jni.cpp revision 6218:be5c9920f0e1
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#include "precompiled.hpp" 27#include "ci/ciReplay.hpp" 28#include "classfile/altHashing.hpp" 29#include "classfile/classLoader.hpp" 30#include "classfile/javaClasses.hpp" 31#include "classfile/symbolTable.hpp" 32#include "classfile/systemDictionary.hpp" 33#include "classfile/vmSymbols.hpp" 34#include "interpreter/linkResolver.hpp" 35#include "utilities/macros.hpp" 36#if INCLUDE_ALL_GCS 37#include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" 38#endif // INCLUDE_ALL_GCS 39#include "memory/allocation.hpp" 40#include "memory/allocation.inline.hpp" 41#include "memory/gcLocker.inline.hpp" 42#include "memory/oopFactory.hpp" 43#include "memory/universe.inline.hpp" 44#include "oops/instanceKlass.hpp" 45#include "oops/instanceOop.hpp" 46#include "oops/markOop.hpp" 47#include "oops/method.hpp" 48#include "oops/objArrayKlass.hpp" 49#include "oops/objArrayOop.hpp" 50#include "oops/oop.inline.hpp" 51#include "oops/symbol.hpp" 52#include "oops/typeArrayKlass.hpp" 53#include "oops/typeArrayOop.hpp" 54#include "prims/jni.h" 55#include "prims/jniCheck.hpp" 56#include "prims/jniExport.hpp" 57#include "prims/jniFastGetField.hpp" 58#include "prims/jvm.h" 59#include "prims/jvm_misc.hpp" 60#include "prims/jvmtiExport.hpp" 61#include "prims/jvmtiThreadState.hpp" 62#include "runtime/compilationPolicy.hpp" 63#include "runtime/fieldDescriptor.hpp" 64#include "runtime/fprofiler.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/reflection.hpp" 71#include "runtime/sharedRuntime.hpp" 72#include "runtime/signature.hpp" 73#include "runtime/thread.inline.hpp" 74#include "runtime/vm_operations.hpp" 75#include "services/runtimeService.hpp" 76#include "trace/tracing.hpp" 77#include "utilities/defaultStream.hpp" 78#include "utilities/dtrace.hpp" 79#include "utilities/events.hpp" 80#include "utilities/histogram.hpp" 81#ifdef TARGET_OS_FAMILY_linux 82# include "os_linux.inline.hpp" 83#endif 84#ifdef TARGET_OS_FAMILY_solaris 85# include "os_solaris.inline.hpp" 86#endif 87#ifdef TARGET_OS_FAMILY_windows 88# include "os_windows.inline.hpp" 89#endif 90#ifdef TARGET_OS_FAMILY_bsd 91# include "os_bsd.inline.hpp" 92#endif 93 94static jint CurrentVersion = JNI_VERSION_1_8; 95 96 97// The DT_RETURN_MARK macros create a scoped object to fire the dtrace 98// '-return' probe regardless of the return path is taken out of the function. 99// Methods that have multiple return paths use this to avoid having to 100// instrument each return path. Methods that use CHECK or THROW must use this 101// since those macros can cause an immedate uninstrumented return. 102// 103// In order to get the return value, a reference to the variable containing 104// the return value must be passed to the contructor of the object, and 105// the return value must be set before return (since the mark object has 106// a reference to it). 107// 108// Example: 109// DT_RETURN_MARK_DECL(SomeFunc, int); 110// JNI_ENTRY(int, SomeFunc, ...) 111// int return_value = 0; 112// DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 113// foo(CHECK_0) 114// return_value = 5; 115// return return_value; 116// JNI_END 117#define DT_RETURN_MARK_DECL(name, type, probe) \ 118 DTRACE_ONLY( \ 119 class DTraceReturnProbeMark_##name { \ 120 public: \ 121 const type& _ret_ref; \ 122 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 123 ~DTraceReturnProbeMark_##name() { \ 124 probe; \ 125 } \ 126 } \ 127 ) 128// Void functions are simpler since there's no return value 129#define DT_VOID_RETURN_MARK_DECL(name, probe) \ 130 DTRACE_ONLY( \ 131 class DTraceReturnProbeMark_##name { \ 132 public: \ 133 ~DTraceReturnProbeMark_##name() { \ 134 probe; \ 135 } \ 136 } \ 137 ) 138 139// Place these macros in the function to mark the return. Non-void 140// functions need the type and address of the return value. 141#define DT_RETURN_MARK(name, type, ref) \ 142 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 143#define DT_VOID_RETURN_MARK(name) \ 144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 145 146 147// Use these to select distinct code for floating-point vs. non-floating point 148// situations. Used from within common macros where we need slightly 149// different behavior for Float/Double 150#define FP_SELECT_Boolean(intcode, fpcode) intcode 151#define FP_SELECT_Byte(intcode, fpcode) intcode 152#define FP_SELECT_Char(intcode, fpcode) intcode 153#define FP_SELECT_Short(intcode, fpcode) intcode 154#define FP_SELECT_Object(intcode, fpcode) intcode 155#define FP_SELECT_Int(intcode, fpcode) intcode 156#define FP_SELECT_Long(intcode, fpcode) intcode 157#define FP_SELECT_Float(intcode, fpcode) fpcode 158#define FP_SELECT_Double(intcode, fpcode) fpcode 159#define FP_SELECT(TypeName, intcode, fpcode) \ 160 FP_SELECT_##TypeName(intcode, fpcode) 161 162#define COMMA , 163 164// Choose DT_RETURN_MARK macros based on the type: float/double -> void 165// (dtrace doesn't do FP yet) 166#define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 167 FP_SELECT(TypeName, \ 168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 169#define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 170 FP_SELECT(TypeName, \ 171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 172 173 174// out-of-line helpers for class jfieldIDWorkaround: 175 176bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 178 uintptr_t as_uint = (uintptr_t) id; 179 intptr_t offset = raw_instance_offset(id); 180 if (is_checked_jfieldID(id)) { 181 if (!klass_hash_ok(k, id)) { 182 return false; 183 } 184 } 185 return InstanceKlass::cast(k)->contains_field_offset(offset); 186 } else { 187 JNIid* result = (JNIid*) id; 188#ifdef ASSERT 189 return result != NULL && result->is_static_field_id(); 190#else 191 return result != NULL; 192#endif 193 } 194} 195 196 197intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 198 if (offset <= small_offset_mask) { 199 Klass* field_klass = k; 200 Klass* super_klass = field_klass->super(); 201 // With compressed oops the most super class with nonstatic fields would 202 // be the owner of fields embedded in the header. 203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 205 field_klass = super_klass; // super contains the field also 206 super_klass = field_klass->super(); 207 } 208 debug_only(No_Safepoint_Verifier nosafepoint;) 209 uintptr_t klass_hash = field_klass->identity_hash(); 210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 211 } else { 212#if 0 213 #ifndef PRODUCT 214 { 215 ResourceMark rm; 216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 217 } 218 #endif 219#endif 220 return 0; 221 } 222} 223 224bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 225 uintptr_t as_uint = (uintptr_t) id; 226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 227 do { 228 debug_only(No_Safepoint_Verifier nosafepoint;) 229 // Could use a non-blocking query for identity_hash here... 230 if ((k->identity_hash() & klass_mask) == klass_hash) 231 return true; 232 k = k->super(); 233 } while (k != NULL); 234 return false; 235} 236 237void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 239 uintptr_t as_uint = (uintptr_t) id; 240 intptr_t offset = raw_instance_offset(id); 241 if (VerifyJNIFields) { 242 if (is_checked_jfieldID(id)) { 243 guarantee(klass_hash_ok(k, id), 244 "Bug in native code: jfieldID class must match object"); 245 } else { 246#if 0 247 #ifndef PRODUCT 248 if (Verbose) { 249 ResourceMark rm; 250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 251 } 252 #endif 253#endif 254 } 255 } 256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 257 "Bug in native code: jfieldID offset must address interior of object"); 258} 259 260// Pick a reasonable higher bound for local capacity requested 261// for EnsureLocalCapacity and PushLocalFrame. We don't want it too 262// high because a test (or very unusual application) may try to allocate 263// that many handles and run out of swap space. An implementation is 264// permitted to allocate more handles than the ensured capacity, so this 265// value is set high enough to prevent compatibility problems. 266const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; 267 268 269// Wrapper to trace JNI functions 270 271#ifdef ASSERT 272 Histogram* JNIHistogram; 273 static volatile jint JNIHistogram_lock = 0; 274 275 class JNITraceWrapper : public StackObj { 276 public: 277 JNITraceWrapper(const char* format, ...) { 278 if (TraceJNICalls) { 279 va_list ap; 280 va_start(ap, format); 281 tty->print("JNI "); 282 tty->vprint_cr(format, ap); 283 va_end(ap); 284 } 285 } 286 }; 287 288 class JNIHistogramElement : public HistogramElement { 289 public: 290 JNIHistogramElement(const char* name); 291 }; 292 293 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 294 _name = elementName; 295 uintx count = 0; 296 297 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 298 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 299 count +=1; 300 if ( (WarnOnStalledSpinLock > 0) 301 && (count % WarnOnStalledSpinLock == 0)) { 302 warning("JNIHistogram_lock seems to be stalled"); 303 } 304 } 305 } 306 307 308 if(JNIHistogram == NULL) 309 JNIHistogram = new Histogram("JNI Call Counts",100); 310 311 JNIHistogram->add_element(this); 312 Atomic::dec(&JNIHistogram_lock); 313 } 314 315 #define JNICountWrapper(arg) \ 316 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 317 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 318 if (e != NULL) e->increment_count() 319 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) 320#else 321 #define JNIWrapper(arg) 322#endif 323 324 325// Implementation of JNI entries 326 327DT_RETURN_MARK_DECL(DefineClass, jclass 328 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 329 330JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 331 const jbyte *buf, jsize bufLen)) 332 JNIWrapper("DefineClass"); 333 334 HOTSPOT_JNI_DEFINECLASS_ENTRY( 335 env, (char*) name, loaderRef, (char*) buf, bufLen); 336 337 jclass cls = NULL; 338 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 339 340 TempNewSymbol class_name = NULL; 341 // Since exceptions can be thrown, class initialization can take place 342 // if name is NULL no check for class name in .class stream has to be made. 343 if (name != NULL) { 344 const int str_len = (int)strlen(name); 345 if (str_len > Symbol::max_length()) { 346 // It's impossible to create this class; the name cannot fit 347 // into the constant pool. 348 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 349 } 350 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 351 } 352 ResourceMark rm(THREAD); 353 ClassFileStream st((u1*) buf, bufLen, NULL); 354 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 355 356 if (UsePerfData && !class_loader.is_null()) { 357 // check whether the current caller thread holds the lock or not. 358 // If not, increment the corresponding counter 359 if (ObjectSynchronizer:: 360 query_lock_ownership((JavaThread*)THREAD, class_loader) != 361 ObjectSynchronizer::owner_self) { 362 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 363 } 364 } 365 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 366 Handle(), &st, true, 367 CHECK_NULL); 368 369 if (TraceClassResolution && k != NULL) { 370 trace_class_resolution(k); 371 } 372 373 cls = (jclass)JNIHandles::make_local( 374 env, k->java_mirror()); 375 return cls; 376JNI_END 377 378 379 380static bool first_time_FindClass = true; 381 382DT_RETURN_MARK_DECL(FindClass, jclass 383 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 384 385JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 386 JNIWrapper("FindClass"); 387 388 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 389 390 jclass result = NULL; 391 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 392 393 // Remember if we are the first invocation of jni_FindClass 394 bool first_time = first_time_FindClass; 395 first_time_FindClass = false; 396 397 // Sanity check the name: it cannot be null or larger than the maximum size 398 // name we can fit in the constant pool. 399 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 400 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 401 } 402 403 //%note jni_3 404 Handle loader; 405 Handle protection_domain; 406 // Find calling class 407 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 408 if (k.not_null()) { 409 loader = Handle(THREAD, k->class_loader()); 410 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 411 // in the correct class context. 412 if (loader.is_null() && 413 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 414 JavaValue result(T_OBJECT); 415 JavaCalls::call_static(&result, k, 416 vmSymbols::getFromClass_name(), 417 vmSymbols::void_class_signature(), 418 thread); 419 if (HAS_PENDING_EXCEPTION) { 420 Handle ex(thread, thread->pending_exception()); 421 CLEAR_PENDING_EXCEPTION; 422 THROW_HANDLE_0(ex); 423 } 424 oop mirror = (oop) result.get_jobject(); 425 loader = Handle(THREAD, 426 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 427 protection_domain = Handle(THREAD, 428 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 429 } 430 } else { 431 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 432 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 433 } 434 435 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 436 result = find_class_from_class_loader(env, sym, true, loader, 437 protection_domain, true, thread); 438 439 if (TraceClassResolution && result != NULL) { 440 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 441 } 442 443 // If we were the first invocation of jni_FindClass, we enable compilation again 444 // rather than just allowing invocation counter to overflow and decay. 445 // Controlled by flag DelayCompilationDuringStartup. 446 if (first_time && !CompileTheWorld) 447 CompilationPolicy::completed_vm_startup(); 448 449 return result; 450JNI_END 451 452DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 453 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 454 455JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 456 JNIWrapper("FromReflectedMethod"); 457 458 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 459 460 jmethodID ret = NULL; 461 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 462 463 // method is a handle to a java.lang.reflect.Method object 464 oop reflected = JNIHandles::resolve_non_null(method); 465 oop mirror = NULL; 466 int slot = 0; 467 468 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 469 mirror = java_lang_reflect_Constructor::clazz(reflected); 470 slot = java_lang_reflect_Constructor::slot(reflected); 471 } else { 472 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 473 mirror = java_lang_reflect_Method::clazz(reflected); 474 slot = java_lang_reflect_Method::slot(reflected); 475 } 476 Klass* k = java_lang_Class::as_Klass(mirror); 477 478 KlassHandle k1(THREAD, k); 479 // Make sure class is initialized before handing id's out to methods 480 k1()->initialize(CHECK_NULL); 481 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 482 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 483 return ret; 484JNI_END 485 486DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 487 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 488 489JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 490 JNIWrapper("FromReflectedField"); 491 492 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 493 494 jfieldID ret = NULL; 495 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 496 497 // field is a handle to a java.lang.reflect.Field object 498 oop reflected = JNIHandles::resolve_non_null(field); 499 oop mirror = java_lang_reflect_Field::clazz(reflected); 500 Klass* k = java_lang_Class::as_Klass(mirror); 501 int slot = java_lang_reflect_Field::slot(reflected); 502 int modifiers = java_lang_reflect_Field::modifiers(reflected); 503 504 KlassHandle k1(THREAD, k); 505 // Make sure class is initialized before handing id's out to fields 506 k1()->initialize(CHECK_NULL); 507 508 // First check if this is a static field 509 if (modifiers & JVM_ACC_STATIC) { 510 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 511 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 512 assert(id != NULL, "corrupt Field object"); 513 debug_only(id->set_is_static_field_id();) 514 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 515 ret = jfieldIDWorkaround::to_static_jfieldID(id); 516 return ret; 517 } 518 519 // The slot is the index of the field description in the field-array 520 // The jfieldID is the offset of the field within the object 521 // It may also have hash bits for k, if VerifyJNIFields is turned on. 522 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 523 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 524 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 525 return ret; 526JNI_END 527 528 529DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 530 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 531 532JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 533 JNIWrapper("ToReflectedMethod"); 534 535 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 536 537 jobject ret = NULL; 538 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 539 540 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 541 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 542 oop reflection_method; 543 if (m->is_initializer()) { 544 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 545 } else { 546 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); 547 } 548 ret = JNIHandles::make_local(env, reflection_method); 549 return ret; 550JNI_END 551 552DT_RETURN_MARK_DECL(GetSuperclass, jclass 553 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 554 555JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 556 JNIWrapper("GetSuperclass"); 557 558 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 559 560 jclass obj = NULL; 561 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 562 563 oop mirror = JNIHandles::resolve_non_null(sub); 564 // primitive classes return NULL 565 if (java_lang_Class::is_primitive(mirror)) return NULL; 566 567 // Rules of Class.getSuperClass as implemented by KLass::java_super: 568 // arrays return Object 569 // interfaces return NULL 570 // proper classes return Klass::super() 571 Klass* k = java_lang_Class::as_Klass(mirror); 572 if (k->is_interface()) return NULL; 573 574 // return mirror