jni.cpp revision 7331:110ec5963eb1
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#include "precompiled.hpp" 27#include "ci/ciReplay.hpp" 28#include "classfile/altHashing.hpp" 29#include "classfile/classLoader.hpp" 30#include "classfile/javaClasses.hpp" 31#include "classfile/symbolTable.hpp" 32#include "classfile/systemDictionary.hpp" 33#include "classfile/vmSymbols.hpp" 34#include "interpreter/linkResolver.hpp" 35#include "utilities/macros.hpp" 36#if INCLUDE_ALL_GCS 37#include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" 38#endif // INCLUDE_ALL_GCS 39#include "memory/allocation.hpp" 40#include "memory/allocation.inline.hpp" 41#include "memory/gcLocker.inline.hpp" 42#include "memory/oopFactory.hpp" 43#include "memory/universe.inline.hpp" 44#include "oops/instanceKlass.hpp" 45#include "oops/instanceOop.hpp" 46#include "oops/markOop.hpp" 47#include "oops/method.hpp" 48#include "oops/objArrayKlass.hpp" 49#include "oops/objArrayOop.hpp" 50#include "oops/oop.inline.hpp" 51#include "oops/symbol.hpp" 52#include "oops/typeArrayKlass.hpp" 53#include "oops/typeArrayOop.hpp" 54#include "prims/jni.h" 55#include "prims/jniCheck.hpp" 56#include "prims/jniExport.hpp" 57#include "prims/jniFastGetField.hpp" 58#include "prims/jvm.h" 59#include "prims/jvm_misc.hpp" 60#include "prims/jvmtiExport.hpp" 61#include "prims/jvmtiThreadState.hpp" 62#include "runtime/atomic.inline.hpp" 63#include "runtime/compilationPolicy.hpp" 64#include "runtime/fieldDescriptor.hpp" 65#include "runtime/fprofiler.hpp" 66#include "runtime/handles.inline.hpp" 67#include "runtime/interfaceSupport.hpp" 68#include "runtime/java.hpp" 69#include "runtime/javaCalls.hpp" 70#include "runtime/jfieldIDWorkaround.hpp" 71#include "runtime/orderAccess.inline.hpp" 72#include "runtime/reflection.hpp" 73#include "runtime/sharedRuntime.hpp" 74#include "runtime/signature.hpp" 75#include "runtime/thread.inline.hpp" 76#include "runtime/vm_operations.hpp" 77#include "services/memTracker.hpp" 78#include "services/runtimeService.hpp" 79#include "trace/tracing.hpp" 80#include "utilities/defaultStream.hpp" 81#include "utilities/dtrace.hpp" 82#include "utilities/events.hpp" 83#include "utilities/histogram.hpp" 84 85static jint CurrentVersion = JNI_VERSION_1_8; 86 87 88// The DT_RETURN_MARK macros create a scoped object to fire the dtrace 89// '-return' probe regardless of the return path is taken out of the function. 90// Methods that have multiple return paths use this to avoid having to 91// instrument each return path. Methods that use CHECK or THROW must use this 92// since those macros can cause an immedate uninstrumented return. 93// 94// In order to get the return value, a reference to the variable containing 95// the return value must be passed to the contructor of the object, and 96// the return value must be set before return (since the mark object has 97// a reference to it). 98// 99// Example: 100// DT_RETURN_MARK_DECL(SomeFunc, int); 101// JNI_ENTRY(int, SomeFunc, ...) 102// int return_value = 0; 103// DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 104// foo(CHECK_0) 105// return_value = 5; 106// return return_value; 107// JNI_END 108#define DT_RETURN_MARK_DECL(name, type, probe) \ 109 DTRACE_ONLY( \ 110 class DTraceReturnProbeMark_##name { \ 111 public: \ 112 const type& _ret_ref; \ 113 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 114 ~DTraceReturnProbeMark_##name() { \ 115 probe; \ 116 } \ 117 } \ 118 ) 119// Void functions are simpler since there's no return value 120#define DT_VOID_RETURN_MARK_DECL(name, probe) \ 121 DTRACE_ONLY( \ 122 class DTraceReturnProbeMark_##name { \ 123 public: \ 124 ~DTraceReturnProbeMark_##name() { \ 125 probe; \ 126 } \ 127 } \ 128 ) 129 130// Place these macros in the function to mark the return. Non-void 131// functions need the type and address of the return value. 132#define DT_RETURN_MARK(name, type, ref) \ 133 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 134#define DT_VOID_RETURN_MARK(name) \ 135 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 136 137 138// Use these to select distinct code for floating-point vs. non-floating point 139// situations. Used from within common macros where we need slightly 140// different behavior for Float/Double 141#define FP_SELECT_Boolean(intcode, fpcode) intcode 142#define FP_SELECT_Byte(intcode, fpcode) intcode 143#define FP_SELECT_Char(intcode, fpcode) intcode 144#define FP_SELECT_Short(intcode, fpcode) intcode 145#define FP_SELECT_Object(intcode, fpcode) intcode 146#define FP_SELECT_Int(intcode, fpcode) intcode 147#define FP_SELECT_Long(intcode, fpcode) intcode 148#define FP_SELECT_Float(intcode, fpcode) fpcode 149#define FP_SELECT_Double(intcode, fpcode) fpcode 150#define FP_SELECT(TypeName, intcode, fpcode) \ 151 FP_SELECT_##TypeName(intcode, fpcode) 152 153#define COMMA , 154 155// Choose DT_RETURN_MARK macros based on the type: float/double -> void 156// (dtrace doesn't do FP yet) 157#define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 158 FP_SELECT(TypeName, \ 159 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 160#define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 161 FP_SELECT(TypeName, \ 162 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 163 164 165// out-of-line helpers for class jfieldIDWorkaround: 166 167bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 168 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 169 uintptr_t as_uint = (uintptr_t) id; 170 intptr_t offset = raw_instance_offset(id); 171 if (is_checked_jfieldID(id)) { 172 if (!klass_hash_ok(k, id)) { 173 return false; 174 } 175 } 176 return InstanceKlass::cast(k)->contains_field_offset(offset); 177 } else { 178 JNIid* result = (JNIid*) id; 179#ifdef ASSERT 180 return result != NULL && result->is_static_field_id(); 181#else 182 return result != NULL; 183#endif 184 } 185} 186 187 188intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 189 if (offset <= small_offset_mask) { 190 Klass* field_klass = k; 191 Klass* super_klass = field_klass->super(); 192 // With compressed oops the most super class with nonstatic fields would 193 // be the owner of fields embedded in the header. 194 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 195 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 196 field_klass = super_klass; // super contains the field also 197 super_klass = field_klass->super(); 198 } 199 debug_only(No_Safepoint_Verifier nosafepoint;) 200 uintptr_t klass_hash = field_klass->identity_hash(); 201 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 202 } else { 203#if 0 204 #ifndef PRODUCT 205 { 206 ResourceMark rm; 207 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 208 } 209 #endif 210#endif 211 return 0; 212 } 213} 214 215bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 216 uintptr_t as_uint = (uintptr_t) id; 217 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 218 do { 219 debug_only(No_Safepoint_Verifier nosafepoint;) 220 // Could use a non-blocking query for identity_hash here... 221 if ((k->identity_hash() & klass_mask) == klass_hash) 222 return true; 223 k = k->super(); 224 } while (k != NULL); 225 return false; 226} 227 228void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 229 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 230 uintptr_t as_uint = (uintptr_t) id; 231 intptr_t offset = raw_instance_offset(id); 232 if (VerifyJNIFields) { 233 if (is_checked_jfieldID(id)) { 234 guarantee(klass_hash_ok(k, id), 235 "Bug in native code: jfieldID class must match object"); 236 } else { 237#if 0 238 #ifndef PRODUCT 239 if (Verbose) { 240 ResourceMark rm; 241 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 242 } 243 #endif 244#endif 245 } 246 } 247 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 248 "Bug in native code: jfieldID offset must address interior of object"); 249} 250 251// Wrapper to trace JNI functions 252 253#ifdef ASSERT 254 Histogram* JNIHistogram; 255 static volatile jint JNIHistogram_lock = 0; 256 257 class JNITraceWrapper : public StackObj { 258 public: 259 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { 260 if (TraceJNICalls) { 261 va_list ap; 262 va_start(ap, format); 263 tty->print("JNI "); 264 tty->vprint_cr(format, ap); 265 va_end(ap); 266 } 267 } 268 }; 269 270 class JNIHistogramElement : public HistogramElement { 271 public: 272 JNIHistogramElement(const char* name); 273 }; 274 275 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 276 _name = elementName; 277 uintx count = 0; 278 279 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 280 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 281 count +=1; 282 if ( (WarnOnStalledSpinLock > 0) 283 && (count % WarnOnStalledSpinLock == 0)) { 284 warning("JNIHistogram_lock seems to be stalled"); 285 } 286 } 287 } 288 289 290 if(JNIHistogram == NULL) 291 JNIHistogram = new Histogram("JNI Call Counts",100); 292 293 JNIHistogram->add_element(this); 294 Atomic::dec(&JNIHistogram_lock); 295 } 296 297 #define JNICountWrapper(arg) \ 298 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 299 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 300 if (e != NULL) e->increment_count() 301 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) 302#else 303 #define JNIWrapper(arg) 304#endif 305 306 307// Implementation of JNI entries 308 309DT_RETURN_MARK_DECL(DefineClass, jclass 310 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 311 312JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 313 const jbyte *buf, jsize bufLen)) 314 JNIWrapper("DefineClass"); 315 316 HOTSPOT_JNI_DEFINECLASS_ENTRY( 317 env, (char*) name, loaderRef, (char*) buf, bufLen); 318 319 jclass cls = NULL; 320 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 321 322 TempNewSymbol class_name = NULL; 323 // Since exceptions can be thrown, class initialization can take place 324 // if name is NULL no check for class name in .class stream has to be made. 325 if (name != NULL) { 326 const int str_len = (int)strlen(name); 327 if (str_len > Symbol::max_length()) { 328 // It's impossible to create this class; the name cannot fit 329 // into the constant pool. 330 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 331 } 332 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 333 } 334 ResourceMark rm(THREAD); 335 ClassFileStream st((u1*) buf, bufLen, NULL); 336 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 337 338 if (UsePerfData && !class_loader.is_null()) { 339 // check whether the current caller thread holds the lock or not. 340 // If not, increment the corresponding counter 341 if (ObjectSynchronizer:: 342 query_lock_ownership((JavaThread*)THREAD, class_loader) != 343 ObjectSynchronizer::owner_self) { 344 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 345 } 346 } 347 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 348 Handle(), &st, true, 349 CHECK_NULL); 350 351 if (TraceClassResolution && k != NULL) { 352 trace_class_resolution(k); 353 } 354 355 cls = (jclass)JNIHandles::make_local( 356 env, k->java_mirror()); 357 return cls; 358JNI_END 359 360 361 362static bool first_time_FindClass = true; 363 364DT_RETURN_MARK_DECL(FindClass, jclass 365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 366 367JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 368 JNIWrapper("FindClass"); 369 370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 371 372 jclass result = NULL; 373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 374 375 // Remember if we are the first invocation of jni_FindClass 376 bool first_time = first_time_FindClass; 377 first_time_FindClass = false; 378 379 // Sanity check the name: it cannot be null or larger than the maximum size 380 // name we can fit in the constant pool. 381 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 383 } 384 385 //%note jni_3 386 Handle loader; 387 Handle protection_domain; 388 // Find calling class 389 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 390 if (k.not_null()) { 391 loader = Handle(THREAD, k->class_loader()); 392 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 393 // in the correct class context. 394 if (loader.is_null() && 395 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 396 JavaValue result(T_OBJECT); 397 JavaCalls::call_static(&result, k, 398 vmSymbols::getFromClass_name(), 399 vmSymbols::void_class_signature(), 400 thread); 401 if (HAS_PENDING_EXCEPTION) { 402 Handle ex(thread, thread->pending_exception()); 403 CLEAR_PENDING_EXCEPTION; 404 THROW_HANDLE_0(ex); 405 } 406 oop mirror = (oop) result.get_jobject(); 407 loader = Handle(THREAD, 408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 409 protection_domain = Handle(THREAD, 410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 411 } 412 } else { 413 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 414 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 415 } 416 417 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 418 result = find_class_from_class_loader(env, sym, true, loader, 419 protection_domain, true, thread); 420 421 if (TraceClassResolution && result != NULL) { 422 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 423 } 424 425 // If we were the first invocation of jni_FindClass, we enable compilation again 426 // rather than just allowing invocation counter to overflow and decay. 427 // Controlled by flag DelayCompilationDuringStartup. 428 if (first_time && !CompileTheWorld) 429 CompilationPolicy::completed_vm_startup(); 430 431 return result; 432JNI_END 433 434DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 436 437JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 438 JNIWrapper("FromReflectedMethod"); 439 440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 441 442 jmethodID ret = NULL; 443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 444 445 // method is a handle to a java.lang.reflect.Method object 446 oop reflected = JNIHandles::resolve_non_null(method); 447 oop mirror = NULL; 448 int slot = 0; 449 450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 451 mirror = java_lang_reflect_Constructor::clazz(reflected); 452 slot = java_lang_reflect_Constructor::slot(reflected); 453 } else { 454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 455 mirror = java_lang_reflect_Method::clazz(reflected); 456 slot = java_lang_reflect_Method::slot(reflected); 457 } 458 Klass* k = java_lang_Class::as_Klass(mirror); 459 460 KlassHandle k1(THREAD, k); 461 // Make sure class is initialized before handing id's out to methods 462 k1()->initialize(CHECK_NULL); 463 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 464 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 465 return ret; 466JNI_END 467 468DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 469 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 470 471JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 472 JNIWrapper("FromReflectedField"); 473 474 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 475 476 jfieldID ret = NULL; 477 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 478 479 // field is a handle to a java.lang.reflect.Field object 480 oop reflected = JNIHandles::resolve_non_null(field); 481 oop mirror = java_lang_reflect_Field::clazz(reflected); 482 Klass* k = java_lang_Class::as_Klass(mirror); 483 int slot = java_lang_reflect_Field::slot(reflected); 484 int modifiers = java_lang_reflect_Field::modifiers(reflected); 485 486 KlassHandle k1(THREAD, k); 487 // Make sure class is initialized before handing id's out to fields 488 k1()->initialize(CHECK_NULL); 489 490 // First check if this is a static field 491 if (modifiers & JVM_ACC_STATIC) { 492 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 493 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 494 assert(id != NULL, "corrupt Field object"); 495 debug_only(id->set_is_static_field_id();) 496 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 497 ret = jfieldIDWorkaround::to_static_jfieldID(id); 498 return ret; 499 } 500 501 // The slot is the index of the field description in the field-array 502 // The jfieldID is the offset of the field within the object 503 // It may also have hash bits for k, if VerifyJNIFields is turned on. 504 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 505 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 506 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 507 return ret; 508JNI_END 509 510 511DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 512 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 513 514JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 515 JNIWrapper("ToReflectedMethod"); 516 517 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 518 519 jobject ret = NULL; 520 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 521 522 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 523 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 524 oop reflection_method; 525 if (m->is_initializer()) { 526 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 527 } else { 528 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 529 } 530 ret = JNIHandles::make_local(env, reflection_method); 531 return ret; 532JNI_END 533 534DT_RETURN_MARK_DECL(GetSuperclass, jclass 535 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 536 537JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 538 JNIWrapper("GetSuperclass"); 539 540 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 541 542 jclass obj = NULL; 543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 544 545 oop mirror = JNIHandles::resolve_non_null(sub); 546 // primitive classes return NULL 547 if (java_lang_Class::is_primitive(mirror)) return NULL; 548 549 // Rules of Class.getSuperClass as implemented by KLass::java_super: 550 // arrays return Object 551 // interfaces return NULL 552 // proper classes return Klass::super() 553 Klass* k = java_lang_Class::as_Klass(mirror); 554 if (k->is_interface()) return NULL; 555 556 // return mirror for superclass 557 Klass* super = k->java_super(); 558 // super2 is the value computed by the compiler's getSuperClass intrinsic: 559 debug_only(Klass* super2 = ( k->oop_is_array() 560 ? SystemDictionary::Object_klass() 561 : k->super() ) ); 562 assert(super == super2, 563 "java_super computation depends on interface, array, other super"); 564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 565 return obj; 566JNI_END 567 568JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 569 JNIWrapper("IsSubclassOf"); 570 571 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 572 573 oop sub_mirror = JNIHandles::resolve_non_null(sub); 574 oop super_mirror = JNIHandles::resolve_non_null(super); 575 if (java_lang_Class::is_primitive(sub_mirror) || 576 java_lang_Class::is_primitive(super_mirror)) { 577 jboolean ret = (sub_mirror == super_mirror); 578 579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 580 return ret; 581 } 582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 585 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 586 JNI_TRUE : JNI_FALSE; 587 588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 589 return ret; 590JNI_END 591 592 593DT_RETURN_MARK_DECL(Throw, jint 594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 595 596JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 597 JNIWrapper("Throw"); 598 599 HOTSPOT_JNI_THROW_ENTRY(env, obj); 600 601 jint ret = JNI_OK; 602 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 603 604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 605 ShouldNotReachHere(); 606JNI_END 607 608 609DT_RETURN_MARK_DECL(ThrowNew, jint 610 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 611 612JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 613 JNIWrapper("ThrowNew"); 614 615 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 616 617 jint ret = JNI_OK; 618 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 619 620 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 621 Symbol* name = k->name(); 622 Handle class_loader (THREAD, k->class_loader()); 623 Handle protection_domain (THREAD, k->protection_domain()); 624 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 625 ShouldNotReachHere(); 626JNI_END 627 628 629// JNI functions only transform a pending async exception to a synchronous 630// exception in ExceptionOccurred and ExceptionCheck calls, since 631// delivering an async exception in other places won't change the native 632// code's control flow and would be harmful when native code further calls 633// JNI functions with a pending exception. Async exception is also checked 634// during the call, so ExceptionOccurred/ExceptionCheck won't return 635// false but deliver the async exception at the very end during 636// state transition. 