jni.cpp revision 6692:4f9fa4b62c18
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/runtimeService.hpp" 78#include "trace/tracing.hpp" 79#include "utilities/defaultStream.hpp" 80#include "utilities/dtrace.hpp" 81#include "utilities/events.hpp" 82#include "utilities/histogram.hpp" 83 84static jint CurrentVersion = JNI_VERSION_1_8; 85 86 87// The DT_RETURN_MARK macros create a scoped object to fire the dtrace 88// '-return' probe regardless of the return path is taken out of the function. 89// Methods that have multiple return paths use this to avoid having to 90// instrument each return path. Methods that use CHECK or THROW must use this 91// since those macros can cause an immedate uninstrumented return. 92// 93// In order to get the return value, a reference to the variable containing 94// the return value must be passed to the contructor of the object, and 95// the return value must be set before return (since the mark object has 96// a reference to it). 97// 98// Example: 99// DT_RETURN_MARK_DECL(SomeFunc, int); 100// JNI_ENTRY(int, SomeFunc, ...) 101// int return_value = 0; 102// DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 103// foo(CHECK_0) 104// return_value = 5; 105// return return_value; 106// JNI_END 107#define DT_RETURN_MARK_DECL(name, type, probe) \ 108 DTRACE_ONLY( \ 109 class DTraceReturnProbeMark_##name { \ 110 public: \ 111 const type& _ret_ref; \ 112 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 113 ~DTraceReturnProbeMark_##name() { \ 114 probe; \ 115 } \ 116 } \ 117 ) 118// Void functions are simpler since there's no return value 119#define DT_VOID_RETURN_MARK_DECL(name, probe) \ 120 DTRACE_ONLY( \ 121 class DTraceReturnProbeMark_##name { \ 122 public: \ 123 ~DTraceReturnProbeMark_##name() { \ 124 probe; \ 125 } \ 126 } \ 127 ) 128 129// Place these macros in the function to mark the return. Non-void 130// functions need the type and address of the return value. 131#define DT_RETURN_MARK(name, type, ref) \ 132 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 133#define DT_VOID_RETURN_MARK(name) \ 134 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 135 136 137// Use these to select distinct code for floating-point vs. non-floating point 138// situations. Used from within common macros where we need slightly 139// different behavior for Float/Double 140#define FP_SELECT_Boolean(intcode, fpcode) intcode 141#define FP_SELECT_Byte(intcode, fpcode) intcode 142#define FP_SELECT_Char(intcode, fpcode) intcode 143#define FP_SELECT_Short(intcode, fpcode) intcode 144#define FP_SELECT_Object(intcode, fpcode) intcode 145#define FP_SELECT_Int(intcode, fpcode) intcode 146#define FP_SELECT_Long(intcode, fpcode) intcode 147#define FP_SELECT_Float(intcode, fpcode) fpcode 148#define FP_SELECT_Double(intcode, fpcode) fpcode 149#define FP_SELECT(TypeName, intcode, fpcode) \ 150 FP_SELECT_##TypeName(intcode, fpcode) 151 152#define COMMA , 153 154// Choose DT_RETURN_MARK macros based on the type: float/double -> void 155// (dtrace doesn't do FP yet) 156#define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 157 FP_SELECT(TypeName, \ 158 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 159#define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 160 FP_SELECT(TypeName, \ 161 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 162 163 164// out-of-line helpers for class jfieldIDWorkaround: 165 166bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 167 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 168 uintptr_t as_uint = (uintptr_t) id; 169 intptr_t offset = raw_instance_offset(id); 170 if (is_checked_jfieldID(id)) { 171 if (!klass_hash_ok(k, id)) { 172 return false; 173 } 174 } 175 return InstanceKlass::cast(k)->contains_field_offset(offset); 176 } else { 177 JNIid* result = (JNIid*) id; 178#ifdef ASSERT 179 return result != NULL && result->is_static_field_id(); 180#else 181 return result != NULL; 182#endif 183 } 184} 185 186 187intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 188 if (offset <= small_offset_mask) { 189 Klass* field_klass = k; 190 Klass* super_klass = field_klass->super(); 191 // With compressed oops the most super class with nonstatic fields would 192 // be the owner of fields embedded in the header. 193 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 194 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 195 field_klass = super_klass; // super contains the field also 196 super_klass = field_klass->super(); 197 } 198 debug_only(No_Safepoint_Verifier nosafepoint;) 199 uintptr_t klass_hash = field_klass->identity_hash(); 200 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 201 } else { 202#if 0 203 #ifndef PRODUCT 204 { 205 ResourceMark rm; 206 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 207 } 208 #endif 209#endif 210 return 0; 211 } 212} 213 214bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 215 uintptr_t as_uint = (uintptr_t) id; 216 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 217 do { 218 debug_only(No_Safepoint_Verifier nosafepoint;) 219 // Could use a non-blocking query for identity_hash here... 220 if ((k->identity_hash() & klass_mask) == klass_hash) 221 return true; 222 k = k->super(); 223 } while (k != NULL); 224 return false; 225} 226 227void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 228 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 229 uintptr_t as_uint = (uintptr_t) id; 230 intptr_t offset = raw_instance_offset(id); 231 if (VerifyJNIFields) { 232 if (is_checked_jfieldID(id)) { 233 guarantee(klass_hash_ok(k, id), 234 "Bug in native code: jfieldID class must match object"); 235 } else { 236#if 0 237 #ifndef PRODUCT 238 if (Verbose) { 239 ResourceMark rm; 240 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 241 } 242 #endif 243#endif 244 } 245 } 246 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 247 "Bug in native code: jfieldID offset must address interior of object"); 248} 249 250// Pick a reasonable higher bound for local capacity requested 251// for EnsureLocalCapacity and PushLocalFrame. We don't want it too 252// high because a test (or very unusual application) may try to allocate 253// that many handles and run out of swap space. An implementation is 254// permitted to allocate more handles than the ensured capacity, so this 255// value is set high enough to prevent compatibility problems. 256const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; 257 258 259// Wrapper to trace JNI functions 260 261#ifdef ASSERT 262 Histogram* JNIHistogram; 263 static volatile jint JNIHistogram_lock = 0; 264 265 class JNITraceWrapper : public StackObj { 266 public: 267 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { 268 if (TraceJNICalls) { 269 va_list ap; 270 va_start(ap, format); 271 tty->print("JNI "); 272 tty->vprint_cr(format, ap); 273 va_end(ap); 274 } 275 } 276 }; 277 278 class JNIHistogramElement : public HistogramElement { 279 public: 280 JNIHistogramElement(const char* name); 281 }; 282 283 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 284 _name = elementName; 285 uintx count = 0; 286 287 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 288 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 289 count +=1; 290 if ( (WarnOnStalledSpinLock > 0) 291 && (count % WarnOnStalledSpinLock == 0)) { 292 warning("JNIHistogram_lock seems to be stalled"); 293 } 294 } 295 } 296 297 298 if(JNIHistogram == NULL) 299 JNIHistogram = new Histogram("JNI Call Counts",100); 300 301 JNIHistogram->add_element(this); 302 Atomic::dec(&JNIHistogram_lock); 303 } 304 305 #define JNICountWrapper(arg) \ 306 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 307 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 308 if (e != NULL) e->increment_count() 309 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) 310#else 311 #define JNIWrapper(arg) 312#endif 313 314 315// Implementation of JNI entries 316 317DT_RETURN_MARK_DECL(DefineClass, jclass 318 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 319 320JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 321 const jbyte *buf, jsize bufLen)) 322 JNIWrapper("DefineClass"); 323 324 HOTSPOT_JNI_DEFINECLASS_ENTRY( 325 env, (char*) name, loaderRef, (char*) buf, bufLen); 326 327 jclass cls = NULL; 328 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 329 330 TempNewSymbol class_name = NULL; 331 // Since exceptions can be thrown, class initialization can take place 332 // if name is NULL no check for class name in .class stream has to be made. 333 if (name != NULL) { 334 const int str_len = (int)strlen(name); 335 if (str_len > Symbol::max_length()) { 336 // It's impossible to create this class; the name cannot fit 337 // into the constant pool. 338 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 339 } 340 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 341 } 342 ResourceMark rm(THREAD); 343 ClassFileStream st((u1*) buf, bufLen, NULL); 344 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 345 346 if (UsePerfData && !class_loader.is_null()) { 347 // check whether the current caller thread holds the lock or not. 348 // If not, increment the corresponding counter 349 if (ObjectSynchronizer:: 350 query_lock_ownership((JavaThread*)THREAD, class_loader) != 351 ObjectSynchronizer::owner_self) { 352 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 353 } 354 } 355 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 356 Handle(), &st, true, 357 CHECK_NULL); 358 359 if (TraceClassResolution && k != NULL) { 360 trace_class_resolution(k); 361 } 362 363 cls = (jclass)JNIHandles::make_local( 364 env, k->java_mirror()); 365 return cls; 366JNI_END 367 368 369 370static bool first_time_FindClass = true; 371 372DT_RETURN_MARK_DECL(FindClass, jclass 373 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 374 375JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 376 JNIWrapper("FindClass"); 377 378 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 379 380 jclass result = NULL; 381 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 382 383 // Remember if we are the first invocation of jni_FindClass 384 bool first_time = first_time_FindClass; 385 first_time_FindClass = false; 386 387 // Sanity check the name: it cannot be null or larger than the maximum size 388 // name we can fit in the constant pool. 389 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 390 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 391 } 392 393 //%note jni_3 394 Handle loader; 395 Handle protection_domain; 396 // Find calling class 397 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 398 if (k.not_null()) { 399 loader = Handle(THREAD, k->class_loader()); 400 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 401 // in the correct class context. 402 if (loader.is_null() && 403 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 404 JavaValue result(T_OBJECT); 405 JavaCalls::call_static(&result, k, 406 vmSymbols::getFromClass_name(), 407 vmSymbols::void_class_signature(), 408 thread); 409 if (HAS_PENDING_EXCEPTION) { 410 Handle ex(thread, thread->pending_exception()); 411 CLEAR_PENDING_EXCEPTION; 412 THROW_HANDLE_0(ex); 413 } 414 oop mirror = (oop) result.get_jobject(); 415 loader = Handle(THREAD, 416 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 417 protection_domain = Handle(THREAD, 418 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 419 } 420 } else { 421 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 422 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 423 } 424 425 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 426 result = find_class_from_class_loader(env, sym, true, loader, 427 protection_domain, true, thread); 428 429 if (TraceClassResolution && result != NULL) { 430 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 431 } 432 433 // If we were the first invocation of jni_FindClass, we enable compilation again 434 // rather than just allowing invocation counter to overflow and decay. 435 // Controlled by flag DelayCompilationDuringStartup. 436 if (first_time && !CompileTheWorld) 437 CompilationPolicy::completed_vm_startup(); 438 439 return result; 440JNI_END 441 442DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 443 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 444 445JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 446 JNIWrapper("FromReflectedMethod"); 447 448 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 449 450 jmethodID ret = NULL; 451 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 452 453 // method is a handle to a java.lang.reflect.Method object 454 oop reflected = JNIHandles::resolve_non_null(method); 455 oop mirror = NULL; 456 int slot = 0; 457 458 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 459 mirror = java_lang_reflect_Constructor::clazz(reflected); 460 slot = java_lang_reflect_Constructor::slot(reflected); 461 } else { 462 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 463 mirror = java_lang_reflect_Method::clazz(reflected); 464 slot = java_lang_reflect_Method::slot(reflected); 465 } 466 Klass* k = java_lang_Class::as_Klass(mirror); 467 468 KlassHandle k1(THREAD, k); 469 // Make sure class is initialized before handing id's out to methods 470 k1()->initialize(CHECK_NULL); 471 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 472 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 473 return ret; 474JNI_END 475 476DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 477 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 478 479JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 480 JNIWrapper("FromReflectedField"); 481 482 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 483 484 jfieldID ret = NULL; 485 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 486 487 // field is a handle to a java.lang.reflect.Field object 488 oop reflected = JNIHandles::resolve_non_null(field); 489 oop mirror = java_lang_reflect_Field::clazz(reflected); 490 Klass* k = java_lang_Class::as_Klass(mirror); 491 int slot = java_lang_reflect_Field::slot(reflected); 492 int modifiers = java_lang_reflect_Field::modifiers(reflected); 493 494 KlassHandle k1(THREAD, k); 495 // Make sure class is initialized before handing id's out to fields 496 k1()->initialize(CHECK_NULL); 497 498 // First check if this is a static field 499 if (modifiers & JVM_ACC_STATIC) { 500 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 501 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 502 assert(id != NULL, "corrupt Field object"); 503 debug_only(id->set_is_static_field_id();) 504 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 505 ret = jfieldIDWorkaround::to_static_jfieldID(id); 506 return ret; 507 } 508 509 // The slot is the index of the field description in the field-array 510 // The jfieldID is the offset of the field within the object 511 // It may also have hash bits for k, if VerifyJNIFields is turned on. 512 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 513 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 514 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 515 return ret; 516JNI_END 517 518 519DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 520 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 521 522JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 523 JNIWrapper("ToReflectedMethod"); 524 525 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 526 527 jobject ret = NULL; 528 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 529 530 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 531 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 532 oop reflection_method; 533 if (m->is_initializer()) { 534 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 535 } else { 536 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 537 } 538 ret = JNIHandles::make_local(env, reflection_method); 539 return ret; 540JNI_END 541 542DT_RETURN_MARK_DECL(GetSuperclass, jclass 543 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 544 545JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 546 JNIWrapper("GetSuperclass"); 547 548 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 549 550 jclass obj = NULL; 551 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 552 553 oop mirror = JNIHandles::resolve_non_null(sub); 554 // primitive classes return NULL 555 if (java_lang_Class::is_primitive(mirror)) return NULL; 556 557 // Rules of Class.getSuperClass as implemented by KLass::java_super: 558 // arrays return Object 559 // interfaces return NULL 560 // proper classes return Klass::super() 561 Klass* k = java_lang_Class::as_Klass(mirror); 562 if (k->is_interface()) return NULL; 563 564 // return mirror for superclass 565 Klass* super = k->java_super(); 566 // super2 is the value computed by the compiler's getSuperClass intrinsic: 567 debug_only(Klass* super2 = ( k->oop_is_array() 568 ? SystemDictionary::Object_klass() 569 : k->super() ) ); 570 assert(super == super2, 571 "java_super computation depends on interface, array, other super"); 572 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 573 return obj; 574JNI_END 575 576JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 577 JNIWrapper("IsSubclassOf"); 578 579 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 580 581 oop sub_mirror = JNIHandles::resolve_non_null(sub); 582 oop super_mirror = JNIHandles::resolve_non_null(super); 583 if (java_lang_Class::is_primitive(sub_mirror) || 584 java_lang_Class::is_primitive(super_mirror)) { 585 jboolean ret = (sub_mirror == super_mirror); 586 587 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 588 return ret; 589 } 590 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 591 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 592 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 593 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 594 JNI_TRUE : JNI_FALSE; 595 596 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 597 return ret; 598JNI_END 599 600 601DT_RETURN_MARK_DECL(Throw, jint 602 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 603 604JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 605 JNIWrapper("Throw"); 606 607 HOTSPOT_JNI_THROW_ENTRY(env, obj); 608 609 jint ret = JNI_OK; 610 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 611 612 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 613 ShouldNotReachHere(); 614JNI_END 615 616 617DT_RETURN_MARK_DECL(ThrowNew, jint 618 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 619 620JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 621 JNIWrapper("ThrowNew"); 622 623 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 624 625 jint ret = JNI_OK; 626 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 627 628 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 629 Symbol* name = k->name(); 630 Handle class_loader (THREAD, k->class_loader()); 631 Handle protection_domain (THREAD, k->protection_domain()); 632 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 633 ShouldNotReachHere(); 634JNI_END 635 636 637// JNI functions only transform a pending async exception to a synchronous 638// exception in ExceptionOccurred and ExceptionCheck calls, since 639// delivering an async exception in other places won't change the native 640// code's control flow and would be harmful when native code further calls 641// JNI functions with a pending exception. Async exception is also checked 642// during the call, so ExceptionOccurred/ExceptionCheck won't return 643// false but deliver the async exception at the very end during 644// state transition. 