1 /* 2 * Copyright (c) 1997, 2018, 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 "jni.h" 28 #include "jvm.h" 29 #include "ci/ciReplay.hpp" 30 #include "classfile/altHashing.hpp" 31 #include "classfile/classFileStream.hpp" 32 #include "classfile/classLoader.hpp" 33 #include "classfile/javaClasses.hpp" 34 #include "classfile/javaClasses.inline.hpp" 35 #include "classfile/modules.hpp" 36 #include "classfile/symbolTable.hpp" 37 #include "classfile/systemDictionary.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "gc/shared/gcLocker.inline.hpp" 40 #include "interpreter/linkResolver.hpp" 41 #include "memory/allocation.hpp" 42 #include "memory/allocation.inline.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.hpp" 46 #include "oops/access.inline.hpp" 47 #include "oops/arrayOop.inline.hpp" 48 #include "oops/instanceKlass.hpp" 49 #include "oops/instanceOop.hpp" 50 #include "oops/markOop.hpp" 51 #include "oops/method.hpp" 52 #include "oops/objArrayKlass.hpp" 53 #include "oops/objArrayOop.inline.hpp" 54 #include "oops/oop.inline.hpp" 55 #include "oops/symbol.hpp" 56 #include "oops/typeArrayKlass.hpp" 57 #include "oops/typeArrayOop.inline.hpp" 58 #include "prims/jniCheck.hpp" 59 #include "prims/jniExport.hpp" 60 #include "prims/jniFastGetField.hpp" 61 #include "prims/jvm_misc.hpp" 62 #include "prims/jvmtiExport.hpp" 63 #include "prims/jvmtiThreadState.hpp" 64 #include "runtime/atomic.hpp" 65 #include "runtime/compilationPolicy.hpp" 66 #include "runtime/fieldDescriptor.hpp" 67 #include "runtime/handles.inline.hpp" 68 #include "runtime/interfaceSupport.hpp" 69 #include "runtime/java.hpp" 70 #include "runtime/javaCalls.hpp" 71 #include "runtime/jfieldIDWorkaround.hpp" 72 #include "runtime/jniHandles.inline.hpp" 73 #include "runtime/orderAccess.inline.hpp" 74 #include "runtime/reflection.hpp" 75 #include "runtime/sharedRuntime.hpp" 76 #include "runtime/signature.hpp" 77 #include "runtime/thread.inline.hpp" 78 #include "runtime/vm_operations.hpp" 79 #include "services/memTracker.hpp" 80 #include "services/runtimeService.hpp" 81 #include "trace/traceMacros.hpp" 82 #include "trace/tracing.hpp" 83 #include "utilities/defaultStream.hpp" 84 #include "utilities/dtrace.hpp" 85 #include "utilities/events.hpp" 86 #include "utilities/histogram.hpp" 87 #include "utilities/internalVMTests.hpp" 88 #include "utilities/macros.hpp" 89 #include "utilities/vmError.hpp" 90 #if INCLUDE_JVMCI 91 #include "jvmci/jvmciCompiler.hpp" 92 #include "jvmci/jvmciRuntime.hpp" 93 #endif 94 95 static jint CurrentVersion = JNI_VERSION_10; 96 97 #ifdef _WIN32 98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 99 #endif 100 101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace 102 // '-return' probe regardless of the return path is taken out of the function. 103 // Methods that have multiple return paths use this to avoid having to 104 // instrument each return path. Methods that use CHECK or THROW must use this 105 // since those macros can cause an immedate uninstrumented return. 106 // 107 // In order to get the return value, a reference to the variable containing 108 // the return value must be passed to the contructor of the object, and 109 // the return value must be set before return (since the mark object has 110 // a reference to it). 111 // 112 // Example: 113 // DT_RETURN_MARK_DECL(SomeFunc, int); 114 // JNI_ENTRY(int, SomeFunc, ...) 115 // int return_value = 0; 116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 117 // foo(CHECK_0) 118 // return_value = 5; 119 // return return_value; 120 // JNI_END 121 #define DT_RETURN_MARK_DECL(name, type, probe) \ 122 DTRACE_ONLY( \ 123 class DTraceReturnProbeMark_##name { \ 124 public: \ 125 const type& _ret_ref; \ 126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 127 ~DTraceReturnProbeMark_##name() { \ 128 probe; \ 129 } \ 130 } \ 131 ) 132 // Void functions are simpler since there's no return value 133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \ 134 DTRACE_ONLY( \ 135 class DTraceReturnProbeMark_##name { \ 136 public: \ 137 ~DTraceReturnProbeMark_##name() { \ 138 probe; \ 139 } \ 140 } \ 141 ) 142 143 // Place these macros in the function to mark the return. Non-void 144 // functions need the type and address of the return value. 145 #define DT_RETURN_MARK(name, type, ref) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 147 #define DT_VOID_RETURN_MARK(name) \ 148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 149 150 151 // Use these to select distinct code for floating-point vs. non-floating point 152 // situations. Used from within common macros where we need slightly 153 // different behavior for Float/Double 154 #define FP_SELECT_Boolean(intcode, fpcode) intcode 155 #define FP_SELECT_Byte(intcode, fpcode) intcode 156 #define FP_SELECT_Char(intcode, fpcode) intcode 157 #define FP_SELECT_Short(intcode, fpcode) intcode 158 #define FP_SELECT_Object(intcode, fpcode) intcode 159 #define FP_SELECT_Int(intcode, fpcode) intcode 160 #define FP_SELECT_Long(intcode, fpcode) intcode 161 #define FP_SELECT_Float(intcode, fpcode) fpcode 162 #define FP_SELECT_Double(intcode, fpcode) fpcode 163 #define FP_SELECT(TypeName, intcode, fpcode) \ 164 FP_SELECT_##TypeName(intcode, fpcode) 165 166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void 167 // (dtrace doesn't do FP yet) 168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 172 FP_SELECT(TypeName, \ 173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 174 175 176 // out-of-line helpers for class jfieldIDWorkaround: 177 178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 180 uintptr_t as_uint = (uintptr_t) id; 181 intptr_t offset = raw_instance_offset(id); 182 if (is_checked_jfieldID(id)) { 183 if (!klass_hash_ok(k, id)) { 184 return false; 185 } 186 } 187 return InstanceKlass::cast(k)->contains_field_offset(offset); 188 } else { 189 JNIid* result = (JNIid*) id; 190 #ifdef ASSERT 191 return result != NULL && result->is_static_field_id(); 192 #else 193 return result != NULL; 194 #endif 195 } 196 } 197 198 199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 200 if (offset <= small_offset_mask) { 201 Klass* field_klass = k; 202 Klass* super_klass = field_klass->super(); 203 // With compressed oops the most super class with nonstatic fields would 204 // be the owner of fields embedded in the header. 205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 207 field_klass = super_klass; // super contains the field also 208 super_klass = field_klass->super(); 209 } 210 debug_only(NoSafepointVerifier nosafepoint;) 211 uintptr_t klass_hash = field_klass->identity_hash(); 212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 213 } else { 214 #if 0 215 #ifndef PRODUCT 216 { 217 ResourceMark rm; 218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 219 } 220 #endif 221 #endif 222 return 0; 223 } 224 } 225 226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 227 uintptr_t as_uint = (uintptr_t) id; 228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 229 do { 230 debug_only(NoSafepointVerifier nosafepoint;) 231 // Could use a non-blocking query for identity_hash here... 232 if ((k->identity_hash() & klass_mask) == klass_hash) 233 return true; 234 k = k->super(); 235 } while (k != NULL); 236 return false; 237 } 238 239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 241 uintptr_t as_uint = (uintptr_t) id; 242 intptr_t offset = raw_instance_offset(id); 243 if (VerifyJNIFields) { 244 if (is_checked_jfieldID(id)) { 245 guarantee(klass_hash_ok(k, id), 246 "Bug in native code: jfieldID class must match object"); 247 } else { 248 #if 0 249 #ifndef PRODUCT 250 if (Verbose) { 251 ResourceMark rm; 252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 253 } 254 #endif 255 #endif 256 } 257 } 258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 259 "Bug in native code: jfieldID offset must address interior of object"); 260 } 261 262 // Wrapper to trace JNI functions 263 264 #ifdef ASSERT 265 Histogram* JNIHistogram; 266 static volatile int JNIHistogram_lock = 0; 267 268 class JNIHistogramElement : public HistogramElement { 269 public: 270 JNIHistogramElement(const char* name); 271 }; 272 273 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 274 _name = elementName; 275 uintx count = 0; 276 277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 279 count +=1; 280 if ( (WarnOnStalledSpinLock > 0) 281 && (count % WarnOnStalledSpinLock == 0)) { 282 warning("JNIHistogram_lock seems to be stalled"); 283 } 284 } 285 } 286 287 288 if(JNIHistogram == NULL) 289 JNIHistogram = new Histogram("JNI Call Counts",100); 290 291 JNIHistogram->add_element(this); 292 Atomic::dec(&JNIHistogram_lock); 293 } 294 295 #define JNICountWrapper(arg) \ 296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 298 if (e != NULL) e->increment_count() 299 #define JNIWrapper(arg) JNICountWrapper(arg); 300 #else 301 #define JNIWrapper(arg) 302 #endif 303 304 305 // Implementation of JNI entries 306 307 DT_RETURN_MARK_DECL(DefineClass, jclass 308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 309 310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 311 const jbyte *buf, jsize bufLen)) 312 JNIWrapper("DefineClass"); 313 314 HOTSPOT_JNI_DEFINECLASS_ENTRY( 315 env, (char*) name, loaderRef, (char*) buf, bufLen); 316 317 jclass cls = NULL; 318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 319 320 TempNewSymbol class_name = NULL; 321 // Since exceptions can be thrown, class initialization can take place 322 // if name is NULL no check for class name in .class stream has to be made. 323 if (name != NULL) { 324 const int str_len = (int)strlen(name); 325 if (str_len > Symbol::max_length()) { 326 // It's impossible to create this class; the name cannot fit 327 // into the constant pool. 328 Exceptions::fthrow(THREAD_AND_LOCATION, 329 vmSymbols::java_lang_NoClassDefFoundError(), 330 "Class name exceeds maximum length of %d: %s", 331 Symbol::max_length(), 332 name); 333 return 0; 334 } 335 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 336 } 337 ResourceMark rm(THREAD); 338 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 340 341 if (UsePerfData && !class_loader.is_null()) { 342 // check whether the current caller thread holds the lock or not. 343 // If not, increment the corresponding counter 344 if (ObjectSynchronizer:: 345 query_lock_ownership((JavaThread*)THREAD, class_loader) != 346 ObjectSynchronizer::owner_self) { 347 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 348 } 349 } 350 Klass* k = SystemDictionary::resolve_from_stream(class_name, 351 class_loader, 352 Handle(), 353 &st, 354 CHECK_NULL); 355 356 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 357 trace_class_resolution(k); 358 } 359 360 cls = (jclass)JNIHandles::make_local( 361 env, k->java_mirror()); 362 return cls; 363 JNI_END 364 365 366 367 static bool first_time_FindClass = true; 368 369 DT_RETURN_MARK_DECL(FindClass, jclass 370 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 371 372 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 373 JNIWrapper("FindClass"); 374 375 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 376 377 jclass result = NULL; 378 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 379 380 // Remember if we are the first invocation of jni_FindClass 381 bool first_time = first_time_FindClass; 382 first_time_FindClass = false; 383 384 // Sanity check the name: it cannot be null or larger than the maximum size 385 // name we can fit in the constant pool. 386 if (name == NULL) { 387 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given"); 388 } 389 if ((int)strlen(name) > Symbol::max_length()) { 390 Exceptions::fthrow(THREAD_AND_LOCATION, 391 vmSymbols::java_lang_NoClassDefFoundError(), 392 "Class name exceeds maximum length of %d: %s", 393 Symbol::max_length(), 394 name); 395 return 0; 396 } 397 398 //%note jni_3 399 Handle protection_domain; 400 // Find calling class 401 Klass* k = thread->security_get_caller_class(0); 402 // default to the system loader when no context 403 Handle loader(THREAD, SystemDictionary::java_system_loader()); 404 if (k != NULL) { 405 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 406 // in the correct class context. 407 if (k->class_loader() == NULL && 408 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 409 JavaValue result(T_OBJECT); 410 JavaCalls::call_static(&result, k, 411 vmSymbols::getFromClass_name(), 412 vmSymbols::void_class_signature(), 413 CHECK_NULL); 414 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns 415 // a non-NULL Class object. When invoked from JNI_OnUnload, 416 // it will return NULL to indicate no context. 417 oop mirror = (oop) result.get_jobject(); 418 if (mirror != NULL) { 419 Klass* fromClass = java_lang_Class::as_Klass(mirror); 420 loader = Handle(THREAD, fromClass->class_loader()); 421 protection_domain = Handle(THREAD, fromClass->protection_domain()); 422 } 423 } else { 424 loader = Handle(THREAD, k->class_loader()); 425 } 426 } 427 428 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 429 result = find_class_from_class_loader(env, sym, true, loader, 430 protection_domain, true, thread); 431 432 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 433 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 434 } 435 436 // If we were the first invocation of jni_FindClass, we enable compilation again 437 // rather than just allowing invocation counter to overflow and decay. 438 // Controlled by flag DelayCompilationDuringStartup. 439 if (first_time && !CompileTheWorld) 440 CompilationPolicy::completed_vm_startup(); 441 442 return result; 443 JNI_END 444 445 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 446 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 447 448 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 449 JNIWrapper("FromReflectedMethod"); 450 451 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 452 453 jmethodID ret = NULL; 454 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 455 456 // method is a handle to a java.lang.reflect.Method object 457 oop reflected = JNIHandles::resolve_non_null(method); 458 oop mirror = NULL; 459 int slot = 0; 460 461 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 462 mirror = java_lang_reflect_Constructor::clazz(reflected); 463 slot = java_lang_reflect_Constructor::slot(reflected); 464 } else { 465 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 466 mirror = java_lang_reflect_Method::clazz(reflected); 467 slot = java_lang_reflect_Method::slot(reflected); 468 } 469 Klass* k1 = java_lang_Class::as_Klass(mirror); 470 471 // Make sure class is initialized before handing id's out to methods 472 k1->initialize(CHECK_NULL); 473 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot); 474 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 475 return ret; 476 JNI_END 477 478 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 479 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 480 481 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 482 JNIWrapper("FromReflectedField"); 483 484 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 485 486 jfieldID ret = NULL; 487 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 488 489 // field is a handle to a java.lang.reflect.Field object 490 oop reflected = JNIHandles::resolve_non_null(field); 491 oop mirror = java_lang_reflect_Field::clazz(reflected); 492 Klass* k1 = java_lang_Class::as_Klass(mirror); 493 int slot = java_lang_reflect_Field::slot(reflected); 494 int modifiers = java_lang_reflect_Field::modifiers(reflected); 495 496 // Make sure class is initialized before handing id's out to fields 497 k1->initialize(CHECK_NULL); 498 499 // First check if this is a static field 500 if (modifiers & JVM_ACC_STATIC) { 501 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 502 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset); 503 assert(id != NULL, "corrupt Field object"); 504 debug_only(id->set_is_static_field_id();) 505 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 506 ret = jfieldIDWorkaround::to_static_jfieldID(id); 507 return ret; 508 } 509 510 // The slot is the index of the field description in the field-array 511 // The jfieldID is the offset of the field within the object 512 // It may also have hash bits for k, if VerifyJNIFields is turned on. 513 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot ); 514 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object"); 515 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset); 516 return ret; 517 JNI_END 518 519 520 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 521 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 522 523 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 524 JNIWrapper("ToReflectedMethod"); 525 526 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 527 528 jobject ret = NULL; 529 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 530 531 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 532 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 533 oop reflection_method; 534 if (m->is_initializer()) { 535 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 536 } else { 537 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 538 } 539 ret = JNIHandles::make_local(env, reflection_method); 540 return ret; 541 JNI_END 542 543 DT_RETURN_MARK_DECL(GetSuperclass, jclass 544 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 545 546 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 547 JNIWrapper("GetSuperclass"); 548 549 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 550 551 jclass obj = NULL; 552 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 553 554 oop mirror = JNIHandles::resolve_non_null(sub); 555 // primitive classes return NULL 556 if (java_lang_Class::is_primitive(mirror)) return NULL; 557 558 // Rules of Class.getSuperClass as implemented by KLass::java_super: 559 // arrays return Object 560 // interfaces return NULL 561 // proper classes return Klass::super() 562 Klass* k = java_lang_Class::as_Klass(mirror); 563 if (k->is_interface()) return NULL; 564 565 // return mirror for superclass 566 Klass* super = k->java_super(); 567 // super2 is the value computed by the compiler's getSuperClass intrinsic: 568 debug_only(Klass* super2 = ( k->is_array_klass() 569 ? SystemDictionary::Object_klass() 570 : k->super() ) ); 571 assert(super == super2, 572 "java_super computation depends on interface, array, other super"); 573 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 574 return obj; 575 JNI_END 576 577 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 578 JNIWrapper("IsSubclassOf"); 579 580 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 581 582 oop sub_mirror = JNIHandles::resolve_non_null(sub); 583 oop super_mirror = JNIHandles::resolve_non_null(super); 584 if (java_lang_Class::is_primitive(sub_mirror) || 585 java_lang_Class::is_primitive(super_mirror)) { 586 jboolean ret = (sub_mirror == super_mirror); 587 588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 589 return ret; 590 } 591 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 592 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 593 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 594 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 595 JNI_TRUE : JNI_FALSE; 596 597 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 598 return ret; 599 JNI_END 600 601 602 DT_RETURN_MARK_DECL(Throw, jint 603 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 604 605 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 606 JNIWrapper("Throw"); 607 608 HOTSPOT_JNI_THROW_ENTRY(env, obj); 609 610 jint ret = JNI_OK; 611 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 612 613 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 614 ShouldNotReachHere(); 615 return 0; // Mute compiler. 