637 638static void jni_check_async_exceptions(JavaThread *thread) { 639 assert(thread == Thread::current(), "must be itself"); 640 thread->check_and_handle_async_exceptions(); 641} 642 643JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 644 JNIWrapper("ExceptionOccurred"); 645 646 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 647 648 jni_check_async_exceptions(thread); 649 oop exception = thread->pending_exception(); 650 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 651 652 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 653 return ret; 654JNI_END 655 656 657JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 658 JNIWrapper("ExceptionDescribe"); 659 660 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 661 662 if (thread->has_pending_exception()) { 663 Handle ex(thread, thread->pending_exception()); 664 thread->clear_pending_exception(); 665 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 666 // Don't print anything if we are being killed. 667 } else { 668 jio_fprintf(defaultStream::error_stream(), "Exception "); 669 if (thread != NULL && thread->threadObj() != NULL) { 670 ResourceMark rm(THREAD); 671 jio_fprintf(defaultStream::error_stream(), 672 "in thread \"%s\" ", thread->get_thread_name()); 673 } 674 if (ex->is_a(SystemDictionary::Throwable_klass())) { 675 JavaValue result(T_VOID); 676 JavaCalls::call_virtual(&result, 677 ex, 678 KlassHandle(THREAD, 679 SystemDictionary::Throwable_klass()), 680 vmSymbols::printStackTrace_name(), 681 vmSymbols::void_method_signature(), 682 THREAD); 683 // If an exception is thrown in the call it gets thrown away. Not much 684 // we can do with it. The native code that calls this, does not check 685 // for the exception - hence, it might still be in the thread when DestroyVM gets 686 // called, potentially causing a few asserts to trigger - since no pending exception 687 // is expected. 688 CLEAR_PENDING_EXCEPTION; 689 } else { 690 ResourceMark rm(THREAD); 691 jio_fprintf(defaultStream::error_stream(), 692 ". Uncaught exception of type %s.", 693 ex->klass()->external_name()); 694 } 695 } 696 } 697 698 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 699JNI_END 700 701 702JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 703 JNIWrapper("ExceptionClear"); 704 705 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 706 707 // The jni code might be using this API to clear java thrown exception. 708 // So just mark jvmti thread exception state as exception caught. 709 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 710 if (state != NULL && state->is_exception_detected()) { 711 state->set_exception_caught(); 712 } 713 thread->clear_pending_exception(); 714 715 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 716JNI_END 717 718 719JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 720 JNIWrapper("FatalError"); 721 722 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 723 724 tty->print_cr("FATAL ERROR in native method: %s", msg); 725 thread->print_stack(); 726 os::abort(); // Dump core and abort 727JNI_END 728 729 730JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 731 JNIWrapper("PushLocalFrame"); 732 733 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 734 735 //%note jni_11 736 if (capacity < 0 || 737 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 738 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 739 return JNI_ERR; 740 } 741 JNIHandleBlock* old_handles = thread->active_handles(); 742 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 743 assert(new_handles != NULL, "should not be NULL"); 744 new_handles->set_pop_frame_link(old_handles); 745 thread->set_active_handles(new_handles); 746 jint ret = JNI_OK; 747 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 748 return ret; 749JNI_END 750 751 752JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 753 JNIWrapper("PopLocalFrame"); 754 755 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 756 757 //%note jni_11 758 Handle result_handle(thread, JNIHandles::resolve(result)); 759 JNIHandleBlock* old_handles = thread->active_handles(); 760 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 761 if (new_handles != NULL) { 762 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 763 // This way code will still work if PopLocalFrame is called without a corresponding 764 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 765 // the release_block call will release the blocks. 766 thread->set_active_handles(new_handles); 767 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 768 JNIHandleBlock::release_block(old_handles, thread); // may block 769 result = JNIHandles::make_local(thread, result_handle()); 770 } 771 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 772 return result; 773JNI_END 774 775 776JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 777 JNIWrapper("NewGlobalRef"); 778 779 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 780 781 Handle ref_handle(thread, JNIHandles::resolve(ref)); 782 jobject ret = JNIHandles::make_global(ref_handle); 783 784 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 785 return ret; 786JNI_END 787 788// Must be JNI_ENTRY (with HandleMark) 789JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 790 JNIWrapper("DeleteGlobalRef"); 791 792 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 793 794 JNIHandles::destroy_global(ref); 795 796 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 797JNI_END 798 799JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 800 JNIWrapper("DeleteLocalRef"); 801 802 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 803 804 JNIHandles::destroy_local(obj); 805 806 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 807JNI_END 808 809JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 810 JNIWrapper("IsSameObject"); 811 812 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 813 814 oop a = JNIHandles::resolve(r1); 815 oop b = JNIHandles::resolve(r2); 816 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 817 818 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 819 return ret; 820JNI_END 821 822 823JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 824 JNIWrapper("NewLocalRef"); 825 826 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 827 828 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 829 830 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 831 return ret; 832JNI_END 833 834JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 835 JNIWrapper("EnsureLocalCapacity"); 836 837 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 838 839 jint ret; 840 if (capacity >= 0 && 841 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 842 ret = JNI_OK; 843 } else { 844 ret = JNI_ERR; 845 } 846 847 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 848 return ret; 849JNI_END 850 851// Return the Handle Type 852JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 853 JNIWrapper("GetObjectRefType"); 854 855 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 856 857 jobjectRefType ret; 858 if (JNIHandles::is_local_handle(thread, obj) || 859 JNIHandles::is_frame_handle(thread, obj)) 860 ret = JNILocalRefType; 861 else if (JNIHandles::is_global_handle(obj)) 862 ret = JNIGlobalRefType; 863 else if (JNIHandles::is_weak_global_handle(obj)) 864 ret = JNIWeakGlobalRefType; 865 else 866 ret = JNIInvalidRefType; 867 868 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 869 return ret; 870JNI_END 871 872 873class JNI_ArgumentPusher : public SignatureIterator { 874 protected: 875 JavaCallArguments* _arguments; 876 877 virtual void get_bool () = 0; 878 virtual void get_char () = 0; 879 virtual void get_short () = 0; 880 virtual void get_byte () = 0; 881 virtual void get_int () = 0; 882 virtual void get_long () = 0; 883 virtual void get_float () = 0; 884 virtual void get_double () = 0; 885 virtual void get_object () = 0; 886 887 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 888 this->_return_type = T_ILLEGAL; 889 _arguments = NULL; 890 } 891 892 public: 893 virtual void iterate( uint64_t fingerprint ) = 0; 894 895 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 896 897 inline void do_bool() { if (!is_return_type()) get_bool(); } 898 inline void do_char() { if (!is_return_type()) get_char(); } 899 inline void do_short() { if (!is_return_type()) get_short(); } 900 inline void do_byte() { if (!is_return_type()) get_byte(); } 901 inline void do_int() { if (!is_return_type()) get_int(); } 902 inline void do_long() { if (!is_return_type()) get_long(); } 903 inline void do_float() { if (!is_return_type()) get_float(); } 904 inline void do_double() { if (!is_return_type()) get_double(); } 905 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 906 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 907 inline void do_void() { } 908 909 JavaCallArguments* arguments() { return _arguments; } 910 void push_receiver(Handle h) { _arguments->push_oop(h); } 911}; 912 913 914class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 915 protected: 916 va_list _ap; 917 918 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 919 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 920 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 921 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 922 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 923 924 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 925 926 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 927 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 928 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 929 inline void get_object() { jobject l = va_arg(_ap, jobject); 930 _arguments->push_oop(Handle((oop *)l, false)); } 931 932 inline void set_ap(va_list rap) { 933#ifdef va_copy 934 va_copy(_ap, rap); 935#elif defined (__va_copy) 936 __va_copy(_ap, rap); 937#else 938 _ap = rap; 939#endif 940 } 941 942 public: 943 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 944 : JNI_ArgumentPusher(signature) { 945 set_ap(rap); 946 } 947 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 948 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 949 set_ap(rap); 950 } 951 952 // Optimized path if we have the bitvector form of signature 953 void iterate( uint64_t fingerprint ) { 954 if (fingerprint == (uint64_t)CONST64(-1)) { 955 SignatureIterator::iterate(); // Must be too many arguments 956 } else { 957 _return_type = (BasicType)((fingerprint >> static_feature_size) & 958 result_feature_mask); 959 960 assert(fingerprint, "Fingerprint should not be 0"); 961 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 962 while ( 1 ) { 963 switch ( fingerprint & parameter_feature_mask ) { 964 case bool_parm: 965 case char_parm: 966 case short_parm: 967 case byte_parm: 968 case int_parm: 969 get_int(); 970 break; 971 case obj_parm: 972 get_object(); 973 break; 974 case long_parm: 975 get_long(); 976 break; 977 case float_parm: 978 get_float(); 979 break; 980 case double_parm: 981 get_double(); 982 break; 983 case done_parm: 984 return; 985 break; 986 default: 987 ShouldNotReachHere(); 988 break; 989 } 990 fingerprint >>= parameter_feature_size; 991 } 992 } 993 } 994}; 995 996 997class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 998 protected: 999 const jvalue *_ap; 1000 1001 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 1002 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1003 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1004 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1005 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1006 1007 inline void get_long() { _arguments->push_long((_ap++)->j); } 1008 inline void get_float() { _arguments->push_float((_ap++)->f); } 1009 inline void get_double() { _arguments->push_double((_ap++)->d);} 1010 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1011 1012 inline void set_ap(const jvalue *rap) { _ap = rap; } 1013 1014 public: 1015 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1016 : JNI_ArgumentPusher(signature) { 1017 set_ap(rap); 1018 } 1019 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1020 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1021 set_ap(rap); 1022 } 1023 1024 // Optimized path if we have the bitvector form of signature 1025 void iterate( uint64_t fingerprint ) { 1026 if (fingerprint == (uint64_t)CONST64(-1)) { 1027 SignatureIterator::iterate(); // Must be too many arguments 1028 } else { 1029 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1030 result_feature_mask); 1031 assert(fingerprint, "Fingerprint should not be 0"); 1032 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1033 while ( 1 ) { 1034 switch ( fingerprint & parameter_feature_mask ) { 1035 case bool_parm: 1036 get_bool(); 1037 break; 1038 case char_parm: 1039 get_char(); 1040 break; 1041 case short_parm: 1042 get_short(); 1043 break; 1044 case byte_parm: 1045 get_byte(); 1046 break; 1047 case int_parm: 1048 get_int(); 1049 break; 1050 case obj_parm: 1051 get_object(); 1052 break; 1053 case long_parm: 1054 get_long(); 1055 break; 1056 case float_parm: 1057 get_float(); 1058 break; 1059 case double_parm: 1060 get_double(); 1061 break; 1062 case done_parm: 1063 return; 1064 break; 1065 default: 1066 ShouldNotReachHere(); 1067 break; 1068 } 1069 fingerprint >>= parameter_feature_size; 1070 } 1071 } 1072 } 1073}; 1074 1075 1076enum JNICallType { 1077 JNI_STATIC, 1078 JNI_VIRTUAL, 1079 JNI_NONVIRTUAL 1080}; 1081 1082 1083 1084static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1085 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1086 1087 // Create object to hold arguments for the JavaCall, and associate it with 1088 // the jni parser 1089 ResourceMark rm(THREAD); 1090 int number_of_parameters = method->size_of_parameters(); 1091 JavaCallArguments java_args(number_of_parameters); 1092 args->set_java_argument_object(&java_args); 1093 1094 assert(method->is_static(), "method should be static"); 1095 1096 // Fill out JavaCallArguments object 1097 args->iterate( Fingerprinter(method).fingerprint() ); 1098 // Initialize result type 1099 result->set_type(args->get_ret_type()); 1100 1101 // Invoke the method. Result is returned as oop. 1102 JavaCalls::call(result, method, &java_args, CHECK); 1103 1104 // Convert result 1105 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1106 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1107 } 1108} 1109 1110 1111static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1112 oop recv = JNIHandles::resolve(receiver); 1113 if (recv == NULL) { 1114 THROW(vmSymbols::java_lang_NullPointerException()); 1115 } 1116 Handle h_recv(THREAD, recv); 1117 1118 int number_of_parameters; 1119 Method* selected_method; 1120 { 1121 Method* m = Method::resolve_jmethod_id(method_id); 1122 number_of_parameters = m->size_of_parameters(); 1123 Klass* holder = m->method_holder(); 1124 if (!(holder)->is_interface()) { 1125 // non-interface call -- for that little speed boost, don't handlize 1126 debug_only(No_Safepoint_Verifier nosafepoint;) 1127 if (call_type == JNI_VIRTUAL) { 1128 // jni_GetMethodID makes sure class is linked and initialized 1129 // so m should have a valid vtable index. 1130 assert(!m->has_itable_index(), ""); 1131 int vtbl_index = m->vtable_index(); 1132 if (vtbl_index != Method::nonvirtual_vtable_index) { 1133 Klass* k = h_recv->klass(); 1134 // k might be an arrayKlassOop but all vtables start at 1135 // the same place. The cast is to avoid virtual call and assertion. 