for superclass 575 Klass* super = k->java_super(); 576 // super2 is the value computed by the compiler's getSuperClass intrinsic: 577 debug_only(Klass* super2 = ( k->oop_is_array() 578 ? SystemDictionary::Object_klass() 579 : k->super() ) ); 580 assert(super == super2, 581 "java_super computation depends on interface, array, other super"); 582 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 583 return obj; 584JNI_END 585 586JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 587 JNIWrapper("IsSubclassOf"); 588 589 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 590 591 oop sub_mirror = JNIHandles::resolve_non_null(sub); 592 oop super_mirror = JNIHandles::resolve_non_null(super); 593 if (java_lang_Class::is_primitive(sub_mirror) || 594 java_lang_Class::is_primitive(super_mirror)) { 595 jboolean ret = (sub_mirror == super_mirror); 596 597 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 598 return ret; 599 } 600 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 601 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 602 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 603 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 604 JNI_TRUE : JNI_FALSE; 605 606 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 607 return ret; 608JNI_END 609 610 611DT_RETURN_MARK_DECL(Throw, jint 612 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 613 614JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 615 JNIWrapper("Throw"); 616 617 HOTSPOT_JNI_THROW_ENTRY(env, obj); 618 619 jint ret = JNI_OK; 620 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 621 622 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 623 ShouldNotReachHere(); 624JNI_END 625 626 627DT_RETURN_MARK_DECL(ThrowNew, jint 628 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 629 630JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 631 JNIWrapper("ThrowNew"); 632 633 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 634 635 jint ret = JNI_OK; 636 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 637 638 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 639 Symbol* name = k->name(); 640 Handle class_loader (THREAD, k->class_loader()); 641 Handle protection_domain (THREAD, k->protection_domain()); 642 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 643 ShouldNotReachHere(); 644JNI_END 645 646 647// JNI functions only transform a pending async exception to a synchronous 648// exception in ExceptionOccurred and ExceptionCheck calls, since 649// delivering an async exception in other places won't change the native 650// code's control flow and would be harmful when native code further calls 651// JNI functions with a pending exception. Async exception is also checked 652// during the call, so ExceptionOccurred/ExceptionCheck won't return 653// false but deliver the async exception at the very end during 654// state transition. 655 656static void jni_check_async_exceptions(JavaThread *thread) { 657 assert(thread == Thread::current(), "must be itself"); 658 thread->check_and_handle_async_exceptions(); 659} 660 661JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 662 JNIWrapper("ExceptionOccurred"); 663 664 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 665 666 jni_check_async_exceptions(thread); 667 oop exception = thread->pending_exception(); 668 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 669 670 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 671 return ret; 672JNI_END 673 674 675JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 676 JNIWrapper("ExceptionDescribe"); 677 678 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 679 680 if (thread->has_pending_exception()) { 681 Handle ex(thread, thread->pending_exception()); 682 thread->clear_pending_exception(); 683 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 684 // Don't print anything if we are being killed. 685 } else { 686 jio_fprintf(defaultStream::error_stream(), "Exception "); 687 if (thread != NULL && thread->threadObj() != NULL) { 688 ResourceMark rm(THREAD); 689 jio_fprintf(defaultStream::error_stream(), 690 "in thread \"%s\" ", thread->get_thread_name()); 691 } 692 if (ex->is_a(SystemDictionary::Throwable_klass())) { 693 JavaValue result(T_VOID); 694 JavaCalls::call_virtual(&result, 695 ex, 696 KlassHandle(THREAD, 697 SystemDictionary::Throwable_klass()), 698 vmSymbols::printStackTrace_name(), 699 vmSymbols::void_method_signature(), 700 THREAD); 701 // If an exception is thrown in the call it gets thrown away. Not much 702 // we can do with it. The native code that calls this, does not check 703 // for the exception - hence, it might still be in the thread when DestroyVM gets 704 // called, potentially causing a few asserts to trigger - since no pending exception 705 // is expected. 706 CLEAR_PENDING_EXCEPTION; 707 } else { 708 ResourceMark rm(THREAD); 709 jio_fprintf(defaultStream::error_stream(), 710 ". Uncaught exception of type %s.", 711 ex->klass()->external_name()); 712 } 713 } 714 } 715 716 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 717JNI_END 718 719 720JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 721 JNIWrapper("ExceptionClear"); 722 723 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 724 725 // The jni code might be using this API to clear java thrown exception. 726 // So just mark jvmti thread exception state as exception caught. 727 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 728 if (state != NULL && state->is_exception_detected()) { 729 state->set_exception_caught(); 730 } 731 thread->clear_pending_exception(); 732 733 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 734JNI_END 735 736 737JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 738 JNIWrapper("FatalError"); 739 740 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 741 742 tty->print_cr("FATAL ERROR in native method: %s", msg); 743 thread->print_stack(); 744 os::abort(); // Dump core and abort 745JNI_END 746 747 748JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 749 JNIWrapper("PushLocalFrame"); 750 751 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 752 753 //%note jni_11 754 if (capacity < 0 || capacity > MAX_REASONABLE_LOCAL_CAPACITY) { 755 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 756 return JNI_ERR; 757 } 758 JNIHandleBlock* old_handles = thread->active_handles(); 759 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 760 assert(new_handles != NULL, "should not be NULL"); 761 new_handles->set_pop_frame_link(old_handles); 762 thread->set_active_handles(new_handles); 763 jint ret = JNI_OK; 764 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 765 return ret; 766JNI_END 767 768 769JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 770 JNIWrapper("PopLocalFrame"); 771 772 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 773 774 //%note jni_11 775 Handle result_handle(thread, JNIHandles::resolve(result)); 776 JNIHandleBlock* old_handles = thread->active_handles(); 777 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 778 if (new_handles != NULL) { 779 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 780 // This way code will still work if PopLocalFrame is called without a corresponding 781 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 782 // the release_block call will release the blocks. 783 thread->set_active_handles(new_handles); 784 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 785 JNIHandleBlock::release_block(old_handles, thread); // may block 786 result = JNIHandles::make_local(thread, result_handle()); 787 } 788 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 789 return result; 790JNI_END 791 792 793JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 794 JNIWrapper("NewGlobalRef"); 795 796 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 797 798 Handle ref_handle(thread, JNIHandles::resolve(ref)); 799 jobject ret = JNIHandles::make_global(ref_handle); 800 801 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 802 return ret; 803JNI_END 804 805// Must be JNI_ENTRY (with HandleMark) 806JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 807 JNIWrapper("DeleteGlobalRef"); 808 809 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 810 811 JNIHandles::destroy_global(ref); 812 813 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 814JNI_END 815 816JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 817 JNIWrapper("DeleteLocalRef"); 818 819 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 820 821 JNIHandles::destroy_local(obj); 822 823 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 824JNI_END 825 826JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 827 JNIWrapper("IsSameObject"); 828 829 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 830 831 oop a = JNIHandles::resolve(r1); 832 oop b = JNIHandles::resolve(r2); 833 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 834 835 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 836 return ret; 837JNI_END 838 839 840JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 841 JNIWrapper("NewLocalRef"); 842 843 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 844 845 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 846 847 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 848 return ret; 849JNI_END 850 851JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 852 JNIWrapper("EnsureLocalCapacity"); 853 854 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 855 856 jint ret; 857 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { 858 ret = JNI_OK; 859 } else { 860 ret = JNI_ERR; 861 } 862 863 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 864 return ret; 865JNI_END 866 867// Return the Handle Type 868JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 869 JNIWrapper("GetObjectRefType"); 870 871 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 872 873 jobjectRefType ret; 874 if (JNIHandles::is_local_handle(thread, obj) || 875 JNIHandles::is_frame_handle(thread, obj)) 876 ret = JNILocalRefType; 877 else if (JNIHandles::is_global_handle(obj)) 878 ret = JNIGlobalRefType; 879 else if (JNIHandles::is_weak_global_handle(obj)) 880 ret = JNIWeakGlobalRefType; 881 else 882 ret = JNIInvalidRefType; 883 884 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 885 return ret; 886JNI_END 887 888 889class JNI_ArgumentPusher : public SignatureIterator { 890 protected: 891 JavaCallArguments* _arguments; 892 893 virtual void get_bool () = 0; 894 virtual void get_char () = 0; 895 virtual void get_short () = 0; 896 virtual void get_byte () = 0; 897 virtual void get_int () = 0; 898 virtual void get_long () = 0; 899 virtual void get_float () = 0; 900 virtual void get_double () = 0; 901 virtual void get_object () = 0; 902 903 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 904 this->_return_type = T_ILLEGAL; 905 _arguments = NULL; 906 } 907 908 public: 909 virtual void iterate( uint64_t fingerprint ) = 0; 910 911 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 912 913 inline void do_bool() { if (!is_return_type()) get_bool(); } 914 inline void do_char() { if (!is_return_type()) get_char(); } 915 inline void do_short() { if (!is_return_type()) get_short(); } 916 inline void do_byte() { if (!is_return_type()) get_byte(); } 917 inline void do_int() { if (!is_return_type()) get_int(); } 918 inline void do_long() { if (!is_return_type()) get_long(); } 919 inline void do_float() { if (!is_return_type()) get_float(); } 920 inline void do_double() { if (!is_return_type()) get_double(); } 921 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 922 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 923 inline void do_void() { } 924 925 JavaCallArguments* arguments() { return _arguments; } 926 void push_receiver(Handle h) { _arguments->push_oop(h); } 927}; 928 929 930class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 931 protected: 932 va_list _ap; 933 934 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 935 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 936 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 937 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 938 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 939 940 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 941 942 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 943 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 944 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 945 inline void get_object() { jobject l = va_arg(_ap, jobject); 946 _arguments->push_oop(Handle((oop *)l, false)); } 947 948 inline void set_ap(va_list rap) { 949#ifdef va_copy 950 va_copy(_ap, rap); 951#elif defined (__va_copy) 952 __va_copy(_ap, rap); 953#else 954 _ap = rap; 955#endif 956 } 957 958 public: 959 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 960 : JNI_ArgumentPusher(signature) { 961 set_ap(rap); 962 } 963 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 964 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 965 set_ap(rap); 966 } 967 968 // Optimized path if we have the bitvector form of signature 969 void iterate( uint64_t fingerprint ) { 970 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments 971 else { 972 _return_type = (BasicType)((fingerprint >> static_feature_size) & 973 result_feature_mask); 974 975 assert(fingerprint, "Fingerprint should not be 0"); 976 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 977 while ( 1 ) { 978 switch ( fingerprint & parameter_feature_mask ) { 979 case bool_parm: 980 case char_parm: 981 case short_parm: 982 case byte_parm: 983 case int_parm: 984 get_int(); 985 break; 986 case obj_parm: 987 get_object(); 988 break; 989 case long_parm: 990 get_long(); 991 break; 992 case float_parm: 993 get_float(); 994 break; 995 case double_parm: 996 get_double(); 997 break; 998 case done_parm: 999 return; 1000 break; 1001 default: 1002 ShouldNotReachHere(); 1003 break; 1004 } 1005 fingerprint >>= parameter_feature_size; 1006 } 1007 } 1008 } 1009}; 1010 1011 1012class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1013 protected: 1014 const jvalue *_ap; 1015 1016 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 1017 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1018 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1019 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1020 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1021 1022 inline void get_long() { _arguments->push_long((_ap++)->j); } 1023 inline void get_float() { _arguments->push_float((_ap++)->f); } 1024 inline void get_double() { _arguments->push_double((_ap++)->d);} 1025 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1026 1027 inline void set_ap(const jvalue *rap) { _ap = rap; } 1028 1029 public: 1030 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1031 : JNI_ArgumentPusher(signature) { 1032 set_ap(rap); 1033 } 1034 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1035 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1036 set_ap(rap); 1037 } 1038 1039 // Optimized path if we have the bitvector form of signature 1040 void iterate( uint64_t fingerprint ) { 1041 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments 1042 else { 1043 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1044 result_feature_mask); 1045 assert(fingerprint, "Fingerprint should not be 0"); 1046 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1047 while ( 1 ) { 1048 switch ( fingerprint & parameter_feature_mask ) { 1049 case bool_parm: 1050 get_bool(); 1051 break; 1052 case char_parm: 1053 get_char(); 1054 break; 1055 case short_parm: 1056 get_short(); 1057 break; 1058 case byte_parm: 1059 get_byte(); 1060 break; 1061 case int_parm: 1062 get_int(); 1063 break; 1064 case obj_parm: 1065 get_object(); 1066 break; 1067 case long_parm: 1068 get_long(); 1069 break; 1070 case float_parm: 1071 get_float(); 1072 break; 1073 case double_parm: 1074 get_double(); 1075 break; 1076 case done_parm: 1077 return; 1078 break; 1079 default: 1080 ShouldNotReachHere(); 1081 break; 1082 } 1083 fingerprint >>= parameter_feature_size; 1084 } 1085 } 1086 } 1087}; 1088 1089 1090enum JNICallType { 1091 JNI_STATIC, 1092 JNI_VIRTUAL, 1093 JNI_NONVIRTUAL 1094}; 1095 1096 1097 1098static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1099 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1100 1101 // Create object to hold arguments for the JavaCall, and associate it with 1102 // the jni parser 1103 ResourceMark rm(THREAD); 1104 int number_of_parameters = method->size_of_parameters(); 1105 JavaCallArguments java_args(number_of_parameters); 1106 args->set_java_argument_object(&java_args); 1107 1108 assert(method->is_static(), "method should be static"); 1109 1110 // Fill out JavaCallArguments object 1111 args->iterate( Fingerprinter(method).fingerprint() ); 1112 // Initialize result type 1113 result->set_type(args->get_ret_type()); 1114 1115 // Invoke the method. Result is returned as oop. 1116 JavaCalls::call(result, method, &java_args, CHECK); 1117 1118 // Convert result 1119 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1120 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1121 } 1122} 1123 1124 1125static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1126 oop recv = JNIHandles::resolve(receiver); 1127 if (recv == NULL) { 1128 THROW(vmSymbols::java_lang_NullPointerException()); 1129 } 1130 Handle h_recv(THREAD, recv); 1131 1132 int number_of_parameters; 1133 Method* selected_method; 1134 { 1135 Method* m = Method::resolve_jmethod_id(method_id); 1136 number_of_parameters = m->size_of_parameters(); 1137 Klass* holder = m->method_holder(); 1138 if (!(holder)->is_interface()) { 1139 // non-interface call -- for that little speed boost, don't handlize 1140 debug_only(No_Safepoint_Verifier nosafepoint;) 1141 if (call_type == JNI_VIRTUAL) { 1142 // jni_GetMethodID makes sure class is linked and initialized 1143 // so m should have a valid vtable index. 1144 assert(!m->has_itable_index(), ""); 1145 int vtbl_index = m->vtable_index(); 1146 if (vtbl_index != Method::nonvirtual_vtable_index) { 1147 Klass* k = h_recv->klass(); 1148 // k might be an arrayKlassOop but all vtables start at 1149 // the same place. The cast is to avoid virtual call and assertion. 