jni.cpp revision 1601:126ea7725993
1/* 2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25# include "incls/_precompiled.incl" 26# include "incls/_jni.cpp.incl" 27 28static jint CurrentVersion = JNI_VERSION_1_6; 29 30 31// The DT_RETURN_MARK macros create a scoped object to fire the dtrace 32// '-return' probe regardless of the return path is taken out of the function. 33// Methods that have multiple return paths use this to avoid having to 34// instrument each return path. Methods that use CHECK or THROW must use this 35// since those macros can cause an immedate uninstrumented return. 36// 37// In order to get the return value, a reference to the variable containing 38// the return value must be passed to the contructor of the object, and 39// the return value must be set before return (since the mark object has 40// a reference to it). 41// 42// Example: 43// DT_RETURN_MARK_DECL(SomeFunc, int); 44// JNI_ENTRY(int, SomeFunc, ...) 45// int return_value = 0; 46// DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 47// foo(CHECK_0) 48// return_value = 5; 49// return return_value; 50// JNI_END 51#define DT_RETURN_MARK_DECL(name, type) \ 52 HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type); \ 53 DTRACE_ONLY( \ 54 class DTraceReturnProbeMark_##name { \ 55 public: \ 56 const type& _ret_ref; \ 57 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 58 ~DTraceReturnProbeMark_##name() { \ 59 HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref); \ 60 } \ 61 } \ 62 ) 63// Void functions are simpler since there's no return value 64#define DT_VOID_RETURN_MARK_DECL(name) \ 65 HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return); \ 66 DTRACE_ONLY( \ 67 class DTraceReturnProbeMark_##name { \ 68 public: \ 69 ~DTraceReturnProbeMark_##name() { \ 70 HS_DTRACE_PROBE0(hotspot_jni, name##__return); \ 71 } \ 72 } \ 73 ) 74 75 76// Place these macros in the function to mark the return. Non-void 77// functions need the type and address of the return value. 78#define DT_RETURN_MARK(name, type, ref) \ 79 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 80#define DT_VOID_RETURN_MARK(name) \ 81 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 82 83 84// Use these to select distinct code for floating-point vs. non-floating point 85// situations. Used from within common macros where we need slightly 86// different behavior for Float/Double 87#define FP_SELECT_Boolean(intcode, fpcode) intcode 88#define FP_SELECT_Byte(intcode, fpcode) intcode 89#define FP_SELECT_Char(intcode, fpcode) intcode 90#define FP_SELECT_Short(intcode, fpcode) intcode 91#define FP_SELECT_Object(intcode, fpcode) intcode 92#define FP_SELECT_Int(intcode, fpcode) intcode 93#define FP_SELECT_Long(intcode, fpcode) intcode 94#define FP_SELECT_Float(intcode, fpcode) fpcode 95#define FP_SELECT_Double(intcode, fpcode) fpcode 96#define FP_SELECT(TypeName, intcode, fpcode) \ 97 FP_SELECT_##TypeName(intcode, fpcode) 98 99#define COMMA , 100 101// Choose DT_RETURN_MARK macros based on the type: float/double -> void 102// (dtrace doesn't do FP yet) 103#define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \ 104 FP_SELECT(TypeName, \ 105 DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) ) 106#define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 107 FP_SELECT(TypeName, \ 108 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 109 110 111// out-of-line helpers for class jfieldIDWorkaround: 112 113bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) { 114 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 115 uintptr_t as_uint = (uintptr_t) id; 116 intptr_t offset = raw_instance_offset(id); 117 if (is_checked_jfieldID(id)) { 118 if (!klass_hash_ok(k, id)) { 119 return false; 120 } 121 } 122 return instanceKlass::cast(k)->contains_field_offset(offset); 123 } else { 124 JNIid* result = (JNIid*) id; 125#ifdef ASSERT 126 return result != NULL && result->is_static_field_id(); 127#else 128 return result != NULL; 129#endif 130 } 131} 132 133 134intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) { 135 if (offset <= small_offset_mask) { 136 klassOop field_klass = k; 137 klassOop super_klass = Klass::cast(field_klass)->super(); 138 // With compressed oops the most super class with nonstatic fields would 139 // be the owner of fields embedded in the header. 140 while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && 141 instanceKlass::cast(super_klass)->contains_field_offset(offset)) { 142 field_klass = super_klass; // super contains the field also 143 super_klass = Klass::cast(field_klass)->super(); 144 } 145 debug_only(No_Safepoint_Verifier nosafepoint;) 146 uintptr_t klass_hash = field_klass->identity_hash(); 147 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 148 } else { 149#if 0 150 #ifndef PRODUCT 151 { 152 ResourceMark rm; 153 warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name()); 154 } 155 #endif 156#endif 157 return 0; 158 } 159} 160 161bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) { 162 uintptr_t as_uint = (uintptr_t) id; 163 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 164 do { 165 debug_only(No_Safepoint_Verifier nosafepoint;) 166 // Could use a non-blocking query for identity_hash here... 167 if ((k->identity_hash() & klass_mask) == klass_hash) 168 return true; 169 k = Klass::cast(k)->super(); 170 } while (k != NULL); 171 return false; 172} 173 174void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) { 175 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 176 uintptr_t as_uint = (uintptr_t) id; 177 intptr_t offset = raw_instance_offset(id); 178 if (VerifyJNIFields) { 179 if (is_checked_jfieldID(id)) { 180 guarantee(klass_hash_ok(k, id), 181 "Bug in native code: jfieldID class must match object"); 182 } else { 183#if 0 184 #ifndef PRODUCT 185 if (Verbose) { 186 ResourceMark rm; 187 warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name()); 188 } 189 #endif 190#endif 191 } 192 } 193 guarantee(instanceKlass::cast(k)->contains_field_offset(offset), 194 "Bug in native code: jfieldID offset must address interior of object"); 195} 196 197// Pick a reasonable higher bound for local capacity requested 198// for EnsureLocalCapacity and PushLocalFrame. We don't want it too 199// high because a test (or very unusual application) may try to allocate 200// that many handles and run out of swap space. An implementation is 201// permitted to allocate more handles than the ensured capacity, so this 202// value is set high enough to prevent compatibility problems. 203const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; 204 205 206// Wrapper to trace JNI functions 207 208#ifdef ASSERT 209 Histogram* JNIHistogram; 210 static volatile jint JNIHistogram_lock = 0; 211 212 class JNITraceWrapper : public StackObj { 213 public: 214 JNITraceWrapper(const char* format, ...) { 215 if (TraceJNICalls) { 216 va_list ap; 217 va_start(ap, format); 218 tty->print("JNI "); 219 tty->vprint_cr(format, ap); 220 va_end(ap); 221 } 222 } 223 }; 224 225 class JNIHistogramElement : public HistogramElement { 226 public: 227 JNIHistogramElement(const char* name); 228 }; 229 230 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 231 _name = elementName; 232 uintx count = 0; 233 234 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 235 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 236 count +=1; 237 if ( (WarnOnStalledSpinLock > 0) 238 && (count % WarnOnStalledSpinLock == 0)) { 239 warning("JNIHistogram_lock seems to be stalled"); 240 } 241 } 242 } 243 244 245 if(JNIHistogram == NULL) 246 JNIHistogram = new Histogram("JNI Call Counts",100); 247 248 JNIHistogram->add_element(this); 249 Atomic::dec(&JNIHistogram_lock); 250 } 251 252 #define JNICountWrapper(arg) \ 253 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 254 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 255 if (e != NULL) e->increment_count() 256 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) 257#else 258 #define JNIWrapper(arg) 259#endif 260 261 262// Implementation of JNI entries 263 264DT_RETURN_MARK_DECL(DefineClass, jclass); 265 266JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 267 const jbyte *buf, jsize bufLen)) 268 JNIWrapper("DefineClass"); 269 270 DTRACE_PROBE5(hotspot_jni, DefineClass__entry, 271 env, name, loaderRef, buf, bufLen); 272 jclass cls = NULL; 273 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 274 275 // Since exceptions can be thrown, class initialization can take place 276 // if name is NULL no check for class name in .class stream has to be made. 277 symbolHandle class_name; 278 if (name != NULL) { 279 const int str_len = (int)strlen(name); 280 if (str_len > symbolOopDesc::max_length()) { 281 // It's impossible to create this class; the name cannot fit 282 // into the constant pool. 283 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 284 } 285 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); 286 } 287 288 ResourceMark rm(THREAD); 289 ClassFileStream st((u1*) buf, bufLen, NULL); 290 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 291 292 if (UsePerfData && !class_loader.is_null()) { 293 // check whether the current caller thread holds the lock or not. 294 // If not, increment the corresponding counter 295 if (ObjectSynchronizer:: 296 query_lock_ownership((JavaThread*)THREAD, class_loader) != 297 ObjectSynchronizer::owner_self) { 298 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 299 } 300 } 301 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, 302 Handle(), &st, true, 303 CHECK_NULL); 304 305 if (TraceClassResolution && k != NULL) { 306 trace_class_resolution(k); 307 } 308 309 cls = (jclass)JNIHandles::make_local( 310 env, Klass::cast(k)->java_mirror()); 311 return cls; 312JNI_END 313 314 315 316static bool first_time_FindClass = true; 317 318DT_RETURN_MARK_DECL(FindClass, jclass); 319 320JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 321 JNIWrapper("FindClass"); 322 DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); 323 324 jclass result = NULL; 325 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 326 327 // Remember if we are the first invocation of jni_FindClass 328 bool first_time = first_time_FindClass; 329 first_time_FindClass = false; 330 331 // Sanity check the name: it cannot be null or larger than the maximum size 332 // name we can fit in the constant pool. 333 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 334 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 335 } 336 337 //%note jni_3 338 Handle loader; 339 Handle protection_domain; 340 // Find calling class 341 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 342 if (k.not_null()) { 343 loader = Handle(THREAD, k->class_loader()); 344 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 345 // in the correct class context. 346 if (loader.is_null() && 347 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 348 JavaValue result(T_OBJECT); 349 JavaCalls::call_static(&result, k, 350 vmSymbolHandles::getFromClass_name(), 351 vmSymbolHandles::void_class_signature(), 352 thread); 353 if (HAS_PENDING_EXCEPTION) { 354 Handle ex(thread, thread->pending_exception()); 355 CLEAR_PENDING_EXCEPTION; 356 THROW_HANDLE_0(ex); 357 } 358 oop mirror = (oop) result.get_jobject(); 359 loader = Handle(THREAD, 360 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); 361 protection_domain = Handle(THREAD, 362 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); 363 } 364 } else { 365 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 366 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 367 } 368 369 symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL); 370 result = find_class_from_class_loader(env, sym, true, loader, 371 protection_domain, true, thread); 372 373 if (TraceClassResolution && result != NULL) { 374 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 375 } 376 377 // If we were the first invocation of jni_FindClass, we enable compilation again 378 // rather than just allowing invocation counter to overflow and decay. 379 // Controlled by flag DelayCompilationDuringStartup. 380 if (first_time && !CompileTheWorld) 381 CompilationPolicy::completed_vm_startup(); 382 383 return result; 384JNI_END 385 386DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); 387 388JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 389 JNIWrapper("FromReflectedMethod"); 390 DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); 391 jmethodID ret = NULL; 392 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 393 394 // method is a handle to a java.lang.reflect.Method object 395 oop reflected = JNIHandles::resolve_non_null(method); 396 oop mirror = NULL; 397 int slot = 0; 398 399 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 400 mirror = java_lang_reflect_Constructor::clazz(reflected); 401 slot = java_lang_reflect_Constructor::slot(reflected); 402 } else { 403 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 404 mirror = java_lang_reflect_Method::clazz(reflected); 405 slot = java_lang_reflect_Method::slot(reflected); 406 } 407 klassOop k = java_lang_Class::as_klassOop(mirror); 408 409 KlassHandle k1(THREAD, k); 410 // Make sure class is initialized before handing id's out to methods 411 Klass::cast(k1())->initialize(CHECK_NULL); 412 methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); 413 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 414 return ret; 415JNI_END 416 417DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); 418 419JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 420 JNIWrapper("FromReflectedField"); 421 DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); 422 jfieldID ret = NULL; 423 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 424 425 // field is a handle to a java.lang.reflect.Field object 426 oop reflected = JNIHandles::resolve_non_null(field); 427 oop mirror = java_lang_reflect_Field::clazz(reflected); 428 klassOop k = java_lang_Class::as_klassOop(mirror); 429 int slot = java_lang_reflect_Field::slot(reflected); 430 int modifiers = java_lang_reflect_Field::modifiers(reflected); 431 432 KlassHandle k1(THREAD, k); 433 // Make sure class is initialized before handing id's out to fields 434 Klass::cast(k1())->initialize(CHECK_NULL); 435 436 // First check if this is a static field 437 if (modifiers & JVM_ACC_STATIC) { 438 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); 439 JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); 440 assert(id != NULL, "corrupt Field object"); 441 debug_only(id->set_is_static_field_id();) 442 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop 443 ret = jfieldIDWorkaround::to_static_jfieldID(id); 444 return ret; 445 } 446 447 // The slot is the index of the field description in the field-array 448 // The jfieldID is the offset of the field within the object 449 // It may also have hash bits for k, if VerifyJNIFields is turned on. 450 intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); 451 assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 452 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 453 return ret; 454JNI_END 455 456DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); 457 458JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 459 JNIWrapper("ToReflectedMethod"); 460 DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); 461 jobject ret = NULL; 462 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 463 464 methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); 465 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 466 oop reflection_method; 467 if (m->is_initializer()) { 468 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 469 } else { 470 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); 471 } 472 ret = JNIHandles::make_local(env, reflection_method); 473 return ret; 474JNI_END 475 476DT_RETURN_MARK_DECL(GetSuperclass, jclass); 477 478JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 479 JNIWrapper("GetSuperclass"); 480 DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); 481 jclass obj = NULL; 482 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 483 484 oop mirror = JNIHandles::resolve_non_null(sub); 485 // primitive classes return NULL 486 if (java_lang_Class::is_primitive(mirror)) return NULL; 487 488 // Rules of Class.getSuperClass as implemented by KLass::java_super: 489 // arrays return Object 490 // interfaces return NULL 491 // proper classes return Klass::super() 492 klassOop k = java_lang_Class::as_klassOop(mirror); 493 if (Klass::cast(k)->is_interface()) return NULL; 494 495 // return mirror for superclass 496 klassOop super = Klass::cast(k)->java_super(); 497 // super2 is the value computed by the compiler's getSuperClass intrinsic: 498 debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() 499 ? SystemDictionary::Object_klass() 500 : Klass::cast(k)->super() ) ); 501 assert(super == super2, 502 "java_super computation depends on interface, array, other super"); 503 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); 504 return obj; 505JNI_END 506 507JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 508 JNIWrapper("IsSubclassOf"); 509 DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); 510 oop sub_mirror = JNIHandles::resolve_non_null(sub); 511 oop super_mirror = JNIHandles::resolve_non_null(super); 512 if (java_lang_Class::is_primitive(sub_mirror) || 513 java_lang_Class::is_primitive(super_mirror)) { 514 jboolean ret = (sub_mirror == super_mirror); 515 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); 516 return ret; 517 } 518 klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); 519 klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); 520 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 521 jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? 