1136 InstanceKlass *ik = (InstanceKlass*)k; 1137 selected_method = ik->method_at_vtable(vtbl_index); 1138 } else { 1139 // final method 1140 selected_method = m; 1141 } 1142 } else { 1143 // JNI_NONVIRTUAL call 1144 selected_method = m; 1145 } 1146 } else { 1147 // interface call 1148 KlassHandle h_holder(THREAD, holder); 1149 1150 if (call_type == JNI_VIRTUAL) { 1151 int itbl_index = m->itable_index(); 1152 Klass* k = h_recv->klass(); 1153 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1154 } else { 1155 selected_method = m; 1156 } 1157 } 1158 } 1159 1160 methodHandle method(THREAD, selected_method); 1161 1162 // Create object to hold arguments for the JavaCall, and associate it with 1163 // the jni parser 1164 ResourceMark rm(THREAD); 1165 JavaCallArguments java_args(number_of_parameters); 1166 args->set_java_argument_object(&java_args); 1167 1168 // handle arguments 1169 assert(!method->is_static(), "method should not be static"); 1170 args->push_receiver(h_recv); // Push jobject handle 1171 1172 // Fill out JavaCallArguments object 1173 args->iterate( Fingerprinter(method).fingerprint() ); 1174 // Initialize result type 1175 result->set_type(args->get_ret_type()); 1176 1177 // Invoke the method. Result is returned as oop. 1178 JavaCalls::call(result, method, &java_args, CHECK); 1179 1180 // Convert result 1181 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1182 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1183 } 1184} 1185 1186 1187static instanceOop alloc_object(jclass clazz, TRAPS) { 1188 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1189 if (k == NULL) { 1190 ResourceMark rm(THREAD); 1191 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1192 } 1193 k()->check_valid_for_instantiation(false, CHECK_NULL); 1194 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1195 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1196 return ih; 1197} 1198 1199DT_RETURN_MARK_DECL(AllocObject, jobject 1200 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1201 1202JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1203 JNIWrapper("AllocObject"); 1204 1205 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1206 1207 jobject ret = NULL; 1208 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1209 1210 instanceOop i = alloc_object(clazz, CHECK_NULL); 1211 ret = JNIHandles::make_local(env, i); 1212 return ret; 1213JNI_END 1214 1215DT_RETURN_MARK_DECL(NewObjectA, jobject 1216 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1217 1218JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1219 JNIWrapper("NewObjectA"); 1220 1221 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1222 1223 jobject obj = NULL; 1224 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1225 1226 instanceOop i = alloc_object(clazz, CHECK_NULL); 1227 obj = JNIHandles::make_local(env, i); 1228 JavaValue jvalue(T_VOID); 1229 JNI_ArgumentPusherArray ap(methodID, args); 1230 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1231 return obj; 1232JNI_END 1233 1234 1235DT_RETURN_MARK_DECL(NewObjectV, jobject 1236 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1237 1238JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1239 JNIWrapper("NewObjectV"); 1240 1241 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1242 1243 jobject obj = NULL; 1244 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1245 1246 instanceOop i = alloc_object(clazz, CHECK_NULL); 1247 obj = JNIHandles::make_local(env, i); 1248 JavaValue jvalue(T_VOID); 1249 JNI_ArgumentPusherVaArg ap(methodID, args); 1250 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1251 return obj; 1252JNI_END 1253 1254 1255DT_RETURN_MARK_DECL(NewObject, jobject 1256 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1257 1258JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1259 JNIWrapper("NewObject"); 1260 1261 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1262 1263 jobject obj = NULL; 1264 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1265 1266 instanceOop i = alloc_object(clazz, CHECK_NULL); 1267 obj = JNIHandles::make_local(env, i); 1268 va_list args; 1269 va_start(args, methodID); 1270 JavaValue jvalue(T_VOID); 1271 JNI_ArgumentPusherVaArg ap(methodID, args); 1272 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1273 va_end(args); 1274 return obj; 1275JNI_END 1276 1277 1278JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1279 JNIWrapper("GetObjectClass"); 1280 1281 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1282 1283 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1284 jclass ret = 1285 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1286 1287 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1288 return ret; 1289JNI_END 1290 1291JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1292 JNIWrapper("IsInstanceOf"); 1293 1294 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1295 1296 jboolean ret = JNI_TRUE; 1297 if (obj != NULL) { 1298 ret = JNI_FALSE; 1299 Klass* k = java_lang_Class::as_Klass( 1300 JNIHandles::resolve_non_null(clazz)); 1301 if (k != NULL) { 1302 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1303 } 1304 } 1305 1306 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1307 return ret; 1308JNI_END 1309 1310 1311static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1312 const char *sig, bool is_static, TRAPS) { 1313 // %%%% This code should probably just call into a method in the LinkResolver 1314 // 1315 // The class should have been loaded (we have an instance of the class 1316 // passed in) so the method and signature should already be in the symbol 1317 // table. If they're not there, the method doesn't exist. 1318 const char *name_to_probe = (name_str == NULL) 1319 ? vmSymbols::object_initializer_name()->as_C_string() 1320 : name_str; 1321 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1322 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1323 1324 if (name == NULL || signature == NULL) { 1325 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1326 } 1327 1328 // Throw a NoSuchMethodError exception if we have an instance of a 1329 // primitive java.lang.Class 1330 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1331 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1332 } 1333 1334 KlassHandle klass(THREAD, 1335 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1336 1337 // Make sure class is linked and initialized before handing id's out to 1338 // Method*s. 1339 klass()->initialize(CHECK_NULL); 1340 1341 Method* m; 1342 if (name == vmSymbols::object_initializer_name() || 1343 name == vmSymbols::class_initializer_name()) { 1344 // Never search superclasses for constructors 1345 if (klass->oop_is_instance()) { 1346 m = InstanceKlass::cast(klass())->find_method(name, signature); 1347 } else { 1348 m = NULL; 1349 } 1350 } else { 1351 m = klass->lookup_method(name, signature); 1352 if (m == NULL && klass->oop_is_instance()) { 1353 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1354 } 1355 } 1356 if (m == NULL || (m->is_static() != is_static)) { 1357 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1358 } 1359 return m->jmethod_id(); 1360} 1361 1362 1363JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1364 const char *name, const char *sig)) 1365 JNIWrapper("GetMethodID"); 1366 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1367 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1368 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1369 return ret; 1370JNI_END 1371 1372 1373JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1374 const char *name, const char *sig)) 1375 JNIWrapper("GetStaticMethodID"); 1376 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1377 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1378 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1379 return ret; 1380JNI_END 1381 1382 1383 1384// 1385// Calling Methods 1386// 1387 1388 1389#define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1390 , EntryProbe, ReturnProbe) \ 1391\ 1392 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1393 , ReturnProbe); \ 1394\ 1395JNI_ENTRY(ResultType, \ 1396 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1397 JNIWrapper("Call" XSTR(Result) "Method"); \ 1398\ 1399 EntryProbe; \ 1400 ResultType ret = 0;\ 1401 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1402 (const ResultType&)ret);\ 1403\ 1404 va_list args; \ 1405 va_start(args, methodID); \ 1406 JavaValue jvalue(Tag); \ 1407 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1408 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1409 va_end(args); \ 1410 ret = jvalue.get_##ResultType(); \ 1411 return ret;\ 1412JNI_END 1413 1414// the runtime type of subword integral basic types is integer 1415DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1416 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1417 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1418DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1419 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1420 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1421DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1422 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1423 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1424DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1425 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1426 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1427 1428DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1429 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1431DEFINE_CALLMETHOD(jint, Int, T_INT, 1432 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1434DEFINE_CALLMETHOD(jlong, Long, T_LONG 1435 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1436 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1437// Float and double probes don't return value because dtrace doesn't currently support it 1438DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1439 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1441DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1442 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1443 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1444 1445#define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1446 , EntryProbe, ReturnProbe) \ 1447\ 1448 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1449 , ReturnProbe); \ 1450\ 1451JNI_ENTRY(ResultType, \ 1452 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1453 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1454\ 1455 EntryProbe;\ 1456 ResultType ret = 0;\ 1457 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1458 (const ResultType&)ret);\ 1459\ 1460 JavaValue jvalue(Tag); \ 1461 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1462 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1463 ret = jvalue.get_##ResultType(); \ 1464 return ret;\ 1465JNI_END 1466 1467// the runtime type of subword integral basic types is integer 1468DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1469 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1470 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1471DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1472 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1473 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1474DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1475 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1476 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1477DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1478 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1479 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1480 1481DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1482 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1484DEFINE_CALLMETHODV(jint, Int, T_INT, 1485 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1487DEFINE_CALLMETHODV(jlong, Long, T_LONG 1488 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1489 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1490// Float and double probes don't return value because dtrace doesn't currently support it 1491DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1492 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1494DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1495 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1496 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1497 1498#define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1499 , EntryProbe, ReturnProbe) \ 1500\ 1501 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1502 , ReturnProbe); \ 1503\ 1504JNI_ENTRY(ResultType, \ 1505 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1506 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1507 EntryProbe; \ 1508 ResultType ret = 0;\ 1509 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1510 (const ResultType&)ret);\ 1511\ 1512 JavaValue jvalue(Tag); \ 1513 JNI_ArgumentPusherArray ap(methodID, args); \ 1514 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1515 ret = jvalue.get_##ResultType(); \ 1516 return ret;\ 1517JNI_END 1518 1519// the runtime type of subword integral basic types is integer 1520DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1521 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1522 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1523DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1524 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1525 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1526DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1527 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1528 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1529DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1530 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1531 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1532 1533DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1534 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1536DEFINE_CALLMETHODA(jint, Int, T_INT, 1537 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1539DEFINE_CALLMETHODA(jlong, Long, T_LONG 1540 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1541 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1542// Float and double probes don't return value because dtrace doesn't currently support it 1543DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1544 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1546DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1547 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1548 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1549 1550DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1551DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1552DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1553 1554 1555JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1556 JNIWrapper("CallVoidMethod"); 1557 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1558 DT_VOID_RETURN_MARK(CallVoidMethod); 1559 1560 va_list args; 1561 va_start(args, methodID); 1562 JavaValue jvalue(T_VOID); 1563 JNI_ArgumentPusherVaArg ap(methodID, args); 1564 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1565 va_end(args); 1566JNI_END 1567 1568 1569JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1570 JNIWrapper("CallVoidMethodV"); 1571 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1572 DT_VOID_RETURN_MARK(CallVoidMethodV); 1573 1574 JavaValue jvalue(T_VOID); 1575 JNI_ArgumentPusherVaArg ap(methodID, args); 1576 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1577JNI_END 1578 1579 1580JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1581 JNIWrapper("CallVoidMethodA"); 1582 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1583 DT_VOID_RETURN_MARK(CallVoidMethodA); 1584 1585 JavaValue jvalue(T_VOID); 1586 JNI_ArgumentPusherArray ap(methodID, args); 1587 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1588JNI_END 1589 1590 1591 1592#define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1593 , EntryProbe, ReturnProbe) \ 1594\ 1595 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1596 , ReturnProbe);\ 1597\ 1598JNI_ENTRY(ResultType, \ 1599 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1600 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1601\ 1602 EntryProbe;\ 1603 ResultType ret;\ 1604 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1605 (const ResultType&)ret);\ 1606\ 1607 va_list args; \ 1608 va_start(args, methodID); \ 1609 JavaValue jvalue(Tag); \ 1610 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1611 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1612 va_end(args); \ 1613 ret = jvalue.get_##ResultType(); \ 1614 return ret;\ 1615JNI_END 1616 1617// the runtime type of subword integral basic types is integer 1618DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1619 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1620 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1621DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1622 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1623 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1624DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1625 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1626 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1627DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1628 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1629 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1630 1631DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1632 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1634DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1635 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1637DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1638 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1639// Float and double probes don't return value because dtrace doesn't currently support it 1640 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1641DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1642 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1644DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1645 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1646 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1647 1648#define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1649 , EntryProbe, ReturnProbe) \ 1650\ 1651 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1652 , ReturnProbe);\ 1653\ 1654JNI_ENTRY(ResultType, \ 1655 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1656 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1657\ 1658 EntryProbe;\ 1659 ResultType ret;\ 1660 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1661 (const ResultType&)ret);\ 1662\ 1663 JavaValue jvalue(Tag); \ 1664 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1665 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1666 ret = jvalue.get_##ResultType(); \ 1667 return ret;\ 1668JNI_END 1669 1670// the runtime type of subword integral basic types is integer 1671DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1672 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1673 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1674DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1675 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1676 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1677DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1678 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1679 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1680DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1681 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1682 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1683 1684DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1685 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1687DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1688 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1690DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1691 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1692// Float and double probes don't return value because dtrace doesn't currently support it 1693 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1694DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1695 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1697DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1698 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1699 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1700 1701#define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1702 , EntryProbe, ReturnProbe) \ 1703\ 1704 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1705 , ReturnProbe);\ 1706\ 1707JNI_ENTRY(ResultType, \ 1708 