645 646static void jni_check_async_exceptions(JavaThread *thread) { 647 assert(thread == Thread::current(), "must be itself"); 648 thread->check_and_handle_async_exceptions(); 649} 650 651JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 652 JNIWrapper("ExceptionOccurred"); 653 654 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 655 656 jni_check_async_exceptions(thread); 657 oop exception = thread->pending_exception(); 658 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 659 660 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 661 return ret; 662JNI_END 663 664 665JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 666 JNIWrapper("ExceptionDescribe"); 667 668 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 669 670 if (thread->has_pending_exception()) { 671 Handle ex(thread, thread->pending_exception()); 672 thread->clear_pending_exception(); 673 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 674 // Don't print anything if we are being killed. 675 } else { 676 jio_fprintf(defaultStream::error_stream(), "Exception "); 677 if (thread != NULL && thread->threadObj() != NULL) { 678 ResourceMark rm(THREAD); 679 jio_fprintf(defaultStream::error_stream(), 680 "in thread \"%s\" ", thread->get_thread_name()); 681 } 682 if (ex->is_a(SystemDictionary::Throwable_klass())) { 683 JavaValue result(T_VOID); 684 JavaCalls::call_virtual(&result, 685 ex, 686 KlassHandle(THREAD, 687 SystemDictionary::Throwable_klass()), 688 vmSymbols::printStackTrace_name(), 689 vmSymbols::void_method_signature(), 690 THREAD); 691 // If an exception is thrown in the call it gets thrown away. Not much 692 // we can do with it. The native code that calls this, does not check 693 // for the exception - hence, it might still be in the thread when DestroyVM gets 694 // called, potentially causing a few asserts to trigger - since no pending exception 695 // is expected. 696 CLEAR_PENDING_EXCEPTION; 697 } else { 698 ResourceMark rm(THREAD); 699 jio_fprintf(defaultStream::error_stream(), 700 ". Uncaught exception of type %s.", 701 ex->klass()->external_name()); 702 } 703 } 704 } 705 706 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 707JNI_END 708 709 710JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 711 JNIWrapper("ExceptionClear"); 712 713 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 714 715 // The jni code might be using this API to clear java thrown exception. 716 // So just mark jvmti thread exception state as exception caught. 717 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 718 if (state != NULL && state->is_exception_detected()) { 719 state->set_exception_caught(); 720 } 721 thread->clear_pending_exception(); 722 723 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 724JNI_END 725 726 727JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 728 JNIWrapper("FatalError"); 729 730 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 731 732 tty->print_cr("FATAL ERROR in native method: %s", msg); 733 thread->print_stack(); 734 os::abort(); // Dump core and abort 735JNI_END 736 737 738JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 739 JNIWrapper("PushLocalFrame"); 740 741 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 742 743 //%note jni_11 744 if (capacity < 0 || capacity > MAX_REASONABLE_LOCAL_CAPACITY) { 745 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 746 return JNI_ERR; 747 } 748 JNIHandleBlock* old_handles = thread->active_handles(); 749 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 750 assert(new_handles != NULL, "should not be NULL"); 751 new_handles->set_pop_frame_link(old_handles); 752 thread->set_active_handles(new_handles); 753 jint ret = JNI_OK; 754 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 755 return ret; 756JNI_END 757 758 759JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 760 JNIWrapper("PopLocalFrame"); 761 762 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 763 764 //%note jni_11 765 Handle result_handle(thread, JNIHandles::resolve(result)); 766 JNIHandleBlock* old_handles = thread->active_handles(); 767 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 768 if (new_handles != NULL) { 769 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 770 // This way code will still work if PopLocalFrame is called without a corresponding 771 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 772 // the release_block call will release the blocks. 773 thread->set_active_handles(new_handles); 774 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 775 JNIHandleBlock::release_block(old_handles, thread); // may block 776 result = JNIHandles::make_local(thread, result_handle()); 777 } 778 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 779 return result; 780JNI_END 781 782 783JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 784 JNIWrapper("NewGlobalRef"); 785 786 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 787 788 Handle ref_handle(thread, JNIHandles::resolve(ref)); 789 jobject ret = JNIHandles::make_global(ref_handle); 790 791 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 792 return ret; 793JNI_END 794 795// Must be JNI_ENTRY (with HandleMark) 796JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 797 JNIWrapper("DeleteGlobalRef"); 798 799 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 800 801 JNIHandles::destroy_global(ref); 802 803 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 804JNI_END 805 806JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 807 JNIWrapper("DeleteLocalRef"); 808 809 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 810 811 JNIHandles::destroy_local(obj); 812 813 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 814JNI_END 815 816JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 817 JNIWrapper("IsSameObject"); 818 819 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 820 821 oop a = JNIHandles::resolve(r1); 822 oop b = JNIHandles::resolve(r2); 823 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 824 825 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 826 return ret; 827JNI_END 828 829 830JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 831 JNIWrapper("NewLocalRef"); 832 833 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 834 835 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 836 837 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 838 return ret; 839JNI_END 840 841JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 842 JNIWrapper("EnsureLocalCapacity"); 843 844 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 845 846 jint ret; 847 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { 848 ret = JNI_OK; 849 } else { 850 ret = JNI_ERR; 851 } 852 853 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 854 return ret; 855JNI_END 856 857// Return the Handle Type 858JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 859 JNIWrapper("GetObjectRefType"); 860 861 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 862 863 jobjectRefType ret; 864 if (JNIHandles::is_local_handle(thread, obj) || 865 JNIHandles::is_frame_handle(thread, obj)) 866 ret = JNILocalRefType; 867 else if (JNIHandles::is_global_handle(obj)) 868 ret = JNIGlobalRefType; 869 else if (JNIHandles::is_weak_global_handle(obj)) 870 ret = JNIWeakGlobalRefType; 871 else 872 ret = JNIInvalidRefType; 873 874 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 875 return ret; 876JNI_END 877 878 879class JNI_ArgumentPusher : public SignatureIterator { 880 protected: 881 JavaCallArguments* _arguments; 882 883 virtual void get_bool () = 0; 884 virtual void get_char () = 0; 885 virtual void get_short () = 0; 886 virtual void get_byte () = 0; 887 virtual void get_int () = 0; 888 virtual void get_long () = 0; 889 virtual void get_float () = 0; 890 virtual void get_double () = 0; 891 virtual void get_object () = 0; 892 893 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 894 this->_return_type = T_ILLEGAL; 895 _arguments = NULL; 896 } 897 898 public: 899 virtual void iterate( uint64_t fingerprint ) = 0; 900 901 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 902 903 inline void do_bool() { if (!is_return_type()) get_bool(); } 904 inline void do_char() { if (!is_return_type()) get_char(); } 905 inline void do_short() { if (!is_return_type()) get_short(); } 906 inline void do_byte() { if (!is_return_type()) get_byte(); } 907 inline void do_int() { if (!is_return_type()) get_int(); } 908 inline void do_long() { if (!is_return_type()) get_long(); } 909 inline void do_float() { if (!is_return_type()) get_float(); } 910 inline void do_double() { if (!is_return_type()) get_double(); } 911 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 912 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 913 inline void do_void() { } 914 915 JavaCallArguments* arguments() { return _arguments; } 916 void push_receiver(Handle h) { _arguments->push_oop(h); } 917}; 918 919 920class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 921 protected: 922 va_list _ap; 923 924 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg 925 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 926 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 927 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 928 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 929 930 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 931 932 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 933 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 934 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 935 inline void get_object() { jobject l = va_arg(_ap, jobject); 936 _arguments->push_oop(Handle((oop *)l, false)); } 937 938 inline void set_ap(va_list rap) { 939#ifdef va_copy 940 va_copy(_ap, rap); 941#elif defined (__va_copy) 942 __va_copy(_ap, rap); 943#else 944 _ap = rap; 945#endif 946 } 947 948 public: 949 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 950 : JNI_ArgumentPusher(signature) { 951 set_ap(rap); 952 } 953 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 954 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 955 set_ap(rap); 956 } 957 958 // Optimized path if we have the bitvector form of signature 959 void iterate( uint64_t fingerprint ) { 960 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments 961 else { 962 _return_type = (BasicType)((fingerprint >> static_feature_size) & 963 result_feature_mask); 964 965 assert(fingerprint, "Fingerprint should not be 0"); 966 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 967 while ( 1 ) { 968 switch ( fingerprint & parameter_feature_mask ) { 969 case bool_parm: 970 case char_parm: 971 case short_parm: 972 case byte_parm: 973 case int_parm: 974 get_int(); 975 break; 976 case obj_parm: 977 get_object(); 978 break; 979 case long_parm: 980 get_long(); 981 break; 982 case float_parm: 983 get_float(); 984 break; 985 case double_parm: 986 get_double(); 987 break; 988 case done_parm: 989 return; 990 break; 991 default: 992 ShouldNotReachHere(); 993 break; 994 } 995 fingerprint >>= parameter_feature_size; 996 } 997 } 998 } 999}; 1000 1001 1002class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1003 protected: 1004 const jvalue *_ap; 1005 1006 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } 1007 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1008 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1009 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1010 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1011 1012 inline void get_long() { _arguments->push_long((_ap++)->j); } 1013 inline void get_float() { _arguments->push_float((_ap++)->f); } 1014 inline void get_double() { _arguments->push_double((_ap++)->d);} 1015 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1016 1017 inline void set_ap(const jvalue *rap) { _ap = rap; } 1018 1019 public: 1020 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1021 : JNI_ArgumentPusher(signature) { 1022 set_ap(rap); 1023 } 1024 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1025 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1026 set_ap(rap); 1027 } 1028 1029 // Optimized path if we have the bitvector form of signature 1030 void iterate( uint64_t fingerprint ) { 1031 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments 1032 else { 1033 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1034 result_feature_mask); 1035 assert(fingerprint, "Fingerprint should not be 0"); 1036 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1037 while ( 1 ) { 1038 switch ( fingerprint & parameter_feature_mask ) { 1039 case bool_parm: 1040 get_bool(); 1041 break; 1042 case char_parm: 1043 get_char(); 1044 break; 1045 case short_parm: 1046 get_short(); 1047 break; 1048 case byte_parm: 1049 get_byte(); 1050 break; 1051 case int_parm: 1052 get_int(); 1053 break; 1054 case obj_parm: 1055 get_object(); 1056 break; 1057 case long_parm: 1058 get_long(); 1059 break; 1060 case float_parm: 1061 get_float(); 1062 break; 1063 case double_parm: 1064 get_double(); 1065 break; 1066 case done_parm: 1067 return; 1068 break; 1069 default: 1070 ShouldNotReachHere(); 1071 break; 1072 } 1073 fingerprint >>= parameter_feature_size; 1074 } 1075 } 1076 } 1077}; 1078 1079 1080enum JNICallType { 1081 JNI_STATIC, 1082 JNI_VIRTUAL, 1083 JNI_NONVIRTUAL 1084}; 1085 1086 1087 1088static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1089 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1090 1091 // Create object to hold arguments for the JavaCall, and associate it with 1092 // the jni parser 1093 ResourceMark rm(THREAD); 1094 int number_of_parameters = method->size_of_parameters(); 1095 JavaCallArguments java_args(number_of_parameters); 1096 args->set_java_argument_object(&java_args); 1097 1098 assert(method->is_static(), "method should be static"); 1099 1100 // Fill out JavaCallArguments object 1101 args->iterate( Fingerprinter(method).fingerprint() ); 1102 // Initialize result type 1103 result->set_type(args->get_ret_type()); 1104 1105 // Invoke the method. Result is returned as oop. 1106 JavaCalls::call(result, method, &java_args, CHECK); 1107 1108 // Convert result 1109 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1110 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1111 } 1112} 1113 1114 1115static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1116 oop recv = JNIHandles::resolve(receiver); 1117 if (recv == NULL) { 1118 THROW(vmSymbols::java_lang_NullPointerException()); 1119 } 1120 Handle h_recv(THREAD, recv); 1121 1122 int number_of_parameters; 1123 Method* selected_method; 1124 { 1125 Method* m = Method::resolve_jmethod_id(method_id); 1126 number_of_parameters = m->size_of_parameters(); 1127 Klass* holder = m->method_holder(); 1128 if (!(holder)->is_interface()) { 1129 // non-interface call -- for that little speed boost, don't handlize 1130 debug_only(No_Safepoint_Verifier nosafepoint;) 1131 if (call_type == JNI_VIRTUAL) { 1132 // jni_GetMethodID makes sure class is linked and initialized 1133 // so m should have a valid vtable index. 1134 assert(!m->has_itable_index(), ""); 1135 int vtbl_index = m->vtable_index(); 1136 if (vtbl_index != Method::nonvirtual_vtable_index) { 1137 Klass* k = h_recv->klass(); 1138 // k might be an arrayKlassOop but all vtables start at 1139 // the same place. The cast is to avoid virtual call and assertion. 