1 /* 2 * Copyright (c) 1997, 2014, 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/classLoader.hpp" 30 #include "classfile/javaClasses.hpp" 31 #include "classfile/symbolTable.hpp" 32 #include "classfile/systemDictionary.hpp" 33 #include "classfile/vmSymbols.hpp" 34 #include "interpreter/linkResolver.hpp" 35 #include "utilities/macros.hpp" 36 #if INCLUDE_ALL_GCS 37 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" 38 #endif // INCLUDE_ALL_GCS 39 #include "memory/allocation.hpp" 40 #include "memory/allocation.inline.hpp" 41 #include "memory/gcLocker.inline.hpp" 42 #include "memory/oopFactory.hpp" 43 #include "memory/universe.inline.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceOop.hpp" 46 #include "oops/markOop.hpp" 47 #include "oops/method.hpp" 48 #include "oops/objArrayKlass.hpp" 49 #include "oops/objArrayOop.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayKlass.hpp" 53 #include "oops/typeArrayOop.hpp" 54 #include "prims/jni.h" 55 #include "prims/jniCheck.hpp" 56 #include "prims/jniExport.hpp" 57 #include "prims/jniFastGetField.hpp" 58 #include "prims/jvm.h" 59 #include "prims/jvm_misc.hpp" 60 #include "prims/jvmtiExport.hpp" 61 #include "prims/jvmtiThreadState.hpp" 62 #include "runtime/atomic.inline.hpp" 63 #include "runtime/compilationPolicy.hpp" 64 #include "runtime/fieldDescriptor.hpp" 65 #include "runtime/fprofiler.hpp" 66 #include "runtime/handles.inline.hpp" 67 #include "runtime/interfaceSupport.hpp" 68 #include "runtime/java.hpp" 69 #include "runtime/javaCalls.hpp" 70 #include "runtime/jfieldIDWorkaround.hpp" 71 #include "runtime/orderAccess.inline.hpp" 72 #include "runtime/reflection.hpp" 73 #include "runtime/sharedRuntime.hpp" 74 #include "runtime/signature.hpp" 75 #include "runtime/thread.inline.hpp" 76 #include "runtime/vm_operations.hpp" 77 #include "services/runtimeService.hpp" 78 #include "trace/tracing.hpp" 79 #include "utilities/defaultStream.hpp" 80 #include "utilities/dtrace.hpp" 81 #include "utilities/events.hpp" 82 #include "utilities/histogram.hpp" 83 #ifdef TARGET_OS_FAMILY_linux 84 # include "os_linux.inline.hpp" 85 #endif 86 #ifdef TARGET_OS_FAMILY_solaris 87 # include "os_solaris.inline.hpp" 88 #endif 89 #ifdef TARGET_OS_FAMILY_windows 90 # include "os_windows.inline.hpp" 91 #endif 92 #ifdef TARGET_OS_FAMILY_bsd 93 # include "os_bsd.inline.hpp" 94 #endif 95 96 static jint CurrentVersion = JNI_VERSION_1_8; 97 98 99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 100 // '-return' probe regardless of the return path is taken out of the function. 101 // Methods that have multiple return paths use this to avoid having to 102 // instrument each return path. Methods that use CHECK or THROW must use this 103 // since those macros can cause an immedate uninstrumented return. 104 // 105 // In order to get the return value, a reference to the variable containing 106 // the return value must be passed to the contructor of the object, and 107 // the return value must be set before return (since the mark object has 108 // a reference to it). 109 // 110 // Example: 111 // DT_RETURN_MARK_DECL(SomeFunc, int); 112 // JNI_ENTRY(int, SomeFunc, ...) 113 // int return_value = 0; 114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 115 // foo(CHECK_0) 116 // return_value = 5; 117 // return return_value; 118 // JNI_END 119 #define DT_RETURN_MARK_DECL(name, type, probe) \ 120 DTRACE_ONLY( \ 121 class DTraceReturnProbeMark_##name { \ 122 public: \ 123 const type& _ret_ref; \ 124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 125 ~DTraceReturnProbeMark_##name() { \ 126 probe; \ 127 } \ 128 } \ 129 ) 130 // Void functions are simpler since there's no return value 131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 132 DTRACE_ONLY( \ 133 class DTraceReturnProbeMark_##name { \ 134 public: \ 135 ~DTraceReturnProbeMark_##name() { \ 136 probe; \ 137 } \ 138 } \ 139 ) 140 141 // Place these macros in the function to mark the return. Non-void 142 // functions need the type and address of the return value. 143 #define DT_RETURN_MARK(name, type, ref) \ 144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 145 #define DT_VOID_RETURN_MARK(name) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 147 148 149 // Use these to select distinct code for floating-point vs. non-floating point 150 // situations. Used from within common macros where we need slightly 151 // different behavior for Float/Double 152 #define FP_SELECT_Boolean(intcode, fpcode) intcode 153 #define FP_SELECT_Byte(intcode, fpcode) intcode 154 #define FP_SELECT_Char(intcode, fpcode) intcode 155 #define FP_SELECT_Short(intcode, fpcode) intcode 156 #define FP_SELECT_Object(intcode, fpcode) intcode 157 #define FP_SELECT_Int(intcode, fpcode) intcode 158 #define FP_SELECT_Long(intcode, fpcode) intcode 159 #define FP_SELECT_Float(intcode, fpcode) fpcode 160 #define FP_SELECT_Double(intcode, fpcode) fpcode 161 #define FP_SELECT(TypeName, intcode, fpcode) \ 162 FP_SELECT_##TypeName(intcode, fpcode) 163 164 #define COMMA , 165 166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 167 // (dtrace doesn't do FP yet) 168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 172 FP_SELECT(TypeName, \ 173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 174 175 176 // out-of-line helpers for class jfieldIDWorkaround: 177 178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 180 uintptr_t as_uint = (uintptr_t) id; 181 intptr_t offset = raw_instance_offset(id); 182 if (is_checked_jfieldID(id)) { 183 if (!klass_hash_ok(k, id)) { 184 return false; 185 } 186 } 187 return InstanceKlass::cast(k)->contains_field_offset(offset); 188 } else { 189 JNIid* result = (JNIid*) id; 190 #ifdef ASSERT 191 return result != NULL && result->is_static_field_id(); 192 #else 193 return result != NULL; 194 #endif 195 } 196 } 197 198 199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 200 if (offset <= small_offset_mask) { 201 Klass* field_klass = k; 202 Klass* super_klass = field_klass->super(); 203 // With compressed oops the most super class with nonstatic fields would 204 // be the owner of fields embedded in the header. 205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 207 field_klass = super_klass; // super contains the field also 208 super_klass = field_klass->super(); 209 } 210 debug_only(No_Safepoint_Verifier nosafepoint;) 211 uintptr_t klass_hash = field_klass->identity_hash(); 212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 213 } else { 214 #if 0 215 #ifndef PRODUCT 216 { 217 ResourceMark rm; 218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 219 } 220 #endif 221 #endif 222 return 0; 223 } 224 } 225 226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 227 uintptr_t as_uint = (uintptr_t) id; 228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 229 do { 230 debug_only(No_Safepoint_Verifier nosafepoint;) 231 // Could use a non-blocking query for identity_hash here... 232 if ((k->identity_hash() & klass_mask) == klass_hash) 233 return true; 234 k = k->super(); 235 } while (k != NULL); 236 return false; 237 } 238 239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 241 uintptr_t as_uint = (uintptr_t) id; 242 intptr_t offset = raw_instance_offset(id); 243 if (VerifyJNIFields) { 244 if (is_checked_jfieldID(id)) { 245 guarantee(klass_hash_ok(k, id), 246 "Bug in native code: jfieldID class must match object"); 247 } else { 248 #if 0 249 #ifndef PRODUCT 250 if (Verbose) { 251 ResourceMark rm; 252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 253 } 254 #endif 255 #endif 256 } 257 } 258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 259 "Bug in native code: jfieldID offset must address interior of object"); 260 } 261 262 // Pick a reasonable higher bound for local capacity requested 263 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too 264 // high because a test (or very unusual application) may try to allocate 265 // that many handles and run out of swap space. An implementation is 266 // permitted to allocate more handles than the ensured capacity, so this 267 // value is set high enough to prevent compatibility problems. 268 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; 269 270 271 // Wrapper to trace JNI functions 272 273 #ifdef ASSERT 274 Histogram* JNIHistogram; 275 static volatile jint JNIHistogram_lock = 0; 276 277 class JNITraceWrapper : public StackObj { 278 public: 279 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { 280 if (TraceJNICalls) { 281 va_list ap; 282 va_start(ap, format); 283 tty->print("JNI "); 284 tty->vprint_cr(format, ap); 285 va_end(ap); 286 } 287 } 288 }; 289 290 class JNIHistogramElement : public HistogramElement { 291 public: 292 JNIHistogramElement(const char* name); 293 }; 294 295 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 296 _name = elementName; 297 uintx count = 0; 298 299 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 300 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 301 count +=1; 302 if ( (WarnOnStalledSpinLock > 0) 303 && (count % WarnOnStalledSpinLock == 0)) { 304 warning("JNIHistogram_lock seems to be stalled"); 305 } 306 } 307 } 308 309 310 if(JNIHistogram == NULL) 311 JNIHistogram = new Histogram("JNI Call Counts",100); 312 313 JNIHistogram->add_element(this); 314 Atomic::dec(&JNIHistogram_lock); 315 } 316 317 #define JNICountWrapper(arg) \ 318 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 319 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 320 if (e != NULL) e->increment_count() 321 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) 322 #else 323 #define JNIWrapper(arg) 324 #endif 325 326 327 // Implementation of JNI entries 328 329 DT_RETURN_MARK_DECL(DefineClass, jclass 330 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 331 332 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 333 const jbyte *buf, jsize bufLen)) 334 JNIWrapper("DefineClass"); 335 336 HOTSPOT_JNI_DEFINECLASS_ENTRY( 337 env, (char*) name, loaderRef, (char*) buf, bufLen); 338 339 jclass cls = NULL; 340 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 341 342 TempNewSymbol class_name = NULL; 343 // Since exceptions can be thrown, class initialization can take place 344 // if name is NULL no check for class name in .class stream has to be made. 345 if (name != NULL) { 346 const int str_len = (int)strlen(name); 347 if (str_len > Symbol::max_length()) { 348 // It's impossible to create this class; the name cannot fit 349 // into the constant pool. 350 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 351 } 352 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 353 } 354 ResourceMark rm(THREAD); 355 ClassFileStream st((u1*) buf, bufLen, NULL); 356 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 357 358 if (UsePerfData && !class_loader.is_null()) { 359 // check whether the current caller thread holds the lock or not. 360 // If not, increment the corresponding counter 361 if (ObjectSynchronizer:: 362 query_lock_ownership((JavaThread*)THREAD, class_loader) != 363 ObjectSynchronizer::owner_self) { 364 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 365 } 366 } 367 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 368 Handle(), &st, true, 369 CHECK_NULL); 370 371 if (TraceClassResolution && k != NULL) { 372 trace_class_resolution(k); 373 } 374 375 cls = (jclass)JNIHandles::make_local( 376 env, k->java_mirror()); 377 return cls; 378 JNI_END 379 380 381 382 static bool first_time_FindClass = true; 383 384 DT_RETURN_MARK_DECL(FindClass, jclass 385 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 386 387 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 388 JNIWrapper("FindClass"); 389 390 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 391 392 jclass result = NULL; 393 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 394 395 // Remember if we are the first invocation of jni_FindClass 396 bool first_time = first_time_FindClass; 397 first_time_FindClass = false; 398 399 // Sanity check the name: it cannot be null or larger than the maximum size 400 // name we can fit in the constant pool. 401 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 402 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 403 } 404 405 //%note jni_3 406 Handle loader; 407 Handle protection_domain; 408 // Find calling class 409 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 410 if (k.not_null()) { 411 loader = Handle(THREAD, k->class_loader()); 412 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 413 // in the correct class context. 414 if (loader.is_null() && 415 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 416 JavaValue result(T_OBJECT); 417 JavaCalls::call_static(&result, k, 418 vmSymbols::getFromClass_name(), 419 vmSymbols::void_class_signature(), 420 thread); 421 if (HAS_PENDING_EXCEPTION) { 422 Handle ex(thread, thread->pending_exception()); 423 CLEAR_PENDING_EXCEPTION; 424 THROW_HANDLE_0(ex); 425 } 426 oop mirror = (oop) result.get_jobject(); 427 loader = Handle(THREAD, 428 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 429 protection_domain = Handle(THREAD, 430 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 431 } 432 } else { 433 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 434 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 435 } 436 437 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 438 result = find_class_from_class_loader(env, sym, true, loader, 439 protection_domain, true, thread); 440 441 if (TraceClassResolution && result != NULL) { 442 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 443 } 444 445 // If we were the first invocation of jni_FindClass, we enable compilation again 446 // rather than just allowing invocation counter to overflow and decay. 447 // Controlled by flag DelayCompilationDuringStartup. 448 if (first_time && !CompileTheWorld) 449 CompilationPolicy::completed_vm_startup(); 450 451 return result; 452 JNI_END 453 454 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 455 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 456 457 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 458 JNIWrapper("FromReflectedMethod"); 459 460 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 461 462 jmethodID ret = NULL; 463 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 464 465 // method is a handle to a java.lang.reflect.Method object 466 oop reflected = JNIHandles::resolve_non_null(method); 467 oop mirror = NULL; 468 int slot = 0; 469 470 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 471 mirror = java_lang_reflect_Constructor::clazz(reflected); 472 slot = java_lang_reflect_Constructor::slot(reflected); 473 } else { 474 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 475 mirror = java_lang_reflect_Method::clazz(reflected); 476 slot = java_lang_reflect_Method::slot(reflected); 477 } 478 Klass* k = java_lang_Class::as_Klass(mirror); 479 480 KlassHandle k1(THREAD, k); 481 // Make sure class is initialized before handing id's out to methods 482 k1()->initialize(CHECK_NULL); 483 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 484 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 485 return ret; 486 JNI_END 487 488 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 489 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 490 491 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 492 JNIWrapper("FromReflectedField"); 493 494 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 495 496 jfieldID ret = NULL; 497 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 498 499 // field is a handle to a java.lang.reflect.Field object 500 oop reflected = JNIHandles::resolve_non_null(field); 501 oop mirror = java_lang_reflect_Field::clazz(reflected); 502 Klass* k = java_lang_Class::as_Klass(mirror); 503 int slot = java_lang_reflect_Field::slot(reflected); 504 int modifiers = java_lang_reflect_Field::modifiers(reflected); 505 506 KlassHandle k1(THREAD, k); 507 // Make sure class is initialized before handing id's out to fields 508 k1()->initialize(CHECK_NULL); 509 510 // First check if this is a static field 511 if (modifiers & JVM_ACC_STATIC) { 512 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 513 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 514 assert(id != NULL, "corrupt Field object"); 515 debug_only(id->set_is_static_field_id();) 516 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 517 ret = jfieldIDWorkaround::to_static_jfieldID(id); 518 return ret; 519 } 520 521 // The slot is the index of the field description in the field-array 522 // The jfieldID is the offset of the field within the object 523 // It may also have hash bits for k, if VerifyJNIFields is turned on. 524 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 525 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 526 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 527 return ret; 528 JNI_END 529 530 531 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 532 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 533 534 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 535 JNIWrapper("ToReflectedMethod"); 536 537 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 538 539 jobject ret = NULL; 540 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 541 542 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 543 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 544 oop reflection_method; 545 if (m->is_initializer()) { 546 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 547 } else { 548 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 549 } 550 ret = JNIHandles::make_local(env, reflection_method); 551 return ret; 552 JNI_END 553 554 DT_RETURN_MARK_DECL(GetSuperclass, jclass 555 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 556 557 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 558 JNIWrapper("GetSuperclass"); 559 560 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 561 562 jclass obj = NULL; 563 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 564 565 oop mirror = JNIHandles::resolve_non_null(sub); 566 // primitive classes return NULL 567 if (java_lang_Class::is_primitive(mirror)) return NULL; 568 569 // Rules of Class.getSuperClass as implemented by KLass::java_super: 570 // arrays return Object 571 // interfaces return NULL 572 // proper classes return Klass::super() 573 Klass* k = java_lang_Class::as_Klass(mirror); 574 if (k->is_interface()) return NULL; 575 576 // return mirror for superclass 577 Klass* super = k->java_super(); 578 // super2 is the value computed by the compiler's getSuperClass intrinsic: 579 debug_only(Klass* super2 = ( k->oop_is_array() 580 ? SystemDictionary::Object_klass() 581 : k->super() ) ); 582 assert(super == super2, 583 "java_super computation depends on interface, array, other super"); 584 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 585 return obj; 586 JNI_END 587 588 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 589 JNIWrapper("IsSubclassOf"); 590 591 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 592 593 oop sub_mirror = JNIHandles::resolve_non_null(sub); 594 oop super_mirror = JNIHandles::resolve_non_null(super); 595 if (java_lang_Class::is_primitive(sub_mirror) || 596 java_lang_Class::is_primitive(super_mirror)) { 597 jboolean ret = (sub_mirror == super_mirror); 598 599 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 600 return ret; 601 } 602 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 603 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 604 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 605 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 606 JNI_TRUE : JNI_FALSE; 607 608 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 609 return ret; 610 JNI_END 611 612 613 DT_RETURN_MARK_DECL(Throw, jint 614 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 615 616 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 617 JNIWrapper("Throw"); 618 619 HOTSPOT_JNI_THROW_ENTRY(env, obj); 620 621 jint ret = JNI_OK; 622 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 623 624 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 625 ShouldNotReachHere(); 626 JNI_END 627 628 629 DT_RETURN_MARK_DECL(ThrowNew, jint 630 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 631 632 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 633 JNIWrapper("ThrowNew"); 634 635 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 636 637 jint ret = JNI_OK; 638 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 639 640 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 641 Symbol* name = k->name(); 642 Handle class_loader (THREAD, k->class_loader()); 643 Handle protection_domain (THREAD, k->protection_domain()); 644 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 645 ShouldNotReachHere(); 646 JNI_END 647 648 649 // JNI functions only transform a pending async exception to a synchronous 650 // exception in ExceptionOccurred and ExceptionCheck calls, since 651 // delivering an async exception in other places won't change the native 652 // code's control flow and would be harmful when native code further calls 653 // JNI functions with a pending exception. Async exception is also checked 654 // during the call, so ExceptionOccurred/ExceptionCheck won't return 655 // false but deliver the async exception at the very end during 656 // state transition. 