354 if (JvmtiExport::should_post_field_access()) { \ 2355 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2356 } \ 2357 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2358 return ret;\ 2359 JNI_END 2360 2361 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2362 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2363 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2364 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2365 DEFINE_GETSTATICFIELD(jchar, char, Char 2366 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2367 DEFINE_GETSTATICFIELD(jshort, short, Short 2368 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2369 DEFINE_GETSTATICFIELD(jint, int, Int 2370 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2371 DEFINE_GETSTATICFIELD(jlong, long, Long 2372 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2373 // Float and double probes don't return value because dtrace doesn't currently support it 2374 DEFINE_GETSTATICFIELD(jfloat, float, Float 2375 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2376 DEFINE_GETSTATICFIELD(jdouble, double, Double 2377 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2378 2379 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2380 JNIWrapper("SetStaticObjectField"); 2381 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2382 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2383 assert(id->is_static_field_id(), "invalid static field id"); 2384 // Keep JVMTI addition small and only check enabled flag here. 2385 // jni_SetField_probe() assumes that is okay to create handles. 2386 if (JvmtiExport::should_post_field_modification()) { 2387 jvalue field_value; 2388 field_value.l = value; 2389 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2390 } 2391 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2392 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2393 JNI_END 2394 2395 2396 2397 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2398 , EntryProbe, ReturnProbe) \ 2399 \ 2400 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2401 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2402 EntryProbe; \ 2403 \ 2404 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2405 assert(id->is_static_field_id(), "invalid static field id"); \ 2406 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2407 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2408 if (JvmtiExport::should_post_field_modification()) { \ 2409 jvalue field_value; \ 2410 field_value.unionType = value; \ 2411 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2412 } \ 2413 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2414 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2415 ReturnProbe;\ 2416 JNI_END 2417 2418 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2419 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2420 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2421 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2422 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2423 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2424 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2425 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2426 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2427 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2428 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2429 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2430 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2431 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2432 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2433 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2434 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2435 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2436 // Float and double probes don't return value because dtrace doesn't currently support it 2437 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2438 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2439 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2440 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2441 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2442 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2443 2444 // 2445 // String Operations 2446 // 2447 2448 // Unicode Interface 2449 2450 DT_RETURN_MARK_DECL(NewString, jstring 2451 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2452 2453 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2454 JNIWrapper("NewString"); 2455 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2456 jstring ret = NULL; 2457 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2458 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2459 ret = (jstring) JNIHandles::make_local(env, string); 2460 return ret; 2461 JNI_END 2462 2463 2464 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2465 JNIWrapper("GetStringLength"); 2466 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2467 jsize ret = 0; 2468 oop s = JNIHandles::resolve_non_null(string); 2469 if (java_lang_String::value(s) != NULL) { 2470 ret = java_lang_String::length(s); 2471 } 2472 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2473 return ret; 2474 JNI_END 2475 2476 2477 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2478 JNIEnv *env, jstring string, jboolean *isCopy)) 2479 JNIWrapper("GetStringChars"); 2480 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2481 jchar* buf = NULL; 2482 oop s = JNIHandles::resolve_non_null(string); 2483 typeArrayOop s_value = java_lang_String::value(s); 2484 if (s_value != NULL) { 2485 int s_len = java_lang_String::length(s); 2486 bool is_latin1 = java_lang_String::is_latin1(s); 2487 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2488 /* JNI Specification states return NULL on OOM */ 2489 if (buf != NULL) { 2490 if (s_len > 0) { 2491 if (!is_latin1) { 2492 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2493 } else { 2494 for (int i = 0; i < s_len; i++) { 2495 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2496 } 2497 } 2498 } 2499 buf[s_len] = 0; 2500 //%note jni_5 2501 if (isCopy != NULL) { 2502 *isCopy = JNI_TRUE; 2503 } 2504 } 2505 } 2506 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2507 return buf; 2508 JNI_END 2509 2510 2511 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2512 JNIWrapper("ReleaseStringChars"); 2513 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2514 //%note jni_6 2515 if (chars != NULL) { 2516 // Since String objects are supposed to be immutable, don't copy any 2517 // new data back. A bad user will have to go after the char array. 2518 FreeHeap((void*) chars); 2519 } 2520 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2521 JNI_END 2522 2523 2524 // UTF Interface 2525 2526 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2527 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2528 2529 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2530 JNIWrapper("NewStringUTF"); 2531 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2532 jstring ret; 2533 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2534 2535 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2536 ret = (jstring) JNIHandles::make_local(env, result); 2537 return ret; 2538 JNI_END 2539 2540 2541 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2542 JNIWrapper("GetStringUTFLength"); 2543 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2544 jsize ret = 0; 2545 oop java_string = JNIHandles::resolve_non_null(string); 2546 if (java_lang_String::value(java_string) != NULL) { 2547 ret = java_lang_String::utf8_length(java_string); 2548 } 2549 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2550 return ret; 2551 JNI_END 2552 2553 2554 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2555 JNIWrapper("GetStringUTFChars"); 2556 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2557 char* result = NULL; 2558 oop java_string = JNIHandles::resolve_non_null(string); 2559 if (java_lang_String::value(java_string) != NULL) { 2560 size_t length = java_lang_String::utf8_length(java_string); 2561 /* JNI Specification states return NULL on OOM */ 2562 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2563 if (result != NULL) { 2564 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2565 if (isCopy != NULL) { 2566 *isCopy = JNI_TRUE; 2567 } 2568 } 2569 } 2570 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2571 return result; 2572 JNI_END 2573 2574 2575 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2576 JNIWrapper("ReleaseStringUTFChars"); 2577 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2578 if (chars != NULL) { 2579 FreeHeap((char*) chars); 2580 } 2581 