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1709 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1710\ 1711 EntryProbe;\ 1712 ResultType ret;\ 1713 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1714 (const ResultType&)ret);\ 1715\ 1716 JavaValue jvalue(Tag); \ 1717 JNI_ArgumentPusherArray ap(methodID, args); \ 1718 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1719 ret = jvalue.get_##ResultType(); \ 1720 return ret;\ 1721JNI_END 1722 1723// the runtime type of subword integral basic types is integer 1724DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1725 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1726 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1727DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1728 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1729 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1730DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1731 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1732 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1733DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1734 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1735 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1736 1737DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1738 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1740DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1741 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1743DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1744 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1745// Float and double probes don't return value because dtrace doesn't currently support it 1746 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1747DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1748 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1750DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1751 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1752 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1753 1754DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1755 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1756DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1757 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1758DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1759 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1760 1761JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1762 JNIWrapper("CallNonvirtualVoidMethod"); 1763 1764 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1765 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1766 1767 va_list args; 1768 va_start(args, methodID); 1769 JavaValue jvalue(T_VOID); 1770 JNI_ArgumentPusherVaArg ap(methodID, args); 1771 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1772 va_end(args); 1773JNI_END 1774 1775 1776JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1777 JNIWrapper("CallNonvirtualVoidMethodV"); 1778 1779 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1780 env, obj, cls, (uintptr_t) methodID); 1781 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1782 1783 JavaValue jvalue(T_VOID); 1784 JNI_ArgumentPusherVaArg ap(methodID, args); 1785 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1786JNI_END 1787 1788 1789JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1790 JNIWrapper("CallNonvirtualVoidMethodA"); 1791 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1792 env, obj, cls, (uintptr_t) methodID); 1793 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1794 JavaValue jvalue(T_VOID); 1795 JNI_ArgumentPusherArray ap(methodID, args); 1796 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1797JNI_END 1798 1799 1800 1801#define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1802 , EntryProbe, ResultProbe) \ 1803\ 1804 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1805 , ResultProbe); \ 1806\ 1807JNI_ENTRY(ResultType, \ 1808 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1809 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1810\ 1811 EntryProbe; \ 1812 ResultType ret = 0;\ 1813 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1814 (const ResultType&)ret);\ 1815\ 1816 va_list args; \ 1817 va_start(args, methodID); \ 1818 JavaValue jvalue(Tag); \ 1819 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1820 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1821 va_end(args); \ 1822 ret = jvalue.get_##ResultType(); \ 1823 return ret;\ 1824JNI_END 1825 1826// the runtime type of subword integral basic types is integer 1827DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1828 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1829 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1830DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1831 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1832 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1833DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1834 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1835 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1836DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1837 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1838 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1839 1840DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1841 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1843DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1844 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1846DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1847 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1848 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1849// Float and double probes don't return value because dtrace doesn't currently support it 1850DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1851 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1853DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1854 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1855 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1856 1857#define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1858 , EntryProbe, ResultProbe) \ 1859\ 1860 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1861 , ResultProbe); \ 1862\ 1863JNI_ENTRY(ResultType, \ 1864 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1865 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1866\ 1867 EntryProbe; \ 1868 ResultType ret = 0;\ 1869 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1870 (const ResultType&)ret);\ 1871\ 1872 JavaValue jvalue(Tag); \ 1873 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1874 /* Make sure class is initialized before trying to invoke its method */ \ 1875 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1876 k()->initialize(CHECK_0); \ 1877 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1878 va_end(args); \ 1879 ret = jvalue.get_##ResultType(); \ 1880 return ret;\ 1881JNI_END 1882 1883// the runtime type of subword integral basic types is integer 1884DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1885 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1886 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1887DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1888 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1889 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1890DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1891 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1892 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1893DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1894 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1895 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1896 1897DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1898 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1900DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1901 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1903DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1904 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1905 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1906// Float and double probes don't return value because dtrace doesn't currently support it 1907DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1908 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1910DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1911 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1912 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1913 1914#define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1915 , EntryProbe, ResultProbe) \ 1916\ 1917 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1918 , ResultProbe); \ 1919\ 1920JNI_ENTRY(ResultType, \ 1921 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1922 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1923\ 1924 EntryProbe; \ 1925 ResultType ret = 0;\ 1926 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1927 (const ResultType&)ret);\ 1928\ 1929 JavaValue jvalue(Tag); \ 1930 JNI_ArgumentPusherArray ap(methodID, args); \ 1931 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1932 ret = jvalue.get_##ResultType(); \ 1933 return ret;\ 1934JNI_END 1935 1936// the runtime type of subword integral basic types is integer 1937DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1938 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1939 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1940DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1941 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1942 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1943DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1944 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1945 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1946DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1947 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1948 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1949 1950DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1951 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1953DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1954 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1956DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1957 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1958 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1959// Float and double probes don't return value because dtrace doesn't currently support it 1960DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1961 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1963DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1964 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1965 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1966 1967DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1968 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1969DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1970 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1971DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1972 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1973 1974JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1975 JNIWrapper("CallStaticVoidMethod"); 1976 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1977 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1978 1979 va_list args; 1980 va_start(args, methodID); 1981 JavaValue jvalue(T_VOID); 1982 JNI_ArgumentPusherVaArg ap(methodID, args); 1983 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1984 va_end(args); 1985JNI_END 1986 1987 1988JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1989 JNIWrapper("CallStaticVoidMethodV"); 1990 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1991 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1992 1993 JavaValue jvalue(T_VOID); 1994 JNI_ArgumentPusherVaArg ap(methodID, args); 1995 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1996JNI_END 1997 1998 1999JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2000 JNIWrapper("CallStaticVoidMethodA"); 2001 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2002 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2003 2004 JavaValue jvalue(T_VOID); 2005 JNI_ArgumentPusherArray ap(methodID, args); 2006 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2007JNI_END 2008 2009 2010// 2011// Accessing Fields 2012// 2013 2014 2015DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2016 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2017 2018JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2019 const char *name, const char *sig)) 2020 JNIWrapper("GetFieldID"); 2021 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2022 jfieldID ret = 0; 2023 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2024 2025 // The class should have been loaded (we have an instance of the class 2026 // passed in) so the field and signature should already be in the symbol 2027 // table. If they're not there, the field doesn't exist. 2028 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2029 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2030 if (fieldname == NULL || signame == NULL) { 2031 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2032 } 2033 KlassHandle k(THREAD, 2034 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2035 // Make sure class is initialized before handing id's out to fields 2036 k()->initialize(CHECK_NULL); 2037 2038 fieldDescriptor fd; 2039 if (!k()->oop_is_instance() || 2040 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2041 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2042 } 2043 2044 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2045 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2046 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2047 return ret; 2048JNI_END 2049 2050 2051JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2052 JNIWrapper("GetObjectField"); 2053 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2054 oop o = JNIHandles::resolve_non_null(obj); 2055 Klass* k = o->klass(); 2056 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2057 // Keep JVMTI addition small and only check enabled flag here. 2058 // jni_GetField_probe() assumes that is okay to create handles. 2059 if (JvmtiExport::should_post_field_access()) { 2060 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2061 } 2062 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2063#if INCLUDE_ALL_GCS 2064 // If G1 is enabled and we are accessing the value of the referent 2065 // field in a reference object then we need to register a non-null 2066 // referent with the SATB barrier. 2067 if (UseG1GC) { 2068 bool needs_barrier = false; 2069 2070 if (ret != NULL && 2071 offset == java_lang_ref_Reference::referent_offset && 2072 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2073 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2074 needs_barrier = true; 2075 } 2076 2077 if (needs_barrier) { 2078 oop referent = JNIHandles::resolve(ret); 2079 G1SATBCardTableModRefBS::enqueue(referent); 2080 } 2081 } 2082#endif // INCLUDE_ALL_GCS 2083HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2084 return ret; 2085JNI_END 2086 2087 2088 2089#define DEFINE_GETFIELD(Return,Fieldname,Result \ 2090 , EntryProbe, ReturnProbe) \ 2091\ 2092 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2093 , ReturnProbe); \ 2094\ 2095JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2096 JNIWrapper("Get" XSTR(Result) "Field"); \ 2097\ 2098 EntryProbe; \ 2099 Return ret = 0;\ 2100 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2101\ 2102 oop o = JNIHandles::resolve_non_null(obj); \ 2103 Klass* k = o->klass(); \ 2104 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2105 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2106 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2107 /* and creates a ResetNoHandleMark. */ \ 2108 if (JvmtiExport::should_post_field_access()) { \ 2109 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2110 } \ 2111 ret = o->Fieldname##_field(offset); \ 2112 return ret; \ 2113JNI_END 2114 2115DEFINE_GETFIELD(jboolean, bool, Boolean 2116 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2117 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2118DEFINE_GETFIELD(jbyte, byte, Byte 2119 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2120 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2121DEFINE_GETFIELD(jchar, char, Char 2122 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2123 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2124DEFINE_GETFIELD(jshort, short, Short 2125 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2126 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2127DEFINE_GETFIELD(jint, int, Int 2128 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2129 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2130DEFINE_GETFIELD(jlong, long, Long 2131 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2132 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2133// Float and double probes don't return value because dtrace doesn't currently support it 2134DEFINE_GETFIELD(jfloat, float, Float 2135 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2137DEFINE_GETFIELD(jdouble, double, Double 2138 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2139 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2140 2141address jni_GetBooleanField_addr() { 2142 return (address)jni_GetBooleanField; 2143} 2144address jni_GetByteField_addr() { 2145 return (address)jni_GetByteField; 2146} 2147address jni_GetCharField_addr() { 2148 return (address)jni_GetCharField; 2149} 2150address jni_GetShortField_addr() { 2151 return (address)jni_GetShortField; 2152} 2153address jni_GetIntField_addr() { 2154 return (address)jni_GetIntField; 2155} 2156address jni_GetLongField_addr() { 2157 return (address)jni_GetLongField; 2158} 2159address jni_GetFloatField_addr() { 2160 return (address)jni_GetFloatField; 2161} 2162address jni_GetDoubleField_addr() { 2163 return (address)jni_GetDoubleField; 2164} 2165 2166JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2167 JNIWrapper("SetObjectField"); 2168 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2169 oop o = JNIHandles::resolve_non_null(obj); 2170 Klass* k = o->klass(); 2171 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2172 // Keep JVMTI addition small and only check enabled flag here. 2173 // jni_SetField_probe_nh() assumes that is not okay to create handles 2174 // and creates a ResetNoHandleMark. 