522 JNI_TRUE : JNI_FALSE; 523 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); 524 return ret; 525JNI_END 526 527DT_RETURN_MARK_DECL(Throw, jint); 528 529JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 530 JNIWrapper("Throw"); 531 DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); 532 jint ret = JNI_OK; 533 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 534 535 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 536 ShouldNotReachHere(); 537JNI_END 538 539DT_RETURN_MARK_DECL(ThrowNew, jint); 540 541JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 542 JNIWrapper("ThrowNew"); 543 DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); 544 jint ret = JNI_OK; 545 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 546 547 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 548 symbolHandle name = symbolHandle(THREAD, k->name()); 549 Handle class_loader (THREAD, k->class_loader()); 550 Handle protection_domain (THREAD, k->protection_domain()); 551 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 552 ShouldNotReachHere(); 553JNI_END 554 555 556// JNI functions only transform a pending async exception to a synchronous 557// exception in ExceptionOccurred and ExceptionCheck calls, since 558// delivering an async exception in other places won't change the native 559// code's control flow and would be harmful when native code further calls 560// JNI functions with a pending exception. Async exception is also checked 561// during the call, so ExceptionOccurred/ExceptionCheck won't return 562// false but deliver the async exception at the very end during 563// state transition. 564 565static void jni_check_async_exceptions(JavaThread *thread) { 566 assert(thread == Thread::current(), "must be itself"); 567 thread->check_and_handle_async_exceptions(); 568} 569 570JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 571 JNIWrapper("ExceptionOccurred"); 572 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); 573 jni_check_async_exceptions(thread); 574 oop exception = thread->pending_exception(); 575 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 576 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); 577 return ret; 578JNI_END 579 580 581JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 582 JNIWrapper("ExceptionDescribe"); 583 DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); 584 if (thread->has_pending_exception()) { 585 Handle ex(thread, thread->pending_exception()); 586 thread->clear_pending_exception(); 587 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 588 // Don't print anything if we are being killed. 589 } else { 590 jio_fprintf(defaultStream::error_stream(), "Exception "); 591 if (thread != NULL && thread->threadObj() != NULL) { 592 ResourceMark rm(THREAD); 593 jio_fprintf(defaultStream::error_stream(), 594 "in thread \"%s\" ", thread->get_thread_name()); 595 } 596 if (ex->is_a(SystemDictionary::Throwable_klass())) { 597 JavaValue result(T_VOID); 598 JavaCalls::call_virtual(&result, 599 ex, 600 KlassHandle(THREAD, 601 SystemDictionary::Throwable_klass()), 602 vmSymbolHandles::printStackTrace_name(), 603 vmSymbolHandles::void_method_signature(), 604 THREAD); 605 // If an exception is thrown in the call it gets thrown away. Not much 606 // we can do with it. The native code that calls this, does not check 607 // for the exception - hence, it might still be in the thread when DestroyVM gets 608 // called, potentially causing a few asserts to trigger - since no pending exception 609 // is expected. 610 CLEAR_PENDING_EXCEPTION; 611 } else { 612 ResourceMark rm(THREAD); 613 jio_fprintf(defaultStream::error_stream(), 614 ". Uncaught exception of type %s.", 615 Klass::cast(ex->klass())->external_name()); 616 } 617 } 618 } 619 DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); 620JNI_END 621 622 623JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 624 JNIWrapper("ExceptionClear"); 625 DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); 626 627 // The jni code might be using this API to clear java thrown exception. 628 // So just mark jvmti thread exception state as exception caught. 629 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 630 if (state != NULL && state->is_exception_detected()) { 631 state->set_exception_caught(); 632 } 633 thread->clear_pending_exception(); 634 DTRACE_PROBE(hotspot_jni, ExceptionClear__return); 635JNI_END 636 637 638JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 639 JNIWrapper("FatalError"); 640 DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); 641 tty->print_cr("FATAL ERROR in native method: %s", msg); 642 thread->print_stack(); 643 os::abort(); // Dump core and abort 644JNI_END 645 646 647JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 648 JNIWrapper("PushLocalFrame"); 649 DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); 650 //%note jni_11 651 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { 652 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); 653 return JNI_ERR; 654 } 655 JNIHandleBlock* old_handles = thread->active_handles(); 656 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 657 assert(new_handles != NULL, "should not be NULL"); 658 new_handles->set_pop_frame_link(old_handles); 659 thread->set_active_handles(new_handles); 660 jint ret = JNI_OK; 661 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); 662 return ret; 663JNI_END 664 665 666JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 667 JNIWrapper("PopLocalFrame"); 668 DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); 669 //%note jni_11 670 Handle result_handle(thread, JNIHandles::resolve(result)); 671 JNIHandleBlock* old_handles = thread->active_handles(); 672 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 673 if (new_handles != NULL) { 674 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 675 // This way code will still work if PopLocalFrame is called without a corresponding 676 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 677 // the release_block call will release the blocks. 678 thread->set_active_handles(new_handles); 679 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 680 JNIHandleBlock::release_block(old_handles, thread); // may block 681 result = JNIHandles::make_local(thread, result_handle()); 682 } 683 DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); 684 return result; 685JNI_END 686 687 688JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 689 JNIWrapper("NewGlobalRef"); 690 DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); 691 Handle ref_handle(thread, JNIHandles::resolve(ref)); 692 jobject ret = JNIHandles::make_global(ref_handle); 693 DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); 694 return ret; 695JNI_END 696 697// Must be JNI_ENTRY (with HandleMark) 698JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 699 JNIWrapper("DeleteGlobalRef"); 700 DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); 701 JNIHandles::destroy_global(ref); 702 DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); 703JNI_END 704 705JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 706 JNIWrapper("DeleteLocalRef"); 707 DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); 708 JNIHandles::destroy_local(obj); 709 DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); 710JNI_END 711 712JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 713 JNIWrapper("IsSameObject"); 714 DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); 715 oop a = JNIHandles::resolve(r1); 716 oop b = JNIHandles::resolve(r2); 717 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 718 DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); 719 return ret; 720JNI_END 721 722 723JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 724 JNIWrapper("NewLocalRef"); 725 DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); 726 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 727 DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); 728 return ret; 729JNI_END 730 731JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 732 JNIWrapper("EnsureLocalCapacity"); 733 DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); 734 jint ret; 735 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { 736 ret = JNI_OK; 737 } else { 738 ret = JNI_ERR; 739 } 740 DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); 741 return ret; 742JNI_END 743 744// Return the Handle Type 745JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 746 JNIWrapper("GetObjectRefType"); 747 DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); 748 jobjectRefType ret; 749 if (JNIHandles::is_local_handle(thread, obj) || 750 JNIHandles::is_frame_handle(thread, obj)) 751 ret = JNILocalRefType; 752 else if (JNIHandles::is_global_handle(obj)) 753 ret = JNIGlobalRefType; 754 else if (JNIHandles::is_weak_global_handle(obj)) 755 ret = JNIWeakGlobalRefType; 756 else 757 ret = JNIInvalidRefType; 758 DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); 759 return ret; 760JNI_END 761 762 763class JNI_ArgumentPusher : public SignatureIterator { 764 protected: 765 JavaCallArguments* _arguments; 766 767 virtual void get_bool () = 0; 768 virtual void get_char () = 0; 769 virtual void get_short () = 0; 770 virtual void get_byte () = 0; 771 virtual void get_int () = 0; 772 virtual void get_long () = 0; 773 virtual void get_float () = 0; 774 virtual void get_double () = 0; 775 virtual void get_object () = 0; 776 777 JNI_ArgumentPusher(Thread *thread, symbolOop signature) 778 : SignatureIterator(thread, signature) { 779 this->_return_type = T_ILLEGAL; 780 _arguments = NULL; 781 } 782 783 public: 784 virtual void iterate( uint64_t fingerprint ) = 0; 785 786 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 787 788 inline void do_bool() { if (!is_return_type()) get_bool(); } 789 inline void do_char() { if (!is_return_type()) get_char(); } 790 inline void do_short() { if (!is_return_type()) get_short(); } 791 inline void do_byte() { if (!is_return_type()) get_byte(); } 792 inline void do_int() { if (!is_return_type()) get_int(); } 793 inline void do_long() { if (!is_return_type()) get_long(); } 794 inline void do_float() { if (!is_return_type()) get_float(); } 795 inline void do_double() { if (!is_return_type()) get_double(); } 796 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 797 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 798 inline void do_void() { } 799 800 JavaCallArguments* arguments() { return _arguments; } 801 void push_receiver(Handle h) { _arguments->push_oop(h); } 802}; 803 804 805class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 806 protected: 807 va_list _ap; 808 809 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 810 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 811 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 812 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 813 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 814 815 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 816 817 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 818 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 819 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 820 inline void get_object() { jobject l = va_arg(_ap, jobject); 821 _arguments->push_oop(Handle((oop *)l, false)); } 822 823 inline void set_ap(va_list rap) { 824#ifdef va_copy 825 va_copy(_ap, rap); 826#elif defined (__va_copy) 827 __va_copy(_ap, rap); 828#else 829 _ap = rap; 830#endif 831 } 832 833 public: 834 JNI_ArgumentPusherVaArg(Thread *thread, symbolOop signature, va_list rap) 835 : JNI_ArgumentPusher(thread, signature) { 836 set_ap(rap); 837 } 838 JNI_ArgumentPusherVaArg(Thread *thread, jmethodID method_id, va_list rap) 839 : JNI_ArgumentPusher(thread, JNIHandles::resolve_jmethod_id(method_id)->signature()) { 840 set_ap(rap); 841 } 842 843 // Optimized path if we have the bitvector form of signature 844 void iterate( uint64_t fingerprint ) { 845 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments 846 else { 847 _return_type = (BasicType)((fingerprint >> static_feature_size) & 848 result_feature_mask); 849 850 assert(fingerprint, "Fingerprint should not be 0"); 851 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 852 while ( 1 ) { 853 switch ( fingerprint & parameter_feature_mask ) { 854 case bool_parm: 855 case char_parm: 856 case short_parm: 857 case byte_parm: 858 case int_parm: 859 get_int(); 860 break; 861 case obj_parm: 862 get_object(); 863 break; 864 case long_parm: 865 get_long(); 866 break; 867 case float_parm: 868 get_float(); 869 break; 870 case double_parm: 871 get_double(); 872 break; 873 case done_parm: 874 return; 875 break; 876 default: 877 ShouldNotReachHere(); 878 break; 879 } 880 fingerprint >>= parameter_feature_size; 881 } 882 } 883 } 884}; 885 886 887class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 888 protected: 889 const jvalue *_ap; 890 891 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 892 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 893 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 894 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 895 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 896 897 inline void get_long() { _arguments->push_long((_ap++)->j); } 898 inline void get_float() { _arguments->push_float((_ap++)->f); } 899 inline void get_double() { _arguments->push_double((_ap++)->d);} 900 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 901 902 inline void set_ap(const jvalue *rap) { _ap = rap; } 903 904 public: 905 JNI_ArgumentPusherArray(Thread *thread, symbolOop signature, const jvalue *rap) 906 : JNI_ArgumentPusher(thread, signature) { 907 set_ap(rap); 908 } 909 JNI_ArgumentPusherArray(Thread *thread, jmethodID method_id, const jvalue *rap) 910 : JNI_ArgumentPusher(thread, JNIHandles::resolve_jmethod_id(method_id)->signature()) { 911 set_ap(rap); 912 } 913 914 // Optimized path if we have the bitvector form of signature 915 void iterate( uint64_t fingerprint ) { 916 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments 917 else { 918 _return_type = (BasicType)((fingerprint >> static_feature_size) & 919 result_feature_mask); 920 assert(fingerprint, "Fingerprint should not be 0"); 921 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 922 while ( 1 ) { 923 switch ( fingerprint & parameter_feature_mask ) { 924 case bool_parm: 925 get_bool(); 926 break; 927 case char_parm: 928 get_char(); 929 break; 930 case short_parm: 931 get_short(); 932 break; 933 case byte_parm: 934 get_byte(); 935 break; 936 case int_parm: 937 get_int(); 938 break; 939 case obj_parm: 940 get_object(); 941 break; 942 case long_parm: 943 get_long(); 944 break; 945 case float_parm: 946 get_float(); 947 break; 948 case double_parm: 949 get_double(); 950 break; 951 case done_parm: 952 return; 953 break; 954 default: 955 ShouldNotReachHere(); 956 break; 957 } 958 fingerprint >>= parameter_feature_size; 959 } 960 } 961 } 962}; 963 964 965enum JNICallType { 966 JNI_STATIC, 967 JNI_VIRTUAL, 968 JNI_NONVIRTUAL 969}; 970 971static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { 972 assert(!method.is_null() , "method should not be null"); 973 974 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) 975 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); 976 KlassHandle spec_klass (THREAD, method->method_holder()); 977 symbolHandle name (THREAD, method->name()); 978 symbolHandle signature (THREAD, method->signature()); 979 CallInfo info; 980 LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); 981 return info.selected_method(); 982} 983 984static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { 985 assert(!method.is_null() , "method should not be null"); 986 987 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) 988 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); 989 KlassHandle spec_klass (THREAD, method->method_holder()); 990 symbolHandle name (THREAD, method->name()); 991 symbolHandle signature (THREAD, method->signature()); 992 CallInfo info; 993 LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); 994 return info.selected_method(); 995} 996 997 998 999static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1000 methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); 1001 1002 // Create object to hold arguments for the JavaCall, and associate it with 1003 // the jni parser 1004 ResourceMark rm(THREAD); 1005 int number_of_parameters = method->size_of_parameters(); 1006 JavaCallArguments java_args(number_of_parameters); 1007 args->set_java_argument_object(&java_args); 1008 1009 assert(method->is_static(), "method should be static"); 1010 1011 // Fill out JavaCallArguments object 1012 args->iterate( Fingerprinter(THREAD, method).fingerprint() ); 1013 // Initialize result type 1014 result->set_type(args->get_ret_type()); 1015 1016 // Invoke the method. Result is returned as oop. 1017 JavaCalls::call(result, method, &java_args, CHECK); 1018 1019 // Convert result 1020 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1021 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1022 } 1023} 1024 1025 1026static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1027 oop recv = JNIHandles::resolve(receiver); 1028 if (recv == NULL) { 1029 THROW(vmSymbols::java_lang_NullPointerException()); 1030 } 1031 Handle h_recv(THREAD, recv); 1032 1033 int number_of_parameters; 1034 methodOop selected_method; 1035 { 1036 methodOop m = JNIHandles::resolve_jmethod_id(method_id); 1037 number_of_parameters = m->size_of_parameters(); 1038 klassOop holder = m->method_holder(); 1039 if (!(Klass::cast(holder))->is_interface()) { 1040 // non-interface call -- for that little speed boost, don't handlize 1041 debug_only(No_Safepoint_Verifier nosafepoint;) 1042 if (call_type == JNI_VIRTUAL) { 1043 // jni_GetMethodID makes sure class is linked and initialized 1044 // so m should have a valid vtable index. 1045 int vtbl_index = m->vtable_index(); 1046 if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { 1047 klassOop k = h_recv->klass(); 1048 // k might be an arrayKlassOop but all vtables start at 1049 // the same place. The cast is to avoid virtual call and assertion. 1050 instanceKlass *ik = (instanceKlass*)k->klass_part(); 1051 selected_method = ik->method_at_vtable(vtbl_index); 1052 } else { 1053 // final method 1054 selected_method = m; 1055 } 1056 } else { 1057 // JNI_NONVIRTUAL call 1058 selected_method = m; 1059 } 1060 } else { 1061 // interface call 1062 KlassHandle h_holder(THREAD, holder); 1063 1064 int itbl_index = m->cached_itable_index(); 1065 if (itbl_index == -1) { 1066 itbl_index = klassItable::compute_itable_index(m); 1067 m->set_cached_itable_index(itbl_index); 1068 // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again 1069 } 1070 klassOop k = h_recv->klass(); 1071 selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1072 } 1073 } 1074 1075 methodHandle method(THREAD, selected_method); 1076 1077 // Create object to hold arguments for the JavaCall, and associate it with 1078 // the jni parser 1079 ResourceMark rm(THREAD); 1080 JavaCallArguments java_args(number_of_parameters); 1081 args->set_java_argument_object(&java_args); 1082 1083 // handle arguments 1084 assert(!method->is_static(), "method should not be static"); 1085 args->push_receiver(h_recv); // Push jobject handle 1086 1087 // Fill out JavaCallArguments object 1088 args->iterate( Fingerprinter(THREAD, method).fingerprint() ); 1089 // Initialize result type 1090 result->set_type(args->get_ret_type()); 1091 1092 // Invoke the method. Result is returned as oop. 1093 JavaCalls::call(result, method, &java_args, CHECK); 1094 1095 // Convert result 1096 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1097 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1098 } 1099} 1100 1101 1102static instanceOop alloc_object(jclass clazz, TRAPS) { 1103 KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 1104 Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); 1105 instanceKlass::cast(k())->initialize(CHECK_NULL); 1106 instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); 1107 return ih; 1108} 1109 1110DT_RETURN_MARK_DECL(AllocObject, jobject); 1111 1112JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1113 JNIWrapper("AllocObject"); 1114 1115 DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); 1116 jobject ret = NULL; 1117 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1118 1119 instanceOop i = alloc_object(clazz, CHECK_NULL); 1120 ret = JNIHandles::make_local(env, i); 1121 return ret; 1122JNI_END 1123 1124DT_RETURN_MARK_DECL(NewObjectA, jobject); 1125 1126JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1127 JNIWrapper("NewObjectA"); 1128 DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); 1129 jobject obj = NULL; 1130 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1131 1132 instanceOop i = alloc_object(clazz, CHECK_NULL); 1133 obj = JNIHandles::make_local(env, i); 1134 JavaValue jvalue(T_VOID); 1135 JNI_ArgumentPusherArray ap(THREAD, methodID, args); 1136 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1137 return obj; 1138JNI_END 1139 1140DT_RETURN_MARK_DECL(NewObjectV, jobject); 1141 1142JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1143 JNIWrapper("NewObjectV"); 1144 DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); 1145 jobject obj = NULL; 1146 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1147 1148 instanceOop i = alloc_object(clazz, CHECK_NULL); 1149 obj = JNIHandles::make_local(env, i); 1150 JavaValue jvalue(T_VOID); 1151 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1152 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1153 return obj; 1154JNI_END 1155 1156DT_RETURN_MARK_DECL(NewObject, jobject); 1157 1158JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1159 JNIWrapper("NewObject"); 1160 DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); 1161 jobject obj = NULL; 1162 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1163 1164 instanceOop i = alloc_object(clazz, CHECK_NULL); 1165 obj = JNIHandles::make_local(env, i); 1166 va_list args; 1167 va_start(args, methodID); 1168 JavaValue jvalue(T_VOID); 1169 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1170 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1171 va_end(args); 1172 return obj; 1173JNI_END 1174 1175 1176JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1177 JNIWrapper("GetObjectClass"); 1178 DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); 1179 klassOop k = JNIHandles::resolve_non_null(obj)->klass(); 1180 jclass ret = 1181 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 1182 DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); 1183 return ret; 1184JNI_END 1185 1186JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1187 JNIWrapper("IsInstanceOf"); 1188 DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); 1189 jboolean ret = JNI_TRUE; 1190 if (obj != NULL) { 1191 ret = JNI_FALSE; 1192 klassOop k = java_lang_Class::as_klassOop( 1193 JNIHandles::resolve_non_null(clazz)); 1194 if (k != NULL) { 1195 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1196 } 1197 } 1198 DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); 1199 return ret; 1200JNI_END 1201 1202 1203static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1204 const char *sig, bool is_static, TRAPS) { 1205 // %%%% This code should probably just call into a method in the LinkResolver 1206 // 1207 // The class should have been loaded (we have an instance of the class 1208 // passed in) so the method and signature should already be in the symbol 1209 // table. If they're not there, the method doesn't exist. 1210 symbolHandle signature = 1211 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); 1212 symbolHandle name; 1213 if (name_str == NULL) { 1214 name = vmSymbolHandles::object_initializer_name(); 1215 } else { 1216 name = symbolHandle(THREAD, 1217 SymbolTable::probe(name_str, (int)strlen(name_str))); 1218 } 1219 if (name.is_null() || signature.is_null()) { 1220 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1221 } 1222 1223 // Throw a NoSuchMethodError exception if we have an instance of a 1224 // primitive java.lang.Class 1225 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1226 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1227 } 1228 1229 KlassHandle klass(THREAD, 1230 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 1231 1232 // Make sure class is linked and initialized before handing id's out to 1233 // methodOops. 1234 Klass::cast(klass())->initialize(CHECK_NULL); 1235 1236 methodOop m; 1237 if (name() == vmSymbols::object_initializer_name() || 1238 name() == vmSymbols::class_initializer_name()) { 1239 // Never search superclasses for constructors 1240 if (klass->oop_is_instance()) { 1241 m = instanceKlass::cast(klass())->find_method(name(), signature()); 1242 } else { 1243 m = NULL; 1244 } 1245 } else { 1246 m = klass->lookup_method(name(), signature()); 1247 // Look up interfaces 1248 if (m == NULL && klass->oop_is_instance()) { 1249 m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name(), 1250 signature()); 1251 } 1252 } 1253 if (m == NULL || (m->is_static() != is_static)) { 1254 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1255 } 1256 return m->jmethod_id(); 1257} 1258 1259 1260JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1261 const char *name, const char *sig)) 1262 JNIWrapper("GetMethodID"); 1263 DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); 1264 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1265 DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); 1266 return ret; 1267JNI_END 1268 1269 1270JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1271 const char *name, const char *sig)) 1272 JNIWrapper("GetStaticMethodID"); 1273 DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); 1274 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1275 DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); 1276 return ret; 1277JNI_END 1278 1279 1280 1281// 1282// Calling Methods 1283// 1284 1285 1286#define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ 1287\ 1288 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ 1289 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ 1290 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ 1291\ 1292JNI_ENTRY(ResultType, \ 1293 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1294 JNIWrapper("Call" XSTR(Result) "Method"); \ 1295\ 1296 DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ 1297 ResultType ret = 0;\ 1298 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1299 (const ResultType&)ret);\ 1300\ 1301 va_list args; \ 1302 va_start(args, methodID); \ 1303 JavaValue jvalue(Tag); \ 1304 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ 1305 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1306 va_end(args); \ 1307 ret = jvalue.get_##ResultType(); \ 1308 return ret;\ 1309JNI_END \ 1310\ 1311\ 1312JNI_ENTRY(ResultType, \ 1313 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1314 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1315\ 1316 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ 1317 ResultType ret = 0;\ 1318 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1319 (const ResultType&)ret);\ 1320\ 1321 JavaValue jvalue(Tag); \ 1322 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ 1323 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1324 ret = jvalue.get_##ResultType(); \ 1325 return ret;\ 1326JNI_END \ 1327\ 1328\ 1329JNI_ENTRY(ResultType, \ 1330 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1331 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1332 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ 1333 ResultType ret = 0;\ 1334 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1335 (const ResultType&)ret);\ 1336\ 1337 JavaValue jvalue(Tag); \ 1338 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ 1339 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1340 ret = jvalue.get_##ResultType(); \ 1341 return ret;\ 1342JNI_END 1343 1344// the runtime type of subword integral basic types is integer 1345DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) 1346DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) 1347DEFINE_CALLMETHOD(jchar, Char, T_CHAR) 1348DEFINE_CALLMETHOD(jshort, Short, T_SHORT) 1349 1350DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) 1351DEFINE_CALLMETHOD(jint, Int, T_INT) 1352DEFINE_CALLMETHOD(jlong, Long, T_LONG) 1353DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) 1354DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) 1355 1356DT_VOID_RETURN_MARK_DECL(CallVoidMethod); 1357DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); 1358DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); 1359 1360JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1361 JNIWrapper("CallVoidMethod"); 1362 DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); 1363 DT_VOID_RETURN_MARK(CallVoidMethod); 1364 1365 va_list args; 1366 va_start(args, methodID); 1367 JavaValue jvalue(T_VOID); 1368 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1369 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1370 va_end(args); 1371JNI_END 1372 1373 1374JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1375 JNIWrapper("CallVoidMethodV"); 1376 DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); 1377 DT_VOID_RETURN_MARK(CallVoidMethodV); 1378 1379 JavaValue jvalue(T_VOID); 1380 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1381 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1382JNI_END 