1 /* 2 * Copyright (c) 1997, 2015, 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/symbolTable.hpp" 33 #include "classfile/systemDictionary.hpp" 34 #include "classfile/vmSymbols.hpp" 35 #include "gc/shared/gcLocker.inline.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "memory/allocation.hpp" 38 #include "memory/allocation.inline.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/universe.inline.hpp" 41 #include "oops/instanceKlass.hpp" 42 #include "oops/instanceOop.hpp" 43 #include "oops/markOop.hpp" 44 #include "oops/method.hpp" 45 #include "oops/objArrayKlass.hpp" 46 #include "oops/objArrayOop.inline.hpp" 47 #include "oops/oop.inline.hpp" 48 #include "oops/symbol.hpp" 49 #include "oops/typeArrayKlass.hpp" 50 #include "oops/typeArrayOop.hpp" 51 #include "prims/jni.h" 52 #include "prims/jniCheck.hpp" 53 #include "prims/jniExport.hpp" 54 #include "prims/jniFastGetField.hpp" 55 #include "prims/jvm.h" 56 #include "prims/jvm_misc.hpp" 57 #include "prims/jvmtiExport.hpp" 58 #include "prims/jvmtiThreadState.hpp" 59 #include "runtime/atomic.inline.hpp" 60 #include "runtime/compilationPolicy.hpp" 61 #include "runtime/fieldDescriptor.hpp" 62 #include "runtime/fprofiler.hpp" 63 #include "runtime/handles.inline.hpp" 64 #include "runtime/interfaceSupport.hpp" 65 #include "runtime/java.hpp" 66 #include "runtime/javaCalls.hpp" 67 #include "runtime/jfieldIDWorkaround.hpp" 68 #include "runtime/orderAccess.inline.hpp" 69 #include "runtime/reflection.hpp" 70 #include "runtime/sharedRuntime.hpp" 71 #include "runtime/signature.hpp" 72 #include "runtime/thread.inline.hpp" 73 #include "runtime/vm_operations.hpp" 74 #include "services/memTracker.hpp" 75 #include "services/runtimeService.hpp" 76 #include "trace/tracing.hpp" 77 #include "utilities/defaultStream.hpp" 78 #include "utilities/dtrace.hpp" 79 #include "utilities/events.hpp" 80 #include "utilities/histogram.hpp" 81 #include "utilities/macros.hpp" 82 #if INCLUDE_ALL_GCS 83 #include "gc/g1/g1SATBCardTableModRefBS.hpp" 84 #endif // INCLUDE_ALL_GCS 85 #if INCLUDE_JVMCI 86 #include "jvmci/jvmciCompiler.hpp" 87 #include "jvmci/jvmciRuntime.hpp" 88 #endif 89 90 static jint CurrentVersion = JNI_VERSION_1_8; 91 92 #ifdef _WIN32 93 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 94 #endif 95 96 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 97 // '-return' probe regardless of the return path is taken out of the function. 98 // Methods that have multiple return paths use this to avoid having to 99 // instrument each return path. Methods that use CHECK or THROW must use this 100 // since those macros can cause an immedate uninstrumented return. 101 // 102 // In order to get the return value, a reference to the variable containing 103 // the return value must be passed to the contructor of the object, and 104 // the return value must be set before return (since the mark object has 105 // a reference to it). 106 // 107 // Example: 108 // DT_RETURN_MARK_DECL(SomeFunc, int); 109 // JNI_ENTRY(int, SomeFunc, ...) 110 // int return_value = 0; 111 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 112 // foo(CHECK_0) 113 // return_value = 5; 114 // return return_value; 115 // JNI_END 116 #define DT_RETURN_MARK_DECL(name, type, probe) \ 117 DTRACE_ONLY( \ 118 class DTraceReturnProbeMark_##name { \ 119 public: \ 120 const type& _ret_ref; \ 121 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 122 ~DTraceReturnProbeMark_##name() { \ 123 probe; \ 124 } \ 125 } \ 126 ) 127 // Void functions are simpler since there's no return value 128 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 129 DTRACE_ONLY( \ 130 class DTraceReturnProbeMark_##name { \ 131 public: \ 132 ~DTraceReturnProbeMark_##name() { \ 133 probe; \ 134 } \ 135 } \ 136 ) 137 138 // Place these macros in the function to mark the return. Non-void 139 // functions need the type and address of the return value. 140 #define DT_RETURN_MARK(name, type, ref) \ 141 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 142 #define DT_VOID_RETURN_MARK(name) \ 143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 144 145 146 // Use these to select distinct code for floating-point vs. non-floating point 147 // situations. Used from within common macros where we need slightly 148 // different behavior for Float/Double 149 #define FP_SELECT_Boolean(intcode, fpcode) intcode 150 #define FP_SELECT_Byte(intcode, fpcode) intcode 151 #define FP_SELECT_Char(intcode, fpcode) intcode 152 #define FP_SELECT_Short(intcode, fpcode) intcode 153 #define FP_SELECT_Object(intcode, fpcode) intcode 154 #define FP_SELECT_Int(intcode, fpcode) intcode 155 #define FP_SELECT_Long(intcode, fpcode) intcode 156 #define FP_SELECT_Float(intcode, fpcode) fpcode 157 #define FP_SELECT_Double(intcode, fpcode) fpcode 158 #define FP_SELECT(TypeName, intcode, fpcode) \ 159 FP_SELECT_##TypeName(intcode, fpcode) 160 161 #define COMMA , 162 163 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 164 // (dtrace doesn't do FP yet) 165 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 166 FP_SELECT(TypeName, \ 167 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 168 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 171 172 173 // out-of-line helpers for class jfieldIDWorkaround: 174 175 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 176 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 177 uintptr_t as_uint = (uintptr_t) id; 178 intptr_t offset = raw_instance_offset(id); 179 if (is_checked_jfieldID(id)) { 180 if (!klass_hash_ok(k, id)) { 181 return false; 182 } 183 } 184 return InstanceKlass::cast(k)->contains_field_offset(offset); 185 } else { 186 JNIid* result = (JNIid*) id; 187 #ifdef ASSERT 188 return result != NULL && result->is_static_field_id(); 189 #else 190 return result != NULL; 191 #endif 192 } 193 } 194 195 196 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 197 if (offset <= small_offset_mask) { 198 Klass* field_klass = k; 199 Klass* super_klass = field_klass->super(); 200 // With compressed oops the most super class with nonstatic fields would 201 // be the owner of fields embedded in the header. 202 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 203 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 204 field_klass = super_klass; // super contains the field also 205 super_klass = field_klass->super(); 206 } 207 debug_only(No_Safepoint_Verifier nosafepoint;) 208 uintptr_t klass_hash = field_klass->identity_hash(); 209 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 210 } else { 211 #if 0 212 #ifndef PRODUCT 213 { 214 ResourceMark rm; 215 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 216 } 217 #endif 218 #endif 219 return 0; 220 } 221 } 222 223 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 224 uintptr_t as_uint = (uintptr_t) id; 225 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 226 do { 227 debug_only(No_Safepoint_Verifier nosafepoint;) 228 // Could use a non-blocking query for identity_hash here... 229 if ((k->identity_hash() & klass_mask) == klass_hash) 230 return true; 231 k = k->super(); 232 } while (k != NULL); 233 return false; 234 } 235 236 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 237 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 238 uintptr_t as_uint = (uintptr_t) id; 239 intptr_t offset = raw_instance_offset(id); 240 if (VerifyJNIFields) { 241 if (is_checked_jfieldID(id)) { 242 guarantee(klass_hash_ok(k, id), 243 "Bug in native code: jfieldID class must match object"); 244 } else { 245 #if 0 246 #ifndef PRODUCT 247 if (Verbose) { 248 ResourceMark rm; 249 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 250 } 251 #endif 252 #endif 253 } 254 } 255 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 256 "Bug in native code: jfieldID offset must address interior of object"); 257 } 258 259 // Wrapper to trace JNI functions 260 261 #ifdef ASSERT 262 Histogram* JNIHistogram; 263 static volatile jint JNIHistogram_lock = 0; 264 265 class JNIHistogramElement : public HistogramElement { 266 public: 267 JNIHistogramElement(const char* name); 268 }; 269 270 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 271 _name = elementName; 272 uintx count = 0; 273 274 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 275 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 276 count +=1; 277 if ( (WarnOnStalledSpinLock > 0) 278 && (count % WarnOnStalledSpinLock == 0)) { 279 warning("JNIHistogram_lock seems to be stalled"); 280 } 281 } 282 } 283 284 285 if(JNIHistogram == NULL) 286 JNIHistogram = new Histogram("JNI Call Counts",100); 287 288 JNIHistogram->add_element(this); 289 Atomic::dec(&JNIHistogram_lock); 290 } 291 292 #define JNICountWrapper(arg) \ 293 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 294 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 295 if (e != NULL) e->increment_count() 296 #define JNIWrapper(arg) JNICountWrapper(arg); 297 #else 298 #define JNIWrapper(arg) 299 #endif 300 301 302 // Implementation of JNI entries 303 304 DT_RETURN_MARK_DECL(DefineClass, jclass 305 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 306 307 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 308 const jbyte *buf, jsize bufLen)) 309 JNIWrapper("DefineClass"); 310 311 HOTSPOT_JNI_DEFINECLASS_ENTRY( 312 env, (char*) name, loaderRef, (char*) buf, bufLen); 313 314 jclass cls = NULL; 315 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 316 317 TempNewSymbol class_name = NULL; 318 // Since exceptions can be thrown, class initialization can take place 319 // if name is NULL no check for class name in .class stream has to be made. 320 if (name != NULL) { 321 const int str_len = (int)strlen(name); 322 if (str_len > Symbol::max_length()) { 323 // It's impossible to create this class; the name cannot fit 324 // into the constant pool. 325 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 326 } 327 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 328 } 329 ResourceMark rm(THREAD); 330 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 331 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 332 333 if (UsePerfData && !class_loader.is_null()) { 334 // check whether the current caller thread holds the lock or not. 335 // If not, increment the corresponding counter 336 if (ObjectSynchronizer:: 337 query_lock_ownership((JavaThread*)THREAD, class_loader) != 338 ObjectSynchronizer::owner_self) { 339 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 340 } 341 } 342 Klass* k = SystemDictionary::resolve_from_stream(class_name, 343 class_loader, 344 Handle(), 345 &st, 346 CHECK_NULL); 347 348 if (log_is_enabled(Info, classresolve) && k != NULL) { 349 trace_class_resolution(k); 350 } 351 352 cls = (jclass)JNIHandles::make_local( 353 env, k->java_mirror()); 354 return cls; 355 JNI_END 356 357 358 359 static bool first_time_FindClass = true; 360 361 DT_RETURN_MARK_DECL(FindClass, jclass 362 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 363 364 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 365 JNIWrapper("FindClass"); 366 367 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 368 369 jclass result = NULL; 370 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 371 372 // Remember if we are the first invocation of jni_FindClass 373 bool first_time = first_time_FindClass; 374 first_time_FindClass = false; 375 376 // Sanity check the name: it cannot be null or larger than the maximum size 377 // name we can fit in the constant pool. 378 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 379 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 380 } 381 382 //%note jni_3 383 Handle loader; 384 Handle protection_domain; 385 // Find calling class 386 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 387 if (k.not_null()) { 388 loader = Handle(THREAD, k->class_loader()); 389 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 390 // in the correct class context. 391 if (loader.is_null() && 392 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 393 JavaValue result(T_OBJECT); 394 JavaCalls::call_static(&result, k, 395 vmSymbols::getFromClass_name(), 396 vmSymbols::void_class_signature(), 397 thread); 398 if (HAS_PENDING_EXCEPTION) { 399 Handle ex(thread, thread->pending_exception()); 400 CLEAR_PENDING_EXCEPTION; 401 THROW_HANDLE_0(ex); 402 } 403 oop mirror = (oop) result.get_jobject(); 404 loader = Handle(THREAD, 405 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 406 protection_domain = Handle(THREAD, 407 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 408 } 409 } else { 410 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 411 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 412 } 413 414 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 415 result = find_class_from_class_loader(env, sym, true, loader, 416 protection_domain, true, thread); 417 418 if (log_is_enabled(Info, classresolve) && result != NULL) { 419 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 420 } 421 422 // If we were the first invocation of jni_FindClass, we enable compilation again 423 // rather than just allowing invocation counter to overflow and decay. 424 // Controlled by flag DelayCompilationDuringStartup. 425 if (first_time && !CompileTheWorld) 426 CompilationPolicy::completed_vm_startup(); 427 428 return result; 429 JNI_END 430 431 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 432 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 433 434 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 435 JNIWrapper("FromReflectedMethod"); 436 437 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 438 439 jmethodID ret = NULL; 440 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 441 442 // method is a handle to a java.lang.reflect.Method object 443 oop reflected = JNIHandles::resolve_non_null(method); 444 oop mirror = NULL; 445 int slot = 0; 446 447 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 448 mirror = java_lang_reflect_Constructor::clazz(reflected); 449 slot = java_lang_reflect_Constructor::slot(reflected); 450 } else { 451 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 452 mirror = java_lang_reflect_Method::clazz(reflected); 453 slot = java_lang_reflect_Method::slot(reflected); 454 } 455 Klass* k = java_lang_Class::as_Klass(mirror); 456 457 KlassHandle k1(THREAD, k); 458 // Make sure class is initialized before handing id's out to methods 459 k1()->initialize(CHECK_NULL); 460 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 461 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 462 return ret; 463 JNI_END 464 465 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 466 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 467 468 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 469 JNIWrapper("FromReflectedField"); 470 471 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 472 473 jfieldID ret = NULL; 474 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 475 476 // field is a handle to a java.lang.reflect.Field object 477 oop reflected = JNIHandles::resolve_non_null(field); 478 oop mirror = java_lang_reflect_Field::clazz(reflected); 479 Klass* k = java_lang_Class::as_Klass(mirror); 480 int slot = java_lang_reflect_Field::slot(reflected); 481 int modifiers = java_lang_reflect_Field::modifiers(reflected); 482 483 KlassHandle k1(THREAD, k); 484 // Make sure class is initialized before handing id's out to fields 485 k1()->initialize(CHECK_NULL); 486 487 // First check if this is a static field 488 if (modifiers & JVM_ACC_STATIC) { 489 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 490 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 491 assert(id != NULL, "corrupt Field object"); 492 debug_only(id->set_is_static_field_id();) 493 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 494 ret = jfieldIDWorkaround::to_static_jfieldID(id); 495 return ret; 496 } 497 498 // The slot is the index of the field description in the field-array 499 // The jfieldID is the offset of the field within the object 500 // It may also have hash bits for k, if VerifyJNIFields is turned on. 501 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 502 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 503 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 504 return ret; 505 JNI_END 506 507 508 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 509 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 510 511 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 512 JNIWrapper("ToReflectedMethod"); 513 514 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 515 516 jobject ret = NULL; 517 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 518 519 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 520 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 521 oop reflection_method; 522 if (m->is_initializer()) { 523 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 524 } else { 525 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 526 } 527 ret = JNIHandles::make_local(env, reflection_method); 528 return ret; 529 JNI_END 530 531 DT_RETURN_MARK_DECL(GetSuperclass, jclass 532 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 533 534 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 535 JNIWrapper("GetSuperclass"); 536 537 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 538 539 jclass obj = NULL; 540 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 541 542 oop mirror = JNIHandles::resolve_non_null(sub); 543 // primitive classes return NULL 544 if (java_lang_Class::is_primitive(mirror)) return NULL; 545 546 // Rules of Class.getSuperClass as implemented by KLass::java_super: 547 // arrays return Object 548 // interfaces return NULL 549 // proper classes return Klass::super() 550 Klass* k = java_lang_Class::as_Klass(mirror); 551 if (k->is_interface()) return NULL; 552 553 // return mirror for superclass 554 Klass* super = k->java_super(); 555 // super2 is the value computed by the compiler's getSuperClass intrinsic: 556 debug_only(Klass* super2 = ( k->is_array_klass() 557 ? SystemDictionary::Object_klass() 558 : k->super() ) ); 559 assert(super == super2, 560 "java_super computation depends on interface, array, other super"); 561 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 562 return obj; 563 JNI_END 564 565 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 566 JNIWrapper("IsSubclassOf"); 567 568 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 569 570 oop sub_mirror = JNIHandles::resolve_non_null(sub); 571 oop super_mirror = JNIHandles::resolve_non_null(super); 572 if (java_lang_Class::is_primitive(sub_mirror) || 573 java_lang_Class::is_primitive(super_mirror)) { 574 jboolean ret = (sub_mirror == super_mirror); 575 576 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 577 return ret; 578 } 579 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 580 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 581 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 582 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 583 JNI_TRUE : JNI_FALSE; 584 585 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 586 return ret; 587 JNI_END 588 589 590 DT_RETURN_MARK_DECL(Throw, jint 591 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 592 593 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 594 JNIWrapper("Throw"); 595 596 HOTSPOT_JNI_THROW_ENTRY(env, obj); 597 598 jint ret = JNI_OK; 599 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 600 601 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 602 ShouldNotReachHere(); 603 return 0; // Mute compiler. 