2175 if (JvmtiExport::should_post_field_modification()) { 2176 jvalue field_value; 2177 field_value.l = value; 2178 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2179 } 2180 o->obj_field_put(offset, JNIHandles::resolve(value)); 2181 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2182JNI_END 2183 2184 2185#define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2186 , EntryProbe, ReturnProbe) \ 2187\ 2188JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2189 JNIWrapper("Set" XSTR(Result) "Field"); \ 2190\ 2191 EntryProbe; \ 2192\ 2193 oop o = JNIHandles::resolve_non_null(obj); \ 2194 Klass* k = o->klass(); \ 2195 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2196 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2197 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2198 /* and creates a ResetNoHandleMark. */ \ 2199 if (JvmtiExport::should_post_field_modification()) { \ 2200 jvalue field_value; \ 2201 field_value.unionType = value; \ 2202 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2203 } \ 2204 o->Fieldname##_field_put(offset, value); \ 2205 ReturnProbe; \ 2206JNI_END 2207 2208DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2209 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2210 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2211DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2212 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2213 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2214DEFINE_SETFIELD(jchar, char, Char, 'C', c 2215 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2216 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2217DEFINE_SETFIELD(jshort, short, Short, 'S', s 2218 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2219 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2220DEFINE_SETFIELD(jint, int, Int, 'I', i 2221 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2222 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2223DEFINE_SETFIELD(jlong, long, Long, 'J', j 2224 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2225 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2226// Float and double probes don't return value because dtrace doesn't currently support it 2227DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2228 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2229 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2230DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2231 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2232 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2233 2234DT_RETURN_MARK_DECL(ToReflectedField, jobject 2235 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2236 2237JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2238 JNIWrapper("ToReflectedField"); 2239 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2240 jobject ret = NULL; 2241 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2242 2243 fieldDescriptor fd; 2244 bool found = false; 2245 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2246 2247 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2248 2249 if (isStatic) { 2250 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2251 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2252 assert(id->is_static_field_id(), "invalid static field id"); 2253 found = id->find_local_field(&fd); 2254 } else { 2255 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2256 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2257 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2258 } 2259 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2260 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2261 ret = JNIHandles::make_local(env, reflected); 2262 return ret; 2263JNI_END 2264 2265 2266// 2267// Accessing Static Fields 2268// 2269DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2270 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2271 2272JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2273 const char *name, const char *sig)) 2274 JNIWrapper("GetStaticFieldID"); 2275 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2276 jfieldID ret = NULL; 2277 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2278 2279 // The class should have been loaded (we have an instance of the class 2280 // passed in) so the field and signature should already be in the symbol 2281 // table. If they're not there, the field doesn't exist. 2282 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2283 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2284 if (fieldname == NULL || signame == NULL) { 2285 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2286 } 2287 KlassHandle k(THREAD, 2288 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2289 // Make sure class is initialized before handing id's out to static fields 2290 k()->initialize(CHECK_NULL); 2291 2292 fieldDescriptor fd; 2293 if (!k()->oop_is_instance() || 2294 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2295 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2296 } 2297 2298 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2299 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2300 debug_only(id->set_is_static_field_id();) 2301 2302 debug_only(id->verify(fd.field_holder())); 2303 2304 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2305 return ret; 2306JNI_END 2307 2308 2309JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2310 JNIWrapper("GetStaticObjectField"); 2311 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2312#if INCLUDE_JNI_CHECK 2313 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2314#endif // INCLUDE_JNI_CHECK 2315 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2316 assert(id->is_static_field_id(), "invalid static field id"); 2317 // Keep JVMTI addition small and only check enabled flag here. 2318 // jni_GetField_probe() assumes that is okay to create handles. 2319 if (JvmtiExport::should_post_field_access()) { 2320 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2321 } 2322 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2323 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2324 return ret; 2325JNI_END 2326 2327 2328#define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2329 , EntryProbe, ReturnProbe) \ 2330\ 2331 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2332 , ReturnProbe); \ 2333\ 2334JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2335 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2336 EntryProbe; \ 2337 Return ret = 0;\ 2338 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2339 (const Return&)ret);\ 2340 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2341 assert(id->is_static_field_id(), "invalid static field id"); \ 2342 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2343 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2344 if (JvmtiExport::should_post_field_access()) { \ 2345 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2346 } \ 2347 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2348 return ret;\ 2349JNI_END 2350 2351DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2352 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2353DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2354 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2355DEFINE_GETSTATICFIELD(jchar, char, Char 2356 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2357DEFINE_GETSTATICFIELD(jshort, short, Short 2358 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2359DEFINE_GETSTATICFIELD(jint, int, Int 2360 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2361DEFINE_GETSTATICFIELD(jlong, long, Long 2362 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2363// Float and double probes don't return value because dtrace doesn't currently support it 2364DEFINE_GETSTATICFIELD(jfloat, float, Float 2365 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2366DEFINE_GETSTATICFIELD(jdouble, double, Double 2367 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2368 2369JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2370 JNIWrapper("SetStaticObjectField"); 2371 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2372 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2373 assert(id->is_static_field_id(), "invalid static field id"); 2374 // Keep JVMTI addition small and only check enabled flag here. 2375 // jni_SetField_probe() assumes that is okay to create handles. 2376 if (JvmtiExport::should_post_field_modification()) { 2377 jvalue field_value; 2378 field_value.l = value; 2379 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2380 } 2381 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2382 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2383JNI_END 2384 2385 2386 2387#define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2388 , EntryProbe, ReturnProbe) \ 2389\ 2390JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2391 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2392 EntryProbe; \ 2393\ 2394 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2395 assert(id->is_static_field_id(), "invalid static field id"); \ 2396 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2397 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2398 if (JvmtiExport::should_post_field_modification()) { \ 2399 jvalue field_value; \ 2400 field_value.unionType = value; \ 2401 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2402 } \ 2403 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2404 ReturnProbe;\ 2405JNI_END 2406 2407DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2408 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2409 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2410DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2411 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2412 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2413DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2414 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2415 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2416DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2417 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2418 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2419DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2420 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2421 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2422DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2423 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2424 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2425// Float and double probes don't return value because dtrace doesn't currently support it 2426DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2427 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2428 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2429DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2430 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2431 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2432 2433// 2434// String Operations 2435// 2436 2437// Unicode Interface 2438 2439DT_RETURN_MARK_DECL(NewString, jstring 2440 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2441 2442JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2443 JNIWrapper("NewString"); 2444 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2445 jstring ret = NULL; 2446 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2447 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2448 ret = (jstring) JNIHandles::make_local(env, string); 2449 return ret; 2450JNI_END 2451 2452 2453JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2454 JNIWrapper("GetStringLength"); 2455 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2456 jsize ret = 0; 2457 oop s = JNIHandles::resolve_non_null(string); 2458 if (java_lang_String::value(s) != NULL) { 2459 ret = java_lang_String::length(s); 2460 } 2461 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2462 return ret; 2463JNI_END 2464 2465 2466JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2467 JNIEnv *env, jstring string, jboolean *isCopy)) 2468 JNIWrapper("GetStringChars"); 2469 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2470 jchar* buf = NULL; 2471 oop s = JNIHandles::resolve_non_null(string); 2472 typeArrayOop s_value = java_lang_String::value(s); 2473 if (s_value != NULL) { 2474 int s_len = java_lang_String::length(s); 2475 int s_offset = java_lang_String::offset(s); 2476 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2477 /* JNI Specification states return NULL on OOM */ 2478 if (buf != NULL) { 2479 if (s_len > 0) { 2480 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); 2481 } 2482 buf[s_len] = 0; 2483 //%note jni_5 2484 if (isCopy != NULL) { 2485 *isCopy = JNI_TRUE; 2486 } 2487 } 2488 } 2489 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2490 return buf; 2491JNI_END 2492 2493 2494JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2495 JNIWrapper("ReleaseStringChars"); 2496 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2497 //%note jni_6 2498 if (chars != NULL) { 2499 // Since String objects are supposed to be immutable, don't copy any 2500 // new data back. A bad user will have to go after the char array. 2501 FreeHeap((void*) chars); 2502 } 2503 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2504JNI_END 2505 2506 2507// UTF Interface 2508 2509DT_RETURN_MARK_DECL(NewStringUTF, jstring 2510 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2511 2512JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2513 JNIWrapper("NewStringUTF"); 2514 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2515 jstring ret; 2516 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2517 2518 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2519 ret = (jstring) JNIHandles::make_local(env, result); 2520 return ret; 2521JNI_END 2522 2523 2524JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2525 JNIWrapper("GetStringUTFLength"); 2526 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2527 jsize ret = 0; 2528 oop java_string = JNIHandles::resolve_non_null(string); 2529 if (java_lang_String::value(java_string) != NULL) { 2530 ret = java_lang_String::utf8_length(java_string); 2531 } 2532 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2533 return ret; 2534JNI_END 2535 2536 2537JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2538 JNIWrapper("GetStringUTFChars"); 2539 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2540 char* result = NULL; 2541 oop java_string = JNIHandles::resolve_non_null(string); 2542 if (java_lang_String::value(java_string) != NULL) { 2543 size_t length = java_lang_String::utf8_length(java_string); 2544 /* JNI Specification states return NULL on OOM */ 2545 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2546 if (result != NULL) { 2547 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2548 if (isCopy != NULL) { 2549 *isCopy = JNI_TRUE; 2550 } 2551 } 2552 } 2553 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2554 return result; 2555JNI_END 2556 2557 2558JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2559 JNIWrapper("ReleaseStringUTFChars"); 2560 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2561 if (chars != NULL) { 2562 FreeHeap((char*) chars); 2563 } 2564HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2565JNI_END 2566 2567 2568JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2569 JNIWrapper("GetArrayLength"); 2570 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2571 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2572 assert(a->is_array(), "must be array"); 2573 jsize ret = a->length(); 2574 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2575 return ret; 2576JNI_END 2577 2578 2579// 2580// Object Array Operations 2581// 2582 2583DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2584 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2585 2586JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2587 JNIWrapper("NewObjectArray"); 2588 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2589 jobjectArray ret = NULL; 2590 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2591 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2592 Klass* ako = ek()->array_klass(CHECK_NULL); 2593 KlassHandle ak = KlassHandle(THREAD, ako); 2594 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2595 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2596 oop initial_value = JNIHandles::resolve(initialElement); 2597 if (initial_value != NULL) { // array already initialized with NULL 2598 for (int index = 0; index < length; index++) { 2599 result->obj_at_put(index, initial_value); 2600 } 2601 } 2602 ret = (jobjectArray) JNIHandles::make_local(env, result); 2603 return ret; 2604JNI_END 2605 2606DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2607 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2608 2609JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2610 JNIWrapper("GetObjectArrayElement"); 2611 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2612 jobject ret = NULL; 2613 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2614 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2615 if (a->is_within_bounds(index)) { 2616 ret = JNIHandles::make_local(env, a->obj_at(index)); 2617 return ret; 2618 } else { 2619 char buf[jintAsStringSize]; 2620 sprintf(buf, "%d", index); 2621 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2622 } 2623JNI_END 2624 2625DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2626 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2627 2628JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2629 JNIWrapper("SetObjectArrayElement"); 2630 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2631 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2632 2633 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2634 oop v = JNIHandles::resolve(value); 2635 if (a->is_within_bounds(index)) { 2636 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2637 a->obj_at_put(index, v); 2638 } else { 2639 THROW(vmSymbols::java_lang_ArrayStoreException()); 2640 } 2641 } else { 2642 char buf[jintAsStringSize]; 2643 sprintf(buf, "%d", index); 2644 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2645 } 2646JNI_END 2647 2648 2649 2650#define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2651 ,EntryProbe,ReturnProbe) \ 2652\ 2653 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2654 , ReturnProbe); \ 2655\ 2656JNI_ENTRY(Return, \ 2657 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2658 JNIWrapper("New" XSTR(Result) "Array"); \ 2659 EntryProbe; \ 2660 Return ret = NULL;\ 2661 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2662\ 2663 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2664 ret = (Return) JNIHandles::make_local(env, obj); \ 2665 return ret;\ 2666JNI_END 2667 2668DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2669 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2670 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2671DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2672 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2673 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2674DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2675 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2676 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2677DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2678 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2679 