616 JNI_END 617 618 619 DT_RETURN_MARK_DECL(ThrowNew, jint 620 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 621 622 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 623 JNIWrapper("ThrowNew"); 624 625 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 626 627 jint ret = JNI_OK; 628 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 629 630 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 631 Symbol* name = k->name(); 632 Handle class_loader (THREAD, k->class_loader()); 633 Handle protection_domain (THREAD, k->protection_domain()); 634 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 635 ShouldNotReachHere(); 636 return 0; // Mute compiler. 637 JNI_END 638 639 640 // JNI functions only transform a pending async exception to a synchronous 641 // exception in ExceptionOccurred and ExceptionCheck calls, since 642 // delivering an async exception in other places won't change the native 643 // code's control flow and would be harmful when native code further calls 644 // JNI functions with a pending exception. Async exception is also checked 645 // during the call, so ExceptionOccurred/ExceptionCheck won't return 646 // false but deliver the async exception at the very end during 647 // state transition. 648 649 static void jni_check_async_exceptions(JavaThread *thread) { 650 assert(thread == Thread::current(), "must be itself"); 651 thread->check_and_handle_async_exceptions(); 652 } 653 654 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 655 JNIWrapper("ExceptionOccurred"); 656 657 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 658 659 jni_check_async_exceptions(thread); 660 oop exception = thread->pending_exception(); 661 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 662 663 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 664 return ret; 665 JNI_END 666 667 668 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 669 JNIWrapper("ExceptionDescribe"); 670 671 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 672 673 if (thread->has_pending_exception()) { 674 Handle ex(thread, thread->pending_exception()); 675 thread->clear_pending_exception(); 676 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 677 // Don't print anything if we are being killed. 678 } else { 679 jio_fprintf(defaultStream::error_stream(), "Exception "); 680 if (thread != NULL && thread->threadObj() != NULL) { 681 ResourceMark rm(THREAD); 682 jio_fprintf(defaultStream::error_stream(), 683 "in thread \"%s\" ", thread->get_thread_name()); 684 } 685 if (ex->is_a(SystemDictionary::Throwable_klass())) { 686 JavaValue result(T_VOID); 687 JavaCalls::call_virtual(&result, 688 ex, 689 SystemDictionary::Throwable_klass(), 690 vmSymbols::printStackTrace_name(), 691 vmSymbols::void_method_signature(), 692 THREAD); 693 // If an exception is thrown in the call it gets thrown away. Not much 694 // we can do with it. The native code that calls this, does not check 695 // for the exception - hence, it might still be in the thread when DestroyVM gets 696 // called, potentially causing a few asserts to trigger - since no pending exception 697 // is expected. 698 CLEAR_PENDING_EXCEPTION; 699 } else { 700 ResourceMark rm(THREAD); 701 jio_fprintf(defaultStream::error_stream(), 702 ". Uncaught exception of type %s.", 703 ex->klass()->external_name()); 704 } 705 } 706 } 707 708 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 709 JNI_END 710 711 712 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 713 JNIWrapper("ExceptionClear"); 714 715 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 716 717 // The jni code might be using this API to clear java thrown exception. 718 // So just mark jvmti thread exception state as exception caught. 719 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 720 if (state != NULL && state->is_exception_detected()) { 721 state->set_exception_caught(); 722 } 723 thread->clear_pending_exception(); 724 725 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 726 JNI_END 727 728 729 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 730 JNIWrapper("FatalError"); 731 732 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 733 734 tty->print_cr("FATAL ERROR in native method: %s", msg); 735 thread->print_stack(); 736 os::abort(); // Dump core and abort 737 JNI_END 738 739 740 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 741 JNIWrapper("PushLocalFrame"); 742 743 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 744 745 //%note jni_11 746 if (capacity < 0 || 747 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 748 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 749 return JNI_ERR; 750 } 751 JNIHandleBlock* old_handles = thread->active_handles(); 752 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 753 assert(new_handles != NULL, "should not be NULL"); 754 new_handles->set_pop_frame_link(old_handles); 755 thread->set_active_handles(new_handles); 756 jint ret = JNI_OK; 757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 758 return ret; 759 JNI_END 760 761 762 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 763 JNIWrapper("PopLocalFrame"); 764 765 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 766 767 //%note jni_11 768 Handle result_handle(thread, JNIHandles::resolve(result)); 769 JNIHandleBlock* old_handles = thread->active_handles(); 770 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 771 if (new_handles != NULL) { 772 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 773 // This way code will still work if PopLocalFrame is called without a corresponding 774 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 775 // the release_block call will release the blocks. 776 thread->set_active_handles(new_handles); 777 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 778 JNIHandleBlock::release_block(old_handles, thread); // may block 779 result = JNIHandles::make_local(thread, result_handle()); 780 } 781 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 782 return result; 783 JNI_END 784 785 786 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 787 JNIWrapper("NewGlobalRef"); 788 789 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 790 791 Handle ref_handle(thread, JNIHandles::resolve(ref)); 792 jobject ret = JNIHandles::make_global(ref_handle); 793 794 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 795 return ret; 796 JNI_END 797 798 // Must be JNI_ENTRY (with HandleMark) 799 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 800 JNIWrapper("DeleteGlobalRef"); 801 802 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 803 804 JNIHandles::destroy_global(ref); 805 806 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 807 JNI_END 808 809 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 810 JNIWrapper("DeleteLocalRef"); 811 812 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 813 814 JNIHandles::destroy_local(obj); 815 816 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 817 JNI_END 818 819 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 820 JNIWrapper("IsSameObject"); 821 822 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 823 824 oop a = JNIHandles::resolve(r1); 825 oop b = JNIHandles::resolve(r2); 826 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 827 828 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 829 return ret; 830 JNI_END 831 832 833 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 834 JNIWrapper("NewLocalRef"); 835 836 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 837 838 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 839 840 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 841 return ret; 842 JNI_END 843 844 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 845 JNIWrapper("EnsureLocalCapacity"); 846 847 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 848 849 jint ret; 850 if (capacity >= 0 && 851 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 852 ret = JNI_OK; 853 } else { 854 ret = JNI_ERR; 855 } 856 857 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 858 return ret; 859 JNI_END 860 861 // Return the Handle Type 862 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 863 JNIWrapper("GetObjectRefType"); 864 865 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 866 867 jobjectRefType ret = JNIInvalidRefType; 868 if (obj != NULL) { 869 ret = JNIHandles::handle_type(thread, obj); 870 } 871 872 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 873 return ret; 874 JNI_END 875 876 877 class JNI_ArgumentPusher : public SignatureIterator { 878 protected: 879 JavaCallArguments* _arguments; 880 881 virtual void get_bool () = 0; 882 virtual void get_char () = 0; 883 virtual void get_short () = 0; 884 virtual void get_byte () = 0; 885 virtual void get_int () = 0; 886 virtual void get_long () = 0; 887 virtual void get_float () = 0; 888 virtual void get_double () = 0; 889 virtual void get_object () = 0; 890 891 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 892 this->_return_type = T_ILLEGAL; 893 _arguments = NULL; 894 } 895 896 public: 897 virtual void iterate( uint64_t fingerprint ) = 0; 898 899 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 900 901 inline void do_bool() { if (!is_return_type()) get_bool(); } 902 inline void do_char() { if (!is_return_type()) get_char(); } 903 inline void do_short() { if (!is_return_type()) get_short(); } 904 inline void do_byte() { if (!is_return_type()) get_byte(); } 905 inline void do_int() { if (!is_return_type()) get_int(); } 906 inline void do_long() { if (!is_return_type()) get_long(); } 907 inline void do_float() { if (!is_return_type()) get_float(); } 908 inline void do_double() { if (!is_return_type()) get_double(); } 909 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 910 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 911 inline void do_void() { } 912 913 JavaCallArguments* arguments() { return _arguments; } 914 void push_receiver(Handle h) { _arguments->push_oop(h); } 915 }; 916 917 918 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 919 protected: 920 va_list _ap; 921 922 inline void get_bool() { 923 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 924 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 925 // TemplateInterpreterGenerator::generate_result_handler_for and 926 // SharedRuntime::generate_native_wrapper. 927 jboolean b = va_arg(_ap, jint); 928 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 929 } 930 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 931 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 932 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 933 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 934 935 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 936 937 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 938 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 939 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 940 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); } 941 942 inline void set_ap(va_list rap) { 943 va_copy(_ap, rap); 944 } 945 946 public: 947 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 948 : JNI_ArgumentPusher(signature) { 949 set_ap(rap); 950 } 951 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 952 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 953 set_ap(rap); 954 } 955 956 // Optimized path if we have the bitvector form of signature 957 void iterate( uint64_t fingerprint ) { 958 if (fingerprint == (uint64_t)CONST64(-1)) { 959 SignatureIterator::iterate(); // Must be too many arguments 960 } else { 961 _return_type = (BasicType)((fingerprint >> static_feature_size) & 962 result_feature_mask); 963 964 assert(fingerprint, "Fingerprint should not be 0"); 965 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 966 while ( 1 ) { 967 switch ( fingerprint & parameter_feature_mask ) { 968 case bool_parm: 969 get_bool(); 970 break; 971 case char_parm: 972 get_char(); 973 break; 974 case short_parm: 975 get_short(); 976 break; 977 case byte_parm: 978 get_byte(); 979 break; 980 case int_parm: 981 get_int(); 982 break; 983 case obj_parm: 984 get_object(); 985 break; 986 case long_parm: 987 get_long(); 988 break; 989 case float_parm: 990 get_float(); 991 break; 992 case double_parm: 993 get_double(); 994 break; 995 case done_parm: 996 return; 997 break; 998 default: 999 ShouldNotReachHere(); 1000 break; 1001 } 1002 fingerprint >>= parameter_feature_size; 1003 } 1004 } 1005 } 1006 }; 1007 1008 1009 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1010 protected: 1011 const jvalue *_ap; 1012 1013 inline void get_bool() { 1014 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1015 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1016 // TemplateInterpreterGenerator::generate_result_handler_for and 1017 // SharedRuntime::generate_native_wrapper. 1018 jboolean b = (_ap++)->z; 1019 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1020 } 1021 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1022 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1023 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1024 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1025 1026 inline void get_long() { _arguments->push_long((_ap++)->j); } 1027 inline void get_float() { _arguments->push_float((_ap++)->f); } 1028 inline void get_double() { _arguments->push_double((_ap++)->d);} 1029 inline void get_object() { _arguments->push_jobject((_ap++)->l); } 1030 1031 inline void set_ap(const jvalue *rap) { _ap = rap; } 1032 1033 public: 1034 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1035 : JNI_ArgumentPusher(signature) { 1036 set_ap(rap); 1037 } 1038 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1039 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1040 set_ap(rap); 1041 } 1042 1043 // Optimized path if we have the bitvector form of signature 1044 void iterate( uint64_t fingerprint ) { 1045 if (fingerprint == (uint64_t)CONST64(-1)) { 1046 SignatureIterator::iterate(); // Must be too many arguments 1047 } else { 1048 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1049 result_feature_mask); 1050 assert(fingerprint, "Fingerprint should not be 0"); 1051 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1052 while ( 1 ) { 1053 switch ( fingerprint & parameter_feature_mask ) { 1054 case bool_parm: 1055 get_bool(); 1056 break; 1057 case char_parm: 1058 get_char(); 1059 break; 1060 case short_parm: 1061 get_short(); 1062 break; 1063 case byte_parm: 1064 get_byte(); 1065 break; 1066 case int_parm: 1067 get_int(); 1068 break; 1069 case obj_parm: 1070 get_object(); 1071 break; 1072 case long_parm: 1073 get_long(); 1074 break; 1075 case float_parm: 1076 get_float(); 1077 break; 1078 case double_parm: 1079 get_double(); 1080 break; 1081 case done_parm: 1082 return; 1083 break; 1084 default: 1085 ShouldNotReachHere(); 1086 break; 1087 } 1088 fingerprint >>= parameter_feature_size; 1089 } 1090 } 1091 } 1092 }; 1093 1094 1095 enum JNICallType { 1096 JNI_STATIC, 1097 JNI_VIRTUAL, 1098 JNI_NONVIRTUAL 1099 }; 1100 1101 1102 1103 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1104 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1105 1106 // Create object to hold arguments for the JavaCall, and associate it with 1107 // the jni parser 1108 ResourceMark rm(THREAD); 1109 int number_of_parameters = method->size_of_parameters(); 1110 JavaCallArguments java_args(number_of_parameters); 1111 args->set_java_argument_object(&java_args); 1112 1113 assert(method->is_static(), "method should be static"); 1114 1115 // Fill out JavaCallArguments object 1116 args->iterate( Fingerprinter(method).fingerprint() ); 1117 // Initialize result type 1118 result->set_type(args->get_ret_type()); 1119 1120 // Invoke the method. Result is returned as oop. 1121 JavaCalls::call(result, method, &java_args, CHECK); 1122 1123 // Convert result 1124 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1125 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1126 } 1127 } 1128 1129 1130 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1131 oop recv = JNIHandles::resolve(receiver); 1132 if (recv == NULL) { 1133 THROW(vmSymbols::java_lang_NullPointerException()); 1134 } 1135 Handle h_recv(THREAD, recv); 1136 1137 int number_of_parameters; 1138 Method* selected_method; 1139 { 1140 Method* m = Method::resolve_jmethod_id(method_id); 1141 number_of_parameters = m->size_of_parameters(); 1142 Klass* holder = m->method_holder(); 1143 if (call_type != JNI_VIRTUAL) { 1144 selected_method = m; 1145 } else if (!m->has_itable_index()) { 1146 // non-interface call -- for that little speed boost, don't handlize 1147 debug_only(NoSafepointVerifier nosafepoint;) 1148 // jni_GetMethodID makes sure class is linked and initialized 1149 // so m should have a valid vtable index. 