604 JNI_END 605 606 607 DT_RETURN_MARK_DECL(ThrowNew, jint 608 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 609 610 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 611 JNIWrapper("ThrowNew"); 612 613 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 614 615 jint ret = JNI_OK; 616 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 617 618 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 619 Symbol* name = k->name(); 620 Handle class_loader (THREAD, k->class_loader()); 621 Handle protection_domain (THREAD, k->protection_domain()); 622 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 623 ShouldNotReachHere(); 624 return 0; // Mute compiler. 625 JNI_END 626 627 628 // JNI functions only transform a pending async exception to a synchronous 629 // exception in ExceptionOccurred and ExceptionCheck calls, since 630 // delivering an async exception in other places won't change the native 631 // code's control flow and would be harmful when native code further calls 632 // JNI functions with a pending exception. Async exception is also checked 633 // during the call, so ExceptionOccurred/ExceptionCheck won't return 634 // false but deliver the async exception at the very end during 635 // state transition. 636 637 static void jni_check_async_exceptions(JavaThread *thread) { 638 assert(thread == Thread::current(), "must be itself"); 639 thread->check_and_handle_async_exceptions(); 640 } 641 642 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 643 JNIWrapper("ExceptionOccurred"); 644 645 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 646 647 jni_check_async_exceptions(thread); 648 oop exception = thread->pending_exception(); 649 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 650 651 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 652 return ret; 653 JNI_END 654 655 656 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 657 JNIWrapper("ExceptionDescribe"); 658 659 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 660 661 if (thread->has_pending_exception()) { 662 Handle ex(thread, thread->pending_exception()); 663 thread->clear_pending_exception(); 664 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 665 // Don't print anything if we are being killed. 666 } else { 667 jio_fprintf(defaultStream::error_stream(), "Exception "); 668 if (thread != NULL && thread->threadObj() != NULL) { 669 ResourceMark rm(THREAD); 670 jio_fprintf(defaultStream::error_stream(), 671 "in thread \"%s\" ", thread->get_thread_name()); 672 } 673 if (ex->is_a(SystemDictionary::Throwable_klass())) { 674 JavaValue result(T_VOID); 675 JavaCalls::call_virtual(&result, 676 ex, 677 KlassHandle(THREAD, 678 SystemDictionary::Throwable_klass()), 679 vmSymbols::printStackTrace_name(), 680 vmSymbols::void_method_signature(), 681 THREAD); 682 // If an exception is thrown in the call it gets thrown away. Not much 683 // we can do with it. The native code that calls this, does not check 684 // for the exception - hence, it might still be in the thread when DestroyVM gets 685 // called, potentially causing a few asserts to trigger - since no pending exception 686 // is expected. 687 CLEAR_PENDING_EXCEPTION; 688 } else { 689 ResourceMark rm(THREAD); 690 jio_fprintf(defaultStream::error_stream(), 691 ". Uncaught exception of type %s.", 692 ex->klass()->external_name()); 693 } 694 } 695 } 696 697 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 698 JNI_END 699 700 701 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 702 JNIWrapper("ExceptionClear"); 703 704 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 705 706 // The jni code might be using this API to clear java thrown exception. 707 // So just mark jvmti thread exception state as exception caught. 708 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 709 if (state != NULL && state->is_exception_detected()) { 710 state->set_exception_caught(); 711 } 712 thread->clear_pending_exception(); 713 714 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 715 JNI_END 716 717 718 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 719 JNIWrapper("FatalError"); 720 721 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 722 723 tty->print_cr("FATAL ERROR in native method: %s", msg); 724 thread->print_stack(); 725 os::abort(); // Dump core and abort 726 JNI_END 727 728 729 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 730 JNIWrapper("PushLocalFrame"); 731 732 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 733 734 //%note jni_11 735 if (capacity < 0 || 736 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 737 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 738 return JNI_ERR; 739 } 740 JNIHandleBlock* old_handles = thread->active_handles(); 741 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 742 assert(new_handles != NULL, "should not be NULL"); 743 new_handles->set_pop_frame_link(old_handles); 744 thread->set_active_handles(new_handles); 745 jint ret = JNI_OK; 746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 747 return ret; 748 JNI_END 749 750 751 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 752 JNIWrapper("PopLocalFrame"); 753 754 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 755 756 //%note jni_11 757 Handle result_handle(thread, JNIHandles::resolve(result)); 758 JNIHandleBlock* old_handles = thread->active_handles(); 759 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 760 if (new_handles != NULL) { 761 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 762 // This way code will still work if PopLocalFrame is called without a corresponding 763 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 764 // the release_block call will release the blocks. 765 thread->set_active_handles(new_handles); 766 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 767 JNIHandleBlock::release_block(old_handles, thread); // may block 768 result = JNIHandles::make_local(thread, result_handle()); 769 } 770 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 771 return result; 772 JNI_END 773 774 775 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 776 JNIWrapper("NewGlobalRef"); 777 778 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 779 780 Handle ref_handle(thread, JNIHandles::resolve(ref)); 781 jobject ret = JNIHandles::make_global(ref_handle); 782 783 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 784 return ret; 785 JNI_END 786 787 // Must be JNI_ENTRY (with HandleMark) 788 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 789 JNIWrapper("DeleteGlobalRef"); 790 791 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 792 793 JNIHandles::destroy_global(ref); 794 795 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 796 JNI_END 797 798 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 799 JNIWrapper("DeleteLocalRef"); 800 801 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 802 803 JNIHandles::destroy_local(obj); 804 805 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 806 JNI_END 807 808 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 809 JNIWrapper("IsSameObject"); 810 811 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 812 813 oop a = JNIHandles::resolve(r1); 814 oop b = JNIHandles::resolve(r2); 815 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 816 817 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 818 return ret; 819 JNI_END 820 821 822 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 823 JNIWrapper("NewLocalRef"); 824 825 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 826 827 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 828 829 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 830 return ret; 831 JNI_END 832 833 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 834 JNIWrapper("EnsureLocalCapacity"); 835 836 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 837 838 jint ret; 839 if (capacity >= 0 && 840 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 841 ret = JNI_OK; 842 } else { 843 ret = JNI_ERR; 844 } 845 846 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 847 return ret; 848 JNI_END 849 850 // Return the Handle Type 851 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 852 JNIWrapper("GetObjectRefType"); 853 854 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 855 856 jobjectRefType ret; 857 if (JNIHandles::is_local_handle(thread, obj) || 858 JNIHandles::is_frame_handle(thread, obj)) 859 ret = JNILocalRefType; 860 else if (JNIHandles::is_global_handle(obj)) 861 ret = JNIGlobalRefType; 862 else if (JNIHandles::is_weak_global_handle(obj)) 863 ret = JNIWeakGlobalRefType; 864 else 865 ret = JNIInvalidRefType; 866 867 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 868 return ret; 869 JNI_END 870 871 872 class JNI_ArgumentPusher : public SignatureIterator { 873 protected: 874 JavaCallArguments* _arguments; 875 876 virtual void get_bool () = 0; 877 virtual void get_char () = 0; 878 virtual void get_short () = 0; 879 virtual void get_byte () = 0; 880 virtual void get_int () = 0; 881 virtual void get_long () = 0; 882 virtual void get_float () = 0; 883 virtual void get_double () = 0; 884 virtual void get_object () = 0; 885 886 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 887 this->_return_type = T_ILLEGAL; 888 _arguments = NULL; 889 } 890 891 public: 892 virtual void iterate( uint64_t fingerprint ) = 0; 893 894 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 895 896 inline void do_bool() { if (!is_return_type()) get_bool(); } 897 inline void do_char() { if (!is_return_type()) get_char(); } 898 inline void do_short() { if (!is_return_type()) get_short(); } 899 inline void do_byte() { if (!is_return_type()) get_byte(); } 900 inline void do_int() { if (!is_return_type()) get_int(); } 901 inline void do_long() { if (!is_return_type()) get_long(); } 902 inline void do_float() { if (!is_return_type()) get_float(); } 903 inline void do_double() { if (!is_return_type()) get_double(); } 904 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 905 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 906 inline void do_void() { } 907 908 JavaCallArguments* arguments() { return _arguments; } 909 void push_receiver(Handle h) { _arguments->push_oop(h); } 910 }; 911 912 913 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 914 protected: 915 va_list _ap; 916 917 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 918 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 919 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 920 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 921 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 922 923 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 924 925 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 926 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 927 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 928 inline void get_object() { jobject l = va_arg(_ap, jobject); 929 _arguments->push_oop(Handle((oop *)l, false)); } 930 931 inline void set_ap(va_list rap) { 932 #ifdef va_copy 933 va_copy(_ap, rap); 934 #elif defined (__va_copy) 935 __va_copy(_ap, rap); 936 #else 937 _ap = rap; 938 #endif 939 } 940 941 public: 942 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 943 : JNI_ArgumentPusher(signature) { 944 set_ap(rap); 945 } 946 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 947 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 948 set_ap(rap); 949 } 950 951 // Optimized path if we have the bitvector form of signature 952 void iterate( uint64_t fingerprint ) { 953 if (fingerprint == (uint64_t)CONST64(-1)) { 954 SignatureIterator::iterate(); // Must be too many arguments 955 } else { 956 _return_type = (BasicType)((fingerprint >> static_feature_size) & 957 result_feature_mask); 958 959 assert(fingerprint, "Fingerprint should not be 0"); 960 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 961 while ( 1 ) { 962 switch ( fingerprint & parameter_feature_mask ) { 963 case bool_parm: 964 case char_parm: 965 case short_parm: 966 case byte_parm: 967 case int_parm: 968 get_int(); 969 break; 970 case obj_parm: 971 get_object(); 972 break; 973 case long_parm: 974 get_long(); 975 break; 976 case float_parm: 977 get_float(); 978 break; 979 case double_parm: 980 get_double(); 981 break; 982 case done_parm: 983 return; 984 break; 985 default: 986 ShouldNotReachHere(); 987 break; 988 } 989 fingerprint >>= parameter_feature_size; 990 } 991 } 992 } 993 }; 994 995 996 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 997 protected: 998 const jvalue *_ap; 999 1000 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 1001 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1002 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1003 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1004 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1005 1006 inline void get_long() { _arguments->push_long((_ap++)->j); } 1007 inline void get_float() { _arguments->push_float((_ap++)->f); } 1008 inline void get_double() { _arguments->push_double((_ap++)->d);} 1009 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1010 1011 inline void set_ap(const jvalue *rap) { _ap = rap; } 1012 1013 public: 1014 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1015 : JNI_ArgumentPusher(signature) { 1016 set_ap(rap); 1017 } 1018 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1019 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1020 set_ap(rap); 1021 } 1022 1023 // Optimized path if we have the bitvector form of signature 1024 void iterate( uint64_t fingerprint ) { 1025 if (fingerprint == (uint64_t)CONST64(-1)) { 1026 SignatureIterator::iterate(); // Must be too many arguments 1027 } else { 1028 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1029 result_feature_mask); 1030 assert(fingerprint, "Fingerprint should not be 0"); 1031 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1032 while ( 1 ) { 1033 switch ( fingerprint & parameter_feature_mask ) { 1034 case bool_parm: 1035 get_bool(); 1036 break; 1037 case char_parm: 1038 get_char(); 1039 break; 1040 case short_parm: 1041 get_short(); 1042 break; 1043 case byte_parm: 1044 get_byte(); 1045 break; 1046 case int_parm: 1047 get_int(); 1048 break; 1049 case obj_parm: 1050 get_object(); 1051 break; 1052 case long_parm: 1053 get_long(); 1054 break; 1055 case float_parm: 1056 get_float(); 1057 break; 1058 case double_parm: 1059 get_double(); 1060 break; 1061 case done_parm: 1062 return; 1063 break; 1064 default: 1065 ShouldNotReachHere(); 1066 break; 1067 } 1068 fingerprint >>= parameter_feature_size; 1069 } 1070 } 1071 } 1072 }; 1073 1074 1075 enum JNICallType { 1076 JNI_STATIC, 1077 JNI_VIRTUAL, 1078 JNI_NONVIRTUAL 1079 }; 1080 1081 1082 1083 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1084 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1085 1086 // Create object to hold arguments for the JavaCall, and associate it with 1087 // the jni parser 1088 ResourceMark rm(THREAD); 1089 int number_of_parameters = method->size_of_parameters(); 1090 JavaCallArguments java_args(number_of_parameters); 1091 args->set_java_argument_object(&java_args); 1092 1093 assert(method->is_static(), "method should be static"); 1094 1095 // Fill out JavaCallArguments object 1096 args->iterate( Fingerprinter(method).fingerprint() ); 1097 // Initialize result type 1098 result->set_type(args->get_ret_type()); 1099 1100 // Invoke the method. Result is returned as oop. 1101 JavaCalls::call(result, method, &java_args, CHECK); 1102 1103 // Convert result 1104 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1105 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1106 } 1107 } 1108 1109 1110 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1111 oop recv = JNIHandles::resolve(receiver); 1112 if (recv == NULL) { 1113 THROW(vmSymbols::java_lang_NullPointerException()); 1114 } 1115 Handle h_recv(THREAD, recv); 1116 1117 int number_of_parameters; 1118 Method* selected_method; 1119 { 1120 Method* m = Method::resolve_jmethod_id(method_id); 1121 number_of_parameters = m->size_of_parameters(); 1122 Klass* holder = m->method_holder(); 1123 if (call_type != JNI_VIRTUAL) { 1124 selected_method = m; 1125 } else if (!m->has_itable_index()) { 1126 // non-interface call -- for that little speed boost, don't handlize 1127 debug_only(No_Safepoint_Verifier nosafepoint;) 1128 // jni_GetMethodID makes sure class is linked and initialized 1129 // so m should have a valid vtable index. 1130 assert(m->valid_vtable_index(), "no valid vtable index"); 1131 int vtbl_index = m->vtable_index(); 1132 if (vtbl_index != Method::nonvirtual_vtable_index) { 1133 Klass* k = h_recv->klass(); 1134 // k might be an arrayKlassOop but all vtables start at 1135 // the same place. The cast is to avoid virtual call and assertion. 