1140 InstanceKlass *ik = (InstanceKlass*)k; 1141 selected_method = ik->method_at_vtable(vtbl_index); 1142 } else { 1143 // final method 1144 selected_method = m; 1145 } 1146 } else { 1147 // JNI_NONVIRTUAL call 1148 selected_method = m; 1149 } 1150 } else { 1151 // interface call 1152 KlassHandle h_holder(THREAD, holder); 1153 1154 if (call_type == JNI_VIRTUAL) { 1155 int itbl_index = m->itable_index(); 1156 Klass* k = h_recv->klass(); 1157 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1158 } else { 1159 selected_method = m; 1160 } 1161 } 1162 } 1163 1164 methodHandle method(THREAD, selected_method); 1165 1166 // Create object to hold arguments for the JavaCall, and associate it with 1167 // the jni parser 1168 ResourceMark rm(THREAD); 1169 JavaCallArguments java_args(number_of_parameters); 1170 args->set_java_argument_object(&java_args); 1171 1172 // handle arguments 1173 assert(!method->is_static(), "method should not be static"); 1174 args->push_receiver(h_recv); // Push jobject handle 1175 1176 // Fill out JavaCallArguments object 1177 args->iterate( Fingerprinter(method).fingerprint() ); 1178 // Initialize result type 1179 result->set_type(args->get_ret_type()); 1180 1181 // Invoke the method. Result is returned as oop. 1182 JavaCalls::call(result, method, &java_args, CHECK); 1183 1184 // Convert result 1185 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1186 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1187 } 1188} 1189 1190 1191static instanceOop alloc_object(jclass clazz, TRAPS) { 1192 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1193 if (k == NULL) { 1194 ResourceMark rm(THREAD); 1195 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1196 } 1197 k()->check_valid_for_instantiation(false, CHECK_NULL); 1198 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1199 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1200 return ih; 1201} 1202 1203DT_RETURN_MARK_DECL(AllocObject, jobject 1204 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1205 1206JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1207 JNIWrapper("AllocObject"); 1208 1209 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1210 1211 jobject ret = NULL; 1212 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1213 1214 instanceOop i = alloc_object(clazz, CHECK_NULL); 1215 ret = JNIHandles::make_local(env, i); 1216 return ret; 1217JNI_END 1218 1219DT_RETURN_MARK_DECL(NewObjectA, jobject 1220 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1221 1222JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1223 JNIWrapper("NewObjectA"); 1224 1225 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1226 1227 jobject obj = NULL; 1228 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1229 1230 instanceOop i = alloc_object(clazz, CHECK_NULL); 1231 obj = JNIHandles::make_local(env, i); 1232 JavaValue jvalue(T_VOID); 1233 JNI_ArgumentPusherArray ap(methodID, args); 1234 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1235 return obj; 1236JNI_END 1237 1238 1239DT_RETURN_MARK_DECL(NewObjectV, jobject 1240 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1241 1242JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1243 JNIWrapper("NewObjectV"); 1244 1245 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1246 1247 jobject obj = NULL; 1248 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1249 1250 instanceOop i = alloc_object(clazz, CHECK_NULL); 1251 obj = JNIHandles::make_local(env, i); 1252 JavaValue jvalue(T_VOID); 1253 JNI_ArgumentPusherVaArg ap(methodID, args); 1254 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1255 return obj; 1256JNI_END 1257 1258 1259DT_RETURN_MARK_DECL(NewObject, jobject 1260 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1261 1262JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1263 JNIWrapper("NewObject"); 1264 1265 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1266 1267 jobject obj = NULL; 1268 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1269 1270 instanceOop i = alloc_object(clazz, CHECK_NULL); 1271 obj = JNIHandles::make_local(env, i); 1272 va_list args; 1273 va_start(args, methodID); 1274 JavaValue jvalue(T_VOID); 1275 JNI_ArgumentPusherVaArg ap(methodID, args); 1276 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1277 va_end(args); 1278 return obj; 1279JNI_END 1280 1281 1282JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1283 JNIWrapper("GetObjectClass"); 1284 1285 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1286 1287 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1288 jclass ret = 1289 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1290 1291 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1292 return ret; 1293JNI_END 1294 1295JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1296 JNIWrapper("IsInstanceOf"); 1297 1298 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1299 1300 jboolean ret = JNI_TRUE; 1301 if (obj != NULL) { 1302 ret = JNI_FALSE; 1303 Klass* k = java_lang_Class::as_Klass( 1304 JNIHandles::resolve_non_null(clazz)); 1305 if (k != NULL) { 1306 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1307 } 1308 } 1309 1310 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1311 return ret; 1312JNI_END 1313 1314 1315static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1316 const char *sig, bool is_static, TRAPS) { 1317 // %%%% This code should probably just call into a method in the LinkResolver 1318 // 1319 // The class should have been loaded (we have an instance of the class 1320 // passed in) so the method and signature should already be in the symbol 1321 // table. If they're not there, the method doesn't exist. 1322 const char *name_to_probe = (name_str == NULL) 1323 ? vmSymbols::object_initializer_name()->as_C_string() 1324 : name_str; 1325 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1326 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1327 1328 if (name == NULL || signature == NULL) { 1329 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1330 } 1331 1332 // Throw a NoSuchMethodError exception if we have an instance of a 1333 // primitive java.lang.Class 1334 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1335 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1336 } 1337 1338 KlassHandle klass(THREAD, 1339 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1340 1341 // Make sure class is linked and initialized before handing id's out to 1342 // Method*s. 1343 klass()->initialize(CHECK_NULL); 1344 1345 Method* m; 1346 if (name == vmSymbols::object_initializer_name() || 1347 name == vmSymbols::class_initializer_name()) { 1348 // Never search superclasses for constructors 1349 if (klass->oop_is_instance()) { 1350 m = InstanceKlass::cast(klass())->find_method(name, signature); 1351 } else { 1352 m = NULL; 1353 } 1354 } else { 1355 m = klass->lookup_method(name, signature); 1356 if (m == NULL && klass->oop_is_instance()) { 1357 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1358 } 1359 } 1360 if (m == NULL || (m->is_static() != is_static)) { 1361 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1362 } 1363 return m->jmethod_id(); 1364} 1365 1366 1367JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1368 const char *name, const char *sig)) 1369 JNIWrapper("GetMethodID"); 1370 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1371 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1372 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1373 return ret; 1374JNI_END 1375 1376 1377JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1378 const char *name, const char *sig)) 1379 JNIWrapper("GetStaticMethodID"); 1380 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1381 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1382 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1383 return ret; 1384JNI_END 1385 1386 1387 1388// 1389// Calling Methods 1390// 1391 1392 1393#define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1394 , EntryProbe, ReturnProbe) \ 1395\ 1396 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1397 , ReturnProbe); \ 1398\ 1399JNI_ENTRY(ResultType, \ 1400 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1401 JNIWrapper("Call" XSTR(Result) "Method"); \ 1402\ 1403 EntryProbe; \ 1404 ResultType ret = 0;\ 1405 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1406 (const ResultType&)ret);\ 1407\ 1408 va_list args; \ 1409 va_start(args, methodID); \ 1410 JavaValue jvalue(Tag); \ 1411 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1412 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1413 va_end(args); \ 1414 ret = jvalue.get_##ResultType(); \ 1415 return ret;\ 1416JNI_END 1417 1418// the runtime type of subword integral basic types is integer 1419DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1420 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1421 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1422DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1423 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1425DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1426 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1428DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1429 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1431 1432DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1433 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1434 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1435DEFINE_CALLMETHOD(jint, Int, T_INT, 1436 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1438DEFINE_CALLMETHOD(jlong, Long, T_LONG 1439 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1441// Float and double probes don't return value because dtrace doesn't currently support it 1442DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1443 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1444 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1445DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1446 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1447 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1448 1449#define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1450 , EntryProbe, ReturnProbe) \ 1451\ 1452 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1453 , ReturnProbe); \ 1454\ 1455JNI_ENTRY(ResultType, \ 1456 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1457 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1458\ 1459 EntryProbe;\ 1460 ResultType ret = 0;\ 1461 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1462 (const ResultType&)ret);\ 1463\ 1464 JavaValue jvalue(Tag); \ 1465 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1466 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1467 ret = jvalue.get_##ResultType(); \ 1468 return ret;\ 1469JNI_END 1470 1471// the runtime type of subword integral basic types is integer 1472DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1473 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1474 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1475DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1476 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1478DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1479 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1481DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1482 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1484 1485DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1486 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1487 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1488DEFINE_CALLMETHODV(jint, Int, T_INT, 1489 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1491DEFINE_CALLMETHODV(jlong, Long, T_LONG 1492 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1494// Float and double probes don't return value because dtrace doesn't currently support it 1495DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1496 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1497 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1498DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1499 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1500 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1501 1502#define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1503 , EntryProbe, ReturnProbe) \ 1504\ 1505 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1506 , ReturnProbe); \ 1507\ 1508JNI_ENTRY(ResultType, \ 1509 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1510 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1511 EntryProbe; \ 1512 ResultType ret = 0;\ 1513 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1514 (const ResultType&)ret);\ 1515\ 1516 JavaValue jvalue(Tag); \ 1517 JNI_ArgumentPusherArray ap(methodID, args); \ 1518 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1519 ret = jvalue.get_##ResultType(); \ 1520 return ret;\ 1521JNI_END 1522 1523// the runtime type of subword integral basic types is integer 1524DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1525 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1526 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1527DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1528 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1530DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1531 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1533DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1534 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1536 1537DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1538 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1539 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1540DEFINE_CALLMETHODA(jint, Int, T_INT, 1541 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1543DEFINE_CALLMETHODA(jlong, Long, T_LONG 1544 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1546// Float and double probes don't return value because dtrace doesn't currently support it 1547DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1548 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1549 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1550DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1551 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1552 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1553 1554DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1555DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1556DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1557 1558 1559JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1560 JNIWrapper("CallVoidMethod"); 1561 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1562 DT_VOID_RETURN_MARK(CallVoidMethod); 1563 1564 va_list args; 1565 va_start(args, methodID); 1566 JavaValue jvalue(T_VOID); 1567 JNI_ArgumentPusherVaArg ap(methodID, args); 1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1569 va_end(args); 1570JNI_END 1571 1572 1573JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1574 JNIWrapper("CallVoidMethodV"); 1575 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1576 DT_VOID_RETURN_MARK(CallVoidMethodV); 1577 1578 JavaValue jvalue(T_VOID); 1579 JNI_ArgumentPusherVaArg ap(methodID, args); 1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1581JNI_END 1582 1583 1584JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1585 JNIWrapper("CallVoidMethodA"); 1586 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1587 DT_VOID_RETURN_MARK(CallVoidMethodA); 1588 1589 JavaValue jvalue(T_VOID); 1590 JNI_ArgumentPusherArray ap(methodID, args); 1591 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1592JNI_END 1593 1594 1595 1596#define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1597 , EntryProbe, ReturnProbe) \ 1598\ 1599 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1600 , ReturnProbe);\ 1601\ 1602JNI_ENTRY(ResultType, \ 1603 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1604 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1605\ 1606 EntryProbe;\ 1607 ResultType ret;\ 1608 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1609 (const ResultType&)ret);\ 1610\ 1611 va_list args; \ 1612 va_start(args, methodID); \ 1613 JavaValue jvalue(Tag); \ 1614 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1615 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1616 va_end(args); \ 1617 ret = jvalue.get_##ResultType(); \ 1618 return ret;\ 1619JNI_END 1620 1621// the runtime type of subword integral basic types is integer 1622DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1623 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1624 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1625DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1626 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1627 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1628DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1629 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1631DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1632 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1634 1635DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1636 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1637 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1638DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1639 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1641DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1642 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643// Float and double probes don't return value because dtrace doesn't currently support it 1644 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1645DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1646 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1647 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1648DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1649 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1650 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1651 1652#define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1653 , EntryProbe, ReturnProbe) \ 1654\ 1655 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1656 , ReturnProbe);\ 1657\ 1658JNI_ENTRY(ResultType, \ 1659 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1660 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1661\ 1662 EntryProbe;\ 1663 ResultType ret;\ 1664 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1665 (const ResultType&)ret);\ 1666\ 1667 JavaValue jvalue(Tag); \ 1668 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1669 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1670 ret = jvalue.get_##ResultType(); \ 1671 return ret;\ 1672JNI_END 1673 1674// the runtime type of subword integral basic types is integer 1675DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1676 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1677 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1678DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1679 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1680 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1681DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1682 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1684DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1685 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1687 1688DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1689 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1690 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1691DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1692 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1694DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1695 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696// Float and double probes don't return value because dtrace doesn't currently support it 1697 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1698DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1699 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1700 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1701DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1702 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1703 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1704 1705#define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1706 , EntryProbe, ReturnProbe) \ 1707\ 1708 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1709 , ReturnProbe);\ 1710\ 1711JNI_ENTRY(ResultType, \ 1712 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1713 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1714\ 1715 EntryProbe;\ 1716 ResultType ret;\ 1717 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1718 (const ResultType&)ret);\ 1719\ 1720 JavaValue jvalue(Tag); \ 1721 JNI_ArgumentPusherArray ap(methodID, args); \ 1722 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1723 ret = jvalue.get_##ResultType(); \ 1724 return ret;\ 1725JNI_END 1726 1727// the runtime type of subword integral basic types is integer 1728DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1729 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1730 