657 658 static void jni_check_async_exceptions(JavaThread *thread) { 659 assert(thread == Thread::current(), "must be itself"); 660 thread->check_and_handle_async_exceptions(); 661 } 662 663 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 664 JNIWrapper("ExceptionOccurred"); 665 666 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 667 668 jni_check_async_exceptions(thread); 669 oop exception = thread->pending_exception(); 670 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 671 672 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 673 return ret; 674 JNI_END 675 676 677 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 678 JNIWrapper("ExceptionDescribe"); 679 680 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 681 682 if (thread->has_pending_exception()) { 683 Handle ex(thread, thread->pending_exception()); 684 thread->clear_pending_exception(); 685 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 686 // Don't print anything if we are being killed. 687 } else { 688 jio_fprintf(defaultStream::error_stream(), "Exception "); 689 if (thread != NULL && thread->threadObj() != NULL) { 690 ResourceMark rm(THREAD); 691 jio_fprintf(defaultStream::error_stream(), 692 "in thread \"%s\" ", thread->get_thread_name()); 693 } 694 if (ex->is_a(SystemDictionary::Throwable_klass())) { 695 JavaValue result(T_VOID); 696 JavaCalls::call_virtual(&result, 697 ex, 698 KlassHandle(THREAD, 699 SystemDictionary::Throwable_klass()), 700 vmSymbols::printStackTrace_name(), 701 vmSymbols::void_method_signature(), 702 THREAD); 703 // If an exception is thrown in the call it gets thrown away. Not much 704 // we can do with it. The native code that calls this, does not check 705 // for the exception - hence, it might still be in the thread when DestroyVM gets 706 // called, potentially causing a few asserts to trigger - since no pending exception 707 // is expected. 708 CLEAR_PENDING_EXCEPTION; 709 } else { 710 ResourceMark rm(THREAD); 711 jio_fprintf(defaultStream::error_stream(), 712 ". Uncaught exception of type %s.", 713 ex->klass()->external_name()); 714 } 715 } 716 } 717 718 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 719 JNI_END 720 721 722 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 723 JNIWrapper("ExceptionClear"); 724 725 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 726 727 // The jni code might be using this API to clear java thrown exception. 728 // So just mark jvmti thread exception state as exception caught. 729 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 730 if (state != NULL && state->is_exception_detected()) { 731 state->set_exception_caught(); 732 } 733 thread->clear_pending_exception(); 734 735 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 736 JNI_END 737 738 739 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 740 JNIWrapper("FatalError"); 741 742 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 743 744 tty->print_cr("FATAL ERROR in native method: %s", msg); 745 thread->print_stack(); 746 os::abort(); // Dump core and abort 747 JNI_END 748 749 750 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 751 JNIWrapper("PushLocalFrame"); 752 753 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 754 755 //%note jni_11 756 if (capacity < 0 || capacity > MAX_REASONABLE_LOCAL_CAPACITY) { 757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 758 return JNI_ERR; 759 } 760 JNIHandleBlock* old_handles = thread->active_handles(); 761 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 762 assert(new_handles != NULL, "should not be NULL"); 763 new_handles->set_pop_frame_link(old_handles); 764 thread->set_active_handles(new_handles); 765 jint ret = JNI_OK; 766 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 767 return ret; 768 JNI_END 769 770 771 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 772 JNIWrapper("PopLocalFrame"); 773 774 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 775 776 //%note jni_11 777 Handle result_handle(thread, JNIHandles::resolve(result)); 778 JNIHandleBlock* old_handles = thread->active_handles(); 779 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 780 if (new_handles != NULL) { 781 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 782 // This way code will still work if PopLocalFrame is called without a corresponding 783 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 784 // the release_block call will release the blocks. 785 thread->set_active_handles(new_handles); 786 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 787 JNIHandleBlock::release_block(old_handles, thread); // may block 788 result = JNIHandles::make_local(thread, result_handle()); 789 } 790 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 791 return result; 792 JNI_END 793 794 795 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 796 JNIWrapper("NewGlobalRef"); 797 798 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 799 800 Handle ref_handle(thread, JNIHandles::resolve(ref)); 801 jobject ret = JNIHandles::make_global(ref_handle); 802 803 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 804 return ret; 805 JNI_END 806 807 // Must be JNI_ENTRY (with HandleMark) 808 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 809 JNIWrapper("DeleteGlobalRef"); 810 811 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 812 813 JNIHandles::destroy_global(ref); 814 815 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 816 JNI_END 817 818 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 819 JNIWrapper("DeleteLocalRef"); 820 821 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 822 823 JNIHandles::destroy_local(obj); 824 825 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 826 JNI_END 827 828 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 829 JNIWrapper("IsSameObject"); 830 831 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 832 833 oop a = JNIHandles::resolve(r1); 834 oop b = JNIHandles::resolve(r2); 835 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 836 837 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 838 return ret; 839 JNI_END 840 841 842 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 843 JNIWrapper("NewLocalRef"); 844 845 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 846 847 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 848 849 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 850 return ret; 851 JNI_END 852 853 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 854 JNIWrapper("EnsureLocalCapacity"); 855 856 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 857 858 jint ret; 859 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { 860 ret = JNI_OK; 861 } else { 862 ret = JNI_ERR; 863 } 864 865 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 866 return ret; 867 JNI_END 868 869 // Return the Handle Type 870 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 871 JNIWrapper("GetObjectRefType"); 872 873 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 874 875 jobjectRefType ret; 876 if (JNIHandles::is_local_handle(thread, obj) || 877 JNIHandles::is_frame_handle(thread, obj)) 878 ret = JNILocalRefType; 879 else if (JNIHandles::is_global_handle(obj)) 880 ret = JNIGlobalRefType; 881 else if (JNIHandles::is_weak_global_handle(obj)) 882 ret = JNIWeakGlobalRefType; 883 else 884 ret = JNIInvalidRefType; 885 886 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 887 return ret; 888 JNI_END 889 890 891 class JNI_ArgumentPusher : public SignatureIterator { 892 protected: 893 JavaCallArguments* _arguments; 894 895 virtual void get_bool () = 0; 896 virtual void get_char () = 0; 897 virtual void get_short () = 0; 898 virtual void get_byte () = 0; 899 virtual void get_int () = 0; 900 virtual void get_long () = 0; 901 virtual void get_float () = 0; 902 virtual void get_double () = 0; 903 virtual void get_object () = 0; 904 905 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 906 this->_return_type = T_ILLEGAL; 907 _arguments = NULL; 908 } 909 910 public: 911 virtual void iterate( uint64_t fingerprint ) = 0; 912 913 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 914 915 inline void do_bool() { if (!is_return_type()) get_bool(); } 916 inline void do_char() { if (!is_return_type()) get_char(); } 917 inline void do_short() { if (!is_return_type()) get_short(); } 918 inline void do_byte() { if (!is_return_type()) get_byte(); } 919 inline void do_int() { if (!is_return_type()) get_int(); } 920 inline void do_long() { if (!is_return_type()) get_long(); } 921 inline void do_float() { if (!is_return_type()) get_float(); } 922 inline void do_double() { if (!is_return_type()) get_double(); } 923 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 924 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 925 inline void do_void() { } 926 927 JavaCallArguments* arguments() { return _arguments; } 928 void push_receiver(Handle h) { _arguments->push_oop(h); } 929 }; 930 931 932 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 933 protected: 934 va_list _ap; 935 936 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 937 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 938 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 939 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 940 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 941 942 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 943 944 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 945 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 946 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 947 inline void get_object() { jobject l = va_arg(_ap, jobject); 948 _arguments->push_oop(Handle((oop *)l, false)); } 949 950 inline void set_ap(va_list rap) { 951 #ifdef va_copy 952 va_copy(_ap, rap); 953 #elif defined (__va_copy) 954 __va_copy(_ap, rap); 955 #else 956 _ap = rap; 957 #endif 958 } 959 960 public: 961 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 962 : JNI_ArgumentPusher(signature) { 963 set_ap(rap); 964 } 965 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 966 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 967 set_ap(rap); 968 } 969 970 // Optimized path if we have the bitvector form of signature 971 void iterate( uint64_t fingerprint ) { 972 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments 973 else { 974 _return_type = (BasicType)((fingerprint >> static_feature_size) & 975 result_feature_mask); 976 977 assert(fingerprint, "Fingerprint should not be 0"); 978 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 979 while ( 1 ) { 980 switch ( fingerprint & parameter_feature_mask ) { 981 case bool_parm: 982 case char_parm: 983 case short_parm: 984 case byte_parm: 985 case int_parm: 986 get_int(); 987 break; 988 case obj_parm: 989 get_object(); 990 break; 991 case long_parm: 992 get_long(); 993 break; 994 case float_parm: 995 get_float(); 996 break; 997 case double_parm: 998 get_double(); 999 break; 1000 case done_parm: 1001 return; 1002 break; 1003 default: 1004 ShouldNotReachHere(); 1005 break; 1006 } 1007 fingerprint >>= parameter_feature_size; 1008 } 1009 } 1010 } 1011 }; 1012 1013 1014 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1015 protected: 1016 const jvalue *_ap; 1017 1018 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 1019 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1020 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1021 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1022 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1023 1024 inline void get_long() { _arguments->push_long((_ap++)->j); } 1025 inline void get_float() { _arguments->push_float((_ap++)->f); } 1026 inline void get_double() { _arguments->push_double((_ap++)->d);} 1027 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1028 1029 inline void set_ap(const jvalue *rap) { _ap = rap; } 1030 1031 public: 1032 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1033 : JNI_ArgumentPusher(signature) { 1034 set_ap(rap); 1035 } 1036 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1037 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1038 set_ap(rap); 1039 } 1040 1041 // Optimized path if we have the bitvector form of signature 1042 void iterate( uint64_t fingerprint ) { 1043 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments 1044 else { 1045 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1046 result_feature_mask); 1047 assert(fingerprint, "Fingerprint should not be 0"); 1048 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1049 while ( 1 ) { 1050 switch ( fingerprint & parameter_feature_mask ) { 1051 case bool_parm: 1052 get_bool(); 1053 break; 1054 case char_parm: 1055 get_char(); 1056 break; 1057 case short_parm: 1058 get_short(); 1059 break; 1060 case byte_parm: 1061 get_byte(); 1062 break; 1063 case int_parm: 1064 get_int(); 1065 break; 1066 case obj_parm: 1067 get_object(); 1068 break; 1069 case long_parm: 1070 get_long(); 1071 break; 1072 case float_parm: 1073 get_float(); 1074 break; 1075 case double_parm: 1076 get_double(); 1077 break; 1078 case done_parm: 1079 return; 1080 break; 1081 default: 1082 ShouldNotReachHere(); 1083 break; 1084 } 1085 fingerprint >>= parameter_feature_size; 1086 } 1087 } 1088 } 1089 }; 1090 1091 1092 enum JNICallType { 1093 JNI_STATIC, 1094 JNI_VIRTUAL, 1095 JNI_NONVIRTUAL 1096 }; 1097 1098 1099 1100 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1101 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1102 1103 // Create object to hold arguments for the JavaCall, and associate it with 1104 // the jni parser 1105 ResourceMark rm(THREAD); 1106 int number_of_parameters = method->size_of_parameters(); 1107 JavaCallArguments java_args(number_of_parameters); 1108 args->set_java_argument_object(&java_args); 1109 1110 assert(method->is_static(), "method should be static"); 1111 1112 // Fill out JavaCallArguments object 1113 args->iterate( Fingerprinter(method).fingerprint() ); 1114 // Initialize result type 1115 result->set_type(args->get_ret_type()); 1116 1117 // Invoke the method. Result is returned as oop. 1118 JavaCalls::call(result, method, &java_args, CHECK); 1119 1120 // Convert result 1121 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1122 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1123 } 1124 } 1125 1126 1127 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1128 oop recv = JNIHandles::resolve(receiver); 1129 if (recv == NULL) { 1130 THROW(vmSymbols::java_lang_NullPointerException()); 1131 } 1132 Handle h_recv(THREAD, recv); 1133 1134 int number_of_parameters; 1135 Method* selected_method; 1136 { 1137 Method* m = Method::resolve_jmethod_id(method_id); 1138 number_of_parameters = m->size_of_parameters(); 1139 Klass* holder = m->method_holder(); 1140 if (!(holder)->is_interface()) { 1141 // non-interface call -- for that little speed boost, don't handlize 1142 debug_only(No_Safepoint_Verifier nosafepoint;) 1143 if (call_type == JNI_VIRTUAL) { 1144 // jni_GetMethodID makes sure class is linked and initialized 1145 // so m should have a valid vtable index. 1146 assert(!m->has_itable_index(), ""); 1147 int vtbl_index = m->vtable_index(); 1148 if (vtbl_index != Method::nonvirtual_vtable_index) { 1149 Klass* k = h_recv->klass(); 1150 // k might be an arrayKlassOop but all vtables start at 1151 // the same place. The cast is to avoid virtual call and assertion. 