1136 InstanceKlass *ik = (InstanceKlass*)k; 1137 selected_method = ik->method_at_vtable(vtbl_index); 1138 } else { 1139 // final method 1140 selected_method = m; 1141 } 1142 } else { 1143 // interface call 1144 KlassHandle h_holder(THREAD, holder); 1145 1146 int itbl_index = m->itable_index(); 1147 Klass* k = h_recv->klass(); 1148 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1149 } 1150 } 1151 1152 methodHandle method(THREAD, selected_method); 1153 1154 // Create object to hold arguments for the JavaCall, and associate it with 1155 // the jni parser 1156 ResourceMark rm(THREAD); 1157 JavaCallArguments java_args(number_of_parameters); 1158 args->set_java_argument_object(&java_args); 1159 1160 // handle arguments 1161 assert(!method->is_static(), "method should not be static"); 1162 args->push_receiver(h_recv); // Push jobject handle 1163 1164 // Fill out JavaCallArguments object 1165 args->iterate( Fingerprinter(method).fingerprint() ); 1166 // Initialize result type 1167 result->set_type(args->get_ret_type()); 1168 1169 // Invoke the method. Result is returned as oop. 1170 JavaCalls::call(result, method, &java_args, CHECK); 1171 1172 // Convert result 1173 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1174 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1175 } 1176 } 1177 1178 1179 static instanceOop alloc_object(jclass clazz, TRAPS) { 1180 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1181 if (k == NULL) { 1182 ResourceMark rm(THREAD); 1183 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1184 } 1185 k()->check_valid_for_instantiation(false, CHECK_NULL); 1186 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1187 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1188 return ih; 1189 } 1190 1191 DT_RETURN_MARK_DECL(AllocObject, jobject 1192 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1193 1194 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1195 JNIWrapper("AllocObject"); 1196 1197 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1198 1199 jobject ret = NULL; 1200 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1201 1202 instanceOop i = alloc_object(clazz, CHECK_NULL); 1203 ret = JNIHandles::make_local(env, i); 1204 return ret; 1205 JNI_END 1206 1207 DT_RETURN_MARK_DECL(NewObjectA, jobject 1208 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1209 1210 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1211 JNIWrapper("NewObjectA"); 1212 1213 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1214 1215 jobject obj = NULL; 1216 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1217 1218 instanceOop i = alloc_object(clazz, CHECK_NULL); 1219 obj = JNIHandles::make_local(env, i); 1220 JavaValue jvalue(T_VOID); 1221 JNI_ArgumentPusherArray ap(methodID, args); 1222 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1223 return obj; 1224 JNI_END 1225 1226 1227 DT_RETURN_MARK_DECL(NewObjectV, jobject 1228 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1229 1230 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1231 JNIWrapper("NewObjectV"); 1232 1233 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1234 1235 jobject obj = NULL; 1236 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1237 1238 instanceOop i = alloc_object(clazz, CHECK_NULL); 1239 obj = JNIHandles::make_local(env, i); 1240 JavaValue jvalue(T_VOID); 1241 JNI_ArgumentPusherVaArg ap(methodID, args); 1242 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1243 return obj; 1244 JNI_END 1245 1246 1247 DT_RETURN_MARK_DECL(NewObject, jobject 1248 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1249 1250 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1251 JNIWrapper("NewObject"); 1252 1253 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1254 1255 jobject obj = NULL; 1256 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1257 1258 instanceOop i = alloc_object(clazz, CHECK_NULL); 1259 obj = JNIHandles::make_local(env, i); 1260 va_list args; 1261 va_start(args, methodID); 1262 JavaValue jvalue(T_VOID); 1263 JNI_ArgumentPusherVaArg ap(methodID, args); 1264 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1265 va_end(args); 1266 return obj; 1267 JNI_END 1268 1269 1270 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1271 JNIWrapper("GetObjectClass"); 1272 1273 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1274 1275 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1276 jclass ret = 1277 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1278 1279 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1280 return ret; 1281 JNI_END 1282 1283 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1284 JNIWrapper("IsInstanceOf"); 1285 1286 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1287 1288 jboolean ret = JNI_TRUE; 1289 if (obj != NULL) { 1290 ret = JNI_FALSE; 1291 Klass* k = java_lang_Class::as_Klass( 1292 JNIHandles::resolve_non_null(clazz)); 1293 if (k != NULL) { 1294 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1295 } 1296 } 1297 1298 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1299 return ret; 1300 JNI_END 1301 1302 1303 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1304 const char *sig, bool is_static, TRAPS) { 1305 // %%%% This code should probably just call into a method in the LinkResolver 1306 // 1307 // The class should have been loaded (we have an instance of the class 1308 // passed in) so the method and signature should already be in the symbol 1309 // table. If they're not there, the method doesn't exist. 1310 const char *name_to_probe = (name_str == NULL) 1311 ? vmSymbols::object_initializer_name()->as_C_string() 1312 : name_str; 1313 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1314 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1315 1316 if (name == NULL || signature == NULL) { 1317 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1318 } 1319 1320 // Throw a NoSuchMethodError exception if we have an instance of a 1321 // primitive java.lang.Class 1322 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1323 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1324 } 1325 1326 KlassHandle klass(THREAD, 1327 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1328 1329 // Make sure class is linked and initialized before handing id's out to 1330 // Method*s. 1331 klass()->initialize(CHECK_NULL); 1332 1333 Method* m; 1334 if (name == vmSymbols::object_initializer_name() || 1335 name == vmSymbols::class_initializer_name()) { 1336 // Never search superclasses for constructors 1337 if (klass->is_instance_klass()) { 1338 m = InstanceKlass::cast(klass())->find_method(name, signature); 1339 } else { 1340 m = NULL; 1341 } 1342 } else { 1343 m = klass->lookup_method(name, signature); 1344 if (m == NULL && klass->is_instance_klass()) { 1345 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1346 } 1347 } 1348 if (m == NULL || (m->is_static() != is_static)) { 1349 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1350 } 1351 return m->jmethod_id(); 1352 } 1353 1354 1355 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1356 const char *name, const char *sig)) 1357 JNIWrapper("GetMethodID"); 1358 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1359 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1360 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1361 return ret; 1362 JNI_END 1363 1364 1365 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1366 const char *name, const char *sig)) 1367 JNIWrapper("GetStaticMethodID"); 1368 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1369 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1370 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1371 return ret; 1372 JNI_END 1373 1374 1375 1376 // 1377 // Calling Methods 1378 // 1379 1380 1381 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1382 , EntryProbe, ReturnProbe) \ 1383 \ 1384 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1385 , ReturnProbe); \ 1386 \ 1387 JNI_ENTRY(ResultType, \ 1388 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1389 JNIWrapper("Call" XSTR(Result) "Method"); \ 1390 \ 1391 EntryProbe; \ 1392 ResultType ret = 0;\ 1393 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1394 (const ResultType&)ret);\ 1395 \ 1396 va_list args; \ 1397 va_start(args, methodID); \ 1398 JavaValue jvalue(Tag); \ 1399 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1400 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1401 va_end(args); \ 1402 ret = jvalue.get_##ResultType(); \ 1403 return ret;\ 1404 JNI_END 1405 1406 // the runtime type of subword integral basic types is integer 1407 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1408 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1409 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1410 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1411 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1412 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1413 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1414 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1415 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1416 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1417 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1418 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1419 1420 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1421 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1422 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1423 DEFINE_CALLMETHOD(jint, Int, T_INT, 1424 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1425 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1426 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1427 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1428 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1429 // Float and double probes don't return value because dtrace doesn't currently support it 1430 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1431 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1432 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1433 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1434 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1435 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1436 1437 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1438 , EntryProbe, ReturnProbe) \ 1439 \ 1440 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1441 , ReturnProbe); \ 1442 \ 1443 JNI_ENTRY(ResultType, \ 1444 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1445 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1446 \ 1447 EntryProbe;\ 1448 ResultType ret = 0;\ 1449 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1450 (const ResultType&)ret);\ 1451 \ 1452 JavaValue jvalue(Tag); \ 1453 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1454 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1455 ret = jvalue.get_##ResultType(); \ 1456 return ret;\ 1457 JNI_END 1458 1459 // the runtime type of subword integral basic types is integer 1460 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1461 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1462 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1463 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1464 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1465 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1466 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1467 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1468 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1469 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1470 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1471 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1472 1473 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1474 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1475 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1476 DEFINE_CALLMETHODV(jint, Int, T_INT, 1477 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1478 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1479 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1480 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1481 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1482 // Float and double probes don't return value because dtrace doesn't currently support it 1483 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1484 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1485 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1486 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1487 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1488 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1489 1490 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1491 , EntryProbe, ReturnProbe) \ 1492 \ 1493 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1494 , ReturnProbe); \ 1495 \ 1496 JNI_ENTRY(ResultType, \ 1497 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1498 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1499 EntryProbe; \ 1500 ResultType ret = 0;\ 1501 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1502 (const ResultType&)ret);\ 1503 \ 1504 JavaValue jvalue(Tag); \ 1505 JNI_ArgumentPusherArray ap(methodID, args); \ 1506 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1507 ret = jvalue.get_##ResultType(); \ 1508 return ret;\ 1509 JNI_END 1510 1511 // the runtime type of subword integral basic types is integer 1512 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1513 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1514 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1515 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1516 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1517 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1518 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1519 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1520 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1521 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1522 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1523 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1524 1525 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1526 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1527 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1528 DEFINE_CALLMETHODA(jint, Int, T_INT, 1529 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1530 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1531 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1532 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1533 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1534 // Float and double probes don't return value because dtrace doesn't currently support it 1535 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1536 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1537 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1538 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1539 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1540 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1541 1542 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1544 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1545 1546 1547 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1548 JNIWrapper("CallVoidMethod"); 1549 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1550 DT_VOID_RETURN_MARK(CallVoidMethod); 1551 1552 va_list args; 1553 va_start(args, methodID); 1554 JavaValue jvalue(T_VOID); 1555 JNI_ArgumentPusherVaArg ap(methodID, args); 1556 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1557 va_end(args); 1558 JNI_END 1559 1560 1561 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1562 JNIWrapper("CallVoidMethodV"); 1563 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1564 DT_VOID_RETURN_MARK(CallVoidMethodV); 1565 1566 JavaValue jvalue(T_VOID); 1567 JNI_ArgumentPusherVaArg ap(methodID, args); 1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1569 JNI_END 1570 1571 1572 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1573 JNIWrapper("CallVoidMethodA"); 1574 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1575 DT_VOID_RETURN_MARK(CallVoidMethodA); 1576 1577 JavaValue jvalue(T_VOID); 1578 JNI_ArgumentPusherArray ap(methodID, args); 1579 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1580 JNI_END 1581 1582 1583 1584 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1585 , EntryProbe, ReturnProbe) \ 1586 \ 1587 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1588 , ReturnProbe);\ 1589 \ 1590 JNI_ENTRY(ResultType, \ 1591 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1592 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1593 \ 1594 EntryProbe;\ 1595 ResultType ret;\ 1596 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1597 (const ResultType&)ret);\ 1598 \ 1599 va_list args; \ 1600 va_start(args, methodID); \ 1601 JavaValue jvalue(Tag); \ 1602 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1603 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1604 va_end(args); \ 1605 ret = jvalue.get_##ResultType(); \ 1606 return ret;\ 1607 JNI_END 1608 1609 // the runtime type of subword integral basic types is integer 1610 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1611 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1612 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1613 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1614 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1615 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1616 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1617 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1618 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1619 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1620 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1621 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1622 1623 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1624 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1625 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1626 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1627 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1628 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1629 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1630 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1631 // Float and double probes don't return value because dtrace doesn't currently support it 1632 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1633 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1634 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1635 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1636 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1637 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1638 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1639 1640 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1641 , EntryProbe, ReturnProbe) \ 1642 \ 1643 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1644 , ReturnProbe);\ 1645 \ 1646 JNI_ENTRY(ResultType, \ 1647 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1648 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1649 \ 1650 EntryProbe;\ 1651 ResultType ret;\ 1652 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1653 (const ResultType&)ret);\ 1654 \ 1655 JavaValue jvalue(Tag); \ 1656 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1657 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1658 ret = jvalue.get_##ResultType(); \ 1659 return ret;\ 1660 JNI_END 1661 1662 // the runtime type of subword integral basic types is integer 1663 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1664 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1665 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1666 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1667 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1668 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1669 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1670 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1671 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1672 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1673 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1674 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1675 1676 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1677 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1678 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1679 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1680 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1681 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1682 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1683 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1684 // Float and double probes don't return value because dtrace doesn't currently support it 1685 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1686 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1687 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1688 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1689 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1690 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1691 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1692 1693 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1694 , EntryProbe, ReturnProbe) \ 1695 \ 1696 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1697 , ReturnProbe);\ 1698 \ 1699 JNI_ENTRY(ResultType, \ 1700 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1701 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1702 \ 1703 EntryProbe;\ 1704 ResultType ret;\ 1705 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1706 (const ResultType&)ret);\ 1707 \ 1708 JavaValue jvalue(Tag); \ 1709 JNI_ArgumentPusherArray ap(methodID, args); \ 1710 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1711 ret = jvalue.get_##ResultType(); \ 1712 return ret;\ 1713 JNI_END 1714 1715 // the