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1731DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1732 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1734DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1735 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1737DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1738 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1740 1741DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1742 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1743 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1744DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1745 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1747DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1748 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749// Float and double probes don't return value because dtrace doesn't currently support it 1750 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1751DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1752 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1753 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1754DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1755 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1756 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1757 1758DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1759 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1760DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1762DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1764 1765JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1766 JNIWrapper("CallNonvirtualVoidMethod"); 1767 1768 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1769 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1770 1771 va_list args; 1772 va_start(args, methodID); 1773 JavaValue jvalue(T_VOID); 1774 JNI_ArgumentPusherVaArg ap(methodID, args); 1775 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1776 va_end(args); 1777JNI_END 1778 1779 1780JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1781 JNIWrapper("CallNonvirtualVoidMethodV"); 1782 1783 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1784 env, obj, cls, (uintptr_t) methodID); 1785 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1786 1787 JavaValue jvalue(T_VOID); 1788 JNI_ArgumentPusherVaArg ap(methodID, args); 1789 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1790JNI_END 1791 1792 1793JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1794 JNIWrapper("CallNonvirtualVoidMethodA"); 1795 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1796 env, obj, cls, (uintptr_t) methodID); 1797 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1798 JavaValue jvalue(T_VOID); 1799 JNI_ArgumentPusherArray ap(methodID, args); 1800 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1801JNI_END 1802 1803 1804 1805#define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1806 , EntryProbe, ResultProbe) \ 1807\ 1808 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1809 , ResultProbe); \ 1810\ 1811JNI_ENTRY(ResultType, \ 1812 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1813 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1814\ 1815 EntryProbe; \ 1816 ResultType ret = 0;\ 1817 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1818 (const ResultType&)ret);\ 1819\ 1820 va_list args; \ 1821 va_start(args, methodID); \ 1822 JavaValue jvalue(Tag); \ 1823 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1824 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1825 va_end(args); \ 1826 ret = jvalue.get_##ResultType(); \ 1827 return ret;\ 1828JNI_END 1829 1830// the runtime type of subword integral basic types is integer 1831DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1832 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1833 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1834DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1835 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1836 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1837DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1838 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1840DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1841 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1843 1844DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1845 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1846 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1847DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1848 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1850DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1851 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1853// Float and double probes don't return value because dtrace doesn't currently support it 1854DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1855 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1856 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1857DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1858 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1859 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1860 1861#define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1862 , EntryProbe, ResultProbe) \ 1863\ 1864 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1865 , ResultProbe); \ 1866\ 1867JNI_ENTRY(ResultType, \ 1868 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1869 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1870\ 1871 EntryProbe; \ 1872 ResultType ret = 0;\ 1873 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1874 (const ResultType&)ret);\ 1875\ 1876 JavaValue jvalue(Tag); \ 1877 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1878 /* Make sure class is initialized before trying to invoke its method */ \ 1879 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1880 k()->initialize(CHECK_0); \ 1881 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1882 va_end(args); \ 1883 ret = jvalue.get_##ResultType(); \ 1884 return ret;\ 1885JNI_END 1886 1887// the runtime type of subword integral basic types is integer 1888DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1889 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1890 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1891DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1892 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1893 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1894DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1895 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1897DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1898 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1900 1901DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1902 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1903 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1904DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1905 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1907DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1908 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1910// Float and double probes don't return value because dtrace doesn't currently support it 1911DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1912 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1913 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1914DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1915 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1916 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1917 1918#define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1919 , EntryProbe, ResultProbe) \ 1920\ 1921 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1922 , ResultProbe); \ 1923\ 1924JNI_ENTRY(ResultType, \ 1925 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1926 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1927\ 1928 EntryProbe; \ 1929 ResultType ret = 0;\ 1930 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1931 (const ResultType&)ret);\ 1932\ 1933 JavaValue jvalue(Tag); \ 1934 JNI_ArgumentPusherArray ap(methodID, args); \ 1935 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1936 ret = jvalue.get_##ResultType(); \ 1937 return ret;\ 1938JNI_END 1939 1940// the runtime type of subword integral basic types is integer 1941DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1942 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1943 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1944DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1945 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1946 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1947DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1948 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1950DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1951 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1953 1954DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1955 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1956 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1957DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1958 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1960DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1961 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1963// Float and double probes don't return value because dtrace doesn't currently support it 1964DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1965 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1966 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1967DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1968 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1969 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1970 1971DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1972 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1973DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1975DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1977 1978JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1979 JNIWrapper("CallStaticVoidMethod"); 1980 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1981 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1982 1983 va_list args; 1984 va_start(args, methodID); 1985 JavaValue jvalue(T_VOID); 1986 JNI_ArgumentPusherVaArg ap(methodID, args); 1987 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1988 va_end(args); 1989JNI_END 1990 1991 1992JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1993 JNIWrapper("CallStaticVoidMethodV"); 1994 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1995 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1996 1997 JavaValue jvalue(T_VOID); 1998 JNI_ArgumentPusherVaArg ap(methodID, args); 1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2000JNI_END 2001 2002 2003JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2004 JNIWrapper("CallStaticVoidMethodA"); 2005 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2006 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2007 2008 JavaValue jvalue(T_VOID); 2009 JNI_ArgumentPusherArray ap(methodID, args); 2010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2011JNI_END 2012 2013 2014// 2015// Accessing Fields 2016// 2017 2018 2019DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2020 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2021 2022JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2023 const char *name, const char *sig)) 2024 JNIWrapper("GetFieldID"); 2025 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2026 jfieldID ret = 0; 2027 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2028 2029 // The class should have been loaded (we have an instance of the class 2030 // passed in) so the field and signature should already be in the symbol 2031 // table. If they're not there, the field doesn't exist. 2032 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2033 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2034 if (fieldname == NULL || signame == NULL) { 2035 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2036 } 2037 KlassHandle k(THREAD, 2038 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2039 // Make sure class is initialized before handing id's out to fields 2040 k()->initialize(CHECK_NULL); 2041 2042 fieldDescriptor fd; 2043 if (!k()->oop_is_instance() || 2044 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2045 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2046 } 2047 2048 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2049 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2050 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2051 return ret; 2052JNI_END 2053 2054 2055JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2056 JNIWrapper("GetObjectField"); 2057 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2058 oop o = JNIHandles::resolve_non_null(obj); 2059 Klass* k = o->klass(); 2060 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2061 // Keep JVMTI addition small and only check enabled flag here. 2062 // jni_GetField_probe() assumes that is okay to create handles. 2063 if (JvmtiExport::should_post_field_access()) { 2064 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2065 } 2066 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2067#if INCLUDE_ALL_GCS 2068 // If G1 is enabled and we are accessing the value of the referent 2069 // field in a reference object then we need to register a non-null 2070 // referent with the SATB barrier. 2071 if (UseG1GC) { 2072 bool needs_barrier = false; 2073 2074 if (ret != NULL && 2075 offset == java_lang_ref_Reference::referent_offset && 2076 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2077 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2078 needs_barrier = true; 2079 } 2080 2081 if (needs_barrier) { 2082 oop referent = JNIHandles::resolve(ret); 2083 G1SATBCardTableModRefBS::enqueue(referent); 2084 } 2085 } 2086#endif // INCLUDE_ALL_GCS 2087HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2088 return ret; 2089JNI_END 2090 2091 2092 2093#define DEFINE_GETFIELD(Return,Fieldname,Result \ 2094 , EntryProbe, ReturnProbe) \ 2095\ 2096 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2097 , ReturnProbe); \ 2098\ 2099JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2100 JNIWrapper("Get" XSTR(Result) "Field"); \ 2101\ 2102 EntryProbe; \ 2103 Return ret = 0;\ 2104 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2105\ 2106 oop o = JNIHandles::resolve_non_null(obj); \ 2107 Klass* k = o->klass(); \ 2108 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2109 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2110 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2111 /* and creates a ResetNoHandleMark. */ \ 2112 if (JvmtiExport::should_post_field_access()) { \ 2113 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2114 } \ 2115 ret = o->Fieldname##_field(offset); \ 2116 return ret; \ 2117JNI_END 2118 2119DEFINE_GETFIELD(jboolean, bool, Boolean 2120 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2121 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2122DEFINE_GETFIELD(jbyte, byte, Byte 2123 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2124 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2125DEFINE_GETFIELD(jchar, char, Char 2126 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2127 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2128DEFINE_GETFIELD(jshort, short, Short 2129 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2130 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2131DEFINE_GETFIELD(jint, int, Int 2132 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2133 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2134DEFINE_GETFIELD(jlong, long, Long 2135 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2137// Float and double probes don't return value because dtrace doesn't currently support it 2138DEFINE_GETFIELD(jfloat, float, Float 2139 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2140 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2141DEFINE_GETFIELD(jdouble, double, Double 2142 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2143 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2144 2145address jni_GetBooleanField_addr() { 2146 return (address)jni_GetBooleanField; 2147} 2148address jni_GetByteField_addr() { 2149 return (address)jni_GetByteField; 2150} 2151address jni_GetCharField_addr() { 2152 return (address)jni_GetCharField; 2153} 2154address jni_GetShortField_addr() { 2155 return (address)jni_GetShortField; 2156} 2157address jni_GetIntField_addr() { 2158 return (address)jni_GetIntField; 2159} 2160address jni_GetLongField_addr() { 2161 return (address)jni_GetLongField; 2162} 2163address jni_GetFloatField_addr() { 2164 return (address)jni_GetFloatField; 2165} 2166address jni_GetDoubleField_addr() { 2167 return (address)jni_GetDoubleField; 2168} 2169 2170JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2171 JNIWrapper("SetObjectField"); 2172 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2173 oop o = JNIHandles::resolve_non_null(obj); 2174 Klass* k = o->klass(); 2175 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2176 // Keep JVMTI addition small and only check enabled flag here. 2177 // jni_SetField_probe_nh() assumes that is not okay to create handles 2178 // and creates a ResetNoHandleMark. 