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