1150 InstanceKlass *ik = (InstanceKlass*)k; 1151 selected_method = ik->method_at_vtable(vtbl_index); 1152 } else { 1153 // final method 1154 selected_method = m; 1155 } 1156 } else { 1157 // JNI_NONVIRTUAL call 1158 selected_method = m; 1159 } 1160 } else { 1161 // interface call 1162 KlassHandle h_holder(THREAD, holder); 1163 1164 if (call_type == JNI_VIRTUAL) { 1165 int itbl_index = m->itable_index(); 1166 Klass* k = h_recv->klass(); 1167 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1168 } else { 1169 selected_method = m; 1170 } 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 should not be static"); 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 KlassHandle k(THREAD, 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 InstanceKlass::cast(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 KlassHandle klass(THREAD, 1349 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1350 1351 // Make sure class is linked and initialized before handing id's out to 1352 // Method*s. 1353 klass()->initialize(CHECK_NULL); 1354 1355 Method* m; 1356 if (name == vmSymbols::object_initializer_name() || 1357 name == vmSymbols::class_initializer_name()) { 1358 // Never search superclasses for constructors 1359 if (klass->oop_is_instance()) { 1360 m = InstanceKlass::cast(klass())->find_method(name, signature); 1361 } else { 1362 m = NULL; 1363 } 1364 } else { 1365 m = klass->lookup_method(name, signature); 1366 if (m == NULL && klass->oop_is_instance()) { 1367 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1368 } 1369 } 1370 if (m == NULL || (m->is_static() != is_static)) { 1371 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1372 } 1373 return m->jmethod_id(); 1374} 1375 1376 1377JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1378 const char *name, const char *sig)) 1379 JNIWrapper("GetMethodID"); 1380 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1381 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1382 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1383 return ret; 1384JNI_END 1385 1386 1387JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1388 const char *name, const char *sig)) 1389 JNIWrapper("GetStaticMethodID"); 1390 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1391 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1392 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1393 return ret; 1394JNI_END 1395 1396 1397 1398// 1399// Calling Methods 1400// 1401 1402 1403#define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1404 , EntryProbe, ReturnProbe) \ 1405\ 1406 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1407 , ReturnProbe); \ 1408\ 1409JNI_ENTRY(ResultType, \ 1410 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1411 JNIWrapper("Call" XSTR(Result) "Method"); \ 1412\ 1413 EntryProbe; \ 1414 ResultType ret = 0;\ 1415 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1416 (const ResultType&)ret);\ 1417\ 1418 va_list args; \ 1419 va_start(args, methodID); \ 1420 JavaValue jvalue(Tag); \ 1421 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1422 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1423 va_end(args); \ 1424 ret = jvalue.get_##ResultType(); \ 1425 return ret;\ 1426JNI_END 1427 1428// the runtime type of subword integral basic types is integer 1429DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1430 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1431 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1432DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1433 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1434 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1435DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1436 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1438DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1439 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1441 1442DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1443 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1444 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1445DEFINE_CALLMETHOD(jint, Int, T_INT, 1446 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1447 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1448DEFINE_CALLMETHOD(jlong, Long, T_LONG 1449 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1450 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1451// Float and double probes don't return value because dtrace doesn't currently support it 1452DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1453 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1454 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1455DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1456 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1457 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1458 1459#define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1460 , EntryProbe, ReturnProbe) \ 1461\ 1462 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1463 , ReturnProbe); \ 1464\ 1465JNI_ENTRY(ResultType, \ 1466 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1467 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1468\ 1469 EntryProbe;\ 1470 ResultType ret = 0;\ 1471 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1472 (const ResultType&)ret);\ 1473\ 1474 JavaValue jvalue(Tag); \ 1475 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1476 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1477 ret = jvalue.get_##ResultType(); \ 1478 return ret;\ 1479JNI_END 1480 1481// the runtime type of subword integral basic types is integer 1482DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1483 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1484 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1485DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1486 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1488DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1489 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1491DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1492 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1494 1495DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1496 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1497 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1498DEFINE_CALLMETHODV(jint, Int, T_INT, 1499 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1500 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1501DEFINE_CALLMETHODV(jlong, Long, T_LONG 1502 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1503 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1504// Float and double probes don't return value because dtrace doesn't currently support it 1505DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1506 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1507 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1508DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1509 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1510 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1511 1512#define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1513 , EntryProbe, ReturnProbe) \ 1514\ 1515 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1516 , ReturnProbe); \ 1517\ 1518JNI_ENTRY(ResultType, \ 1519 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1520 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1521 EntryProbe; \ 1522 ResultType ret = 0;\ 1523 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1524 (const ResultType&)ret);\ 1525\ 1526 JavaValue jvalue(Tag); \ 1527 JNI_ArgumentPusherArray ap(methodID, args); \ 1528 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1529 ret = jvalue.get_##ResultType(); \ 1530 return ret;\ 1531JNI_END 1532 1533// the runtime type of subword integral basic types is integer 1534DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1535 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1536 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1537DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1538 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1539 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1540DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1541 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1543DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1544 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1546 1547DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1548 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1549 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1550DEFINE_CALLMETHODA(jint, Int, T_INT, 1551 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1552 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1553DEFINE_CALLMETHODA(jlong, Long, T_LONG 1554 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1555 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1556// Float and double probes don't return value because dtrace doesn't currently support it 1557DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1558 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1559 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1560DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1561 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1562 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1563 1564DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1565DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1566DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1567 1568 1569JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1570 JNIWrapper("CallVoidMethod"); 1571 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1572 DT_VOID_RETURN_MARK(CallVoidMethod); 1573 1574 va_list args; 1575 va_start(args, methodID); 1576 JavaValue jvalue(T_VOID); 1577 JNI_ArgumentPusherVaArg ap(methodID, args); 1578 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1579 va_end(args); 1580JNI_END 1581 1582 1583JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1584 JNIWrapper("CallVoidMethodV"); 1585 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1586 DT_VOID_RETURN_MARK(CallVoidMethodV); 1587 1588 JavaValue jvalue(T_VOID); 1589 JNI_ArgumentPusherVaArg ap(methodID, args); 1590 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1591JNI_END 1592 1593 1594JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1595 JNIWrapper("CallVoidMethodA"); 1596 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1597 DT_VOID_RETURN_MARK(CallVoidMethodA); 1598 1599 JavaValue jvalue(T_VOID); 1600 JNI_ArgumentPusherArray ap(methodID, args); 1601 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1602JNI_END 1603 1604 1605 1606#define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1607 , EntryProbe, ReturnProbe) \ 1608\ 1609 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1610 , ReturnProbe);\ 1611\ 1612JNI_ENTRY(ResultType, \ 1613 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1614 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1615\ 1616 EntryProbe;\ 1617 ResultType ret;\ 1618 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1619 (const ResultType&)ret);\ 1620\ 1621 va_list args; \ 1622 va_start(args, methodID); \ 1623 JavaValue jvalue(Tag); \ 1624 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1625 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1626 va_end(args); \ 1627 ret = jvalue.get_##ResultType(); \ 1628 return ret;\ 1629JNI_END 1630 1631// the runtime type of subword integral basic types is integer 1632DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1633 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1634 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1635DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1636 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1637 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1638DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1639 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1641DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1642 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1644 1645DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1646 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1647 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1648DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1649 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1650 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1651DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1652 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1653// Float and double probes don't return value because dtrace doesn't currently support it 1654 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1655DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1656 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1657 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1658DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1659 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1660 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1661 1662#define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1663 , EntryProbe, ReturnProbe) \ 1664\ 1665 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1666 , ReturnProbe);\ 1667\ 1668JNI_ENTRY(ResultType, \ 1669 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1670 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1671\ 1672 EntryProbe;\ 1673 ResultType ret;\ 1674 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1675 (const ResultType&)ret);\ 1676\ 1677 JavaValue jvalue(Tag); \ 1678 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1679 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1680 ret = jvalue.get_##ResultType(); \ 1681 return ret;\ 1682JNI_END 1683 1684// the runtime type of subword integral basic types is integer 1685DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1686 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1687 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1688DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1689 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1690 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1691DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1692 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1694DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1695 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1697 1698DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1699 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1700 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1701DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1702 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1703 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1704DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1705 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1706// Float and double probes don't return value because dtrace doesn't currently support it 1707 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1708DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1709 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1710 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1711DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1712 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1713 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1714 1715#define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1716 , EntryProbe, ReturnProbe) \ 1717\ 1718 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1719 , ReturnProbe);\ 1720\ 1721JNI_ENTRY(ResultType, \ 1722 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1723 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1724\ 1725 EntryProbe;\ 1726 ResultType ret;\ 1727 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1728 (const ResultType&)ret);\ 1729\ 1730 JavaValue jvalue(Tag); \ 1731 JNI_ArgumentPusherArray ap(methodID, args); \ 1732 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1733 ret = jvalue.get_##ResultType(); \ 1734 return ret;\ 1735JNI_END 1736 1737// the runtime type of subword integral basic types is integer 1738DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1739 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1740 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1741DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1742 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1743 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1744DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1745 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1747DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1748 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1750 1751DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1752 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1753 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1754DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1755 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1756 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1757DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1758 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1759// Float and double probes don't return value because dtrace doesn't currently support it 1760 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1761DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1762 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1763 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1764DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1765 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1766 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1767 1768DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1769 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1770DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1771 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1772DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1773 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1774 1775JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1776 JNIWrapper("CallNonvirtualVoidMethod"); 1777 1778 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1779 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1780 1781 va_list args; 1782 va_start(args, methodID); 1783 JavaValue jvalue(T_VOID); 1784 JNI_ArgumentPusherVaArg ap(methodID, args); 1785 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1786 va_end(args); 1787JNI_END 1788 1789 1790JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1791 