2179 if (JvmtiExport::should_post_field_modification()) { 2180 jvalue field_value; 2181 field_value.l = value; 2182 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2183 } 2184 o->obj_field_put(offset, JNIHandles::resolve(value)); 2185 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2186JNI_END 2187 2188 2189#define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2190 , EntryProbe, ReturnProbe) \ 2191\ 2192JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2193 JNIWrapper("Set" XSTR(Result) "Field"); \ 2194\ 2195 EntryProbe; \ 2196\ 2197 oop o = JNIHandles::resolve_non_null(obj); \ 2198 Klass* k = o->klass(); \ 2199 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2200 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2201 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2202 /* and creates a ResetNoHandleMark. */ \ 2203 if (JvmtiExport::should_post_field_modification()) { \ 2204 jvalue field_value; \ 2205 field_value.unionType = value; \ 2206 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2207 } \ 2208 o->Fieldname##_field_put(offset, value); \ 2209 ReturnProbe; \ 2210JNI_END 2211 2212DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2213 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2214 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2215DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2216 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2217 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2218DEFINE_SETFIELD(jchar, char, Char, 'C', c 2219 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2220 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2221DEFINE_SETFIELD(jshort, short, Short, 'S', s 2222 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2223 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2224DEFINE_SETFIELD(jint, int, Int, 'I', i 2225 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2226 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2227DEFINE_SETFIELD(jlong, long, Long, 'J', j 2228 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2229 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2230// Float and double probes don't return value because dtrace doesn't currently support it 2231DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2232 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2233 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2234DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2235 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2236 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2237 2238DT_RETURN_MARK_DECL(ToReflectedField, jobject 2239 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2240 2241JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2242 JNIWrapper("ToReflectedField"); 2243 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2244 jobject ret = NULL; 2245 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2246 2247 fieldDescriptor fd; 2248 bool found = false; 2249 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2250 2251 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2252 2253 if (isStatic) { 2254 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2255 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2256 assert(id->is_static_field_id(), "invalid static field id"); 2257 found = id->find_local_field(&fd); 2258 } else { 2259 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2260 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2261 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2262 } 2263 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2264 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2265 ret = JNIHandles::make_local(env, reflected); 2266 return ret; 2267JNI_END 2268 2269 2270// 2271// Accessing Static Fields 2272// 2273DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2274 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2275 2276JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2277 const char *name, const char *sig)) 2278 JNIWrapper("GetStaticFieldID"); 2279 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2280 jfieldID ret = NULL; 2281 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2282 2283 // The class should have been loaded (we have an instance of the class 2284 // passed in) so the field and signature should already be in the symbol 2285 // table. If they're not there, the field doesn't exist. 2286 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2287 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2288 if (fieldname == NULL || signame == NULL) { 2289 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2290 } 2291 KlassHandle k(THREAD, 2292 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2293 // Make sure class is initialized before handing id's out to static fields 2294 k()->initialize(CHECK_NULL); 2295 2296 fieldDescriptor fd; 2297 if (!k()->oop_is_instance() || 2298 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2299 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2300 } 2301 2302 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2303 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2304 debug_only(id->set_is_static_field_id();) 2305 2306 debug_only(id->verify(fd.field_holder())); 2307 2308 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2309 return ret; 2310JNI_END 2311 2312 2313JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2314 JNIWrapper("GetStaticObjectField"); 2315 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2316#if INCLUDE_JNI_CHECK 2317 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2318#endif // INCLUDE_JNI_CHECK 2319 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2320 assert(id->is_static_field_id(), "invalid static field id"); 2321 // Keep JVMTI addition small and only check enabled flag here. 2322 // jni_GetField_probe() assumes that is okay to create handles. 2323 if (JvmtiExport::should_post_field_access()) { 2324 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2325 } 2326 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2327 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2328 return ret; 2329JNI_END 2330 2331 2332#define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2333 , EntryProbe, ReturnProbe) \ 2334\ 2335 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2336 , ReturnProbe); \ 2337\ 2338JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2339 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2340 EntryProbe; \ 2341 Return ret = 0;\ 2342 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2343 (const Return&)ret);\ 2344 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2345 assert(id->is_static_field_id(), "invalid static field id"); \ 2346 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2347 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2348 if (JvmtiExport::should_post_field_access()) { \ 2349 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2350 } \ 2351 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2352 return ret;\ 2353JNI_END 2354 2355DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2356 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2357DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2358 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2359DEFINE_GETSTATICFIELD(jchar, char, Char 2360 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2361DEFINE_GETSTATICFIELD(jshort, short, Short 2362 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2363DEFINE_GETSTATICFIELD(jint, int, Int 2364 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2365DEFINE_GETSTATICFIELD(jlong, long, Long 2366 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2367// Float and double probes don't return value because dtrace doesn't currently support it 2368DEFINE_GETSTATICFIELD(jfloat, float, Float 2369 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2370DEFINE_GETSTATICFIELD(jdouble, double, Double 2371 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2372 2373JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2374 JNIWrapper("SetStaticObjectField"); 2375 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2376 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2377 assert(id->is_static_field_id(), "invalid static field id"); 2378 // Keep JVMTI addition small and only check enabled flag here. 2379 // jni_SetField_probe() assumes that is okay to create handles. 2380 if (JvmtiExport::should_post_field_modification()) { 2381 jvalue field_value; 2382 field_value.l = value; 2383 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2384 } 2385 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2386 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2387JNI_END 2388 2389 2390 2391#define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2392 , EntryProbe, ReturnProbe) \ 2393\ 2394JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2395 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2396 EntryProbe; \ 2397\ 2398 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2399 assert(id->is_static_field_id(), "invalid static field id"); \ 2400 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2401 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2402 if (JvmtiExport::should_post_field_modification()) { \ 2403 jvalue field_value; \ 2404 field_value.unionType = value; \ 2405 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2406 } \ 2407 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2408 ReturnProbe;\ 2409JNI_END 2410 2411DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2412 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2413 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2414DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2415 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2416 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2417DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2418 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2419 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2420DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2421 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2422 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2423DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2424 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2425 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2426DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2427 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2428 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2429// Float and double probes don't return value because dtrace doesn't currently support it 2430DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2431 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2432 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2433DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2434 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2435 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2436 2437// 2438// String Operations 2439// 2440 2441// Unicode Interface 2442 2443DT_RETURN_MARK_DECL(NewString, jstring 2444 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2445 2446JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2447 JNIWrapper("NewString"); 2448 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2449 jstring ret = NULL; 2450 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2451 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2452 ret = (jstring) JNIHandles::make_local(env, string); 2453 return ret; 2454JNI_END 2455 2456 2457JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2458 JNIWrapper("GetStringLength"); 2459 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2460 jsize ret = 0; 2461 oop s = JNIHandles::resolve_non_null(string); 2462 if (java_lang_String::value(s) != NULL) { 2463 ret = java_lang_String::length(s); 2464 } 2465 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2466 return ret; 2467JNI_END 2468 2469 2470JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2471 JNIEnv *env, jstring string, jboolean *isCopy)) 2472 JNIWrapper("GetStringChars"); 2473 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2474 jchar* buf = NULL; 2475 oop s = JNIHandles::resolve_non_null(string); 2476 typeArrayOop s_value = java_lang_String::value(s); 2477 if (s_value != NULL) { 2478 int s_len = java_lang_String::length(s); 2479 int s_offset = java_lang_String::offset(s); 2480 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2481 /* JNI Specification states return NULL on OOM */ 2482 if (buf != NULL) { 2483 if (s_len > 0) { 2484 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); 2485 } 2486 buf[s_len] = 0; 2487 //%note jni_5 2488 if (isCopy != NULL) { 2489 *isCopy = JNI_TRUE; 2490 } 2491 } 2492 } 2493 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2494 return buf; 2495JNI_END 2496 2497 2498JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2499 JNIWrapper("ReleaseStringChars"); 2500 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2501 //%note jni_6 2502 if (chars != NULL) { 2503 // Since String objects are supposed to be immutable, don't copy any 2504 // new data back. A bad user will have to go after the char array. 2505 FreeHeap((void*) chars); 2506 } 2507 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2508JNI_END 2509 2510 2511// UTF Interface 2512 2513DT_RETURN_MARK_DECL(NewStringUTF, jstring 2514 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2515 2516JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2517 JNIWrapper("NewStringUTF"); 2518 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2519 jstring ret; 2520 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2521 2522 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2523 ret = (jstring) JNIHandles::make_local(env, result); 2524 return ret; 2525JNI_END 2526 2527 2528JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2529 JNIWrapper("GetStringUTFLength"); 2530 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2531 jsize ret = 0; 2532 oop java_string = JNIHandles::resolve_non_null(string); 2533 if (java_lang_String::value(java_string) != NULL) { 2534 ret = java_lang_String::utf8_length(java_string); 2535 } 2536 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2537 return ret; 2538JNI_END 2539 2540 2541JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2542 JNIWrapper("GetStringUTFChars"); 2543 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2544 char* result = NULL; 2545 oop java_string = JNIHandles::resolve_non_null(string); 2546 if (java_lang_String::value(java_string) != NULL) { 2547 size_t length = java_lang_String::utf8_length(java_string); 2548 /* JNI Specification states return NULL on OOM */ 2549 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2550 if (result != NULL) { 2551 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2552 if (isCopy != NULL) { 2553 *isCopy = JNI_TRUE; 2554 } 2555 } 2556 } 2557 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2558 return result; 2559JNI_END 2560 2561 2562JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2563 JNIWrapper("ReleaseStringUTFChars"); 2564 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2565 if (chars != NULL) { 2566 FreeHeap((char*) chars); 2567 } 2568HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2569JNI_END 2570 2571 2572JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2573 JNIWrapper("GetArrayLength"); 2574 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2575 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2576 assert(a->is_array(), "must be array"); 2577 jsize ret = a->length(); 2578 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2579 return ret; 2580JNI_END 2581 2582 2583// 2584// Object Array Operations 2585// 2586 2587DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2588 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2589 2590JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2591 JNIWrapper("NewObjectArray"); 2592 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2593 jobjectArray ret = NULL; 2594 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2595 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2596 Klass* ako = ek()->array_klass(CHECK_NULL); 2597 KlassHandle ak = KlassHandle(THREAD, ako); 2598 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2599 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2600 oop initial_value = JNIHandles::resolve(initialElement); 2601 if (initial_value != NULL) { // array already initialized with NULL 2602 for (int index = 0; index < length; index++) { 2603 result->obj_at_put(index, initial_value); 2604 } 2605 } 2606 ret = (jobjectArray) JNIHandles::make_local(env, result); 2607 return ret; 2608JNI_END 2609 2610DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2611 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2612 2613JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2614 JNIWrapper("GetObjectArrayElement"); 2615 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2616 jobject ret = NULL; 2617 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2618 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2619 if (a->is_within_bounds(index)) { 2620 ret = JNIHandles::make_local(env, a->obj_at(index)); 2621 return ret; 2622 } else { 2623 char buf[jintAsStringSize]; 2624 sprintf(buf, "%d", index); 2625 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2626 } 2627JNI_END 2628 2629DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2630 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2631 2632JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2633 JNIWrapper("SetObjectArrayElement"); 2634 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2635 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2636 2637 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2638 oop v = JNIHandles::resolve(value); 2639 if (a->is_within_bounds(index)) { 2640 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2641 a->obj_at_put(index, v); 2642 } else { 2643 THROW(vmSymbols::java_lang_ArrayStoreException()); 2644 } 2645 } else { 2646 char buf[jintAsStringSize]; 2647 sprintf(buf, "%d", index); 2648 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2649 } 2650JNI_END 2651 2652 2653 2654#define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2655 ,EntryProbe,ReturnProbe) \ 2656\ 2657 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2658 , ReturnProbe); \ 2659\ 2660JNI_ENTRY(Return, \ 2661 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2662 JNIWrapper("New" XSTR(Result) "Array"); \ 2663 EntryProbe; \ 2664 Return ret = NULL;\ 2665 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2666\ 2667 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2668 ret = (Return) JNIHandles::make_local(env, obj); \ 2669 return ret;\ 2670JNI_END 2671 2672DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2673 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2674 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2675DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2676 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2677 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2678DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2679 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2680 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2681DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2682 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2683 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2684DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2685 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2686 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2687DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2688 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2689 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2690DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2691 