1150 assert(m->valid_vtable_index(), "no valid vtable index"); 1151 int vtbl_index = m->vtable_index(); 1152 if (vtbl_index != Method::nonvirtual_vtable_index) { 1153 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1154 } else { 1155 // final method 1156 selected_method = m; 1157 } 1158 } else { 1159 // interface call 1160 int itbl_index = m->itable_index(); 1161 Klass* k = h_recv->klass(); 1162 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK); 1163 } 1164 } 1165 1166 methodHandle method(THREAD, selected_method); 1167 1168 // Create object to hold arguments for the JavaCall, and associate it with 1169 // the jni parser 1170 ResourceMark rm(THREAD); 1171 JavaCallArguments java_args(number_of_parameters); 1172 args->set_java_argument_object(&java_args); 1173 1174 // handle arguments 1175 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string()); 1176 args->push_receiver(h_recv); // Push jobject handle 1177 1178 // Fill out JavaCallArguments object 1179 args->iterate( Fingerprinter(method).fingerprint() ); 1180 // Initialize result type 1181 result->set_type(args->get_ret_type()); 1182 1183 // Invoke the method. Result is returned as oop. 1184 JavaCalls::call(result, method, &java_args, CHECK); 1185 1186 // Convert result 1187 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1188 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1189 } 1190 } 1191 1192 1193 static instanceOop alloc_object(jclass clazz, TRAPS) { 1194 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1195 if (k == NULL) { 1196 ResourceMark rm(THREAD); 1197 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1198 } 1199 k->check_valid_for_instantiation(false, CHECK_NULL); 1200 k->initialize(CHECK_NULL); 1201 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD); 1202 return ih; 1203 } 1204 1205 DT_RETURN_MARK_DECL(AllocObject, jobject 1206 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1207 1208 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1209 JNIWrapper("AllocObject"); 1210 1211 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1212 1213 jobject ret = NULL; 1214 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1215 1216 instanceOop i = alloc_object(clazz, CHECK_NULL); 1217 ret = JNIHandles::make_local(env, i); 1218 return ret; 1219 JNI_END 1220 1221 DT_RETURN_MARK_DECL(NewObjectA, jobject 1222 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1223 1224 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1225 JNIWrapper("NewObjectA"); 1226 1227 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1228 1229 jobject obj = NULL; 1230 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1231 1232 instanceOop i = alloc_object(clazz, CHECK_NULL); 1233 obj = JNIHandles::make_local(env, i); 1234 JavaValue jvalue(T_VOID); 1235 JNI_ArgumentPusherArray ap(methodID, args); 1236 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1237 return obj; 1238 JNI_END 1239 1240 1241 DT_RETURN_MARK_DECL(NewObjectV, jobject 1242 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1243 1244 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1245 JNIWrapper("NewObjectV"); 1246 1247 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1248 1249 jobject obj = NULL; 1250 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1251 1252 instanceOop i = alloc_object(clazz, CHECK_NULL); 1253 obj = JNIHandles::make_local(env, i); 1254 JavaValue jvalue(T_VOID); 1255 JNI_ArgumentPusherVaArg ap(methodID, args); 1256 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1257 return obj; 1258 JNI_END 1259 1260 1261 DT_RETURN_MARK_DECL(NewObject, jobject 1262 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1263 1264 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1265 JNIWrapper("NewObject"); 1266 1267 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1268 1269 jobject obj = NULL; 1270 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1271 1272 instanceOop i = alloc_object(clazz, CHECK_NULL); 1273 obj = JNIHandles::make_local(env, i); 1274 va_list args; 1275 va_start(args, methodID); 1276 JavaValue jvalue(T_VOID); 1277 JNI_ArgumentPusherVaArg ap(methodID, args); 1278 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1279 va_end(args); 1280 return obj; 1281 JNI_END 1282 1283 1284 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1285 JNIWrapper("GetObjectClass"); 1286 1287 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1288 1289 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1290 jclass ret = 1291 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1292 1293 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1294 return ret; 1295 JNI_END 1296 1297 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1298 JNIWrapper("IsInstanceOf"); 1299 1300 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1301 1302 jboolean ret = JNI_TRUE; 1303 if (obj != NULL) { 1304 ret = JNI_FALSE; 1305 Klass* k = java_lang_Class::as_Klass( 1306 JNIHandles::resolve_non_null(clazz)); 1307 if (k != NULL) { 1308 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1309 } 1310 } 1311 1312 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1313 return ret; 1314 JNI_END 1315 1316 1317 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1318 const char *sig, bool is_static, TRAPS) { 1319 // %%%% This code should probably just call into a method in the LinkResolver 1320 // 1321 // The class should have been loaded (we have an instance of the class 1322 // passed in) so the method and signature should already be in the symbol 1323 // table. If they're not there, the method doesn't exist. 1324 const char *name_to_probe = (name_str == NULL) 1325 ? vmSymbols::object_initializer_name()->as_C_string() 1326 : name_str; 1327 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1328 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1329 1330 if (name == NULL || signature == NULL) { 1331 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1332 } 1333 1334 // Throw a NoSuchMethodError exception if we have an instance of a 1335 // primitive java.lang.Class 1336 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1337 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1338 } 1339 1340 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 1341 1342 // Make sure class is linked and initialized before handing id's out to 1343 // Method*s. 1344 klass->initialize(CHECK_NULL); 1345 1346 Method* m; 1347 if (name == vmSymbols::object_initializer_name() || 1348 name == vmSymbols::class_initializer_name()) { 1349 // Never search superclasses for constructors 1350 if (klass->is_instance_klass()) { 1351 m = InstanceKlass::cast(klass)->find_method(name, signature); 1352 } else { 1353 m = NULL; 1354 } 1355 } else { 1356 m = klass->lookup_method(name, signature); 1357 if (m == NULL && klass->is_instance_klass()) { 1358 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature); 1359 } 1360 } 1361 if (m == NULL || (m->is_static() != is_static)) { 1362 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1363 } 1364 return m->jmethod_id(); 1365 } 1366 1367 1368 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1369 const char *name, const char *sig)) 1370 JNIWrapper("GetMethodID"); 1371 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1372 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1373 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1374 return ret; 1375 JNI_END 1376 1377 1378 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1379 const char *name, const char *sig)) 1380 JNIWrapper("GetStaticMethodID"); 1381 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1382 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1383 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1384 return ret; 1385 JNI_END 1386 1387 1388 1389 // 1390 // Calling Methods 1391 // 1392 1393 1394 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1395 , EntryProbe, ReturnProbe) \ 1396 \ 1397 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1398 , ReturnProbe); \ 1399 \ 1400 JNI_ENTRY(ResultType, \ 1401 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1402 JNIWrapper("Call" XSTR(Result) "Method"); \ 1403 \ 1404 EntryProbe; \ 1405 ResultType ret = 0;\ 1406 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1407 (const ResultType&)ret);\ 1408 \ 1409 va_list args; \ 1410 va_start(args, methodID); \ 1411 JavaValue jvalue(Tag); \ 1412 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1413 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1414 va_end(args); \ 1415 ret = jvalue.get_##ResultType(); \ 1416 return ret;\ 1417 JNI_END 1418 1419 // the runtime type of subword integral basic types is integer 1420 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1421 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1422 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1423 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1424 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1425 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1426 DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1427 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1428 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1429 DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1430 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1431 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1432 1433 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1434 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1435 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1436 DEFINE_CALLMETHOD(jint, Int, T_INT, 1437 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1438 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1439 DEFINE_CALLMETHOD(jlong, Long, T_LONG 1440 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1441 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1442 // Float and double probes don't return value because dtrace doesn't currently support it 1443 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1444 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1445 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1446 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1447 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1448 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1449 1450 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1451 , EntryProbe, ReturnProbe) \ 1452 \ 1453 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1454 , ReturnProbe); \ 1455 \ 1456 JNI_ENTRY(ResultType, \ 1457 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1458 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1459 \ 1460 EntryProbe;\ 1461 ResultType ret = 0;\ 1462 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1463 (const ResultType&)ret);\ 1464 \ 1465 JavaValue jvalue(Tag); \ 1466 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1467 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1468 ret = jvalue.get_##ResultType(); \ 1469 return ret;\ 1470 JNI_END 1471 1472 // the runtime type of subword integral basic types is integer 1473 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1474 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1475 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1476 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1477 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1478 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1479 DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1480 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1481 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1482 DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1483 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1484 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1485 1486 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1487 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1488 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1489 DEFINE_CALLMETHODV(jint, Int, T_INT, 1490 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1491 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1492 DEFINE_CALLMETHODV(jlong, Long, T_LONG 1493 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1494 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1495 // Float and double probes don't return value because dtrace doesn't currently support it 1496 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1497 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1498 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1499 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1500 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1501 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1502 1503 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1504 , EntryProbe, ReturnProbe) \ 1505 \ 1506 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1507 , ReturnProbe); \ 1508 \ 1509 JNI_ENTRY(ResultType, \ 1510 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1511 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1512 EntryProbe; \ 1513 ResultType ret = 0;\ 1514 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1515 (const ResultType&)ret);\ 1516 \ 1517 JavaValue jvalue(Tag); \ 1518 JNI_ArgumentPusherArray ap(methodID, args); \ 1519 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1520 ret = jvalue.get_##ResultType(); \ 1521 return ret;\ 1522 JNI_END 1523 1524 // the runtime type of subword integral basic types is integer 1525 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1526 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1527 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1528 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1529 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1530 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1531 DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1532 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1533 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1534 DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1535 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1537 1538 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1539 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1540 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1541 DEFINE_CALLMETHODA(jint, Int, T_INT, 1542 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1543 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1544 DEFINE_CALLMETHODA(jlong, Long, T_LONG 1545 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1546 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1547 // Float and double probes don't return value because dtrace doesn't currently support it 1548 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1549 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1550 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1551 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1552 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1553 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1554 1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1558 1559 1560 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1561 JNIWrapper("CallVoidMethod"); 1562 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1563 DT_VOID_RETURN_MARK(CallVoidMethod); 1564 1565 va_list args; 1566 va_start(args, methodID); 1567 JavaValue jvalue(T_VOID); 1568 JNI_ArgumentPusherVaArg ap(methodID, args); 1569 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1570 va_end(args); 1571 JNI_END 1572 1573 1574 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1575 JNIWrapper("CallVoidMethodV"); 1576 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1577 DT_VOID_RETURN_MARK(CallVoidMethodV); 1578 1579 JavaValue jvalue(T_VOID); 1580 JNI_ArgumentPusherVaArg ap(methodID, args); 1581 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1582 JNI_END 1583 1584 1585 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1586 JNIWrapper("CallVoidMethodA"); 1587 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1588 DT_VOID_RETURN_MARK(CallVoidMethodA); 1589 1590 JavaValue jvalue(T_VOID); 1591 JNI_ArgumentPusherArray ap(methodID, args); 1592 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1593 JNI_END 1594 1595 1596 1597 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1598 , EntryProbe, ReturnProbe) \ 1599 \ 1600 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1601 , ReturnProbe);\ 1602 \ 1603 JNI_ENTRY(ResultType, \ 1604 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1605 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1606 \ 1607 EntryProbe;\ 1608 ResultType ret;\ 1609 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1610 (const ResultType&)ret);\ 1611 \ 1612 va_list args; \ 1613 va_start(args, methodID); \ 1614 JavaValue jvalue(Tag); \ 1615 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1616 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1617 va_end(args); \ 1618 ret = jvalue.get_##ResultType(); \ 1619 return ret;\ 1620 JNI_END 1621 1622 // the runtime type of subword integral basic types is integer 1623 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1624 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1625 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1626 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1627 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1628 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1629 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1630 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1631 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1632 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1633 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1634 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1635 1636 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1637 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1638 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1639 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1640 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1641 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1642 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1643 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1644 // Float and double probes don't return value because dtrace doesn't currently support it 1645 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1646 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1647 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1648 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1649 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1650 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1651 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1652 1653 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1654 , EntryProbe, ReturnProbe) \ 1655 \ 1656 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1657 , ReturnProbe);\ 1658 \ 1659 JNI_ENTRY(ResultType, \ 1660 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1661 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1662 \ 1663 EntryProbe;\ 1664 ResultType ret;\ 1665 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1666 (const ResultType&)ret);\ 1667 \ 1668 JavaValue jvalue(Tag); \ 1669 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1670 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1671 ret = jvalue.get_##ResultType(); \ 1672 return ret;\ 1673 JNI_END 1674 1675 // the runtime type of subword integral basic types is integer 1676 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1677 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1678 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1679 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1680 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1681 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1682 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1683 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1684 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1685 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1686 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1687 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1688 1689 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1690 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1691 