JNIWrapper("CallNonvirtualVoidMethodV"); 1792 1793 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1794 env, obj, cls, (uintptr_t) methodID); 1795 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1796 1797 JavaValue jvalue(T_VOID); 1798 JNI_ArgumentPusherVaArg ap(methodID, args); 1799 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1800JNI_END 1801 1802 1803JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1804 JNIWrapper("CallNonvirtualVoidMethodA"); 1805 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1806 env, obj, cls, (uintptr_t) methodID); 1807 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1808 JavaValue jvalue(T_VOID); 1809 JNI_ArgumentPusherArray ap(methodID, args); 1810 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1811JNI_END 1812 1813 1814 1815#define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1816 , EntryProbe, ResultProbe) \ 1817\ 1818 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1819 , ResultProbe); \ 1820\ 1821JNI_ENTRY(ResultType, \ 1822 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1823 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1824\ 1825 EntryProbe; \ 1826 ResultType ret = 0;\ 1827 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1828 (const ResultType&)ret);\ 1829\ 1830 va_list args; \ 1831 va_start(args, methodID); \ 1832 JavaValue jvalue(Tag); \ 1833 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1834 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1835 va_end(args); \ 1836 ret = jvalue.get_##ResultType(); \ 1837 return ret;\ 1838JNI_END 1839 1840// the runtime type of subword integral basic types is integer 1841DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1842 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1843 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1844DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1845 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1846 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1847DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1848 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1850DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1851 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1853 1854DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1855 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1856 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1857DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1858 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1859 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1860DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1861 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1862 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1863// Float and double probes don't return value because dtrace doesn't currently support it 1864DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1865 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1866 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1867DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1868 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1869 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1870 1871#define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1872 , EntryProbe, ResultProbe) \ 1873\ 1874 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1875 , ResultProbe); \ 1876\ 1877JNI_ENTRY(ResultType, \ 1878 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1879 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1880\ 1881 EntryProbe; \ 1882 ResultType ret = 0;\ 1883 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1884 (const ResultType&)ret);\ 1885\ 1886 JavaValue jvalue(Tag); \ 1887 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1888 /* Make sure class is initialized before trying to invoke its method */ \ 1889 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1890 k()->initialize(CHECK_0); \ 1891 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1892 va_end(args); \ 1893 ret = jvalue.get_##ResultType(); \ 1894 return ret;\ 1895JNI_END 1896 1897// the runtime type of subword integral basic types is integer 1898DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1899 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1900 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1901DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1902 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1903 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1904DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1905 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1907DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1908 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1910 1911DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1912 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1913 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1914DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1915 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1916 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1917DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1918 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1919 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1920// Float and double probes don't return value because dtrace doesn't currently support it 1921DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1922 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1923 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1924DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1925 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1926 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1927 1928#define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1929 , EntryProbe, ResultProbe) \ 1930\ 1931 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1932 , ResultProbe); \ 1933\ 1934JNI_ENTRY(ResultType, \ 1935 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1936 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1937\ 1938 EntryProbe; \ 1939 ResultType ret = 0;\ 1940 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1941 (const ResultType&)ret);\ 1942\ 1943 JavaValue jvalue(Tag); \ 1944 JNI_ArgumentPusherArray ap(methodID, args); \ 1945 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1946 ret = jvalue.get_##ResultType(); \ 1947 return ret;\ 1948JNI_END 1949 1950// the runtime type of subword integral basic types is integer 1951DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1952 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1953 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1954DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1955 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1956 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1957DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1958 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1960DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1961 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1963 1964DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1965 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1966 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1967DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1968 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1969 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1970DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1971 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1972 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1973// Float and double probes don't return value because dtrace doesn't currently support it 1974DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1975 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1976 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1977DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1978 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1979 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1980 1981DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1982 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1983DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1984 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1985DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1986 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1987 1988JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1989 JNIWrapper("CallStaticVoidMethod"); 1990 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1991 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1992 1993 va_list args; 1994 va_start(args, methodID); 1995 JavaValue jvalue(T_VOID); 1996 JNI_ArgumentPusherVaArg ap(methodID, args); 1997 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1998 va_end(args); 1999JNI_END 2000 2001 2002JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 2003 JNIWrapper("CallStaticVoidMethodV"); 2004 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 2005 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 2006 2007 JavaValue jvalue(T_VOID); 2008 JNI_ArgumentPusherVaArg ap(methodID, args); 2009 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2010JNI_END 2011 2012 2013JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2014 JNIWrapper("CallStaticVoidMethodA"); 2015 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2016 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2017 2018 JavaValue jvalue(T_VOID); 2019 JNI_ArgumentPusherArray ap(methodID, args); 2020 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2021JNI_END 2022 2023 2024// 2025// Accessing Fields 2026// 2027 2028 2029DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2030 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2031 2032JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2033 const char *name, const char *sig)) 2034 JNIWrapper("GetFieldID"); 2035 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2036 jfieldID ret = 0; 2037 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2038 2039 // The class should have been loaded (we have an instance of the class 2040 // passed in) so the field and signature should already be in the symbol 2041 // table. If they're not there, the field doesn't exist. 2042 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2043 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2044 if (fieldname == NULL || signame == NULL) { 2045 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2046 } 2047 KlassHandle k(THREAD, 2048 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2049 // Make sure class is initialized before handing id's out to fields 2050 k()->initialize(CHECK_NULL); 2051 2052 fieldDescriptor fd; 2053 if (!k()->oop_is_instance() || 2054 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2055 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2056 } 2057 2058 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2059 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2060 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2061 return ret; 2062JNI_END 2063 2064 2065JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2066 JNIWrapper("GetObjectField"); 2067 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2068 oop o = JNIHandles::resolve_non_null(obj); 2069 Klass* k = o->klass(); 2070 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2071 // Keep JVMTI addition small and only check enabled flag here. 2072 // jni_GetField_probe() assumes that is okay to create handles. 2073 if (JvmtiExport::should_post_field_access()) { 2074 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2075 } 2076 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2077#if INCLUDE_ALL_GCS 2078 // If G1 is enabled and we are accessing the value of the referent 2079 // field in a reference object then we need to register a non-null 2080 // referent with the SATB barrier. 2081 if (UseG1GC) { 2082 bool needs_barrier = false; 2083 2084 if (ret != NULL && 2085 offset == java_lang_ref_Reference::referent_offset && 2086 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2087 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2088 needs_barrier = true; 2089 } 2090 2091 if (needs_barrier) { 2092 oop referent = JNIHandles::resolve(ret); 2093 G1SATBCardTableModRefBS::enqueue(referent); 2094 } 2095 } 2096#endif // INCLUDE_ALL_GCS 2097HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2098 return ret; 2099JNI_END 2100 2101 2102 2103#define DEFINE_GETFIELD(Return,Fieldname,Result \ 2104 , EntryProbe, ReturnProbe) \ 2105\ 2106 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2107 , ReturnProbe); \ 2108\ 2109JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2110 JNIWrapper("Get" XSTR(Result) "Field"); \ 2111\ 2112 EntryProbe; \ 2113 Return ret = 0;\ 2114 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2115\ 2116 oop o = JNIHandles::resolve_non_null(obj); \ 2117 Klass* k = o->klass(); \ 2118 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2119 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2120 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2121 /* and creates a ResetNoHandleMark. */ \ 2122 if (JvmtiExport::should_post_field_access()) { \ 2123 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2124 } \ 2125 ret = o->Fieldname##_field(offset); \ 2126 return ret; \ 2127JNI_END 2128 2129DEFINE_GETFIELD(jboolean, bool, Boolean 2130 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2131 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2132DEFINE_GETFIELD(jbyte, byte, Byte 2133 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2134 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2135DEFINE_GETFIELD(jchar, char, Char 2136 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2137 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2138DEFINE_GETFIELD(jshort, short, Short 2139 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2140 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2141DEFINE_GETFIELD(jint, int, Int 2142 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2143 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2144DEFINE_GETFIELD(jlong, long, Long 2145 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2146 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2147// Float and double probes don't return value because dtrace doesn't currently support it 2148DEFINE_GETFIELD(jfloat, float, Float 2149 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2150 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2151DEFINE_GETFIELD(jdouble, double, Double 2152 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2153 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2154 2155address jni_GetBooleanField_addr() { 2156 return (address)jni_GetBooleanField; 2157} 2158address jni_GetByteField_addr() { 2159 return (address)jni_GetByteField; 2160} 2161address jni_GetCharField_addr() { 2162 return (address)jni_GetCharField; 2163} 2164address jni_GetShortField_addr() { 2165 return (address)jni_GetShortField; 2166} 2167address jni_GetIntField_addr() { 2168 return (address)jni_GetIntField; 2169} 2170address jni_GetLongField_addr() { 2171 return (address)jni_GetLongField; 2172} 2173address jni_GetFloatField_addr() { 2174 return (address)jni_GetFloatField; 2175} 2176address jni_GetDoubleField_addr() { 2177 return (address)jni_GetDoubleField; 2178} 2179 2180JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2181 JNIWrapper("SetObjectField"); 2182 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2183 oop o = JNIHandles::resolve_non_null(obj); 2184 Klass* k = o->klass(); 2185 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2186 // Keep JVMTI addition small and only check enabled flag here. 2187 // jni_SetField_probe_nh() assumes that is not okay to create handles 2188 // and creates a ResetNoHandleMark. 2189 if (JvmtiExport::should_post_field_modification()) { 2190 jvalue field_value; 2191 field_value.l = value; 2192 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2193 } 2194 o->obj_field_put(offset, JNIHandles::resolve(value)); 2195 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2196JNI_END 2197 2198 2199#define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2200 , EntryProbe, ReturnProbe) \ 2201\ 2202JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2203 JNIWrapper("Set" XSTR(Result) "Field"); \ 2204\ 2205 EntryProbe; \ 2206\ 2207 oop o = JNIHandles::resolve_non_null(obj); \ 2208 Klass* k = o->klass(); \ 2209 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2210 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2211 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2212 /* and creates a ResetNoHandleMark. */ \ 2213 if (JvmtiExport::should_post_field_modification()) { \ 2214 jvalue field_value; \ 2215 field_value.unionType = value; \ 2216 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2217 } \ 2218 o->Fieldname##_field_put(offset, value); \ 2219 ReturnProbe; \ 2220JNI_END 2221 2222DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2223 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2224 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2225DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2226 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2227 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2228DEFINE_SETFIELD(jchar, char, Char, 'C', c 2229 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2230 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2231DEFINE_SETFIELD(jshort, short, Short, 'S', s 2232 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2233 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2234DEFINE_SETFIELD(jint, int, Int, 'I', i 2235 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2236 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2237DEFINE_SETFIELD(jlong, long, Long, 'J', j 2238 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2239 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2240// Float and double probes don't return value because dtrace doesn't currently support it 2241DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2242 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2243 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2244DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2245 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2246 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2247 2248DT_RETURN_MARK_DECL(ToReflectedField, jobject 2249 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2250 2251JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2252 JNIWrapper("ToReflectedField"); 2253 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2254 jobject ret = NULL; 2255 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2256 2257 fieldDescriptor fd; 2258 bool found = false; 2259 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2260 2261 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2262 2263 if (isStatic) { 2264 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2265 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2266 assert(id->is_static_field_id(), "invalid static field id"); 2267 found = id->find_local_field(&fd); 2268 } else { 2269 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2270 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2271 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2272 } 2273 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2274 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 2275 ret = JNIHandles::make_local(env, reflected); 2276 return ret; 2277JNI_END 2278 2279 2280// 2281// Accessing Static Fields 2282// 2283DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2284 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2285 2286JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2287 const char *name, const char *sig)) 2288 JNIWrapper("GetStaticFieldID"); 2289 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2290 jfieldID ret = NULL; 2291 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2292 2293 // The class should have been loaded (we have an instance of the class 2294 // passed in) so the field and signature should already be in the symbol 2295 // table. If they're not there, the field doesn't exist. 