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2692 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2693DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2694 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2695 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2696 2697// Return an address which will fault if the caller writes to it. 2698 2699static char* get_bad_address() { 2700 static char* bad_address = NULL; 2701 if (bad_address == NULL) { 2702 size_t size = os::vm_allocation_granularity(); 2703 bad_address = os::reserve_memory(size); 2704 if (bad_address != NULL) { 2705 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2706 /*is_committed*/false); 2707 } 2708 } 2709 return bad_address; 2710} 2711 2712 2713 2714#define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2715 , EntryProbe, ReturnProbe) \ 2716\ 2717JNI_QUICK_ENTRY(ElementType*, \ 2718 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2719 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2720 EntryProbe; \ 2721 /* allocate an chunk of memory in c land */ \ 2722 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2723 ElementType* result; \ 2724 int len = a->length(); \ 2725 if (len == 0) { \ 2726 /* Empty array: legal but useless, can't return NULL. \ 2727 * Return a pointer to something useless. \ 2728 * Avoid asserts in typeArrayOop. */ \ 2729 result = (ElementType*)get_bad_address(); \ 2730 } else { \ 2731 /* JNI Specification states return NULL on OOM */ \ 2732 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2733 if (result != NULL) { \ 2734 /* copy the array to the c chunk */ \ 2735 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2736 if (isCopy) { \ 2737 *isCopy = JNI_TRUE; \ 2738 } \ 2739 } \ 2740 } \ 2741 ReturnProbe; \ 2742 return result; \ 2743JNI_END 2744 2745DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2746 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2747 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2748DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2749 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2750 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2751DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2752 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2753 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2754DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2755 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2756 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2757DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2758 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2760DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2761 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2762 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2763// Float and double probes don't return value because dtrace doesn't currently support it 2764DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2765 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2766 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2767DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2768 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2769 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2770 2771 2772#define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2773 , EntryProbe, ReturnProbe);\ 2774\ 2775JNI_QUICK_ENTRY(void, \ 2776 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2777 ElementType *buf, jint mode)) \ 2778 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2779 EntryProbe; \ 2780 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2781 int len = a->length(); \ 2782 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2783 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2784 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2785 } \ 2786 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2787 FreeHeap(buf); \ 2788 } \ 2789 } \ 2790 ReturnProbe; \ 2791JNI_END 2792 2793DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2794 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2795 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2796DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2797 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2798 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2799DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2800 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2801 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2802DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2803 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2804 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2805DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2806 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2807 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2808DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2809 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2810 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2811DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2812 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2813 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2814DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2815 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2816 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2817 2818 2819#define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2820 , EntryProbe, ReturnProbe); \ 2821 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2822 , ReturnProbe); \ 2823\ 2824JNI_ENTRY(void, \ 2825jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2826 jsize len, ElementType *buf)) \ 2827 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2828 EntryProbe; \ 2829 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2830 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2831 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2832 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2833 } else { \ 2834 if (len > 0) { \ 2835 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2836 memcpy((u_char*) buf, \ 2837 (u_char*) src->Tag##_at_addr(start), \ 2838 len << sc); \ 2839 } \ 2840 } \ 2841JNI_END 2842 2843DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2844 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2845 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2846DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2847 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2848 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2849DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2850 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2851 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2852DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2853 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2854 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2855DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2856 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2857 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2858DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2859 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2860 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2861DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2862 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2863 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2864DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2865 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2866 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2867 2868 2869#define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2870 , EntryProbe, ReturnProbe); \ 2871 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2872 ,ReturnProbe); \ 2873\ 2874JNI_ENTRY(void, \ 2875jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2876 jsize len, const ElementType *buf)) \ 2877 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2878 EntryProbe; \ 2879 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2880 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2881 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2882 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2883 } else { \ 2884 if (len > 0) { \ 2885 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2886 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2887 (u_char*) buf, \ 2888 len << sc); \ 2889 } \ 2890 } \ 2891JNI_END 2892 2893DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2894 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2895 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2896DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2897 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2898 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2899DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2900 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2901 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2902DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2903 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2904 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2905DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2906 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2907 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2908DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2909 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2910 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2911DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2912 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2913 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2914DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2915 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2916 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2917 2918 2919// 2920// Interception of natives 2921// 2922 2923// The RegisterNatives call being attempted tried to register with a method that 2924// is not native. Ask JVM TI what prefixes have been specified. Then check 2925// to see if the native method is now wrapped with the prefixes. See the 2926// SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2927static Method* find_prefixed_native(KlassHandle k, 2928 Symbol* name, Symbol* signature, TRAPS) { 2929#if INCLUDE_JVMTI 2930 ResourceMark rm(THREAD); 2931 Method* method; 2932 int name_len = name->utf8_length(); 2933 char* name_str = name->as_utf8(); 2934 int prefix_count; 2935 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2936 for (int i = 0; i < prefix_count; i++) { 2937 char* prefix = prefixes[i]; 2938 int prefix_len = (int)strlen(prefix); 2939 2940 // try adding this prefix to the method name and see if it matches another method name 2941 int trial_len = name_len + prefix_len; 2942 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2943 strcpy(trial_name_str, prefix); 2944 strcat(trial_name_str, name_str); 2945 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2946 if (trial_name == NULL) { 2947 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2948 } 2949 method = k()->lookup_method(trial_name, signature); 2950 if (method == NULL) { 2951 continue; // signature doesn't match, try the next prefix 2952 } 2953 if (method->is_native()) { 2954 method->set_is_prefixed_native(); 2955 return method; // wahoo, we found a prefixed version of the method, return it 2956 } 2957 // found as non-native, so prefix is good, add it, probably just need more prefixes 2958 name_len = trial_len; 2959 name_str = trial_name_str; 2960 } 2961#endif // INCLUDE_JVMTI 2962 return NULL; // not found 2963} 2964 2965static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2966 Method* method = k()->lookup_method(name, signature); 2967 if (method == NULL) { 2968 ResourceMark rm; 2969 stringStream st; 2970 st.print("Method %s name or signature does not match", 2971 Method::name_and_sig_as_C_string(k(), name, signature)); 2972 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2973 } 2974 if (!method->is_native()) { 2975 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2976 method = find_prefixed_native(k, name, signature, THREAD); 2977 if (method == NULL) { 2978 ResourceMark rm; 2979 stringStream st; 2980 st.print("Method %s is not declared as native", 2981 Method::name_and_sig_as_C_string(k(), name, signature)); 2982 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2983 } 2984 } 2985 2986 if (entry != NULL) { 2987 method->set_native_function(entry, 2988 Method::native_bind_event_is_interesting); 2989 } else { 2990 method->clear_native_function(); 2991 } 2992 if (PrintJNIResolving) { 2993 ResourceMark rm(THREAD); 2994 tty->print_cr("[Registering JNI native method %s.%s]", 2995 method->method_holder()->external_name(), 2996 method->name()->as_C_string()); 2997 } 2998 return true; 2999} 3000 3001DT_RETURN_MARK_DECL(RegisterNatives, jint 3002 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3003 3004JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3005 const JNINativeMethod *methods, 3006 jint nMethods)) 3007 JNIWrapper("RegisterNatives"); 3008 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3009 jint ret = 0; 3010 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3011 3012 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3013 3014 for (int index = 0; index < nMethods; index++) { 3015 const char* meth_name = methods[index].name; 3016 const char* meth_sig = methods[index].signature; 3017 int meth_name_len = (int)strlen(meth_name); 3018 3019 // The class should have been loaded (we have an instance of the class 3020 // passed in) so the method and signature should already be in the symbol 3021 // table. If they're not there, the method doesn't exist. 3022 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3023 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3024 3025 if (name == NULL || signature == NULL) { 3026 ResourceMark rm; 3027 stringStream st; 3028 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3029 // Must return negative value on failure 3030 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3031 } 3032 3033 bool res = register_native(h_k, name, signature, 3034 (address) methods[index].fnPtr, THREAD); 3035 if (!res) { 3036 ret = -1; 3037 break; 3038 } 3039 } 3040 return ret; 3041JNI_END 3042 3043 3044JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3045 JNIWrapper("UnregisterNatives"); 3046 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3047 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3048 //%note jni_2 3049 if (k->oop_is_instance()) { 3050 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3051 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3052 if (m->is_native()) { 3053 m->clear_native_function(); 3054 m->set_signature_handler(NULL); 3055 } 3056 } 3057 } 3058 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3059 return 0; 3060JNI_END 3061 3062// 3063// Monitor functions 3064// 3065 3066DT_RETURN_MARK_DECL(MonitorEnter, jint 3067 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3068 3069JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3070 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3071 jint ret = JNI_ERR; 3072 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3073 3074 // If the object is null, we can't do anything with it 3075 if (jobj == NULL) { 3076 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3077 } 3078 3079 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3080 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3081 ret = JNI_OK; 3082 return ret; 3083JNI_END 3084 3085DT_RETURN_MARK_DECL(MonitorExit, jint 3086 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3087 3088JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3089 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3090 jint ret = JNI_ERR; 3091 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3092 3093 // Don't do anything with a null object 3094 if (jobj == NULL) { 3095 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3096 } 3097 3098 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3099 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3100 3101 ret = JNI_OK; 3102 return ret; 3103JNI_END 3104 3105// 3106// Extensions 3107// 3108 3109DT_VOID_RETURN_MARK_DECL(GetStringRegion 3110 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3111 3112JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3113 JNIWrapper("GetStringRegion"); 3114 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3115 DT_VOID_RETURN_MARK(GetStringRegion); 3116 oop s = JNIHandles::resolve_non_null(string); 3117 int s_len = java_lang_String::length(s); 3118 if (start < 0 || len < 0 || start + len > s_len) { 3119 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3120 } else { 3121 if (len > 0) { 3122 int s_offset = java_lang_String::offset(s); 3123 typeArrayOop s_value = java_lang_String::value(s); 3124 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); 3125 } 3126 } 3127JNI_END 3128 3129DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3130 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3131 3132JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3133 JNIWrapper("GetStringUTFRegion"); 3134 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3135 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3136 oop s = JNIHandles::resolve_non_null(string); 3137 int s_len = java_lang_String::length(s); 3138 if (start < 0 || len < 0 || start + len > s_len) { 3139 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3140 } else { 3141 //%note jni_7 3142 if (len > 0) { 3143 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3144 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3145 // as_utf8_string null-terminates the result string 3146 } else { 3147 // JDK null-terminates the buffer even in len is zero 3148 if (buf != NULL) { 3149 buf[0] = 0; 3150 } 3151 } 3152 } 3153JNI_END 3154 3155 3156JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3157 JNIWrapper("GetPrimitiveArrayCritical"); 3158 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3159 GC_locker::lock_critical(thread); 3160 if (isCopy != NULL) { 3161 *isCopy = JNI_FALSE; 3162 } 3163 oop a = JNIHandles::resolve_non_null(array); 3164 assert(a->is_array(), "just checking"); 3165 BasicType type; 3166 if (a->is_objArray()) { 3167 type = T_OBJECT; 3168 } else { 3169 type = TypeArrayKlass::cast(a->klass())->element_type(); 3170 } 3171 void* ret = arrayOop(a)->base(type); 3172 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3173 return ret; 3174JNI_END 3175 3176 3177JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3178 