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2582 JNI_END 2583 2584 2585 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2586 JNIWrapper("GetArrayLength"); 2587 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2588 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2589 assert(a->is_array(), "must be array"); 2590 jsize ret = a->length(); 2591 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2592 return ret; 2593 JNI_END 2594 2595 2596 // 2597 // Object Array Operations 2598 // 2599 2600 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2601 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2602 2603 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2604 JNIWrapper("NewObjectArray"); 2605 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2606 jobjectArray ret = NULL; 2607 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2608 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2609 Klass* ako = ek()->array_klass(CHECK_NULL); 2610 KlassHandle ak = KlassHandle(THREAD, ako); 2611 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2612 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2613 oop initial_value = JNIHandles::resolve(initialElement); 2614 if (initial_value != NULL) { // array already initialized with NULL 2615 for (int index = 0; index < length; index++) { 2616 result->obj_at_put(index, initial_value); 2617 } 2618 } 2619 ret = (jobjectArray) JNIHandles::make_local(env, result); 2620 return ret; 2621 JNI_END 2622 2623 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2624 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2625 2626 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2627 JNIWrapper("GetObjectArrayElement"); 2628 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2629 jobject ret = NULL; 2630 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2631 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2632 if (a->is_within_bounds(index)) { 2633 ret = JNIHandles::make_local(env, a->obj_at(index)); 2634 return ret; 2635 } else { 2636 char buf[jintAsStringSize]; 2637 sprintf(buf, "%d", index); 2638 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2639 } 2640 JNI_END 2641 2642 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2643 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2644 2645 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2646 JNIWrapper("SetObjectArrayElement"); 2647 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2648 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2649 2650 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2651 oop v = JNIHandles::resolve(value); 2652 if (a->is_within_bounds(index)) { 2653 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2654 a->obj_at_put(index, v); 2655 } else { 2656 THROW(vmSymbols::java_lang_ArrayStoreException()); 2657 } 2658 } else { 2659 char buf[jintAsStringSize]; 2660 sprintf(buf, "%d", index); 2661 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2662 } 2663 JNI_END 2664 2665 2666 2667 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2668 ,EntryProbe,ReturnProbe) \ 2669 \ 2670 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2671 , ReturnProbe); \ 2672 \ 2673 JNI_ENTRY(Return, \ 2674 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2675 JNIWrapper("New" XSTR(Result) "Array"); \ 2676 EntryProbe; \ 2677 Return ret = NULL;\ 2678 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2679 \ 2680 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2681 ret = (Return) JNIHandles::make_local(env, obj); \ 2682 return ret;\ 2683 JNI_END 2684 2685 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2686 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2687 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2688 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2689 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2690 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2691 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2692 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2693 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2694 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2695 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2696 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2697 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2698 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2699 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2700 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2701 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2702 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2703 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2704 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2705 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2706 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2707 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2708 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2709 2710 // Return an address which will fault if the caller writes to it. 2711 2712 static char* get_bad_address() { 2713 static char* bad_address = NULL; 2714 if (bad_address == NULL) { 2715 size_t size = os::vm_allocation_granularity(); 2716 bad_address = os::reserve_memory(size); 2717 if (bad_address != NULL) { 2718 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2719 /*is_committed*/false); 2720 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2721 } 2722 } 2723 return bad_address; 2724 } 2725 2726 2727 2728 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2729 , EntryProbe, ReturnProbe) \ 2730 \ 2731 JNI_QUICK_ENTRY(ElementType*, \ 2732 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2733 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2734 EntryProbe; \ 2735 /* allocate an chunk of memory in c land */ \ 2736 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2737 ElementType* result; \ 2738 int len = a->length(); \ 2739 if (len == 0) { \ 2740 /* Empty array: legal but useless, can't return NULL. \ 2741 * Return a pointer to something useless. \ 2742 * Avoid asserts in typeArrayOop. */ \ 2743 result = (ElementType*)get_bad_address(); \ 2744 } else { \ 2745 /* JNI Specification states return NULL on OOM */ \ 2746 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2747 if (result != NULL) { \ 2748 /* copy the array to the c chunk */ \ 2749 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2750 if (isCopy) { \ 2751 *isCopy = JNI_TRUE; \ 2752 } \ 2753 } \ 2754 } \ 2755 ReturnProbe; \ 2756 return result; \ 2757 JNI_END 2758 2759 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2760 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2761 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2762 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2763 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2764 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2765 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2766 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2767 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2768 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2769 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2770 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2771 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2772 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2773 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2774 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2775 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2776 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2777 // Float and double probes don't return value because dtrace doesn't currently support it 2778 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2779 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2780 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2781 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2782 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2783 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2784 2785 2786 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2787 , EntryProbe, ReturnProbe);\ 2788 \ 2789 JNI_QUICK_ENTRY(void, \ 2790 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2791 ElementType *buf, jint mode)) \ 2792 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2793 EntryProbe; \ 2794 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2795 int len = a->length(); \ 2796 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2797 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2798 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2799 } \ 2800 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2801 FreeHeap(buf); \ 2802 } \ 2803 } \ 2804 ReturnProbe; \ 