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2680DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2681 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2682 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2683DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2684 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2685 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2686DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2687 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2688 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2689DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2690 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2691 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2692 2693// Return an address which will fault if the caller writes to it. 2694 2695static char* get_bad_address() { 2696 static char* bad_address = NULL; 2697 if (bad_address == NULL) { 2698 size_t size = os::vm_allocation_granularity(); 2699 bad_address = os::reserve_memory(size); 2700 if (bad_address != NULL) { 2701 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2702 /*is_committed*/false); 2703 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2704 } 2705 } 2706 return bad_address; 2707} 2708 2709 2710 2711#define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2712 , EntryProbe, ReturnProbe) \ 2713\ 2714JNI_QUICK_ENTRY(ElementType*, \ 2715 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2716 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2717 EntryProbe; \ 2718 /* allocate an chunk of memory in c land */ \ 2719 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2720 ElementType* result; \ 2721 int len = a->length(); \ 2722 if (len == 0) { \ 2723 /* Empty array: legal but useless, can't return NULL. \ 2724 * Return a pointer to something useless. \ 2725 * Avoid asserts in typeArrayOop. */ \ 2726 result = (ElementType*)get_bad_address(); \ 2727 } else { \ 2728 /* JNI Specification states return NULL on OOM */ \ 2729 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2730 if (result != NULL) { \ 2731 /* copy the array to the c chunk */ \ 2732 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2733 if (isCopy) { \ 2734 *isCopy = JNI_TRUE; \ 2735 } \ 2736 } \ 2737 } \ 2738 ReturnProbe; \ 2739 return result; \ 2740JNI_END 2741 2742DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2743 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2744 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2745DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2746 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2747 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2748DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2749 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2750 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2751DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2752 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2753 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2754DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2755 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2756 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2757DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2758 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2760// Float and double probes don't return value because dtrace doesn't currently support it 2761DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2762 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2763 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2764DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2765 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2766 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2767 2768 2769#define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2770 , EntryProbe, ReturnProbe);\ 2771\ 2772JNI_QUICK_ENTRY(void, \ 2773 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2774 ElementType *buf, jint mode)) \ 2775 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2776 EntryProbe; \ 2777 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2778 int len = a->length(); \ 2779 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2780 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2781 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2782 } \ 2783 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2784 FreeHeap(buf); \ 2785 } \ 2786 } \ 2787 ReturnProbe; \ 2788JNI_END 2789 2790DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2791 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2792 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2793DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2794 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2795 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2796DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2797 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2798 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2799DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2800 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2801 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2802DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2803 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2804 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2805DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2806 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2807 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2808DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2809 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2810 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2811DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2812 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2813 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2814 2815 2816#define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2817 , EntryProbe, ReturnProbe); \ 2818 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2819 , ReturnProbe); \ 2820\ 2821JNI_ENTRY(void, \ 2822jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2823 jsize len, ElementType *buf)) \ 2824 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2825 EntryProbe; \ 2826 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2827 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2828 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2829 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2830 } else { \ 2831 if (len > 0) { \ 2832 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2833 memcpy((u_char*) buf, \ 2834 (u_char*) src->Tag##_at_addr(start), \ 2835 len << sc); \ 2836 } \ 2837 } \ 2838JNI_END 2839 2840DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2841 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2842 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2843DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2844 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2845 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2846DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2847 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2848 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2849DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2850 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2851 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2852DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2853 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2854 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2855DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2856 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2857 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2858DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2859 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2860 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2861DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2862 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2863 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2864 2865 2866#define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2867 , EntryProbe, ReturnProbe); \ 2868 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2869 ,ReturnProbe); \ 2870\ 2871JNI_ENTRY(void, \ 2872jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2873 jsize len, const ElementType *buf)) \ 2874 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2875 EntryProbe; \ 2876 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2877 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2878 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2879 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2880 } else { \ 2881 if (len > 0) { \ 2882 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2883 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2884 (u_char*) buf, \ 2885 len << sc); \ 2886 } \ 2887 } \ 2888JNI_END 2889 2890DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2891 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2892 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2893DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2894 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2895 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2896DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2897 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2898 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2899DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2900 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2901 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2902DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2903 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2904 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2905DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2906 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2907 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2908DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2909 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2910 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2911DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2912 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2913 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2914 2915 2916// 2917// Interception of natives 2918// 2919 2920// The RegisterNatives call being attempted tried to register with a method that 2921// is not native. Ask JVM TI what prefixes have been specified. Then check 2922// to see if the native method is now wrapped with the prefixes. See the 2923// SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2924static Method* find_prefixed_native(KlassHandle k, 2925 Symbol* name, Symbol* signature, TRAPS) { 2926#if INCLUDE_JVMTI 2927 ResourceMark rm(THREAD); 2928 Method* method; 2929 int name_len = name->utf8_length(); 2930 char* name_str = name->as_utf8(); 2931 int prefix_count; 2932 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2933 for (int i = 0; i < prefix_count; i++) { 2934 char* prefix = prefixes[i]; 2935 int prefix_len = (int)strlen(prefix); 2936 2937 // try adding this prefix to the method name and see if it matches another method name 2938 int trial_len = name_len + prefix_len; 2939 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2940 strcpy(trial_name_str, prefix); 2941 strcat(trial_name_str, name_str); 2942 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2943 if (trial_name == NULL) { 2944 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2945 } 2946 method = k()->lookup_method(trial_name, signature); 2947 if (method == NULL) { 2948 continue; // signature doesn't match, try the next prefix 2949 } 2950 if (method->is_native()) { 2951 method->set_is_prefixed_native(); 2952 return method; // wahoo, we found a prefixed version of the method, return it 2953 } 2954 // found as non-native, so prefix is good, add it, probably just need more prefixes 2955 name_len = trial_len; 2956 name_str = trial_name_str; 2957 } 2958#endif // INCLUDE_JVMTI 2959 return NULL; // not found 2960} 2961 2962static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2963 Method* method = k()->lookup_method(name, signature); 2964 if (method == NULL) { 2965 ResourceMark rm; 2966 stringStream st; 2967 st.print("Method %s name or signature does not match", 2968 Method::name_and_sig_as_C_string(k(), name, signature)); 2969 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2970 } 2971 if (!method->is_native()) { 2972 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2973 method = find_prefixed_native(k, name, signature, THREAD); 2974 if (method == NULL) { 2975 ResourceMark rm; 2976 stringStream st; 2977 st.print("Method %s is not declared as native", 2978 Method::name_and_sig_as_C_string(k(), name, signature)); 2979 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2980 } 2981 } 2982 2983 if (entry != NULL) { 2984 method->set_native_function(entry, 2985 Method::native_bind_event_is_interesting); 2986 } else { 2987 method->clear_native_function(); 2988 } 2989 if (PrintJNIResolving) { 2990 ResourceMark rm(THREAD); 2991 tty->print_cr("[Registering JNI native method %s.%s]", 2992 method->method_holder()->external_name(), 2993 method->name()->as_C_string()); 2994 } 2995 return true; 2996} 2997 2998DT_RETURN_MARK_DECL(RegisterNatives, jint 2999 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3000 3001JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3002 const JNINativeMethod *methods, 3003 jint nMethods)) 3004 JNIWrapper("RegisterNatives"); 3005 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3006 jint ret = 0; 3007 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3008 3009 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3010 3011 for (int index = 0; index < nMethods; index++) { 3012 const char* meth_name = methods[index].name; 3013 const char* meth_sig = methods[index].signature; 3014 int meth_name_len = (int)strlen(meth_name); 3015 3016 // The class should have been loaded (we have an instance of the class 3017 // passed in) so the method and signature should already be in the symbol 3018 // table. If they're not there, the method doesn't exist. 3019 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3020 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3021 3022 if (name == NULL || signature == NULL) { 3023 ResourceMark rm; 3024 stringStream st; 3025 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3026 // Must return negative value on failure 3027 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3028 } 3029 3030 bool res = register_native(h_k, name, signature, 3031 (address) methods[index].fnPtr, THREAD); 3032 if (!res) { 3033 ret = -1; 3034 break; 3035 } 3036 } 3037 return ret; 3038JNI_END 3039 3040 3041JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3042 JNIWrapper("UnregisterNatives"); 3043 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3044 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3045 //%note jni_2 3046 if (k->oop_is_instance()) { 3047 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3048 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3049 if (m->is_native()) { 3050 m->clear_native_function(); 3051 m->set_signature_handler(NULL); 3052 } 3053 } 3054 } 3055 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3056 return 0; 3057JNI_END 3058 3059// 3060// Monitor functions 3061// 3062 3063DT_RETURN_MARK_DECL(MonitorEnter, jint 3064 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3065 3066JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3067 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3068 jint ret = JNI_ERR; 3069 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3070 3071 // If the object is null, we can't do anything with it 3072 if (jobj == NULL) { 3073 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3074 } 3075 3076 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3077 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3078 ret = JNI_OK; 3079 return ret; 3080JNI_END 3081 3082DT_RETURN_MARK_DECL(MonitorExit, jint 3083 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3084 3085JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3086 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3087 jint ret = JNI_ERR; 3088 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3089 3090 // Don't do anything with a null object 3091 if (jobj == NULL) { 3092 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3093 } 3094 3095 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3096 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3097 3098 ret = JNI_OK; 3099 return ret; 3100JNI_END 3101 3102// 3103// Extensions 3104// 3105 3106DT_VOID_RETURN_MARK_DECL(GetStringRegion 3107 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3108 3109JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3110 JNIWrapper("GetStringRegion"); 3111 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3112 DT_VOID_RETURN_MARK(GetStringRegion); 3113 oop s = JNIHandles::resolve_non_null(string); 3114 int s_len = java_lang_String::length(s); 3115 if (start < 0 || len < 0 || start + len > s_len) { 3116 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3117 } else { 3118 if (len > 0) { 3119 int s_offset = java_lang_String::offset(s); 3120 typeArrayOop s_value = java_lang_String::value(s); 3121 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); 3122 } 3123 } 3124JNI_END 3125 3126DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3127 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3128 3129JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3130 JNIWrapper("GetStringUTFRegion"); 3131 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3132 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3133 oop s = JNIHandles::resolve_non_null(string); 3134 int s_len = java_lang_String::length(s); 3135 if (start < 0 || len < 0 || start + len > s_len) { 3136 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3137 } else { 3138 //%note jni_7 3139 if (len > 0) { 3140 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3141 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3142 // as_utf8_string null-terminates the result string 3143 } else { 3144 // JDK null-terminates the buffer even in len is zero 3145 if (buf != NULL) { 3146 buf[0] = 0; 3147 } 3148 } 3149 } 3150JNI_END 3151 3152 3153JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3154 JNIWrapper("GetPrimitiveArrayCritical"); 3155 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3156 GC_locker::lock_critical(thread); 3157 if (isCopy != NULL) { 3158 *isCopy = JNI_FALSE; 3159 } 3160 oop a = JNIHandles::resolve_non_null(array); 3161 assert(a->is_array(), "just checking"); 3162 BasicType type; 3163 if (a->is_objArray()) { 3164 type = T_OBJECT; 3165 } else { 3166 type = TypeArrayKlass::cast(a->klass())->element_type(); 3167 } 3168 void* ret = arrayOop(a)->base(type); 3169 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3170 return ret; 3171JNI_END 