1152 InstanceKlass *ik = (InstanceKlass*)k; 1153 selected_method = ik->method_at_vtable(vtbl_index); 1154 } else { 1155 // final method 1156 selected_method = m; 1157 } 1158 } else { 1159 // JNI_NONVIRTUAL call 1160 selected_method = m; 1161 } 1162 } else { 1163 // interface call 1164 KlassHandle h_holder(THREAD, holder); 1165 1166 if (call_type == JNI_VIRTUAL) { 1167 int itbl_index = m->itable_index(); 1168 Klass* k = h_recv->klass(); 1169 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1170 } else { 1171 selected_method = m; 1172 } 1173 } 1174 } 1175 1176 methodHandle method(THREAD, selected_method); 1177 1178 // Create object to hold arguments for the JavaCall, and associate it with 1179 // the jni parser 1180 ResourceMark rm(THREAD); 1181 JavaCallArguments java_args(number_of_parameters); 1182 args->set_java_argument_object(&java_args); 1183 1184 // handle arguments 1185 assert(!method->is_static(), "method should not be static"); 1186 args->push_receiver(h_recv); // Push jobject handle 1187 1188 // Fill out JavaCallArguments object 1189 args->iterate( Fingerprinter(method).fingerprint() ); 1190 // Initialize result type 1191 result->set_type(args->get_ret_type()); 1192 1193 // Invoke the method. Result is returned as oop. 1194 JavaCalls::call(result, method, &java_args, CHECK); 1195 1196 // Convert result 1197 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1198 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1199 } 1200 } 1201 1202 1203 static instanceOop alloc_object(jclass clazz, TRAPS) { 1204 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1205 if (k == NULL) { 1206 ResourceMark rm(THREAD); 1207 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1208 } 1209 k()->check_valid_for_instantiation(false, CHECK_NULL); 1210 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1211 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1212 return ih; 1213 } 1214 1215 DT_RETURN_MARK_DECL(AllocObject, jobject 1216 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1217 1218 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1219 JNIWrapper("AllocObject"); 1220 1221 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1222 1223 jobject ret = NULL; 1224 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1225 1226 instanceOop i = alloc_object(clazz, CHECK_NULL); 1227 ret = JNIHandles::make_local(env, i); 1228 return ret; 1229 JNI_END 1230 1231 DT_RETURN_MARK_DECL(NewObjectA, jobject 1232 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1233 1234 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1235 JNIWrapper("NewObjectA"); 1236 1237 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1238 1239 jobject obj = NULL; 1240 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1241 1242 instanceOop i = alloc_object(clazz, CHECK_NULL); 1243 obj = JNIHandles::make_local(env, i); 1244 JavaValue jvalue(T_VOID); 1245 JNI_ArgumentPusherArray ap(methodID, args); 1246 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1247 return obj; 1248 JNI_END 1249 1250 1251 DT_RETURN_MARK_DECL(NewObjectV, jobject 1252 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1253 1254 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1255 JNIWrapper("NewObjectV"); 1256 1257 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1258 1259 jobject obj = NULL; 1260 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1261 1262 instanceOop i = alloc_object(clazz, CHECK_NULL); 1263 obj = JNIHandles::make_local(env, i); 1264 JavaValue jvalue(T_VOID); 1265 JNI_ArgumentPusherVaArg ap(methodID, args); 1266 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1267 return obj; 1268 JNI_END 1269 1270 1271 DT_RETURN_MARK_DECL(NewObject, jobject 1272 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1273 1274 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1275 JNIWrapper("NewObject"); 1276 1277 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1278 1279 jobject obj = NULL; 1280 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1281 1282 instanceOop i = alloc_object(clazz, CHECK_NULL); 1283 obj = JNIHandles::make_local(env, i); 1284 va_list args; 1285 va_start(args, methodID); 1286 JavaValue jvalue(T_VOID); 1287 JNI_ArgumentPusherVaArg ap(methodID, args); 1288 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1289 va_end(args); 1290 return obj; 1291 JNI_END 1292 1293 1294 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1295 JNIWrapper("GetObjectClass"); 1296 1297 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1298 1299 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1300 jclass ret = 1301 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1302 1303 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1304 return ret; 1305 JNI_END 1306 1307 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1308 JNIWrapper("IsInstanceOf"); 1309 1310 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1311 1312 jboolean ret = JNI_TRUE; 1313 if (obj != NULL) { 1314 ret = JNI_FALSE; 1315 Klass* k = java_lang_Class::as_Klass( 1316 JNIHandles::resolve_non_null(clazz)); 1317 if (k != NULL) { 1318 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1319 } 1320 } 1321 1322 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1323 return ret; 1324 JNI_END 1325 1326 1327 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1328 const char *sig, bool is_static, TRAPS) { 1329 // %%%% This code should probably just call into a method in the LinkResolver 1330 // 1331 // The class should have been loaded (we have an instance of the class 1332 // passed in) so the method and signature should already be in the symbol 1333 // table. If they're not there, the method doesn't exist. 1334 const char *name_to_probe = (name_str == NULL) 1335 ? vmSymbols::object_initializer_name()->as_C_string() 1336 : name_str; 1337 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1338 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1339 1340 if (name == NULL || signature == NULL) { 1341 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1342 } 1343 1344 // Throw a NoSuchMethodError exception if we have an instance of a 1345 // primitive java.lang.Class 1346 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1347 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1348 } 1349 1350 KlassHandle klass(THREAD, 1351 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1352 1353 // Make sure class is linked and initialized before handing id's out to 1354 // Method*s. 1355 klass()->initialize(CHECK_NULL); 1356 1357 Method* m; 1358 if (name == vmSymbols::object_initializer_name() || 1359 name == vmSymbols::class_initializer_name()) { 1360 // Never search superclasses for constructors 1361 if (klass->oop_is_instance()) { 1362 m = InstanceKlass::cast(klass())->find_method(name, signature); 1363 } else { 1364 m = NULL; 1365 } 1366 } else { 1367 m = klass->lookup_method(name, signature); 1368 if (m == NULL && klass->oop_is_instance()) { 1369 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1370 } 1371 } 1372 if (m == NULL || (m->is_static() != is_static)) { 1373 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1374 } 1375 return m->jmethod_id(); 1376 } 1377 1378 1379 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1380 const char *name, const char *sig)) 1381 JNIWrapper("GetMethodID"); 1382 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1383 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1384 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1385 return ret; 1386 JNI_END 1387 1388 1389 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1390 const char *name, const char *sig)) 1391 JNIWrapper("GetStaticMethodID"); 1392 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1393 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1394 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1395 return ret; 1396 JNI_END 1397 1398 1399 1400 // 1401 // Calling Methods 1402 // 1403 1404 1405 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1406 , EntryProbe, ReturnProbe) \ 1407 \ 1408 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1409 , ReturnProbe); \ 1410 \ 1411 JNI_ENTRY(ResultType, \ 1412 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1413 JNIWrapper("Call" XSTR(Result) "Method"); \ 1414 \ 1415 EntryProbe; \ 1416 ResultType ret = 0;\ 1417 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1418 (const ResultType&)ret);\ 1419 \ 1420 va_list args; \ 1421 va_start(args, methodID); \ 1422 JavaValue jvalue(Tag); \ 1423 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1424 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1425 va_end(args); \ 1426 ret = jvalue.get_##ResultType(); \ 1427 return ret;\ 1428 JNI_END 1429 1430 // the runtime type of subword integral basic types is integer 1431 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1432 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1434 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1435 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1436 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1437 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1438 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1439 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1440 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1441 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1442 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1443 1444 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1445 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1446 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1447 DEFINE_CALLMETHOD(jint, Int, T_INT, 1448 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1449 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1450 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1451 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1452 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1453 // Float and double probes don't return value because dtrace doesn't currently support it 1454 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1455 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1456 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1457 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1458 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1459 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1460 1461 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1462 , EntryProbe, ReturnProbe) \ 1463 \ 1464 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1465 , ReturnProbe); \ 1466 \ 1467 JNI_ENTRY(ResultType, \ 1468 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1469 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1470 \ 1471 EntryProbe;\ 1472 ResultType ret = 0;\ 1473 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1474 (const ResultType&)ret);\ 1475 \ 1476 JavaValue jvalue(Tag); \ 1477 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1478 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1479 ret = jvalue.get_##ResultType(); \ 1480 return ret;\ 1481 JNI_END 1482 1483 // the runtime type of subword integral basic types is integer 1484 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1485 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1487 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1488 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1489 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1490 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1491 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1492 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1493 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1494 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1495 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1496 1497 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1498 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1499 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1500 DEFINE_CALLMETHODV(jint, Int, T_INT, 1501 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1502 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1503 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1504 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1505 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1506 // Float and double probes don't return value because dtrace doesn't currently support it 1507 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1508 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1509 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1510 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1511 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1512 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1513 1514 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1515 , EntryProbe, ReturnProbe) \ 1516 \ 1517 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1518 , ReturnProbe); \ 1519 \ 1520 JNI_ENTRY(ResultType, \ 1521 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1522 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1523 EntryProbe; \ 1524 ResultType ret = 0;\ 1525 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1526 (const ResultType&)ret);\ 1527 \ 1528 JavaValue jvalue(Tag); \ 1529 JNI_ArgumentPusherArray ap(methodID, args); \ 1530 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1531 ret = jvalue.get_##ResultType(); \ 1532 return ret;\ 1533 JNI_END 1534 1535 // the runtime type of subword integral basic types is integer 1536 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1537 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1539 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1540 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1541 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1542 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1543 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1544 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1545 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1546 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1547 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1548 1549 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1550 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1551 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1552 DEFINE_CALLMETHODA(jint, Int, T_INT, 1553 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1554 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1555 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1556 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1557 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1558 // Float and double probes don't return value because dtrace doesn't currently support it 1559 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1560 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1561 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1562 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1563 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1564 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1565 1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1567 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1568 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1569 1570 1571 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1572 JNIWrapper("CallVoidMethod"); 1573 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1574 DT_VOID_RETURN_MARK(CallVoidMethod); 1575 1576 va_list args; 1577 va_start(args, methodID); 1578 JavaValue jvalue(T_VOID); 1579 JNI_ArgumentPusherVaArg ap(methodID, args); 1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1581 va_end(args); 1582 JNI_END 1583 1584 1585 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1586 JNIWrapper("CallVoidMethodV"); 1587 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1588 DT_VOID_RETURN_MARK(CallVoidMethodV); 1589 1590 JavaValue jvalue(T_VOID); 1591 JNI_ArgumentPusherVaArg ap(methodID, args); 1592 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1593 JNI_END 1594 1595 1596 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1597 JNIWrapper("CallVoidMethodA"); 1598 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1599 DT_VOID_RETURN_MARK(CallVoidMethodA); 1600 1601 JavaValue jvalue(T_VOID); 1602 JNI_ArgumentPusherArray ap(methodID, args); 1603 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1604 JNI_END 1605 1606 1607 1608 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1609 , EntryProbe, ReturnProbe) \ 1610 \ 1611 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1612 , ReturnProbe);\ 1613 \ 1614 JNI_ENTRY(ResultType, \ 1615 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1616 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1617 \ 1618 EntryProbe;\ 1619 ResultType ret;\ 1620 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1621 (const ResultType&)ret);\ 1622 \ 1623 va_list args; \ 1624 va_start(args, methodID); \ 1625 JavaValue jvalue(Tag); \ 1626 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1627 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1628 va_end(args); \ 1629 ret = jvalue.get_##ResultType(); \ 1630 return ret;\ 1631 JNI_END 1632 1633 // the runtime type of subword integral basic types is integer 1634 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1635 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1637 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1638 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1639 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1640 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1641 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1642 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1643 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1644 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1645 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1646 1647 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1648 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1649 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1650 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1651 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1652 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1653 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1654 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1655 // Float and double probes don't return value because dtrace doesn't currently support it 1656 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1657 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1658 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1659 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1660 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1661 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1662 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1663 1664 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1665 , EntryProbe, ReturnProbe) \ 1666 \ 1667 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1668 , ReturnProbe);\ 1669 \ 1670 JNI_ENTRY(ResultType, \ 1671 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1672 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1673 \ 1674 EntryProbe;\ 1675 ResultType ret;\ 1676 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1677 (const ResultType&)ret);\ 1678 \ 1679 JavaValue jvalue(Tag); \ 1680 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1681 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1682 ret = jvalue.get_##ResultType(); \ 1683 return ret;\ 1684 JNI_END 1685 1686 // the runtime type of subword integral basic types is integer 1687 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1688 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1690 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1691 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1692 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1693 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1694 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1695 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1696 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1697 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1698 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1699 1700 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1701 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1702 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1703 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1704 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1705 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1706 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1707 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1708 // Float and double