2805 JNI_END 2806 2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2808 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2809 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2811 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2812 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2814 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2815 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2817 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2818 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2820 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2821 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2823 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2824 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2826 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2827 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2828 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2829 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2830 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2831 2832 2833 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2834 , EntryProbe, ReturnProbe); \ 2835 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2836 , ReturnProbe); \ 2837 \ 2838 JNI_ENTRY(void, \ 2839 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2840 jsize len, ElementType *buf)) \ 2841 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2842 EntryProbe; \ 2843 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2844 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2845 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2846 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2847 } else { \ 2848 if (len > 0) { \ 2849 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2850 memcpy((u_char*) buf, \ 2851 (u_char*) src->Tag##_at_addr(start), \ 2852 len << sc); \ 2853 } \ 2854 } \ 2855 JNI_END 2856 2857 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2858 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2859 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2860 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2861 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2862 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2863 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2864 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2865 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2866 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2867 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2868 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2869 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2870 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2871 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2872 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2873 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2874 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2875 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2876 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2877 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2878 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2879 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2880 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2881 2882 2883 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2884 , EntryProbe, ReturnProbe); \ 2885 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2886 ,ReturnProbe); \ 2887 \ 2888 JNI_ENTRY(void, \ 2889 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2890 jsize len, const ElementType *buf)) \ 2891 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2892 EntryProbe; \ 2893 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2894 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2895 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2896 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2897 } else { \ 2898 if (len > 0) { \ 2899 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2900 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2901 (u_char*) buf, \ 2902 len << sc); \ 2903 } \ 2904 } \ 2905 JNI_END 2906 2907 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2908 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2909 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2910 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2911 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2912 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2913 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2914 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2915 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2916 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2917 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2918 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2919 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2920 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2921 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2922 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2923 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2924 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2925 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2926 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2927 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2928 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2929 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2930 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2931 2932 2933 // 2934 // Interception of natives 2935 // 2936 2937 // The RegisterNatives call being attempted tried to register with a method that 2938 // is not native. Ask JVM TI what prefixes have been specified. Then check 2939 // to see if the native method is now wrapped with the prefixes. See the 2940 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2941 static Method* find_prefixed_native(KlassHandle k, 2942 Symbol* name, Symbol* signature, TRAPS) { 2943 #if INCLUDE_JVMTI 2944 ResourceMark rm(THREAD); 2945 Method* method; 2946 int name_len = name->utf8_length(); 2947 char* name_str = name->as_utf8(); 2948 int prefix_count; 2949 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2950 for (int i = 0; i < prefix_count; i++) { 2951 char* prefix = prefixes[i]; 2952 int prefix_len = (int)strlen(prefix); 2953 2954 // try adding this prefix to the method name and see if it matches another method name 2955 int trial_len = name_len + prefix_len; 2956 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2957 strcpy(trial_name_str, prefix); 2958 strcat(trial_name_str, name_str); 2959 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2960 if (trial_name == NULL) { 2961 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2962 } 2963 method = k()->lookup_method(trial_name, signature); 2964 if (method == NULL) { 2965 continue; // signature doesn't match, try the next prefix 2966 } 2967 if (method->is_native()) { 2968 method->set_is_prefixed_native(); 2969 return method; // wahoo, we found a prefixed version of the method, return it 2970 } 2971 // found as non-native, so prefix is good, add it, probably just need more prefixes 2972 name_len = trial_len; 2973 name_str = trial_name_str; 2974 } 2975 #endif // INCLUDE_JVMTI 2976 return NULL; // not found 2977 } 2978 2979 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2980 Method* method = k()->lookup_method(name, signature); 2981 if (method == NULL) { 2982 ResourceMark rm; 2983 stringStream st; 2984 st.print("Method %s name or signature does not match", 2985 Method::name_and_sig_as_C_string(k(), name, signature)); 2986 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2987 } 2988 if (!method->is_native()) { 2989 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2990 method = find_prefixed_native(k, name, signature, THREAD); 2991 if (method == NULL) { 2992 ResourceMark rm; 2993 stringStream st; 2994 st.print("Method %s is not declared as native", 2995 Method::name_and_sig_as_C_string(k(), name, signature)); 2996 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2997 } 2998 } 2999 3000 if (entry != NULL) { 3001 method->set_native_function(entry, 3002 Method::native_bind_event_is_interesting); 3003 } else { 3004 method->clear_native_function(); 3005 } 3006 if (PrintJNIResolving) { 3007 ResourceMark rm(THREAD); 3008 tty->print_cr("[Registering JNI native method %s.