2296 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2297 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2298 if (fieldname == NULL || signame == NULL) { 2299 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2300 } 2301 KlassHandle k(THREAD, 2302 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2303 // Make sure class is initialized before handing id's out to static fields 2304 k()->initialize(CHECK_NULL); 2305 2306 fieldDescriptor fd; 2307 if (!k()->oop_is_instance() || 2308 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2309 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2310 } 2311 2312 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2313 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2314 debug_only(id->set_is_static_field_id();) 2315 2316 debug_only(id->verify(fd.field_holder())); 2317 2318 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2319 return ret; 2320JNI_END 2321 2322 2323JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2324 JNIWrapper("GetStaticObjectField"); 2325 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2326#if INCLUDE_JNI_CHECK 2327 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2328#endif // INCLUDE_JNI_CHECK 2329 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2330 assert(id->is_static_field_id(), "invalid static field id"); 2331 // Keep JVMTI addition small and only check enabled flag here. 2332 // jni_GetField_probe() assumes that is okay to create handles. 2333 if (JvmtiExport::should_post_field_access()) { 2334 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2335 } 2336 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2337 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2338 return ret; 2339JNI_END 2340 2341 2342#define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2343 , EntryProbe, ReturnProbe) \ 2344\ 2345 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2346 , ReturnProbe); \ 2347\ 2348JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2349 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2350 EntryProbe; \ 2351 Return ret = 0;\ 2352 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2353 (const Return&)ret);\ 2354 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2355 assert(id->is_static_field_id(), "invalid static field id"); \ 2356 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2357 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2358 if (JvmtiExport::should_post_field_access()) { \ 2359 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2360 } \ 2361 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2362 return ret;\ 2363JNI_END 2364 2365DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2366 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2367DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2368 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2369DEFINE_GETSTATICFIELD(jchar, char, Char 2370 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2371DEFINE_GETSTATICFIELD(jshort, short, Short 2372 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2373DEFINE_GETSTATICFIELD(jint, int, Int 2374 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2375DEFINE_GETSTATICFIELD(jlong, long, Long 2376 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2377// Float and double probes don't return value because dtrace doesn't currently support it 2378DEFINE_GETSTATICFIELD(jfloat, float, Float 2379 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2380DEFINE_GETSTATICFIELD(jdouble, double, Double 2381 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2382 2383JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2384 JNIWrapper("SetStaticObjectField"); 2385 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2386 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2387 assert(id->is_static_field_id(), "invalid static field id"); 2388 // Keep JVMTI addition small and only check enabled flag here. 2389 // jni_SetField_probe() assumes that is okay to create handles. 2390 if (JvmtiExport::should_post_field_modification()) { 2391 jvalue field_value; 2392 field_value.l = value; 2393 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2394 } 2395 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2396 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2397JNI_END 2398 2399 2400 2401#define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2402 , EntryProbe, ReturnProbe) \ 2403\ 2404JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2405 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2406 EntryProbe; \ 2407\ 2408 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2409 assert(id->is_static_field_id(), "invalid static field id"); \ 2410 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2411 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2412 if (JvmtiExport::should_post_field_modification()) { \ 2413 jvalue field_value; \ 2414 field_value.unionType = value; \ 2415 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2416 } \ 2417 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2418 ReturnProbe;\ 2419JNI_END 2420 2421DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2422 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2423 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2424DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2425 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2426 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2427DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2428 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2429 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2430DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2431 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2432 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2433DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2434 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2435 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2436DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2437 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2438 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2439// Float and double probes don't return value because dtrace doesn't currently support it 2440DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2441 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2442 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2443DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2444 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2445 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2446 2447// 2448// String Operations 2449// 2450 2451// Unicode Interface 2452 2453DT_RETURN_MARK_DECL(NewString, jstring 2454 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2455 2456JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2457 JNIWrapper("NewString"); 2458 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2459 jstring ret = NULL; 2460 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2461 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2462 ret = (jstring) JNIHandles::make_local(env, string); 2463 return ret; 2464JNI_END 2465 2466 2467JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2468 JNIWrapper("GetStringLength"); 2469 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2470 jsize ret = 0; 2471 oop s = JNIHandles::resolve_non_null(string); 2472 if (java_lang_String::value(s) != NULL) { 2473 ret = java_lang_String::length(s); 2474 } 2475 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2476 return ret; 2477JNI_END 2478 2479 2480JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2481 JNIEnv *env, jstring string, jboolean *isCopy)) 2482 JNIWrapper("GetStringChars"); 2483 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2484 jchar* buf = NULL; 2485 oop s = JNIHandles::resolve_non_null(string); 2486 typeArrayOop s_value = java_lang_String::value(s); 2487 if (s_value != NULL) { 2488 int s_len = java_lang_String::length(s); 2489 int s_offset = java_lang_String::offset(s); 2490 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2491 /* JNI Specification states return NULL on OOM */ 2492 if (buf != NULL) { 2493 if (s_len > 0) { 2494 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); 2495 } 2496 buf[s_len] = 0; 2497 //%note jni_5 2498 if (isCopy != NULL) { 2499 *isCopy = JNI_TRUE; 2500 } 2501 } 2502 } 2503 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2504 return buf; 2505JNI_END 2506 2507 2508JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2509 JNIWrapper("ReleaseStringChars"); 2510 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2511 //%note jni_6 2512 if (chars != NULL) { 2513 // Since String objects are supposed to be immutable, don't copy any 2514 // new data back. A bad user will have to go after the char array. 2515 FreeHeap((void*) chars); 2516 } 2517 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2518JNI_END 2519 2520 2521// UTF Interface 2522 2523DT_RETURN_MARK_DECL(NewStringUTF, jstring 2524 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2525 2526JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2527 JNIWrapper("NewStringUTF"); 2528 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2529 jstring ret; 2530 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2531 2532 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2533 ret = (jstring) JNIHandles::make_local(env, result); 2534 return ret; 2535JNI_END 2536 2537 2538JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2539 JNIWrapper("GetStringUTFLength"); 2540 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2541 jsize ret = 0; 2542 oop java_string = JNIHandles::resolve_non_null(string); 2543 if (java_lang_String::value(java_string) != NULL) { 2544 ret = java_lang_String::utf8_length(java_string); 2545 } 2546 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2547 return ret; 2548JNI_END 2549 2550 2551JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2552 JNIWrapper("GetStringUTFChars"); 2553 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2554 char* result = NULL; 2555 oop java_string = JNIHandles::resolve_non_null(string); 2556 if (java_lang_String::value(java_string) != NULL) { 2557 size_t length = java_lang_String::utf8_length(java_string); 2558 /* JNI Specification states return NULL on OOM */ 2559 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2560 if (result != NULL) { 2561 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2562 if (isCopy != NULL) { 2563 *isCopy = JNI_TRUE; 2564 } 2565 } 2566 } 2567 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2568 return result; 2569JNI_END 2570 2571 2572JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2573 JNIWrapper("ReleaseStringUTFChars"); 2574 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2575 if (chars != NULL) { 2576 FreeHeap((char*) chars); 2577 } 2578HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2579JNI_END 2580 2581 2582JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2583 JNIWrapper("GetArrayLength"); 2584 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2585 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2586 assert(a->is_array(), "must be array"); 2587 jsize ret = a->length(); 2588 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2589 return ret; 2590JNI_END 2591 2592 2593// 2594// Object Array Operations 2595// 2596 2597DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2598 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2599 2600JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2601 JNIWrapper("NewObjectArray"); 2602 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2603 jobjectArray ret = NULL; 2604 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2605 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2606 Klass* ako = ek()->array_klass(CHECK_NULL); 2607 KlassHandle ak = KlassHandle(THREAD, ako); 2608 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2609 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2610 oop initial_value = JNIHandles::resolve(initialElement); 2611 if (initial_value != NULL) { // array already initialized with NULL 2612 for (int index = 0; index < length; index++) { 2613 result->obj_at_put(index, initial_value); 2614 } 2615 } 2616 ret = (jobjectArray) JNIHandles::make_local(env, result); 2617 return ret; 2618JNI_END 2619 2620DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2621 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2622 2623JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2624 JNIWrapper("GetObjectArrayElement"); 2625 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2626 jobject ret = NULL; 2627 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2628 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2629 if (a->is_within_bounds(index)) { 2630 ret = JNIHandles::make_local(env, a->obj_at(index)); 2631 return ret; 2632 } else { 2633 char buf[jintAsStringSize]; 2634 sprintf(buf, "%d", index); 2635 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2636 } 2637JNI_END 2638 2639DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2640 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2641 2642JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2643 JNIWrapper("SetObjectArrayElement"); 2644 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2645 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2646 2647 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2648 oop v = JNIHandles::resolve(value); 2649 if (a->is_within_bounds(index)) { 2650 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2651 a->obj_at_put(index, v); 2652 } else { 2653 THROW(vmSymbols::java_lang_ArrayStoreException()); 2654 } 2655 } else { 2656 char buf[jintAsStringSize]; 2657 sprintf(buf, "%d", index); 2658 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2659 } 2660JNI_END 2661 2662 2663 2664#define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2665 ,EntryProbe,ReturnProbe) \ 2666\ 2667 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2668 , ReturnProbe); \ 2669\ 2670JNI_ENTRY(Return, \ 2671 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2672 JNIWrapper("New" XSTR(Result) "Array"); \ 2673 EntryProbe; \ 2674 Return ret = NULL;\ 2675 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2676\ 2677 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2678 ret = (Return) JNIHandles::make_local(env, obj); \ 2679 return ret;\ 2680JNI_END 2681 2682DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2683 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2684 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2685DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2686 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2687 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2688DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2689 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2690 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2691DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2692 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2693 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2694DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2695 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2696 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2697DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2698 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2699 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2700DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2701 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2702 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2703DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2704 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2705 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2706 2707// Return an address which will fault if the caller writes to it. 2708 2709static char* get_bad_address() { 2710 static char* bad_address = NULL; 2711 if (bad_address == NULL) { 2712 size_t size = os::vm_allocation_granularity(); 2713 bad_address = os::reserve_memory(size); 2714 if (bad_address != NULL) { 2715 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2716 /*is_committed*/false); 2717 } 2718 } 2719 return bad_address; 2720} 2721 2722 2723 2724#define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2725 , EntryProbe, ReturnProbe) \ 2726\ 2727JNI_QUICK_ENTRY(ElementType*, \ 2728 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2729 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2730 EntryProbe; \ 2731 /* allocate an