1383 1384 1385JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1386 JNIWrapper("CallVoidMethodA"); 1387 DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); 1388 DT_VOID_RETURN_MARK(CallVoidMethodA); 1389 1390 JavaValue jvalue(T_VOID); 1391 JNI_ArgumentPusherArray ap(THREAD, methodID, args); 1392 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1393JNI_END 1394 1395 1396#define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ 1397\ 1398 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ 1399 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ 1400 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ 1401\ 1402JNI_ENTRY(ResultType, \ 1403 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1404 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1405\ 1406 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ 1407 ResultType ret;\ 1408 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1409 (const ResultType&)ret);\ 1410\ 1411 va_list args; \ 1412 va_start(args, methodID); \ 1413 JavaValue jvalue(Tag); \ 1414 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ 1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1416 va_end(args); \ 1417 ret = jvalue.get_##ResultType(); \ 1418 return ret;\ 1419JNI_END \ 1420\ 1421JNI_ENTRY(ResultType, \ 1422 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1423 JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ 1424 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ 1425 ResultType ret;\ 1426 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1427 (const ResultType&)ret);\ 1428\ 1429 JavaValue jvalue(Tag); \ 1430 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ 1431 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1432 ret = jvalue.get_##ResultType(); \ 1433 return ret;\ 1434JNI_END \ 1435\ 1436JNI_ENTRY(ResultType, \ 1437 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1438 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1439 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ 1440 ResultType ret;\ 1441 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1442 (const ResultType&)ret);\ 1443\ 1444 JavaValue jvalue(Tag); \ 1445 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ 1446 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1447 ret = jvalue.get_##ResultType(); \ 1448 return ret;\ 1449JNI_END 1450 1451// the runtime type of subword integral basic types is integer 1452DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) 1453DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) 1454DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) 1455DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) 1456 1457DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) 1458DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) 1459DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) 1460DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) 1461DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) 1462 1463 1464DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); 1465DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); 1466DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); 1467 1468JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1469 JNIWrapper("CallNonvirtualVoidMethod"); 1470 1471 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, 1472 env, obj, cls, methodID); 1473 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1474 1475 va_list args; 1476 va_start(args, methodID); 1477 JavaValue jvalue(T_VOID); 1478 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1479 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1480 va_end(args); 1481JNI_END 1482 1483 1484JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1485 JNIWrapper("CallNonvirtualVoidMethodV"); 1486 1487 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, 1488 env, obj, cls, methodID); 1489 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1490 1491 JavaValue jvalue(T_VOID); 1492 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1493 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1494JNI_END 1495 1496 1497JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1498 JNIWrapper("CallNonvirtualVoidMethodA"); 1499 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, 1500 env, obj, cls, methodID); 1501 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1502 JavaValue jvalue(T_VOID); 1503 JNI_ArgumentPusherArray ap(THREAD, methodID, args); 1504 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1505JNI_END 1506 1507 1508#define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ 1509\ 1510 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ 1511 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ 1512 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ 1513\ 1514JNI_ENTRY(ResultType, \ 1515 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1516 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1517\ 1518 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ 1519 ResultType ret = 0;\ 1520 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1521 (const ResultType&)ret);\ 1522\ 1523 va_list args; \ 1524 va_start(args, methodID); \ 1525 JavaValue jvalue(Tag); \ 1526 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ 1527 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1528 va_end(args); \ 1529 ret = jvalue.get_##ResultType(); \ 1530 return ret;\ 1531JNI_END \ 1532\ 1533JNI_ENTRY(ResultType, \ 1534 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1535 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1536 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ 1537 ResultType ret = 0;\ 1538 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1539 (const ResultType&)ret);\ 1540\ 1541 JavaValue jvalue(Tag); \ 1542 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); \ 1543 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1544 ret = jvalue.get_##ResultType(); \ 1545 return ret;\ 1546JNI_END \ 1547\ 1548JNI_ENTRY(ResultType, \ 1549 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1550 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1551 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ 1552 ResultType ret = 0;\ 1553 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1554 (const ResultType&)ret);\ 1555\ 1556 JavaValue jvalue(Tag); \ 1557 JNI_ArgumentPusherArray ap(THREAD, methodID, args); \ 1558 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1559 ret = jvalue.get_##ResultType(); \ 1560 return ret;\ 1561JNI_END 1562 1563// the runtime type of subword integral basic types is integer 1564DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) 1565DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) 1566DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) 1567DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) 1568 1569DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) 1570DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) 1571DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) 1572DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) 1573DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) 1574 1575 1576DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); 1577DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); 1578DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); 1579 1580JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1581 JNIWrapper("CallStaticVoidMethod"); 1582 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); 1583 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1584 1585 va_list args; 1586 va_start(args, methodID); 1587 JavaValue jvalue(T_VOID); 1588 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1589 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1590 va_end(args); 1591JNI_END 1592 1593 1594JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1595 JNIWrapper("CallStaticVoidMethodV"); 1596 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); 1597 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1598 1599 JavaValue jvalue(T_VOID); 1600 JNI_ArgumentPusherVaArg ap(THREAD, methodID, args); 1601 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1602JNI_END 1603 1604 1605JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 1606 JNIWrapper("CallStaticVoidMethodA"); 1607 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); 1608 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 1609 1610 JavaValue jvalue(T_VOID); 1611 JNI_ArgumentPusherArray ap(THREAD, methodID, args); 1612 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1613JNI_END 1614 1615 1616// 1617// Accessing Fields 1618// 1619 1620 1621DT_RETURN_MARK_DECL(GetFieldID, jfieldID); 1622 1623JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 1624 const char *name, const char *sig)) 1625 JNIWrapper("GetFieldID"); 1626 DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); 1627 jfieldID ret = 0; 1628 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 1629 1630 // The class should have been loaded (we have an instance of the class 1631 // passed in) so the field and signature should already be in the symbol 1632 // table. If they're not there, the field doesn't exist. 1633 symbolHandle fieldname = 1634 symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name))); 1635 symbolHandle signame = 1636 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); 1637 if (fieldname.is_null() || signame.is_null()) { 1638 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 1639 } 1640 KlassHandle k(THREAD, 1641 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 1642 // Make sure class is initialized before handing id's out to fields 1643 Klass::cast(k())->initialize(CHECK_NULL); 1644 1645 fieldDescriptor fd; 1646 if (!Klass::cast(k())->oop_is_instance() || 1647 !instanceKlass::cast(k())->find_field(fieldname(), signame(), false, &fd)) { 1648 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 1649 } 1650 1651 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 1652 // It may also have hash bits for k, if VerifyJNIFields is turned on. 1653 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 1654 return ret; 1655JNI_END 1656 1657 1658JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 1659 JNIWrapper("GetObjectField"); 1660 DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); 1661 oop o = JNIHandles::resolve_non_null(obj); 1662 klassOop k = o->klass(); 1663 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1664 // Keep JVMTI addition small and only check enabled flag here. 1665 // jni_GetField_probe() assumes that is okay to create handles. 1666 if (JvmtiExport::should_post_field_access()) { 1667 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 1668 } 1669 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 1670 DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); 1671 return ret; 1672JNI_END 1673 1674 1675#define DEFINE_GETFIELD(Return,Fieldname,Result) \ 1676\ 1677 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ 1678\ 1679JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 1680 JNIWrapper("Get" XSTR(Result) "Field"); \ 1681\ 1682 DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ 1683 Return ret = 0;\ 1684 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 1685\ 1686 oop o = JNIHandles::resolve_non_null(obj); \ 1687 klassOop k = o->klass(); \ 1688 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1689 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1690 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 1691 /* and creates a ResetNoHandleMark. */ \ 1692 if (JvmtiExport::should_post_field_access()) { \ 1693 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 1694 } \ 1695 ret = o->Fieldname##_field(offset); \ 1696 return ret; \ 1697JNI_END 1698 1699DEFINE_GETFIELD(jboolean, bool, Boolean) 1700DEFINE_GETFIELD(jbyte, byte, Byte) 1701DEFINE_GETFIELD(jchar, char, Char) 1702DEFINE_GETFIELD(jshort, short, Short) 1703DEFINE_GETFIELD(jint, int, Int) 1704DEFINE_GETFIELD(jlong, long, Long) 1705DEFINE_GETFIELD(jfloat, float, Float) 1706DEFINE_GETFIELD(jdouble, double, Double) 1707 1708address jni_GetBooleanField_addr() { 1709 return (address)jni_GetBooleanField; 1710} 1711address jni_GetByteField_addr() { 1712 return (address)jni_GetByteField; 1713} 1714address jni_GetCharField_addr() { 1715 return (address)jni_GetCharField; 1716} 1717address jni_GetShortField_addr() { 1718 return (address)jni_GetShortField; 1719} 1720address jni_GetIntField_addr() { 1721 return (address)jni_GetIntField; 1722} 1723address jni_GetLongField_addr() { 1724 return (address)jni_GetLongField; 1725} 1726address jni_GetFloatField_addr() { 1727 return (address)jni_GetFloatField; 1728} 1729address jni_GetDoubleField_addr() { 1730 return (address)jni_GetDoubleField; 1731} 1732 1733JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 1734 JNIWrapper("SetObjectField"); 1735 DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); 1736 oop o = JNIHandles::resolve_non_null(obj); 1737 klassOop k = o->klass(); 1738 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1739 // Keep JVMTI addition small and only check enabled flag here. 1740 // jni_SetField_probe_nh() assumes that is not okay to create handles 1741 // and creates a ResetNoHandleMark. 1742 if (JvmtiExport::should_post_field_modification()) { 1743 jvalue field_value; 1744 field_value.l = value; 1745 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 1746 } 1747 o->obj_field_put(offset, JNIHandles::resolve(value)); 1748 DTRACE_PROBE(hotspot_jni, SetObjectField__return); 1749JNI_END 1750 1751#define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ 1752\ 1753JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 1754 JNIWrapper("Set" XSTR(Result) "Field"); \ 1755\ 1756 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ 1757 ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ 1758 HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ 1759 ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ 1760\ 1761 oop o = JNIHandles::resolve_non_null(obj); \ 1762 klassOop k = o->klass(); \ 1763 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 1764 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1765 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 1766 /* and creates a ResetNoHandleMark. */ \ 1767 if (JvmtiExport::should_post_field_modification()) { \ 1768 jvalue field_value; \ 1769 field_value.unionType = value; \ 1770 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 1771 } \ 1772 o->Fieldname##_field_put(offset, value); \ 1773 DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ 1774JNI_END 1775 1776DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) 1777DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) 1778DEFINE_SETFIELD(jchar, char, Char, 'C', c) 1779DEFINE_SETFIELD(jshort, short, Short, 'S', s) 1780DEFINE_SETFIELD(jint, int, Int, 'I', i) 1781DEFINE_SETFIELD(jlong, long, Long, 'J', j) 1782DEFINE_SETFIELD(jfloat, float, Float, 'F', f) 1783DEFINE_SETFIELD(jdouble, double, Double, 'D', d) 1784 1785DT_RETURN_MARK_DECL(ToReflectedField, jobject); 1786 1787JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 1788 JNIWrapper("ToReflectedField"); 1789 DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, 1790 env, cls, fieldID, isStatic); 1791 jobject ret = NULL; 1792 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 1793 1794 fieldDescriptor fd; 1795 bool found = false; 1796 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1797 1798 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 1799 1800 if (isStatic) { 1801 // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. 