JNIWrapper("ReleasePrimitiveArrayCritical"); 3179 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3180 // The array, carray and mode arguments are ignored 3181 GC_locker::unlock_critical(thread); 3182HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3183JNI_END 3184 3185 3186JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3187 JNIWrapper("GetStringCritical"); 3188 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3189 GC_locker::lock_critical(thread); 3190 if (isCopy != NULL) { 3191 *isCopy = JNI_FALSE; 3192 } 3193 oop s = JNIHandles::resolve_non_null(string); 3194 int s_len = java_lang_String::length(s); 3195 typeArrayOop s_value = java_lang_String::value(s); 3196 int s_offset = java_lang_String::offset(s); 3197 const jchar* ret; 3198 if (s_len > 0) { 3199 ret = s_value->char_at_addr(s_offset); 3200 } else { 3201 ret = (jchar*) s_value->base(T_CHAR); 3202 } 3203 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3204 return ret; 3205JNI_END 3206 3207 3208JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3209 JNIWrapper("ReleaseStringCritical"); 3210 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3211 // The str and chars arguments are ignored 3212 GC_locker::unlock_critical(thread); 3213HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3214JNI_END 3215 3216 3217JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3218 JNIWrapper("jni_NewWeakGlobalRef"); 3219 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3220 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3221 jweak ret = JNIHandles::make_weak_global(ref_handle); 3222 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3223 return ret; 3224JNI_END 3225 3226// Must be JNI_ENTRY (with HandleMark) 3227JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3228 JNIWrapper("jni_DeleteWeakGlobalRef"); 3229 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3230 JNIHandles::destroy_weak_global(ref); 3231 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3232JNI_END 3233 3234 3235JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3236 JNIWrapper("jni_ExceptionCheck"); 3237 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3238 jni_check_async_exceptions(thread); 3239 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3240 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3241 return ret; 3242JNI_END 3243 3244 3245// Initialization state for three routines below relating to 3246// java.nio.DirectBuffers 3247static jint directBufferSupportInitializeStarted = 0; 3248static volatile jint directBufferSupportInitializeEnded = 0; 3249static volatile jint directBufferSupportInitializeFailed = 0; 3250static jclass bufferClass = NULL; 3251static jclass directBufferClass = NULL; 3252static jclass directByteBufferClass = NULL; 3253static jmethodID directByteBufferConstructor = NULL; 3254static jfieldID directBufferAddressField = NULL; 3255static jfieldID bufferCapacityField = NULL; 3256 3257static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3258 Handle loader; // null (bootstrap) loader 3259 Handle protection_domain; // null protection domain 3260 3261 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3262 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3263 3264 if (TraceClassResolution && result != NULL) { 3265 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3266 } 3267 return result; 3268} 3269 3270// These lookups are done with the NULL (bootstrap) ClassLoader to 3271// circumvent any security checks that would be done by jni_FindClass. 3272JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3273{ 3274 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3275 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3276 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3277 return true; 3278} 3279JNI_END 3280 3281 3282static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3283 if (directBufferSupportInitializeFailed) { 3284 return false; 3285 } 3286 3287 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3288 if (!lookupDirectBufferClasses(env)) { 3289 directBufferSupportInitializeFailed = 1; 3290 return false; 3291 } 3292 3293 // Make global references for these 3294 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3295 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3296 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3297 3298 // Get needed field and method IDs 3299 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3300 if (env->ExceptionCheck()) { 3301 env->ExceptionClear(); 3302 directBufferSupportInitializeFailed = 1; 3303 return false; 3304 } 3305 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3306 if (env->ExceptionCheck()) { 3307 env->ExceptionClear(); 3308 directBufferSupportInitializeFailed = 1; 3309 return false; 3310 } 3311 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3312 if (env->ExceptionCheck()) { 3313 env->ExceptionClear(); 3314 directBufferSupportInitializeFailed = 1; 3315 return false; 3316 } 3317 3318 if ((directByteBufferConstructor == NULL) || 3319 (directBufferAddressField == NULL) || 3320 (bufferCapacityField == NULL)) { 3321 directBufferSupportInitializeFailed = 1; 3322 return false; 3323 } 3324 3325 directBufferSupportInitializeEnded = 1; 3326 } else { 3327 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3328 os::naked_yield(); 3329 } 3330 } 3331 3332 return !directBufferSupportInitializeFailed; 3333} 3334 3335extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3336{ 3337 // thread_from_jni_environment() will block if VM is gone. 3338 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3339 3340 JNIWrapper("jni_NewDirectByteBuffer"); 3341 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3342 3343 if (!directBufferSupportInitializeEnded) { 3344 if (!initializeDirectBufferSupport(env, thread)) { 3345 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3346 return NULL; 3347 } 3348 } 3349 3350 // Being paranoid about accidental sign extension on address 3351 jlong addr = (jlong) ((uintptr_t) address); 3352 // NOTE that package-private DirectByteBuffer constructor currently 3353 // takes int capacity 3354 jint cap = (jint) capacity; 3355 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3356 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3357 return ret; 3358} 3359 3360DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3361 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3362 3363extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3364{ 3365 // thread_from_jni_environment() will block if VM is gone. 3366 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3367 3368 JNIWrapper("jni_GetDirectBufferAddress"); 3369 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3370 void* ret = NULL; 3371 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3372 3373 if (!directBufferSupportInitializeEnded) { 3374 if (!initializeDirectBufferSupport(env, thread)) { 3375 return 0; 3376 } 3377 } 3378 3379 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3380 return 0; 3381 } 3382 3383 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3384 return ret; 3385} 3386 3387DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3388 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3389 3390extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3391{ 3392 // thread_from_jni_environment() will block if VM is gone. 3393 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3394 3395 JNIWrapper("jni_GetDirectBufferCapacity"); 3396 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3397 jlong ret = -1; 3398 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3399 3400 if (!directBufferSupportInitializeEnded) { 3401 if (!initializeDirectBufferSupport(env, thread)) { 3402 ret = 0; 3403 return ret; 3404 } 3405 } 3406 3407 if (buf == NULL) { 3408 return -1; 3409 } 3410 3411 if (!env->IsInstanceOf(buf, directBufferClass)) { 3412 return -1; 3413 } 3414 3415 // NOTE that capacity is currently an int in the implementation 3416 ret = env->GetIntField(buf, bufferCapacityField); 3417 return ret; 3418} 3419 3420 3421JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3422 JNIWrapper("GetVersion"); 3423 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3424 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3425 return CurrentVersion; 3426JNI_END 3427 3428extern struct JavaVM_ main_vm; 3429 3430JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3431 JNIWrapper("jni_GetJavaVM"); 3432 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3433 *vm = (JavaVM *)(&main_vm); 3434 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3435 return JNI_OK; 3436JNI_END 3437 3438// Structure containing all jni functions 3439struct JNINativeInterface_ jni_NativeInterface = { 3440 NULL, 3441 NULL, 3442 NULL, 3443 3444 NULL, 3445 3446 jni_GetVersion, 3447 3448 jni_DefineClass, 3449 jni_FindClass, 3450 3451 jni_FromReflectedMethod, 3452 jni_FromReflectedField, 3453 3454 jni_ToReflectedMethod, 3455 3456 jni_GetSuperclass, 3457 jni_IsAssignableFrom, 3458 3459 jni_ToReflectedField, 3460 3461 jni_Throw, 3462 jni_ThrowNew, 3463 jni_ExceptionOccurred, 3464 jni_ExceptionDescribe, 3465 jni_ExceptionClear, 3466 jni_FatalError, 3467 3468 jni_PushLocalFrame, 3469 jni_PopLocalFrame, 3470 3471 jni_NewGlobalRef, 3472 jni_DeleteGlobalRef, 3473 jni_DeleteLocalRef, 3474 jni_IsSameObject, 3475 3476 jni_NewLocalRef, 3477 jni_EnsureLocalCapacity, 3478 3479 jni_AllocObject, 3480 jni_NewObject, 3481 jni_NewObjectV, 3482 jni_NewObjectA, 3483 3484 jni_GetObjectClass, 3485 jni_IsInstanceOf, 3486 3487 jni_GetMethodID, 3488 3489 jni_CallObjectMethod, 3490 jni_CallObjectMethodV, 3491 jni_CallObjectMethodA, 3492 jni_CallBooleanMethod, 3493 jni_CallBooleanMethodV, 3494 jni_CallBooleanMethodA, 3495 jni_CallByteMethod, 3496 jni_CallByteMethodV, 3497 jni_CallByteMethodA, 3498 jni_CallCharMethod, 3499 jni_CallCharMethodV, 3500 jni_CallCharMethodA, 3501 jni_CallShortMethod, 3502 jni_CallShortMethodV, 3503 jni_CallShortMethodA, 3504 jni_CallIntMethod, 3505 jni_CallIntMethodV, 3506 jni_CallIntMethodA, 3507 jni_CallLongMethod, 3508 jni_CallLongMethodV, 3509 jni_CallLongMethodA, 3510 jni_CallFloatMethod, 3511 jni_CallFloatMethodV, 3512 jni_CallFloatMethodA, 3513 jni_CallDoubleMethod, 3514 jni_CallDoubleMethodV, 3515 jni_CallDoubleMethodA, 3516 jni_CallVoidMethod, 3517 jni_CallVoidMethodV, 3518 jni_CallVoidMethodA, 3519 3520 jni_CallNonvirtualObjectMethod, 3521 jni_CallNonvirtualObjectMethodV, 3522 jni_CallNonvirtualObjectMethodA, 3523 jni_CallNonvirtualBooleanMethod, 3524 jni_CallNonvirtualBooleanMethodV, 3525 jni_CallNonvirtualBooleanMethodA, 3526 jni_CallNonvirtualByteMethod, 3527 jni_CallNonvirtualByteMethodV, 3528 jni_CallNonvirtualByteMethodA, 3529 jni_CallNonvirtualCharMethod, 3530 jni_CallNonvirtualCharMethodV, 3531 jni_CallNonvirtualCharMethodA, 3532 jni_CallNonvirtualShortMethod, 3533 jni_CallNonvirtualShortMethodV, 3534 jni_CallNonvirtualShortMethodA, 3535 jni_CallNonvirtualIntMethod, 3536 jni_CallNonvirtualIntMethodV, 3537 jni_CallNonvirtualIntMethodA, 3538 jni_CallNonvirtualLongMethod, 3539 jni_CallNonvirtualLongMethodV, 3540 jni_CallNonvirtualLongMethodA, 3541 jni_CallNonvirtualFloatMethod, 3542 jni_CallNonvirtualFloatMethodV, 3543 jni_CallNonvirtualFloatMethodA, 3544 jni_CallNonvirtualDoubleMethod, 3545 jni_CallNonvirtualDoubleMethodV, 3546 jni_CallNonvirtualDoubleMethodA, 3547 jni_CallNonvirtualVoidMethod, 3548 jni_CallNonvirtualVoidMethodV, 3549 jni_CallNonvirtualVoidMethodA, 3550 3551 jni_GetFieldID, 3552 3553 jni_GetObjectField, 3554 jni_GetBooleanField, 3555 jni_GetByteField, 3556 jni_GetCharField, 3557 jni_GetShortField, 3558 jni_GetIntField, 3559 jni_GetLongField, 3560 jni_GetFloatField, 3561 jni_GetDoubleField, 3562 3563 jni_SetObjectField, 3564 jni_SetBooleanField, 3565 jni_SetByteField, 3566 jni_SetCharField, 3567 jni_SetShortField, 3568 jni_SetIntField, 3569 jni_SetLongField, 3570 jni_SetFloatField, 3571 jni_SetDoubleField, 3572 3573 jni_GetStaticMethodID, 3574 3575 jni_CallStaticObjectMethod, 3576 jni_CallStaticObjectMethodV, 3577 jni_CallStaticObjectMethodA, 3578 jni_CallStaticBooleanMethod, 3579 jni_CallStaticBooleanMethodV, 3580 jni_CallStaticBooleanMethodA, 3581 jni_CallStaticByteMethod, 3582 jni_CallStaticByteMethodV, 3583 jni_CallStaticByteMethodA, 3584 jni_CallStaticCharMethod, 3585 jni_CallStaticCharMethodV, 3586 jni_CallStaticCharMethodA, 3587 jni_CallStaticShortMethod, 3588 jni_CallStaticShortMethodV, 3589 jni_CallStaticShortMethodA, 3590 jni_CallStaticIntMethod, 3591 jni_CallStaticIntMethodV, 3592 jni_CallStaticIntMethodA, 3593 jni_CallStaticLongMethod, 3594 jni_CallStaticLongMethodV, 3595 jni_CallStaticLongMethodA, 3596 jni_CallStaticFloatMethod, 3597 jni_CallStaticFloatMethodV, 3598 jni_CallStaticFloatMethodA, 3599 jni_CallStaticDoubleMethod, 3600 jni_CallStaticDoubleMethodV, 3601 jni_CallStaticDoubleMethodA, 3602 jni_CallStaticVoidMethod, 3603 jni_CallStaticVoidMethodV, 3604 jni_CallStaticVoidMethodA, 3605 3606 jni_GetStaticFieldID, 3607 3608 jni_GetStaticObjectField, 3609 jni_GetStaticBooleanField, 3610 jni_GetStaticByteField, 3611 jni_GetStaticCharField, 3612 jni_GetStaticShortField, 3613 jni_GetStaticIntField, 3614 jni_GetStaticLongField, 3615 jni_GetStaticFloatField, 3616 jni_GetStaticDoubleField, 3617 3618 jni_SetStaticObjectField, 3619 jni_SetStaticBooleanField, 3620 jni_SetStaticByteField, 3621 jni_SetStaticCharField, 3622 jni_SetStaticShortField, 3623 jni_SetStaticIntField, 3624 jni_SetStaticLongField, 3625 jni_SetStaticFloatField, 3626 jni_SetStaticDoubleField, 3627 3628 jni_NewString, 3629 jni_GetStringLength, 3630 jni_GetStringChars, 3631 jni_ReleaseStringChars, 3632 3633 jni_NewStringUTF, 3634 jni_GetStringUTFLength, 3635 jni_GetStringUTFChars, 3636 jni_ReleaseStringUTFChars, 3637 3638 jni_GetArrayLength, 3639 3640 jni_NewObjectArray, 3641 jni_GetObjectArrayElement, 3642 jni_SetObjectArrayElement, 3643 3644 jni_NewBooleanArray, 3645 jni_NewByteArray, 3646 jni_NewCharArray, 3647 jni_NewShortArray, 3648 jni_NewIntArray, 3649 jni_NewLongArray, 3650 jni_NewFloatArray, 3651 jni_NewDoubleArray, 3652 3653 jni_GetBooleanArrayElements, 3654 jni_GetByteArrayElements, 3655 jni_GetCharArrayElements, 3656 jni_GetShortArrayElements, 3657 jni_GetIntArrayElements, 3658 jni_GetLongArrayElements, 3659 jni_GetFloatArrayElements, 3660 jni_GetDoubleArrayElements, 3661 3662 jni_ReleaseBooleanArrayElements, 3663 jni_ReleaseByteArrayElements, 3664 jni_ReleaseCharArrayElements, 3665 jni_ReleaseShortArrayElements, 3666 jni_ReleaseIntArrayElements, 3667 jni_ReleaseLongArrayElements, 3668 jni_ReleaseFloatArrayElements, 3669 jni_ReleaseDoubleArrayElements, 3670 3671 jni_GetBooleanArrayRegion, 3672 jni_GetByteArrayRegion, 3673 jni_GetCharArrayRegion, 3674 jni_GetShortArrayRegion, 3675 jni_GetIntArrayRegion, 3676 jni_GetLongArrayRegion, 3677 jni_GetFloatArrayRegion, 3678 jni_GetDoubleArrayRegion, 3679 3680 jni_SetBooleanArrayRegion, 3681 jni_SetByteArrayRegion, 3682 jni_SetCharArrayRegion, 3683 jni_SetShortArrayRegion, 3684 jni_SetIntArrayRegion, 3685 jni_SetLongArrayRegion, 3686 jni_SetFloatArrayRegion, 3687 jni_SetDoubleArrayRegion, 3688 3689 jni_RegisterNatives, 3690 jni_UnregisterNatives, 3691 3692 jni_MonitorEnter, 3693 jni_MonitorExit, 3694 3695 jni_GetJavaVM, 3696 3697 jni_GetStringRegion, 3698 jni_GetStringUTFRegion, 3699 3700 jni_GetPrimitiveArrayCritical, 3701 jni_ReleasePrimitiveArrayCritical, 3702 3703 jni_GetStringCritical, 3704 jni_ReleaseStringCritical, 3705 3706 jni_NewWeakGlobalRef, 3707 jni_DeleteWeakGlobalRef, 3708 3709 jni_ExceptionCheck, 3710 3711 jni_NewDirectByteBuffer, 3712 jni_GetDirectBufferAddress, 3713 jni_GetDirectBufferCapacity, 3714 3715 // New 1_6 features 3716 3717 jni_GetObjectRefType 3718}; 3719 3720 3721// For jvmti use to modify jni function table. 3722// Java threads in native contiues to run until it is transitioned 3723// to VM at safepoint. Before the transition or before it is blocked 3724// for safepoint it may access jni function table. VM could crash if 3725// any java thread access the jni function table in the middle of memcpy. 3726// To avoid this each function pointers are copied automically. 3727void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3728 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3729 intptr_t *a = (intptr_t *) jni_functions(); 3730 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3731 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3732 Atomic::store_ptr(*b++, a++); 3733 } 3734} 3735 3736void quicken_jni_functions() { 3737 // Replace Get<Primitive>Field with fast versions 3738 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3739 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls 3740#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3741 // windows x86 currently needs SEH wrapper and the gain of the fast 3742 // versions currently isn't certain for server vm on uniprocessor. 3743 && os::is_MP() 3744#endif 3745 ) { 3746 address func; 3747 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3748 if (func != (address)-1) { 3749 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3750 } 3751 func = JNI_FastGetField::generate_fast_get_byte_field(); 3752 if (func != (address)-1) { 3753 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3754 } 3755 func = JNI_FastGetField::generate_fast_get_char_field(); 3756 if (func != (address)-1) { 3757 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3758 } 3759 func = JNI_FastGetField::generate_fast_get_short_field(); 3760 if (func != (address)-1) { 3761 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3762 } 3763 func = JNI_FastGetField::generate_fast_get_int_field(); 3764 if (func != (address)-1) { 3765 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3766 } 3767 func = JNI_FastGetField::generate_fast_get_long_field(); 3768 if (func != (address)-1) { 3769 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3770 } 3771 func = JNI_FastGetField::generate_fast_get_float_field(); 3772 if (func != (address)-1) { 3773 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3774 } 3775 func = JNI_FastGetField::generate_fast_get_double_field(); 3776 if (func != (address)-1) { 3777 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3778 } 3779 } 3780} 3781 3782// Returns the function structure 3783struct JNINativeInterface_* jni_functions() { 3784#if INCLUDE_JNI_CHECK 3785 if (CheckJNICalls) return jni_functions_check(); 3786#endif // INCLUDE_JNI_CHECK 3787 return &jni_NativeInterface; 3788} 3789 3790// Returns the function structure 3791struct JNINativeInterface_* jni_functions_nocheck() { 3792 return &jni_NativeInterface; 3793} 3794 3795 3796// Invocation API 3797 3798 3799// Forward declaration 3800extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3801 3802// Global invocation API vars 3803volatile jint vm_created = 0; 3804// Indicate whether it is safe to recreate VM 3805volatile jint safe_to_recreate_vm = 1; 3806struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3807 3808 3809#define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3810enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3811 3812DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3813 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3814 3815_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3816 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3817 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3818 jint ret = JNI_ERR; 3819 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3820 3821 if (Threads::is_supported_jni_version(args->version)) { 3822 ret = JNI_OK; 3823 } 3824 // 1.1 style no longer supported in hotspot. 