chunk of memory in c land */ \ 2732 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2733 ElementType* result; \ 2734 int len = a->length(); \ 2735 if (len == 0) { \ 2736 /* Empty array: legal but useless, can't return NULL. \ 2737 * Return a pointer to something useless. \ 2738 * Avoid asserts in typeArrayOop. */ \ 2739 result = (ElementType*)get_bad_address(); \ 2740 } else { \ 2741 /* JNI Specification states return NULL on OOM */ \ 2742 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2743 if (result != NULL) { \ 2744 /* copy the array to the c chunk */ \ 2745 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2746 if (isCopy) { \ 2747 *isCopy = JNI_TRUE; \ 2748 } \ 2749 } \ 2750 } \ 2751 ReturnProbe; \ 2752 return result; \ 2753JNI_END 2754 2755DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2756 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2757 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2758DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2759 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2760 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2761DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2762 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2763 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2764DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2765 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2766 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2767DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2768 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2769 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2770DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2771 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2772 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2773// Float and double probes don't return value because dtrace doesn't currently support it 2774DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2775 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2776 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2777DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2778 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2779 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2780 2781 2782#define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2783 , EntryProbe, ReturnProbe);\ 2784\ 2785JNI_QUICK_ENTRY(void, \ 2786 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2787 ElementType *buf, jint mode)) \ 2788 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2789 EntryProbe; \ 2790 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2791 int len = a->length(); \ 2792 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2793 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2794 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2795 } \ 2796 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2797 FreeHeap(buf); \ 2798 } \ 2799 } \ 2800 ReturnProbe; \ 2801JNI_END 2802 2803DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2804 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2805 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2806DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2807 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2808 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2809DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2810 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2811 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2812DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2813 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2814 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2815DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2816 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2817 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2818DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2819 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2820 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2821DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2822 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2823 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2824DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2825 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2826 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2827 2828 2829#define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2830 , EntryProbe, ReturnProbe); \ 2831 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2832 , ReturnProbe); \ 2833\ 2834JNI_ENTRY(void, \ 2835jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2836 jsize len, ElementType *buf)) \ 2837 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2838 EntryProbe; \ 2839 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2840 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2841 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2842 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2843 } else { \ 2844 if (len > 0) { \ 2845 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2846 memcpy((u_char*) buf, \ 2847 (u_char*) src->Tag##_at_addr(start), \ 2848 len << sc); \ 2849 } \ 2850 } \ 2851JNI_END 2852 2853DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2854 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2855 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2856DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2857 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2858 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2859DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2860 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2861 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2862DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2863 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2864 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2865DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2866 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2867 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2868DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2869 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2870 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2871DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2872 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2873 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2874DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2875 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2876 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2877 2878 2879#define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2880 , EntryProbe, ReturnProbe); \ 2881 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2882 ,ReturnProbe); \ 2883\ 2884JNI_ENTRY(void, \ 2885jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2886 jsize len, const ElementType *buf)) \ 2887 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2888 EntryProbe; \ 2889 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2890 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2891 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2892 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2893 } else { \ 2894 if (len > 0) { \ 2895 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2896 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2897 (u_char*) buf, \ 2898 len << sc); \ 2899 } \ 2900 } \ 2901JNI_END 2902 2903DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2904 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2905 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2906DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2907 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2908 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2909DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2910 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2911 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2912DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2913 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2914 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2915DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2916 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2917 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2918DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2919 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2920 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2921DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2922 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2923 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2924DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2925 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2926 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2927 2928 2929// 2930// Interception of natives 2931// 2932 2933// The RegisterNatives call being attempted tried to register with a method that 2934// is not native. Ask JVM TI what prefixes have been specified. Then check 2935// to see if the native method is now wrapped with the prefixes. See the 2936// SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2937static Method* find_prefixed_native(KlassHandle k, 2938 Symbol* name, Symbol* signature, TRAPS) { 2939#if INCLUDE_JVMTI 2940 ResourceMark rm(THREAD); 2941 Method* method; 2942 int name_len = name->utf8_length(); 2943 char* name_str = name->as_utf8(); 2944 int prefix_count; 2945 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2946 for (int i = 0; i < prefix_count; i++) { 2947 char* prefix = prefixes[i]; 2948 int prefix_len = (int)strlen(prefix); 2949 2950 // try adding this prefix to the method name and see if it matches another method name 2951 int trial_len = name_len + prefix_len; 2952 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2953 strcpy(trial_name_str, prefix); 2954 strcat(trial_name_str, name_str); 2955 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2956 if (trial_name == NULL) { 2957 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2958 } 2959 method = k()->lookup_method(trial_name, signature); 2960 if (method == NULL) { 2961 continue; // signature doesn't match, try the next prefix 2962 } 2963 if (method->is_native()) { 2964 method->set_is_prefixed_native(); 2965 return method; // wahoo, we found a prefixed version of the method, return it 2966 } 2967 // found as non-native, so prefix is good, add it, probably just need more prefixes 2968 name_len = trial_len; 2969 name_str = trial_name_str; 2970 } 2971#endif // INCLUDE_JVMTI 2972 return NULL; // not found 2973} 2974 2975static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2976 Method* method = k()->lookup_method(name, signature); 2977 if (method == NULL) { 2978 ResourceMark rm; 2979 stringStream st; 2980 st.print("Method %s name or signature does not match", 2981 Method::name_and_sig_as_C_string(k(), name, signature)); 2982 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2983 } 2984 if (!method->is_native()) { 2985 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2986 method = find_prefixed_native(k, name, signature, THREAD); 2987 if (method == NULL) { 2988 ResourceMark rm; 2989 stringStream st; 2990 st.print("Method %s is not declared as native", 2991 Method::name_and_sig_as_C_string(k(), name, signature)); 2992 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2993 } 2994 } 2995 2996 if (entry != NULL) { 2997 method->set_native_function(entry, 2998 Method::native_bind_event_is_interesting); 2999 } else { 3000 method->clear_native_function(); 3001 } 3002 if (PrintJNIResolving) { 3003 ResourceMark rm(THREAD); 3004 tty->print_cr("[Registering JNI native method %s.%s]", 3005 method->method_holder()->external_name(), 3006 method->name()->as_C_string()); 3007 } 3008 return true; 3009} 3010 3011DT_RETURN_MARK_DECL(RegisterNatives, jint 3012 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3013 3014JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3015 const JNINativeMethod *methods, 3016 jint nMethods)) 3017 JNIWrapper("RegisterNatives"); 3018 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3019 jint ret = 0; 3020 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3021 3022 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3023 3024 for (int index = 0; index < nMethods; index++) { 3025 const char* meth_name = methods[index].name; 3026 const char* meth_sig = methods[index].signature; 3027 int meth_name_len = (int)strlen(meth_name); 3028 3029 // The class should have been loaded (we have an instance of the class 3030 // passed in) so the method and signature should already be in the symbol 3031 // table. If they're not there, the method doesn't exist. 3032 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3033 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3034 3035 if (name == NULL || signature == NULL) { 3036 ResourceMark rm; 3037 stringStream st; 3038 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3039 // Must return negative value on failure 3040 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3041 } 3042 3043 bool res = register_native(h_k, name, signature, 3044 (address) methods[index].fnPtr, THREAD); 3045 if (!res) { 3046 ret = -1; 3047 break; 3048 } 3049 } 3050 return ret; 3051JNI_END 3052 3053 3054JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3055 JNIWrapper("UnregisterNatives"); 3056 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3057 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3058 //%note jni_2 3059 if (k->oop_is_instance()) { 3060 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3061 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3062 if (m->is_native()) { 3063 m->clear_native_function(); 3064 m->set_signature_handler(NULL); 3065 } 3066 } 3067 } 3068 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3069 return 0; 3070JNI_END 3071 3072// 3073// Monitor functions 3074// 3075 3076DT_RETURN_MARK_DECL(MonitorEnter, jint 3077 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3078 3079JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3080 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3081 jint ret = JNI_ERR; 3082 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3083 3084 // If the object is null, we can't do anything with it 3085 if (jobj == NULL) { 3086 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3087 } 3088 3089 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3090 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3091 ret = JNI_OK; 3092 return ret; 3093JNI_END 3094 3095DT_RETURN_MARK_DECL(MonitorExit, jint 3096 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3097 3098JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3099 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3100 jint ret = JNI_ERR; 3101 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3102 3103 // Don't do anything with a null object 3104 if (jobj == NULL) { 3105 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3106 } 3107 3108 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3109 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3110 3111 ret = JNI_OK; 3112 return ret; 3113JNI_END 3114 3115// 3116// Extensions 3117// 3118 3119DT_VOID_RETURN_MARK_DECL(GetStringRegion 3120 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3121 3122JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3123 JNIWrapper("GetStringRegion"); 3124 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3125 DT_VOID_RETURN_MARK(GetStringRegion); 3126 oop s = JNIHandles::resolve_non_null(string); 3127 int s_len = java_lang_String::length(s); 3128 if (start < 0 || len < 0 || start + len > s_len) { 3129 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3130 } else { 3131 if (len > 0) { 3132 int s_offset = java_lang_String::offset(s); 3133 typeArrayOop s_value = java_lang_String::value(s); 3134 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); 3135 } 3136 } 3137JNI_END 3138 3139DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3140 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3141 3142JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3143 JNIWrapper("GetStringUTFRegion"); 3144 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3145 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3146 oop s = JNIHandles::resolve_non_null(string); 3147 int s_len = java_lang_String::length(s); 3148 if (start < 0 || len < 0 || start + len > s_len) { 3149 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3150 } else { 3151 //%note jni_7 3152 if (len > 0) { 3153 ResourceMark rm(THREAD); 3154 char *utf_region = java_lang_String::as_utf8_string(s, start, len); 3155 int utf_len = (int)strlen(utf_region); 3156 memcpy(buf, utf_region, utf_len); 3157 buf[utf_len] = 0; 3158 } else { 3159 // JDK null-terminates the buffer even in len is zero 3160 if (buf != NULL) { 3161 buf[0] = 0; 3162 } 3163 } 3164 } 3165JNI_END 3166 3167 3168JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3169 JNIWrapper("GetPrimitiveArrayCritical"); 3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3171 GC_locker::lock_critical(thread); 3172 if (isCopy != NULL) { 3173 *isCopy = JNI_FALSE; 3174 } 3175 oop a = JNIHandles::resolve_non_null(array); 3176 assert(a->is_array(), "just checking"); 3177 BasicType type; 3178 if (a->is_objArray()) { 3179 type = T_OBJECT; 3180 } else { 3181 type = TypeArrayKlass::cast(a->klass())->element_type(); 3182 } 3183 void* ret = arrayOop(a)->base(type); 3184 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3185 return ret; 3186JNI_END 3187 3188 3189JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3190 JNIWrapper("ReleasePrimitiveArrayCritical"); 3191 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3192 // The array, carray and mode arguments are ignored 3193 GC_locker::unlock_critical(thread); 3194HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3195JNI_END 3196 3197 3198JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3199 JNIWrapper("GetStringCritical"); 3200 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3201 GC_locker::lock_critical(thread); 3202 if (isCopy != NULL) { 3203 *isCopy = JNI_FALSE; 3204 } 3205 oop s = JNIHandles::resolve_non_null(string); 3206 int s_len = java_lang_String::length(s); 3207 typeArrayOop s_value = java_lang_String::value(s); 3208 int s_offset = java_lang_String::offset(s); 3209 