runtime type of subword integral basic types is integer 1716 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1717 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1718 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1719 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1720 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1721 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1722 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1723 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1724 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1725 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1726 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1727 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1728 1729 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1730 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1731 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1732 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1733 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1734 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1735 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1736 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1737 // Float and double probes don't return value because dtrace doesn't currently support it 1738 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1739 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1740 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1741 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1742 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1743 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1744 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1745 1746 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1747 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1748 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1749 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1750 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1751 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1752 1753 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1754 JNIWrapper("CallNonvirtualVoidMethod"); 1755 1756 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1757 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1758 1759 va_list args; 1760 va_start(args, methodID); 1761 JavaValue jvalue(T_VOID); 1762 JNI_ArgumentPusherVaArg ap(methodID, args); 1763 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1764 va_end(args); 1765 JNI_END 1766 1767 1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1769 JNIWrapper("CallNonvirtualVoidMethodV"); 1770 1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1772 env, obj, cls, (uintptr_t) methodID); 1773 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1774 1775 JavaValue jvalue(T_VOID); 1776 JNI_ArgumentPusherVaArg ap(methodID, args); 1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1778 JNI_END 1779 1780 1781 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1782 JNIWrapper("CallNonvirtualVoidMethodA"); 1783 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1784 env, obj, cls, (uintptr_t) methodID); 1785 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1786 JavaValue jvalue(T_VOID); 1787 JNI_ArgumentPusherArray ap(methodID, args); 1788 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1789 JNI_END 1790 1791 1792 1793 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1794 , EntryProbe, ResultProbe) \ 1795 \ 1796 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1797 , ResultProbe); \ 1798 \ 1799 JNI_ENTRY(ResultType, \ 1800 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1801 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1802 \ 1803 EntryProbe; \ 1804 ResultType ret = 0;\ 1805 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1806 (const ResultType&)ret);\ 1807 \ 1808 va_list args; \ 1809 va_start(args, methodID); \ 1810 JavaValue jvalue(Tag); \ 1811 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1812 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1813 va_end(args); \ 1814 ret = jvalue.get_##ResultType(); \ 1815 return ret;\ 1816 JNI_END 1817 1818 // the runtime type of subword integral basic types is integer 1819 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1820 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1821 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1822 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1823 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1824 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1825 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1826 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1827 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1828 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1829 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1830 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1831 1832 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1833 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1834 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1835 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1836 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1837 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1838 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1839 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1840 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1841 // Float and double probes don't return value because dtrace doesn't currently support it 1842 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1843 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1844 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1845 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1846 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1847 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1848 1849 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1850 , EntryProbe, ResultProbe) \ 1851 \ 1852 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1853 , ResultProbe); \ 1854 \ 1855 JNI_ENTRY(ResultType, \ 1856 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1857 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1858 \ 1859 EntryProbe; \ 1860 ResultType ret = 0;\ 1861 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1862 (const ResultType&)ret);\ 1863 \ 1864 JavaValue jvalue(Tag); \ 1865 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1866 /* Make sure class is initialized before trying to invoke its method */ \ 1867 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1868 k()->initialize(CHECK_0); \ 1869 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1870 va_end(args); \ 1871 ret = jvalue.get_##ResultType(); \ 1872 return ret;\ 1873 JNI_END 1874 1875 // the runtime type of subword integral basic types is integer 1876 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1877 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1878 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1879 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1880 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1881 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1882 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1883 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1884 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1885 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1886 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1887 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1888 1889 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1890 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1891 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1892 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1893 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1894 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1895 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1896 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1897 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1898 // Float and double probes don't return value because dtrace doesn't currently support it 1899 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1900 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1901 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1902 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1903 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1904 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1905 1906 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1907 , EntryProbe, ResultProbe) \ 1908 \ 1909 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1910 , ResultProbe); \ 1911 \ 1912 JNI_ENTRY(ResultType, \ 1913 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1914 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1915 \ 1916 EntryProbe; \ 1917 ResultType ret = 0;\ 1918 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1919 (const ResultType&)ret);\ 1920 \ 1921 JavaValue jvalue(Tag); \ 1922 JNI_ArgumentPusherArray ap(methodID, args); \ 1923 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1924 ret = jvalue.get_##ResultType(); \ 1925 return ret;\ 1926 JNI_END 1927 1928 // the runtime type of subword integral basic types is integer 1929 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1930 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1931 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1932 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1933 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1934 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1935 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1936 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1937 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1938 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1939 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1940 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1941 1942 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1943 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1944 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1945 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1946 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1947 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1948 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1949 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1950 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1951 // Float and double probes don't return value because dtrace doesn't currently support it 1952 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1953 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1954 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1955 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1956 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1957 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1958 1959 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1960 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1961 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1962 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1963 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1964 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1965 1966 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1967 JNIWrapper("CallStaticVoidMethod"); 1968 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1969 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1970 1971 va_list args; 1972 va_start(args, methodID); 1973 JavaValue jvalue(T_VOID); 1974 JNI_ArgumentPusherVaArg ap(methodID, args); 1975 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1976 va_end(args); 1977 JNI_END 1978 1979 1980 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1981 JNIWrapper("CallStaticVoidMethodV"); 1982 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1983 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1984 1985 JavaValue jvalue(T_VOID); 1986 JNI_ArgumentPusherVaArg ap(methodID, args); 1987 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1988 JNI_END 1989 1990 1991 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1992 JNIWrapper("CallStaticVoidMethodA"); 1993 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 1994 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1995 1996 JavaValue jvalue(T_VOID); 1997 JNI_ArgumentPusherArray ap(methodID, args); 1998 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1999 JNI_END 2000 2001 2002 // 2003 // Accessing Fields 2004 // 2005 2006 2007 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2008 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2009 2010 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2011 const char *name, const char *sig)) 2012 JNIWrapper("GetFieldID"); 2013 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2014 jfieldID ret = 0; 2015 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2016 2017 // The class should have been loaded (we have an instance of the class 2018 // passed in) so the field and signature should already be in the symbol 2019 // table. If they're not there, the field doesn't exist. 2020 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2021 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2022 if (fieldname == NULL || signame == NULL) { 2023 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2024 } 2025 KlassHandle k(THREAD, 2026 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2027 // Make sure class is initialized before handing id's out to fields 2028 k()->initialize(CHECK_NULL); 2029 2030 fieldDescriptor fd; 2031 if (!k()->is_instance_klass() || 2032 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2033 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2034 } 2035 2036 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2037 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2038 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2039 return ret; 2040 JNI_END 2041 2042 2043 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2044 JNIWrapper("GetObjectField"); 2045 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2046 oop o = JNIHandles::resolve_non_null(obj); 2047 Klass* k = o->klass(); 2048 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2049 // Keep JVMTI addition small and only check enabled flag here. 2050 // jni_GetField_probe() assumes that is okay to create handles. 2051 if (JvmtiExport::should_post_field_access()) { 2052 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2053 } 2054 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2055 #if INCLUDE_ALL_GCS 2056 // If G1 is enabled and we are accessing the value of the referent 2057 // field in a reference object then we need to register a non-null 2058 // referent with the SATB barrier. 2059 if (UseG1GC) { 2060 bool needs_barrier = false; 2061 2062 if (ret != NULL && 2063 offset == java_lang_ref_Reference::referent_offset && 2064 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2065 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2066 needs_barrier = true; 2067 } 2068 2069 if (needs_barrier) { 2070 oop referent = JNIHandles::resolve(ret); 2071 G1SATBCardTableModRefBS::enqueue(referent); 2072 } 2073 } 2074 #endif // INCLUDE_ALL_GCS 2075 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2076 return ret; 2077 JNI_END 2078 2079 2080 2081 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2082 , EntryProbe, ReturnProbe) \ 2083 \ 2084 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2085 , ReturnProbe); \ 2086 \ 2087 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2088 JNIWrapper("Get" XSTR(Result) "Field"); \ 2089 \ 2090 EntryProbe; \ 2091 Return ret = 0;\ 2092 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2093 \ 2094 oop o = JNIHandles::resolve_non_null(obj); \ 2095 Klass* k = o->klass(); \ 2096 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2097 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2098 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2099 /* and creates a ResetNoHandleMark. */ \ 2100 if (JvmtiExport::should_post_field_access()) { \ 2101 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2102 } \ 2103 ret = o->Fieldname##_field(offset); \ 2104 return ret; \ 2105 JNI_END 2106 2107 DEFINE_GETFIELD(jboolean, bool, Boolean 2108 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2109 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2110 DEFINE_GETFIELD(jbyte, byte, Byte 2111 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2112 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2113 DEFINE_GETFIELD(jchar, char, Char 2114 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2115 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2116 DEFINE_GETFIELD(jshort, short, Short 2117 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2118 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2119 DEFINE_GETFIELD(jint, int, Int 2120 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2121 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2122 DEFINE_GETFIELD(jlong, long, Long 2123 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2124 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2125 // Float and double probes don't return value because dtrace doesn't currently support it 2126 DEFINE_GETFIELD(jfloat, float, Float 2127 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2128 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2129 DEFINE_GETFIELD(jdouble, double, Double 2130 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2131 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2132 2133 address jni_GetBooleanField_addr() { 2134 return (address)jni_GetBooleanField; 2135 } 2136 address jni_GetByteField_addr() { 2137 return (address)jni_GetByteField; 2138 } 2139 address jni_GetCharField_addr() { 2140 return (address)jni_GetCharField; 2141 } 2142 address jni_GetShortField_addr() { 2143 return (address)jni_GetShortField; 2144 } 2145 address jni_GetIntField_addr() { 2146 return (address)jni_GetIntField; 2147 } 2148 address jni_GetLongField_addr() { 2149 return (address)jni_GetLongField; 2150 } 2151 address jni_GetFloatField_addr() { 2152 return (address)jni_GetFloatField; 2153 } 2154 address jni_GetDoubleField_addr() { 2155 return (address)jni_GetDoubleField; 2156 } 2157 2158 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2159 JNIWrapper("SetObjectField"); 2160 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2161 oop o = JNIHandles::resolve_non_null(obj); 2162 Klass* k = o->klass(); 2163 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2164 // Keep JVMTI addition small and only check enabled flag here. 2165 // jni_SetField_probe_nh() assumes that is not okay to create handles 2166 // and creates a ResetNoHandleMark. 