%s]", 3009 method->method_holder()->external_name(), 3010 method->name()->as_C_string()); 3011 } 3012 return true; 3013 } 3014 3015 DT_RETURN_MARK_DECL(RegisterNatives, jint 3016 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3017 3018 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3019 const JNINativeMethod *methods, 3020 jint nMethods)) 3021 JNIWrapper("RegisterNatives"); 3022 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3023 jint ret = 0; 3024 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3025 3026 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3027 3028 for (int index = 0; index < nMethods; index++) { 3029 const char* meth_name = methods[index].name; 3030 const char* meth_sig = methods[index].signature; 3031 int meth_name_len = (int)strlen(meth_name); 3032 3033 // The class should have been loaded (we have an instance of the class 3034 // passed in) so the method and signature should already be in the symbol 3035 // table. If they're not there, the method doesn't exist. 3036 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3037 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3038 3039 if (name == NULL || signature == NULL) { 3040 ResourceMark rm; 3041 stringStream st; 3042 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3043 // Must return negative value on failure 3044 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3045 } 3046 3047 bool res = register_native(h_k, name, signature, 3048 (address) methods[index].fnPtr, THREAD); 3049 if (!res) { 3050 ret = -1; 3051 break; 3052 } 3053 } 3054 return ret; 3055 JNI_END 3056 3057 3058 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3059 JNIWrapper("UnregisterNatives"); 3060 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3061 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3062 //%note jni_2 3063 if (k->is_instance_klass()) { 3064 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3065 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3066 if (m->is_native()) { 3067 m->clear_native_function(); 3068 m->set_signature_handler(NULL); 3069 } 3070 } 3071 } 3072 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3073 return 0; 3074 JNI_END 3075 3076 // 3077 // Monitor functions 3078 // 3079 3080 DT_RETURN_MARK_DECL(MonitorEnter, jint 3081 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3082 3083 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3084 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3085 jint ret = JNI_ERR; 3086 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3087 3088 // If the object is null, we can't do anything with it 3089 if (jobj == NULL) { 3090 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3091 } 3092 3093 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3094 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3095 ret = JNI_OK; 3096 return ret; 3097 JNI_END 3098 3099 DT_RETURN_MARK_DECL(MonitorExit, jint 3100 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3101 3102 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3103 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3104 jint ret = JNI_ERR; 3105 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3106 3107 // Don't do anything with a null object 3108 if (jobj == NULL) { 3109 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3110 } 3111 3112 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3113 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3114 3115 ret = JNI_OK; 3116 return ret; 3117 JNI_END 3118 3119 // 3120 // Extensions 3121 // 3122 3123 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3124 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3125 3126 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3127 JNIWrapper("GetStringRegion"); 3128 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3129 DT_VOID_RETURN_MARK(GetStringRegion); 3130 oop s = JNIHandles::resolve_non_null(string); 3131 int s_len = java_lang_String::length(s); 3132 if (start < 0 || len < 0 || start + len > s_len) { 3133 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3134 } else { 3135 if (len > 0) { 3136 typeArrayOop s_value = java_lang_String::value(s); 3137 bool is_latin1 = java_lang_String::is_latin1(s); 3138 if (!is_latin1) { 3139 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3140 } else { 3141 for (int i = 0; i < len; i++) { 3142 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3143 } 3144 } 3145 } 3146 } 3147 JNI_END 3148 3149 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3150 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3151 3152 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3153 JNIWrapper("GetStringUTFRegion"); 3154 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3155 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3156 oop s = JNIHandles::resolve_non_null(string); 3157 int s_len = java_lang_String::length(s); 3158 if (start < 0 || len < 0 || start + len > s_len) { 3159 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3160 } else { 3161 //%note jni_7 3162 if (len > 0) { 3163 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3164 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3165 // as_utf8_string null-terminates the result string 3166 } else { 3167 // JDK null-terminates the buffer even in len is zero 3168 if (buf != NULL) { 3169 buf[0] = 0; 3170 } 3171 } 3172 } 3173 JNI_END 3174 3175 3176 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3177 JNIWrapper("GetPrimitiveArrayCritical"); 3178 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3179 GCLocker::lock_critical(thread); 3180 if (isCopy != NULL) { 3181 *isCopy = JNI_FALSE; 3182 } 3183 oop a = JNIHandles::resolve_non_null(array); 3184 assert(a->is_array(), "just checking"); 3185 BasicType type; 3186 if (a->is_objArray()) { 3187 type = T_OBJECT; 3188 } else { 3189 type = TypeArrayKlass::cast(a->klass())->element_type(); 3190 } 3191 void* ret = arrayOop(a)->base(type); 3192 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3193 return ret; 3194 JNI_END 3195 3196 3197 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3198 JNIWrapper("ReleasePrimitiveArrayCritical"); 3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3200 // The array, carray and mode arguments are ignored 3201 GCLocker::unlock_critical(thread); 3202 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3203 JNI_END 3204 3205 3206 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3207 JNIWrapper("GetStringCritical"); 3208 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3209 GCLocker::lock_critical(thread); 3210 oop s = JNIHandles::resolve_non_null(string); 3211 typeArrayOop s_value = java_lang_String::value(s); 3212 bool is_latin1 = java_lang_String::is_latin1(s); 3213 if (isCopy != NULL) { 3214 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3215 } 3216 jchar* ret; 3217 if (!is_latin1) { 3218 ret = (jchar*) s_value->base(T_CHAR); 3219 } else { 3220 // Inflate latin1 encoded string to UTF16 3221 int s_len = java_lang_String::length(s); 3222 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3223 /* JNI Specification states return NULL on OOM */ 3224 if (ret != NULL) { 3225 for (int i = 0; i < s_len; i++) { 3226 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3227 } 3228 ret[s_len] = 0; 3229 } 3230 } 3231 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3232 return ret; 3233 JNI_END 3234 3235 3236 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3237 JNIWrapper("ReleaseStringCritical"); 3238 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3239 // The str and chars arguments are ignored for UTF16 strings 3240 oop s = JNIHandles::resolve_non_null(str); 3241 bool is_latin1 = java_lang_String::is_latin1(s); 3242 if (is_latin1) { 3243 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3244 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3245 FREE_C_HEAP_ARRAY(jchar, chars); 3246 } 3247 GCLocker::unlock_critical(thread); 3248 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3249 JNI_END 3250 3251 3252 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3253 JNIWrapper("jni_NewWeakGlobalRef"); 3254 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3255 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3256 jweak ret = JNIHandles::make_weak_global(ref_handle); 3257 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3258 return ret; 3259 JNI_END 3260 3261 // Must be JNI_ENTRY (with HandleMark) 3262 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3263 JNIWrapper("jni_DeleteWeakGlobalRef"); 3264 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3265 JNIHandles::destroy_weak_global(ref); 3266 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3267 JNI_END 3268 3269 3270 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3271 JNIWrapper("jni_ExceptionCheck"); 3272 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3273 jni_check_async_exceptions(thread); 3274 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3275 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3276 return ret; 3277 JNI_END 3278 3279 3280 // Initialization state for three routines below relating to 3281 // java.nio.DirectBuffers 3282 static jint directBufferSupportInitializeStarted = 0; 3283 static volatile jint directBufferSupportInitializeEnded = 0; 3284 static volatile jint directBufferSupportInitializeFailed = 0; 3285 static jclass bufferClass = NULL; 3286 static jclass directBufferClass = NULL; 3287 static jclass directByteBufferClass = NULL; 3288 static jmethodID directByteBufferConstructor = NULL; 3289 static jfieldID directBufferAddressField = NULL; 3290 static jfieldID bufferCapacityField = NULL; 3291 3292 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3293 Handle loader; // null (bootstrap) loader 3294 Handle protection_domain; // null protection domain 3295 3296 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3297 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3298 3299 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3300 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3301 } 3302 return result; 3303 } 3304 3305 // These lookups are done with the NULL (bootstrap) ClassLoader to 3306 // circumvent any security checks that would be done by jni_FindClass. 