probes don't return value because dtrace doesn't currently support it 1709 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1710 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1711 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1712 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1713 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1714 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1715 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1716 1717 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1718 , EntryProbe, ReturnProbe) \ 1719 \ 1720 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1721 , ReturnProbe);\ 1722 \ 1723 JNI_ENTRY(ResultType, \ 1724 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1725 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1726 \ 1727 EntryProbe;\ 1728 ResultType ret;\ 1729 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1730 (const ResultType&)ret);\ 1731 \ 1732 JavaValue jvalue(Tag); \ 1733 JNI_ArgumentPusherArray ap(methodID, args); \ 1734 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1735 ret = jvalue.get_##ResultType(); \ 1736 return ret;\ 1737 JNI_END 1738 1739 // the runtime type of subword integral basic types is integer 1740 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1741 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1743 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1744 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1745 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1746 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1747 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1748 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1749 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1750 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1751 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1752 1753 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1754 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1755 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1756 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1757 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1758 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1759 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1760 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1761 // Float and double probes don't return value because dtrace doesn't currently support it 1762 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1763 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1764 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1765 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1766 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1767 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1768 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1769 1770 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1771 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1772 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1773 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1774 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1775 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1776 1777 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1778 JNIWrapper("CallNonvirtualVoidMethod"); 1779 1780 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1781 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1782 1783 va_list args; 1784 va_start(args, methodID); 1785 JavaValue jvalue(T_VOID); 1786 JNI_ArgumentPusherVaArg ap(methodID, args); 1787 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1788 va_end(args); 1789 JNI_END 1790 1791 1792 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1793 JNIWrapper("CallNonvirtualVoidMethodV"); 1794 1795 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1796 env, obj, cls, (uintptr_t) methodID); 1797 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1798 1799 JavaValue jvalue(T_VOID); 1800 JNI_ArgumentPusherVaArg ap(methodID, args); 1801 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1802 JNI_END 1803 1804 1805 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1806 JNIWrapper("CallNonvirtualVoidMethodA"); 1807 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1808 env, obj, cls, (uintptr_t) methodID); 1809 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1810 JavaValue jvalue(T_VOID); 1811 JNI_ArgumentPusherArray ap(methodID, args); 1812 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1813 JNI_END 1814 1815 1816 1817 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1818 , EntryProbe, ResultProbe) \ 1819 \ 1820 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1821 , ResultProbe); \ 1822 \ 1823 JNI_ENTRY(ResultType, \ 1824 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1825 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1826 \ 1827 EntryProbe; \ 1828 ResultType ret = 0;\ 1829 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1830 (const ResultType&)ret);\ 1831 \ 1832 va_list args; \ 1833 va_start(args, methodID); \ 1834 JavaValue jvalue(Tag); \ 1835 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1836 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1837 va_end(args); \ 1838 ret = jvalue.get_##ResultType(); \ 1839 return ret;\ 1840 JNI_END 1841 1842 // the runtime type of subword integral basic types is integer 1843 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1844 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1846 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1847 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1848 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1849 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1850 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1851 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1852 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1853 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1854 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1855 1856 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1857 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1858 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1859 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1860 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1861 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1862 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1863 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1864 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1865 // Float and double probes don't return value because dtrace doesn't currently support it 1866 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1867 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1868 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1869 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1870 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1871 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1872 1873 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1874 , EntryProbe, ResultProbe) \ 1875 \ 1876 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1877 , ResultProbe); \ 1878 \ 1879 JNI_ENTRY(ResultType, \ 1880 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1881 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1882 \ 1883 EntryProbe; \ 1884 ResultType ret = 0;\ 1885 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1886 (const ResultType&)ret);\ 1887 \ 1888 JavaValue jvalue(Tag); \ 1889 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1890 /* Make sure class is initialized before trying to invoke its method */ \ 1891 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1892 k()->initialize(CHECK_0); \ 1893 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1894 va_end(args); \ 1895 ret = jvalue.get_##ResultType(); \ 1896 return ret;\ 1897 JNI_END 1898 1899 // the runtime type of subword integral basic types is integer 1900 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1901 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1903 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1904 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1905 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1906 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1907 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1908 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1909 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1910 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1911 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1912 1913 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1914 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1915 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1916 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1917 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1918 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1919 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1920 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1921 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1922 // Float and double probes don't return value because dtrace doesn't currently support it 1923 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1924 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1925 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1926 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1927 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1928 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1929 1930 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1931 , EntryProbe, ResultProbe) \ 1932 \ 1933 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1934 , ResultProbe); \ 1935 \ 1936 JNI_ENTRY(ResultType, \ 1937 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1938 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1939 \ 1940 EntryProbe; \ 1941 ResultType ret = 0;\ 1942 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1943 (const ResultType&)ret);\ 1944 \ 1945 JavaValue jvalue(Tag); \ 1946 JNI_ArgumentPusherArray ap(methodID, args); \ 1947 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1948 ret = jvalue.get_##ResultType(); \ 1949 return ret;\ 1950 JNI_END 1951 1952 // the runtime type of subword integral basic types is integer 1953 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1954 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1956 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1957 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1958 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1959 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1960 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1961 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1962 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1963 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1964 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1965 1966 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1967 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1968 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1969 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1970 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1971 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1972 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1973 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1974 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1975 // Float and double probes don't return value because dtrace doesn't currently support it 1976 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1977 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1978 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1979 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1980 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1981 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1982 1983 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1984 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1985 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1986 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1987 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1988 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1989 1990 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1991 JNIWrapper("CallStaticVoidMethod"); 1992 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1993 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1994 1995 va_list args; 1996 va_start(args, methodID); 1997 JavaValue jvalue(T_VOID); 1998 JNI_ArgumentPusherVaArg ap(methodID, args); 1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2000 va_end(args); 2001 JNI_END 2002 2003 2004 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 2005 JNIWrapper("CallStaticVoidMethodV"); 2006 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 2007 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 2008 2009 JavaValue jvalue(T_VOID); 2010 JNI_ArgumentPusherVaArg ap(methodID, args); 2011 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2012 JNI_END 2013 2014 2015 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2016 JNIWrapper("CallStaticVoidMethodA"); 2017 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2018 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2019 2020 JavaValue jvalue(T_VOID); 2021 JNI_ArgumentPusherArray ap(methodID, args); 2022 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2023 JNI_END 2024 2025 2026 // 2027 // Accessing Fields 2028 // 2029 2030 2031 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2032 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2033 2034 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2035 const char *name, const char *sig)) 2036 JNIWrapper("GetFieldID"); 2037 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2038 jfieldID ret = 0; 2039 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2040 2041 // The class should have been loaded (we have an instance of the class 2042 // passed in) so the field and signature should already be in the symbol 2043 // table. If they're not there, the field doesn't exist. 2044 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2045 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2046 if (fieldname == NULL || signame == NULL) { 2047 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2048 } 2049 KlassHandle k(THREAD, 2050 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2051 // Make sure class is initialized before handing id's out to fields 2052 k()->initialize(CHECK_NULL); 2053 2054 fieldDescriptor fd; 2055 if (!k()->oop_is_instance() || 2056 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2057 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2058 } 2059 2060 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2061 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2062 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2063 return ret; 2064 JNI_END 2065 2066 2067 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2068 JNIWrapper("GetObjectField"); 2069 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2070 oop o = JNIHandles::resolve_non_null(obj); 2071 Klass* k = o->klass(); 2072 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2073 // Keep JVMTI addition small and only check enabled flag here. 2074 // jni_GetField_probe() assumes that is okay to create handles. 2075 if (JvmtiExport::should_post_field_access()) { 2076 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2077 } 2078 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2079 #if INCLUDE_ALL_GCS 2080 // If G1 is enabled and we are accessing the value of the referent 2081 // field in a reference object then we need to register a non-null 2082 // referent with the SATB barrier. 2083 if (UseG1GC) { 2084 bool needs_barrier = false; 2085 2086 if (ret != NULL && 2087 offset == java_lang_ref_Reference::referent_offset && 2088 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2089 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2090 needs_barrier = true; 2091 } 2092 2093 if (needs_barrier) { 2094 oop referent = JNIHandles::resolve(ret); 2095 G1SATBCardTableModRefBS::enqueue(referent); 2096 } 2097 } 2098 #endif // INCLUDE_ALL_GCS 2099 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2100 return ret; 2101 JNI_END 2102 2103 2104 2105 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2106 , EntryProbe, ReturnProbe) \ 2107 \ 2108 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2109 , ReturnProbe); \ 2110 \ 2111 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2112 JNIWrapper("Get" XSTR(Result) "Field"); \ 2113 \ 2114 EntryProbe; \ 2115 Return ret = 0;\ 2116 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2117 \ 2118 oop o = JNIHandles::resolve_non_null(obj); \ 2119 Klass* k = o->klass(); \ 2120 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2121 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2122 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2123 /* and creates a ResetNoHandleMark. */ \ 2124 if (JvmtiExport::should_post_field_access()) { \ 2125 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2126 } \ 2127 ret = o->Fieldname##_field(offset); \ 2128 return ret; \ 2129 JNI_END 2130 2131 DEFINE_GETFIELD(jboolean, bool, Boolean 2132 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2133 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2134 DEFINE_GETFIELD(jbyte, byte, Byte 2135 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2137 DEFINE_GETFIELD(jchar, char, Char 2138 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2139 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2140 DEFINE_GETFIELD(jshort, short, Short 2141 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2142 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2143 DEFINE_GETFIELD(jint, int, Int 2144 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2145 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2146 DEFINE_GETFIELD(jlong, long, Long 2147 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2148 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2149 // Float and double probes don't return value because dtrace doesn't currently support it 2150 DEFINE_GETFIELD(jfloat, float, Float 2151 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2152 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2153 DEFINE_GETFIELD(jdouble, double, Double 2154 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2155 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2156 2157 address jni_GetBooleanField_addr() { 2158 return (address)jni_GetBooleanField; 2159 } 2160 address jni_GetByteField_addr() { 2161 return (address)jni_GetByteField; 2162 } 2163 address jni_GetCharField_addr() { 2164 return (address)jni_GetCharField; 2165 } 2166 address jni_GetShortField_addr() { 2167 return (address)jni_GetShortField; 2168 } 2169 address jni_GetIntField_addr() { 2170 return (address)jni_GetIntField; 2171 } 2172 address jni_GetLongField_addr() { 2173 return (address)jni_GetLongField; 2174 } 2175 address jni_GetFloatField_addr() { 2176 return (address)jni_GetFloatField; 