1802 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 1803 assert(id->is_static_field_id(), "invalid static field id"); 1804 found = instanceKlass::cast(id->holder())->find_local_field_from_offset(id->offset(), true, &fd); 1805 } else { 1806 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 1807 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 1808 found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 1809 } 1810 assert(found, "bad fieldID passed into jni_ToReflectedField"); 1811 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1812 ret = JNIHandles::make_local(env, reflected); 1813 return ret; 1814JNI_END 1815 1816 1817// 1818// Accessing Static Fields 1819// 1820DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); 1821 1822JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 1823 const char *name, const char *sig)) 1824 JNIWrapper("GetStaticFieldID"); 1825 DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); 1826 jfieldID ret = NULL; 1827 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 1828 1829 // The class should have been loaded (we have an instance of the class 1830 // passed in) so the field and signature should already be in the symbol 1831 // table. If they're not there, the field doesn't exist. 1832 symbolHandle fieldname = 1833 symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name))); 1834 symbolHandle signame = 1835 symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig))); 1836 if (fieldname.is_null() || signame.is_null()) { 1837 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 1838 } 1839 KlassHandle k(THREAD, 1840 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 1841 // Make sure class is initialized before handing id's out to static fields 1842 Klass::cast(k())->initialize(CHECK_NULL); 1843 1844 fieldDescriptor fd; 1845 if (!Klass::cast(k())->oop_is_instance() || 1846 !instanceKlass::cast(k())->find_field(fieldname(), signame(), true, &fd)) { 1847 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 1848 } 1849 1850 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop 1851 JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); 1852 debug_only(id->set_is_static_field_id();) 1853 1854 debug_only(int first_offset = instanceKlass::cast(fd.field_holder())->offset_of_static_fields();) 1855 debug_only(int end_offset = first_offset + (instanceKlass::cast(fd.field_holder())->static_field_size() * wordSize);) 1856 assert(id->offset() >= first_offset && id->offset() < end_offset, "invalid static field offset"); 1857 1858 ret = jfieldIDWorkaround::to_static_jfieldID(id); 1859 return ret; 1860JNI_END 1861 1862 1863JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 1864 JNIWrapper("GetStaticObjectField"); 1865 DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID); 1866#ifndef JNICHECK_KERNEL 1867 DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);) 1868#endif // JNICHECK_KERNEL 1869 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 1870 assert(id->is_static_field_id(), "invalid static field id"); 1871 // Keep JVMTI addition small and only check enabled flag here. 1872 // jni_GetField_probe() assumes that is okay to create handles. 1873 if (JvmtiExport::should_post_field_access()) { 1874 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 1875 } 1876 jobject ret = JNIHandles::make_local(id->holder()->obj_field(id->offset())); 1877 DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret); 1878 return ret; 1879JNI_END 1880 1881#define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \ 1882\ 1883 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\ 1884\ 1885JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 1886 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 1887 DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\ 1888 Return ret = 0;\ 1889 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 1890 (const Return&)ret);\ 1891 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 1892 assert(id->is_static_field_id(), "invalid static field id"); \ 1893 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1894 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 1895 if (JvmtiExport::should_post_field_access()) { \ 1896 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 1897 } \ 1898 ret = id->holder()-> Fieldname##_field (id->offset()); \ 1899 return ret;\ 1900JNI_END 1901 1902DEFINE_GETSTATICFIELD(jboolean, bool, Boolean) 1903DEFINE_GETSTATICFIELD(jbyte, byte, Byte) 1904DEFINE_GETSTATICFIELD(jchar, char, Char) 1905DEFINE_GETSTATICFIELD(jshort, short, Short) 1906DEFINE_GETSTATICFIELD(jint, int, Int) 1907DEFINE_GETSTATICFIELD(jlong, long, Long) 1908DEFINE_GETSTATICFIELD(jfloat, float, Float) 1909DEFINE_GETSTATICFIELD(jdouble, double, Double) 1910 1911 1912JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 1913 JNIWrapper("SetStaticObjectField"); 1914 DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value); 1915 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 1916 assert(id->is_static_field_id(), "invalid static field id"); 1917 // Keep JVMTI addition small and only check enabled flag here. 1918 // jni_SetField_probe() assumes that is okay to create handles. 1919 if (JvmtiExport::should_post_field_modification()) { 1920 jvalue field_value; 1921 field_value.l = value; 1922 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 1923 } 1924 id->holder()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 1925 DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return); 1926JNI_END 1927 1928 1929#define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \ 1930\ 1931JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 1932 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 1933 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\ 1934 ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ 1935 HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \ 1936 ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ 1937\ 1938 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 1939 assert(id->is_static_field_id(), "invalid static field id"); \ 1940 /* Keep JVMTI addition small and only check enabled flag here. */ \ 1941 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 1942 if (JvmtiExport::should_post_field_modification()) { \ 1943 jvalue field_value; \ 1944 field_value.unionType = value; \ 1945 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 1946 } \ 1947 id->holder()-> Fieldname##_field_put (id->offset(), value); \ 1948 DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ 1949JNI_END 1950 1951DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) 1952DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) 1953DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) 1954DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) 1955DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) 1956DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) 1957DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) 1958DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) 1959 1960 1961// 1962// String Operations 1963// 1964 1965// Unicode Interface 1966 1967DT_RETURN_MARK_DECL(NewString, jstring); 1968 1969JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 1970 JNIWrapper("NewString"); 1971 DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); 1972 jstring ret = NULL; 1973 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 1974 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 1975 ret = (jstring) JNIHandles::make_local(env, string); 1976 return ret; 1977JNI_END 1978 1979 1980JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 1981 JNIWrapper("GetStringLength"); 1982 DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); 1983 jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); 1984 DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); 1985 return ret; 1986JNI_END 1987 1988 1989JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 1990 JNIEnv *env, jstring string, jboolean *isCopy)) 1991 JNIWrapper("GetStringChars"); 1992 DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); 1993 //%note jni_5 1994 if (isCopy != NULL) { 1995 *isCopy = JNI_TRUE; 1996 } 1997 oop s = JNIHandles::resolve_non_null(string); 1998 int s_len = java_lang_String::length(s); 1999 typeArrayOop s_value = java_lang_String::value(s); 2000 int s_offset = java_lang_String::offset(s); 2001 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination 2002 if (s_len > 0) { 2003 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); 2004 } 2005 buf[s_len] = 0; 2006 DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); 2007 return buf; 2008JNI_END 2009 2010 2011JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2012 JNIWrapper("ReleaseStringChars"); 2013 DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); 2014 //%note jni_6 2015 if (chars != NULL) { 2016 // Since String objects are supposed to be immutable, don't copy any 2017 // new data back. A bad user will have to go after the char array. 2018 FreeHeap((void*) chars); 2019 } 2020 DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); 2021JNI_END 2022 2023 2024// UTF Interface 2025 2026DT_RETURN_MARK_DECL(NewStringUTF, jstring); 2027 2028JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2029 JNIWrapper("NewStringUTF"); 2030 DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); 2031 jstring ret; 2032 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2033 2034 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2035 ret = (jstring) JNIHandles::make_local(env, result); 2036 return ret; 2037JNI_END 2038 2039 2040JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2041 JNIWrapper("GetStringUTFLength"); 2042 DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); 2043 jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); 2044 DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); 2045 return ret; 2046JNI_END 2047 2048 2049JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2050 JNIWrapper("GetStringUTFChars"); 2051 DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); 2052 ResourceMark rm; 2053 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(string)); 2054 int length = (int)strlen(str); 2055 char* result = AllocateHeap(length+1, "GetStringUTFChars"); 2056 strcpy(result, str); 2057 if (isCopy != NULL) *isCopy = JNI_TRUE; 2058 DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); 2059 return result; 2060JNI_END 2061 2062 2063JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2064 JNIWrapper("ReleaseStringUTFChars"); 2065 DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); 2066 if (chars != NULL) { 2067 FreeHeap((char*) chars); 2068 } 2069 DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); 2070JNI_END 2071 2072 2073JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2074 JNIWrapper("GetArrayLength"); 2075 DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); 2076 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2077 assert(a->is_array(), "must be array"); 2078 jsize ret = a->length(); 2079 DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); 2080 return ret; 2081JNI_END 2082 2083 2084// 2085// Object Array Operations 2086// 2087 2088DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); 2089 2090JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2091 JNIWrapper("NewObjectArray"); 2092 DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); 2093 jobjectArray ret = NULL; 2094 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2095 KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); 2096 klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); 2097 KlassHandle ak = KlassHandle(THREAD, ako); 2098 objArrayKlass::cast(ak())->initialize(CHECK_NULL); 2099 objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2100 oop initial_value = JNIHandles::resolve(initialElement); 2101 if (initial_value != NULL) { // array already initialized with NULL 2102 for (int index = 0; index < length; index++) { 2103 result->obj_at_put(index, initial_value); 2104 } 2105 } 2106 ret = (jobjectArray) JNIHandles::make_local(env, result); 2107 return ret; 2108JNI_END 2109 2110DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); 2111 2112JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2113 JNIWrapper("GetObjectArrayElement"); 2114 DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); 2115 jobject ret = NULL; 2116 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2117 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2118 if (a->is_within_bounds(index)) { 2119 ret = JNIHandles::make_local(env, a->obj_at(index)); 2120 return ret; 2121 } else { 2122 char buf[jintAsStringSize]; 2123 sprintf(buf, "%d", index); 2124 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2125 } 2126JNI_END 2127 2128DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); 2129 2130JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2131 JNIWrapper("SetObjectArrayElement"); 2132 DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); 2133 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2134 2135 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2136 oop v = JNIHandles::resolve(value); 2137 if (a->is_within_bounds(index)) { 2138 if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { 2139 a->obj_at_put(index, v); 2140 } else { 2141 THROW(vmSymbols::java_lang_ArrayStoreException()); 2142 } 2143 } else { 2144 char buf[jintAsStringSize]; 2145 sprintf(buf, "%d", index); 2146 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2147 } 2148JNI_END 2149 2150 2151#define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ 2152\ 2153 DT_RETURN_MARK_DECL(New##Result##Array, Return);\ 2154\ 2155JNI_ENTRY(Return, \ 2156 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2157 JNIWrapper("New" XSTR(Result) "Array"); \ 2158 DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ 2159 Return ret = NULL;\ 2160 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2161\ 2162 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2163 ret = (Return) JNIHandles::make_local(env, obj); \ 2164 return ret;\ 2165JNI_END 2166 2167DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) 2168DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) 2169DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) 2170DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) 2171DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) 2172DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) 2173DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) 2174DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) 2175 2176 2177// Return an address which will fault if the caller writes to it. 2178 2179static char* get_bad_address() { 2180 static char* bad_address = NULL; 2181 if (bad_address == NULL) { 2182 size_t size = os::vm_allocation_granularity(); 2183 bad_address = os::reserve_memory(size); 2184 if (bad_address != NULL) { 2185 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2186 /*is_committed*/false); 2187 } 2188 } 2189 return bad_address; 2190} 2191 2192 2193#define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ 2194\ 2195JNI_QUICK_ENTRY(ElementType*, \ 2196 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2197 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2198 DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ 2199 /* allocate an chunk of memory in c land */ \ 2200 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2201 ElementType* result; \ 2202 int len = a->length(); \ 2203 if (len == 0) { \ 2204 /* Empty array: legal but useless, can't return NULL. \ 2205 * Return a pointer to something useless. \ 2206 * Avoid asserts in typeArrayOop. */ \ 2207 result = (ElementType*)get_bad_address(); \ 2208 } else { \ 2209 result = NEW_C_HEAP_ARRAY(ElementType, len); \ 2210 /* copy the array to the c chunk */ \ 2211 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2212 } \ 2213 if (isCopy) *isCopy = JNI_TRUE; \ 2214 DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ 2215 return result; \ 2216JNI_END 2217 2218DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) 2219DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) 2220DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) 2221DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) 2222DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) 2223DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) 2224DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) 2225DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) 2226 2227 2228#define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ 2229\ 2230JNI_QUICK_ENTRY(void, \ 2231 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2232 ElementType *buf, jint mode)) \ 2233 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2234 DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ 2235 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2236 int len = a->length(); \ 2237 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2238 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2239 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2240 } \ 2241 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2242 FreeHeap(buf); \ 2243 } \ 2244 } \ 2245 DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ 2246JNI_END 2247 2248DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) 2249DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) 2250DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) 2251DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) 2252DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) 2253DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) 2254DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) 2255DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) 2256 2257#define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ 2258 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ 2259\ 2260JNI_ENTRY(void, \ 2261jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2262 jsize len, ElementType *buf)) \ 2263 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2264 DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ 2265 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2266 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2267 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2268 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2269 } else { \ 2270 if (len > 0) { \ 2271 int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ 2272 memcpy((u_char*) buf, \ 2273 (u_char*) src->Tag##_at_addr(start), \ 2274 len << sc); \ 2275 } \ 2276 } \ 2277JNI_END 2278 2279DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) 2280DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) 2281DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) 2282DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) 2283DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) 2284DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) 2285DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) 2286DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) 2287 2288#define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ 2289 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ 2290\ 2291JNI_ENTRY(void, \ 2292jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2293 jsize len, const ElementType *buf)) \ 2294 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2295 DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ 2296 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2297 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2298 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2299 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2300 } else { \ 2301 if (len > 0) { \ 2302 int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2303 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2304 (u_char*) buf, \ 2305 len << sc); \ 2306 } \ 2307 } \ 2308JNI_END 2309 2310DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) 2311DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) 2312DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) 2313DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) 2314DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) 2315DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) 2316DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) 2317DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) 2318 2319 2320// 2321// Interception of natives 2322// 2323 2324// The RegisterNatives call being attempted tried to register with a method that 2325// is not native. Ask JVM TI what prefixes have been specified. Then check 2326// to see if the native method is now wrapped with the prefixes. See the 2327// SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2328static methodOop find_prefixed_native(KlassHandle k, 2329 symbolHandle name, symbolHandle signature, TRAPS) { 2330 ResourceMark rm(THREAD); 2331 methodOop method; 2332 int name_len = name->utf8_length(); 2333 char* name_str = name->as_utf8(); 2334 int prefix_count; 2335 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2336 for (int i = 0; i < prefix_count; i++) { 2337 char* prefix = prefixes[i]; 2338 int prefix_len = (int)strlen(prefix); 2339 2340 // try adding this prefix to the method name and see if it matches another method name 2341 int trial_len = name_len + prefix_len; 2342 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2343 strcpy(trial_name_str, prefix); 2344 strcat(trial_name_str, name_str); 2345 symbolHandle trial_name(THREAD, SymbolTable::probe(trial_name_str, trial_len)); 2346 if (trial_name.is_null()) { 2347 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2348 } 2349 method = Klass::cast(k())->lookup_method(trial_name(), signature()); 2350 if (method == NULL) { 2351 continue; // signature doesn't match, try the next prefix 2352 } 2353 if (method->is_native()) { 2354 method->set_is_prefixed_native(); 2355 return method; // wahoo, we found a prefixed version of the method, return it 2356 } 2357 // found as non-native, so prefix is good, add it, probably just need more prefixes 2358 name_len = trial_len; 2359 name_str = trial_name_str; 2360 } 2361 return NULL; // not found 2362} 2363 2364static bool register_native(KlassHandle k, symbolHandle name, symbolHandle signature, address entry, TRAPS) { 2365 methodOop method = Klass::cast(k())->lookup_method(name(), signature()); 2366 if (method == NULL) { 2367 ResourceMark rm; 2368 stringStream st; 2369 st.print("Method %s name or signature does not match", 2370 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name(), signature())); 2371 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2372 } 2373 if (!method->is_native()) { 2374 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2375 method = find_prefixed_native(k, name, signature, THREAD); 2376 if (method == NULL) { 2377 ResourceMark rm; 2378 stringStream st; 2379 st.print("Method %s is not declared as native", 2380 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name(), signature())); 2381 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2382 } 2383 } 2384 2385 if (entry != NULL) { 2386 method->set_native_function(entry, 2387 methodOopDesc::native_bind_event_is_interesting); 2388 } else { 2389 method->clear_native_function(); 2390 } 2391 if (PrintJNIResolving) { 2392 ResourceMark rm(THREAD); 2393 tty->print_cr("[Registering JNI native method %s.%s]", 2394 Klass::cast(method->method_holder())->external_name(), 2395 method->name()->as_C_string()); 2396 } 2397 return true; 2398} 2399 2400DT_RETURN_MARK_DECL(RegisterNatives, jint); 2401 2402JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 2403 const JNINativeMethod *methods, 2404 jint nMethods)) 2405 JNIWrapper("RegisterNatives"); 2406 DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); 2407 jint ret = 0; 2408 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 2409 2410 KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 2411 2412 for (int index = 0; index < nMethods; index++) { 2413 const char* meth_name = methods[index].name; 2414 const char* meth_sig = methods[index].signature; 2415 int meth_name_len = (int)strlen(meth_name); 2416 2417 // The class should have been loaded (we have an instance of the class 2418 // passed in) so the method and signature should already be in the symbol 2419 // table. If they're not there, the method doesn't exist. 2420 symbolHandle name(THREAD, SymbolTable::probe(meth_name, meth_name_len)); 2421 symbolHandle signature(THREAD, SymbolTable::probe(meth_sig, (int)strlen(meth_sig))); 2422 2423 if (name.is_null() || signature.is_null()) { 2424 ResourceMark rm; 2425 stringStream st; 2426 st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); 2427 // Must return negative value on failure 2428 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 2429 } 2430 2431 bool res = register_native(h_k, name, signature, 2432 (address) methods[index].fnPtr, THREAD); 2433 if (!res) { 2434 ret = -1; 2435 break; 2436 } 2437 } 2438 return ret; 2439JNI_END 2440 2441 2442JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 2443 JNIWrapper("UnregisterNatives"); 2444 DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); 2445 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); 2446 //%note jni_2 2447 if (Klass::cast(k)->oop_is_instance()) { 2448 for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { 2449 methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); 2450 if (m->is_native()) { 2451 m->clear_native_function(); 2452 m->set_signature_handler(NULL); 2453 } 2454 } 2455 } 2456 DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); 2457 return 0; 2458JNI_END 2459 2460// 2461// Monitor functions 2462// 2463 2464DT_RETURN_MARK_DECL(MonitorEnter, jint); 2465 2466JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 2467 DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); 2468 jint ret = JNI_ERR; 2469 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 2470 2471 // If the object is null, we can't do anything with it 2472 if (jobj == NULL) { 2473 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2474 } 2475 2476 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 2477 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 2478 ret = JNI_OK; 2479 return ret; 2480JNI_END 2481 2482DT_RETURN_MARK_DECL(MonitorExit, jint); 2483 2484JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 2485 DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); 2486 jint ret = JNI_ERR; 2487 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 2488 2489 // Don't do anything with a null object 2490 if (jobj == NULL) { 2491 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 2492 } 2493 2494 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 2495 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 2496 2497 ret = JNI_OK; 2498 return ret; 2499JNI_END 2500 2501// 2502// Extensions 2503// 2504 2505DT_VOID_RETURN_MARK_DECL(GetStringRegion); 2506 2507JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 2508 JNIWrapper("GetStringRegion"); 2509 DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); 2510 DT_VOID_RETURN_MARK(GetStringRegion); 2511 oop s = JNIHandles::resolve_non_null(string); 2512 int s_len = java_lang_String::length(s); 2513 if (start < 0 || len < 0 || start + len > s_len) { 2514 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2515 } else { 2516 if (len > 0) { 2517 int s_offset = java_lang_String::offset(s); 2518 typeArrayOop s_value = java_lang_String::value(s); 2519 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); 2520 } 2521 } 2522JNI_END 2523 2524DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); 2525 2526JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 2527 JNIWrapper("GetStringUTFRegion"); 2528 DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); 2529 DT_VOID_RETURN_MARK(GetStringUTFRegion); 2530 oop s = JNIHandles::resolve_non_null(string); 2531 int s_len = java_lang_String::length(s); 2532 if (start < 0 || len < 0 || start + len > s_len) { 2533 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 2534 } else { 2535 //%note jni_7 2536 if (len > 0) { 2537 ResourceMark rm(THREAD); 2538 char *utf_region = java_lang_String::as_utf8_string(s, start, len); 2539 int utf_len = (int)strlen(utf_region); 2540 memcpy(buf, utf_region, utf_len); 2541 buf[utf_len] = 0; 2542 } else { 2543 // JDK null-terminates the buffer even in len is zero 2544 if (buf != NULL) { 2545 buf[0] = 0; 2546 } 2547 } 2548 } 2549JNI_END 2550 2551 2552JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 2553 JNIWrapper("GetPrimitiveArrayCritical"); 2554 DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); 2555 GC_locker::lock_critical(thread); 2556 if (isCopy != NULL) { 2557 *isCopy = JNI_FALSE; 2558 } 2559 oop a = JNIHandles::resolve_non_null(array); 2560 assert(a->is_array(), "just checking"); 2561 BasicType type; 2562 if (a->is_objArray()) { 2563 type = T_OBJECT; 2564 } else { 2565 type = typeArrayKlass::cast(a->klass())->element_type(); 2566 } 2567 void* ret = arrayOop(a)->base(type); 2568 DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); 2569 return ret; 2570JNI_END 2571 2572 2573JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 2574 JNIWrapper("ReleasePrimitiveArrayCritical"); 2575 DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); 2576 // The array, carray and mode arguments are ignored 2577 GC_locker::unlock_critical(thread); 2578 DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); 2579JNI_END 2580 2581 2582JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 2583 JNIWrapper("GetStringCritical"); 2584 DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); 2585 GC_locker::lock_critical(thread); 2586 if (isCopy != NULL) { 2587 *isCopy = JNI_FALSE; 2588 } 2589 oop s = JNIHandles::resolve_non_null(string); 2590 int s_len = java_lang_String::length(s); 2591 typeArrayOop s_value = java_lang_String::value(s); 2592 int s_offset = java_lang_String::offset(s); 2593 const jchar* ret; 2594 if (s_len > 0) { 2595 ret = s_value->char_at_addr(s_offset); 2596 } else { 2597 ret = (jchar*) s_value->base(T_CHAR); 2598 } 2599 DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret); 2600 return ret; 2601JNI_END 2602 2603 2604JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 2605 JNIWrapper("ReleaseStringCritical"); 2606 DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars); 2607 // The str and chars arguments are ignored 2608 GC_locker::unlock_critical(thread); 2609 DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return); 2610JNI_END 2611 2612 2613JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 2614 JNIWrapper("jni_NewWeakGlobalRef"); 2615 DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref); 2616 Handle ref_handle(thread, JNIHandles::resolve(ref)); 2617 jweak ret = JNIHandles::make_weak_global(ref_handle); 2618 DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret); 2619 return ret; 2620JNI_END 2621 2622// Must be JNI_ENTRY (with HandleMark) 2623JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 2624 JNIWrapper("jni_DeleteWeakGlobalRef"); 2625 DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref); 2626 JNIHandles::destroy_weak_global(ref); 2627 DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return); 2628JNI_END 2629 2630 2631JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 2632 JNIWrapper("jni_ExceptionCheck"); 2633 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env); 2634 jni_check_async_exceptions(thread); 2635 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 2636 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret); 2637 return ret; 2638JNI_END 2639 2640 2641// Initialization state for three routines below relating to 2642// java.nio.DirectBuffers 2643static jint directBufferSupportInitializeStarted = 0; 2644static volatile jint directBufferSupportInitializeEnded = 0; 2645static volatile jint directBufferSupportInitializeFailed = 0; 2646static jclass bufferClass = NULL; 2647static jclass directBufferClass = NULL; 2648static jclass directByteBufferClass = NULL; 2649static jmethodID directByteBufferConstructor = NULL; 2650static jfieldID directBufferAddressField = NULL; 2651static jfieldID bufferCapacityField = NULL; 2652 2653static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 2654 Handle loader; // null (bootstrap) loader 2655 Handle protection_domain; // null protection domain 2656 2657 symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL); 2658 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 2659 2660 if (TraceClassResolution && result != NULL) { 2661 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 2662 } 2663 return result; 2664} 2665 2666// These lookups are done with the NULL (bootstrap) ClassLoader to 2667// circumvent any security checks that would be done by jni_FindClass. 