3307 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3308 { 3309 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3310 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3311 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3312 return true; 3313 } 3314 JNI_END 3315 3316 3317 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3318 if (directBufferSupportInitializeFailed) { 3319 return false; 3320 } 3321 3322 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3323 if (!lookupDirectBufferClasses(env)) { 3324 directBufferSupportInitializeFailed = 1; 3325 return false; 3326 } 3327 3328 // Make global references for these 3329 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3330 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3331 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3332 3333 // Get needed field and method IDs 3334 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3335 if (env->ExceptionCheck()) { 3336 env->ExceptionClear(); 3337 directBufferSupportInitializeFailed = 1; 3338 return false; 3339 } 3340 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3341 if (env->ExceptionCheck()) { 3342 env->ExceptionClear(); 3343 directBufferSupportInitializeFailed = 1; 3344 return false; 3345 } 3346 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3347 if (env->ExceptionCheck()) { 3348 env->ExceptionClear(); 3349 directBufferSupportInitializeFailed = 1; 3350 return false; 3351 } 3352 3353 if ((directByteBufferConstructor == NULL) || 3354 (directBufferAddressField == NULL) || 3355 (bufferCapacityField == NULL)) { 3356 directBufferSupportInitializeFailed = 1; 3357 return false; 3358 } 3359 3360 directBufferSupportInitializeEnded = 1; 3361 } else { 3362 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3363 os::naked_yield(); 3364 } 3365 } 3366 3367 return !directBufferSupportInitializeFailed; 3368 } 3369 3370 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3371 { 3372 // thread_from_jni_environment() will block if VM is gone. 3373 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3374 3375 JNIWrapper("jni_NewDirectByteBuffer"); 3376 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3377 3378 if (!directBufferSupportInitializeEnded) { 3379 if (!initializeDirectBufferSupport(env, thread)) { 3380 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3381 return NULL; 3382 } 3383 } 3384 3385 // Being paranoid about accidental sign extension on address 3386 jlong addr = (jlong) ((uintptr_t) address); 3387 // NOTE that package-private DirectByteBuffer constructor currently 3388 // takes int capacity 3389 jint cap = (jint) capacity; 3390 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3391 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3392 return ret; 3393 } 3394 3395 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3396 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3397 3398 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3399 { 3400 // thread_from_jni_environment() will block if VM is gone. 3401 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3402 3403 JNIWrapper("jni_GetDirectBufferAddress"); 3404 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3405 void* ret = NULL; 3406 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3407 3408 if (!directBufferSupportInitializeEnded) { 3409 if (!initializeDirectBufferSupport(env, thread)) { 3410 return 0; 3411 } 3412 } 3413 3414 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3415 return 0; 3416 } 3417 3418 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3419 return ret; 3420 } 3421 3422 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3423 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3424 3425 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3426 { 3427 // thread_from_jni_environment() will block if VM is gone. 3428 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3429 3430 JNIWrapper("jni_GetDirectBufferCapacity"); 3431 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3432 jlong ret = -1; 3433 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3434 3435 if (!directBufferSupportInitializeEnded) { 3436 if (!initializeDirectBufferSupport(env, thread)) { 3437 ret = 0; 3438 return ret; 3439 } 3440 } 3441 3442 if (buf == NULL) { 3443 return -1; 3444 } 3445 3446 if (!env->IsInstanceOf(buf, directBufferClass)) { 3447 return -1; 3448 } 3449 3450 // NOTE that capacity is currently an int in the implementation 3451 ret = env->GetIntField(buf, bufferCapacityField); 3452 return ret; 3453 } 3454 3455 3456 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3457 JNIWrapper("GetVersion"); 3458 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3459 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3460 return CurrentVersion; 3461 JNI_END 3462 3463 extern struct JavaVM_ main_vm; 3464 3465 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3466 JNIWrapper("jni_GetJavaVM"); 3467 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3468 *vm = (JavaVM *)(&main_vm); 3469 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3470 return JNI_OK; 3471 JNI_END 3472 3473 3474 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3475 JNIWrapper("GetModule"); 3476 return Modules::get_module(clazz, THREAD); 3477 JNI_END 3478 3479 3480 JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2)) 3481 JNIWrapper("AddModuleReads"); 3482 if (m1 == NULL || m2 == NULL) { 3483 THROW(vmSymbols::java_lang_NullPointerException()); 3484 } 3485 JavaValue result(T_VOID); 3486 Handle m1_h(THREAD, JNIHandles::resolve(m1)); 3487 if (!java_lang_reflect_Module::is_instance(m1_h())) { 3488 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object"); 3489 } 3490 Handle m2_h(THREAD, JNIHandles::resolve(m2)); 3491 if (!java_lang_reflect_Module::is_instance(m2_h())) { 3492 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object"); 3493 } 3494 JavaCalls::call_static(&result, 3495 KlassHandle(THREAD, SystemDictionary::module_Modules_klass()), 3496 vmSymbols::addReads_name(), 3497 vmSymbols::addReads_signature(), 3498 m1_h, 3499 m2_h, 3500 THREAD); 3501 JNI_END 3502 3503 3504 JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2)) 3505 JNIWrapper("CanReadModule"); 3506 if (m1 == NULL || m2 == NULL) { 3507 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3508 } 3509 jboolean res = Modules::can_read_module(m1, m2, CHECK_false); 3510 return res; 3511 JNI_END 3512 3513 3514 // Structure containing all jni functions 3515 struct JNINativeInterface_ jni_NativeInterface = { 3516 NULL, 3517 NULL, 3518 NULL, 3519 3520 NULL, 3521 3522 jni_GetVersion, 3523 3524 jni_DefineClass, 3525 jni_FindClass, 3526 3527 jni_FromReflectedMethod, 3528 jni_FromReflectedField, 3529 3530 jni_ToReflectedMethod, 3531 3532 jni_GetSuperclass, 3533 jni_IsAssignableFrom, 3534 3535 jni_ToReflectedField, 3536 3537 jni_Throw, 3538 jni_ThrowNew, 3539 jni_ExceptionOccurred, 3540 jni_ExceptionDescribe, 3541 jni_ExceptionClear, 3542 jni_FatalError, 3543 3544 jni_PushLocalFrame, 3545 jni_PopLocalFrame, 3546 3547 jni_NewGlobalRef, 3548 jni_DeleteGlobalRef, 3549 jni_DeleteLocalRef, 3550 jni_IsSameObject, 3551 3552 jni_NewLocalRef, 3553 jni_EnsureLocalCapacity, 3554 3555 jni_AllocObject, 3556 jni_NewObject, 3557 jni_NewObjectV, 3558 jni_NewObjectA, 3559 3560 jni_GetObjectClass, 3561 jni_IsInstanceOf, 3562 3563 jni_GetMethodID, 3564 3565 jni_CallObjectMethod, 3566 jni_CallObjectMethodV, 3567 jni_CallObjectMethodA, 3568 jni_CallBooleanMethod, 