2177 } 2178 address jni_GetDoubleField_addr() { 2179 return (address)jni_GetDoubleField; 2180 } 2181 2182 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2183 JNIWrapper("SetObjectField"); 2184 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 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.l = value; 2194 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2195 } 2196 o->obj_field_put(offset, JNIHandles::resolve(value)); 2197 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2198 JNI_END 2199 2200 2201 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2202 , EntryProbe, ReturnProbe) \ 2203 \ 2204 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2205 JNIWrapper("Set" XSTR(Result) "Field"); \ 2206 \ 2207 EntryProbe; \ 2208 \ 2209 oop o = JNIHandles::resolve_non_null(obj); \ 2210 Klass* k = o->klass(); \ 2211 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2212 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2213 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2214 /* and creates a ResetNoHandleMark. */ \ 2215 if (JvmtiExport::should_post_field_modification()) { \ 2216 jvalue field_value; \ 2217 field_value.unionType = value; \ 2218 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2219 } \ 2220 o->Fieldname##_field_put(offset, value); \ 2221 ReturnProbe; \ 2222 JNI_END 2223 2224 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2225 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2226 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2227 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2228 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2229 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2230 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2231 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2232 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2233 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2234 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2235 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2236 DEFINE_SETFIELD(jint, int, Int, 'I', i 2237 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2238 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2239 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2240 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2241 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2242 // Float and double probes don't return value because dtrace doesn't currently support it 2243 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2244 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2245 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2246 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2247 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2248 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2249 2250 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2251 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2252 2253 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2254 JNIWrapper("ToReflectedField"); 2255 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2256 jobject ret = NULL; 2257 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2258 2259 fieldDescriptor fd; 2260 bool found = false; 2261 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2262 2263 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2264 2265 if (isStatic) { 2266 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2267 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2268 assert(id->is_static_field_id(), "invalid static field id"); 2269 found = id->find_local_field(&fd); 2270 } else { 2271 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2272 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2273 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2274 } 2275 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2276 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2277 ret = JNIHandles::make_local(env, reflected); 2278 return ret; 2279 JNI_END 2280 2281 2282 // 2283 // Accessing Static Fields 2284 // 2285 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2286 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2287 2288 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2289 const char *name, const char *sig)) 2290 JNIWrapper("GetStaticFieldID"); 2291 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2292 jfieldID ret = NULL; 2293 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2294 2295 // The class should have been loaded (we have an instance of the class 2296 // passed in) so the field and signature should already be in the symbol 2297 // table. If they're not there, the field doesn't exist. 2298 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2299 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2300 if (fieldname == NULL || signame == NULL) { 2301 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2302 } 2303 KlassHandle k(THREAD, 2304 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2305 // Make sure class is initialized before handing id's out to static fields 2306 k()->initialize(CHECK_NULL); 2307 2308 fieldDescriptor fd; 2309 if (!k()->oop_is_instance() || 2310 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2311 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2312 } 2313 2314 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2315 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2316 debug_only(id->set_is_static_field_id();) 2317 2318 debug_only(id->verify(fd.field_holder())); 2319 2320 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2321 return ret; 2322 JNI_END 2323 2324 2325 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2326 JNIWrapper("GetStaticObjectField"); 2327 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2328 #if INCLUDE_JNI_CHECK 2329 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2330 #endif // INCLUDE_JNI_CHECK 2331 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2332 assert(id->is_static_field_id(), "invalid static field id"); 2333 // Keep JVMTI addition small and only check enabled flag here. 2334 // jni_GetField_probe() assumes that is okay to create handles. 2335 if (JvmtiExport::should_post_field_access()) { 2336 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2337 } 2338 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2339 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2340 return ret; 2341 JNI_END 2342 2343 2344 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2345 , EntryProbe, ReturnProbe) \ 2346 \ 2347 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2348 , ReturnProbe); \ 2349 \ 2350 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2351 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2352 EntryProbe; \ 2353 Return ret = 0;\ 2354 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2355 (const Return&)ret);\ 2356 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2357 assert(id->is_static_field_id(), "invalid static field id"); \ 2358 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2359 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2360 if (JvmtiExport::should_post_field_access()) { \ 2361 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2362 } \ 2363 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2364 return ret;\ 2365 JNI_END 2366 2367 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2368 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2369 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2370 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2371 DEFINE_GETSTATICFIELD(jchar, char, Char 2372 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2373 DEFINE_GETSTATICFIELD(jshort, short, Short 2374 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2375 DEFINE_GETSTATICFIELD(jint, int, Int 2376 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2377 DEFINE_GETSTATICFIELD(jlong, long, Long 2378 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2379 // Float and double probes don't return value because dtrace doesn't currently support it 2380 DEFINE_GETSTATICFIELD(jfloat, float, Float 2381 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2382 DEFINE_GETSTATICFIELD(jdouble, double, Double 2383 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2384 2385 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2386 JNIWrapper("SetStaticObjectField"); 2387 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2388 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2389 assert(id->is_static_field_id(), "invalid static field id"); 2390 // Keep JVMTI addition small and only check enabled flag here. 2391 // jni_SetField_probe() assumes that is okay to create handles. 2392 if (JvmtiExport::should_post_field_modification()) { 2393 jvalue field_value; 2394 field_value.l = value; 2395 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2396 } 2397 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2398 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2399 JNI_END 2400 2401 2402 2403 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2404 , EntryProbe, ReturnProbe) \ 2405 \ 2406 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2407 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2408 EntryProbe; \ 2409 \ 2410 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2411 assert(id->is_static_field_id(), "invalid static field id"); \ 2412 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2413 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2414 if (JvmtiExport::should_post_field_modification()) { \ 2415 jvalue field_value; \ 2416 field_value.unionType = value; \ 2417 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2418 } \ 2419 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2420 ReturnProbe;\ 2421 JNI_END 2422 2423 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2424 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2425 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2426 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2427 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2428 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2429 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2430 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2431 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2432 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2433 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2434 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2435 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2436 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2437 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2438 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2439 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2440 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2441 // Float and double probes don't return value because dtrace doesn't currently support it 2442 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2443 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2444 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2445 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2446 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2447 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2448 2449 // 2450 // String Operations 2451 // 2452 2453 // Unicode Interface 2454 2455 DT_RETURN_MARK_DECL(NewString, jstring 2456 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2457 2458 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2459 JNIWrapper("NewString"); 2460 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2461 jstring ret = NULL; 2462 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2463 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2464 ret = (jstring) JNIHandles::make_local(env, string); 2465 return ret; 2466 JNI_END 2467 2468 2469 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2470 JNIWrapper("GetStringLength"); 2471 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2472 jsize ret = 0; 2473 oop s = JNIHandles::resolve_non_null(string); 2474 if (java_lang_String::value(s) != NULL) { 2475 ret = java_lang_String::length(s); 2476 } 2477 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2478 return ret; 2479 JNI_END 2480 2481 2482 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2483 JNIEnv *env, jstring string, jboolean *isCopy)) 2484 JNIWrapper("GetStringChars"); 2485 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2486 jchar* buf = NULL; 2487 oop s = JNIHandles::resolve_non_null(string); 2488 typeArrayOop s_value = java_lang_String::value(s); 2489 if (s_value != NULL) { 2490 int s_len = java_lang_String::length(s); 2491 int s_offset = java_lang_String::offset(s); 2492 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2493 /* JNI Specification states return NULL on OOM */ 2494 if (buf != NULL) { 2495 if (s_len > 0) { 2496 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); 2497 } 2498 buf[s_len] = 0; 2499 //%note jni_5 2500 if (isCopy != NULL) { 2501 *isCopy = JNI_TRUE; 2502 } 2503 } 2504 } 2505 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2506 return buf; 2507 JNI_END 2508 2509 2510 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2511 JNIWrapper("ReleaseStringChars"); 2512 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2513 //%note jni_6 2514 if (chars != NULL) { 2515 // Since String objects are supposed to be immutable, don't copy any 2516 // new data back. A bad user will have to go after the char array. 2517 FreeHeap((void*) chars); 2518 } 2519 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2520 JNI_END 2521 2522 2523 // UTF Interface 2524 2525 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2526 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2527 2528 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2529 JNIWrapper("NewStringUTF"); 2530 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2531 jstring ret; 2532 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2533 2534 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2535 ret = (jstring) JNIHandles::make_local(env, result); 2536 return ret; 2537 JNI_END 2538 2539 2540 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2541 JNIWrapper("GetStringUTFLength"); 2542 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2543 jsize ret = 0; 2544 oop java_string = JNIHandles::resolve_non_null(string); 2545 if (java_lang_String::value(java_string) != NULL) { 2546 ret = java_lang_String::utf8_length(java_string); 2547 } 2548 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2549 return ret; 2550 JNI_END 2551 2552 2553 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2554 JNIWrapper("GetStringUTFChars"); 2555 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2556 char* result = NULL; 2557 oop java_string = JNIHandles::resolve_non_null(string); 2558 if (java_lang_String::value(java_string) != NULL) { 2559 size_t length = java_lang_String::utf8_length(java_string); 2560 /* JNI Specification states return NULL on OOM */ 2561 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2562 if (result != NULL) { 2563 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2564 if (isCopy != NULL) { 2565 *isCopy = JNI_TRUE; 2566 } 2567 } 2568 } 2569 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2570 return result; 2571 JNI_END 2572 2573 2574 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2575 JNIWrapper("ReleaseStringUTFChars"); 2576 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2577 if (chars != NULL) { 2578 FreeHeap((char*) chars); 2579 } 2580 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2581 JNI_END 2582 2583 2584 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2585 JNIWrapper("GetArrayLength"); 2586 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2587 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2588 assert(a->is_array(), "must be array"); 2589 jsize ret = a->length(); 2590 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2591 return ret; 2592 JNI_END 2593 2594 2595 // 2596 // Object Array Operations 2597 // 2598 2599 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2600 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2601 2602 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2603 JNIWrapper("NewObjectArray"); 2604 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2605 jobjectArray ret = NULL; 2606 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2607 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2608 Klass* ako = ek()->array_klass(CHECK_NULL); 2609 KlassHandle ak = KlassHandle(THREAD, ako); 2610 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2611 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2612 oop initial_value = JNIHandles::resolve(initialElement); 2613 if (initial_value != NULL) { // array already initialized with NULL 2614 for (int index = 0; index < length; index++) { 2615 result->obj_at_put(index, initial_value); 2616 } 2617 } 2618 ret = (jobjectArray) JNIHandles::make_local(env, result); 2619 return ret; 2620 JNI_END 2621 2622 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2623 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2624 2625 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2626 JNIWrapper("GetObjectArrayElement"); 2627 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2628 jobject ret = NULL; 2629 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2630 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2631 if (a->is_within_bounds(index)) { 2632 ret = JNIHandles::make_local(env, a->obj_at(index)); 2633 return ret; 2634 } else { 2635 char buf[jintAsStringSize]; 2636 sprintf(buf, "%d", index); 2637 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2638 } 2639 JNI_END 2640 2641 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2642 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2643 2644 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2645 JNIWrapper("SetObjectArrayElement"); 2646 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2647 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2648 2649 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2650 oop v = JNIHandles::resolve(value); 2651 if (a->is_within_bounds(index)) { 2652 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2653 a->obj_at_put(index, v); 2654 } else { 2655 THROW(vmSymbols::java_lang_ArrayStoreException()); 2656 } 2657 } else { 2658 char buf[jintAsStringSize]; 2659 sprintf(buf, "%d", index); 2660 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2661 } 2662 JNI_END 2663 2664 2665 2666 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2667 ,EntryProbe,ReturnProbe) \ 2668 \ 2669 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2670 , ReturnProbe); \ 2671 \ 2672 JNI_ENTRY(Return, \ 2673 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2674 JNIWrapper("New" XSTR(Result) "Array"); \ 2675 EntryProbe; \ 2676 Return ret = NULL;\ 2677 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2678 \ 2679 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2680 ret = (Return) JNIHandles::make_local(env, obj); \ 2681 return ret;\ 2682 JNI_END 2683 2684 