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1692 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1693 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1694 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1695 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1696 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1697 // Float and double probes don't return value because dtrace doesn't currently support it 1698 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1699 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1700 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1701 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1702 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1703 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1704 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1705 1706 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1707 , EntryProbe, ReturnProbe) \ 1708 \ 1709 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1710 , ReturnProbe);\ 1711 \ 1712 JNI_ENTRY(ResultType, \ 1713 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1714 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1715 \ 1716 EntryProbe;\ 1717 ResultType ret;\ 1718 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1719 (const ResultType&)ret);\ 1720 \ 1721 JavaValue jvalue(Tag); \ 1722 JNI_ArgumentPusherArray ap(methodID, args); \ 1723 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1724 ret = jvalue.get_##ResultType(); \ 1725 return ret;\ 1726 JNI_END 1727 1728 // the runtime type of subword integral basic types is integer 1729 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1730 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1731 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1732 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1733 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1734 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1735 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1736 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1737 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1738 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1739 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1740 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1741 1742 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1743 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1744 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1745 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1746 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1747 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1748 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1749 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1750 // Float and double probes don't return value because dtrace doesn't currently support it 1751 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1752 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1753 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1754 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1755 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1756 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1757 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1758 1759 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1760 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1765 1766 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1767 JNIWrapper("CallNonvirtualVoidMethod"); 1768 1769 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1770 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1771 1772 va_list args; 1773 va_start(args, methodID); 1774 JavaValue jvalue(T_VOID); 1775 JNI_ArgumentPusherVaArg ap(methodID, args); 1776 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1777 va_end(args); 1778 JNI_END 1779 1780 1781 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1782 JNIWrapper("CallNonvirtualVoidMethodV"); 1783 1784 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1785 env, obj, cls, (uintptr_t) methodID); 1786 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1787 1788 JavaValue jvalue(T_VOID); 1789 JNI_ArgumentPusherVaArg ap(methodID, args); 1790 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1791 JNI_END 1792 1793 1794 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1795 JNIWrapper("CallNonvirtualVoidMethodA"); 1796 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1797 env, obj, cls, (uintptr_t) methodID); 1798 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1799 JavaValue jvalue(T_VOID); 1800 JNI_ArgumentPusherArray ap(methodID, args); 1801 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1802 JNI_END 1803 1804 1805 1806 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1807 , EntryProbe, ResultProbe) \ 1808 \ 1809 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1810 , ResultProbe); \ 1811 \ 1812 JNI_ENTRY(ResultType, \ 1813 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1814 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1815 \ 1816 EntryProbe; \ 1817 ResultType ret = 0;\ 1818 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1819 (const ResultType&)ret);\ 1820 \ 1821 va_list args; \ 1822 va_start(args, methodID); \ 1823 JavaValue jvalue(Tag); \ 1824 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1825 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1826 va_end(args); \ 1827 ret = jvalue.get_##ResultType(); \ 1828 return ret;\ 1829 JNI_END 1830 1831 // the runtime type of subword integral basic types is integer 1832 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1833 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1834 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1835 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1836 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1837 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1838 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1839 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1840 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1841 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1842 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1843 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1844 1845 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1846 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1847 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1848 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1849 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1850 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1851 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1852 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1853 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1854 // Float and double probes don't return value because dtrace doesn't currently support it 1855 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1856 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1857 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1858 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1859 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1860 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1861 1862 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1863 , EntryProbe, ResultProbe) \ 1864 \ 1865 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1866 , ResultProbe); \ 1867 \ 1868 JNI_ENTRY(ResultType, \ 1869 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1870 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1871 \ 1872 EntryProbe; \ 1873 ResultType ret = 0;\ 1874 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1875 (const ResultType&)ret);\ 1876 \ 1877 JavaValue jvalue(Tag); \ 1878 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1879 /* Make sure class is initialized before trying to invoke its method */ \ 1880 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \ 1881 k->initialize(CHECK_0); \ 1882 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1883 va_end(args); \ 1884 ret = jvalue.get_##ResultType(); \ 1885 return ret;\ 1886 JNI_END 1887 1888 // the runtime type of subword integral basic types is integer 1889 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1890 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1891 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1892 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1893 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1894 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1895 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1896 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1897 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1898 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1899 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1900 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1901 1902 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1903 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1904 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1905 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1906 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1907 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1908 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1909 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1910 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1911 // Float and double probes don't return value because dtrace doesn't currently support it 1912 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1913 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1914 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1915 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1916 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1917 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1918 1919 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1920 , EntryProbe, ResultProbe) \ 1921 \ 1922 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1923 , ResultProbe); \ 1924 \ 1925 JNI_ENTRY(ResultType, \ 1926 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1927 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1928 \ 1929 EntryProbe; \ 1930 ResultType ret = 0;\ 1931 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1932 (const ResultType&)ret);\ 1933 \ 1934 JavaValue jvalue(Tag); \ 1935 JNI_ArgumentPusherArray ap(methodID, args); \ 1936 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1937 ret = jvalue.get_##ResultType(); \ 1938 return ret;\ 1939 JNI_END 1940 1941 // the runtime type of subword integral basic types is integer 1942 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1943 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1944 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1945 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1946 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1947 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1948 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1949 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1950 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1951 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1952 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1953 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1954 1955 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1956 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1957 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1958 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1959 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1960 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1961 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1962 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1963 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1964 // Float and double probes don't return value because dtrace doesn't currently support it 1965 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1966 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1967 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1968 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1969 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1970 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1971 1972 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1973 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1978 1979 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1980 JNIWrapper("CallStaticVoidMethod"); 1981 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1982 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1983 1984 va_list args; 1985 va_start(args, methodID); 1986 JavaValue jvalue(T_VOID); 1987 JNI_ArgumentPusherVaArg ap(methodID, args); 1988 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1989 va_end(args); 1990 JNI_END 1991 1992 1993 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1994 JNIWrapper("CallStaticVoidMethodV"); 1995 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1996 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1997 1998 JavaValue jvalue(T_VOID); 1999 JNI_ArgumentPusherVaArg ap(methodID, args); 2000 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2001 JNI_END 2002 2003 2004 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2005 JNIWrapper("CallStaticVoidMethodA"); 2006 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2007 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2008 2009 JavaValue jvalue(T_VOID); 2010 JNI_ArgumentPusherArray ap(methodID, args); 2011 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2012 JNI_END 2013 2014 2015 // 2016 // Accessing Fields 2017 // 2018 2019 2020 DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2021 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2022 2023 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2024 const char *name, const char *sig)) 2025 JNIWrapper("GetFieldID"); 2026 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2027 jfieldID ret = 0; 2028 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2029 2030 // The class should have been loaded (we have an instance of the class 2031 // passed in) so the field and signature should already be in the symbol 2032 // table. If they're not there, the field doesn't exist. 2033 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2034 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2035 if (fieldname == NULL || signame == NULL) { 2036 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2037 } 2038 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2039 // Make sure class is initialized before handing id's out to fields 2040 k->initialize(CHECK_NULL); 2041 2042 fieldDescriptor fd; 2043 if (!k->is_instance_klass() || 2044 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) { 2045 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2046 } 2047 2048 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2049 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2050 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset()); 2051 return ret; 2052 JNI_END 2053 2054 2055 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2056 JNIWrapper("GetObjectField"); 2057 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2058 oop o = JNIHandles::resolve_non_null(obj); 2059 Klass* k = o->klass(); 2060 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2061 // Keep JVMTI addition small and only check enabled flag here. 2062 // jni_GetField_probe() assumes that is okay to create handles. 2063 if (JvmtiExport::should_post_field_access()) { 2064 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2065 } 2066 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset); 2067 jobject ret = JNIHandles::make_local(env, loaded_obj); 2068 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2069 return ret; 2070 JNI_END 2071 2072 2073 2074 #define DEFINE_GETFIELD(Return,Fieldname,Result \ 2075 , EntryProbe, ReturnProbe) \ 2076 \ 2077 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2078 , ReturnProbe); \ 2079 \ 2080 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2081 JNIWrapper("Get" XSTR(Result) "Field"); \ 2082 \ 2083 EntryProbe; \ 2084 Return ret = 0;\ 2085 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2086 \ 2087 oop o = JNIHandles::resolve_non_null(obj); \ 2088 Klass* k = o->klass(); \ 2089 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2090 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2091 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2092 /* and creates a ResetNoHandleMark. */ \ 2093 if (JvmtiExport::should_post_field_access()) { \ 2094 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2095 } \ 2096 ret = o->Fieldname##_field(offset); \ 2097 return ret; \ 2098 JNI_END 2099 2100 DEFINE_GETFIELD(jboolean, bool, Boolean 2101 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2102 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2103 DEFINE_GETFIELD(jbyte, byte, Byte 2104 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2105 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2106 DEFINE_GETFIELD(jchar, char, Char 2107 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2108 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2109 DEFINE_GETFIELD(jshort, short, Short 2110 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2111 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2112 DEFINE_GETFIELD(jint, int, Int 2113 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2114 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2115 DEFINE_GETFIELD(jlong, long, Long 2116 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2117 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2118 // Float and double probes don't return value because dtrace doesn't currently support it 2119 DEFINE_GETFIELD(jfloat, float, Float 2120 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2121 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2122 DEFINE_GETFIELD(jdouble, double, Double 2123 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2124 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2125 2126 address jni_GetBooleanField_addr() { 2127 return (address)jni_GetBooleanField; 2128 } 2129 address jni_GetByteField_addr() { 2130 return (address)jni_GetByteField; 2131 } 2132 address jni_GetCharField_addr() { 2133 return (address)jni_GetCharField; 2134 } 2135 address jni_GetShortField_addr() { 2136 return (address)jni_GetShortField; 2137 } 2138 address jni_GetIntField_addr() { 2139 return (address)jni_GetIntField; 2140 } 2141 address jni_GetLongField_addr() { 2142 return (address)jni_GetLongField; 2143 } 2144 address jni_GetFloatField_addr() { 2145 return (address)jni_GetFloatField; 2146 } 2147 address jni_GetDoubleField_addr() { 2148 return (address)jni_GetDoubleField; 2149 } 2150 2151 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2152 JNIWrapper("SetObjectField"); 2153 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2154 oop o = JNIHandles::resolve_non_null(obj); 2155 Klass* k = o->klass(); 2156 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2157 // Keep JVMTI addition small and only check enabled flag here. 2158 // jni_SetField_probe_nh() assumes that is not okay to create handles 2159 // and creates a ResetNoHandleMark. 