3569 jni_CallBooleanMethodV, 3570 jni_CallBooleanMethodA, 3571 jni_CallByteMethod, 3572 jni_CallByteMethodV, 3573 jni_CallByteMethodA, 3574 jni_CallCharMethod, 3575 jni_CallCharMethodV, 3576 jni_CallCharMethodA, 3577 jni_CallShortMethod, 3578 jni_CallShortMethodV, 3579 jni_CallShortMethodA, 3580 jni_CallIntMethod, 3581 jni_CallIntMethodV, 3582 jni_CallIntMethodA, 3583 jni_CallLongMethod, 3584 jni_CallLongMethodV, 3585 jni_CallLongMethodA, 3586 jni_CallFloatMethod, 3587 jni_CallFloatMethodV, 3588 jni_CallFloatMethodA, 3589 jni_CallDoubleMethod, 3590 jni_CallDoubleMethodV, 3591 jni_CallDoubleMethodA, 3592 jni_CallVoidMethod, 3593 jni_CallVoidMethodV, 3594 jni_CallVoidMethodA, 3595 3596 jni_CallNonvirtualObjectMethod, 3597 jni_CallNonvirtualObjectMethodV, 3598 jni_CallNonvirtualObjectMethodA, 3599 jni_CallNonvirtualBooleanMethod, 3600 jni_CallNonvirtualBooleanMethodV, 3601 jni_CallNonvirtualBooleanMethodA, 3602 jni_CallNonvirtualByteMethod, 3603 jni_CallNonvirtualByteMethodV, 3604 jni_CallNonvirtualByteMethodA, 3605 jni_CallNonvirtualCharMethod, 3606 jni_CallNonvirtualCharMethodV, 3607 jni_CallNonvirtualCharMethodA, 3608 jni_CallNonvirtualShortMethod, 3609 jni_CallNonvirtualShortMethodV, 3610 jni_CallNonvirtualShortMethodA, 3611 jni_CallNonvirtualIntMethod, 3612 jni_CallNonvirtualIntMethodV, 3613 jni_CallNonvirtualIntMethodA, 3614 jni_CallNonvirtualLongMethod, 3615 jni_CallNonvirtualLongMethodV, 3616 jni_CallNonvirtualLongMethodA, 3617 jni_CallNonvirtualFloatMethod, 3618 jni_CallNonvirtualFloatMethodV, 3619 jni_CallNonvirtualFloatMethodA, 3620 jni_CallNonvirtualDoubleMethod, 3621 jni_CallNonvirtualDoubleMethodV, 3622 jni_CallNonvirtualDoubleMethodA, 3623 jni_CallNonvirtualVoidMethod, 3624 jni_CallNonvirtualVoidMethodV, 3625 jni_CallNonvirtualVoidMethodA, 3626 3627 jni_GetFieldID, 3628 3629 jni_GetObjectField, 3630 jni_GetBooleanField, 3631 jni_GetByteField, 3632 jni_GetCharField, 3633 jni_GetShortField, 3634 jni_GetIntField, 3635 jni_GetLongField, 3636 jni_GetFloatField, 3637 jni_GetDoubleField, 3638 3639 jni_SetObjectField, 3640 jni_SetBooleanField, 3641 jni_SetByteField, 3642 jni_SetCharField, 3643 jni_SetShortField, 3644 jni_SetIntField, 3645 jni_SetLongField, 3646 jni_SetFloatField, 3647 jni_SetDoubleField, 3648 3649 jni_GetStaticMethodID, 3650 3651 jni_CallStaticObjectMethod, 3652 jni_CallStaticObjectMethodV, 3653 jni_CallStaticObjectMethodA, 3654 jni_CallStaticBooleanMethod, 3655 jni_CallStaticBooleanMethodV, 3656 jni_CallStaticBooleanMethodA, 3657 jni_CallStaticByteMethod, 3658 jni_CallStaticByteMethodV, 3659 jni_CallStaticByteMethodA, 3660 jni_CallStaticCharMethod, 3661 jni_CallStaticCharMethodV, 3662 jni_CallStaticCharMethodA, 3663 jni_CallStaticShortMethod, 3664 jni_CallStaticShortMethodV, 3665 jni_CallStaticShortMethodA, 3666 jni_CallStaticIntMethod, 3667 jni_CallStaticIntMethodV, 3668 jni_CallStaticIntMethodA, 3669 jni_CallStaticLongMethod, 3670 jni_CallStaticLongMethodV, 3671 jni_CallStaticLongMethodA, 3672 jni_CallStaticFloatMethod, 3673 jni_CallStaticFloatMethodV, 3674 jni_CallStaticFloatMethodA, 3675 jni_CallStaticDoubleMethod, 3676 jni_CallStaticDoubleMethodV, 3677 jni_CallStaticDoubleMethodA, 3678 jni_CallStaticVoidMethod, 3679 jni_CallStaticVoidMethodV, 3680 jni_CallStaticVoidMethodA, 3681 3682 jni_GetStaticFieldID, 3683 3684 jni_GetStaticObjectField, 3685 jni_GetStaticBooleanField, 3686 jni_GetStaticByteField, 3687 jni_GetStaticCharField, 3688 jni_GetStaticShortField, 3689 jni_GetStaticIntField, 3690 jni_GetStaticLongField, 3691 jni_GetStaticFloatField, 3692 jni_GetStaticDoubleField, 3693 3694 jni_SetStaticObjectField, 3695 jni_SetStaticBooleanField, 3696 jni_SetStaticByteField, 3697 jni_SetStaticCharField, 3698 jni_SetStaticShortField, 3699 jni_SetStaticIntField, 3700 jni_SetStaticLongField, 3701 jni_SetStaticFloatField, 3702 jni_SetStaticDoubleField, 3703 3704 jni_NewString, 3705 jni_GetStringLength, 3706 jni_GetStringChars, 3707 jni_ReleaseStringChars, 3708 3709 jni_NewStringUTF, 3710 jni_GetStringUTFLength, 3711 jni_GetStringUTFChars, 3712 jni_ReleaseStringUTFChars, 3713 3714 jni_GetArrayLength, 3715 3716 jni_NewObjectArray, 3717 jni_GetObjectArrayElement, 3718 jni_SetObjectArrayElement, 3719 3720 jni_NewBooleanArray, 3721 jni_NewByteArray, 3722 jni_NewCharArray, 3723 jni_NewShortArray, 3724 jni_NewIntArray, 3725 jni_NewLongArray, 3726 jni_NewFloatArray, 3727 jni_NewDoubleArray, 3728 3729 jni_GetBooleanArrayElements, 3730 jni_GetByteArrayElements, 3731 jni_GetCharArrayElements, 3732 jni_GetShortArrayElements, 3733 jni_GetIntArrayElements, 3734 jni_GetLongArrayElements, 3735 jni_GetFloatArrayElements, 3736 jni_GetDoubleArrayElements, 3737 3738 jni_ReleaseBooleanArrayElements, 3739 jni_ReleaseByteArrayElements, 3740 jni_ReleaseCharArrayElements, 3741 jni_ReleaseShortArrayElements, 3742 jni_ReleaseIntArrayElements, 3743 jni_ReleaseLongArrayElements, 3744 jni_ReleaseFloatArrayElements, 3745 jni_ReleaseDoubleArrayElements, 3746 3747 jni_GetBooleanArrayRegion, 3748 jni_GetByteArrayRegion, 3749 jni_GetCharArrayRegion, 3750 jni_GetShortArrayRegion, 3751 jni_GetIntArrayRegion, 3752 jni_GetLongArrayRegion, 3753 jni_GetFloatArrayRegion, 3754 jni_GetDoubleArrayRegion, 3755 3756 jni_SetBooleanArrayRegion, 3757 jni_SetByteArrayRegion, 3758 jni_SetCharArrayRegion, 3759 jni_SetShortArrayRegion, 3760 jni_SetIntArrayRegion, 3761 jni_SetLongArrayRegion, 3762 jni_SetFloatArrayRegion, 3763 jni_SetDoubleArrayRegion, 3764 3765 jni_RegisterNatives, 3766 jni_UnregisterNatives, 3767 3768 jni_MonitorEnter, 3769 jni_MonitorExit, 3770 3771 jni_GetJavaVM, 3772 3773 jni_GetStringRegion, 3774 jni_GetStringUTFRegion, 3775 3776 jni_GetPrimitiveArrayCritical, 3777 jni_ReleasePrimitiveArrayCritical, 3778 3779 jni_GetStringCritical, 3780 jni_ReleaseStringCritical, 3781 3782 jni_NewWeakGlobalRef, 3783 jni_DeleteWeakGlobalRef, 3784 3785 jni_ExceptionCheck, 3786 3787 jni_NewDirectByteBuffer, 3788 jni_GetDirectBufferAddress, 3789 jni_GetDirectBufferCapacity, 3790 3791 // New 1_6 features 3792 3793 jni_GetObjectRefType, 3794 3795 // Module features 3796 3797 jni_GetModule, 3798 jni_AddModuleReads, 3799 jni_CanReadModule 3800 }; 3801 3802 3803 // For jvmti use to modify jni function table. 3804 // Java threads in native contiues to run until it is transitioned 3805 // to VM at safepoint. Before the transition or before it is blocked 3806 // for safepoint it may access jni function table. VM could crash if 3807 // any java thread access the jni function table in the middle of memcpy. 3808 // To avoid this each function pointers are copied automically. 3809 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3810 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3811 intptr_t *a = (intptr_t *) jni_functions(); 3812 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3813 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3814 Atomic::store_ptr(*b++, a++); 3815 } 3816 } 3817 3818 void quicken_jni_functions() { 3819 // Replace Get<Primitive>Field with fast versions 3820 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3821 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3822 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3823 // windows x86 currently needs SEH wrapper and the gain of the fast 3824 // versions currently isn't certain for server vm on uniprocessor. 3825 && os::is_MP() 3826 #endif 3827 ) { 3828 address func; 3829 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3830 if (func != (address)-1) { 3831 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3832 } 3833 func = JNI_FastGetField::generate_fast_get_byte_field(); 3834 if (func != (address)-1) { 3835 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3836 } 3837 func = JNI_FastGetField::generate_fast_get_char_field(); 3838 if (func != (address)-1) { 3839 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3840 } 3841 func = JNI_FastGetField::generate_fast_get_short_field(); 3842 if (func != (address)-1) { 3843 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3844 } 3845 func = JNI_FastGetField::generate_fast_get_int_field(); 3846 if (func != (address)-1) { 3847 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3848 } 3849 func = JNI_FastGetField::generate_fast_get_long_field(); 3850 if (func != (address)-1) { 3851 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3852 } 3853 func = JNI_FastGetField::generate_fast_get_float_field(); 3854 if (func != (address)-1) { 3855 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3856 } 3857 func = JNI_FastGetField::generate_fast_get_double_field(); 3858 if (func != (address)-1) { 3859 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3860 } 3861 } 3862 } 3863 3864 // Returns the function structure 3865 