2167 if (JvmtiExport::should_post_field_modification()) { 2168 jvalue field_value; 2169 field_value.l = value; 2170 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2171 } 2172 o->obj_field_put(offset, JNIHandles::resolve(value)); 2173 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2174 JNI_END 2175 2176 2177 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2178 , EntryProbe, ReturnProbe) \ 2179 \ 2180 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2181 JNIWrapper("Set" XSTR(Result) "Field"); \ 2182 \ 2183 EntryProbe; \ 2184 \ 2185 oop o = JNIHandles::resolve_non_null(obj); \ 2186 Klass* k = o->klass(); \ 2187 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2188 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2189 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2190 /* and creates a ResetNoHandleMark. */ \ 2191 if (JvmtiExport::should_post_field_modification()) { \ 2192 jvalue field_value; \ 2193 field_value.unionType = value; \ 2194 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2195 } \ 2196 o->Fieldname##_field_put(offset, value); \ 2197 ReturnProbe; \ 2198 JNI_END 2199 2200 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2201 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2202 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2203 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2204 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2205 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2206 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2207 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2208 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2209 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2210 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2211 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2212 DEFINE_SETFIELD(jint, int, Int, 'I', i 2213 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2214 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2215 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2216 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2217 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2218 // Float and double probes don't return value because dtrace doesn't currently support it 2219 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2220 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2221 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2222 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2223 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2224 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2225 2226 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2227 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2228 2229 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2230 JNIWrapper("ToReflectedField"); 2231 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2232 jobject ret = NULL; 2233 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2234 2235 fieldDescriptor fd; 2236 bool found = false; 2237 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2238 2239 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2240 2241 if (isStatic) { 2242 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2243 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2244 assert(id->is_static_field_id(), "invalid static field id"); 2245 found = id->find_local_field(&fd); 2246 } else { 2247 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2248 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2249 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2250 } 2251 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2252 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2253 ret = JNIHandles::make_local(env, reflected); 2254 return ret; 2255 JNI_END 2256 2257 2258 // 2259 // Accessing Static Fields 2260 // 2261 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2262 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2263 2264 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2265 const char *name, const char *sig)) 2266 JNIWrapper("GetStaticFieldID"); 2267 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2268 jfieldID ret = NULL; 2269 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2270 2271 // The class should have been loaded (we have an instance of the class 2272 // passed in) so the field and signature should already be in the symbol 2273 // table. If they're not there, the field doesn't exist. 2274 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2275 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2276 if (fieldname == NULL || signame == NULL) { 2277 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2278 } 2279 KlassHandle k(THREAD, 2280 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2281 // Make sure class is initialized before handing id's out to static fields 2282 k()->initialize(CHECK_NULL); 2283 2284 fieldDescriptor fd; 2285 if (!k()->is_instance_klass() || 2286 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2287 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2288 } 2289 2290 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2291 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2292 debug_only(id->set_is_static_field_id();) 2293 2294 debug_only(id->verify(fd.field_holder())); 2295 2296 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2297 return ret; 2298 JNI_END 2299 2300 2301 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2302 JNIWrapper("GetStaticObjectField"); 2303 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2304 #if INCLUDE_JNI_CHECK 2305 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2306 #endif // INCLUDE_JNI_CHECK 2307 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2308 assert(id->is_static_field_id(), "invalid static field id"); 2309 // Keep JVMTI addition small and only check enabled flag here. 2310 // jni_GetField_probe() assumes that is okay to create handles. 2311 if (JvmtiExport::should_post_field_access()) { 2312 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2313 } 2314 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2315 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2316 return ret; 2317 JNI_END 2318 2319 2320 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2321 , EntryProbe, ReturnProbe) \ 2322 \ 2323 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2324 , ReturnProbe); \ 2325 \ 2326 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2327 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2328 EntryProbe; \ 2329 Return ret = 0;\ 2330 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2331 (const Return&)ret);\ 2332 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2333 assert(id->is_static_field_id(), "invalid static field id"); \ 2334 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2335 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2336 if (JvmtiExport::should_post_field_access()) { \ 2337 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2338 } \ 2339 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2340 return ret;\ 2341 JNI_END 2342 2343 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2344 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2345 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2346 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2347 DEFINE_GETSTATICFIELD(jchar, char, Char 2348 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2349 DEFINE_GETSTATICFIELD(jshort, short, Short 2350 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2351 DEFINE_GETSTATICFIELD(jint, int, Int 2352 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2353 DEFINE_GETSTATICFIELD(jlong, long, Long 2354 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2355 // Float and double probes don't return value because dtrace doesn't currently support it 2356 DEFINE_GETSTATICFIELD(jfloat, float, Float 2357 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2358 DEFINE_GETSTATICFIELD(jdouble, double, Double 2359 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2360 2361 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2362 JNIWrapper("SetStaticObjectField"); 2363 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2364 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2365 assert(id->is_static_field_id(), "invalid static field id"); 2366 // Keep JVMTI addition small and only check enabled flag here. 2367 // jni_SetField_probe() assumes that is okay to create handles. 2368 if (JvmtiExport::should_post_field_modification()) { 2369 jvalue field_value; 2370 field_value.l = value; 2371 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2372 } 2373 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2374 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2375 JNI_END 2376 2377 2378 2379 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2380 , EntryProbe, ReturnProbe) \ 2381 \ 2382 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2383 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2384 EntryProbe; \ 2385 \ 2386 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2387 assert(id->is_static_field_id(), "invalid static field id"); \ 2388 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2389 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2390 if (JvmtiExport::should_post_field_modification()) { \ 2391 jvalue field_value; \ 2392 field_value.unionType = value; \ 2393 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2394 } \ 2395 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2396 ReturnProbe;\ 2397 JNI_END 2398 2399 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2400 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2401 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2402 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2403 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2404 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2405 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2406 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2407 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2408 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2409 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2410 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2411 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2412 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2413 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2414 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2415 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2416 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2417 // Float and double probes don't return value because dtrace doesn't currently support it 2418 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2419 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2420 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2421 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2422 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2423 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2424 2425 // 2426 // String Operations 2427 // 2428 2429 // Unicode Interface 2430 2431 DT_RETURN_MARK_DECL(NewString, jstring 2432 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2433 2434 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2435 JNIWrapper("NewString"); 2436 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2437 jstring ret = NULL; 2438 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2439 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2440 ret = (jstring) JNIHandles::make_local(env, string); 2441 return ret; 2442 JNI_END 2443 2444 2445 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2446 JNIWrapper("GetStringLength"); 2447 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2448 jsize ret = 0; 2449 oop s = JNIHandles::resolve_non_null(string); 2450 if (java_lang_String::value(s) != NULL) { 2451 ret = java_lang_String::length(s); 2452 } 2453 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2454 return ret; 2455 JNI_END 2456 2457 2458 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2459 JNIEnv *env, jstring string, jboolean *isCopy)) 2460 JNIWrapper("GetStringChars"); 2461 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2462 jchar* buf = NULL; 2463 oop s = JNIHandles::resolve_non_null(string); 2464 typeArrayOop s_value = java_lang_String::value(s); 2465 if (s_value != NULL) { 2466 int s_len = java_lang_String::length(s); 2467 bool is_latin1 = java_lang_String::is_latin1(s); 2468 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2469 /* JNI Specification states return NULL on OOM */ 2470 if (buf != NULL) { 2471 if (s_len > 0) { 2472 if (!is_latin1) { 2473 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2474 } else { 2475 for (int i = 0; i < s_len; i++) { 2476 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2477 } 2478 } 2479 } 2480 buf[s_len] = 0; 2481 //%note jni_5 2482 if (isCopy != NULL) { 2483 *isCopy = JNI_TRUE; 2484 } 2485 } 2486 } 2487 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2488 return buf; 2489 JNI_END 2490 2491 2492 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2493 JNIWrapper("ReleaseStringChars"); 2494 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2495 //%note jni_6 2496 if (chars != NULL) { 2497 // Since String objects are supposed to be immutable, don't copy any 2498 // new data back. A bad user will have to go after the char array. 2499 FreeHeap((void*) chars); 2500 } 2501 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2502 JNI_END 2503 2504 2505 // UTF Interface 2506 2507 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2508 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2509 2510 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2511 JNIWrapper("NewStringUTF"); 2512 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2513 jstring ret; 2514 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2515 2516 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2517 ret = (jstring) JNIHandles::make_local(env, result); 2518 return ret; 2519 JNI_END 2520 2521 2522 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2523 JNIWrapper("GetStringUTFLength"); 2524 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2525 jsize ret = 0; 2526 oop java_string = JNIHandles::resolve_non_null(string); 2527 if (java_lang_String::value(java_string) != NULL) { 2528 ret = java_lang_String::utf8_length(java_string); 2529 } 2530 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2531 return ret; 2532 JNI_END 2533 2534 2535 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2536 JNIWrapper("GetStringUTFChars"); 2537 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2538 char* result = NULL; 2539 oop java_string = JNIHandles::resolve_non_null(string); 2540 if (java_lang_String::value(java_string) != NULL) { 2541 size_t length = java_lang_String::utf8_length(java_string); 2542 /* JNI Specification states return NULL on OOM */ 2543 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2544 if (result != NULL) { 2545 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2546 if (isCopy != NULL) { 2547 *isCopy = JNI_TRUE; 2548 } 2549 } 2550 } 2551 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2552 return result; 2553 JNI_END 2554 2555 2556 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2557 JNIWrapper("ReleaseStringUTFChars"); 2558 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2559 if (chars != NULL) { 2560 FreeHeap((char*) chars); 2561 } 2562 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2563 JNI_END 2564 2565 2566 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2567 JNIWrapper("GetArrayLength"); 2568 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2569 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2570 assert(a->is_array(), "must be array"); 2571 jsize ret = a->length(); 2572 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2573 return ret; 2574 JNI_END 2575 2576 2577 // 2578 // Object Array Operations 2579 // 2580 2581 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2582 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2583 2584 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2585 JNIWrapper("NewObjectArray"); 2586 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2587 jobjectArray ret = NULL; 2588 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2589 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2590 Klass* ako = ek()->array_klass(CHECK_NULL); 2591 KlassHandle ak = KlassHandle(THREAD, ako); 2592 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2593 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2594 oop initial_value = JNIHandles::resolve(initialElement); 2595 if (initial_value != NULL) { // array already initialized with NULL 2596 for (int index = 0; index < length; index++) { 2597 result->obj_at_put(index, initial_value); 2598 } 2599 } 2600 ret = (jobjectArray) JNIHandles::make_local(env, result); 2601 return ret; 2602 JNI_END 2603 2604 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2605 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2606 2607 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2608 JNIWrapper("GetObjectArrayElement"); 2609 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2610 jobject ret = NULL; 2611 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2612 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2613 if (a->is_within_bounds(index)) { 2614 ret = JNIHandles::make_local(env, a->obj_at(index)); 2615 return ret; 2616 } else { 2617 char buf[jintAsStringSize]; 2618 sprintf(buf, "%d", index); 2619 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2620 } 2621 JNI_END 2622 2623 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2624 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2625 2626 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2627 JNIWrapper("SetObjectArrayElement"); 2628 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2629 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2630 2631 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2632 oop v = JNIHandles::resolve(value); 2633 if (a->is_within_bounds(index)) { 2634 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2635 a->obj_at_put(index, v); 2636 } else { 2637 THROW(vmSymbols::java_lang_ArrayStoreException()); 2638 } 2639 } else { 2640 char buf[jintAsStringSize]; 2641 sprintf(buf, "%d", index); 2642 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2643 } 2644 JNI_END 2645 2646 2647 2648 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2649 ,EntryProbe,ReturnProbe) \ 2650 \ 2651 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2652 , ReturnProbe); \ 2653 \ 2654 JNI_ENTRY(Return, \ 2655 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2656 JNIWrapper("New" XSTR(Result) "Array"); \ 2657 EntryProbe; \ 2658 Return ret = NULL;\ 2659 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2660 \ 2661 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2662 ret = (Return) JNIHandles::make_local(env, obj); \ 2663 return ret;\ 2664 JNI_END 2665 2666 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2667 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2668 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2669 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2670 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2671 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2672 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2673 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2674 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2675 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2676 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2677 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2678 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2679 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2680 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2681 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2682 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2683 