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2685 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2686 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2687 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2688 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2689 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2690 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2691 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2692 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2693 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2694 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2695 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2696 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2697 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2698 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2699 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2700 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2701 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2702 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2703 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2704 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2705 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2706 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2707 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2708 2709 // Return an address which will fault if the caller writes to it. 2710 2711 static char* get_bad_address() { 2712 static char* bad_address = NULL; 2713 if (bad_address == NULL) { 2714 size_t size = os::vm_allocation_granularity(); 2715 bad_address = os::reserve_memory(size); 2716 if (bad_address != NULL) { 2717 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2718 /*is_committed*/false); 2719 } 2720 } 2721 return bad_address; 2722 } 2723 2724 2725 2726 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2727 , EntryProbe, ReturnProbe) \ 2728 \ 2729 JNI_QUICK_ENTRY(ElementType*, \ 2730 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2731 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2732 EntryProbe; \ 2733 /* allocate an chunk of memory in c land */ \ 2734 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2735 ElementType* result; \ 2736 int len = a->length(); \ 2737 if (len == 0) { \ 2738 /* Empty array: legal but useless, can't return NULL. \ 2739 * Return a pointer to something useless. \ 2740 * Avoid asserts in typeArrayOop. */ \ 2741 result = (ElementType*)get_bad_address(); \ 2742 } else { \ 2743 /* JNI Specification states return NULL on OOM */ \ 2744 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2745 if (result != NULL) { \ 2746 /* copy the array to the c chunk */ \ 2747 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2748 if (isCopy) { \ 2749 *isCopy = JNI_TRUE; \ 2750 } \ 2751 } \ 2752 } \ 2753 ReturnProbe; \ 2754 return result; \ 2755 JNI_END 2756 2757 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2758 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2760 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2761 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2762 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2763 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2764 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2765 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2766 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2767 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2768 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2769 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2770 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2771 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2772 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2773 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2774 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2775 // Float and double probes don't return value because dtrace doesn't currently support it 2776 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2777 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2778 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2779 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2780 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2781 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2782 2783 2784 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2785 , EntryProbe, ReturnProbe);\ 2786 \ 2787 JNI_QUICK_ENTRY(void, \ 2788 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2789 ElementType *buf, jint mode)) \ 2790 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2791 EntryProbe; \ 2792 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2793 int len = a->length(); \ 2794 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2795 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2796 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2797 } \ 2798 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2799 FreeHeap(buf); \ 2800 } \ 2801 } \ 2802 ReturnProbe; \ 2803 JNI_END 2804 2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2806 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2807 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2809 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2810 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2812 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2813 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2815 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2816 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2818 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2819 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2820 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2821 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2822 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2823 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2824 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2825 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2826 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2827 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2828 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2829 2830 2831 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2832 , EntryProbe, ReturnProbe); \ 2833 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2834 , ReturnProbe); \ 2835 \ 2836 JNI_ENTRY(void, \ 2837 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2838 jsize len, ElementType *buf)) \ 2839 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2840 EntryProbe; \ 2841 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2842 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2843 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2844 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2845 } else { \ 2846 if (len > 0) { \ 2847 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2848 memcpy((u_char*) buf, \ 2849 (u_char*) src->Tag##_at_addr(start), \ 2850 len << sc); \ 2851 } \ 2852 } \ 2853 JNI_END 2854 2855 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2856 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2857 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2858 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2859 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2860 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2861 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2862 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2863 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2864 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2865 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2866 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2867 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2868 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2869 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2870 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2871 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2872 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2873 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2874 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2875 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2876 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2877 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2878 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2879 2880 2881 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2882 , EntryProbe, ReturnProbe); \ 2883 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2884 ,ReturnProbe); \ 2885 \ 2886 JNI_ENTRY(void, \ 2887 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2888 jsize len, const ElementType *buf)) \ 2889 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2890 EntryProbe; \ 2891 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2892 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2893 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2894 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2895 } else { \ 2896 if (len > 0) { \ 2897 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2898 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2899 (u_char*) buf, \ 2900 len << sc); \ 2901 } \ 2902 } \ 2903 JNI_END 2904 2905 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2906 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2907 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2908 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2909 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2910 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2911 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2912 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2913 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2914 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2915 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2916 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2917 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2918 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2919 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2920 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2921 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2922 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2923 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2924 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2925 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2926 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2927 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2928 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2929 2930 2931 // 2932 // Interception of natives 2933 // 2934 2935 // The RegisterNatives call being attempted tried to register with a method that 2936 // is not native. Ask JVM TI what prefixes have been specified. Then check 2937 // to see if the native method is now wrapped with the prefixes. See the 2938 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2939 static Method* find_prefixed_native(KlassHandle k, 2940 Symbol* name, Symbol* signature, TRAPS) { 2941 #if INCLUDE_JVMTI 2942 ResourceMark rm(THREAD); 2943 Method* method; 2944 int name_len = name->utf8_length(); 2945 char* name_str = name->as_utf8(); 2946 int prefix_count; 2947 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2948 for (int i = 0; i < prefix_count; i++) { 2949 char* prefix = prefixes[i]; 2950 int prefix_len = (int)strlen(prefix); 2951 2952 // try adding this prefix to the method name and see if it matches another method name 2953 int trial_len = name_len + prefix_len; 2954 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2955 strcpy(trial_name_str, prefix); 2956 strcat(trial_name_str, name_str); 2957 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2958 if (trial_name == NULL) { 2959 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2960 } 2961 method = k()->lookup_method(trial_name, signature); 2962 if (method == NULL) { 2963 continue; // signature doesn't match, try the next prefix 2964 } 2965 if (method->is_native()) { 2966 method->set_is_prefixed_native(); 2967 return method; // wahoo, we found a prefixed version of the method, return it 2968 } 2969 // found as non-native, so prefix is good, add it, probably just need more prefixes 2970 name_len = trial_len; 2971 name_str = trial_name_str; 2972 } 2973 #endif // INCLUDE_JVMTI 2974 return NULL; // not found 2975 } 2976 2977 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2978 Method* method = k()->lookup_method(name, signature); 2979 if (method == NULL) { 2980 ResourceMark rm; 2981 stringStream st; 2982 st.print("Method %s name or signature does not match", 2983 Method::name_and_sig_as_C_string(k(), name, signature)); 2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2985 } 2986 if (!method->is_native()) { 2987 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2988 method = find_prefixed_native(k, name, signature, THREAD); 2989 if (method == NULL) { 2990 ResourceMark rm; 2991 stringStream st; 2992 st.print("Method %s is not declared as native", 2993 Method::name_and_sig_as_C_string(k(), name, signature)); 2994 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2995 } 2996 } 2997 2998 if (entry != NULL) { 2999 method->set_native_function(entry, 3000 Method::native_bind_event_is_interesting); 3001 } else { 3002 method->clear_native_function(); 3003 } 3004 if (PrintJNIResolving) { 3005 ResourceMark rm(THREAD); 3006 tty->print_cr("[Registering JNI native method %s.%s]", 3007 method->method_holder()->external_name(), 3008 method->name()->as_C_string()); 3009 } 3010 return true; 3011 } 3012 3013 DT_RETURN_MARK_DECL(RegisterNatives, jint 3014 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3015 3016 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3017 const JNINativeMethod *methods, 3018 jint nMethods)) 3019 JNIWrapper("RegisterNatives"); 3020 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3021 jint ret = 0; 3022 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3023 3024 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3025 3026 for (int index = 0; index < nMethods; index++) { 3027 const char* meth_name = methods[index].name; 3028 const char* meth_sig = methods[index].signature; 3029 int meth_name_len = (int)strlen(meth_name); 3030 3031 // The class should have been loaded (we have an instance of the class 3032 // passed in) so the method and signature should already be in the symbol 3033 // table. If they're not there, the method doesn't exist. 3034 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3035 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3036 3037 if (name == NULL || signature == NULL) { 3038 ResourceMark rm; 3039 stringStream st; 3040 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3041 // Must return negative value on failure 3042 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3043 } 3044 3045 bool res = register_native(h_k, name, signature, 3046 (address) methods[index].fnPtr, THREAD); 3047 if (!res) { 3048 ret = -1; 3049 break; 3050 } 3051 } 3052 return ret; 3053 JNI_END 3054 3055 3056 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3057 JNIWrapper("UnregisterNatives"); 3058 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3059 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3060 //%note jni_2 3061 if (k->oop_is_instance()) { 3062 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3063 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3064 if (m->is_native()) { 3065 m->clear_native_function(); 3066 m->set_signature_handler(NULL); 3067 } 3068 } 3069 } 3070 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3071 return 0; 3072 JNI_END 3073 3074 // 3075 // Monitor functions 3076 // 3077 3078 DT_RETURN_MARK_DECL(MonitorEnter, jint 3079 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3080 3081 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3082 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3083 jint ret = JNI_ERR; 3084 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3085 3086 // If the object is null, we can't do anything with it 3087 if (jobj == NULL) { 3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3089 } 3090 3091 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3092 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3093 ret = JNI_OK; 3094 return ret; 3095 JNI_END 3096 3097 DT_RETURN_MARK_DECL(MonitorExit, jint 3098 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3099 3100 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3101 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3102 jint ret = JNI_ERR; 3103 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3104 3105 // Don't do anything with a null object 3106 if (jobj == NULL) { 3107 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3108 } 3109 3110 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3111 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3112 3113 ret = JNI_OK; 3114 return ret; 3115 JNI_END 3116 3117 // 3118 // Extensions 3119 // 3120 3121 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3122 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3123 3124 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3125 JNIWrapper("GetStringRegion"); 3126 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3127 DT_VOID_RETURN_MARK(GetStringRegion); 3128 oop s = JNIHandles::resolve_non_null(string); 3129 int s_len = java_lang_String::length(s); 3130 if (start < 0 || len < 0 || start + len > s_len) { 3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3132 } else { 3133 if (len > 0) { 3134 int s_offset = java_lang_String::offset(s); 3135 typeArrayOop s_value = java_lang_String::value(s); 3136 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); 3137 } 3138 } 3139 JNI_END 3140 3141 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3142 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3143 3144 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3145 JNIWrapper("GetStringUTFRegion"); 3146 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3147 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3148 oop s = JNIHandles::resolve_non_null(string); 3149 int s_len = java_lang_String::length(s); 3150 if (start < 0 || len < 0 || start + len > s_len) { 3151 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3152 } else { 3153 //%note jni_7 3154 if (len > 0) { 3155 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3156 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3157 // as_utf8_string null-terminates the result string 3158 } else { 3159 // JDK null-terminates the buffer even in len is zero 3160 if (buf != NULL) { 3161 buf[0] = 0; 3162 } 3163 } 3164 } 3165 JNI_END 3166 3167 3168 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3169 JNIWrapper("GetPrimitiveArrayCritical"); 3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3171 GC_locker::lock_critical(thread); 3172 if (isCopy != NULL) { 3173 *isCopy = JNI_FALSE; 3174 } 3175 oop a = JNIHandles::resolve_non_null(array); 3176 assert(a->is_array(), "just checking"); 3177 