2668JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 2669{ 2670 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 2671 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 2672 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 2673 return true; 2674} 2675JNI_END 2676 2677 2678static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 2679 if (directBufferSupportInitializeFailed) { 2680 return false; 2681 } 2682 2683 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 2684 if (!lookupDirectBufferClasses(env)) { 2685 directBufferSupportInitializeFailed = 1; 2686 return false; 2687 } 2688 2689 // Make global references for these 2690 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 2691 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 2692 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 2693 2694 // Get needed field and method IDs 2695 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 2696 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 2697 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 2698 2699 if ((directByteBufferConstructor == NULL) || 2700 (directBufferAddressField == NULL) || 2701 (bufferCapacityField == NULL)) { 2702 directBufferSupportInitializeFailed = 1; 2703 return false; 2704 } 2705 2706 directBufferSupportInitializeEnded = 1; 2707 } else { 2708 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 2709 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls 2710 // os::sleep which requires the VM state transition. On other platforms, it 2711 // is not necessary. The following call to change the VM state is purposely 2712 // put inside the loop to avoid potential deadlock when multiple threads 2713 // try to call this method. See 6791815 for more details. 2714 ThreadInVMfromNative tivn(thread); 2715 os::yield_all(); 2716 } 2717 } 2718 2719 return !directBufferSupportInitializeFailed; 2720} 2721 2722extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 2723{ 2724 // thread_from_jni_environment() will block if VM is gone. 2725 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 2726 2727 JNIWrapper("jni_NewDirectByteBuffer"); 2728 DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity); 2729 2730 if (!directBufferSupportInitializeEnded) { 2731 if (!initializeDirectBufferSupport(env, thread)) { 2732 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL); 2733 return NULL; 2734 } 2735 } 2736 2737 // Being paranoid about accidental sign extension on address 2738 jlong addr = (jlong) ((uintptr_t) address); 2739 // NOTE that package-private DirectByteBuffer constructor currently 2740 // takes int capacity 2741 jint cap = (jint) capacity; 2742 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 2743 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret); 2744 return ret; 2745} 2746 2747DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*); 2748 2749extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 2750{ 2751 // thread_from_jni_environment() will block if VM is gone. 2752 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 2753 2754 JNIWrapper("jni_GetDirectBufferAddress"); 2755 DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf); 2756 void* ret = NULL; 2757 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 2758 2759 if (!directBufferSupportInitializeEnded) { 2760 if (!initializeDirectBufferSupport(env, thread)) { 2761 return 0; 2762 } 2763 } 2764 2765 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 2766 return 0; 2767 } 2768 2769 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 2770 return ret; 2771} 2772 2773DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong); 2774 2775extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 2776{ 2777 // thread_from_jni_environment() will block if VM is gone. 2778 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 2779 2780 JNIWrapper("jni_GetDirectBufferCapacity"); 2781 DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf); 2782 jlong ret = -1; 2783 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 2784 2785 if (!directBufferSupportInitializeEnded) { 2786 if (!initializeDirectBufferSupport(env, thread)) { 2787 ret = 0; 2788 return ret; 2789 } 2790 } 2791 2792 if (buf == NULL) { 2793 return -1; 2794 } 2795 2796 if (!env->IsInstanceOf(buf, directBufferClass)) { 2797 return -1; 2798 } 2799 2800 // NOTE that capacity is currently an int in the implementation 2801 ret = env->GetIntField(buf, bufferCapacityField); 2802 return ret; 2803} 2804 2805 2806JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 2807 JNIWrapper("GetVersion"); 2808 DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env); 2809 DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion); 2810 return CurrentVersion; 2811JNI_END 2812 2813extern struct JavaVM_ main_vm; 2814 2815JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 2816 JNIWrapper("jni_GetJavaVM"); 2817 DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm); 2818 *vm = (JavaVM *)(&main_vm); 2819 DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK); 2820 return JNI_OK; 2821JNI_END 2822 2823// Structure containing all jni functions 2824struct JNINativeInterface_ jni_NativeInterface = { 2825 NULL, 2826 NULL, 2827 NULL, 2828 2829 NULL, 2830 2831 jni_GetVersion, 2832 2833 jni_DefineClass, 2834 jni_FindClass, 2835 2836 jni_FromReflectedMethod, 2837 jni_FromReflectedField, 2838 2839 jni_ToReflectedMethod, 2840 2841 jni_GetSuperclass, 2842 jni_IsAssignableFrom, 2843 2844 jni_ToReflectedField, 2845 2846 jni_Throw, 2847 jni_ThrowNew, 2848 jni_ExceptionOccurred, 2849 jni_ExceptionDescribe, 2850 jni_ExceptionClear, 2851 jni_FatalError, 2852 2853 jni_PushLocalFrame, 2854 jni_PopLocalFrame, 2855 2856 jni_NewGlobalRef, 2857 jni_DeleteGlobalRef, 2858 jni_DeleteLocalRef, 2859 jni_IsSameObject, 2860 2861 jni_NewLocalRef, 2862 jni_EnsureLocalCapacity, 2863 2864 jni_AllocObject, 2865 jni_NewObject, 2866 jni_NewObjectV, 2867 jni_NewObjectA, 2868 2869 jni_GetObjectClass, 2870 jni_IsInstanceOf, 2871 2872 jni_GetMethodID, 2873 2874 jni_CallObjectMethod, 2875 jni_CallObjectMethodV, 2876 jni_CallObjectMethodA, 2877 jni_CallBooleanMethod, 2878 jni_CallBooleanMethodV, 2879 jni_CallBooleanMethodA, 2880 jni_CallByteMethod, 2881 jni_CallByteMethodV, 2882 jni_CallByteMethodA, 2883 jni_CallCharMethod, 2884 jni_CallCharMethodV, 2885 jni_CallCharMethodA, 2886 jni_CallShortMethod, 2887 jni_CallShortMethodV, 2888 jni_CallShortMethodA, 2889 jni_CallIntMethod, 2890 jni_CallIntMethodV, 2891 jni_CallIntMethodA, 2892 jni_CallLongMethod, 2893 jni_CallLongMethodV, 2894 jni_CallLongMethodA, 2895 jni_CallFloatMethod, 2896 jni_CallFloatMethodV, 2897 jni_CallFloatMethodA, 2898 jni_CallDoubleMethod, 2899 jni_CallDoubleMethodV, 2900 jni_CallDoubleMethodA, 2901 jni_CallVoidMethod, 2902 jni_CallVoidMethodV, 2903 jni_CallVoidMethodA, 2904 2905 jni_CallNonvirtualObjectMethod, 2906 jni_CallNonvirtualObjectMethodV, 2907 jni_CallNonvirtualObjectMethodA, 2908 jni_CallNonvirtualBooleanMethod, 2909 jni_CallNonvirtualBooleanMethodV, 2910 jni_CallNonvirtualBooleanMethodA, 2911 jni_CallNonvirtualByteMethod, 2912 jni_CallNonvirtualByteMethodV, 2913 jni_CallNonvirtualByteMethodA, 2914 jni_CallNonvirtualCharMethod, 2915 jni_CallNonvirtualCharMethodV, 2916 jni_CallNonvirtualCharMethodA, 2917 jni_CallNonvirtualShortMethod, 2918 jni_CallNonvirtualShortMethodV, 2919 jni_CallNonvirtualShortMethodA, 2920 jni_CallNonvirtualIntMethod, 2921 jni_CallNonvirtualIntMethodV, 2922 jni_CallNonvirtualIntMethodA, 2923 jni_CallNonvirtualLongMethod, 2924 jni_CallNonvirtualLongMethodV, 2925 jni_CallNonvirtualLongMethodA, 2926 jni_CallNonvirtualFloatMethod, 2927 jni_CallNonvirtualFloatMethodV, 2928 jni_CallNonvirtualFloatMethodA, 2929 jni_CallNonvirtualDoubleMethod, 2930 jni_CallNonvirtualDoubleMethodV, 2931 jni_CallNonvirtualDoubleMethodA, 2932 jni_CallNonvirtualVoidMethod, 2933 jni_CallNonvirtualVoidMethodV, 2934 jni_CallNonvirtualVoidMethodA, 2935 2936 jni_GetFieldID, 2937 2938 jni_GetObjectField, 2939 jni_GetBooleanField, 2940 jni_GetByteField, 2941 jni_GetCharField, 2942 jni_GetShortField, 2943 jni_GetIntField, 2944 jni_GetLongField, 2945 jni_GetFloatField, 2946 jni_GetDoubleField, 2947 2948 jni_SetObjectField, 2949 jni_SetBooleanField, 2950 jni_SetByteField, 2951 jni_SetCharField, 2952 jni_SetShortField, 2953 jni_SetIntField, 2954 jni_SetLongField, 2955 jni_SetFloatField, 2956 jni_SetDoubleField, 2957 2958 jni_GetStaticMethodID, 2959 2960 jni_CallStaticObjectMethod, 2961 jni_CallStaticObjectMethodV, 2962 jni_CallStaticObjectMethodA, 2963 jni_CallStaticBooleanMethod, 2964 jni_CallStaticBooleanMethodV, 2965 jni_CallStaticBooleanMethodA, 2966 jni_CallStaticByteMethod, 2967 jni_CallStaticByteMethodV, 2968 jni_CallStaticByteMethodA, 2969 jni_CallStaticCharMethod, 2970 jni_CallStaticCharMethodV, 2971 jni_CallStaticCharMethodA, 2972 jni_CallStaticShortMethod, 2973 jni_CallStaticShortMethodV, 2974 jni_CallStaticShortMethodA, 2975 jni_CallStaticIntMethod, 2976 jni_CallStaticIntMethodV, 2977 jni_CallStaticIntMethodA, 2978 jni_CallStaticLongMethod, 2979 jni_CallStaticLongMethodV, 2980 jni_CallStaticLongMethodA, 2981 jni_CallStaticFloatMethod, 2982 jni_CallStaticFloatMethodV, 2983 jni_CallStaticFloatMethodA, 2984 jni_CallStaticDoubleMethod, 2985 jni_CallStaticDoubleMethodV, 2986 jni_CallStaticDoubleMethodA, 2987 jni_CallStaticVoidMethod, 2988 jni_CallStaticVoidMethodV, 2989 jni_CallStaticVoidMethodA, 2990 2991 jni_GetStaticFieldID, 2992 2993 jni_GetStaticObjectField, 2994 jni_GetStaticBooleanField, 2995 jni_GetStaticByteField, 2996 jni_GetStaticCharField, 2997 jni_GetStaticShortField, 2998 jni_GetStaticIntField, 2999 jni_GetStaticLongField, 3000 jni_GetStaticFloatField, 3001 jni_GetStaticDoubleField, 3002 3003 jni_SetStaticObjectField, 3004 jni_SetStaticBooleanField, 3005 jni_SetStaticByteField, 3006 jni_SetStaticCharField, 3007 jni_SetStaticShortField, 3008 jni_SetStaticIntField, 3009 jni_SetStaticLongField, 3010 jni_SetStaticFloatField, 3011 jni_SetStaticDoubleField, 3012 3013 jni_NewString, 3014 jni_GetStringLength, 3015 jni_GetStringChars, 3016 jni_ReleaseStringChars, 3017 3018 jni_NewStringUTF, 3019 jni_GetStringUTFLength, 3020 jni_GetStringUTFChars, 3021 jni_ReleaseStringUTFChars, 3022 3023 jni_GetArrayLength, 3024 3025 jni_NewObjectArray, 3026 jni_GetObjectArrayElement, 3027 jni_SetObjectArrayElement, 3028 3029 jni_NewBooleanArray, 3030 jni_NewByteArray, 3031 jni_NewCharArray, 3032 jni_NewShortArray, 3033 jni_NewIntArray, 3034 jni_NewLongArray, 3035 jni_NewFloatArray, 3036 jni_NewDoubleArray, 3037 3038 jni_GetBooleanArrayElements, 3039 jni_GetByteArrayElements, 3040 jni_GetCharArrayElements, 3041 jni_GetShortArrayElements, 3042 jni_GetIntArrayElements, 3043 jni_GetLongArrayElements, 3044 jni_GetFloatArrayElements, 3045 jni_GetDoubleArrayElements, 3046 3047 jni_ReleaseBooleanArrayElements, 3048 jni_ReleaseByteArrayElements, 3049 jni_ReleaseCharArrayElements, 3050 jni_ReleaseShortArrayElements, 3051 jni_ReleaseIntArrayElements, 3052 jni_ReleaseLongArrayElements, 3053 jni_ReleaseFloatArrayElements, 3054 jni_ReleaseDoubleArrayElements, 3055 3056 jni_GetBooleanArrayRegion, 3057 jni_GetByteArrayRegion, 3058 jni_GetCharArrayRegion, 3059 jni_GetShortArrayRegion, 3060 jni_GetIntArrayRegion, 3061 jni_GetLongArrayRegion, 3062 jni_GetFloatArrayRegion, 3063 jni_GetDoubleArrayRegion, 3064 3065 jni_SetBooleanArrayRegion, 3066 jni_SetByteArrayRegion, 3067 jni_SetCharArrayRegion, 3068 jni_SetShortArrayRegion, 3069 jni_SetIntArrayRegion, 3070 jni_SetLongArrayRegion, 3071 jni_SetFloatArrayRegion, 3072 jni_SetDoubleArrayRegion, 3073 3074 jni_RegisterNatives, 3075 jni_UnregisterNatives, 3076 3077 jni_MonitorEnter, 3078 jni_MonitorExit, 3079 3080 jni_GetJavaVM, 3081 3082 jni_GetStringRegion, 3083 jni_GetStringUTFRegion, 3084 3085 jni_GetPrimitiveArrayCritical, 3086 jni_ReleasePrimitiveArrayCritical, 3087 3088 jni_GetStringCritical, 3089 jni_ReleaseStringCritical, 3090 3091 jni_NewWeakGlobalRef, 3092 jni_DeleteWeakGlobalRef, 3093 3094 jni_ExceptionCheck, 3095 3096 jni_NewDirectByteBuffer, 3097 jni_GetDirectBufferAddress, 3098 jni_GetDirectBufferCapacity, 3099 3100 // New 1_6 features 3101 3102 jni_GetObjectRefType 3103}; 3104 3105 3106// For jvmti use to modify jni function table. 3107// Java threads in native contiues to run until it is transitioned 3108// to VM at safepoint. Before the transition or before it is blocked 3109// for safepoint it may access jni function table. VM could crash if 3110// any java thread access the jni function table in the middle of memcpy. 3111// To avoid this each function pointers are copied automically. 3112void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3113 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3114 intptr_t *a = (intptr_t *) jni_functions(); 3115 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3116 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3117 Atomic::store_ptr(*b++, a++); 3118 } 3119} 3120 3121void quicken_jni_functions() { 3122 // Replace Get<Primitive>Field with fast versions 3123 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3124 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls 3125#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3126 // windows x86 currently needs SEH wrapper and the gain of the fast 3127 // versions currently isn't certain for server vm on uniprocessor. 