const jchar* ret; 3210 if (s_len > 0) { 3211 ret = s_value->char_at_addr(s_offset); 3212 } else { 3213 ret = (jchar*) s_value->base(T_CHAR); 3214 } 3215 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3216 return ret; 3217JNI_END 3218 3219 3220JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3221 JNIWrapper("ReleaseStringCritical"); 3222 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3223 // The str and chars arguments are ignored 3224 GC_locker::unlock_critical(thread); 3225HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3226JNI_END 3227 3228 3229JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3230 JNIWrapper("jni_NewWeakGlobalRef"); 3231 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3232 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3233 jweak ret = JNIHandles::make_weak_global(ref_handle); 3234 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3235 return ret; 3236JNI_END 3237 3238// Must be JNI_ENTRY (with HandleMark) 3239JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3240 JNIWrapper("jni_DeleteWeakGlobalRef"); 3241 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3242 JNIHandles::destroy_weak_global(ref); 3243 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3244JNI_END 3245 3246 3247JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3248 JNIWrapper("jni_ExceptionCheck"); 3249 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3250 jni_check_async_exceptions(thread); 3251 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3252 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3253 return ret; 3254JNI_END 3255 3256 3257// Initialization state for three routines below relating to 3258// java.nio.DirectBuffers 3259static jint directBufferSupportInitializeStarted = 0; 3260static volatile jint directBufferSupportInitializeEnded = 0; 3261static volatile jint directBufferSupportInitializeFailed = 0; 3262static jclass bufferClass = NULL; 3263static jclass directBufferClass = NULL; 3264static jclass directByteBufferClass = NULL; 3265static jmethodID directByteBufferConstructor = NULL; 3266static jfieldID directBufferAddressField = NULL; 3267static jfieldID bufferCapacityField = NULL; 3268 3269static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3270 Handle loader; // null (bootstrap) loader 3271 Handle protection_domain; // null protection domain 3272 3273 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3274 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3275 3276 if (TraceClassResolution && result != NULL) { 3277 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3278 } 3279 return result; 3280} 3281 3282// These lookups are done with the NULL (bootstrap) ClassLoader to 3283// circumvent any security checks that would be done by jni_FindClass. 3284JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3285{ 3286 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3287 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3288 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3289 return true; 3290} 3291JNI_END 3292 3293 3294static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3295 if (directBufferSupportInitializeFailed) { 3296 return false; 3297 } 3298 3299 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3300 if (!lookupDirectBufferClasses(env)) { 3301 directBufferSupportInitializeFailed = 1; 3302 return false; 3303 } 3304 3305 // Make global references for these 3306 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3307 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3308 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3309 3310 // Get needed field and method IDs 3311 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3312 if (env->ExceptionCheck()) { 3313 env->ExceptionClear(); 3314 directBufferSupportInitializeFailed = 1; 3315 return false; 3316 } 3317 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3318 if (env->ExceptionCheck()) { 3319 env->ExceptionClear(); 3320 directBufferSupportInitializeFailed = 1; 3321 return false; 3322 } 3323 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3324 if (env->ExceptionCheck()) { 3325 env->ExceptionClear(); 3326 directBufferSupportInitializeFailed = 1; 3327 return false; 3328 } 3329 3330 if ((directByteBufferConstructor == NULL) || 3331 (directBufferAddressField == NULL) || 3332 (bufferCapacityField == NULL)) { 3333 directBufferSupportInitializeFailed = 1; 3334 return false; 3335 } 3336 3337 directBufferSupportInitializeEnded = 1; 3338 } else { 3339 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3340 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls 3341 // os::sleep which requires the VM state transition. On other platforms, it 3342 // is not necessary. The following call to change the VM state is purposely 3343 // put inside the loop to avoid potential deadlock when multiple threads 3344 // try to call this method. See 6791815 for more details. 3345 ThreadInVMfromNative tivn(thread); 3346 os::yield_all(); 3347 } 3348 } 3349 3350 return !directBufferSupportInitializeFailed; 3351} 3352 3353extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3354{ 3355 // thread_from_jni_environment() will block if VM is gone. 3356 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3357 3358 JNIWrapper("jni_NewDirectByteBuffer"); 3359 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3360 3361 if (!directBufferSupportInitializeEnded) { 3362 if (!initializeDirectBufferSupport(env, thread)) { 3363 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3364 return NULL; 3365 } 3366 } 3367 3368 // Being paranoid about accidental sign extension on address 3369 jlong addr = (jlong) ((uintptr_t) address); 3370 // NOTE that package-private DirectByteBuffer constructor currently 3371 // takes int capacity 3372 jint cap = (jint) capacity; 3373 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3375 return ret; 3376} 3377 3378DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3379 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3380 3381extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3382{ 3383 // thread_from_jni_environment() will block if VM is gone. 3384 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3385 3386 JNIWrapper("jni_GetDirectBufferAddress"); 3387 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3388 void* ret = NULL; 3389 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3390 3391 if (!directBufferSupportInitializeEnded) { 3392 if (!initializeDirectBufferSupport(env, thread)) { 3393 return 0; 3394 } 3395 } 3396 3397 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3398 return 0; 3399 } 3400 3401 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3402 return ret; 3403} 3404 3405DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3406 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3407 3408extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3409{ 3410 // thread_from_jni_environment() will block if VM is gone. 3411 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3412 3413 JNIWrapper("jni_GetDirectBufferCapacity"); 3414 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3415 jlong ret = -1; 3416 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3417 3418 if (!directBufferSupportInitializeEnded) { 3419 if (!initializeDirectBufferSupport(env, thread)) { 3420 ret = 0; 3421 return ret; 3422 } 3423 } 3424 3425 if (buf == NULL) { 3426 return -1; 3427 } 3428 3429 if (!env->IsInstanceOf(buf, directBufferClass)) { 3430 return -1; 3431 } 3432 3433 // NOTE that capacity is currently an int in the implementation 3434 ret = env->GetIntField(buf, bufferCapacityField); 3435 return ret; 3436} 3437 3438 3439JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3440 JNIWrapper("GetVersion"); 3441 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3442 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3443 return CurrentVersion; 3444JNI_END 3445 3446extern struct JavaVM_ main_vm; 3447 3448JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3449 JNIWrapper("jni_GetJavaVM"); 3450 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3451 *vm = (JavaVM *)(&main_vm); 3452 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3453 return JNI_OK; 3454JNI_END 3455 3456// Structure containing all jni functions 3457struct JNINativeInterface_ jni_NativeInterface = { 3458 NULL, 3459 NULL, 3460 NULL, 3461 3462 NULL, 3463 3464 jni_GetVersion, 3465 3466 jni_DefineClass, 3467 jni_FindClass, 3468 3469 jni_FromReflectedMethod, 3470 jni_FromReflectedField, 3471 3472 jni_ToReflectedMethod, 3473 3474 jni_GetSuperclass, 3475 jni_IsAssignableFrom, 3476 3477 jni_ToReflectedField, 3478 3479 jni_Throw, 3480 jni_ThrowNew, 3481 jni_ExceptionOccurred, 3482 jni_ExceptionDescribe, 3483 jni_ExceptionClear, 3484 jni_FatalError, 3485 3486 jni_PushLocalFrame, 3487 jni_PopLocalFrame, 3488 3489 jni_NewGlobalRef, 3490 jni_DeleteGlobalRef, 3491 jni_DeleteLocalRef, 3492 jni_IsSameObject, 3493 3494 jni_NewLocalRef, 3495 jni_EnsureLocalCapacity, 3496 3497 jni_AllocObject, 3498 jni_NewObject, 3499 jni_NewObjectV, 3500 jni_NewObjectA, 3501 3502 jni_GetObjectClass, 3503 jni_IsInstanceOf, 3504 3505 jni_GetMethodID, 3506 3507 jni_CallObjectMethod, 3508 jni_CallObjectMethodV, 3509 jni_CallObjectMethodA, 3510 jni_CallBooleanMethod, 3511 jni_CallBooleanMethodV, 3512 jni_CallBooleanMethodA, 3513 jni_CallByteMethod, 3514 jni_CallByteMethodV, 3515 jni_CallByteMethodA, 3516 jni_CallCharMethod, 3517 jni_CallCharMethodV, 3518 jni_CallCharMethodA, 3519 jni_CallShortMethod, 3520 jni_CallShortMethodV, 3521 jni_CallShortMethodA, 3522 jni_CallIntMethod, 3523 jni_CallIntMethodV, 3524 jni_CallIntMethodA, 3525 jni_CallLongMethod, 3526 jni_CallLongMethodV, 3527 jni_CallLongMethodA, 3528 jni_CallFloatMethod, 3529 jni_CallFloatMethodV, 3530 jni_CallFloatMethodA, 3531 jni_CallDoubleMethod, 3532 jni_CallDoubleMethodV, 3533 jni_CallDoubleMethodA, 3534 jni_CallVoidMethod, 3535 jni_CallVoidMethodV, 3536 jni_CallVoidMethodA, 3537 3538 jni_CallNonvirtualObjectMethod, 3539 jni_CallNonvirtualObjectMethodV, 3540 jni_CallNonvirtualObjectMethodA, 3541 jni_CallNonvirtualBooleanMethod, 3542 jni_CallNonvirtualBooleanMethodV, 3543 jni_CallNonvirtualBooleanMethodA, 3544 jni_CallNonvirtualByteMethod, 3545 jni_CallNonvirtualByteMethodV, 3546 jni_CallNonvirtualByteMethodA, 3547 jni_CallNonvirtualCharMethod, 3548 jni_CallNonvirtualCharMethodV, 3549 jni_CallNonvirtualCharMethodA, 3550 jni_CallNonvirtualShortMethod, 3551 jni_CallNonvirtualShortMethodV, 3552 jni_CallNonvirtualShortMethodA, 3553 jni_CallNonvirtualIntMethod, 3554 jni_CallNonvirtualIntMethodV, 3555 jni_CallNonvirtualIntMethodA, 3556 jni_CallNonvirtualLongMethod, 3557 jni_CallNonvirtualLongMethodV, 3558 jni_CallNonvirtualLongMethodA, 3559 jni_CallNonvirtualFloatMethod, 3560 jni_CallNonvirtualFloatMethodV, 3561 jni_CallNonvirtualFloatMethodA, 3562 jni_CallNonvirtualDoubleMethod, 3563 jni_CallNonvirtualDoubleMethodV, 3564 jni_CallNonvirtualDoubleMethodA, 3565 jni_CallNonvirtualVoidMethod, 3566 jni_CallNonvirtualVoidMethodV, 3567 jni_CallNonvirtualVoidMethodA, 3568 3569 jni_GetFieldID, 3570 3571 jni_GetObjectField, 3572 jni_GetBooleanField, 3573 jni_GetByteField, 3574 jni_GetCharField, 3575 jni_GetShortField, 3576 jni_GetIntField, 3577 jni_GetLongField, 3578 jni_GetFloatField, 3579 jni_GetDoubleField, 3580 3581 jni_SetObjectField, 3582 jni_SetBooleanField, 3583 jni_SetByteField, 3584 jni_SetCharField, 3585 jni_SetShortField, 3586 jni_SetIntField, 3587 jni_SetLongField, 3588 jni_SetFloatField, 3589 jni_SetDoubleField, 3590 3591 jni_GetStaticMethodID, 3592 3593 jni_CallStaticObjectMethod, 3594 jni_CallStaticObjectMethodV, 3595 jni_CallStaticObjectMethodA, 3596 jni_CallStaticBooleanMethod, 3597 jni_CallStaticBooleanMethodV, 3598 jni_CallStaticBooleanMethodA, 3599 jni_CallStaticByteMethod, 3600 jni_CallStaticByteMethodV, 3601 jni_CallStaticByteMethodA, 3602 jni_CallStaticCharMethod, 3603 jni_CallStaticCharMethodV, 3604 jni_CallStaticCharMethodA, 3605 jni_CallStaticShortMethod, 3606 jni_CallStaticShortMethodV, 3607 jni_CallStaticShortMethodA, 3608 jni_CallStaticIntMethod, 3609 jni_CallStaticIntMethodV, 3610 jni_CallStaticIntMethodA, 3611 jni_CallStaticLongMethod, 3612 jni_CallStaticLongMethodV, 3613 jni_CallStaticLongMethodA, 3614 jni_CallStaticFloatMethod, 3615 jni_CallStaticFloatMethodV, 3616 jni_CallStaticFloatMethodA, 3617 jni_CallStaticDoubleMethod, 3618 jni_CallStaticDoubleMethodV, 3619 jni_CallStaticDoubleMethodA, 3620 jni_CallStaticVoidMethod, 3621 jni_CallStaticVoidMethodV, 3622 jni_CallStaticVoidMethodA, 3623 3624 jni_GetStaticFieldID, 3625 3626 jni_GetStaticObjectField, 3627 jni_GetStaticBooleanField, 3628 jni_GetStaticByteField, 3629 jni_GetStaticCharField, 3630 jni_GetStaticShortField, 3631 jni_GetStaticIntField, 3632 jni_GetStaticLongField, 3633 jni_GetStaticFloatField, 3634 jni_GetStaticDoubleField, 3635 3636 jni_SetStaticObjectField, 3637 jni_SetStaticBooleanField, 3638 jni_SetStaticByteField, 3639 jni_SetStaticCharField, 3640 jni_SetStaticShortField, 3641 jni_SetStaticIntField, 3642 jni_SetStaticLongField, 3643 jni_SetStaticFloatField, 3644 jni_SetStaticDoubleField, 3645 3646 jni_NewString, 3647 jni_GetStringLength, 3648 jni_GetStringChars, 3649 jni_ReleaseStringChars, 3650 3651 jni_NewStringUTF, 3652 jni_GetStringUTFLength, 3653 jni_GetStringUTFChars, 3654 jni_ReleaseStringUTFChars, 3655 3656 jni_GetArrayLength, 3657 3658 jni_NewObjectArray, 3659 jni_GetObjectArrayElement, 3660 jni_SetObjectArrayElement, 3661 3662 jni_NewBooleanArray, 3663 jni_NewByteArray, 3664 jni_NewCharArray, 3665 jni_NewShortArray, 3666 jni_NewIntArray, 3667 jni_NewLongArray, 3668 jni_NewFloatArray, 3669 jni_NewDoubleArray, 3670 3671 jni_GetBooleanArrayElements, 3672 jni_GetByteArrayElements, 3673 jni_GetCharArrayElements, 3674 jni_GetShortArrayElements, 3675 jni_GetIntArrayElements, 3676 jni_GetLongArrayElements, 3677 jni_GetFloatArrayElements, 3678 jni_GetDoubleArrayElements, 3679 3680 jni_ReleaseBooleanArrayElements, 3681 jni_ReleaseByteArrayElements, 3682 jni_ReleaseCharArrayElements, 3683 jni_ReleaseShortArrayElements, 3684 jni_ReleaseIntArrayElements, 3685 jni_ReleaseLongArrayElements, 3686 jni_ReleaseFloatArrayElements, 3687 jni_ReleaseDoubleArrayElements, 3688 3689 jni_GetBooleanArrayRegion, 3690 jni_GetByteArrayRegion, 3691 jni_GetCharArrayRegion, 3692 jni_GetShortArrayRegion, 3693 jni_GetIntArrayRegion, 3694 jni_GetLongArrayRegion, 3695 jni_GetFloatArrayRegion, 3696 jni_GetDoubleArrayRegion, 3697 3698 jni_SetBooleanArrayRegion, 3699 jni_SetByteArrayRegion, 3700 jni_SetCharArrayRegion, 3701 jni_SetShortArrayRegion, 3702 jni_SetIntArrayRegion, 3703 jni_SetLongArrayRegion, 3704 jni_SetFloatArrayRegion, 3705 jni_SetDoubleArrayRegion, 3706 3707 jni_RegisterNatives, 3708 jni_UnregisterNatives, 3709 3710 jni_MonitorEnter, 3711 jni_MonitorExit, 3712 3713 jni_GetJavaVM, 3714 3715 jni_GetStringRegion, 3716 jni_GetStringUTFRegion, 3717 3718 jni_GetPrimitiveArrayCritical, 3719 jni_ReleasePrimitiveArrayCritical, 3720 3721 jni_GetStringCritical, 3722 jni_ReleaseStringCritical, 3723 3724 jni_NewWeakGlobalRef, 3725 jni_DeleteWeakGlobalRef, 3726 3727 jni_ExceptionCheck, 3728 3729 jni_NewDirectByteBuffer, 3730 jni_GetDirectBufferAddress, 3731 jni_GetDirectBufferCapacity, 3732 3733 // New 1_6 features 3734 3735 jni_GetObjectRefType 3736}; 3737 3738 3739// For jvmti use to modify jni function table. 3740// Java threads in native contiues to run until it is transitioned 3741// to VM at safepoint. Before the transition or before it is blocked 3742// for safepoint it may access jni function table. VM could crash if 3743// any java thread access the jni function table in the middle of memcpy. 3744// To avoid this each function pointers are copied automically. 3745void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3746 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3747 intptr_t *a = (intptr_t *) jni_functions(); 3748 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3749 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3750 Atomic::store_ptr(*b++, a++); 3751 } 3752} 3753 3754void quicken_jni_functions() { 3755 // Replace Get<Primitive>Field with fast versions 3756 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3757 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls 3758#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3759 // windows x86 currently needs SEH wrapper and the gain of the fast 3760 // versions currently isn't certain for server vm on uniprocessor. 3761 && os::is_MP() 3762#endif 3763 ) { 3764 address func; 3765 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3766 if (func != (address)-1) { 3767 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3768 } 3769 func = JNI_FastGetField::generate_fast_get_byte_field(); 3770 if (func != (address)-1) { 3771 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3772 } 3773 func = JNI_FastGetField::generate_fast_get_char_field(); 3774 if (func != (address)-1) { 3775 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3776 } 3777 func = JNI_FastGetField::generate_fast_get_short_field(); 3778 if (func != (address)-1) { 3779 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3780 } 3781 func = JNI_FastGetField::generate_fast_get_int_field(); 3782 if (func != (address)-1) { 3783 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3784 } 3785 func = JNI_FastGetField::generate_fast_get_long_field(); 3786 if (func != (address)-1) { 3787 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3788 } 3789 func = JNI_FastGetField::generate_fast_get_float_field(); 3790 if (func != (address)-1) { 3791 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3792 } 3793 func = JNI_FastGetField::generate_fast_get_double_field(); 3794 if (func != (address)-1) { 3795 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3796 } 3797 } 3798} 3799 3800// Returns the function structure 3801struct JNINativeInterface_* jni_functions() { 3802#if INCLUDE_JNI_CHECK 3803 if (CheckJNICalls) return jni_functions_check(); 3804#endif // INCLUDE_JNI_CHECK 3805 return &jni_NativeInterface; 3806} 3807 3808// Returns the function structure 3809struct JNINativeInterface_* jni_functions_nocheck() { 3810 return &jni_NativeInterface; 3811} 3812 3813 3814// Invocation API 3815 3816 3817// Forward declaration 3818extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3819 3820// Global invocation API vars 3821volatile jint vm_created = 0; 3822// Indicate whether it is safe to recreate VM 3823volatile jint safe_to_recreate_vm = 1; 3824struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3825 3826 3827#define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3828enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3829 3830DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3831 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3832 3833_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3834 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3835 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3836 jint ret = JNI_ERR; 3837 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3838 3839 if (Threads::is_supported_jni_version(args->version)) { 3840 ret = JNI_OK; 3841 } 3842 // 1.1 style no longer supported in hotspot. 