BasicType type; 3178 if (a->is_objArray()) { 3179 type = T_OBJECT; 3180 } else { 3181 type = TypeArrayKlass::cast(a->klass())->element_type(); 3182 } 3183 void* ret = arrayOop(a)->base(type); 3184 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3185 return ret; 3186 JNI_END 3187 3188 3189 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3190 JNIWrapper("ReleasePrimitiveArrayCritical"); 3191 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3192 // The array, carray and mode arguments are ignored 3193 GC_locker::unlock_critical(thread); 3194 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3195 JNI_END 3196 3197 3198 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3199 JNIWrapper("GetStringCritical"); 3200 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3201 GC_locker::lock_critical(thread); 3202 if (isCopy != NULL) { 3203 *isCopy = JNI_FALSE; 3204 } 3205 oop s = JNIHandles::resolve_non_null(string); 3206 int s_len = java_lang_String::length(s); 3207 typeArrayOop s_value = java_lang_String::value(s); 3208 int s_offset = java_lang_String::offset(s); 3209 const jchar* ret; 3210 if (s_len > 0) { 3211 ret = s_value->char_at_addr(s_offset); 3212 } else { 3213 ret = (jchar*) s_value->base(T_CHAR); 3214 } 3215 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3216 return ret; 3217 JNI_END 3218 3219 3220 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3221 JNIWrapper("ReleaseStringCritical"); 3222 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3223 // The str and chars arguments are ignored 3224 GC_locker::unlock_critical(thread); 3225 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3226 JNI_END 3227 3228 3229 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3230 JNIWrapper("jni_NewWeakGlobalRef"); 3231 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3232 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3233 jweak ret = JNIHandles::make_weak_global(ref_handle); 3234 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3235 return ret; 3236 JNI_END 3237 3238 // Must be JNI_ENTRY (with HandleMark) 3239 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3240 JNIWrapper("jni_DeleteWeakGlobalRef"); 3241 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3242 JNIHandles::destroy_weak_global(ref); 3243 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3244 JNI_END 3245 3246 3247 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3248 JNIWrapper("jni_ExceptionCheck"); 3249 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3250 jni_check_async_exceptions(thread); 3251 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3252 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3253 return ret; 3254 JNI_END 3255 3256 3257 // Initialization state for three routines below relating to 3258 // java.nio.DirectBuffers 3259 static jint directBufferSupportInitializeStarted = 0; 3260 static volatile jint directBufferSupportInitializeEnded = 0; 3261 static volatile jint directBufferSupportInitializeFailed = 0; 3262 static jclass bufferClass = NULL; 3263 static jclass directBufferClass = NULL; 3264 static jclass directByteBufferClass = NULL; 3265 static jmethodID directByteBufferConstructor = NULL; 3266 static jfieldID directBufferAddressField = NULL; 3267 static jfieldID bufferCapacityField = NULL; 3268 3269 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3270 Handle loader; // null (bootstrap) loader 3271 Handle protection_domain; // null protection domain 3272 3273 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3274 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3275 3276 if (TraceClassResolution && result != NULL) { 3277 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3278 } 3279 return result; 3280 } 3281 3282 // These lookups are done with the NULL (bootstrap) ClassLoader to 3283 // circumvent any security checks that would be done by jni_FindClass. 3284 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3285 { 3286 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3287 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3288 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3289 return true; 3290 } 3291 JNI_END 3292 3293 3294 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3295 if (directBufferSupportInitializeFailed) { 3296 return false; 3297 } 3298 3299 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3300 if (!lookupDirectBufferClasses(env)) { 3301 directBufferSupportInitializeFailed = 1; 3302 return false; 3303 } 3304 3305 // Make global references for these 3306 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3307 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3308 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3309 3310 // Get needed field and method IDs 3311 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3312 if (env->ExceptionCheck()) { 3313 env->ExceptionClear(); 3314 directBufferSupportInitializeFailed = 1; 3315 return false; 3316 } 3317 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3318 if (env->ExceptionCheck()) { 3319 env->ExceptionClear(); 3320 directBufferSupportInitializeFailed = 1; 3321 return false; 3322 } 3323 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3324 if (env->ExceptionCheck()) { 3325 env->ExceptionClear(); 3326 directBufferSupportInitializeFailed = 1; 3327 return false; 3328 } 3329 3330 if ((directByteBufferConstructor == NULL) || 3331 (directBufferAddressField == NULL) || 3332 (bufferCapacityField == NULL)) { 3333 directBufferSupportInitializeFailed = 1; 3334 return false; 3335 } 3336 3337 directBufferSupportInitializeEnded = 1; 3338 } else { 3339 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3340 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls 3341 // os::sleep which requires the VM state transition. On other platforms, it 3342 // is not necessary. The following call to change the VM state is purposely 3343 // put inside the loop to avoid potential deadlock when multiple threads 3344 // try to call this method. See 6791815 for more details. 3345 ThreadInVMfromNative tivn(thread); 3346 os::yield_all(); 3347 } 3348 } 3349 3350 return !directBufferSupportInitializeFailed; 3351 } 3352 3353 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3354 { 3355 // thread_from_jni_environment() will block if VM is gone. 3356 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3357 3358 JNIWrapper("jni_NewDirectByteBuffer"); 3359 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3360 3361 if (!directBufferSupportInitializeEnded) { 3362 if (!initializeDirectBufferSupport(env, thread)) { 3363 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3364 return NULL; 3365 } 3366 } 3367 3368 // Being paranoid about accidental sign extension on address 3369 jlong addr = (jlong) ((uintptr_t) address); 3370 // NOTE that package-private DirectByteBuffer constructor currently 3371 // takes int capacity 3372 jint cap = (jint) capacity; 3373 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3375 return ret; 3376 } 3377 3378 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3379 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3380 3381 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3382 { 3383 // thread_from_jni_environment() will block if VM is gone. 3384 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3385 3386 JNIWrapper("jni_GetDirectBufferAddress"); 3387 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3388 void* ret = NULL; 3389 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3390 3391 if (!directBufferSupportInitializeEnded) { 3392 if (!initializeDirectBufferSupport(env, thread)) { 3393 return 0; 3394 } 3395 } 3396 3397 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3398 return 0; 3399 } 3400 3401 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3402 return ret; 3403 } 3404 3405 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3406 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3407 3408 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3409 { 3410 // thread_from_jni_environment() will block if VM is gone. 3411 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3412 3413 JNIWrapper("jni_GetDirectBufferCapacity"); 3414 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3415 jlong ret = -1; 3416 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3417 3418 if (!directBufferSupportInitializeEnded) { 3419 if (!initializeDirectBufferSupport(env, thread)) { 3420 ret = 0; 3421 return ret; 3422 } 3423 } 3424 3425 if (buf == NULL) { 3426 return -1; 3427 } 3428 3429 if (!env->IsInstanceOf(buf, directBufferClass)) { 3430 return -1; 3431 } 3432 3433 // NOTE that capacity is currently an int in the implementation 3434 ret = env->GetIntField(buf, bufferCapacityField); 3435 return ret; 3436 } 3437 3438 3439 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3440 JNIWrapper("GetVersion"); 3441 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3442 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3443 return CurrentVersion; 3444 JNI_END 3445 3446 extern struct JavaVM_ main_vm; 3447 3448 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3449 JNIWrapper("jni_GetJavaVM"); 3450 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3451 *vm = (JavaVM *)(&main_vm); 3452 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3453 return JNI_OK; 3454 JNI_END 3455 3456 // Structure containing all jni functions 3457 struct JNINativeInterface_ jni_NativeInterface = { 3458 NULL, 3459 NULL, 3460 NULL, 3461 3462 NULL, 3463 3464 jni_GetVersion, 3465 3466 jni_DefineClass, 3467 jni_FindClass, 3468 3469 jni_FromReflectedMethod, 3470 jni_FromReflectedField, 3471 3472 jni_ToReflectedMethod, 3473 3474 jni_GetSuperclass, 3475 jni_IsAssignableFrom, 3476 3477 jni_ToReflectedField, 3478 3479 jni_Throw, 3480 jni_ThrowNew, 3481 jni_ExceptionOccurred, 3482 jni_ExceptionDescribe, 3483 jni_ExceptionClear, 3484 jni_FatalError, 3485 3486 jni_PushLocalFrame, 3487 jni_PopLocalFrame, 3488 3489 jni_NewGlobalRef, 3490 jni_DeleteGlobalRef, 3491 jni_DeleteLocalRef, 3492 jni_IsSameObject, 3493 3494 jni_NewLocalRef, 3495 jni_EnsureLocalCapacity, 3496 3497 jni_AllocObject, 3498 jni_NewObject, 3499 jni_NewObjectV, 3500 jni_NewObjectA, 3501 3502 jni_GetObjectClass, 3503 jni_IsInstanceOf, 3504 3505 jni_GetMethodID, 3506 3507 jni_CallObjectMethod, 3508 jni_CallObjectMethodV, 3509 jni_CallObjectMethodA, 3510 jni_CallBooleanMethod, 3511 jni_CallBooleanMethodV, 3512 jni_CallBooleanMethodA, 3513 jni_CallByteMethod, 3514 jni_CallByteMethodV, 3515 jni_CallByteMethodA, 3516 jni_CallCharMethod, 3517 jni_CallCharMethodV, 3518 jni_CallCharMethodA, 3519 jni_CallShortMethod, 3520 jni_CallShortMethodV, 3521 jni_CallShortMethodA, 3522 jni_CallIntMethod, 3523 jni_CallIntMethodV, 3524 jni_CallIntMethodA, 3525 jni_CallLongMethod, 3526 jni_CallLongMethodV, 3527 jni_CallLongMethodA, 3528 jni_CallFloatMethod, 3529 jni_CallFloatMethodV, 3530 jni_CallFloatMethodA, 3531 jni_CallDoubleMethod, 3532 jni_CallDoubleMethodV, 3533 jni_CallDoubleMethodA, 3534 jni_CallVoidMethod, 3535 jni_CallVoidMethodV, 3536 jni_CallVoidMethodA, 3537 3538 jni_CallNonvirtualObjectMethod, 3539 jni_CallNonvirtualObjectMethodV, 3540 jni_CallNonvirtualObjectMethodA, 3541 jni_CallNonvirtualBooleanMethod, 3542 jni_CallNonvirtualBooleanMethodV, 3543 jni_CallNonvirtualBooleanMethodA, 3544 jni_CallNonvirtualByteMethod, 3545 jni_CallNonvirtualByteMethodV, 3546 jni_CallNonvirtualByteMethodA, 3547 jni_CallNonvirtualCharMethod, 3548 jni_CallNonvirtualCharMethodV, 3549 jni_CallNonvirtualCharMethodA, 3550 jni_CallNonvirtualShortMethod, 3551 jni_CallNonvirtualShortMethodV, 3552 jni_CallNonvirtualShortMethodA, 3553 jni_CallNonvirtualIntMethod, 3554 jni_CallNonvirtualIntMethodV, 3555 jni_CallNonvirtualIntMethodA, 3556 jni_CallNonvirtualLongMethod, 3557 jni_CallNonvirtualLongMethodV, 3558 jni_CallNonvirtualLongMethodA, 3559 jni_CallNonvirtualFloatMethod, 3560 jni_CallNonvirtualFloatMethodV, 3561 jni_CallNonvirtualFloatMethodA, 3562 jni_CallNonvirtualDoubleMethod, 3563 jni_CallNonvirtualDoubleMethodV, 3564 jni_CallNonvirtualDoubleMethodA, 3565 jni_CallNonvirtualVoidMethod, 3566 jni_CallNonvirtualVoidMethodV, 3567 jni_CallNonvirtualVoidMethodA, 3568 3569 jni_GetFieldID, 3570 3571 jni_GetObjectField, 3572 jni_GetBooleanField, 3573 jni_GetByteField, 3574 jni_GetCharField, 3575 jni_GetShortField, 3576 jni_GetIntField, 3577 jni_GetLongField, 3578 jni_GetFloatField, 3579 jni_GetDoubleField, 3580 3581 jni_SetObjectField, 3582 jni_SetBooleanField, 3583 jni_SetByteField, 3584 jni_SetCharField, 3585 jni_SetShortField, 3586 jni_SetIntField, 3587 jni_SetLongField, 3588 jni_SetFloatField, 3589 jni_SetDoubleField, 3590 3591 jni_GetStaticMethodID, 3592 3593 jni_CallStaticObjectMethod, 3594 jni_CallStaticObjectMethodV, 3595 jni_CallStaticObjectMethodA, 3596 jni_CallStaticBooleanMethod, 3597 jni_CallStaticBooleanMethodV, 3598 jni_CallStaticBooleanMethodA, 3599 jni_CallStaticByteMethod, 3600 jni_CallStaticByteMethodV, 3601 jni_CallStaticByteMethodA, 3602 jni_CallStaticCharMethod, 3603 jni_CallStaticCharMethodV, 3604 jni_CallStaticCharMethodA, 3605 jni_CallStaticShortMethod, 3606 jni_CallStaticShortMethodV, 3607 jni_CallStaticShortMethodA, 3608 jni_CallStaticIntMethod, 3609 jni_CallStaticIntMethodV, 3610 jni_CallStaticIntMethodA, 3611 jni_CallStaticLongMethod, 3612 jni_CallStaticLongMethodV, 3613 jni_CallStaticLongMethodA, 3614 jni_CallStaticFloatMethod, 3615 jni_CallStaticFloatMethodV, 3616 jni_CallStaticFloatMethodA, 3617 jni_CallStaticDoubleMethod, 3618 jni_CallStaticDoubleMethodV, 3619 jni_CallStaticDoubleMethodA, 3620 jni_CallStaticVoidMethod, 3621 jni_CallStaticVoidMethodV, 3622 jni_CallStaticVoidMethodA, 3623 3624 jni_GetStaticFieldID, 3625 3626 jni_GetStaticObjectField, 3627 jni_GetStaticBooleanField, 3628 jni_GetStaticByteField, 3629 jni_GetStaticCharField, 3630 jni_GetStaticShortField, 3631 jni_GetStaticIntField, 3632 jni_GetStaticLongField, 3633 jni_GetStaticFloatField, 3634 jni_GetStaticDoubleField, 3635 3636 jni_SetStaticObjectField, 3637 jni_SetStaticBooleanField, 3638 jni_SetStaticByteField, 3639 jni_SetStaticCharField, 3640 jni_SetStaticShortField, 3641 jni_SetStaticIntField, 3642 jni_SetStaticLongField, 3643 jni_SetStaticFloatField, 3644 jni_SetStaticDoubleField, 3645 3646 jni_NewString, 3647 jni_GetStringLength, 3648 jni_GetStringChars, 3649 jni_ReleaseStringChars, 3650 3651 jni_NewStringUTF, 3652 jni_GetStringUTFLength, 3653 jni_GetStringUTFChars, 3654 jni_ReleaseStringUTFChars, 3655 3656 jni_GetArrayLength, 3657 3658 jni_NewObjectArray, 3659 jni_GetObjectArrayElement, 3660 jni_SetObjectArrayElement, 3661 3662 jni_NewBooleanArray, 3663 jni_NewByteArray, 3664 jni_NewCharArray, 3665 jni_NewShortArray, 3666 jni_NewIntArray, 3667 jni_NewLongArray, 3668 jni_NewFloatArray, 3669 jni_NewDoubleArray, 3670 3671 jni_GetBooleanArrayElements, 3672 jni_GetByteArrayElements, 3673 jni_GetCharArrayElements, 3674 jni_GetShortArrayElements, 3675 jni_GetIntArrayElements, 3676 jni_GetLongArrayElements, 3677 jni_GetFloatArrayElements, 3678 jni_GetDoubleArrayElements, 3679 3680 jni_ReleaseBooleanArrayElements, 3681 jni_ReleaseByteArrayElements, 3682 jni_ReleaseCharArrayElements, 3683 jni_ReleaseShortArrayElements, 3684 jni_ReleaseIntArrayElements, 3685 jni_ReleaseLongArrayElements, 3686 jni_ReleaseFloatArrayElements, 3687 jni_ReleaseDoubleArrayElements, 3688 3689 jni_GetBooleanArrayRegion, 3690 jni_GetByteArrayRegion, 3691 jni_GetCharArrayRegion, 3692 jni_GetShortArrayRegion, 3693 jni_GetIntArrayRegion, 3694 jni_GetLongArrayRegion, 3695 jni_GetFloatArrayRegion, 3696 jni_GetDoubleArrayRegion, 3697 3698 jni_SetBooleanArrayRegion, 3699 jni_SetByteArrayRegion, 3700 jni_SetCharArrayRegion, 3701 jni_SetShortArrayRegion, 3702 jni_SetIntArrayRegion, 3703 jni_SetLongArrayRegion, 3704 jni_SetFloatArrayRegion, 3705 jni_SetDoubleArrayRegion, 3706 3707 jni_RegisterNatives, 3708 jni_UnregisterNatives, 3709 3710 jni_MonitorEnter, 3711 jni_MonitorExit, 3712 3713 jni_GetJavaVM, 3714 3715 jni_GetStringRegion, 3716 jni_GetStringUTFRegion, 3717 3718 jni_GetPrimitiveArrayCritical, 3719 jni_ReleasePrimitiveArrayCritical, 3720 3721 jni_GetStringCritical, 3722 jni_ReleaseStringCritical, 3723 3724 jni_NewWeakGlobalRef, 3725 jni_DeleteWeakGlobalRef, 3726 3727 jni_ExceptionCheck, 3728 3729 jni_NewDirectByteBuffer, 3730 jni_GetDirectBufferAddress, 3731 jni_GetDirectBufferCapacity, 3732 3733 // New 1_6 features 3734 3735 jni_GetObjectRefType 3736 }; 3737 3738 3739 // For jvmti use to modify jni function table. 3740 // Java threads in native contiues to run until it is transitioned 3741 // to VM at safepoint. Before the transition or before it is blocked 3742 // for safepoint it may access jni function table. VM could crash if 3743 // any java thread access the jni function table in the middle of memcpy. 3744 // To avoid this each function pointers are copied automically. 3745 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3746 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3747 intptr_t *a = (intptr_t *) jni_functions(); 3748 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3749 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3750 Atomic::store_ptr(*b++, a++); 3751 } 3752 } 3753 3754 void quicken_jni_functions() { 3755 // Replace Get<Primitive>Field with fast versions 3756 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3757 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls 3758 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3759 // windows x86 currently needs SEH wrapper and the gain of the fast 3760 // versions currently isn't certain for server vm on uniprocessor. 3761 && os::is_MP() 3762 #endif 3763 ) { 3764 address func; 3765 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3766 if (func != (address)-1) { 3767 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3768 } 3769 func = JNI_FastGetField::generate_fast_get_byte_field(); 3770 if (func != (address)-1) { 3771 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3772 } 3773 func = JNI_FastGetField::generate_fast_get_char_field(); 3774 if (func != (address)-1) { 3775 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3776 } 3777 func = JNI_FastGetField::generate_fast_get_short_field(); 3778 if (func != (address)-1) { 3779 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3780 } 3781 func = JNI_FastGetField::generate_fast_get_int_field(); 3782 if (func != (address)-1) { 3783 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3784 } 3785 func = JNI_FastGetField::generate_fast_get_long_field(); 3786 if (func != (address)-1) { 3787 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3788 } 3789 func = JNI_FastGetField::generate_fast_get_float_field(); 3790 if (func != (address)-1) { 3791 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3792 } 3793 func = JNI_FastGetField::generate_fast_get_double_field(); 3794 if (func != (address)-1) { 3795 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3796 } 3797 } 3798 } 3799 3800 // Returns the function structure 3801 struct JNINativeInterface_* jni_functions() { 3802 #if INCLUDE_JNI_CHECK 3803 if (CheckJNICalls) return jni_functions_check(); 3804 #endif // INCLUDE_JNI_CHECK 3805 return &jni_NativeInterface; 3806 } 3807 3808 // Returns the function structure 3809 struct JNINativeInterface_* jni_functions_nocheck() { 3810 return &jni_NativeInterface; 3811 } 3812 3813 3814 // Invocation API 3815 3816 3817 // Forward declaration 3818 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3819 3820 // Global invocation API vars 3821 volatile jint vm_created = 0; 3822 // Indicate whether it is safe to recreate VM 3823 volatile jint safe_to_recreate_vm = 1; 3824 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3825 3826 3827 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3828 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3829 3830 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3831 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3832 3833 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3834 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3835 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3836 jint ret = JNI_ERR; 3837 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3838 3839 if (Threads::is_supported_jni_version(args->version)) { 3840 ret = JNI_OK; 3841 } 3842 // 1.1 style no longer supported in hotspot. 