3172 3173 3174JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3175 JNIWrapper("ReleasePrimitiveArrayCritical"); 3176 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3177 // The array, carray and mode arguments are ignored 3178 GC_locker::unlock_critical(thread); 3179HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3180JNI_END 3181 3182 3183JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3184 JNIWrapper("GetStringCritical"); 3185 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3186 GC_locker::lock_critical(thread); 3187 if (isCopy != NULL) { 3188 *isCopy = JNI_FALSE; 3189 } 3190 oop s = JNIHandles::resolve_non_null(string); 3191 int s_len = java_lang_String::length(s); 3192 typeArrayOop s_value = java_lang_String::value(s); 3193 int s_offset = java_lang_String::offset(s); 3194 const jchar* ret; 3195 if (s_len > 0) { 3196 ret = s_value->char_at_addr(s_offset); 3197 } else { 3198 ret = (jchar*) s_value->base(T_CHAR); 3199 } 3200 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3201 return ret; 3202JNI_END 3203 3204 3205JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3206 JNIWrapper("ReleaseStringCritical"); 3207 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3208 // The str and chars arguments are ignored 3209 GC_locker::unlock_critical(thread); 3210HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3211JNI_END 3212 3213 3214JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3215 JNIWrapper("jni_NewWeakGlobalRef"); 3216 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3217 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3218 jweak ret = JNIHandles::make_weak_global(ref_handle); 3219 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3220 return ret; 3221JNI_END 3222 3223// Must be JNI_ENTRY (with HandleMark) 3224JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3225 JNIWrapper("jni_DeleteWeakGlobalRef"); 3226 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3227 JNIHandles::destroy_weak_global(ref); 3228 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3229JNI_END 3230 3231 3232JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3233 JNIWrapper("jni_ExceptionCheck"); 3234 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3235 jni_check_async_exceptions(thread); 3236 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3237 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3238 return ret; 3239JNI_END 3240 3241 3242// Initialization state for three routines below relating to 3243// java.nio.DirectBuffers 3244static jint directBufferSupportInitializeStarted = 0; 3245static volatile jint directBufferSupportInitializeEnded = 0; 3246static volatile jint directBufferSupportInitializeFailed = 0; 3247static jclass bufferClass = NULL; 3248static jclass directBufferClass = NULL; 3249static jclass directByteBufferClass = NULL; 3250static jmethodID directByteBufferConstructor = NULL; 3251static jfieldID directBufferAddressField = NULL; 3252static jfieldID bufferCapacityField = NULL; 3253 3254static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3255 Handle loader; // null (bootstrap) loader 3256 Handle protection_domain; // null protection domain 3257 3258 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3259 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3260 3261 if (TraceClassResolution && result != NULL) { 3262 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3263 } 3264 return result; 3265} 3266 3267// These lookups are done with the NULL (bootstrap) ClassLoader to 3268// circumvent any security checks that would be done by jni_FindClass. 3269JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3270{ 3271 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3272 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3273 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3274 return true; 3275} 3276JNI_END 3277 3278 3279static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3280 if (directBufferSupportInitializeFailed) { 3281 return false; 3282 } 3283 3284 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3285 if (!lookupDirectBufferClasses(env)) { 3286 directBufferSupportInitializeFailed = 1; 3287 return false; 3288 } 3289 3290 // Make global references for these 3291 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3292 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3293 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3294 3295 // Get needed field and method IDs 3296 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3297 if (env->ExceptionCheck()) { 3298 env->ExceptionClear(); 3299 directBufferSupportInitializeFailed = 1; 3300 return false; 3301 } 3302 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3303 if (env->ExceptionCheck()) { 3304 env->ExceptionClear(); 3305 directBufferSupportInitializeFailed = 1; 3306 return false; 3307 } 3308 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3309 if (env->ExceptionCheck()) { 3310 env->ExceptionClear(); 3311 directBufferSupportInitializeFailed = 1; 3312 return false; 3313 } 3314 3315 if ((directByteBufferConstructor == NULL) || 3316 (directBufferAddressField == NULL) || 3317 (bufferCapacityField == NULL)) { 3318 directBufferSupportInitializeFailed = 1; 3319 return false; 3320 } 3321 3322 directBufferSupportInitializeEnded = 1; 3323 } else { 3324 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3325 os::naked_yield(); 3326 } 3327 } 3328 3329 return !directBufferSupportInitializeFailed; 3330} 3331 3332extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3333{ 3334 // thread_from_jni_environment() will block if VM is gone. 3335 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3336 3337 JNIWrapper("jni_NewDirectByteBuffer"); 3338 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3339 3340 if (!directBufferSupportInitializeEnded) { 3341 if (!initializeDirectBufferSupport(env, thread)) { 3342 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3343 return NULL; 3344 } 3345 } 3346 3347 // Being paranoid about accidental sign extension on address 3348 jlong addr = (jlong) ((uintptr_t) address); 3349 // NOTE that package-private DirectByteBuffer constructor currently 3350 // takes int capacity 3351 jint cap = (jint) capacity; 3352 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3353 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3354 return ret; 3355} 3356 3357DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3358 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3359 3360extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3361{ 3362 // thread_from_jni_environment() will block if VM is gone. 3363 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3364 3365 JNIWrapper("jni_GetDirectBufferAddress"); 3366 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3367 void* ret = NULL; 3368 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3369 3370 if (!directBufferSupportInitializeEnded) { 3371 if (!initializeDirectBufferSupport(env, thread)) { 3372 return 0; 3373 } 3374 } 3375 3376 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3377 return 0; 3378 } 3379 3380 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3381 return ret; 3382} 3383 3384DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3385 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3386 3387extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3388{ 3389 // thread_from_jni_environment() will block if VM is gone. 3390 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3391 3392 JNIWrapper("jni_GetDirectBufferCapacity"); 3393 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3394 jlong ret = -1; 3395 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3396 3397 if (!directBufferSupportInitializeEnded) { 3398 if (!initializeDirectBufferSupport(env, thread)) { 3399 ret = 0; 3400 return ret; 3401 } 3402 } 3403 3404 if (buf == NULL) { 3405 return -1; 3406 } 3407 3408 if (!env->IsInstanceOf(buf, directBufferClass)) { 3409 return -1; 3410 } 3411 3412 // NOTE that capacity is currently an int in the implementation 3413 ret = env->GetIntField(buf, bufferCapacityField); 3414 return ret; 3415} 3416 3417 3418JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3419 JNIWrapper("GetVersion"); 3420 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3421 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3422 return CurrentVersion; 3423JNI_END 3424 3425extern struct JavaVM_ main_vm; 3426 3427JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3428 JNIWrapper("jni_GetJavaVM"); 3429 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3430 *vm = (JavaVM *)(&main_vm); 3431 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3432 return JNI_OK; 3433JNI_END 3434 3435// Structure containing all jni functions 3436struct JNINativeInterface_ jni_NativeInterface = { 3437 NULL, 3438 NULL, 3439 NULL, 3440 3441 NULL, 3442 3443 jni_GetVersion, 3444 3445 jni_DefineClass, 3446 jni_FindClass, 3447 3448 jni_FromReflectedMethod, 3449 jni_FromReflectedField, 3450 3451 jni_ToReflectedMethod, 3452 3453 jni_GetSuperclass, 3454 jni_IsAssignableFrom, 3455 3456 jni_ToReflectedField, 3457 3458 jni_Throw, 3459 jni_ThrowNew, 3460 jni_ExceptionOccurred, 3461 jni_ExceptionDescribe, 3462 jni_ExceptionClear, 3463 jni_FatalError, 3464 3465 jni_PushLocalFrame, 3466 jni_PopLocalFrame, 3467 3468 jni_NewGlobalRef, 3469 jni_DeleteGlobalRef, 3470 jni_DeleteLocalRef, 3471 jni_IsSameObject, 3472 3473 jni_NewLocalRef, 3474 jni_EnsureLocalCapacity, 3475 3476 jni_AllocObject, 3477 jni_NewObject, 3478 jni_NewObjectV, 3479 jni_NewObjectA, 3480 3481 jni_GetObjectClass, 3482 jni_IsInstanceOf, 3483 3484 jni_GetMethodID, 3485 3486 jni_CallObjectMethod, 3487 jni_CallObjectMethodV, 3488 jni_CallObjectMethodA, 3489 jni_CallBooleanMethod, 3490 jni_CallBooleanMethodV, 3491 jni_CallBooleanMethodA, 3492 jni_CallByteMethod, 3493 jni_CallByteMethodV, 3494 jni_CallByteMethodA, 3495 jni_CallCharMethod, 3496 jni_CallCharMethodV, 3497 jni_CallCharMethodA, 3498 jni_CallShortMethod, 3499 jni_CallShortMethodV, 3500 jni_CallShortMethodA, 3501 jni_CallIntMethod, 3502 jni_CallIntMethodV, 3503 jni_CallIntMethodA, 3504 jni_CallLongMethod, 3505 jni_CallLongMethodV, 3506 jni_CallLongMethodA, 3507 jni_CallFloatMethod, 3508 jni_CallFloatMethodV, 3509 jni_CallFloatMethodA, 3510 jni_CallDoubleMethod, 3511 jni_CallDoubleMethodV, 3512 jni_CallDoubleMethodA, 3513 jni_CallVoidMethod, 3514 jni_CallVoidMethodV, 3515 jni_CallVoidMethodA, 3516 3517 jni_CallNonvirtualObjectMethod, 3518 jni_CallNonvirtualObjectMethodV, 3519 jni_CallNonvirtualObjectMethodA, 3520 jni_CallNonvirtualBooleanMethod, 3521 jni_CallNonvirtualBooleanMethodV, 3522 jni_CallNonvirtualBooleanMethodA, 3523 jni_CallNonvirtualByteMethod, 3524 jni_CallNonvirtualByteMethodV, 3525 jni_CallNonvirtualByteMethodA, 3526 jni_CallNonvirtualCharMethod, 3527 jni_CallNonvirtualCharMethodV, 3528 jni_CallNonvirtualCharMethodA, 3529 jni_CallNonvirtualShortMethod, 3530 jni_CallNonvirtualShortMethodV, 3531 jni_CallNonvirtualShortMethodA, 3532 jni_CallNonvirtualIntMethod, 3533 jni_CallNonvirtualIntMethodV, 3534 jni_CallNonvirtualIntMethodA, 3535 jni_CallNonvirtualLongMethod, 3536 jni_CallNonvirtualLongMethodV, 3537 jni_CallNonvirtualLongMethodA, 3538 jni_CallNonvirtualFloatMethod, 3539 jni_CallNonvirtualFloatMethodV, 3540 jni_CallNonvirtualFloatMethodA, 3541 jni_CallNonvirtualDoubleMethod, 3542 jni_CallNonvirtualDoubleMethodV, 3543 jni_CallNonvirtualDoubleMethodA, 3544 jni_CallNonvirtualVoidMethod, 3545 jni_CallNonvirtualVoidMethodV, 3546 jni_CallNonvirtualVoidMethodA, 3547 3548 jni_GetFieldID, 3549 3550 jni_GetObjectField, 3551 jni_GetBooleanField, 3552 jni_GetByteField, 3553 jni_GetCharField, 3554 jni_GetShortField, 3555 jni_GetIntField, 3556 jni_GetLongField, 3557 jni_GetFloatField, 3558 jni_GetDoubleField, 3559 3560 jni_SetObjectField, 3561 jni_SetBooleanField, 3562 jni_SetByteField, 3563 jni_SetCharField, 3564 jni_SetShortField, 3565 jni_SetIntField, 3566 jni_SetLongField, 3567 jni_SetFloatField, 3568 jni_SetDoubleField, 3569 3570 jni_GetStaticMethodID, 3571 3572 jni_CallStaticObjectMethod, 3573 jni_CallStaticObjectMethodV, 3574 jni_CallStaticObjectMethodA, 3575 jni_CallStaticBooleanMethod, 3576 jni_CallStaticBooleanMethodV, 3577 jni_CallStaticBooleanMethodA, 3578 jni_CallStaticByteMethod, 3579 jni_CallStaticByteMethodV, 3580 jni_CallStaticByteMethodA, 3581 jni_CallStaticCharMethod, 3582 jni_CallStaticCharMethodV, 3583 jni_CallStaticCharMethodA, 3584 jni_CallStaticShortMethod, 3585 jni_CallStaticShortMethodV, 3586 jni_CallStaticShortMethodA, 3587 jni_CallStaticIntMethod, 3588 jni_CallStaticIntMethodV, 3589 jni_CallStaticIntMethodA, 3590 jni_CallStaticLongMethod, 3591 jni_CallStaticLongMethodV, 3592 jni_CallStaticLongMethodA, 3593 jni_CallStaticFloatMethod, 3594 jni_CallStaticFloatMethodV, 3595 jni_CallStaticFloatMethodA, 3596 jni_CallStaticDoubleMethod, 3597 jni_CallStaticDoubleMethodV, 3598 jni_CallStaticDoubleMethodA, 3599 jni_CallStaticVoidMethod, 3600 jni_CallStaticVoidMethodV, 3601 jni_CallStaticVoidMethodA, 3602 3603 jni_GetStaticFieldID, 3604 3605 jni_GetStaticObjectField, 3606 jni_GetStaticBooleanField, 3607 jni_GetStaticByteField, 3608 jni_GetStaticCharField, 3609 jni_GetStaticShortField, 3610 jni_GetStaticIntField, 3611 jni_GetStaticLongField, 3612 jni_GetStaticFloatField, 3613 jni_GetStaticDoubleField, 3614 3615 jni_SetStaticObjectField, 3616 jni_SetStaticBooleanField, 3617 jni_SetStaticByteField, 3618 jni_SetStaticCharField, 3619 jni_SetStaticShortField, 3620 jni_SetStaticIntField, 3621 jni_SetStaticLongField, 3622 jni_SetStaticFloatField, 3623 jni_SetStaticDoubleField, 3624 3625 jni_NewString, 3626 jni_GetStringLength, 3627 jni_GetStringChars, 3628 jni_ReleaseStringChars, 3629 3630 jni_NewStringUTF, 3631 jni_GetStringUTFLength, 3632 jni_GetStringUTFChars, 3633 jni_ReleaseStringUTFChars, 3634 3635 jni_GetArrayLength, 3636 3637 jni_NewObjectArray, 3638 jni_GetObjectArrayElement, 3639 jni_SetObjectArrayElement, 3640 3641 jni_NewBooleanArray, 3642 jni_NewByteArray, 3643 jni_NewCharArray, 3644 jni_NewShortArray, 3645 jni_NewIntArray, 3646 jni_NewLongArray, 3647 jni_NewFloatArray, 3648 jni_NewDoubleArray, 3649 3650 jni_GetBooleanArrayElements, 3651 jni_GetByteArrayElements, 3652 jni_GetCharArrayElements, 3653 jni_GetShortArrayElements, 3654 jni_GetIntArrayElements, 3655 jni_GetLongArrayElements, 3656 jni_GetFloatArrayElements, 3657 jni_GetDoubleArrayElements, 3658 3659 jni_ReleaseBooleanArrayElements, 3660 jni_ReleaseByteArrayElements, 3661 jni_ReleaseCharArrayElements, 3662 jni_ReleaseShortArrayElements, 3663 jni_ReleaseIntArrayElements, 3664 jni_ReleaseLongArrayElements, 3665 jni_ReleaseFloatArrayElements, 3666 jni_ReleaseDoubleArrayElements, 3667 3668 jni_GetBooleanArrayRegion, 3669 jni_GetByteArrayRegion, 3670 jni_GetCharArrayRegion, 3671 jni_GetShortArrayRegion, 3672 jni_GetIntArrayRegion, 3673 jni_GetLongArrayRegion, 3674 jni_GetFloatArrayRegion, 3675 jni_GetDoubleArrayRegion, 3676 3677 jni_SetBooleanArrayRegion, 3678 jni_SetByteArrayRegion, 3679 jni_SetCharArrayRegion, 3680 jni_SetShortArrayRegion, 3681 jni_SetIntArrayRegion, 3682 jni_SetLongArrayRegion, 3683 jni_SetFloatArrayRegion, 3684 jni_SetDoubleArrayRegion, 3685 3686 jni_RegisterNatives, 3687 jni_UnregisterNatives, 3688 3689 jni_MonitorEnter, 3690 jni_MonitorExit, 3691 3692 jni_GetJavaVM, 3693 3694 jni_GetStringRegion, 3695 jni_GetStringUTFRegion, 3696 3697 jni_GetPrimitiveArrayCritical, 3698 jni_ReleasePrimitiveArrayCritical, 3699 3700 jni_GetStringCritical, 3701 jni_ReleaseStringCritical, 3702 3703 jni_NewWeakGlobalRef, 3704 jni_DeleteWeakGlobalRef, 3705 3706 jni_ExceptionCheck, 3707 3708 jni_NewDirectByteBuffer, 3709 jni_GetDirectBufferAddress, 3710 jni_GetDirectBufferCapacity, 3711 3712 // New 1_6 features 3713 3714 jni_GetObjectRefType 3715}; 3716 3717 3718// For jvmti use to modify jni function table. 3719// Java threads in native contiues to run until it is transitioned 3720// to VM at safepoint. Before the transition or before it is blocked 3721// for safepoint it may access jni function table. VM could crash if 3722// any java thread access the jni function table in the middle of memcpy. 3723// To avoid this each function pointers are copied automically. 3724void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3725 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3726 intptr_t *a = (intptr_t *) jni_functions(); 3727 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3728 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3729 Atomic::store_ptr(*b++, a++); 3730 } 3731} 3732 3733void quicken_jni_functions() { 3734 // Replace Get<Primitive>Field with fast versions 3735 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3736 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls 3737#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3738 // windows x86 currently needs SEH wrapper and the gain of the fast 3739 // versions currently isn't certain for server vm on uniprocessor. 3740 && os::is_MP() 3741#endif 3742 ) { 3743 address func; 3744 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3745 if (func != (address)-1) { 3746 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3747 } 3748 func = JNI_FastGetField::generate_fast_get_byte_field(); 3749 if (func != (address)-1) { 3750 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3751 } 3752 func = JNI_FastGetField::generate_fast_get_char_field(); 3753 if (func != (address)-1) { 3754 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3755 } 3756 func = JNI_FastGetField::generate_fast_get_short_field(); 3757 if (func != (address)-1) { 3758 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3759 } 3760 func = JNI_FastGetField::generate_fast_get_int_field(); 3761 if (func != (address)-1) { 3762 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3763 } 3764 func = JNI_FastGetField::generate_fast_get_long_field(); 3765 if (func != (address)-1) { 3766 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3767 } 3768 func = JNI_FastGetField::generate_fast_get_float_field(); 3769 if (func != (address)-1) { 3770 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3771 } 3772 func = JNI_FastGetField::generate_fast_get_double_field(); 3773 if (func != (address)-1) { 3774 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3775 } 3776 } 3777} 3778 3779// Returns the function structure 3780struct JNINativeInterface_* jni_functions() { 3781#if INCLUDE_JNI_CHECK 3782 if (CheckJNICalls) return jni_functions_check(); 3783#endif // INCLUDE_JNI_CHECK 3784 return &jni_NativeInterface; 3785} 3786 3787// Returns the function structure 3788struct JNINativeInterface_* jni_functions_nocheck() { 3789 return &jni_NativeInterface; 3790} 3791 3792 3793// Invocation API 3794 3795 3796// Forward declaration 3797extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3798 3799// Global invocation API vars 3800volatile jint vm_created = 0; 3801// Indicate whether it is safe to recreate VM 3802volatile jint safe_to_recreate_vm = 1; 3803struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3804 3805 3806#define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3807enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3808 3809DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3810 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3811 3812_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3813 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3814 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3815 jint ret = JNI_ERR; 3816 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3817 3818 if (Threads::is_supported_jni_version(args->version)) { 3819 ret = JNI_OK; 3820 } 3821 // 1.1 style no longer supported in hotspot. 