3843 // According the JNI spec, we should update args->version on return. 3844 // We also use the structure to communicate with launcher about default 3845 // stack size. 3846 if (args->version == JNI_VERSION_1_1) { 3847 args->version = JNI_VERSION_1_2; 3848 // javaStackSize is int in arguments structure 3849 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3850 args->javaStackSize = (jint)(ThreadStackSize * K); 3851 } 3852 return ret; 3853} 3854 3855#ifndef PRODUCT 3856 3857#include "gc_implementation/shared/gcTimer.hpp" 3858#include "gc_interface/collectedHeap.hpp" 3859#if INCLUDE_ALL_GCS 3860#include "gc_implementation/g1/heapRegionRemSet.hpp" 3861#endif 3862#include "utilities/quickSort.hpp" 3863#include "utilities/ostream.hpp" 3864#if INCLUDE_VM_STRUCTS 3865#include "runtime/vmStructs.hpp" 3866#endif 3867 3868#define run_unit_test(unit_test_function_call) \ 3869 tty->print_cr("Running test: " #unit_test_function_call); \ 3870 unit_test_function_call 3871 3872// Forward declaration 3873void TestReservedSpace_test(); 3874void TestReserveMemorySpecial_test(); 3875void TestVirtualSpace_test(); 3876void TestMetaspaceAux_test(); 3877void TestMetachunk_test(); 3878void TestVirtualSpaceNode_test(); 3879void TestNewSize_test(); 3880void TestKlass_test(); 3881#if INCLUDE_ALL_GCS 3882void TestOldFreeSpaceCalculation_test(); 3883void TestG1BiasedArray_test(); 3884void TestBufferingOopClosure_test(); 3885void TestCodeCacheRemSet_test(); 3886#endif 3887 3888void execute_internal_vm_tests() { 3889 if (ExecuteInternalVMTests) { 3890 tty->print_cr("Running internal VM tests"); 3891 run_unit_test(TestReservedSpace_test()); 3892 run_unit_test(TestReserveMemorySpecial_test()); 3893 run_unit_test(TestVirtualSpace_test()); 3894 run_unit_test(TestMetaspaceAux_test()); 3895 run_unit_test(TestMetachunk_test()); 3896 run_unit_test(TestVirtualSpaceNode_test()); 3897 run_unit_test(GlobalDefinitions::test_globals()); 3898 run_unit_test(GCTimerAllTest::all()); 3899 run_unit_test(arrayOopDesc::test_max_array_length()); 3900 run_unit_test(CollectedHeap::test_is_in()); 3901 run_unit_test(QuickSort::test_quick_sort()); 3902 run_unit_test(AltHashing::test_alt_hash()); 3903 run_unit_test(test_loggc_filename()); 3904 run_unit_test(TestNewSize_test()); 3905 run_unit_test(TestKlass_test()); 3906#if INCLUDE_VM_STRUCTS 3907 run_unit_test(VMStructs::test()); 3908#endif 3909#if INCLUDE_ALL_GCS 3910 run_unit_test(TestOldFreeSpaceCalculation_test()); 3911 run_unit_test(TestG1BiasedArray_test()); 3912 run_unit_test(HeapRegionRemSet::test_prt()); 3913 run_unit_test(TestBufferingOopClosure_test()); 3914 run_unit_test(TestCodeCacheRemSet_test()); 3915#endif 3916 tty->print_cr("All internal VM tests passed"); 3917 } 3918} 3919 3920#undef run_unit_test 3921 3922#endif 3923 3924DT_RETURN_MARK_DECL(CreateJavaVM, jint 3925 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3926 3927_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3928 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3929 3930 jint result = JNI_ERR; 3931 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3932 3933 // We're about to use Atomic::xchg for synchronization. Some Zero 3934 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3935 // but __sync_lock_test_and_set is not guaranteed to do what we want 3936 // on all architectures. So we check it works before relying on it. 3937#if defined(ZERO) && defined(ASSERT) 3938 { 3939 jint a = 0xcafebabe; 3940 jint b = Atomic::xchg(0xdeadbeef, &a); 3941 void *c = &a; 3942 void *d = Atomic::xchg_ptr(&b, &c); 3943 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3944 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3945 } 3946#endif // ZERO && ASSERT 3947 3948 // At the moment it's only possible to have one Java VM, 3949 // since some of the runtime state is in global variables. 3950 3951 // We cannot use our mutex locks here, since they only work on 3952 // Threads. We do an atomic compare and exchange to ensure only 3953 // one thread can call this method at a time 3954 3955 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3956 // the add/dec implementations are dependent on whether we are running 3957 // on a multiprocessor, and at this stage of initialization the os::is_MP 3958 // function used to determine this will always return false. Atomic::xchg 3959 // does not have this problem. 3960 if (Atomic::xchg(1, &vm_created) == 1) { 3961 return JNI_EEXIST; // already created, or create attempt in progress 3962 } 3963 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3964 return JNI_ERR; // someone tried and failed and retry not allowed. 3965 } 3966 3967 assert(vm_created == 1, "vm_created is true during the creation"); 3968 3969 /** 3970 * Certain errors during initialization are recoverable and do not 3971 * prevent this method from being called again at a later time 3972 * (perhaps with different arguments). However, at a certain 3973 * point during initialization if an error occurs we cannot allow 3974 * this function to be called again (or it will crash). In those 3975 * situations, the 'canTryAgain' flag is set to false, which atomically 3976 * sets safe_to_recreate_vm to 1, such that any new call to 3977 * JNI_CreateJavaVM will immediately fail using the above logic. 3978 */ 3979 bool can_try_again = true; 3980 3981 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3982 if (result == JNI_OK) { 3983 JavaThread *thread = JavaThread::current(); 3984 assert(!thread->has_pending_exception(), "should have returned not OK"); 3985 /* thread is thread_in_vm here */ 3986 *vm = (JavaVM *)(&main_vm); 3987 *(JNIEnv**)penv = thread->jni_environment(); 3988 3989 // Tracks the time application was running before GC 3990 RuntimeService::record_application_start(); 3991 3992 // Notify JVMTI 3993 if (JvmtiExport::should_post_thread_life()) { 3994 JvmtiExport::post_thread_start(thread); 3995 } 3996 3997 EventThreadStart event; 3998 if (event.should_commit()) { 3999 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4000 event.commit(); 4001 } 4002 4003#ifndef PRODUCT 4004 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED 4005 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f() 4006 #endif 4007 4008 // Check if we should compile all classes on bootclasspath 4009 if (CompileTheWorld) ClassLoader::compile_the_world(); 4010 if (ReplayCompiles) ciReplay::replay(thread); 4011 4012 // Some platforms (like Win*) need a wrapper around these test 4013 // functions in order to properly handle error conditions. 4014 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler); 4015 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests); 4016#endif 4017 4018 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4019 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4020 } else { 4021 // If create_vm exits because of a pending exception, exit with that 4022 // exception. In the future when we figure out how to reclaim memory, 4023 // we may be able to exit with JNI_ERR and allow the calling application 4024 // to continue. 4025 if (Universe::is_fully_initialized()) { 4026 // otherwise no pending exception possible - VM will already have aborted 4027 JavaThread* THREAD = JavaThread::current(); 4028 if (HAS_PENDING_EXCEPTION) { 4029 HandleMark hm; 4030 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4031 } 4032 } 4033 4034 if (can_try_again) { 4035 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4036 safe_to_recreate_vm = 1; 4037 } 4038 4039 // Creation failed. We must reset vm_created 4040 *vm = 0; 4041 *(JNIEnv**)penv = 0; 4042 // reset vm_created last to avoid race condition. Use OrderAccess to 4043 // control both compiler and architectural-based reordering. 4044 OrderAccess::release_store(&vm_created, 0); 4045 } 4046 4047 return result; 4048} 4049 4050 4051_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4052 // See bug 4367188, the wrapper can sometimes cause VM crashes 4053 // JNIWrapper("GetCreatedJavaVMs"); 4054 4055 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4056 4057 if (vm_created) { 4058 if (numVMs != NULL) *numVMs = 1; 4059 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4060 } else { 4061 if (numVMs != NULL) *numVMs = 0; 4062 } 4063 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4064 return JNI_OK; 4065} 4066 4067extern "C" { 4068 4069DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4070 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4071 4072jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4073 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4074 jint res = JNI_ERR; 4075 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4076 4077 if (!vm_created) { 4078 res = JNI_ERR; 4079 return res; 4080 } 4081 4082 JNIWrapper("DestroyJavaVM"); 4083 JNIEnv *env; 4084 JavaVMAttachArgs destroyargs; 4085 destroyargs.version = CurrentVersion; 4086 destroyargs.name = (char *)"DestroyJavaVM"; 4087 destroyargs.group = NULL; 4088 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4089 if (res != JNI_OK) { 4090 return res; 4091 } 4092 4093 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4094 JavaThread* thread = JavaThread::current(); 4095 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4096 if (Threads::destroy_vm()) { 4097 // Should not change thread state, VM is gone 4098 vm_created = false; 4099 res = JNI_OK; 4100 return res; 4101 } else { 4102 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4103 res = JNI_ERR; 4104 return res; 4105 } 4106} 4107 4108 4109static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4110 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4111 4112 // Check below commented out from JDK1.2fcs as well 4113 /* 4114 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4115 return JNI_EVERSION; 4116 } 4117 */ 4118 4119 Thread* t = ThreadLocalStorage::get_thread_slow(); 4120 if (t != NULL) { 4121 // If the thread has been attached this operation is a no-op 4122 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4123 return JNI_OK; 4124 } 4125 4126 // Create a thread and mark it as attaching so it will be skipped by the 4127 // ThreadsListEnumerator - see CR 6404306 4128 JavaThread* thread = new JavaThread(true); 4129 4130 // Set correct safepoint info. The thread is going to call into Java when 4131 // initializing the Java level thread object. Hence, the correct state must 4132 // be set in order for the Safepoint code to deal with it correctly. 4133 thread->set_thread_state(_thread_in_vm); 4134 // Must do this before initialize_thread_local_storage 4135 thread->record_stack_base_and_size(); 4136 4137 thread->initialize_thread_local_storage(); 4138 4139 if (!os::create_attached_thread(thread)) { 4140 delete thread; 4141 return JNI_ERR; 4142 } 4143 // Enable stack overflow checks 4144 thread->create_stack_guard_pages(); 4145 4146 thread->initialize_tlab(); 4147 4148 thread->cache_global_variables(); 4149 4150 // Crucial that we do not have a safepoint check for this thread, since it has 4151 // not been added to the Thread list yet. 4152 { Threads_lock->lock_without_safepoint_check(); 4153 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4154 // avoid this thread trying to do a GC before it is added to the thread-list 4155 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4156 Threads::add(thread, daemon); 4157 Threads_lock->unlock(); 4158 } 4159 // Create thread group and name info from attach arguments 4160 oop group = NULL; 4161 char* thread_name = NULL; 4162 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4163 group = JNIHandles::resolve(args->group); 4164 thread_name = args->name; // may be NULL 4165 } 4166 if (group == NULL) group = Universe::main_thread_group(); 4167 4168 // Create Java level thread object and attach it to this thread 4169 bool attach_failed = false; 4170 { 4171 EXCEPTION_MARK; 4172 HandleMark hm(THREAD); 4173 Handle thread_group(THREAD, group); 4174 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4175 if (HAS_PENDING_EXCEPTION) { 4176 CLEAR_PENDING_EXCEPTION; 4177 // cleanup outside the handle mark. 4178 attach_failed = true; 4179 } 4180 } 4181 4182 if (attach_failed) { 4183 // Added missing cleanup 4184 thread->cleanup_failed_attach_current_thread(); 4185 return JNI_ERR; 4186 } 4187 4188 // mark the thread as no longer attaching 4189 // this uses a fence to push the change through so we don't have 4190 // to regrab the threads_lock 4191 thread->set_done_attaching_via_jni(); 4192 4193 // Set java thread status. 4194 java_lang_Thread::set_thread_status(thread->threadObj(), 4195 java_lang_Thread::RUNNABLE); 4196 4197 // Notify the debugger 4198 if (JvmtiExport::should_post_thread_life()) { 4199 JvmtiExport::post_thread_start(thread); 4200 } 4201 4202 EventThreadStart event; 4203 if (event.should_commit()) { 4204 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4205 event.commit(); 4206 } 4207 4208 *(JNIEnv**)penv = thread->jni_environment(); 4209 4210 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4211 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4212 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4213 // needed. 4214 4215 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4216 4217 // Perform any platform dependent FPU setup 4218 os::setup_fpu(); 4219 4220 return JNI_OK; 4221} 4222 4223 4224jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4225 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4226 if (!vm_created) { 4227 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4228 return JNI_ERR; 4229 } 4230 4231 JNIWrapper("AttachCurrentThread"); 4232 jint ret = attach_current_thread(vm, penv, _args, false); 4233 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4234 return ret; 4235} 4236 4237 4238jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4239 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4240 VM_Exit::block_if_vm_exited(); 4241 4242 JNIWrapper("DetachCurrentThread"); 4243 4244 // If the thread has been deattacted the operations is a no-op 4245 if (ThreadLocalStorage::thread() == NULL) { 4246 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4247 return JNI_OK; 4248 } 4249 4250 JavaThread* thread = JavaThread::current(); 4251 if (thread->has_last_Java_frame()) { 4252 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4253 // Can't detach a thread that's running java, that can't work. 4254 return JNI_ERR; 4255 } 4256 4257 // Safepoint support. Have to do call-back to safepoint code, if in the 4258 // middel of a safepoint operation 4259 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4260 4261 // XXX: Note that JavaThread::exit() call below removes the guards on the 4262 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4263 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4264 // of the guards is visible in jni_AttachCurrentThread above, 4265 // the removal of the guards is buried below in JavaThread::exit() 4266 // here. The abstraction should be more symmetrically either exposed 4267 // or hidden (e.g. it could probably be hidden in the same 4268 // (platform-dependent) methods where we do alternate stack 4269 // maintenance work?) 4270 thread->exit(false, JavaThread::jni_detach); 4271 delete thread; 4272 4273 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4274 return JNI_OK; 4275} 4276 4277DT_RETURN_MARK_DECL(GetEnv, jint 4278 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4279 4280jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4281 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4282 jint ret = JNI_ERR; 4283 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4284 4285 if (!vm_created) { 4286 *penv = NULL; 4287 ret = JNI_EDETACHED; 4288 return ret; 4289 } 4290 4291 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4292 return ret; 4293 } 4294 4295#ifndef JVMPI_VERSION_1 4296// need these in order to be polite about older agents 4297#define JVMPI_VERSION_1 ((jint)0x10000001) 4298#define JVMPI_VERSION_1_1 ((jint)0x10000002) 4299#define JVMPI_VERSION_1_2 ((jint)0x10000003) 4300#endif // !JVMPI_VERSION_1 4301 4302 Thread* thread = ThreadLocalStorage::thread(); 4303 if (thread != NULL && thread->is_Java_thread()) { 4304 if (Threads::is_supported_jni_version_including_1_1(version)) { 4305 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4306 ret = JNI_OK; 4307 return ret; 4308 4309 } else if (version == JVMPI_VERSION_1 || 4310 version == JVMPI_VERSION_1_1 || 4311 version == JVMPI_VERSION_1_2) { 4312 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4313 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4314 ret = JNI_EVERSION; 4315 return ret; 4316 } else if (JvmtiExport::is_jvmdi_version(version)) { 4317 tty->print_cr("FATAL ERROR: JVMDI 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 { 4322 *penv = NULL; 4323 ret = JNI_EVERSION; 4324 return ret; 4325 } 4326 } else { 4327 *penv = NULL; 4328 ret = JNI_EDETACHED; 4329 return ret; 4330 } 4331} 4332 4333 4334jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4335 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4336 if (!vm_created) { 4337 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4338 return JNI_ERR; 4339 } 4340 4341 JNIWrapper("AttachCurrentThreadAsDaemon"); 4342 jint ret = attach_current_thread(vm, penv, _args, true); 4343 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4344 return ret; 4345} 4346 4347 4348} // End extern "C" 4349 4350const struct JNIInvokeInterface_ jni_InvokeInterface = { 4351 NULL, 4352 NULL, 4353 NULL, 4354 4355 jni_DestroyJavaVM, 4356 jni_AttachCurrentThread, 4357 jni_DetachCurrentThread, 4358 jni_GetEnv, 4359 jni_AttachCurrentThreadAsDaemon 4360}; 4361