3128 && os::is_MP() 3129#endif 3130 ) { 3131 address func; 3132 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3133 if (func != (address)-1) { 3134 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3135 } 3136 func = JNI_FastGetField::generate_fast_get_byte_field(); 3137 if (func != (address)-1) { 3138 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3139 } 3140 func = JNI_FastGetField::generate_fast_get_char_field(); 3141 if (func != (address)-1) { 3142 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3143 } 3144 func = JNI_FastGetField::generate_fast_get_short_field(); 3145 if (func != (address)-1) { 3146 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3147 } 3148 func = JNI_FastGetField::generate_fast_get_int_field(); 3149 if (func != (address)-1) { 3150 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3151 } 3152 func = JNI_FastGetField::generate_fast_get_long_field(); 3153 if (func != (address)-1) { 3154 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3155 } 3156 func = JNI_FastGetField::generate_fast_get_float_field(); 3157 if (func != (address)-1) { 3158 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3159 } 3160 func = JNI_FastGetField::generate_fast_get_double_field(); 3161 if (func != (address)-1) { 3162 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3163 } 3164 } 3165} 3166 3167// Returns the function structure 3168struct JNINativeInterface_* jni_functions() { 3169#ifndef JNICHECK_KERNEL 3170 if (CheckJNICalls) return jni_functions_check(); 3171#else // JNICHECK_KERNEL 3172 if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm."); 3173#endif // JNICHECK_KERNEL 3174 return &jni_NativeInterface; 3175} 3176 3177// Returns the function structure 3178struct JNINativeInterface_* jni_functions_nocheck() { 3179 return &jni_NativeInterface; 3180} 3181 3182 3183// Invocation API 3184 3185 3186// Forward declaration 3187extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3188 3189// Global invocation API vars 3190volatile jint vm_created = 0; 3191// Indicate whether it is safe to recreate VM 3192volatile jint safe_to_recreate_vm = 1; 3193struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3194 3195 3196#define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3197#define PROCSTACKSIZE 0 /* 0 means default size in HPI */ 3198enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3199 3200HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*); 3201DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint); 3202 3203_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3204 HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_); 3205 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3206 jint ret = JNI_ERR; 3207 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3208 3209 if (Threads::is_supported_jni_version(args->version)) { 3210 ret = JNI_OK; 3211 } 3212 // 1.1 style no longer supported in hotspot. 3213 // According the JNI spec, we should update args->version on return. 3214 // We also use the structure to communicate with launcher about default 3215 // stack size. 3216 if (args->version == JNI_VERSION_1_1) { 3217 args->version = JNI_VERSION_1_2; 3218 // javaStackSize is int in arguments structure 3219 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3220 args->javaStackSize = (jint)(ThreadStackSize * K); 3221 } 3222 return ret; 3223} 3224 3225HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); 3226DT_RETURN_MARK_DECL(CreateJavaVM, jint); 3227 3228_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3229 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); 3230 3231 jint result = JNI_ERR; 3232 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3233 3234 // We're about to use Atomic::xchg for synchronization. Some Zero 3235 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3236 // but __sync_lock_test_and_set is not guaranteed to do what we want 3237 // on all architectures. So we check it works before relying on it. 3238#if defined(ZERO) && defined(ASSERT) 3239 { 3240 jint a = 0xcafebabe; 3241 jint b = Atomic::xchg(0xdeadbeef, &a); 3242 void *c = &a; 3243 void *d = Atomic::xchg_ptr(&b, &c); 3244 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3245 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3246 } 3247#endif // ZERO && ASSERT 3248 3249 // At the moment it's only possible to have one Java VM, 3250 // since some of the runtime state is in global variables. 3251 3252 // We cannot use our mutex locks here, since they only work on 3253 // Threads. We do an atomic compare and exchange to ensure only 3254 // one thread can call this method at a time 3255 3256 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3257 // the add/dec implementations are dependent on whether we are running 3258 // on a multiprocessor, and at this stage of initialization the os::is_MP 3259 // function used to determine this will always return false. Atomic::xchg 3260 // does not have this problem. 3261 if (Atomic::xchg(1, &vm_created) == 1) { 3262 return JNI_ERR; // already created, or create attempt in progress 3263 } 3264 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3265 return JNI_ERR; // someone tried and failed and retry not allowed. 3266 } 3267 3268 assert(vm_created == 1, "vm_created is true during the creation"); 3269 3270 /** 3271 * Certain errors during initialization are recoverable and do not 3272 * prevent this method from being called again at a later time 3273 * (perhaps with different arguments). However, at a certain 3274 * point during initialization if an error occurs we cannot allow 3275 * this function to be called again (or it will crash). In those 3276 * situations, the 'canTryAgain' flag is set to false, which atomically 3277 * sets safe_to_recreate_vm to 1, such that any new call to 3278 * JNI_CreateJavaVM will immediately fail using the above logic. 3279 */ 3280 bool can_try_again = true; 3281 3282 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3283 if (result == JNI_OK) { 3284 JavaThread *thread = JavaThread::current(); 3285 /* thread is thread_in_vm here */ 3286 *vm = (JavaVM *)(&main_vm); 3287 *(JNIEnv**)penv = thread->jni_environment(); 3288 3289 // Tracks the time application was running before GC 3290 RuntimeService::record_application_start(); 3291 3292 // Notify JVMTI 3293 if (JvmtiExport::should_post_thread_life()) { 3294 JvmtiExport::post_thread_start(thread); 3295 } 3296 // Check if we should compile all classes on bootclasspath 3297 NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();) 3298 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 3299 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3300 } else { 3301 if (can_try_again) { 3302 // reset safe_to_recreate_vm to 1 so that retrial would be possible 3303 safe_to_recreate_vm = 1; 3304 } 3305 3306 // Creation failed. We must reset vm_created 3307 *vm = 0; 3308 *(JNIEnv**)penv = 0; 3309 // reset vm_created last to avoid race condition. Use OrderAccess to 3310 // control both compiler and architectural-based reordering. 3311 OrderAccess::release_store(&vm_created, 0); 3312 } 3313 3314 NOT_PRODUCT(test_error_handler(ErrorHandlerTest)); 3315 return result; 3316} 3317 3318HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \ 3319 JavaVM**, jsize, jsize*); 3320HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint); 3321 3322_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 3323 // See bug 4367188, the wrapper can sometimes cause VM crashes 3324 // JNIWrapper("GetCreatedJavaVMs"); 3325 HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \ 3326 vm_buf, bufLen, numVMs); 3327 if (vm_created) { 3328 if (numVMs != NULL) *numVMs = 1; 3329 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 3330 } else { 3331 if (numVMs != NULL) *numVMs = 0; 3332 } 3333 HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK); 3334 return JNI_OK; 3335} 3336 3337extern "C" { 3338 3339DT_RETURN_MARK_DECL(DestroyJavaVM, jint); 3340 3341jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 3342 DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm); 3343 jint res = JNI_ERR; 3344 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 3345 3346 if (!vm_created) { 3347 res = JNI_ERR; 3348 return res; 3349 } 3350 3351 JNIWrapper("DestroyJavaVM"); 3352 JNIEnv *env; 3353 JavaVMAttachArgs destroyargs; 3354 destroyargs.version = CurrentVersion; 3355 destroyargs.name = (char *)"DestroyJavaVM"; 3356 destroyargs.group = NULL; 3357 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 3358 if (res != JNI_OK) { 3359 return res; 3360 } 3361 3362 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 3363 JavaThread* thread = JavaThread::current(); 3364 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3365 if (Threads::destroy_vm()) { 3366 // Should not change thread state, VM is gone 3367 vm_created = false; 3368 res = JNI_OK; 3369 return res; 3370 } else { 3371 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3372 res = JNI_ERR; 3373 return res; 3374 } 3375} 3376 3377 3378static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 3379 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 3380 3381 // Check below commented out from JDK1.2fcs as well 3382 /* 3383 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 3384 return JNI_EVERSION; 3385 } 3386 */ 3387 3388 Thread* t = ThreadLocalStorage::get_thread_slow(); 3389 if (t != NULL) { 3390 // If the thread has been attached this operation is a no-op 3391 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 3392 return JNI_OK; 3393 } 3394 3395 // Create a thread and mark it as attaching so it will be skipped by the 3396 // ThreadsListEnumerator - see CR 6404306 3397 JavaThread* thread = new JavaThread(true); 3398 3399 // Set correct safepoint info. The thread is going to call into Java when 3400 // initializing the Java level thread object. Hence, the correct state must 3401 // be set in order for the Safepoint code to deal with it correctly. 3402 thread->set_thread_state(_thread_in_vm); 3403 // Must do this before initialize_thread_local_storage 3404 thread->record_stack_base_and_size(); 3405 3406 thread->initialize_thread_local_storage(); 3407 3408 if (!os::create_attached_thread(thread)) { 3409 delete thread; 3410 return JNI_ERR; 3411 } 3412 // Enable stack overflow checks 3413 thread->create_stack_guard_pages(); 3414 3415 thread->initialize_tlab(); 3416 3417 thread->cache_global_variables(); 3418 3419 // Crucial that we do not have a safepoint check for this thread, since it has 3420 // not been added to the Thread list yet. 3421 { Threads_lock->lock_without_safepoint_check(); 3422 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 3423 // avoid this thread trying to do a GC before it is added to the thread-list 3424 thread->set_active_handles(JNIHandleBlock::allocate_block()); 3425 Threads::add(thread, daemon); 3426 Threads_lock->unlock(); 3427 } 3428 // Create thread group and name info from attach arguments 3429 oop group = NULL; 3430 char* thread_name = NULL; 3431 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 3432 group = JNIHandles::resolve(args->group); 3433 thread_name = args->name; // may be NULL 3434 } 3435 if (group == NULL) group = Universe::main_thread_group(); 3436 3437 // Create Java level thread object and attach it to this thread 3438 bool attach_failed = false; 3439 { 3440 EXCEPTION_MARK; 3441 HandleMark hm(THREAD); 3442 Handle thread_group(THREAD, group); 3443 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 3444 if (HAS_PENDING_EXCEPTION) { 3445 CLEAR_PENDING_EXCEPTION; 3446 // cleanup outside the handle mark. 3447 attach_failed = true; 3448 } 3449 } 3450 3451 if (attach_failed) { 3452 // Added missing cleanup 3453 thread->cleanup_failed_attach_current_thread(); 3454 return JNI_ERR; 3455 } 3456 3457 // mark the thread as no longer attaching 3458 // this uses a fence to push the change through so we don't have 3459 // to regrab the threads_lock 3460 thread->set_attached(); 3461 3462 // Set java thread status. 3463 java_lang_Thread::set_thread_status(thread->threadObj(), 3464 java_lang_Thread::RUNNABLE); 3465 3466 // Notify the debugger 3467 if (JvmtiExport::should_post_thread_life()) { 3468 JvmtiExport::post_thread_start(thread); 3469 } 3470 3471 *(JNIEnv**)penv = thread->jni_environment(); 3472 3473 // Now leaving the VM, so change thread_state. This is normally automatically taken care 3474 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 3475 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 3476 // needed. 3477 3478 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 3479 3480 // Perform any platform dependent FPU setup 3481 os::setup_fpu(); 3482 3483 return JNI_OK; 3484} 3485 3486 3487jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 3488 DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args); 3489 if (!vm_created) { 3490 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR); 3491 return JNI_ERR; 3492 } 3493 3494 JNIWrapper("AttachCurrentThread"); 3495 jint ret = attach_current_thread(vm, penv, _args, false); 3496 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret); 3497 return ret; 3498} 3499 3500 3501jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 3502 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm); 3503 VM_Exit::block_if_vm_exited(); 3504 3505 JNIWrapper("DetachCurrentThread"); 3506 3507 // If the thread has been deattacted the operations is a no-op 3508 if (ThreadLocalStorage::thread() == NULL) { 3509 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); 3510 return JNI_OK; 3511 } 3512 3513 JavaThread* thread = JavaThread::current(); 3514 if (thread->has_last_Java_frame()) { 3515 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR); 3516 // Can't detach a thread that's running java, that can't work. 3517 return JNI_ERR; 3518 } 3519 3520 // Safepoint support. Have to do call-back to safepoint code, if in the 3521 // middel of a safepoint operation 3522 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 3523 3524 // XXX: Note that JavaThread::exit() call below removes the guards on the 3525 // stack pages set up via enable_stack_{red,yellow}_zone() calls 3526 // above in jni_AttachCurrentThread. Unfortunately, while the setting 3527 // of the guards is visible in jni_AttachCurrentThread above, 3528 // the removal of the guards is buried below in JavaThread::exit() 3529 // here. The abstraction should be more symmetrically either exposed 3530 // or hidden (e.g. it could probably be hidden in the same 3531 // (platform-dependent) methods where we do alternate stack 3532 // maintenance work?) 3533 thread->exit(false, JavaThread::jni_detach); 3534 delete thread; 3535 3536 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); 3537 return JNI_OK; 3538} 3539 3540DT_RETURN_MARK_DECL(GetEnv, jint); 3541 3542jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 3543 DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version); 3544 jint ret = JNI_ERR; 3545 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 3546 3547 if (!vm_created) { 3548 *penv = NULL; 3549 ret = JNI_EDETACHED; 3550 return ret; 3551 } 3552 3553 if (JvmtiExport::is_jvmti_version(version)) { 3554 ret = JvmtiExport::get_jvmti_interface(vm, penv, version); 3555 return ret; 3556 } 3557 3558#ifndef JVMPI_VERSION_1 3559// need these in order to be polite about older agents 3560#define JVMPI_VERSION_1 ((jint)0x10000001) 3561#define JVMPI_VERSION_1_1 ((jint)0x10000002) 3562#define JVMPI_VERSION_1_2 ((jint)0x10000003) 3563#endif // !JVMPI_VERSION_1 3564 3565 Thread* thread = ThreadLocalStorage::thread(); 3566 if (thread != NULL && thread->is_Java_thread()) { 3567 if (Threads::is_supported_jni_version_including_1_1(version)) { 3568 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 3569 ret = JNI_OK; 3570 return ret; 3571 3572 } else if (version == JVMPI_VERSION_1 || 3573 version == JVMPI_VERSION_1_1 || 3574 version == JVMPI_VERSION_1_2) { 3575 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 3576 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 3577 ret = JNI_EVERSION; 3578 return ret; 3579 } else if (JvmtiExport::is_jvmdi_version(version)) { 3580 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 3581 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 3582 ret = JNI_EVERSION; 3583 return ret; 3584 } else { 3585 *penv = NULL; 3586 ret = JNI_EVERSION; 3587 return ret; 3588 } 3589 } else { 3590 *penv = NULL; 3591 ret = JNI_EDETACHED; 3592 return ret; 3593 } 3594} 3595 3596 3597jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 3598 DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args); 3599 if (!vm_created) { 3600 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR); 3601 return JNI_ERR; 3602 } 3603 3604 JNIWrapper("AttachCurrentThreadAsDaemon"); 3605 jint ret = attach_current_thread(vm, penv, _args, true); 3606 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret); 3607 return ret; 3608} 3609 3610 3611} // End extern "C" 3612 3613const struct JNIInvokeInterface_ jni_InvokeInterface = { 3614 NULL, 3615 NULL, 3616 NULL, 3617 3618 jni_DestroyJavaVM, 3619 jni_AttachCurrentThread, 3620 jni_DetachCurrentThread, 3621 jni_GetEnv, 3622 jni_AttachCurrentThreadAsDaemon 3623}; 3624