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2684 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2685 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2686 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2687 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2688 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2689 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2690 2691 // Return an address which will fault if the caller writes to it. 2692 2693 static char* get_bad_address() { 2694 static char* bad_address = NULL; 2695 if (bad_address == NULL) { 2696 size_t size = os::vm_allocation_granularity(); 2697 bad_address = os::reserve_memory(size); 2698 if (bad_address != NULL) { 2699 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2700 /*is_committed*/false); 2701 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2702 } 2703 } 2704 return bad_address; 2705 } 2706 2707 2708 2709 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2710 , EntryProbe, ReturnProbe) \ 2711 \ 2712 JNI_QUICK_ENTRY(ElementType*, \ 2713 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2714 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2715 EntryProbe; \ 2716 /* allocate an chunk of memory in c land */ \ 2717 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2718 ElementType* result; \ 2719 int len = a->length(); \ 2720 if (len == 0) { \ 2721 /* Empty array: legal but useless, can't return NULL. \ 2722 * Return a pointer to something useless. \ 2723 * Avoid asserts in typeArrayOop. */ \ 2724 result = (ElementType*)get_bad_address(); \ 2725 } else { \ 2726 /* JNI Specification states return NULL on OOM */ \ 2727 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2728 if (result != NULL) { \ 2729 /* copy the array to the c chunk */ \ 2730 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2731 if (isCopy) { \ 2732 *isCopy = JNI_TRUE; \ 2733 } \ 2734 } \ 2735 } \ 2736 ReturnProbe; \ 2737 return result; \ 2738 JNI_END 2739 2740 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2741 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2742 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2743 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2744 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2745 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2746 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2747 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2748 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2749 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2750 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2751 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2752 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2753 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2754 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2755 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2756 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2757 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2758 // Float and double probes don't return value because dtrace doesn't currently support it 2759 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2760 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2761 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2762 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2763 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2764 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2765 2766 2767 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2768 , EntryProbe, ReturnProbe);\ 2769 \ 2770 JNI_QUICK_ENTRY(void, \ 2771 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2772 ElementType *buf, jint mode)) \ 2773 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2774 EntryProbe; \ 2775 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2776 int len = a->length(); \ 2777 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2778 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2779 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2780 } \ 2781 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2782 FreeHeap(buf); \ 2783 } \ 2784 } \ 2785 ReturnProbe; \ 2786 JNI_END 2787 2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2789 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2790 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2792 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2793 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2795 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2796 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2798 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2799 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2801 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2802 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2804 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2805 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2807 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2808 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2810 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2811 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2812 2813 2814 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2815 , EntryProbe, ReturnProbe); \ 2816 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2817 , ReturnProbe); \ 2818 \ 2819 JNI_ENTRY(void, \ 2820 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2821 jsize len, ElementType *buf)) \ 2822 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2823 EntryProbe; \ 2824 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2825 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2826 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2827 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2828 } else { \ 2829 if (len > 0) { \ 2830 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2831 memcpy((u_char*) buf, \ 2832 (u_char*) src->Tag##_at_addr(start), \ 2833 len << sc); \ 2834 } \ 2835 } \ 2836 JNI_END 2837 2838 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2839 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2840 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2841 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2842 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2843 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2844 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2845 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2846 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2847 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2848 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2849 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2850 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2851 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2852 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2853 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2854 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2855 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2856 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2857 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2858 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2859 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2860 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2861 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2862 2863 2864 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2865 , EntryProbe, ReturnProbe); \ 2866 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2867 ,ReturnProbe); \ 2868 \ 2869 JNI_ENTRY(void, \ 2870 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2871 jsize len, const ElementType *buf)) \ 2872 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2873 EntryProbe; \ 2874 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2875 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2876 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2877 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2878 } else { \ 2879 if (len > 0) { \ 2880 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2881 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2882 (u_char*) buf, \ 2883 len << sc); \ 2884 } \ 2885 } \ 2886 JNI_END 2887 2888 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2889 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2890 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2891 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2892 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2893 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2894 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2895 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2896 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2897 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2898 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2899 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2900 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2901 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2902 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2903 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2904 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2905 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2906 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2907 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2908 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2909 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2910 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2911 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2912 2913 2914 // 2915 // Interception of natives 2916 // 2917 2918 // The RegisterNatives call being attempted tried to register with a method that 2919 // is not native. Ask JVM TI what prefixes have been specified. Then check 2920 // to see if the native method is now wrapped with the prefixes. See the 2921 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2922 static Method* find_prefixed_native(KlassHandle k, 2923 Symbol* name, Symbol* signature, TRAPS) { 2924 #if INCLUDE_JVMTI 2925 ResourceMark rm(THREAD); 2926 Method* method; 2927 int name_len = name->utf8_length(); 2928 char* name_str = name->as_utf8(); 2929 int prefix_count; 2930 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2931 for (int i = 0; i < prefix_count; i++) { 2932 char* prefix = prefixes[i]; 2933 int prefix_len = (int)strlen(prefix); 2934 2935 // try adding this prefix to the method name and see if it matches another method name 2936 int trial_len = name_len + prefix_len; 2937 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2938 strcpy(trial_name_str, prefix); 2939 strcat(trial_name_str, name_str); 2940 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2941 if (trial_name == NULL) { 2942 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2943 } 2944 method = k()->lookup_method(trial_name, signature); 2945 if (method == NULL) { 2946 continue; // signature doesn't match, try the next prefix 2947 } 2948 if (method->is_native()) { 2949 method->set_is_prefixed_native(); 2950 return method; // wahoo, we found a prefixed version of the method, return it 2951 } 2952 // found as non-native, so prefix is good, add it, probably just need more prefixes 2953 name_len = trial_len; 2954 name_str = trial_name_str; 2955 } 2956 #endif // INCLUDE_JVMTI 2957 return NULL; // not found 2958 } 2959 2960 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2961 Method* method = k()->lookup_method(name, signature); 2962 if (method == NULL) { 2963 ResourceMark rm; 2964 stringStream st; 2965 st.print("Method %s name or signature does not match", 2966 Method::name_and_sig_as_C_string(k(), name, signature)); 2967 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2968 } 2969 if (!method->is_native()) { 2970 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2971 method = find_prefixed_native(k, name, signature, THREAD); 2972 if (method == NULL) { 2973 ResourceMark rm; 2974 stringStream st; 2975 st.print("Method %s is not declared as native", 2976 Method::name_and_sig_as_C_string(k(), name, signature)); 2977 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2978 } 2979 } 2980 2981 if (entry != NULL) { 2982 method->set_native_function(entry, 2983 Method::native_bind_event_is_interesting); 2984 } else { 2985 method->clear_native_function(); 2986 } 2987 if (PrintJNIResolving) { 2988 ResourceMark rm(THREAD); 2989 tty->print_cr("[Registering JNI native method %s.%s]", 2990 method->method_holder()->external_name(), 2991 method->name()->as_C_string()); 2992 } 2993 return true; 2994 } 2995 2996 DT_RETURN_MARK_DECL(RegisterNatives, jint 2997 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2998 2999 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3000 const JNINativeMethod *methods, 3001 jint nMethods)) 3002 JNIWrapper("RegisterNatives"); 3003 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3004 jint ret = 0; 3005 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3006 3007 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3008 3009 for (int index = 0; index < nMethods; index++) { 3010 const char* meth_name = methods[index].name; 3011 const char* meth_sig = methods[index].signature; 3012 int meth_name_len = (int)strlen(meth_name); 3013 3014 // The class should have been loaded (we have an instance of the class 3015 // passed in) so the method and signature should already be in the symbol 3016 // table. If they're not there, the method doesn't exist. 3017 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3018 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3019 3020 if (name == NULL || signature == NULL) { 3021 ResourceMark rm; 3022 stringStream st; 3023 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3024 // Must return negative value on failure 3025 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3026 } 3027 3028 bool res = register_native(h_k, name, signature, 3029 (address) methods[index].fnPtr, THREAD); 3030 if (!res) { 3031 ret = -1; 3032 break; 3033 } 3034 } 3035 return ret; 3036 JNI_END 3037 3038 3039 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3040 JNIWrapper("UnregisterNatives"); 3041 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3042 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3043 //%note jni_2 3044 if (k->is_instance_klass()) { 3045 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3046 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3047 if (m->is_native()) { 3048 m->clear_native_function(); 3049 m->set_signature_handler(NULL); 3050 } 3051 } 3052 } 3053 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3054 return 0; 3055 JNI_END 3056 3057 // 3058 // Monitor functions 3059 // 3060 3061 DT_RETURN_MARK_DECL(MonitorEnter, jint 3062 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3063 3064 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3065 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3066 jint ret = JNI_ERR; 3067 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3068 3069 // If the object is null, we can't do anything with it 3070 if (jobj == NULL) { 3071 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3072 } 3073 3074 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3075 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3076 ret = JNI_OK; 3077 return ret; 3078 JNI_END 3079 3080 DT_RETURN_MARK_DECL(MonitorExit, jint 3081 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3082 3083 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3084 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3085 jint ret = JNI_ERR; 3086 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3087 3088 // Don't do anything with a null object 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_exit(obj(), CHECK_(JNI_ERR)); 3095 3096 ret = JNI_OK; 3097 return ret; 3098 JNI_END 3099 3100 // 3101 // Extensions 3102 // 3103 3104 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3105 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3106 3107 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3108 JNIWrapper("GetStringRegion"); 3109 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3110 DT_VOID_RETURN_MARK(GetStringRegion); 3111 oop s = JNIHandles::resolve_non_null(string); 3112 int s_len = java_lang_String::length(s); 3113 if (start < 0 || len < 0 || start + len > s_len) { 3114 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3115 } else { 3116 if (len > 0) { 3117 typeArrayOop s_value = java_lang_String::value(s); 3118 bool is_latin1 = java_lang_String::is_latin1(s); 3119 if (!is_latin1) { 3120 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3121 } else { 3122 for (int i = 0; i < len; i++) { 3123 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3124 } 3125 } 3126 } 3127 } 3128 JNI_END 3129 3130 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3131 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3132 3133 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3134 JNIWrapper("GetStringUTFRegion"); 3135 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3136 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3137 oop s = JNIHandles::resolve_non_null(string); 3138 int s_len = java_lang_String::length(s); 3139 if (start < 0 || len < 0 || start + len > s_len) { 3140 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3141 } else { 3142 //%note jni_7 3143 if (len > 0) { 3144 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3145 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3146 // as_utf8_string null-terminates the result string 3147 } else { 3148 // JDK null-terminates the buffer even in len is zero 3149 if (buf != NULL) { 3150 buf[0] = 0; 3151 } 3152 } 3153 } 3154 JNI_END 3155 3156 3157 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3158 JNIWrapper("GetPrimitiveArrayCritical"); 3159 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3160 GC_locker::lock_critical(thread); 3161 if (isCopy != NULL) { 3162 *isCopy = JNI_FALSE; 3163 } 3164 oop a = JNIHandles::resolve_non_null(array); 3165 assert(a->is_array(), "just checking"); 3166 BasicType type; 3167 if (a->is_objArray()) { 3168 type = T_OBJECT; 3169 } else { 3170 type = TypeArrayKlass::cast(a->klass())->element_type(); 3171 } 3172 void* ret = arrayOop(a)->base(type); 3173 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3174 return ret; 3175 JNI_END 3176 3177 3178 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3179 JNIWrapper("ReleasePrimitiveArrayCritical"); 3180 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3181 // The array, carray and mode arguments are ignored 3182 GC_locker::unlock_critical(thread); 3183 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3184 JNI_END 3185 3186 3187 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3188 JNIWrapper("GetStringCritical"); 3189 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3190 GC_locker::lock_critical(thread); 3191 oop s = JNIHandles::resolve_non_null(string); 3192 typeArrayOop s_value = java_lang_String::value(s); 3193 bool is_latin1 = java_lang_String::is_latin1(s); 3194 if (isCopy != NULL) { 3195 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3196 } 3197 jchar* ret; 3198 if (!is_latin1) { 3199 ret = (jchar*) s_value->base(T_CHAR); 3200 } else { 3201 // Inflate latin1 encoded string to UTF16 3202 int s_len = java_lang_String::length(s); 3203 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3204 /* JNI Specification states return NULL on OOM */ 3205 if (ret != NULL) { 3206 for (int i = 0; i < s_len; i++) { 3207 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3208 } 3209 ret[s_len] = 0; 3210 } 3211 } 3212 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3213 return ret; 3214 JNI_END 3215 3216 3217 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3218 JNIWrapper("ReleaseStringCritical"); 3219 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3220 // The str and chars arguments are ignored for UTF16 strings 3221 oop s = JNIHandles::resolve_non_null(str); 3222 bool is_latin1 = java_lang_String::is_latin1(s); 3223 if (is_latin1) { 3224 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3225 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3226 FREE_C_HEAP_ARRAY(jchar, chars); 3227 } 3228 GC_locker::unlock_critical(thread); 3229 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3230 JNI_END 3231 3232 3233 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3234 JNIWrapper("jni_NewWeakGlobalRef"); 3235 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3236 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3237 jweak ret = JNIHandles::make_weak_global(ref_handle); 3238 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3239 return ret; 3240 JNI_END 3241 3242 // Must be JNI_ENTRY (with HandleMark) 3243 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3244 JNIWrapper("jni_DeleteWeakGlobalRef"); 3245 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3246 JNIHandles::destroy_weak_global(ref); 3247 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3248 JNI_END 3249 3250 3251 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3252 JNIWrapper("jni_ExceptionCheck"); 3253 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3254 jni_check_async_exceptions(thread); 3255 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3256 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3257 return ret; 3258 JNI_END 3259 3260 3261 // Initialization state for three routines below relating to 3262 // java.nio.DirectBuffers 3263 static jint directBufferSupportInitializeStarted = 0; 3264 static volatile jint directBufferSupportInitializeEnded = 0; 3265 static volatile jint directBufferSupportInitializeFailed = 0; 3266 static jclass bufferClass = NULL; 3267 static jclass directBufferClass = NULL; 3268 static jclass directByteBufferClass = NULL; 3269 static jmethodID directByteBufferConstructor = NULL; 3270 static jfieldID directBufferAddressField = NULL; 3271 static jfieldID bufferCapacityField = NULL; 3272 3273 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3274 Handle loader; // null (bootstrap) loader 3275 Handle protection_domain; // null protection domain 3276 3277 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3278 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3279 3280 if (log_is_enabled(Info, classresolve) && result != NULL) { 3281 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3282 } 3283 return result; 3284 } 3285 3286 // These lookups are done with the NULL (bootstrap) ClassLoader to 3287 // circumvent any security checks that would be done by jni_FindClass. 3288 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3289 { 3290 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3291 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3292 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3293 return true; 3294 } 3295 JNI_END 3296 3297 3298 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3299 if (directBufferSupportInitializeFailed) { 3300 return false; 3301 } 3302 3303 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3304 if (!lookupDirectBufferClasses(env)) { 3305 directBufferSupportInitializeFailed = 1; 3306 return false; 3307 } 3308 3309 // Make global references for these 3310 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3311 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3312 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3313 3314 // Get needed field and method IDs 3315 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3316 if (env->ExceptionCheck()) { 3317 env->ExceptionClear(); 3318 directBufferSupportInitializeFailed = 1; 3319 return false; 3320 } 3321 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3322 if (env->ExceptionCheck()) { 3323 env->ExceptionClear(); 3324 directBufferSupportInitializeFailed = 1; 3325 return false; 3326 } 3327 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3328 if (env->ExceptionCheck()) { 3329 env->ExceptionClear(); 3330 directBufferSupportInitializeFailed = 1; 3331 return false; 3332 } 3333 3334 if ((directByteBufferConstructor == NULL) || 3335 (directBufferAddressField == NULL) || 3336 (bufferCapacityField == NULL)) { 3337 directBufferSupportInitializeFailed = 1; 3338 return false; 3339 } 3340 3341 directBufferSupportInitializeEnded = 1; 3342 } else { 3343 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3344 os::naked_yield(); 3345 } 3346 } 3347 3348 return !directBufferSupportInitializeFailed; 3349 } 3350 3351 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3352 { 3353 // thread_from_jni_environment() will block if VM is gone. 3354 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3355 3356 JNIWrapper("jni_NewDirectByteBuffer"); 3357 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3358 3359 if (!directBufferSupportInitializeEnded) { 3360 if (!initializeDirectBufferSupport(env, thread)) { 3361 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3362 return NULL; 3363 } 3364 } 3365 3366 // Being paranoid about accidental sign extension on address 3367 jlong addr = (jlong) ((uintptr_t) address); 3368 // NOTE that package-private DirectByteBuffer constructor currently 3369 // takes int capacity 3370 jint cap = (jint) capacity; 3371 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3372 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3373 return ret; 3374 } 3375 3376 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3377 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3378 3379 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3380 { 3381 // thread_from_jni_environment() will block if VM is gone. 3382 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3383 3384 JNIWrapper("jni_GetDirectBufferAddress"); 3385 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3386 void* ret = NULL; 3387 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3388 3389 if (!directBufferSupportInitializeEnded) { 3390 if (!initializeDirectBufferSupport(env, thread)) { 3391 return 0; 3392 } 3393 } 3394 3395 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3396 return 0; 3397 } 3398 3399 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3400 return ret; 3401 } 3402 3403 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3404 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3405 3406 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3407 { 3408 // thread_from_jni_environment() will block if VM is gone. 3409 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3410 3411 JNIWrapper("jni_GetDirectBufferCapacity"); 3412 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3413 jlong ret = -1; 3414 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3415 3416 if (!directBufferSupportInitializeEnded) { 3417 if (!initializeDirectBufferSupport(env, thread)) { 3418 ret = 0; 3419 return ret; 3420 } 3421 } 3422 3423 if (buf == NULL) { 3424 return -1; 3425 } 3426 3427 if (!env->IsInstanceOf(buf, directBufferClass)) { 3428 return -1; 3429 } 3430 3431 // NOTE that capacity is currently an int in the implementation 3432 ret = env->GetIntField(buf, bufferCapacityField); 3433 return ret; 3434 } 3435 3436 3437 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3438 JNIWrapper("GetVersion"); 3439 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3440 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3441 return CurrentVersion; 3442 JNI_END 3443 3444 extern struct JavaVM_ main_vm; 3445 3446 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3447 JNIWrapper("jni_GetJavaVM"); 3448 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3449 *vm = (JavaVM *)(&main_vm); 3450 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3451 return JNI_OK; 3452 JNI_END 3453 3454 // Structure containing all jni functions 3455 struct JNINativeInterface_ jni_NativeInterface = { 3456 NULL, 3457 NULL, 3458 NULL, 3459 3460 NULL, 3461 3462 jni_GetVersion, 3463 3464 jni_DefineClass, 3465 jni_FindClass, 3466 3467 jni_FromReflectedMethod, 3468 jni_FromReflectedField, 3469 3470 jni_ToReflectedMethod, 3471 3472 jni_GetSuperclass, 3473 jni_IsAssignableFrom, 3474 3475 jni_ToReflectedField, 3476 3477 jni_Throw, 3478 jni_ThrowNew, 3479 jni_ExceptionOccurred, 3480 jni_ExceptionDescribe, 3481 jni_ExceptionClear, 3482 jni_FatalError, 3483 3484 jni_PushLocalFrame, 3485 jni_PopLocalFrame, 3486 3487 jni_NewGlobalRef, 3488 jni_DeleteGlobalRef, 3489 jni_DeleteLocalRef, 3490 jni_IsSameObject, 3491 3492 jni_NewLocalRef, 3493 jni_EnsureLocalCapacity, 3494 3495 jni_AllocObject, 3496 jni_NewObject, 3497 jni_NewObjectV, 3498 jni_NewObjectA, 3499 3500 jni_GetObjectClass, 3501 jni_IsInstanceOf, 3502 3503 jni_GetMethodID, 3504 3505 jni_CallObjectMethod, 3506 jni_CallObjectMethodV, 3507 jni_CallObjectMethodA, 3508 jni_CallBooleanMethod, 3509 jni_CallBooleanMethodV, 3510 jni_CallBooleanMethodA, 3511 jni_CallByteMethod, 3512 jni_CallByteMethodV, 3513 jni_CallByteMethodA, 3514 jni_CallCharMethod, 3515 jni_CallCharMethodV, 3516 jni_CallCharMethodA, 3517 jni_CallShortMethod, 3518 jni_CallShortMethodV, 3519 jni_CallShortMethodA, 3520 jni_CallIntMethod, 3521 jni_CallIntMethodV, 3522 jni_CallIntMethodA, 3523 jni_CallLongMethod, 3524 jni_CallLongMethodV, 3525 jni_CallLongMethodA, 3526 jni_CallFloatMethod, 3527 jni_CallFloatMethodV, 3528 jni_CallFloatMethodA, 3529 jni_CallDoubleMethod, 3530 jni_CallDoubleMethodV, 3531 jni_CallDoubleMethodA, 3532 jni_CallVoidMethod, 3533 jni_CallVoidMethodV, 3534 jni_CallVoidMethodA, 3535 3536 jni_CallNonvirtualObjectMethod, 3537 jni_CallNonvirtualObjectMethodV, 3538 jni_CallNonvirtualObjectMethodA, 3539 jni_CallNonvirtualBooleanMethod, 3540 jni_CallNonvirtualBooleanMethodV, 3541 jni_CallNonvirtualBooleanMethodA, 3542 jni_CallNonvirtualByteMethod, 3543 jni_CallNonvirtualByteMethodV, 3544 jni_CallNonvirtualByteMethodA, 3545 jni_CallNonvirtualCharMethod, 3546 jni_CallNonvirtualCharMethodV, 3547 jni_CallNonvirtualCharMethodA, 3548 jni_CallNonvirtualShortMethod, 3549 jni_CallNonvirtualShortMethodV, 3550 jni_CallNonvirtualShortMethodA, 3551 jni_CallNonvirtualIntMethod, 3552 jni_CallNonvirtualIntMethodV, 3553 jni_CallNonvirtualIntMethodA, 3554 jni_CallNonvirtualLongMethod, 3555 jni_CallNonvirtualLongMethodV, 3556 jni_CallNonvirtualLongMethodA, 3557 jni_CallNonvirtualFloatMethod, 3558 jni_CallNonvirtualFloatMethodV, 3559 jni_CallNonvirtualFloatMethodA, 3560 jni_CallNonvirtualDoubleMethod, 3561 jni_CallNonvirtualDoubleMethodV, 3562 jni_CallNonvirtualDoubleMethodA, 3563 jni_CallNonvirtualVoidMethod, 3564 jni_CallNonvirtualVoidMethodV, 3565 jni_CallNonvirtualVoidMethodA, 3566 3567 jni_GetFieldID, 3568 3569 jni_GetObjectField, 3570 jni_GetBooleanField, 3571 jni_GetByteField, 3572 jni_GetCharField, 3573 jni_GetShortField, 3574 jni_GetIntField, 3575 jni_GetLongField, 3576 jni_GetFloatField, 3577 jni_GetDoubleField, 3578 3579 jni_SetObjectField, 3580 jni_SetBooleanField, 3581 jni_SetByteField, 3582 jni_SetCharField, 3583 jni_SetShortField, 3584 jni_SetIntField, 3585 jni_SetLongField, 3586 jni_SetFloatField, 3587 jni_SetDoubleField, 3588 3589 jni_GetStaticMethodID, 3590 3591 jni_CallStaticObjectMethod, 3592 jni_CallStaticObjectMethodV, 3593 jni_CallStaticObjectMethodA, 3594 jni_CallStaticBooleanMethod, 3595 jni_CallStaticBooleanMethodV, 3596 jni_CallStaticBooleanMethodA, 3597 jni_CallStaticByteMethod, 3598 jni_CallStaticByteMethodV, 3599 jni_CallStaticByteMethodA, 3600 jni_CallStaticCharMethod, 3601 jni_CallStaticCharMethodV, 3602 jni_CallStaticCharMethodA, 3603 jni_CallStaticShortMethod, 3604 jni_CallStaticShortMethodV, 3605 jni_CallStaticShortMethodA, 3606 jni_CallStaticIntMethod, 3607 jni_CallStaticIntMethodV, 3608 jni_CallStaticIntMethodA, 3609 jni_CallStaticLongMethod, 3610 jni_CallStaticLongMethodV, 3611 jni_CallStaticLongMethodA, 3612 jni_CallStaticFloatMethod, 3613 jni_CallStaticFloatMethodV, 3614 jni_CallStaticFloatMethodA, 3615 jni_CallStaticDoubleMethod, 3616 jni_CallStaticDoubleMethodV, 3617 jni_CallStaticDoubleMethodA, 3618 jni_CallStaticVoidMethod, 3619 jni_CallStaticVoidMethodV, 3620 jni_CallStaticVoidMethodA, 3621 3622 jni_GetStaticFieldID, 3623 3624 jni_GetStaticObjectField, 3625 jni_GetStaticBooleanField, 3626 jni_GetStaticByteField, 3627 jni_GetStaticCharField, 3628 jni_GetStaticShortField, 3629 jni_GetStaticIntField, 3630 jni_GetStaticLongField, 3631 jni_GetStaticFloatField, 3632 jni_GetStaticDoubleField, 3633 3634 jni_SetStaticObjectField, 3635 jni_SetStaticBooleanField, 3636 jni_SetStaticByteField, 3637 jni_SetStaticCharField, 3638 jni_SetStaticShortField, 3639 jni_SetStaticIntField, 3640 jni_SetStaticLongField, 3641 jni_SetStaticFloatField, 3642 jni_SetStaticDoubleField, 3643 3644 jni_NewString, 3645 jni_GetStringLength, 3646 jni_GetStringChars, 3647 jni_ReleaseStringChars, 3648 3649 jni_NewStringUTF, 3650 jni_GetStringUTFLength, 3651 jni_GetStringUTFChars, 3652 jni_ReleaseStringUTFChars, 3653 3654 jni_GetArrayLength, 3655 3656 jni_NewObjectArray, 3657 jni_GetObjectArrayElement, 3658 jni_SetObjectArrayElement, 3659 3660 jni_NewBooleanArray, 3661 jni_NewByteArray, 3662 jni_NewCharArray, 3663 jni_NewShortArray, 3664 jni_NewIntArray, 3665 jni_NewLongArray, 3666 jni_NewFloatArray, 3667 jni_NewDoubleArray, 3668 3669 jni_GetBooleanArrayElements, 3670 jni_GetByteArrayElements, 3671 jni_GetCharArrayElements, 3672 jni_GetShortArrayElements, 3673 jni_GetIntArrayElements, 3674 jni_GetLongArrayElements, 3675 jni_GetFloatArrayElements, 3676 jni_GetDoubleArrayElements, 3677 3678 jni_ReleaseBooleanArrayElements, 3679 jni_ReleaseByteArrayElements, 3680 jni_ReleaseCharArrayElements, 3681 jni_ReleaseShortArrayElements, 3682 jni_ReleaseIntArrayElements, 3683 jni_ReleaseLongArrayElements, 3684 jni_ReleaseFloatArrayElements, 3685 jni_ReleaseDoubleArrayElements, 3686 3687 jni_GetBooleanArrayRegion, 3688 jni_GetByteArrayRegion, 3689 jni_GetCharArrayRegion, 3690 jni_GetShortArrayRegion, 3691 jni_GetIntArrayRegion, 3692 jni_GetLongArrayRegion, 3693 jni_GetFloatArrayRegion, 3694 jni_GetDoubleArrayRegion, 3695 3696 jni_SetBooleanArrayRegion, 3697 jni_SetByteArrayRegion, 3698 jni_SetCharArrayRegion, 3699 jni_SetShortArrayRegion, 3700 jni_SetIntArrayRegion, 3701 jni_SetLongArrayRegion, 3702 jni_SetFloatArrayRegion, 3703 jni_SetDoubleArrayRegion, 3704 3705 jni_RegisterNatives, 3706 jni_UnregisterNatives, 3707 3708 jni_MonitorEnter, 3709 jni_MonitorExit, 3710 3711 jni_GetJavaVM, 3712 3713 jni_GetStringRegion, 3714 jni_GetStringUTFRegion, 3715 3716 jni_GetPrimitiveArrayCritical, 3717 jni_ReleasePrimitiveArrayCritical, 3718 3719 jni_GetStringCritical, 3720 jni_ReleaseStringCritical, 3721 3722 jni_NewWeakGlobalRef, 3723 jni_DeleteWeakGlobalRef, 3724 3725 jni_ExceptionCheck, 3726 3727 jni_NewDirectByteBuffer, 3728 jni_GetDirectBufferAddress, 3729 jni_GetDirectBufferCapacity, 3730 3731 // New 1_6 features 3732 3733 jni_GetObjectRefType 3734 }; 3735 3736 3737 // For jvmti use to modify jni function table. 3738 // Java threads in native contiues to run until it is transitioned 3739 // to VM at safepoint. Before the transition or before it is blocked 3740 // for safepoint it may access jni function table. VM could crash if 3741 // any java thread access the jni function table in the middle of memcpy. 3742 // To avoid this each function pointers are copied automically. 3743 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3744 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3745 intptr_t *a = (intptr_t *) jni_functions(); 3746 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3747 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3748 Atomic::store_ptr(*b++, a++); 3749 } 3750 } 3751 3752 void quicken_jni_functions() { 3753 // Replace Get<Primitive>Field with fast versions 3754 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3755 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3756 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3757 // windows x86 currently needs SEH wrapper and the gain of the fast 3758 // versions currently isn't certain for server vm on uniprocessor. 3759 && os::is_MP() 3760 #endif 3761 ) { 3762 address func; 3763 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3764 if (func != (address)-1) { 3765 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3766 } 3767 func = JNI_FastGetField::generate_fast_get_byte_field(); 3768 if (func != (address)-1) { 3769 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3770 } 3771 func = JNI_FastGetField::generate_fast_get_char_field(); 3772 if (func != (address)-1) { 3773 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3774 } 3775 func = JNI_FastGetField::generate_fast_get_short_field(); 3776 if (func != (address)-1) { 3777 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3778 } 3779 func = JNI_FastGetField::generate_fast_get_int_field(); 3780 if (func != (address)-1) { 3781 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3782 } 3783 func = JNI_FastGetField::generate_fast_get_long_field(); 3784 if (func != (address)-1) { 3785 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3786 } 3787 func = JNI_FastGetField::generate_fast_get_float_field(); 3788 if (func != (address)-1) { 3789 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3790 } 3791 func = JNI_FastGetField::generate_fast_get_double_field(); 3792 if (func != (address)-1) { 3793 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3794 } 3795 } 3796 } 3797 3798 // Returns the function structure 3799 struct JNINativeInterface_* jni_functions() { 3800 #if INCLUDE_JNI_CHECK 3801 if (CheckJNICalls) return jni_functions_check(); 3802 #endif // INCLUDE_JNI_CHECK 3803 return &jni_NativeInterface; 3804 } 3805 3806 // Returns the function structure 3807 struct JNINativeInterface_* jni_functions_nocheck() { 3808 return &jni_NativeInterface; 3809 } 3810 3811 3812 // Invocation API 3813 3814 3815 // Forward declaration 3816 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3817 3818 // Global invocation API vars 3819 volatile jint vm_created = 0; 3820 // Indicate whether it is safe to recreate VM 3821 volatile jint safe_to_recreate_vm = 1; 3822 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3823 3824 3825 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3826 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3827 3828 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3829 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3830 3831 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3832 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3833 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3834 jint ret = JNI_ERR; 3835 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3836 3837 if (Threads::is_supported_jni_version(args->version)) { 3838 ret = JNI_OK; 3839 } 3840 // 1.1 style no longer supported in hotspot. 3841 // According the JNI spec, we should update args->version on return. 