2160 if (JvmtiExport::should_post_field_modification()) { 2161 jvalue field_value; 2162 field_value.l = value; 2163 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2164 } 2165 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value)); 2166 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2167 JNI_END 2168 2169 2170 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2171 , EntryProbe, ReturnProbe) \ 2172 \ 2173 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2174 JNIWrapper("Set" XSTR(Result) "Field"); \ 2175 \ 2176 EntryProbe; \ 2177 \ 2178 oop o = JNIHandles::resolve_non_null(obj); \ 2179 Klass* k = o->klass(); \ 2180 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2181 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2182 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2183 /* and creates a ResetNoHandleMark. */ \ 2184 if (JvmtiExport::should_post_field_modification()) { \ 2185 jvalue field_value; \ 2186 field_value.unionType = value; \ 2187 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2188 } \ 2189 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2190 o->Fieldname##_field_put(offset, value); \ 2191 ReturnProbe; \ 2192 JNI_END 2193 2194 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2195 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2196 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2197 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2198 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2199 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2200 DEFINE_SETFIELD(jchar, char, Char, 'C', c 2201 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2202 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2203 DEFINE_SETFIELD(jshort, short, Short, 'S', s 2204 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2205 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2206 DEFINE_SETFIELD(jint, int, Int, 'I', i 2207 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2208 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2209 DEFINE_SETFIELD(jlong, long, Long, 'J', j 2210 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2211 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2212 // Float and double probes don't return value because dtrace doesn't currently support it 2213 DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2214 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2215 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2216 DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2217 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2218 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2219 2220 DT_RETURN_MARK_DECL(ToReflectedField, jobject 2221 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2222 2223 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2224 JNIWrapper("ToReflectedField"); 2225 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2226 jobject ret = NULL; 2227 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2228 2229 fieldDescriptor fd; 2230 bool found = false; 2231 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2232 2233 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2234 2235 if (isStatic) { 2236 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2237 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2238 assert(id->is_static_field_id(), "invalid static field id"); 2239 found = id->find_local_field(&fd); 2240 } else { 2241 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2242 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2243 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2244 } 2245 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2246 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2247 ret = JNIHandles::make_local(env, reflected); 2248 return ret; 2249 JNI_END 2250 2251 2252 // 2253 // Accessing Static Fields 2254 // 2255 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2256 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2257 2258 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2259 const char *name, const char *sig)) 2260 JNIWrapper("GetStaticFieldID"); 2261 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2262 jfieldID ret = NULL; 2263 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2264 2265 // The class should have been loaded (we have an instance of the class 2266 // passed in) so the field and signature should already be in the symbol 2267 // table. If they're not there, the field doesn't exist. 2268 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2269 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2270 if (fieldname == NULL || signame == NULL) { 2271 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2272 } 2273 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 2274 // Make sure class is initialized before handing id's out to static fields 2275 k->initialize(CHECK_NULL); 2276 2277 fieldDescriptor fd; 2278 if (!k->is_instance_klass() || 2279 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) { 2280 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2281 } 2282 2283 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2284 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2285 debug_only(id->set_is_static_field_id();) 2286 2287 debug_only(id->verify(fd.field_holder())); 2288 2289 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2290 return ret; 2291 JNI_END 2292 2293 2294 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2295 JNIWrapper("GetStaticObjectField"); 2296 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2297 #if INCLUDE_JNI_CHECK 2298 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2299 #endif // INCLUDE_JNI_CHECK 2300 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2301 assert(id->is_static_field_id(), "invalid static field id"); 2302 // Keep JVMTI addition small and only check enabled flag here. 2303 // jni_GetField_probe() assumes that is okay to create handles. 2304 if (JvmtiExport::should_post_field_access()) { 2305 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2306 } 2307 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2308 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2309 return ret; 2310 JNI_END 2311 2312 2313 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2314 , EntryProbe, ReturnProbe) \ 2315 \ 2316 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2317 , ReturnProbe); \ 2318 \ 2319 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2320 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2321 EntryProbe; \ 2322 Return ret = 0;\ 2323 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2324 (const Return&)ret);\ 2325 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2326 assert(id->is_static_field_id(), "invalid static field id"); \ 2327 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2328 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2329 if (JvmtiExport::should_post_field_access()) { \ 2330 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2331 } \ 2332 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2333 return ret;\ 2334 JNI_END 2335 2336 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2337 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2338 DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2339 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2340 DEFINE_GETSTATICFIELD(jchar, char, Char 2341 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2342 DEFINE_GETSTATICFIELD(jshort, short, Short 2343 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2344 DEFINE_GETSTATICFIELD(jint, int, Int 2345 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2346 DEFINE_GETSTATICFIELD(jlong, long, Long 2347 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2348 // Float and double probes don't return value because dtrace doesn't currently support it 2349 DEFINE_GETSTATICFIELD(jfloat, float, Float 2350 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2351 DEFINE_GETSTATICFIELD(jdouble, double, Double 2352 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2353 2354 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2355 JNIWrapper("SetStaticObjectField"); 2356 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2357 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2358 assert(id->is_static_field_id(), "invalid static field id"); 2359 // Keep JVMTI addition small and only check enabled flag here. 2360 // jni_SetField_probe() assumes that is okay to create handles. 2361 if (JvmtiExport::should_post_field_modification()) { 2362 jvalue field_value; 2363 field_value.l = value; 2364 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2365 } 2366 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2367 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2368 JNI_END 2369 2370 2371 2372 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2373 , EntryProbe, ReturnProbe) \ 2374 \ 2375 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2376 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2377 EntryProbe; \ 2378 \ 2379 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2380 assert(id->is_static_field_id(), "invalid static field id"); \ 2381 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2382 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2383 if (JvmtiExport::should_post_field_modification()) { \ 2384 jvalue field_value; \ 2385 field_value.unionType = value; \ 2386 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2387 } \ 2388 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2389 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2390 ReturnProbe;\ 2391 JNI_END 2392 2393 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2394 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2395 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2396 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2397 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2398 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2399 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2400 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2401 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2402 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2403 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2404 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2405 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2406 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2407 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2408 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2409 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2410 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2411 // Float and double probes don't return value because dtrace doesn't currently support it 2412 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2413 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2414 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2415 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2416 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2417 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2418 2419 // 2420 // String Operations 2421 // 2422 2423 // Unicode Interface 2424 2425 DT_RETURN_MARK_DECL(NewString, jstring 2426 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2427 2428 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2429 JNIWrapper("NewString"); 2430 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2431 jstring ret = NULL; 2432 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2433 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2434 ret = (jstring) JNIHandles::make_local(env, string); 2435 return ret; 2436 JNI_END 2437 2438 2439 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2440 JNIWrapper("GetStringLength"); 2441 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2442 jsize ret = 0; 2443 oop s = JNIHandles::resolve_non_null(string); 2444 if (java_lang_String::value(s) != NULL) { 2445 ret = java_lang_String::length(s); 2446 } 2447 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2448 return ret; 2449 JNI_END 2450 2451 2452 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2453 JNIEnv *env, jstring string, jboolean *isCopy)) 2454 JNIWrapper("GetStringChars"); 2455 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2456 jchar* buf = NULL; 2457 oop s = JNIHandles::resolve_non_null(string); 2458 typeArrayOop s_value = java_lang_String::value(s); 2459 if (s_value != NULL) { 2460 int s_len = java_lang_String::length(s); 2461 bool is_latin1 = java_lang_String::is_latin1(s); 2462 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2463 /* JNI Specification states return NULL on OOM */ 2464 if (buf != NULL) { 2465 if (s_len > 0) { 2466 if (!is_latin1) { 2467 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2468 } else { 2469 for (int i = 0; i < s_len; i++) { 2470 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2471 } 2472 } 2473 } 2474 buf[s_len] = 0; 2475 //%note jni_5 2476 if (isCopy != NULL) { 2477 *isCopy = JNI_TRUE; 2478 } 2479 } 2480 } 2481 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2482 return buf; 2483 JNI_END 2484 2485 2486 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2487 JNIWrapper("ReleaseStringChars"); 2488 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2489 //%note jni_6 2490 if (chars != NULL) { 2491 // Since String objects are supposed to be immutable, don't copy any 2492 // new data back. A bad user will have to go after the char array. 2493 FreeHeap((void*) chars); 2494 } 2495 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2496 JNI_END 2497 2498 2499 // UTF Interface 2500 2501 DT_RETURN_MARK_DECL(NewStringUTF, jstring 2502 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2503 2504 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2505 JNIWrapper("NewStringUTF"); 2506 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2507 jstring ret; 2508 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2509 2510 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2511 ret = (jstring) JNIHandles::make_local(env, result); 2512 return ret; 2513 JNI_END 2514 2515 2516 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2517 JNIWrapper("GetStringUTFLength"); 2518 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2519 jsize ret = 0; 2520 oop java_string = JNIHandles::resolve_non_null(string); 2521 if (java_lang_String::value(java_string) != NULL) { 2522 ret = java_lang_String::utf8_length(java_string); 2523 } 2524 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2525 return ret; 2526 JNI_END 2527 2528 2529 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2530 JNIWrapper("GetStringUTFChars"); 2531 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2532 char* result = NULL; 2533 oop java_string = JNIHandles::resolve_non_null(string); 2534 if (java_lang_String::value(java_string) != NULL) { 2535 size_t length = java_lang_String::utf8_length(java_string); 2536 /* JNI Specification states return NULL on OOM */ 2537 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2538 if (result != NULL) { 2539 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2540 if (isCopy != NULL) { 2541 *isCopy = JNI_TRUE; 2542 } 2543 } 2544 } 2545 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2546 return result; 2547 JNI_END 2548 2549 2550 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2551 JNIWrapper("ReleaseStringUTFChars"); 2552 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2553 if (chars != NULL) { 2554 FreeHeap((char*) chars); 2555 } 2556 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2557 JNI_END 2558 2559 2560 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2561 JNIWrapper("GetArrayLength"); 2562 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2563 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2564 assert(a->is_array(), "must be array"); 2565 jsize ret = a->length(); 2566 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2567 return ret; 2568 JNI_END 2569 2570 2571 // 2572 // Object Array Operations 2573 // 2574 2575 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2576 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2577 2578 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2579 JNIWrapper("NewObjectArray"); 2580 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2581 jobjectArray ret = NULL; 2582 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2583 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)); 2584 Klass* ak = ek->array_klass(CHECK_NULL); 2585 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL); 2586 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL); 2587 oop initial_value = JNIHandles::resolve(initialElement); 2588 if (initial_value != NULL) { // array already initialized with NULL 2589 for (int index = 0; index < length; index++) { 2590 result->obj_at_put(index, initial_value); 2591 } 2592 } 2593 ret = (jobjectArray) JNIHandles::make_local(env, result); 2594 return ret; 2595 JNI_END 2596 2597 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2598 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2599 2600 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2601 JNIWrapper("GetObjectArrayElement"); 2602 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2603 jobject ret = NULL; 2604 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2605 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2606 if (a->is_within_bounds(index)) { 2607 ret = JNIHandles::make_local(env, a->obj_at(index)); 2608 return ret; 2609 } else { 2610 char buf[jintAsStringSize]; 2611 sprintf(buf, "%d", index); 2612 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2613 } 2614 JNI_END 2615 2616 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2617 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2618 2619 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2620 JNIWrapper("SetObjectArrayElement"); 2621 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2622 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2623 2624 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2625 oop v = JNIHandles::resolve(value); 2626 if (a->is_within_bounds(index)) { 2627 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2628 a->obj_at_put(index, v); 2629 } else { 2630 THROW(vmSymbols::java_lang_ArrayStoreException()); 2631 } 2632 } else { 2633 char buf[jintAsStringSize]; 2634 sprintf(buf, "%d", index); 2635 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2636 } 2637 JNI_END 2638 2639 2640 2641 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2642 ,EntryProbe,ReturnProbe) \ 2643 \ 2644 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2645 , ReturnProbe); \ 2646 \ 2647 