3822 // According the JNI spec, we should update args->version on return. 3823 // We also use the structure to communicate with launcher about default 3824 // stack size. 3825 if (args->version == JNI_VERSION_1_1) { 3826 args->version = JNI_VERSION_1_2; 3827 // javaStackSize is int in arguments structure 3828 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3829 args->javaStackSize = (jint)(ThreadStackSize * K); 3830 } 3831 return ret; 3832} 3833 3834#ifndef PRODUCT 3835 3836#include "gc_implementation/shared/gcTimer.hpp" 3837#include "gc_interface/collectedHeap.hpp" 3838#if INCLUDE_ALL_GCS 3839#include "gc_implementation/g1/heapRegionRemSet.hpp" 3840#endif 3841#include "memory/guardedMemory.hpp" 3842#include "utilities/quickSort.hpp" 3843#include "utilities/ostream.hpp" 3844#if INCLUDE_VM_STRUCTS 3845#include "runtime/vmStructs.hpp" 3846#endif 3847 3848#define run_unit_test(unit_test_function_call) \ 3849 tty->print_cr("Running test: " #unit_test_function_call); \ 3850 unit_test_function_call 3851 3852// Forward declaration 3853void TestOS_test(); 3854void TestReservedSpace_test(); 3855void TestReserveMemorySpecial_test(); 3856void TestVirtualSpace_test(); 3857void TestMetaspaceAux_test(); 3858void TestMetachunk_test(); 3859void TestVirtualSpaceNode_test(); 3860void TestNewSize_test(); 3861void TestOldSize_test(); 3862void TestKlass_test(); 3863void TestBitMap_test(); 3864void TestAsUtf8(); 3865void Test_linked_list(); 3866void TestChunkedList_test(); 3867#if INCLUDE_ALL_GCS 3868void TestOldFreeSpaceCalculation_test(); 3869void TestG1BiasedArray_test(); 3870void TestBufferingOopClosure_test(); 3871void TestCodeCacheRemSet_test(); 3872void FreeRegionList_test(); 3873#endif 3874 3875void execute_internal_vm_tests() { 3876 if (ExecuteInternalVMTests) { 3877 tty->print_cr("Running internal VM tests"); 3878 run_unit_test(TestOS_test()); 3879 run_unit_test(TestReservedSpace_test()); 3880 run_unit_test(TestReserveMemorySpecial_test()); 3881 run_unit_test(TestVirtualSpace_test()); 3882 run_unit_test(TestMetaspaceAux_test()); 3883 run_unit_test(TestMetachunk_test()); 3884 run_unit_test(TestVirtualSpaceNode_test()); 3885 run_unit_test(GlobalDefinitions::test_globals()); 3886 run_unit_test(GCTimerAllTest::all()); 3887 run_unit_test(arrayOopDesc::test_max_array_length()); 3888 run_unit_test(CollectedHeap::test_is_in()); 3889 run_unit_test(QuickSort::test_quick_sort()); 3890 run_unit_test(GuardedMemory::test_guarded_memory()); 3891 run_unit_test(AltHashing::test_alt_hash()); 3892 run_unit_test(test_loggc_filename()); 3893 run_unit_test(TestNewSize_test()); 3894 run_unit_test(TestOldSize_test()); 3895 run_unit_test(TestKlass_test()); 3896 run_unit_test(TestBitMap_test()); 3897 run_unit_test(TestAsUtf8()); 3898 run_unit_test(ObjectMonitor::sanity_checks()); 3899 run_unit_test(Test_linked_list()); 3900 run_unit_test(TestChunkedList_test()); 3901#if INCLUDE_VM_STRUCTS 3902 run_unit_test(VMStructs::test()); 3903#endif 3904#if INCLUDE_ALL_GCS 3905 run_unit_test(TestOldFreeSpaceCalculation_test()); 3906 run_unit_test(TestG1BiasedArray_test()); 3907 run_unit_test(HeapRegionRemSet::test_prt()); 3908 run_unit_test(TestBufferingOopClosure_test()); 3909 run_unit_test(TestCodeCacheRemSet_test()); 3910 if (UseG1GC) { 3911 run_unit_test(FreeRegionList_test()); 3912 } 3913#endif 3914 tty->print_cr("All internal VM tests passed"); 3915 } 3916} 3917 3918#undef run_unit_test 3919 3920#endif 3921 3922DT_RETURN_MARK_DECL(CreateJavaVM, jint 3923 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3924 3925_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3926 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3927 3928 jint result = JNI_ERR; 3929 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3930 3931 // We're about to use Atomic::xchg for synchronization. Some Zero 3932 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3933 // but __sync_lock_test_and_set is not guaranteed to do what we want 3934 // on all architectures. So we check it works before relying on it. 3935#if defined(ZERO) && defined(ASSERT) 3936 { 3937 jint a = 0xcafebabe; 3938 jint b = Atomic::xchg(0xdeadbeef, &a); 3939 void *c = &a; 3940 void *d = Atomic::xchg_ptr(&b, &c); 3941 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3942 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3943 } 3944#endif // ZERO && ASSERT 3945 3946 // At the moment it's only possible to have one Java VM, 3947 // since some of the runtime state is in global variables. 3948 3949 // We cannot use our mutex locks here, since they only work on 3950 // Threads. We do an atomic compare and exchange to ensure only 3951 // one thread can call this method at a time 3952 3953 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3954 // the add/dec implementations are dependent on whether we are running 3955 // on a multiprocessor, and at this stage of initialization the os::is_MP 3956 // function used to determine this will always return false. Atomic::xchg 3957 // does not have this problem. 3958 if (Atomic::xchg(1, &vm_created) == 1) { 3959 return JNI_EEXIST; // already created, or create attempt in progress 3960 } 3961 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3962 return JNI_ERR; // someone tried and failed and retry not allowed. 3963 } 3964 3965 assert(vm_created == 1, "vm_created is true during the creation"); 3966 3967 /** 3968 * Certain errors during initialization are recoverable and do not 3969 * prevent this method from being called again at a later time 3970 * (perhaps with different arguments). However, at a certain 3971 * point during initialization if an error occurs we cannot allow 3972 * this function to be called again (or it will crash). In those 3973 * situations, the 'canTryAgain' flag is set to false, which atomically 3974 * sets safe_to_recreate_vm to 1, such that any new call to 3975 * JNI_CreateJavaVM will immediately fail using the above logic. 3976 */ 3977 bool can_try_again = true; 3978 3979 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3980 if (result == JNI_OK) { 3981 JavaThread *thread = JavaThread::current(); 3982 assert(!thread->has_pending_exception(), "should have returned not OK"); 3983 /* thread is thread_in_vm here */ 3984 *vm = (JavaVM *)(&main_vm); 3985 *(JNIEnv**)penv = thread->jni_environment(); 3986 3987 // Tracks the time application was running before GC 3988 RuntimeService::record_application_start(); 3989 3990 // Notify JVMTI 3991 if (JvmtiExport::should_post_thread_life()) { 3992 JvmtiExport::post_thread_start(thread); 3993 } 3994 3995 EventThreadStart event; 3996 if (event.should_commit()) { 3997 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 3998 event.commit(); 3999 } 4000 4001#ifndef PRODUCT 4002 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED 4003 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f() 4004 #endif 4005 4006 // Check if we should compile all classes on bootclasspath 4007 if (CompileTheWorld) ClassLoader::compile_the_world(); 4008 if (ReplayCompiles) ciReplay::replay(thread); 4009 4010 // Some platforms (like Win*) need a wrapper around these test 4011 // functions in order to properly handle error conditions. 4012 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler); 4013 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests); 4014#endif 4015 4016 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4017 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4018 } else { 4019 // If create_vm exits because of a pending exception, exit with that 4020 // exception. In the future when we figure out how to reclaim memory, 4021 // we may be able to exit with JNI_ERR and allow the calling application 4022 // to continue. 4023 if (Universe::is_fully_initialized()) { 4024 // otherwise no pending exception possible - VM will already have aborted 4025 JavaThread* THREAD = JavaThread::current(); 4026 if (HAS_PENDING_EXCEPTION) { 4027 HandleMark hm; 4028 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4029 } 4030 } 4031 4032 if (can_try_again) { 4033 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4034 safe_to_recreate_vm = 1; 4035 } 4036 4037 // Creation failed. We must reset vm_created 4038 *vm = 0; 4039 *(JNIEnv**)penv = 0; 4040 // reset vm_created last to avoid race condition. Use OrderAccess to 4041 // control both compiler and architectural-based reordering. 4042 OrderAccess::release_store(&vm_created, 0); 4043 } 4044 4045 return result; 4046} 4047 4048 4049_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4050 // See bug 4367188, the wrapper can sometimes cause VM crashes 4051 // JNIWrapper("GetCreatedJavaVMs"); 4052 4053 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4054 4055 if (vm_created) { 4056 if (numVMs != NULL) *numVMs = 1; 4057 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4058 } else { 4059 if (numVMs != NULL) *numVMs = 0; 4060 } 4061 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4062 return JNI_OK; 4063} 4064 4065extern "C" { 4066 4067DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4068 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4069 4070jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4071 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4072 jint res = JNI_ERR; 4073 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4074 4075 if (!vm_created) { 4076 res = JNI_ERR; 4077 return res; 4078 } 4079 4080 JNIWrapper("DestroyJavaVM"); 4081 JNIEnv *env; 4082 JavaVMAttachArgs destroyargs; 4083 destroyargs.version = CurrentVersion; 4084 destroyargs.name = (char *)"DestroyJavaVM"; 4085 destroyargs.group = NULL; 4086 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4087 if (res != JNI_OK) { 4088 return res; 4089 } 4090 4091 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4092 JavaThread* thread = JavaThread::current(); 4093 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4094 if (Threads::destroy_vm()) { 4095 // Should not change thread state, VM is gone 4096 vm_created = false; 4097 res = JNI_OK; 4098 return res; 4099 } else { 4100 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4101 res = JNI_ERR; 4102 return res; 4103 } 4104} 4105 4106 4107static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4108 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4109 4110 // Check below commented out from JDK1.2fcs as well 4111 /* 4112 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4113 return JNI_EVERSION; 4114 } 4115 */ 4116 4117 Thread* t = ThreadLocalStorage::get_thread_slow(); 4118 if (t != NULL) { 4119 // If the thread has been attached this operation is a no-op 4120 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4121 return JNI_OK; 4122 } 4123 4124 // Create a thread and mark it as attaching so it will be skipped by the 4125 // ThreadsListEnumerator - see CR 6404306 4126 JavaThread* thread = new JavaThread(true); 4127 4128 // Set correct safepoint info. The thread is going to call into Java when 4129 // initializing the Java level thread object. Hence, the correct state must 4130 // be set in order for the Safepoint code to deal with it correctly. 4131 thread->set_thread_state(_thread_in_vm); 4132 // Must do this before initialize_thread_local_storage 4133 thread->record_stack_base_and_size(); 4134 4135 thread->initialize_thread_local_storage(); 4136 4137 if (!os::create_attached_thread(thread)) { 4138 delete thread; 4139 return JNI_ERR; 4140 } 4141 // Enable stack overflow checks 4142 thread->create_stack_guard_pages(); 4143 4144 thread->initialize_tlab(); 4145 4146 thread->cache_global_variables(); 4147 4148 // Crucial that we do not have a safepoint check for this thread, since it has 4149 // not been added to the Thread list yet. 4150 { Threads_lock->lock_without_safepoint_check(); 4151 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4152 // avoid this thread trying to do a GC before it is added to the thread-list 4153 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4154 Threads::add(thread, daemon); 4155 Threads_lock->unlock(); 4156 } 4157 // Create thread group and name info from attach arguments 4158 oop group = NULL; 4159 char* thread_name = NULL; 4160 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4161 group = JNIHandles::resolve(args->group); 4162 thread_name = args->name; // may be NULL 4163 } 4164 if (group == NULL) group = Universe::main_thread_group(); 4165 4166 // Create Java level thread object and attach it to this thread 4167 bool attach_failed = false; 4168 { 4169 EXCEPTION_MARK; 4170 HandleMark hm(THREAD); 4171 Handle thread_group(THREAD, group); 4172 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4173 if (HAS_PENDING_EXCEPTION) { 4174 CLEAR_PENDING_EXCEPTION; 4175 // cleanup outside the handle mark. 4176 attach_failed = true; 4177 } 4178 } 4179 4180 if (attach_failed) { 4181 // Added missing cleanup 4182 thread->cleanup_failed_attach_current_thread(); 4183 return JNI_ERR; 4184 } 4185 4186 // mark the thread as no longer attaching 4187 // this uses a fence to push the change through so we don't have 4188 // to regrab the threads_lock 4189 thread->set_done_attaching_via_jni(); 4190 4191 // Set java thread status. 4192 java_lang_Thread::set_thread_status(thread->threadObj(), 4193 java_lang_Thread::RUNNABLE); 4194 4195 // Notify the debugger 4196 if (JvmtiExport::should_post_thread_life()) { 4197 JvmtiExport::post_thread_start(thread); 4198 } 4199 4200 EventThreadStart event; 4201 if (event.should_commit()) { 4202 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4203 event.commit(); 4204 } 4205 4206 *(JNIEnv**)penv = thread->jni_environment(); 4207 4208 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4209 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4210 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4211 // needed. 4212 4213 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4214 4215 // Perform any platform dependent FPU setup 4216 os::setup_fpu(); 4217 4218 return JNI_OK; 4219} 4220 4221 4222jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4223 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4224 if (!vm_created) { 4225 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4226 return JNI_ERR; 4227 } 4228 4229 JNIWrapper("AttachCurrentThread"); 4230 jint ret = attach_current_thread(vm, penv, _args, false); 4231 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4232 return ret; 4233} 4234 4235 4236jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4237 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4238 VM_Exit::block_if_vm_exited(); 4239 4240 JNIWrapper("DetachCurrentThread"); 4241 4242 // If the thread has been deattacted the operations is a no-op 4243 if (ThreadLocalStorage::thread() == NULL) { 4244 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4245 return JNI_OK; 4246 } 4247 4248 JavaThread* thread = JavaThread::current(); 4249 if (thread->has_last_Java_frame()) { 4250 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4251 // Can't detach a thread that's running java, that can't work. 4252 return JNI_ERR; 4253 } 4254 4255 // Safepoint support. Have to do call-back to safepoint code, if in the 4256 // middel of a safepoint operation 4257 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4258 4259 // XXX: Note that JavaThread::exit() call below removes the guards on the 4260 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4261 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4262 // of the guards is visible in jni_AttachCurrentThread above, 4263 // the removal of the guards is buried below in JavaThread::exit() 4264 // here. The abstraction should be more symmetrically either exposed 4265 // or hidden (e.g. it could probably be hidden in the same 4266 // (platform-dependent) methods where we do alternate stack 4267 // maintenance work?) 4268 thread->exit(false, JavaThread::jni_detach); 4269 delete thread; 4270 4271 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4272 return JNI_OK; 4273} 4274 4275DT_RETURN_MARK_DECL(GetEnv, jint 4276 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4277 4278jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4279 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4280 jint ret = JNI_ERR; 4281 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4282 4283 if (!vm_created) { 4284 *penv = NULL; 4285 ret = JNI_EDETACHED; 4286 return ret; 4287 } 4288 4289 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4290 return ret; 4291 } 4292 4293#ifndef JVMPI_VERSION_1 4294// need these in order to be polite about older agents 4295#define JVMPI_VERSION_1 ((jint)0x10000001) 4296#define JVMPI_VERSION_1_1 ((jint)0x10000002) 4297#define JVMPI_VERSION_1_2 ((jint)0x10000003) 4298#endif // !JVMPI_VERSION_1 4299 4300 Thread* thread = ThreadLocalStorage::thread(); 4301 if (thread != NULL && thread->is_Java_thread()) { 4302 if (Threads::is_supported_jni_version_including_1_1(version)) { 4303 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4304 ret = JNI_OK; 4305 return ret; 4306 4307 } else if (version == JVMPI_VERSION_1 || 4308 version == JVMPI_VERSION_1_1 || 4309 version == JVMPI_VERSION_1_2) { 4310 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4311 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4312 ret = JNI_EVERSION; 4313 return ret; 4314 } else if (JvmtiExport::is_jvmdi_version(version)) { 4315 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4316 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4317 ret = JNI_EVERSION; 4318 return ret; 4319 } else { 4320 *penv = NULL; 4321 ret = JNI_EVERSION; 4322 return ret; 4323 } 4324 } else { 4325 *penv = NULL; 4326 ret = JNI_EDETACHED; 4327 return ret; 4328 } 4329} 4330 4331 4332jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4333 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4334 if (!vm_created) { 4335 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4336 return JNI_ERR; 4337 } 4338 4339 JNIWrapper("AttachCurrentThreadAsDaemon"); 4340 jint ret = attach_current_thread(vm, penv, _args, true); 4341 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4342 return ret; 4343} 4344 4345 4346} // End extern "C" 4347 4348const struct JNIInvokeInterface_ jni_InvokeInterface = { 4349 NULL, 4350 NULL, 4351 NULL, 4352 4353 jni_DestroyJavaVM, 4354 jni_AttachCurrentThread, 4355 jni_DetachCurrentThread, 4356 jni_GetEnv, 4357 jni_AttachCurrentThreadAsDaemon 4358}; 4359