3842 // We also use the structure to communicate with launcher about default 3843 // stack size. 3844 if (args->version == JNI_VERSION_1_1) { 3845 args->version = JNI_VERSION_1_2; 3846 // javaStackSize is int in arguments structure 3847 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3848 args->javaStackSize = (jint)(ThreadStackSize * K); 3849 } 3850 return ret; 3851 } 3852 3853 #ifndef PRODUCT 3854 3855 #include "gc/shared/collectedHeap.hpp" 3856 #include "gc/shared/gcTimer.hpp" 3857 #if INCLUDE_ALL_GCS 3858 #include "gc/g1/heapRegionRemSet.hpp" 3859 #endif 3860 #include "compiler/directivesParser.hpp" 3861 #include "memory/guardedMemory.hpp" 3862 #include "utilities/json.hpp" 3863 #include "utilities/ostream.hpp" 3864 #include "utilities/quickSort.hpp" 3865 #if INCLUDE_VM_STRUCTS 3866 #include "runtime/vmStructs.hpp" 3867 #endif 3868 3869 #define run_unit_test(unit_test_function_call) \ 3870 tty->print_cr("Running test: " #unit_test_function_call); \ 3871 unit_test_function_call 3872 3873 // Forward declaration 3874 void TestDependencyContext_test(); 3875 void test_semaphore(); 3876 void TestOS_test(); 3877 void TestReservedSpace_test(); 3878 void TestReserveMemorySpecial_test(); 3879 void TestVirtualSpace_test(); 3880 void TestMetaspaceAux_test(); 3881 void TestMetachunk_test(); 3882 void TestVirtualSpaceNode_test(); 3883 void TestNewSize_test(); 3884 void TestOldSize_test(); 3885 void TestKlass_test(); 3886 void TestBitMap_test(); 3887 void TestAsUtf8(); 3888 void Test_linked_list(); 3889 void TestResourcehash_test(); 3890 void TestChunkedList_test(); 3891 void Test_log_length(); 3892 #if INCLUDE_ALL_GCS 3893 void TestOldFreeSpaceCalculation_test(); 3894 void TestG1BiasedArray_test(); 3895 void TestBufferingOopClosure_test(); 3896 void TestCodeCacheRemSet_test(); 3897 void FreeRegionList_test(); 3898 void IHOP_test(); 3899 void test_memset_with_concurrent_readers() NOT_DEBUG_RETURN; 3900 void TestPredictions_test(); 3901 void WorkerDataArray_test(); 3902 #endif 3903 3904 void execute_internal_vm_tests() { 3905 if (ExecuteInternalVMTests) { 3906 tty->print_cr("Running internal VM tests"); 3907 run_unit_test(TestDependencyContext_test()); 3908 run_unit_test(test_semaphore()); 3909 run_unit_test(TestOS_test()); 3910 run_unit_test(TestReservedSpace_test()); 3911 run_unit_test(TestReserveMemorySpecial_test()); 3912 run_unit_test(TestVirtualSpace_test()); 3913 run_unit_test(TestMetaspaceAux_test()); 3914 run_unit_test(TestMetachunk_test()); 3915 run_unit_test(TestVirtualSpaceNode_test()); 3916 run_unit_test(GlobalDefinitions::test_globals()); 3917 run_unit_test(GCTimerAllTest::all()); 3918 run_unit_test(arrayOopDesc::test_max_array_length()); 3919 run_unit_test(CollectedHeap::test_is_in()); 3920 run_unit_test(QuickSort::test_quick_sort()); 3921 run_unit_test(GuardedMemory::test_guarded_memory()); 3922 run_unit_test(AltHashing::test_alt_hash()); 3923 run_unit_test(TestNewSize_test()); 3924 run_unit_test(TestOldSize_test()); 3925 run_unit_test(TestKlass_test()); 3926 run_unit_test(TestBitMap_test()); 3927 run_unit_test(TestAsUtf8()); 3928 run_unit_test(TestResourcehash_test()); 3929 run_unit_test(ObjectMonitor::sanity_checks()); 3930 run_unit_test(Test_linked_list()); 3931 run_unit_test(TestChunkedList_test()); 3932 run_unit_test(JSONTest::test()); 3933 run_unit_test(Test_log_length()); 3934 run_unit_test(DirectivesParser::test()); 3935 #if INCLUDE_VM_STRUCTS 3936 run_unit_test(VMStructs::test()); 3937 #endif 3938 #if INCLUDE_ALL_GCS 3939 run_unit_test(TestOldFreeSpaceCalculation_test()); 3940 run_unit_test(TestG1BiasedArray_test()); 3941 run_unit_test(TestBufferingOopClosure_test()); 3942 run_unit_test(TestCodeCacheRemSet_test()); 3943 if (UseG1GC) { 3944 run_unit_test(FreeRegionList_test()); 3945 run_unit_test(IHOP_test()); 3946 } 3947 run_unit_test(test_memset_with_concurrent_readers()); 3948 run_unit_test(TestPredictions_test()); 3949 run_unit_test(WorkerDataArray_test()); 3950 #endif 3951 tty->print_cr("All internal VM tests passed"); 3952 } 3953 } 3954 3955 #undef run_unit_test 3956 3957 #endif 3958 3959 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3960 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3961 3962 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3963 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3964 3965 jint result = JNI_ERR; 3966 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3967 3968 // We're about to use Atomic::xchg for synchronization. Some Zero 3969 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3970 // but __sync_lock_test_and_set is not guaranteed to do what we want 3971 // on all architectures. So we check it works before relying on it. 3972 #if defined(ZERO) && defined(ASSERT) 3973 { 3974 jint a = 0xcafebabe; 3975 jint b = Atomic::xchg(0xdeadbeef, &a); 3976 void *c = &a; 3977 void *d = Atomic::xchg_ptr(&b, &c); 3978 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3979 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3980 } 3981 #endif // ZERO && ASSERT 3982 3983 // At the moment it's only possible to have one Java VM, 3984 // since some of the runtime state is in global variables. 3985 3986 // We cannot use our mutex locks here, since they only work on 3987 // Threads. We do an atomic compare and exchange to ensure only 3988 // one thread can call this method at a time 3989 3990 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3991 // the add/dec implementations are dependent on whether we are running 3992 // on a multiprocessor, and at this stage of initialization the os::is_MP 3993 // function used to determine this will always return false. Atomic::xchg 3994 // does not have this problem. 3995 if (Atomic::xchg(1, &vm_created) == 1) { 3996 return JNI_EEXIST; // already created, or create attempt in progress 3997 } 3998 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3999 return JNI_ERR; // someone tried and failed and retry not allowed. 4000 } 4001 4002 assert(vm_created == 1, "vm_created is true during the creation"); 4003 4004 /** 4005 * Certain errors during initialization are recoverable and do not 4006 * prevent this method from being called again at a later time 4007 * (perhaps with different arguments). However, at a certain 4008 * point during initialization if an error occurs we cannot allow 4009 * this function to be called again (or it will crash). In those 4010 * situations, the 'canTryAgain' flag is set to false, which atomically 4011 * sets safe_to_recreate_vm to 1, such that any new call to 4012 * JNI_CreateJavaVM will immediately fail using the above logic. 4013 */ 4014 bool can_try_again = true; 4015 4016 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 4017 if (result == JNI_OK) { 4018 JavaThread *thread = JavaThread::current(); 4019 assert(!thread->has_pending_exception(), "should have returned not OK"); 4020 /* thread is thread_in_vm here */ 4021 *vm = (JavaVM *)(&main_vm); 4022 *(JNIEnv**)penv = thread->jni_environment(); 4023 4024 #if INCLUDE_JVMCI 4025 if (EnableJVMCI) { 4026 if (UseJVMCICompiler) { 4027 // JVMCI is initialized on a CompilerThread 4028 if (BootstrapJVMCI) { 4029 JavaThread* THREAD = thread; 4030 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 4031 compiler->bootstrap(); 4032 } 4033 } 4034 } 4035 #endif 4036 4037 // Tracks the time application was running before GC 4038 RuntimeService::record_application_start(); 4039 4040 // Notify JVMTI 4041 if (JvmtiExport::should_post_thread_life()) { 4042 JvmtiExport::post_thread_start(thread); 4043 } 4044 4045 EventThreadStart event; 4046 if (event.should_commit()) { 4047 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4048 event.commit(); 4049 } 4050 4051 #ifndef PRODUCT 4052 // Check if we should compile all classes on bootclasspath 4053 if (CompileTheWorld) ClassLoader::compile_the_world(); 4054 if (ReplayCompiles) ciReplay::replay(thread); 4055 4056 // Some platforms (like Win*) need a wrapper around these test 4057 // functions in order to properly handle error conditions. 4058 test_error_handler(); 4059 execute_internal_vm_tests(); 4060 #endif 4061 4062 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4063 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4064 } else { 4065 // If create_vm exits because of a pending exception, exit with that 4066 // exception. In the future when we figure out how to reclaim memory, 4067 // we may be able to exit with JNI_ERR and allow the calling application 4068 // to continue. 4069 if (Universe::is_fully_initialized()) { 4070 // otherwise no pending exception possible - VM will already have aborted 4071 JavaThread* THREAD = JavaThread::current(); 4072 if (HAS_PENDING_EXCEPTION) { 4073 HandleMark hm; 4074 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4075 } 4076 } 4077 4078 if (can_try_again) { 4079 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4080 safe_to_recreate_vm = 1; 4081 } 4082 4083 // Creation failed. We must reset vm_created 4084 *vm = 0; 4085 *(JNIEnv**)penv = 0; 4086 // reset vm_created last to avoid race condition. Use OrderAccess to 4087 // control both compiler and architectural-based reordering. 4088 OrderAccess::release_store(&vm_created, 0); 4089 } 4090 4091 // Flush stdout and stderr before exit. 4092 fflush(stdout); 4093 fflush(stderr); 4094 4095 return result; 4096 4097 } 4098 4099 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4100 jint result = 0; 4101 // On Windows, let CreateJavaVM run with SEH protection 4102 #ifdef _WIN32 4103 __try { 4104 #endif 4105 result = JNI_CreateJavaVM_inner(vm, penv, args); 4106 #ifdef _WIN32 4107 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4108 // Nothing to do. 4109 } 4110 #endif 4111 return result; 4112 } 4113 4114 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4115 // See bug 4367188, the wrapper can sometimes cause VM crashes 4116 // JNIWrapper("GetCreatedJavaVMs"); 4117 4118 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4119 4120 if (vm_created) { 4121 if (numVMs != NULL) *numVMs = 1; 4122 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4123 } else { 4124 if (numVMs != NULL) *numVMs = 0; 4125 } 4126 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4127 return JNI_OK; 4128 } 4129 4130 extern "C" { 4131 4132 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4133 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4134 4135 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4136 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4137 jint res = JNI_ERR; 4138 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4139 4140 if (!vm_created) { 4141 res = JNI_ERR; 4142 return res; 4143 } 4144 4145 JNIWrapper("DestroyJavaVM"); 4146 JNIEnv *env; 4147 JavaVMAttachArgs destroyargs; 4148 destroyargs.version = CurrentVersion; 4149 destroyargs.name = (char *)"DestroyJavaVM"; 4150 destroyargs.group = NULL; 4151 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4152 if (res != JNI_OK) { 4153 return res; 4154 } 4155 4156 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4157 JavaThread* thread = JavaThread::current(); 4158 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4159 if (Threads::destroy_vm()) { 4160 // Should not change thread state, VM is gone 4161 vm_created = false; 4162 res = JNI_OK; 4163 return res; 4164 } else { 4165 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4166 res = JNI_ERR; 4167 return res; 4168 } 4169 } 4170 4171 4172 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4173 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4174 4175 // Check below commented out from JDK1.2fcs as well 4176 /* 4177 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4178 return JNI_EVERSION; 4179 } 4180 */ 4181 4182 Thread* t = Thread::current_or_null(); 4183 if (t != NULL) { 4184 // If the thread has been attached this operation is a no-op 4185 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4186 return JNI_OK; 4187 } 4188 4189 // Create a thread and mark it as attaching so it will be skipped by the 4190 // ThreadsListEnumerator - see CR 6404306 4191 JavaThread* thread = new JavaThread(true); 4192 4193 // Set correct safepoint info. The thread is going to call into Java when 4194 // initializing the Java level thread object. Hence, the correct state must 4195 // be set in order for the Safepoint code to deal with it correctly. 4196 thread->set_thread_state(_thread_in_vm); 4197 thread->record_stack_base_and_size(); 4198 thread->initialize_thread_current(); 4199 4200 if (!os::create_attached_thread(thread)) { 4201 delete thread; 4202 return JNI_ERR; 4203 } 4204 // Enable stack overflow checks 4205 thread->create_stack_guard_pages(); 4206 4207 thread->initialize_tlab(); 4208 4209 thread->cache_global_variables(); 4210 4211 // Crucial that we do not have a safepoint check for this thread, since it has 4212 // not been added to the Thread list yet. 4213 { Threads_lock->lock_without_safepoint_check(); 4214 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4215 // avoid this thread trying to do a GC before it is added to the thread-list 4216 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4217 Threads::add(thread, daemon); 4218 Threads_lock->unlock(); 4219 } 4220 // Create thread group and name info from attach arguments 4221 oop group = NULL; 4222 char* thread_name = NULL; 4223 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4224 group = JNIHandles::resolve(args->group); 4225 thread_name = args->name; // may be NULL 4226 } 4227 if (group == NULL) group = Universe::main_thread_group(); 4228 4229 // Create Java level thread object and attach it to this thread 4230 bool attach_failed = false; 4231 { 4232 EXCEPTION_MARK; 4233 HandleMark hm(THREAD); 4234 Handle thread_group(THREAD, group); 4235 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4236 if (HAS_PENDING_EXCEPTION) { 4237 CLEAR_PENDING_EXCEPTION; 4238 // cleanup outside the handle mark. 4239 attach_failed = true; 4240 } 4241 } 4242 4243 if (attach_failed) { 4244 // Added missing cleanup 4245 thread->cleanup_failed_attach_current_thread(); 4246 return JNI_ERR; 4247 } 4248 4249 // mark the thread as no longer attaching 4250 // this uses a fence to push the change through so we don't have 4251 // to regrab the threads_lock 4252 thread->set_done_attaching_via_jni(); 4253 4254 // Set java thread status. 4255 java_lang_Thread::set_thread_status(thread->threadObj(), 4256 java_lang_Thread::RUNNABLE); 4257 4258 // Notify the debugger 4259 if (JvmtiExport::should_post_thread_life()) { 4260 JvmtiExport::post_thread_start(thread); 4261 } 4262 4263 EventThreadStart event; 4264 if (event.should_commit()) { 4265 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4266 event.commit(); 4267 } 4268 4269 *(JNIEnv**)penv = thread->jni_environment(); 4270 4271 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4272 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4273 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4274 // needed. 4275 4276 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4277 4278 // Perform any platform dependent FPU setup 4279 os::setup_fpu(); 4280 4281 return JNI_OK; 4282 } 4283 4284 4285 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4286 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4287 if (!vm_created) { 4288 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4289 return JNI_ERR; 4290 } 4291 4292 JNIWrapper("AttachCurrentThread"); 4293 jint ret = attach_current_thread(vm, penv, _args, false); 4294 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4295 return ret; 4296 } 4297 4298 4299 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4300 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4301 VM_Exit::block_if_vm_exited(); 4302 4303 JNIWrapper("DetachCurrentThread"); 4304 4305 // If the thread has already been detached the operation is a no-op 4306 if (Thread::current_or_null() == NULL) { 4307 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4308 return JNI_OK; 4309 } 4310 4311 JavaThread* thread = JavaThread::current(); 4312 if (thread->has_last_Java_frame()) { 4313 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4314 // Can't detach a thread that's running java, that can't work. 4315 return JNI_ERR; 4316 } 4317 4318 // Safepoint support. Have to do call-back to safepoint code, if in the 4319 // middel of a safepoint operation 4320 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4321 4322 // XXX: Note that JavaThread::exit() call below removes the guards on the 4323 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4324 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4325 // of the guards is visible in jni_AttachCurrentThread above, 4326 // the removal of the guards is buried below in JavaThread::exit() 4327 // here. The abstraction should be more symmetrically either exposed 4328 // or hidden (e.g. it could probably be hidden in the same 4329 // (platform-dependent) methods where we do alternate stack 4330 // maintenance work?) 4331 thread->exit(false, JavaThread::jni_detach); 4332 delete thread; 4333 4334 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4335 return JNI_OK; 4336 } 4337 4338 DT_RETURN_MARK_DECL(GetEnv, jint 4339 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4340 4341 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4342 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4343 jint ret = JNI_ERR; 4344 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4345 4346 if (!vm_created) { 4347 *penv = NULL; 4348 ret = JNI_EDETACHED; 4349 return ret; 4350 } 4351 4352 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4353 return ret; 4354 } 4355 4356 #ifndef JVMPI_VERSION_1 4357 // need these in order to be polite about older agents 4358 #define JVMPI_VERSION_1 ((jint)0x10000001) 4359 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4360 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4361 #endif // !JVMPI_VERSION_1 4362 4363 Thread* thread = Thread::current_or_null(); 4364 if (thread != NULL && thread->is_Java_thread()) { 4365 if (Threads::is_supported_jni_version_including_1_1(version)) { 4366 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4367 ret = JNI_OK; 4368 return ret; 4369 4370 } else if (version == JVMPI_VERSION_1 || 4371 version == JVMPI_VERSION_1_1 || 4372 version == JVMPI_VERSION_1_2) { 4373 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4374 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4375 ret = JNI_EVERSION; 4376 return ret; 4377 } else if (JvmtiExport::is_jvmdi_version(version)) { 4378 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4379 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4380 ret = JNI_EVERSION; 4381 return ret; 4382 } else { 4383 *penv = NULL; 4384 ret = JNI_EVERSION; 4385 return ret; 4386 } 4387 } else { 4388 *penv = NULL; 4389 ret = JNI_EDETACHED; 4390 return ret; 4391 } 4392 } 4393 4394 4395 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4396 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4397 if (!vm_created) { 4398 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4399 return JNI_ERR; 4400 } 4401 4402 JNIWrapper("AttachCurrentThreadAsDaemon"); 4403 jint ret = attach_current_thread(vm, penv, _args, true); 4404 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4405 return ret; 4406 } 4407 4408 4409 } // End extern "C" 4410 4411 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4412 NULL, 4413 NULL, 4414 NULL, 4415 4416 jni_DestroyJavaVM, 4417 jni_AttachCurrentThread, 4418 jni_DetachCurrentThread, 4419 jni_GetEnv, 4420 jni_AttachCurrentThreadAsDaemon 4421 };