struct JNINativeInterface_* jni_functions() { 3866 #if INCLUDE_JNI_CHECK 3867 if (CheckJNICalls) return jni_functions_check(); 3868 #endif // INCLUDE_JNI_CHECK 3869 return &jni_NativeInterface; 3870 } 3871 3872 // Returns the function structure 3873 struct JNINativeInterface_* jni_functions_nocheck() { 3874 return &jni_NativeInterface; 3875 } 3876 3877 3878 // Invocation API 3879 3880 3881 // Forward declaration 3882 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3883 3884 // Global invocation API vars 3885 volatile jint vm_created = 0; 3886 // Indicate whether it is safe to recreate VM 3887 volatile jint safe_to_recreate_vm = 1; 3888 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3889 3890 3891 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3892 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3893 3894 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3895 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3896 3897 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3898 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3899 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3900 jint ret = JNI_ERR; 3901 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3902 3903 if (Threads::is_supported_jni_version(args->version)) { 3904 ret = JNI_OK; 3905 } 3906 // 1.1 style no longer supported in hotspot. 3907 // According the JNI spec, we should update args->version on return. 3908 // We also use the structure to communicate with launcher about default 3909 // stack size. 3910 if (args->version == JNI_VERSION_1_1) { 3911 args->version = JNI_VERSION_1_2; 3912 // javaStackSize is int in arguments structure 3913 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3914 args->javaStackSize = (jint)(ThreadStackSize * K); 3915 } 3916 return ret; 3917 } 3918 3919 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3920 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3921 3922 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3923 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3924 3925 jint result = JNI_ERR; 3926 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3927 3928 // We're about to use Atomic::xchg for synchronization. Some Zero 3929 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3930 // but __sync_lock_test_and_set is not guaranteed to do what we want 3931 // on all architectures. So we check it works before relying on it. 3932 #if defined(ZERO) && defined(ASSERT) 3933 { 3934 jint a = 0xcafebabe; 3935 jint b = Atomic::xchg(0xdeadbeef, &a); 3936 void *c = &a; 3937 void *d = Atomic::xchg_ptr(&b, &c); 3938 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3939 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3940 } 3941 #endif // ZERO && ASSERT 3942 3943 // At the moment it's only possible to have one Java VM, 3944 // since some of the runtime state is in global variables. 3945 3946 // We cannot use our mutex locks here, since they only work on 3947 // Threads. We do an atomic compare and exchange to ensure only 3948 // one thread can call this method at a time 3949 3950 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3951 // the add/dec implementations are dependent on whether we are running 3952 // on a multiprocessor, and at this stage of initialization the os::is_MP 3953 // function used to determine this will always return false. Atomic::xchg 3954 // does not have this problem. 3955 if (Atomic::xchg(1, &vm_created) == 1) { 3956 return JNI_EEXIST; // already created, or create attempt in progress 3957 } 3958 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3959 return JNI_ERR; // someone tried and failed and retry not allowed. 3960 } 3961 3962 assert(vm_created == 1, "vm_created is true during the creation"); 3963 3964 /** 3965 * Certain errors during initialization are recoverable and do not 3966 * prevent this method from being called again at a later time 3967 * (perhaps with different arguments). However, at a certain 3968 * point during initialization if an error occurs we cannot allow 3969 * this function to be called again (or it will crash). In those 3970 * situations, the 'canTryAgain' flag is set to false, which atomically 3971 * sets safe_to_recreate_vm to 1, such that any new call to 3972 * JNI_CreateJavaVM will immediately fail using the above logic. 3973 */ 3974 bool can_try_again = true; 3975 3976 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3977 if (result == JNI_OK) { 3978 JavaThread *thread = JavaThread::current(); 3979 assert(!thread->has_pending_exception(), "should have returned not OK"); 3980 /* thread is thread_in_vm here */ 3981 *vm = (JavaVM *)(&main_vm); 3982 *(JNIEnv**)penv = thread->jni_environment(); 3983 3984 #if INCLUDE_JVMCI 3985 if (EnableJVMCI) { 3986 if (UseJVMCICompiler) { 3987 // JVMCI is initialized on a CompilerThread 3988 if (BootstrapJVMCI) { 3989 JavaThread* THREAD = thread; 3990 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3991 compiler->bootstrap(); 3992 if (HAS_PENDING_EXCEPTION) { 3993 HandleMark hm; 3994 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3995 } 3996 } 3997 } 3998 } 3999 #endif 4000 4001 // Tracks the time application was running before GC 4002 RuntimeService::record_application_start(); 4003 4004 // Notify JVMTI 4005 if (JvmtiExport::should_post_thread_life()) { 4006 JvmtiExport::post_thread_start(thread); 4007 } 4008 4009 EventThreadStart event; 4010 if (event.should_commit()) { 4011 event.set_thread(THREAD_TRACE_ID(thread)); 4012 event.commit(); 4013 } 4014 4015 #ifndef PRODUCT 4016 // Check if we should compile all classes on bootclasspath 4017 if (CompileTheWorld) ClassLoader::compile_the_world(); 4018 if (ReplayCompiles) ciReplay::replay(thread); 4019 4020 // Some platforms (like Win*) need a wrapper around these test 4021 // functions in order to properly handle error conditions. 4022 test_error_handler(); 4023 if (ExecuteInternalVMTests) { 4024 InternalVMTests::run(); 4025 } 4026 #endif 4027 4028 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4029 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4030 } else { 4031 // If create_vm exits because of a pending exception, exit with that 4032 // exception. In the future when we figure out how to reclaim memory, 4033 // we may be able to exit with JNI_ERR and allow the calling application 4034 // to continue. 4035 if (Universe::is_fully_initialized()) { 4036 // otherwise no pending exception possible - VM will already have aborted 4037 JavaThread* THREAD = JavaThread::current(); 4038 if (HAS_PENDING_EXCEPTION) { 4039 HandleMark hm; 4040 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4041 } 4042 } 4043 4044 if (can_try_again) { 4045 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4046 safe_to_recreate_vm = 1; 4047 } 4048 4049 // Creation failed. We must reset vm_created 4050 *vm = 0; 4051 *(JNIEnv**)penv = 0; 4052 // reset vm_created last to avoid race condition. Use OrderAccess to 4053 // control both compiler and architectural-based reordering. 4054 OrderAccess::release_store(&vm_created, 0); 4055 } 4056 4057 // Flush stdout and stderr before exit. 4058 fflush(stdout); 4059 fflush(stderr); 4060 4061 return result; 4062 4063 } 4064 4065 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4066 jint result = 0; 4067 // On Windows, let CreateJavaVM run with SEH protection 4068 #ifdef _WIN32 4069 __try { 4070 #endif 4071 result = JNI_CreateJavaVM_inner(vm, penv, args); 4072 #ifdef _WIN32 4073 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4074 // Nothing to do. 4075 } 4076 #endif 4077 return result; 4078 } 4079 4080 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4081 // See bug 4367188, the wrapper can sometimes cause VM crashes 4082 // JNIWrapper("GetCreatedJavaVMs"); 4083 4084 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4085 4086 if (vm_created) { 4087 if (numVMs != NULL) *numVMs = 1; 4088 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4089 } else { 4090 if (numVMs != NULL) *numVMs = 0; 4091 } 4092 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4093 return JNI_OK; 4094 } 4095 4096 extern "C" { 4097 4098 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4099 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4100 4101 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4102 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4103 jint res = JNI_ERR; 4104 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4105 4106 if (!vm_created) { 4107 res = JNI_ERR; 4108 return res; 4109 } 4110 4111 JNIWrapper("DestroyJavaVM"); 4112 JNIEnv *env; 4113 JavaVMAttachArgs destroyargs; 4114 destroyargs.version = CurrentVersion; 4115 destroyargs.name = (char *)"DestroyJavaVM"; 4116 destroyargs.group = NULL; 4117 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4118 if (res != JNI_OK) { 4119 return res; 4120 } 4121 4122 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4123 JavaThread* thread = JavaThread::current(); 4124 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4125 if (Threads::destroy_vm()) { 4126 // Should not change thread state, VM is gone 4127 vm_created = false; 4128 res = JNI_OK; 4129 return res; 4130 } else { 4131 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4132 res = JNI_ERR; 4133 return res; 4134 } 4135 } 4136 4137 4138 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4139 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4140 4141 // Check below commented out from JDK1.2fcs as well 4142 /* 4143 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4144 return JNI_EVERSION; 4145 } 4146 */ 4147 4148 Thread* t = Thread::current_or_null(); 4149 if (t != NULL) { 4150 // If the thread has been attached this operation is a no-op 4151 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4152 return JNI_OK; 4153 } 4154 4155 // Create a thread and mark it as attaching so it will be skipped by the 4156 // ThreadsListEnumerator - see CR 6404306 4157 JavaThread* thread = new JavaThread(true); 4158 4159 // Set correct safepoint info. The thread is going to call into Java when 4160 // initializing the Java level thread object. Hence, the correct state must 4161 // be set in order for the Safepoint code to deal with it correctly. 4162 thread->set_thread_state(_thread_in_vm); 4163 thread->record_stack_base_and_size(); 4164 thread->initialize_thread_current(); 4165 4166 if (!os::create_attached_thread(thread)) { 4167 delete thread; 4168 return JNI_ERR; 4169 } 4170 // Enable stack overflow checks 4171 thread->create_stack_guard_pages(); 4172 4173 thread->initialize_tlab(); 4174 4175 thread->cache_global_variables(); 4176 4177 // Crucial that we do not have a safepoint check for this thread, since it has 4178 // not been added to the Thread list yet. 4179 { Threads_lock->lock_without_safepoint_check(); 4180 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4181 // avoid this thread trying to do a GC before it is added to the thread-list 4182 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4183 Threads::add(thread, daemon); 4184 Threads_lock->unlock(); 4185 } 4186 // Create thread group and name info from attach arguments 4187 oop group = NULL; 4188 char* thread_name = NULL; 4189 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4190 group = JNIHandles::resolve(args->group); 4191 thread_name = args->name; // may be NULL 4192 } 4193 if (group == NULL) group = Universe::main_thread_group(); 4194 4195 // Create Java level thread object and attach it to this thread 4196 bool attach_failed = false; 4197 { 4198 EXCEPTION_MARK; 4199 HandleMark hm(THREAD); 4200 Handle thread_group(THREAD, group); 4201 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4202 if (HAS_PENDING_EXCEPTION) { 4203 CLEAR_PENDING_EXCEPTION; 4204 // cleanup outside the handle mark. 4205 attach_failed = true; 4206 } 4207 } 4208 4209 if (attach_failed) { 4210 // Added missing cleanup 4211 thread->cleanup_failed_attach_current_thread(); 4212 return JNI_ERR; 4213 } 4214 4215 // mark the thread as no longer attaching 4216 // this uses a fence to push the change through so we don't have 4217 // to regrab the threads_lock 4218 thread->set_done_attaching_via_jni(); 4219 4220 // Set java thread status. 4221 java_lang_Thread::set_thread_status(thread->threadObj(), 4222 java_lang_Thread::RUNNABLE); 4223 4224 // Notify the debugger 4225 if (JvmtiExport::should_post_thread_life()) { 4226 JvmtiExport::post_thread_start(thread); 4227 } 4228 4229 EventThreadStart event; 4230 if (event.should_commit()) { 4231 event.set_thread(THREAD_TRACE_ID(thread)); 4232 event.commit(); 4233 } 4234 4235 *(JNIEnv**)penv = thread->jni_environment(); 4236 4237 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4238 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4239 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4240 // needed. 4241 4242 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4243 4244 // Perform any platform dependent FPU setup 4245 os::setup_fpu(); 4246 4247 return JNI_OK; 4248 } 4249 4250 4251 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4252 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4253 if (!vm_created) { 4254 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4255 return JNI_ERR; 4256 } 4257 4258 JNIWrapper("AttachCurrentThread"); 4259 jint ret = attach_current_thread(vm, penv, _args, false); 4260 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4261 return ret; 4262 } 4263 4264 4265 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4266 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4267 VM_Exit::block_if_vm_exited(); 4268 4269 JNIWrapper("DetachCurrentThread"); 4270 4271 // If the thread has already been detached the operation is a no-op 4272 if (Thread::current_or_null() == NULL) { 4273 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4274 return JNI_OK; 4275 } 4276 4277 JavaThread* thread = JavaThread::current(); 4278 if (thread->has_last_Java_frame()) { 4279 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4280 // Can't detach a thread that's running java, that can't work. 4281 return JNI_ERR; 4282 } 4283 4284 // Safepoint support. Have to do call-back to safepoint code, if in the 4285 // middel of a safepoint operation 4286 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4287 4288 // XXX: Note that JavaThread::exit() call below removes the guards on the 4289 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4290 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4291 // of the guards is visible in jni_AttachCurrentThread above, 4292 // the removal of the guards is buried below in JavaThread::exit() 4293 // here. The abstraction should be more symmetrically either exposed 4294 // or hidden (e.g. it could probably be hidden in the same 4295 // (platform-dependent) methods where we do alternate stack 4296 // maintenance work?) 4297 thread->exit(false, JavaThread::jni_detach); 4298 delete thread; 4299 4300 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4301 return JNI_OK; 4302 } 4303 4304 DT_RETURN_MARK_DECL(GetEnv, jint 4305 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4306 4307 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4308 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4309 jint ret = JNI_ERR; 4310 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4311 4312 if (!vm_created) { 4313 *penv = NULL; 4314 ret = JNI_EDETACHED; 4315 return ret; 4316 } 4317 4318 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4319 return ret; 4320 } 4321 4322 #ifndef JVMPI_VERSION_1 4323 // need these in order to be polite about older agents 4324 #define JVMPI_VERSION_1 ((jint)0x10000001) 4325 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4326 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4327 #endif // !JVMPI_VERSION_1 4328 4329 Thread* thread = Thread::current_or_null(); 4330 if (thread != NULL && thread->is_Java_thread()) { 4331 if (Threads::is_supported_jni_version_including_1_1(version)) { 4332 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4333 ret = JNI_OK; 4334 return ret; 4335 4336 } else if (version == JVMPI_VERSION_1 || 4337 version == JVMPI_VERSION_1_1 || 4338 version == JVMPI_VERSION_1_2) { 4339 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4340 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4341 ret = JNI_EVERSION; 4342 return ret; 4343 } else if (JvmtiExport::is_jvmdi_version(version)) { 4344 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4345 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4346 ret = JNI_EVERSION; 4347 return ret; 4348 } else { 4349 *penv = NULL; 4350 ret = JNI_EVERSION; 4351 return ret; 4352 } 4353 } else { 4354 *penv = NULL; 4355 ret = JNI_EDETACHED; 4356 return ret; 4357 } 4358 } 4359 4360 4361 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4362 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4363 if (!vm_created) { 4364 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4365 return JNI_ERR; 4366 } 4367 4368 JNIWrapper("AttachCurrentThreadAsDaemon"); 4369 jint ret = attach_current_thread(vm, penv, _args, true); 4370 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4371 return ret; 4372 } 4373 4374 4375 } // End extern "C" 4376 4377 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4378 NULL, 4379 NULL, 4380 NULL, 4381 4382 jni_DestroyJavaVM, 4383 jni_AttachCurrentThread, 4384 jni_DetachCurrentThread, 4385 jni_GetEnv, 4386 jni_AttachCurrentThreadAsDaemon 4387 };