JNI_ENTRY(Return, \ 2648 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2649 JNIWrapper("New" XSTR(Result) "Array"); \ 2650 EntryProbe; \ 2651 Return ret = NULL;\ 2652 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2653 \ 2654 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2655 ret = (Return) JNIHandles::make_local(env, obj); \ 2656 return ret;\ 2657 JNI_END 2658 2659 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2660 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2661 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2662 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2663 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2664 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2665 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2666 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2667 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2668 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2669 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2670 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2671 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2672 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2673 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2674 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2675 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2676 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2677 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2678 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2679 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2680 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2681 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2682 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2683 2684 // Return an address which will fault if the caller writes to it. 2685 2686 static char* get_bad_address() { 2687 static char* bad_address = NULL; 2688 if (bad_address == NULL) { 2689 size_t size = os::vm_allocation_granularity(); 2690 bad_address = os::reserve_memory(size); 2691 if (bad_address != NULL) { 2692 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2693 /*is_committed*/false); 2694 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2695 } 2696 } 2697 return bad_address; 2698 } 2699 2700 2701 2702 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2703 , EntryProbe, ReturnProbe) \ 2704 \ 2705 JNI_QUICK_ENTRY(ElementType*, \ 2706 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2707 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2708 EntryProbe; \ 2709 /* allocate an chunk of memory in c land */ \ 2710 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2711 ElementType* result; \ 2712 int len = a->length(); \ 2713 if (len == 0) { \ 2714 /* Empty array: legal but useless, can't return NULL. \ 2715 * Return a pointer to something useless. \ 2716 * Avoid asserts in typeArrayOop. */ \ 2717 result = (ElementType*)get_bad_address(); \ 2718 } else { \ 2719 /* JNI Specification states return NULL on OOM */ \ 2720 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2721 if (result != NULL) { \ 2722 /* copy the array to the c chunk */ \ 2723 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2724 if (isCopy) { \ 2725 *isCopy = JNI_TRUE; \ 2726 } \ 2727 } \ 2728 } \ 2729 ReturnProbe; \ 2730 return result; \ 2731 JNI_END 2732 2733 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2734 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2735 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2736 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2737 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2738 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2739 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2740 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2741 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2742 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2743 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2744 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2745 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2746 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2747 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2748 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2749 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2750 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2751 // Float and double probes don't return value because dtrace doesn't currently support it 2752 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2753 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2754 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2755 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2756 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2757 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2758 2759 2760 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2761 , EntryProbe, ReturnProbe);\ 2762 \ 2763 JNI_QUICK_ENTRY(void, \ 2764 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2765 ElementType *buf, jint mode)) \ 2766 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2767 EntryProbe; \ 2768 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2769 int len = a->length(); \ 2770 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2771 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2772 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2773 } \ 2774 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2775 FreeHeap(buf); \ 2776 } \ 2777 } \ 2778 ReturnProbe; \ 2779 JNI_END 2780 2781 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2782 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2783 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2784 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2785 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2786 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2787 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2788 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2789 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2791 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2792 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2794 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2795 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2797 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2798 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2800 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2801 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2803 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2804 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2805 2806 2807 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2808 , EntryProbe, ReturnProbe); \ 2809 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2810 , ReturnProbe); \ 2811 \ 2812 JNI_ENTRY(void, \ 2813 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2814 jsize len, ElementType *buf)) \ 2815 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2816 EntryProbe; \ 2817 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2818 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2819 if (start < 0 || len < 0 || (start > src->length() - len)) { \ 2820 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2821 } else { \ 2822 if (len > 0) { \ 2823 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2824 memcpy((u_char*) buf, \ 2825 (u_char*) src->Tag##_at_addr(start), \ 2826 len << sc); \ 2827 } \ 2828 } \ 2829 JNI_END 2830 2831 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2832 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2833 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2834 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2835 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2836 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2837 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2838 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2839 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2840 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2841 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2842 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2843 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2844 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2845 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2846 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2847 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2848 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2849 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2850 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2851 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2852 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2853 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2854 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2855 2856 2857 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2858 , EntryProbe, ReturnProbe); \ 2859 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2860 ,ReturnProbe); \ 2861 \ 2862 JNI_ENTRY(void, \ 2863 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2864 jsize len, const ElementType *buf)) \ 2865 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2866 EntryProbe; \ 2867 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2868 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2869 if (start < 0 || len < 0 || (start > dst->length() - len)) { \ 2870 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2871 } else { \ 2872 if (len > 0) { \ 2873 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2874 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2875 (u_char*) buf, \ 2876 len << sc); \ 2877 } \ 2878 } \ 2879 JNI_END 2880 2881 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2882 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2883 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2884 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2885 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2886 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2887 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2888 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2889 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2890 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2891 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2892 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2893 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2894 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2895 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2896 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2897 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2898 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2899 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2900 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2901 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2902 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2903 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2904 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2905 2906 2907 // 2908 // Interception of natives 2909 // 2910 2911 // The RegisterNatives call being attempted tried to register with a method that 2912 // is not native. Ask JVM TI what prefixes have been specified. Then check 2913 // to see if the native method is now wrapped with the prefixes. See the 2914 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2915 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) { 2916 #if INCLUDE_JVMTI 2917 ResourceMark rm(THREAD); 2918 Method* method; 2919 int name_len = name->utf8_length(); 2920 char* name_str = name->as_utf8(); 2921 int prefix_count; 2922 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2923 for (int i = 0; i < prefix_count; i++) { 2924 char* prefix = prefixes[i]; 2925 int prefix_len = (int)strlen(prefix); 2926 2927 // try adding this prefix to the method name and see if it matches another method name 2928 int trial_len = name_len + prefix_len; 2929 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2930 strcpy(trial_name_str, prefix); 2931 strcat(trial_name_str, name_str); 2932 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2933 if (trial_name == NULL) { 2934 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2935 } 2936 method = k->lookup_method(trial_name, signature); 2937 if (method == NULL) { 2938 continue; // signature doesn't match, try the next prefix 2939 } 2940 if (method->is_native()) { 2941 method->set_is_prefixed_native(); 2942 return method; // wahoo, we found a prefixed version of the method, return it 2943 } 2944 // found as non-native, so prefix is good, add it, probably just need more prefixes 2945 name_len = trial_len; 2946 name_str = trial_name_str; 2947 } 2948 #endif // INCLUDE_JVMTI 2949 return NULL; // not found 2950 } 2951 2952 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2953 Method* method = k->lookup_method(name, signature); 2954 if (method == NULL) { 2955 ResourceMark rm; 2956 stringStream st; 2957 st.print("Method %s name or signature does not match", 2958 Method::name_and_sig_as_C_string(k, name, signature)); 2959 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2960 } 2961 if (!method->is_native()) { 2962 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2963 method = find_prefixed_native(k, name, signature, THREAD); 2964 if (method == NULL) { 2965 ResourceMark rm; 2966 stringStream st; 2967 st.print("Method %s is not declared as native", 2968 Method::name_and_sig_as_C_string(k, name, signature)); 2969 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2970 } 2971 } 2972 2973 if (entry != NULL) { 2974 method->set_native_function(entry, 2975 Method::native_bind_event_is_interesting); 2976 } else { 2977 method->clear_native_function(); 2978 } 2979 if (PrintJNIResolving) { 2980 ResourceMark rm(THREAD); 2981 tty->print_cr("[Registering JNI native method %s.%s]", 2982 method->method_holder()->external_name(), 2983 method->name()->as_C_string()); 2984 } 2985 return true; 2986 } 2987 2988 DT_RETURN_MARK_DECL(RegisterNatives, jint 2989 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 2990 2991 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2992 const JNINativeMethod *methods, 2993 jint nMethods)) 2994 JNIWrapper("RegisterNatives"); 2995 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 2996 jint ret = 0; 2997 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2998 2999 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3000 3001 for (int index = 0; index < nMethods; index++) { 3002 const char* meth_name = methods[index].name; 3003 const char* meth_sig = methods[index].signature; 3004 int meth_name_len = (int)strlen(meth_name); 3005 3006 // The class should have been loaded (we have an instance of the class 3007 // passed in) so the method and signature should already be in the symbol 3008 // table. If they're not there, the method doesn't exist. 3009 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3010 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3011 3012 if (name == NULL || signature == NULL) { 3013 ResourceMark rm; 3014 stringStream st; 3015 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig); 3016 // Must return negative value on failure 3017 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3018 } 3019 3020 bool res = register_native(k, name, signature, 3021 (address) methods[index].fnPtr, THREAD); 3022 if (!res) { 3023 ret = -1; 3024 break; 3025 } 3026 } 3027 return ret; 3028 JNI_END 3029 3030 3031 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3032 JNIWrapper("UnregisterNatives"); 3033 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3034 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3035 //%note jni_2 3036 if (k->is_instance_klass()) { 3037 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3038 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3039 if (m->is_native()) { 3040 m->clear_native_function(); 3041 m->set_signature_handler(NULL); 3042 } 3043 } 3044 } 3045 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3046 return 0; 3047 JNI_END 3048 3049 // 3050 // Monitor functions 3051 // 3052 3053 DT_RETURN_MARK_DECL(MonitorEnter, jint 3054 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3055 3056 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3057 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3058 jint ret = JNI_ERR; 3059 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3060 3061 // If the object is null, we can't do anything with it 3062 if (jobj == NULL) { 3063 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3064 } 3065 3066 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3067 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3068 ret = JNI_OK; 3069 return ret; 3070 JNI_END 3071 3072 DT_RETURN_MARK_DECL(MonitorExit, jint 3073 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3074 3075 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3076 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3077 jint ret = JNI_ERR; 3078 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3079 3080 // Don't do anything with a null object 3081 if (jobj == NULL) { 3082 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3083 } 3084 3085 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3086 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3087 3088 ret = JNI_OK; 3089 return ret; 3090 JNI_END 3091 3092 // 3093 // Extensions 3094 // 3095 3096 DT_VOID_RETURN_MARK_DECL(GetStringRegion 3097 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3098 3099 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3100 JNIWrapper("GetStringRegion"); 3101 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3102 DT_VOID_RETURN_MARK(GetStringRegion); 3103 oop s = JNIHandles::resolve_non_null(string); 3104 int s_len = java_lang_String::length(s); 3105 if (start < 0 || len < 0 || start > s_len - len) { 3106 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3107 } else { 3108 if (len > 0) { 3109 typeArrayOop s_value = java_lang_String::value(s); 3110 bool is_latin1 = java_lang_String::is_latin1(s); 3111 if (!is_latin1) { 3112 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3113 } else { 3114 for (int i = 0; i < len; i++) { 3115 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3116 } 3117 } 3118 } 3119 } 3120 JNI_END 3121 3122 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3123 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3124 3125 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3126 JNIWrapper("GetStringUTFRegion"); 3127 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3128 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3129 oop s = JNIHandles::resolve_non_null(string); 3130 int s_len = java_lang_String::length(s); 3131 if (start < 0 || len < 0 || start > s_len - len) { 3132 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3133 } else { 3134 //%note jni_7 3135 if (len > 0) { 3136 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3137 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3138 // as_utf8_string null-terminates the result string 3139 } else { 3140 // JDK null-terminates the buffer even in len is zero 3141 if (buf != NULL) { 3142 buf[0] = 0; 3143 } 3144 } 3145 } 3146 JNI_END 3147 3148 3149 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3150 JNIWrapper("GetPrimitiveArrayCritical"); 3151 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3152 GCLocker::lock_critical(thread); 3153 if (isCopy != NULL) { 3154 *isCopy = JNI_FALSE; 3155 } 3156 oop a = JNIHandles::resolve_non_null(array); 3157 assert(a->is_array(), "just checking"); 3158 BasicType type; 3159 if (a->is_objArray()) { 3160 type = T_OBJECT; 3161 } else { 3162 type = TypeArrayKlass::cast(a->klass())->element_type(); 3163 } 3164 void* ret = arrayOop(a)->base(type); 3165 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3166 return ret; 3167 JNI_END 3168 3169 3170 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3171 JNIWrapper("ReleasePrimitiveArrayCritical"); 3172 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3173 // The array, carray and mode arguments are ignored 3174 GCLocker::unlock_critical(thread); 3175 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3176 JNI_END 3177 3178 3179 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3180 JNIWrapper("GetStringCritical"); 3181 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3182 GCLocker::lock_critical(thread); 3183 oop s = JNIHandles::resolve_non_null(string); 3184 typeArrayOop s_value = java_lang_String::value(s); 3185 bool is_latin1 = java_lang_String::is_latin1(s); 3186 if (isCopy != NULL) { 3187 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3188 } 3189 jchar* ret; 3190 if (!is_latin1) { 3191 ret = (jchar*) s_value->base(T_CHAR); 3192 } else { 3193 // Inflate latin1 encoded string to UTF16 3194 int s_len = java_lang_String::length(s); 3195 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3196 /* JNI Specification states return NULL on OOM */ 3197 if (ret != NULL) { 3198 for (int i = 0; i < s_len; i++) { 3199 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3200 } 3201 ret[s_len] = 0; 3202 } 3203 } 3204 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3205 return ret; 3206 JNI_END 3207 3208 3209 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3210 JNIWrapper("ReleaseStringCritical"); 3211 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3212 // The str and chars arguments are ignored for UTF16 strings 3213 oop s = JNIHandles::resolve_non_null(str); 3214 bool is_latin1 = java_lang_String::is_latin1(s); 3215 if (is_latin1) { 3216 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3217 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3218 FREE_C_HEAP_ARRAY(jchar, chars); 3219 } 3220 GCLocker::unlock_critical(thread); 3221 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3222 JNI_END 3223 3224 3225 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3226 JNIWrapper("jni_NewWeakGlobalRef"); 3227 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3228 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3229 jweak ret = JNIHandles::make_weak_global(ref_handle); 3230 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3231 return ret; 3232 JNI_END 3233 3234 // Must be JNI_ENTRY (with HandleMark) 3235 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3236 JNIWrapper("jni_DeleteWeakGlobalRef"); 3237 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3238 JNIHandles::destroy_weak_global(ref); 3239 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3240 JNI_END 3241 3242 3243 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3244 JNIWrapper("jni_ExceptionCheck"); 3245 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3246 jni_check_async_exceptions(thread); 3247 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3248 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3249 return ret; 3250 JNI_END 3251 3252 3253 // Initialization state for three routines below relating to 3254 // java.nio.DirectBuffers 3255 static int directBufferSupportInitializeStarted = 0; 3256 static volatile int directBufferSupportInitializeEnded = 0; 3257 static volatile int directBufferSupportInitializeFailed = 0; 3258 static jclass bufferClass = NULL; 3259 static jclass directBufferClass = NULL; 3260 static jclass directByteBufferClass = NULL; 3261 static jmethodID directByteBufferConstructor = NULL; 3262 static jfieldID directBufferAddressField = NULL; 3263 static jfieldID bufferCapacityField = NULL; 3264 3265 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3266 Handle loader; // null (bootstrap) loader 3267 Handle protection_domain; // null protection domain 3268 3269 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3270 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3271 3272 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3273 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3274 } 3275 return result; 3276 } 3277 3278 // These lookups are done with the NULL (bootstrap) ClassLoader to 3279 // circumvent any security checks that would be done by jni_FindClass. 3280 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3281 { 3282 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3283 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3284 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3285 return true; 3286 } 3287 JNI_END 3288 3289 3290 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3291 if (directBufferSupportInitializeFailed) { 3292 return false; 3293 } 3294 3295 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3296 if (!lookupDirectBufferClasses(env)) { 3297 directBufferSupportInitializeFailed = 1; 3298 return false; 3299 } 3300 3301 // Make global references for these 3302 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3303 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3304 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3305 3306 // Get needed field and method IDs 3307 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3308 if (env->ExceptionCheck()) { 3309 env->ExceptionClear(); 3310 directBufferSupportInitializeFailed = 1; 3311 return false; 3312 } 3313 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3314 if (env->ExceptionCheck()) { 3315 env->ExceptionClear(); 3316 directBufferSupportInitializeFailed = 1; 3317 return false; 3318 } 3319 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3320 if (env->ExceptionCheck()) { 3321 env->ExceptionClear(); 3322 directBufferSupportInitializeFailed = 1; 3323 return false; 3324 } 3325 3326 if ((directByteBufferConstructor == NULL) || 3327 (directBufferAddressField == NULL) || 3328 (bufferCapacityField == NULL)) { 3329 directBufferSupportInitializeFailed = 1; 3330 return false; 3331 } 3332 3333 directBufferSupportInitializeEnded = 1; 3334 } else { 3335 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3336 os::naked_yield(); 3337 } 3338 } 3339 3340 return !directBufferSupportInitializeFailed; 3341 } 3342 3343 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3344 { 3345 // thread_from_jni_environment() will block if VM is gone. 3346 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3347 3348 JNIWrapper("jni_NewDirectByteBuffer"); 3349 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3350 3351 if (!directBufferSupportInitializeEnded) { 3352 if (!initializeDirectBufferSupport(env, thread)) { 3353 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3354 return NULL; 3355 } 3356 } 3357 3358 // Being paranoid about accidental sign extension on address 3359 jlong addr = (jlong) ((uintptr_t) address); 3360 // NOTE that package-private DirectByteBuffer constructor currently 3361 // takes int capacity 3362 jint cap = (jint) capacity; 3363 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3364 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3365 return ret; 3366 } 3367 3368 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3369 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3370 3371 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3372 { 3373 // thread_from_jni_environment() will block if VM is gone. 3374 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3375 3376 JNIWrapper("jni_GetDirectBufferAddress"); 3377 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3378 void* ret = NULL; 3379 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3380 3381 if (!directBufferSupportInitializeEnded) { 3382 if (!initializeDirectBufferSupport(env, thread)) { 3383 return 0; 3384 } 3385 } 3386 3387 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3388 return 0; 3389 } 3390 3391 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3392 return ret; 3393 } 3394 3395 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3396 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3397 3398 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3399 { 3400 // thread_from_jni_environment() will block if VM is gone. 3401 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3402 3403 JNIWrapper("jni_GetDirectBufferCapacity"); 3404 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3405 jlong ret = -1; 3406 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3407 3408 if (!directBufferSupportInitializeEnded) { 3409 if (!initializeDirectBufferSupport(env, thread)) { 3410 ret = 0; 3411 return ret; 3412 } 3413 } 3414 3415 if (buf == NULL) { 3416 return -1; 3417 } 3418 3419 if (!env->IsInstanceOf(buf, directBufferClass)) { 3420 return -1; 3421 } 3422 3423 // NOTE that capacity is currently an int in the implementation 3424 ret = env->GetIntField(buf, bufferCapacityField); 3425 return ret; 3426 } 3427 3428 3429 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3430 JNIWrapper("GetVersion"); 3431 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3432 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3433 return CurrentVersion; 3434 JNI_END 3435 3436 extern struct JavaVM_ main_vm; 3437 3438 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3439 JNIWrapper("jni_GetJavaVM"); 3440 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3441 *vm = (JavaVM *)(&main_vm); 3442 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3443 return JNI_OK; 3444 JNI_END 3445 3446 3447 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3448 JNIWrapper("GetModule"); 3449 return Modules::get_module(clazz, THREAD); 3450 JNI_END 3451 3452 3453 // Structure containing all jni functions 3454 struct JNINativeInterface_ jni_NativeInterface = { 3455 NULL, 3456 NULL, 3457 NULL, 3458 3459 NULL, 3460 3461 jni_GetVersion, 3462 3463 jni_DefineClass, 3464 jni_FindClass, 3465 3466 jni_FromReflectedMethod, 3467 jni_FromReflectedField, 3468 3469 jni_ToReflectedMethod, 3470 3471 jni_GetSuperclass, 3472 jni_IsAssignableFrom, 3473 3474 jni_ToReflectedField, 3475 3476 jni_Throw, 3477 jni_ThrowNew, 3478 jni_ExceptionOccurred, 3479 jni_ExceptionDescribe, 3480 jni_ExceptionClear, 3481 jni_FatalError, 3482 3483 jni_PushLocalFrame, 3484 jni_PopLocalFrame, 3485 3486 jni_NewGlobalRef, 3487 jni_DeleteGlobalRef, 3488 jni_DeleteLocalRef, 3489 jni_IsSameObject, 3490 3491 jni_NewLocalRef, 3492 jni_EnsureLocalCapacity, 3493 3494 jni_AllocObject, 3495 jni_NewObject, 3496 jni_NewObjectV, 3497 jni_NewObjectA, 3498 3499 jni_GetObjectClass, 3500 jni_IsInstanceOf, 3501 3502 jni_GetMethodID, 3503 3504 jni_CallObjectMethod, 3505 jni_CallObjectMethodV, 3506 jni_CallObjectMethodA, 3507 jni_CallBooleanMethod, 3508 jni_CallBooleanMethodV, 3509 jni_CallBooleanMethodA, 3510 jni_CallByteMethod, 3511 jni_CallByteMethodV, 3512 jni_CallByteMethodA, 3513 jni_CallCharMethod, 3514 jni_CallCharMethodV, 3515 jni_CallCharMethodA, 3516 jni_CallShortMethod, 3517 jni_CallShortMethodV, 3518 jni_CallShortMethodA, 3519 jni_CallIntMethod, 3520 jni_CallIntMethodV, 3521 jni_CallIntMethodA, 3522 jni_CallLongMethod, 3523 jni_CallLongMethodV, 3524 jni_CallLongMethodA, 3525 jni_CallFloatMethod, 3526 jni_CallFloatMethodV, 3527 jni_CallFloatMethodA, 3528 jni_CallDoubleMethod, 3529 jni_CallDoubleMethodV, 3530 jni_CallDoubleMethodA, 3531 jni_CallVoidMethod, 3532 jni_CallVoidMethodV, 3533 jni_CallVoidMethodA, 3534 3535 jni_CallNonvirtualObjectMethod, 3536 jni_CallNonvirtualObjectMethodV, 3537 jni_CallNonvirtualObjectMethodA, 3538 jni_CallNonvirtualBooleanMethod, 3539 jni_CallNonvirtualBooleanMethodV, 3540 jni_CallNonvirtualBooleanMethodA, 3541 jni_CallNonvirtualByteMethod, 3542 jni_CallNonvirtualByteMethodV, 3543 jni_CallNonvirtualByteMethodA, 3544 jni_CallNonvirtualCharMethod, 3545 jni_CallNonvirtualCharMethodV, 3546 jni_CallNonvirtualCharMethodA, 3547 jni_CallNonvirtualShortMethod, 3548 jni_CallNonvirtualShortMethodV, 3549 jni_CallNonvirtualShortMethodA, 3550 jni_CallNonvirtualIntMethod, 3551 jni_CallNonvirtualIntMethodV, 3552 jni_CallNonvirtualIntMethodA, 3553 jni_CallNonvirtualLongMethod, 3554 jni_CallNonvirtualLongMethodV, 3555 jni_CallNonvirtualLongMethodA, 3556 jni_CallNonvirtualFloatMethod, 3557 jni_CallNonvirtualFloatMethodV, 3558 jni_CallNonvirtualFloatMethodA, 3559 jni_CallNonvirtualDoubleMethod, 3560 jni_CallNonvirtualDoubleMethodV, 3561 jni_CallNonvirtualDoubleMethodA, 3562 jni_CallNonvirtualVoidMethod, 3563 jni_CallNonvirtualVoidMethodV, 3564 jni_CallNonvirtualVoidMethodA, 3565 3566 jni_GetFieldID, 3567 3568 jni_GetObjectField, 3569 jni_GetBooleanField, 3570 jni_GetByteField, 3571 jni_GetCharField, 3572 jni_GetShortField, 3573 jni_GetIntField, 3574 jni_GetLongField, 3575 jni_GetFloatField, 3576 jni_GetDoubleField, 3577 3578 jni_SetObjectField, 3579 jni_SetBooleanField, 3580 jni_SetByteField, 3581 jni_SetCharField, 3582 jni_SetShortField, 3583 jni_SetIntField, 3584 jni_SetLongField, 3585 jni_SetFloatField, 3586 jni_SetDoubleField, 3587 3588 jni_GetStaticMethodID, 3589 3590 jni_CallStaticObjectMethod, 3591 jni_CallStaticObjectMethodV, 3592 jni_CallStaticObjectMethodA, 3593 jni_CallStaticBooleanMethod, 3594 jni_CallStaticBooleanMethodV, 3595 jni_CallStaticBooleanMethodA, 3596 jni_CallStaticByteMethod, 3597 jni_CallStaticByteMethodV, 3598 jni_CallStaticByteMethodA, 3599 jni_CallStaticCharMethod, 3600 jni_CallStaticCharMethodV, 3601 jni_CallStaticCharMethodA, 3602 jni_CallStaticShortMethod, 3603 jni_CallStaticShortMethodV, 3604 jni_CallStaticShortMethodA, 3605 jni_CallStaticIntMethod, 3606 jni_CallStaticIntMethodV, 3607 jni_CallStaticIntMethodA, 3608 jni_CallStaticLongMethod, 3609 jni_CallStaticLongMethodV, 3610 jni_CallStaticLongMethodA, 3611 jni_CallStaticFloatMethod, 3612 jni_CallStaticFloatMethodV, 3613 jni_CallStaticFloatMethodA, 3614 jni_CallStaticDoubleMethod, 3615 jni_CallStaticDoubleMethodV, 3616 jni_CallStaticDoubleMethodA, 3617 jni_CallStaticVoidMethod, 3618 jni_CallStaticVoidMethodV, 3619 jni_CallStaticVoidMethodA, 3620 3621 jni_GetStaticFieldID, 3622 3623 jni_GetStaticObjectField, 3624 jni_GetStaticBooleanField, 3625 jni_GetStaticByteField, 3626 jni_GetStaticCharField, 3627 jni_GetStaticShortField, 3628 jni_GetStaticIntField, 3629 jni_GetStaticLongField, 3630 jni_GetStaticFloatField, 3631 jni_GetStaticDoubleField, 3632 3633 jni_SetStaticObjectField, 3634 jni_SetStaticBooleanField, 3635 jni_SetStaticByteField, 3636 jni_SetStaticCharField, 3637 jni_SetStaticShortField, 3638 jni_SetStaticIntField, 3639 jni_SetStaticLongField, 3640 jni_SetStaticFloatField, 3641 jni_SetStaticDoubleField, 3642 3643 jni_NewString, 3644 jni_GetStringLength, 3645 jni_GetStringChars, 3646 jni_ReleaseStringChars, 3647 3648 jni_NewStringUTF, 3649 jni_GetStringUTFLength, 3650 jni_GetStringUTFChars, 3651 jni_ReleaseStringUTFChars, 3652 3653 jni_GetArrayLength, 3654 3655 jni_NewObjectArray, 3656 jni_GetObjectArrayElement, 3657 jni_SetObjectArrayElement, 3658 3659 jni_NewBooleanArray, 3660 jni_NewByteArray, 3661 jni_NewCharArray, 3662 jni_NewShortArray, 3663 jni_NewIntArray, 3664 jni_NewLongArray, 3665 jni_NewFloatArray, 3666 jni_NewDoubleArray, 3667 3668 jni_GetBooleanArrayElements, 3669 jni_GetByteArrayElements, 3670 jni_GetCharArrayElements, 3671 jni_GetShortArrayElements, 3672 jni_GetIntArrayElements, 3673 jni_GetLongArrayElements, 3674 jni_GetFloatArrayElements, 3675 jni_GetDoubleArrayElements, 3676 3677 jni_ReleaseBooleanArrayElements, 3678 jni_ReleaseByteArrayElements, 3679 jni_ReleaseCharArrayElements, 3680 jni_ReleaseShortArrayElements, 3681 jni_ReleaseIntArrayElements, 3682 jni_ReleaseLongArrayElements, 3683 jni_ReleaseFloatArrayElements, 3684 jni_ReleaseDoubleArrayElements, 3685 3686 jni_GetBooleanArrayRegion, 3687 jni_GetByteArrayRegion, 3688 jni_GetCharArrayRegion, 3689 jni_GetShortArrayRegion, 3690 jni_GetIntArrayRegion, 3691 jni_GetLongArrayRegion, 3692 jni_GetFloatArrayRegion, 3693 jni_GetDoubleArrayRegion, 3694 3695 jni_SetBooleanArrayRegion, 3696 jni_SetByteArrayRegion, 3697 jni_SetCharArrayRegion, 3698 jni_SetShortArrayRegion, 3699 jni_SetIntArrayRegion, 3700 jni_SetLongArrayRegion, 3701 jni_SetFloatArrayRegion, 3702 jni_SetDoubleArrayRegion, 3703 3704 jni_RegisterNatives, 3705 jni_UnregisterNatives, 3706 3707 jni_MonitorEnter, 3708 jni_MonitorExit, 3709 3710 jni_GetJavaVM, 3711 3712 jni_GetStringRegion, 3713 jni_GetStringUTFRegion, 3714 3715 jni_GetPrimitiveArrayCritical, 3716 jni_ReleasePrimitiveArrayCritical, 3717 3718 jni_GetStringCritical, 3719 jni_ReleaseStringCritical, 3720 3721 jni_NewWeakGlobalRef, 3722 jni_DeleteWeakGlobalRef, 3723 3724 jni_ExceptionCheck, 3725 3726 jni_NewDirectByteBuffer, 3727 jni_GetDirectBufferAddress, 3728 jni_GetDirectBufferCapacity, 3729 3730 // New 1_6 features 3731 3732 jni_GetObjectRefType, 3733 3734 // Module features 3735 3736 jni_GetModule 3737 }; 3738 3739 3740 // For jvmti use to modify jni function table. 3741 // Java threads in native contiues to run until it is transitioned 3742 // to VM at safepoint. Before the transition or before it is blocked 3743 // for safepoint it may access jni function table. VM could crash if 3744 // any java thread access the jni function table in the middle of memcpy. 3745 // To avoid this each function pointers are copied automically. 3746 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3747 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3748 intptr_t *a = (intptr_t *) jni_functions(); 3749 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3750 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3751 Atomic::store(*b++, a++); 3752 } 3753 } 3754 3755 void quicken_jni_functions() { 3756 // Replace Get<Primitive>Field with fast versions 3757 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3758 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3759 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3760 // windows x86 currently needs SEH wrapper and the gain of the fast 3761 // versions currently isn't certain for server vm on uniprocessor. 