3843 // According the JNI spec, we should update args->version on return. 3844 // We also use the structure to communicate with launcher about default 3845 // stack size. 3846 if (args->version == JNI_VERSION_1_1) { 3847 args->version = JNI_VERSION_1_2; 3848 // javaStackSize is int in arguments structure 3849 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3850 args->javaStackSize = (jint)(ThreadStackSize * K); 3851 } 3852 return ret; 3853 } 3854 3855 #ifndef PRODUCT 3856 3857 #include "gc_implementation/shared/gcTimer.hpp" 3858 #include "gc_interface/collectedHeap.hpp" 3859 #if INCLUDE_ALL_GCS 3860 #include "gc_implementation/g1/heapRegionRemSet.hpp" 3861 #endif 3862 #include "utilities/quickSort.hpp" 3863 #include "utilities/ostream.hpp" 3864 #if INCLUDE_VM_STRUCTS 3865 #include "runtime/vmStructs.hpp" 3866 #endif 3867 3868 #define run_unit_test(unit_test_function_call) \ 3869 tty->print_cr("Running test: " #unit_test_function_call); \ 3870 unit_test_function_call 3871 3872 // Forward declaration 3873 void TestReservedSpace_test(); 3874 void TestReserveMemorySpecial_test(); 3875 void TestVirtualSpace_test(); 3876 void TestMetaspaceAux_test(); 3877 void TestMetachunk_test(); 3878 void TestVirtualSpaceNode_test(); 3879 void TestNewSize_test(); 3880 void TestOldSize_test(); 3881 void TestKlass_test(); 3882 void TestBitMap_test(); 3883 void TestAsUtf8(); 3884 #if INCLUDE_ALL_GCS 3885 void TestOldFreeSpaceCalculation_test(); 3886 void TestG1BiasedArray_test(); 3887 void TestBufferingOopClosure_test(); 3888 void TestCodeCacheRemSet_test(); 3889 #endif 3890 3891 void execute_internal_vm_tests() { 3892 if (ExecuteInternalVMTests) { 3893 tty->print_cr("Running internal VM tests"); 3894 run_unit_test(TestReservedSpace_test()); 3895 run_unit_test(TestReserveMemorySpecial_test()); 3896 run_unit_test(TestVirtualSpace_test()); 3897 run_unit_test(TestMetaspaceAux_test()); 3898 run_unit_test(TestMetachunk_test()); 3899 run_unit_test(TestVirtualSpaceNode_test()); 3900 run_unit_test(GlobalDefinitions::test_globals()); 3901 run_unit_test(GCTimerAllTest::all()); 3902 run_unit_test(arrayOopDesc::test_max_array_length()); 3903 run_unit_test(CollectedHeap::test_is_in()); 3904 run_unit_test(QuickSort::test_quick_sort()); 3905 run_unit_test(AltHashing::test_alt_hash()); 3906 run_unit_test(test_loggc_filename()); 3907 run_unit_test(TestNewSize_test()); 3908 run_unit_test(TestOldSize_test()); 3909 run_unit_test(TestKlass_test()); 3910 run_unit_test(TestBitMap_test()); 3911 run_unit_test(TestAsUtf8()); 3912 #if INCLUDE_VM_STRUCTS 3913 run_unit_test(VMStructs::test()); 3914 #endif 3915 #if INCLUDE_ALL_GCS 3916 run_unit_test(TestOldFreeSpaceCalculation_test()); 3917 run_unit_test(TestG1BiasedArray_test()); 3918 run_unit_test(HeapRegionRemSet::test_prt()); 3919 run_unit_test(TestBufferingOopClosure_test()); 3920 run_unit_test(TestCodeCacheRemSet_test()); 3921 #endif 3922 tty->print_cr("All internal VM tests passed"); 3923 } 3924 } 3925 3926 #undef run_unit_test 3927 3928 #endif 3929 3930 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3931 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3932 3933 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3934 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3935 3936 jint result = JNI_ERR; 3937 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3938 3939 // We're about to use Atomic::xchg for synchronization. Some Zero 3940 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3941 // but __sync_lock_test_and_set is not guaranteed to do what we want 3942 // on all architectures. So we check it works before relying on it. 3943 #if defined(ZERO) && defined(ASSERT) 3944 { 3945 jint a = 0xcafebabe; 3946 jint b = Atomic::xchg(0xdeadbeef, &a); 3947 void *c = &a; 3948 void *d = Atomic::xchg_ptr(&b, &c); 3949 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3950 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3951 } 3952 #endif // ZERO && ASSERT 3953 3954 // At the moment it's only possible to have one Java VM, 3955 // since some of the runtime state is in global variables. 3956 3957 // We cannot use our mutex locks here, since they only work on 3958 // Threads. We do an atomic compare and exchange to ensure only 3959 // one thread can call this method at a time 3960 3961 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3962 // the add/dec implementations are dependent on whether we are running 3963 // on a multiprocessor, and at this stage of initialization the os::is_MP 3964 // function used to determine this will always return false. Atomic::xchg 3965 // does not have this problem. 3966 if (Atomic::xchg(1, &vm_created) == 1) { 3967 return JNI_EEXIST; // already created, or create attempt in progress 3968 } 3969 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3970 return JNI_ERR; // someone tried and failed and retry not allowed. 3971 } 3972 3973 assert(vm_created == 1, "vm_created is true during the creation"); 3974 3975 /** 3976 * Certain errors during initialization are recoverable and do not 3977 * prevent this method from being called again at a later time 3978 * (perhaps with different arguments). However, at a certain 3979 * point during initialization if an error occurs we cannot allow 3980 * this function to be called again (or it will crash). In those 3981 * situations, the 'canTryAgain' flag is set to false, which atomically 3982 * sets safe_to_recreate_vm to 1, such that any new call to 3983 * JNI_CreateJavaVM will immediately fail using the above logic. 3984 */ 3985 bool can_try_again = true; 3986 3987 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3988 if (result == JNI_OK) { 3989 JavaThread *thread = JavaThread::current(); 3990 assert(!thread->has_pending_exception(), "should have returned not OK"); 3991 /* thread is thread_in_vm here */ 3992 *vm = (JavaVM *)(&main_vm); 3993 *(JNIEnv**)penv = thread->jni_environment(); 3994 3995 // Tracks the time application was running before GC 3996 RuntimeService::record_application_start(); 3997 3998 // Notify JVMTI 3999 if (JvmtiExport::should_post_thread_life()) { 4000 JvmtiExport::post_thread_start(thread); 4001 } 4002 4003 EventThreadStart event; 4004 if (event.should_commit()) { 4005 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4006 event.commit(); 4007 } 4008 4009 #ifndef PRODUCT 4010 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED 4011 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f() 4012 #endif 4013 4014 // Check if we should compile all classes on bootclasspath 4015 if (CompileTheWorld) ClassLoader::compile_the_world(); 4016 if (ReplayCompiles) ciReplay::replay(thread); 4017 4018 // Some platforms (like Win*) need a wrapper around these test 4019 // functions in order to properly handle error conditions. 4020 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler); 4021 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests); 4022 #endif 4023 4024 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4025 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4026 } else { 4027 // If create_vm exits because of a pending exception, exit with that 4028 // exception. In the future when we figure out how to reclaim memory, 4029 // we may be able to exit with JNI_ERR and allow the calling application 4030 // to continue. 4031 if (Universe::is_fully_initialized()) { 4032 // otherwise no pending exception possible - VM will already have aborted 4033 JavaThread* THREAD = JavaThread::current(); 4034 if (HAS_PENDING_EXCEPTION) { 4035 HandleMark hm; 4036 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4037 } 4038 } 4039 4040 if (can_try_again) { 4041 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4042 safe_to_recreate_vm = 1; 4043 } 4044 4045 // Creation failed. We must reset vm_created 4046 *vm = 0; 4047 *(JNIEnv**)penv = 0; 4048 // reset vm_created last to avoid race condition. Use OrderAccess to 4049 // control both compiler and architectural-based reordering. 4050 OrderAccess::release_store(&vm_created, 0); 4051 } 4052 4053 return result; 4054 } 4055 4056 4057 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4058 // See bug 4367188, the wrapper can sometimes cause VM crashes 4059 // JNIWrapper("GetCreatedJavaVMs"); 4060 4061 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4062 4063 if (vm_created) { 4064 if (numVMs != NULL) *numVMs = 1; 4065 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4066 } else { 4067 if (numVMs != NULL) *numVMs = 0; 4068 } 4069 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4070 return JNI_OK; 4071 } 4072 4073 extern "C" { 4074 4075 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4076 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4077 4078 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4079 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4080 jint res = JNI_ERR; 4081 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4082 4083 if (!vm_created) { 4084 res = JNI_ERR; 4085 return res; 4086 } 4087 4088 JNIWrapper("DestroyJavaVM"); 4089 JNIEnv *env; 4090 JavaVMAttachArgs destroyargs; 4091 destroyargs.version = CurrentVersion; 4092 destroyargs.name = (char *)"DestroyJavaVM"; 4093 destroyargs.group = NULL; 4094 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4095 if (res != JNI_OK) { 4096 return res; 4097 } 4098 4099 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4100 JavaThread* thread = JavaThread::current(); 4101 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4102 if (Threads::destroy_vm()) { 4103 // Should not change thread state, VM is gone 4104 vm_created = false; 4105 res = JNI_OK; 4106 return res; 4107 } else { 4108 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4109 res = JNI_ERR; 4110 return res; 4111 } 4112 } 4113 4114 4115 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4116 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4117 4118 // Check below commented out from JDK1.2fcs as well 4119 /* 4120 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4121 return JNI_EVERSION; 4122 } 4123 */ 4124 4125 Thread* t = ThreadLocalStorage::get_thread_slow(); 4126 if (t != NULL) { 4127 // If the thread has been attached this operation is a no-op 4128 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4129 return JNI_OK; 4130 } 4131 4132 // Create a thread and mark it as attaching so it will be skipped by the 4133 // ThreadsListEnumerator - see CR 6404306 4134 JavaThread* thread = new JavaThread(true); 4135 4136 // Set correct safepoint info. The thread is going to call into Java when 4137 // initializing the Java level thread object. Hence, the correct state must 4138 // be set in order for the Safepoint code to deal with it correctly. 4139 thread->set_thread_state(_thread_in_vm); 4140 // Must do this before initialize_thread_local_storage 4141 thread->record_stack_base_and_size(); 4142 4143 thread->initialize_thread_local_storage(); 4144 4145 if (!os::create_attached_thread(thread)) { 4146 delete thread; 4147 return JNI_ERR; 4148 } 4149 // Enable stack overflow checks 4150 thread->create_stack_guard_pages(); 4151 4152 thread->initialize_tlab(); 4153 4154 thread->cache_global_variables(); 4155 4156 // Crucial that we do not have a safepoint check for this thread, since it has 4157 // not been added to the Thread list yet. 4158 { Threads_lock->lock_without_safepoint_check(); 4159 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4160 // avoid this thread trying to do a GC before it is added to the thread-list 4161 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4162 Threads::add(thread, daemon); 4163 Threads_lock->unlock(); 4164 } 4165 // Create thread group and name info from attach arguments 4166 oop group = NULL; 4167 char* thread_name = NULL; 4168 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4169 group = JNIHandles::resolve(args->group); 4170 thread_name = args->name; // may be NULL 4171 } 4172 if (group == NULL) group = Universe::main_thread_group(); 4173 4174 // Create Java level thread object and attach it to this thread 4175 bool attach_failed = false; 4176 { 4177 EXCEPTION_MARK; 4178 HandleMark hm(THREAD); 4179 Handle thread_group(THREAD, group); 4180 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4181 if (HAS_PENDING_EXCEPTION) { 4182 CLEAR_PENDING_EXCEPTION; 4183 // cleanup outside the handle mark. 4184 attach_failed = true; 4185 } 4186 } 4187 4188 if (attach_failed) { 4189 // Added missing cleanup 4190 thread->cleanup_failed_attach_current_thread(); 4191 return JNI_ERR; 4192 } 4193 4194 // mark the thread as no longer attaching 4195 // this uses a fence to push the change through so we don't have 4196 // to regrab the threads_lock 4197 thread->set_done_attaching_via_jni(); 4198 4199 // Set java thread status. 4200 java_lang_Thread::set_thread_status(thread->threadObj(), 4201 java_lang_Thread::RUNNABLE); 4202 4203 // Notify the debugger 4204 if (JvmtiExport::should_post_thread_life()) { 4205 JvmtiExport::post_thread_start(thread); 4206 } 4207 4208 EventThreadStart event; 4209 if (event.should_commit()) { 4210 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4211 event.commit(); 4212 } 4213 4214 *(JNIEnv**)penv = thread->jni_environment(); 4215 4216 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4217 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4218 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4219 // needed. 4220 4221 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4222 4223 // Perform any platform dependent FPU setup 4224 os::setup_fpu(); 4225 4226 return JNI_OK; 4227 } 4228 4229 4230 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4231 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4232 if (!vm_created) { 4233 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4234 return JNI_ERR; 4235 } 4236 4237 JNIWrapper("AttachCurrentThread"); 4238 jint ret = attach_current_thread(vm, penv, _args, false); 4239 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4240 return ret; 4241 } 4242 4243 4244 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4245 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4246 VM_Exit::block_if_vm_exited(); 4247 4248 JNIWrapper("DetachCurrentThread"); 4249 4250 // If the thread has been deattacted the operations is a no-op 4251 if (ThreadLocalStorage::thread() == NULL) { 4252 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4253 return JNI_OK; 4254 } 4255 4256 JavaThread* thread = JavaThread::current(); 4257 if (thread->has_last_Java_frame()) { 4258 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4259 // Can't detach a thread that's running java, that can't work. 4260 return JNI_ERR; 4261 } 4262 4263 // Safepoint support. Have to do call-back to safepoint code, if in the 4264 // middel of a safepoint operation 4265 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4266 4267 // XXX: Note that JavaThread::exit() call below removes the guards on the 4268 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4269 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4270 // of the guards is visible in jni_AttachCurrentThread above, 4271 // the removal of the guards is buried below in JavaThread::exit() 4272 // here. The abstraction should be more symmetrically either exposed 4273 // or hidden (e.g. it could probably be hidden in the same 4274 // (platform-dependent) methods where we do alternate stack 4275 // maintenance work?) 4276 thread->exit(false, JavaThread::jni_detach); 4277 delete thread; 4278 4279 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4280 return JNI_OK; 4281 } 4282 4283 DT_RETURN_MARK_DECL(GetEnv, jint 4284 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4285 4286 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4287 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4288 jint ret = JNI_ERR; 4289 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4290 4291 if (!vm_created) { 4292 *penv = NULL; 4293 ret = JNI_EDETACHED; 4294 return ret; 4295 } 4296 4297 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4298 return ret; 4299 } 4300 4301 #ifndef JVMPI_VERSION_1 4302 // need these in order to be polite about older agents 4303 #define JVMPI_VERSION_1 ((jint)0x10000001) 4304 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4305 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4306 #endif // !JVMPI_VERSION_1 4307 4308 Thread* thread = ThreadLocalStorage::thread(); 4309 if (thread != NULL && thread->is_Java_thread()) { 4310 if (Threads::is_supported_jni_version_including_1_1(version)) { 4311 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4312 ret = JNI_OK; 4313 return ret; 4314 4315 } else if (version == JVMPI_VERSION_1 || 4316 version == JVMPI_VERSION_1_1 || 4317 version == JVMPI_VERSION_1_2) { 4318 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4319 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4320 ret = JNI_EVERSION; 4321 return ret; 4322 } else if (JvmtiExport::is_jvmdi_version(version)) { 4323 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4324 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4325 ret = JNI_EVERSION; 4326 return ret; 4327 } else { 4328 *penv = NULL; 4329 ret = JNI_EVERSION; 4330 return ret; 4331 } 4332 } else { 4333 *penv = NULL; 4334 ret = JNI_EDETACHED; 4335 return ret; 4336 } 4337 } 4338 4339 4340 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4341 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4342 if (!vm_created) { 4343 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4344 return JNI_ERR; 4345 } 4346 4347 JNIWrapper("AttachCurrentThreadAsDaemon"); 4348 jint ret = attach_current_thread(vm, penv, _args, true); 4349 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4350 return ret; 4351 } 4352 4353 4354 } // End extern "C" 4355 4356 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4357 NULL, 4358 NULL, 4359 NULL, 4360 4361 jni_DestroyJavaVM, 4362 jni_AttachCurrentThread, 4363 jni_DetachCurrentThread, 4364 jni_GetEnv, 4365 jni_AttachCurrentThreadAsDaemon 4366 };