3762 && os::is_MP() 3763 #endif 3764 ) { 3765 address func; 3766 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3767 if (func != (address)-1) { 3768 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3769 } 3770 func = JNI_FastGetField::generate_fast_get_byte_field(); 3771 if (func != (address)-1) { 3772 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3773 } 3774 func = JNI_FastGetField::generate_fast_get_char_field(); 3775 if (func != (address)-1) { 3776 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3777 } 3778 func = JNI_FastGetField::generate_fast_get_short_field(); 3779 if (func != (address)-1) { 3780 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3781 } 3782 func = JNI_FastGetField::generate_fast_get_int_field(); 3783 if (func != (address)-1) { 3784 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3785 } 3786 func = JNI_FastGetField::generate_fast_get_long_field(); 3787 if (func != (address)-1) { 3788 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3789 } 3790 func = JNI_FastGetField::generate_fast_get_float_field(); 3791 if (func != (address)-1) { 3792 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3793 } 3794 func = JNI_FastGetField::generate_fast_get_double_field(); 3795 if (func != (address)-1) { 3796 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3797 } 3798 } 3799 } 3800 3801 // Returns the function structure 3802 struct JNINativeInterface_* jni_functions() { 3803 #if INCLUDE_JNI_CHECK 3804 if (CheckJNICalls) return jni_functions_check(); 3805 #endif // INCLUDE_JNI_CHECK 3806 return &jni_NativeInterface; 3807 } 3808 3809 // Returns the function structure 3810 struct JNINativeInterface_* jni_functions_nocheck() { 3811 return &jni_NativeInterface; 3812 } 3813 3814 3815 // Invocation API 3816 3817 3818 // Forward declaration 3819 extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3820 3821 // Global invocation API vars 3822 volatile int vm_created = 0; 3823 // Indicate whether it is safe to recreate VM 3824 volatile int safe_to_recreate_vm = 1; 3825 struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3826 3827 3828 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3829 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3830 3831 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3832 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3833 3834 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3835 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3836 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3837 jint ret = JNI_ERR; 3838 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3839 3840 if (Threads::is_supported_jni_version(args->version)) { 3841 ret = JNI_OK; 3842 } 3843 // 1.1 style no longer supported in hotspot. 3844 // According the JNI spec, we should update args->version on return. 3845 // We also use the structure to communicate with launcher about default 3846 // stack size. 3847 if (args->version == JNI_VERSION_1_1) { 3848 args->version = JNI_VERSION_1_2; 3849 // javaStackSize is int in arguments structure 3850 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3851 args->javaStackSize = (jint)(ThreadStackSize * K); 3852 } 3853 return ret; 3854 } 3855 3856 DT_RETURN_MARK_DECL(CreateJavaVM, jint 3857 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3858 3859 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3860 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3861 3862 jint result = JNI_ERR; 3863 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3864 3865 // We're about to use Atomic::xchg for synchronization. Some Zero 3866 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3867 // but __sync_lock_test_and_set is not guaranteed to do what we want 3868 // on all architectures. So we check it works before relying on it. 3869 #if defined(ZERO) && defined(ASSERT) 3870 { 3871 jint a = 0xcafebabe; 3872 jint b = Atomic::xchg((jint) 0xdeadbeef, &a); 3873 void *c = &a; 3874 void *d = Atomic::xchg(&b, &c); 3875 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3876 assert(c == &b && d == &a, "Atomic::xchg() works"); 3877 } 3878 #endif // ZERO && ASSERT 3879 3880 // At the moment it's only possible to have one Java VM, 3881 // since some of the runtime state is in global variables. 3882 3883 // We cannot use our mutex locks here, since they only work on 3884 // Threads. We do an atomic compare and exchange to ensure only 3885 // one thread can call this method at a time 3886 3887 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3888 // the add/dec implementations are dependent on whether we are running 3889 // on a multiprocessor, and at this stage of initialization the os::is_MP 3890 // function used to determine this will always return false. Atomic::xchg 3891 // does not have this problem. 3892 if (Atomic::xchg(1, &vm_created) == 1) { 3893 return JNI_EEXIST; // already created, or create attempt in progress 3894 } 3895 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3896 return JNI_ERR; // someone tried and failed and retry not allowed. 3897 } 3898 3899 assert(vm_created == 1, "vm_created is true during the creation"); 3900 3901 /** 3902 * Certain errors during initialization are recoverable and do not 3903 * prevent this method from being called again at a later time 3904 * (perhaps with different arguments). However, at a certain 3905 * point during initialization if an error occurs we cannot allow 3906 * this function to be called again (or it will crash). In those 3907 * situations, the 'canTryAgain' flag is set to false, which atomically 3908 * sets safe_to_recreate_vm to 1, such that any new call to 3909 * JNI_CreateJavaVM will immediately fail using the above logic. 3910 */ 3911 bool can_try_again = true; 3912 3913 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3914 if (result == JNI_OK) { 3915 JavaThread *thread = JavaThread::current(); 3916 assert(!thread->has_pending_exception(), "should have returned not OK"); 3917 /* thread is thread_in_vm here */ 3918 *vm = (JavaVM *)(&main_vm); 3919 *(JNIEnv**)penv = thread->jni_environment(); 3920 3921 #if INCLUDE_JVMCI 3922 if (EnableJVMCI) { 3923 if (UseJVMCICompiler) { 3924 // JVMCI is initialized on a CompilerThread 3925 if (BootstrapJVMCI) { 3926 JavaThread* THREAD = thread; 3927 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH); 3928 compiler->bootstrap(THREAD); 3929 if (HAS_PENDING_EXCEPTION) { 3930 HandleMark hm; 3931 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3932 } 3933 } 3934 } 3935 } 3936 #endif 3937 3938 // Tracks the time application was running before GC 3939 RuntimeService::record_application_start(); 3940 3941 // Notify JVMTI 3942 if (JvmtiExport::should_post_thread_life()) { 3943 JvmtiExport::post_thread_start(thread); 3944 } 3945 3946 EventThreadStart event; 3947 if (event.should_commit()) { 3948 event.set_thread(THREAD_TRACE_ID(thread)); 3949 event.commit(); 3950 } 3951 3952 #ifndef PRODUCT 3953 // Check if we should compile all classes on bootclasspath 3954 if (CompileTheWorld) ClassLoader::compile_the_world(); 3955 if (ReplayCompiles) ciReplay::replay(thread); 3956 3957 // Some platforms (like Win*) need a wrapper around these test 3958 // functions in order to properly handle error conditions. 3959 VMError::test_error_handler(); 3960 if (ExecuteInternalVMTests) { 3961 InternalVMTests::run(); 3962 } 3963 #endif 3964 3965 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3966 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3967 } else { 3968 // If create_vm exits because of a pending exception, exit with that 3969 // exception. In the future when we figure out how to reclaim memory, 3970 // we may be able to exit with JNI_ERR and allow the calling application 3971 // to continue. 3972 if (Universe::is_fully_initialized()) { 3973 // otherwise no pending exception possible - VM will already have aborted 3974 JavaThread* THREAD = JavaThread::current(); 3975 if (HAS_PENDING_EXCEPTION) { 3976 HandleMark hm; 3977 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3978 } 3979 } 3980 3981 if (can_try_again) { 3982 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3983 safe_to_recreate_vm = 1; 3984 } 3985 3986 // Creation failed. We must reset vm_created 3987 *vm = 0; 3988 *(JNIEnv**)penv = 0; 3989 // reset vm_created last to avoid race condition. Use OrderAccess to 3990 // control both compiler and architectural-based reordering. 3991 OrderAccess::release_store(&vm_created, 0); 3992 } 3993 3994 // Flush stdout and stderr before exit. 3995 fflush(stdout); 3996 fflush(stderr); 3997 3998 return result; 3999 4000 } 4001 4002 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4003 jint result = JNI_ERR; 4004 // On Windows, let CreateJavaVM run with SEH protection 4005 #ifdef _WIN32 4006 __try { 4007 #endif 4008 result = JNI_CreateJavaVM_inner(vm, penv, args); 4009 #ifdef _WIN32 4010 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4011 // Nothing to do. 4012 } 4013 #endif 4014 return result; 4015 } 4016 4017 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4018 // See bug 4367188, the wrapper can sometimes cause VM crashes 4019 // JNIWrapper("GetCreatedJavaVMs"); 4020 4021 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4022 4023 if (vm_created == 1) { 4024 if (numVMs != NULL) *numVMs = 1; 4025 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4026 } else { 4027 if (numVMs != NULL) *numVMs = 0; 4028 } 4029 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4030 return JNI_OK; 4031 } 4032 4033 extern "C" { 4034 4035 DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4036 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4037 4038 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) { 4039 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4040 jint res = JNI_ERR; 4041 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4042 4043 if (vm_created == 0) { 4044 res = JNI_ERR; 4045 return res; 4046 } 4047 4048 JNIWrapper("DestroyJavaVM"); 4049 JNIEnv *env; 4050 JavaVMAttachArgs destroyargs; 4051 destroyargs.version = CurrentVersion; 4052 destroyargs.name = (char *)"DestroyJavaVM"; 4053 destroyargs.group = NULL; 4054 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4055 if (res != JNI_OK) { 4056 return res; 4057 } 4058 4059 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4060 JavaThread* thread = JavaThread::current(); 4061 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4062 if (Threads::destroy_vm()) { 4063 // Should not change thread state, VM is gone 4064 vm_created = 0; 4065 res = JNI_OK; 4066 return res; 4067 } else { 4068 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4069 res = JNI_ERR; 4070 return res; 4071 } 4072 } 4073 4074 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4075 jint result = JNI_ERR; 4076 // On Windows, we need SEH protection 4077 #ifdef _WIN32 4078 __try { 4079 #endif 4080 result = jni_DestroyJavaVM_inner(vm); 4081 #ifdef _WIN32 4082 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4083 // Nothing to do. 4084 } 4085 #endif 4086 return result; 4087 } 4088 4089 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4090 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4091 4092 // Check below commented out from JDK1.2fcs as well 4093 /* 4094 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4095 return JNI_EVERSION; 4096 } 4097 */ 4098 4099 Thread* t = Thread::current_or_null(); 4100 if (t != NULL) { 4101 // If the thread has been attached this operation is a no-op 4102 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4103 return JNI_OK; 4104 } 4105 4106 // Create a thread and mark it as attaching so it will be skipped by the 4107 // ThreadsListEnumerator - see CR 6404306 4108 JavaThread* thread = new JavaThread(true); 4109 4110 // Set correct safepoint info. The thread is going to call into Java when 4111 // initializing the Java level thread object. Hence, the correct state must 4112 // be set in order for the Safepoint code to deal with it correctly. 4113 thread->set_thread_state(_thread_in_vm); 4114 thread->record_stack_base_and_size(); 4115 thread->initialize_thread_current(); 4116 4117 if (!os::create_attached_thread(thread)) { 4118 thread->smr_delete(); 4119 return JNI_ERR; 4120 } 4121 // Enable stack overflow checks 4122 thread->create_stack_guard_pages(); 4123 4124 thread->initialize_tlab(); 4125 4126 thread->cache_global_variables(); 4127 4128 // Crucial that we do not have a safepoint check for this thread, since it has 4129 // not been added to the Thread list yet. 4130 { Threads_lock->lock_without_safepoint_check(); 4131 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4132 // avoid this thread trying to do a GC before it is added to the thread-list 4133 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4134 Threads::add(thread, daemon); 4135 Threads_lock->unlock(); 4136 } 4137 // Create thread group and name info from attach arguments 4138 oop group = NULL; 4139 char* thread_name = NULL; 4140 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4141 group = JNIHandles::resolve(args->group); 4142 thread_name = args->name; // may be NULL 4143 } 4144 if (group == NULL) group = Universe::main_thread_group(); 4145 4146 // Create Java level thread object and attach it to this thread 4147 bool attach_failed = false; 4148 { 4149 EXCEPTION_MARK; 4150 HandleMark hm(THREAD); 4151 Handle thread_group(THREAD, group); 4152 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4153 if (HAS_PENDING_EXCEPTION) { 4154 CLEAR_PENDING_EXCEPTION; 4155 // cleanup outside the handle mark. 4156 attach_failed = true; 4157 } 4158 } 4159 4160 if (attach_failed) { 4161 // Added missing cleanup 4162 thread->cleanup_failed_attach_current_thread(); 4163 return JNI_ERR; 4164 } 4165 4166 // mark the thread as no longer attaching 4167 // this uses a fence to push the change through so we don't have 4168 // to regrab the threads_lock 4169 thread->set_done_attaching_via_jni(); 4170 4171 // Set java thread status. 4172 java_lang_Thread::set_thread_status(thread->threadObj(), 4173 java_lang_Thread::RUNNABLE); 4174 4175 // Notify the debugger 4176 if (JvmtiExport::should_post_thread_life()) { 4177 JvmtiExport::post_thread_start(thread); 4178 } 4179 4180 EventThreadStart event; 4181 if (event.should_commit()) { 4182 event.set_thread(THREAD_TRACE_ID(thread)); 4183 event.commit(); 4184 } 4185 4186 *(JNIEnv**)penv = thread->jni_environment(); 4187 4188 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4189 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4190 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4191 // needed. 4192 4193 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4194 4195 // Perform any platform dependent FPU setup 4196 os::setup_fpu(); 4197 4198 return JNI_OK; 4199 } 4200 4201 4202 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4203 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4204 if (vm_created == 0) { 4205 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4206 return JNI_ERR; 4207 } 4208 4209 JNIWrapper("AttachCurrentThread"); 4210 jint ret = attach_current_thread(vm, penv, _args, false); 4211 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4212 return ret; 4213 } 4214 4215 4216 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4217 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4218 4219 JNIWrapper("DetachCurrentThread"); 4220 4221 // If the thread has already been detached the operation is a no-op 4222 if (Thread::current_or_null() == NULL) { 4223 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4224 return JNI_OK; 4225 } 4226 4227 VM_Exit::block_if_vm_exited(); 4228 4229 JavaThread* thread = JavaThread::current(); 4230 if (thread->has_last_Java_frame()) { 4231 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4232 // Can't detach a thread that's running java, that can't work. 4233 return JNI_ERR; 4234 } 4235 4236 // Safepoint support. Have to do call-back to safepoint code, if in the 4237 // middle of a safepoint operation 4238 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4239 4240 // XXX: Note that JavaThread::exit() call below removes the guards on the 4241 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4242 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4243 // of the guards is visible in jni_AttachCurrentThread above, 4244 // the removal of the guards is buried below in JavaThread::exit() 4245 // here. The abstraction should be more symmetrically either exposed 4246 // or hidden (e.g. it could probably be hidden in the same 4247 // (platform-dependent) methods where we do alternate stack 4248 // maintenance work?) 4249 thread->exit(false, JavaThread::jni_detach); 4250 thread->smr_delete(); 4251 4252 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4253 return JNI_OK; 4254 } 4255 4256 DT_RETURN_MARK_DECL(GetEnv, jint 4257 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4258 4259 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4260 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4261 jint ret = JNI_ERR; 4262 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4263 4264 if (vm_created == 0) { 4265 *penv = NULL; 4266 ret = JNI_EDETACHED; 4267 return ret; 4268 } 4269 4270 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4271 return ret; 4272 } 4273 4274 #ifndef JVMPI_VERSION_1 4275 // need these in order to be polite about older agents 4276 #define JVMPI_VERSION_1 ((jint)0x10000001) 4277 #define JVMPI_VERSION_1_1 ((jint)0x10000002) 4278 #define JVMPI_VERSION_1_2 ((jint)0x10000003) 4279 #endif // !JVMPI_VERSION_1 4280 4281 Thread* thread = Thread::current_or_null(); 4282 if (thread != NULL && thread->is_Java_thread()) { 4283 if (Threads::is_supported_jni_version_including_1_1(version)) { 4284 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4285 ret = JNI_OK; 4286 return ret; 4287 4288 } else if (version == JVMPI_VERSION_1 || 4289 version == JVMPI_VERSION_1_1 || 4290 version == JVMPI_VERSION_1_2) { 4291 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4292 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4293 ret = JNI_EVERSION; 4294 return ret; 4295 } else if (JvmtiExport::is_jvmdi_version(version)) { 4296 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4297 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4298 ret = JNI_EVERSION; 4299 return ret; 4300 } else { 4301 *penv = NULL; 4302 ret = JNI_EVERSION; 4303 return ret; 4304 } 4305 } else { 4306 *penv = NULL; 4307 ret = JNI_EDETACHED; 4308 return ret; 4309 } 4310 } 4311 4312 4313 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4314 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4315 if (vm_created == 0) { 4316 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4317 return JNI_ERR; 4318 } 4319 4320 JNIWrapper("AttachCurrentThreadAsDaemon"); 4321 jint ret = attach_current_thread(vm, penv, _args, true); 4322 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4323 return ret; 4324 } 4325 4326 4327 } // End extern "C" 4328 4329 const struct JNIInvokeInterface_ jni_InvokeInterface = { 4330 NULL, 4331 NULL, 4332 NULL, 4333 4334 jni_DestroyJavaVM, 4335 jni_AttachCurrentThread, 4336 jni_DetachCurrentThread, 4337 jni_GetEnv, 4338 jni_AttachCurrentThreadAsDaemon 4339 };