3825 // According the JNI spec, we should update args->version on return. 3826 // We also use the structure to communicate with launcher about default 3827 // stack size. 3828 if (args->version == JNI_VERSION_1_1) { 3829 args->version = JNI_VERSION_1_2; 3830 // javaStackSize is int in arguments structure 3831 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3832 args->javaStackSize = (jint)(ThreadStackSize * K); 3833 } 3834 return ret; 3835} 3836 3837#ifndef PRODUCT 3838 3839#include "gc_implementation/shared/gcTimer.hpp" 3840#include "gc_interface/collectedHeap.hpp" 3841#if INCLUDE_ALL_GCS 3842#include "gc_implementation/g1/heapRegionRemSet.hpp" 3843#endif 3844#include "memory/guardedMemory.hpp" 3845#include "utilities/quickSort.hpp" 3846#include "utilities/ostream.hpp" 3847#if INCLUDE_VM_STRUCTS 3848#include "runtime/vmStructs.hpp" 3849#endif 3850 3851#define run_unit_test(unit_test_function_call) \ 3852 tty->print_cr("Running test: " #unit_test_function_call); \ 3853 unit_test_function_call 3854 3855// Forward declaration 3856void TestReservedSpace_test(); 3857void TestReserveMemorySpecial_test(); 3858void TestVirtualSpace_test(); 3859void TestMetaspaceAux_test(); 3860void TestMetachunk_test(); 3861void TestVirtualSpaceNode_test(); 3862void TestNewSize_test(); 3863void TestOldSize_test(); 3864void TestKlass_test(); 3865void TestBitMap_test(); 3866void TestAsUtf8(); 3867#if INCLUDE_ALL_GCS 3868void TestOldFreeSpaceCalculation_test(); 3869void TestG1BiasedArray_test(); 3870void TestBufferingOopClosure_test(); 3871void TestCodeCacheRemSet_test(); 3872#endif 3873 3874void execute_internal_vm_tests() { 3875 if (ExecuteInternalVMTests) { 3876 tty->print_cr("Running internal VM tests"); 3877 run_unit_test(TestReservedSpace_test()); 3878 run_unit_test(TestReserveMemorySpecial_test()); 3879 run_unit_test(TestVirtualSpace_test()); 3880 run_unit_test(TestMetaspaceAux_test()); 3881 run_unit_test(TestMetachunk_test()); 3882 run_unit_test(TestVirtualSpaceNode_test()); 3883 run_unit_test(GlobalDefinitions::test_globals()); 3884 run_unit_test(GCTimerAllTest::all()); 3885 run_unit_test(arrayOopDesc::test_max_array_length()); 3886 run_unit_test(CollectedHeap::test_is_in()); 3887 run_unit_test(QuickSort::test_quick_sort()); 3888 run_unit_test(GuardedMemory::test_guarded_memory()); 3889 run_unit_test(AltHashing::test_alt_hash()); 3890 run_unit_test(test_loggc_filename()); 3891 run_unit_test(TestNewSize_test()); 3892 run_unit_test(TestOldSize_test()); 3893 run_unit_test(TestKlass_test()); 3894 run_unit_test(TestBitMap_test()); 3895 run_unit_test(TestAsUtf8()); 3896#if INCLUDE_VM_STRUCTS 3897 run_unit_test(VMStructs::test()); 3898#endif 3899#if INCLUDE_ALL_GCS 3900 run_unit_test(TestOldFreeSpaceCalculation_test()); 3901 run_unit_test(TestG1BiasedArray_test()); 3902 run_unit_test(HeapRegionRemSet::test_prt()); 3903 run_unit_test(TestBufferingOopClosure_test()); 3904 run_unit_test(TestCodeCacheRemSet_test()); 3905#endif 3906 tty->print_cr("All internal VM tests passed"); 3907 } 3908} 3909 3910#undef run_unit_test 3911 3912#endif 3913 3914DT_RETURN_MARK_DECL(CreateJavaVM, jint 3915 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3916 3917_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 3918 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3919 3920 jint result = JNI_ERR; 3921 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3922 3923 // We're about to use Atomic::xchg for synchronization. Some Zero 3924 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3925 // but __sync_lock_test_and_set is not guaranteed to do what we want 3926 // on all architectures. So we check it works before relying on it. 3927#if defined(ZERO) && defined(ASSERT) 3928 { 3929 jint a = 0xcafebabe; 3930 jint b = Atomic::xchg(0xdeadbeef, &a); 3931 void *c = &a; 3932 void *d = Atomic::xchg_ptr(&b, &c); 3933 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3934 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3935 } 3936#endif // ZERO && ASSERT 3937 3938 // At the moment it's only possible to have one Java VM, 3939 // since some of the runtime state is in global variables. 3940 3941 // We cannot use our mutex locks here, since they only work on 3942 // Threads. We do an atomic compare and exchange to ensure only 3943 // one thread can call this method at a time 3944 3945 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3946 // the add/dec implementations are dependent on whether we are running 3947 // on a multiprocessor, and at this stage of initialization the os::is_MP 3948 // function used to determine this will always return false. Atomic::xchg 3949 // does not have this problem. 3950 if (Atomic::xchg(1, &vm_created) == 1) { 3951 return JNI_EEXIST; // already created, or create attempt in progress 3952 } 3953 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3954 return JNI_ERR; // someone tried and failed and retry not allowed. 3955 } 3956 3957 assert(vm_created == 1, "vm_created is true during the creation"); 3958 3959 /** 3960 * Certain errors during initialization are recoverable and do not 3961 * prevent this method from being called again at a later time 3962 * (perhaps with different arguments). However, at a certain 3963 * point during initialization if an error occurs we cannot allow 3964 * this function to be called again (or it will crash). In those 3965 * situations, the 'canTryAgain' flag is set to false, which atomically 3966 * sets safe_to_recreate_vm to 1, such that any new call to 3967 * JNI_CreateJavaVM will immediately fail using the above logic. 3968 */ 3969 bool can_try_again = true; 3970 3971 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3972 if (result == JNI_OK) { 3973 JavaThread *thread = JavaThread::current(); 3974 assert(!thread->has_pending_exception(), "should have returned not OK"); 3975 /* thread is thread_in_vm here */ 3976 *vm = (JavaVM *)(&main_vm); 3977 *(JNIEnv**)penv = thread->jni_environment(); 3978 3979 // Tracks the time application was running before GC 3980 RuntimeService::record_application_start(); 3981 3982 // Notify JVMTI 3983 if (JvmtiExport::should_post_thread_life()) { 3984 JvmtiExport::post_thread_start(thread); 3985 } 3986 3987 EventThreadStart event; 3988 if (event.should_commit()) { 3989 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 3990 event.commit(); 3991 } 3992 3993#ifndef PRODUCT 3994 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED 3995 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f() 3996 #endif 3997 3998 // Check if we should compile all classes on bootclasspath 3999 if (CompileTheWorld) ClassLoader::compile_the_world(); 4000 if (ReplayCompiles) ciReplay::replay(thread); 4001 4002 // Some platforms (like Win*) need a wrapper around these test 4003 // functions in order to properly handle error conditions. 4004 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler); 4005 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests); 4006#endif 4007 4008 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4009 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4010 } else { 4011 // If create_vm exits because of a pending exception, exit with that 4012 // exception. In the future when we figure out how to reclaim memory, 4013 // we may be able to exit with JNI_ERR and allow the calling application 4014 // to continue. 4015 if (Universe::is_fully_initialized()) { 4016 // otherwise no pending exception possible - VM will already have aborted 4017 JavaThread* THREAD = JavaThread::current(); 4018 if (HAS_PENDING_EXCEPTION) { 4019 HandleMark hm; 4020 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4021 } 4022 } 4023 4024 if (can_try_again) { 4025 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4026 safe_to_recreate_vm = 1; 4027 } 4028 4029 // Creation failed. We must reset vm_created 4030 *vm = 0; 4031 *(JNIEnv**)penv = 0; 4032 // reset vm_created last to avoid race condition. Use OrderAccess to 4033 // control both compiler and architectural-based reordering. 4034 OrderAccess::release_store(&vm_created, 0); 4035 } 4036 4037 return result; 4038} 4039 4040 4041_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4042 // See bug 4367188, the wrapper can sometimes cause VM crashes 4043 // JNIWrapper("GetCreatedJavaVMs"); 4044 4045 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4046 4047 if (vm_created) { 4048 if (numVMs != NULL) *numVMs = 1; 4049 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4050 } else { 4051 if (numVMs != NULL) *numVMs = 0; 4052 } 4053 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4054 return JNI_OK; 4055} 4056 4057extern "C" { 4058 4059DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4060 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4061 4062jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4063 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4064 jint res = JNI_ERR; 4065 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4066 4067 if (!vm_created) { 4068 res = JNI_ERR; 4069 return res; 4070 } 4071 4072 JNIWrapper("DestroyJavaVM"); 4073 JNIEnv *env; 4074 JavaVMAttachArgs destroyargs; 4075 destroyargs.version = CurrentVersion; 4076 destroyargs.name = (char *)"DestroyJavaVM"; 4077 destroyargs.group = NULL; 4078 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4079 if (res != JNI_OK) { 4080 return res; 4081 } 4082 4083 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4084 JavaThread* thread = JavaThread::current(); 4085 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4086 if (Threads::destroy_vm()) { 4087 // Should not change thread state, VM is gone 4088 vm_created = false; 4089 res = JNI_OK; 4090 return res; 4091 } else { 4092 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4093 res = JNI_ERR; 4094 return res; 4095 } 4096} 4097 4098 4099static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4100 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4101 4102 // Check below commented out from JDK1.2fcs as well 4103 /* 4104 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4105 return JNI_EVERSION; 4106 } 4107 */ 4108 4109 Thread* t = ThreadLocalStorage::get_thread_slow(); 4110 if (t != NULL) { 4111 // If the thread has been attached this operation is a no-op 4112 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4113 return JNI_OK; 4114 } 4115 4116 // Create a thread and mark it as attaching so it will be skipped by the 4117 // ThreadsListEnumerator - see CR 6404306 4118 JavaThread* thread = new JavaThread(true); 4119 4120 // Set correct safepoint info. The thread is going to call into Java when 4121 // initializing the Java level thread object. Hence, the correct state must 4122 // be set in order for the Safepoint code to deal with it correctly. 4123 thread->set_thread_state(_thread_in_vm); 4124 // Must do this before initialize_thread_local_storage 4125 thread->record_stack_base_and_size(); 4126 4127 thread->initialize_thread_local_storage(); 4128 4129 if (!os::create_attached_thread(thread)) { 4130 delete thread; 4131 return JNI_ERR; 4132 } 4133 // Enable stack overflow checks 4134 thread->create_stack_guard_pages(); 4135 4136 thread->initialize_tlab(); 4137 4138 thread->cache_global_variables(); 4139 4140 // Crucial that we do not have a safepoint check for this thread, since it has 4141 // not been added to the Thread list yet. 4142 { Threads_lock->lock_without_safepoint_check(); 4143 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4144 // avoid this thread trying to do a GC before it is added to the thread-list 4145 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4146 Threads::add(thread, daemon); 4147 Threads_lock->unlock(); 4148 } 4149 // Create thread group and name info from attach arguments 4150 oop group = NULL; 4151 char* thread_name = NULL; 4152 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4153 group = JNIHandles::resolve(args->group); 4154 thread_name = args->name; // may be NULL 4155 } 4156 if (group == NULL) group = Universe::main_thread_group(); 4157 4158 // Create Java level thread object and attach it to this thread 4159 bool attach_failed = false; 4160 { 4161 EXCEPTION_MARK; 4162 HandleMark hm(THREAD); 4163 Handle thread_group(THREAD, group); 4164 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4165 if (HAS_PENDING_EXCEPTION) { 4166 CLEAR_PENDING_EXCEPTION; 4167 // cleanup outside the handle mark. 4168 attach_failed = true; 4169 } 4170 } 4171 4172 if (attach_failed) { 4173 // Added missing cleanup 4174 thread->cleanup_failed_attach_current_thread(); 4175 return JNI_ERR; 4176 } 4177 4178 // mark the thread as no longer attaching 4179 // this uses a fence to push the change through so we don't have 4180 // to regrab the threads_lock 4181 thread->set_done_attaching_via_jni(); 4182 4183 // Set java thread status. 4184 java_lang_Thread::set_thread_status(thread->threadObj(), 4185 java_lang_Thread::RUNNABLE); 4186 4187 // Notify the debugger 4188 if (JvmtiExport::should_post_thread_life()) { 4189 JvmtiExport::post_thread_start(thread); 4190 } 4191 4192 EventThreadStart event; 4193 if (event.should_commit()) { 4194 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 4195 event.commit(); 4196 } 4197 4198 *(JNIEnv**)penv = thread->jni_environment(); 4199 4200 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4201 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4202 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4203 // needed. 4204 4205 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4206 4207 // Perform any platform dependent FPU setup 4208 os::setup_fpu(); 4209 4210 return JNI_OK; 4211} 4212 4213 4214jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4215 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4216 if (!vm_created) { 4217 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4218 return JNI_ERR; 4219 } 4220 4221 JNIWrapper("AttachCurrentThread"); 4222 jint ret = attach_current_thread(vm, penv, _args, false); 4223 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4224 return ret; 4225} 4226 4227 4228jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4229 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4230 VM_Exit::block_if_vm_exited(); 4231 4232 JNIWrapper("DetachCurrentThread"); 4233 4234 // If the thread has been deattacted the operations is a no-op 4235 if (ThreadLocalStorage::thread() == NULL) { 4236 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4237 return JNI_OK; 4238 } 4239 4240 JavaThread* thread = JavaThread::current(); 4241 if (thread->has_last_Java_frame()) { 4242 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4243 // Can't detach a thread that's running java, that can't work. 4244 return JNI_ERR; 4245 } 4246 4247 // Safepoint support. Have to do call-back to safepoint code, if in the 4248 // middel of a safepoint operation 4249 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4250 4251 // XXX: Note that JavaThread::exit() call below removes the guards on the 4252 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4253 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4254 // of the guards is visible in jni_AttachCurrentThread above, 4255 // the removal of the guards is buried below in JavaThread::exit() 4256 // here. The abstraction should be more symmetrically either exposed 4257 // or hidden (e.g. it could probably be hidden in the same 4258 // (platform-dependent) methods where we do alternate stack 4259 // maintenance work?) 4260 thread->exit(false, JavaThread::jni_detach); 4261 delete thread; 4262 4263 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4264 return JNI_OK; 4265} 4266 4267DT_RETURN_MARK_DECL(GetEnv, jint 4268 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4269 4270jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4271 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4272 jint ret = JNI_ERR; 4273 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4274 4275 if (!vm_created) { 4276 *penv = NULL; 4277 ret = JNI_EDETACHED; 4278 return ret; 4279 } 4280 4281 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4282 return ret; 4283 } 4284 4285#ifndef JVMPI_VERSION_1 4286// need these in order to be polite about older agents 4287#define JVMPI_VERSION_1 ((jint)0x10000001) 4288#define JVMPI_VERSION_1_1 ((jint)0x10000002) 4289#define JVMPI_VERSION_1_2 ((jint)0x10000003) 4290#endif // !JVMPI_VERSION_1 4291 4292 Thread* thread = ThreadLocalStorage::thread(); 4293 if (thread != NULL && thread->is_Java_thread()) { 4294 if (Threads::is_supported_jni_version_including_1_1(version)) { 4295 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4296 ret = JNI_OK; 4297 return ret; 4298 4299 } else if (version == JVMPI_VERSION_1 || 4300 version == JVMPI_VERSION_1_1 || 4301 version == JVMPI_VERSION_1_2) { 4302 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4303 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4304 ret = JNI_EVERSION; 4305 return ret; 4306 } else if (JvmtiExport::is_jvmdi_version(version)) { 4307 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4308 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4309 ret = JNI_EVERSION; 4310 return ret; 4311 } else { 4312 *penv = NULL; 4313 ret = JNI_EVERSION; 4314 return ret; 4315 } 4316 } else { 4317 *penv = NULL; 4318 ret = JNI_EDETACHED; 4319 return ret; 4320 } 4321} 4322 4323 4324jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4325 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4326 if (!vm_created) { 4327 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4328 return JNI_ERR; 4329 } 4330 4331 JNIWrapper("AttachCurrentThreadAsDaemon"); 4332 jint ret = attach_current_thread(vm, penv, _args, true); 4333 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4334 return ret; 4335} 4336 4337 4338} // End extern "C" 4339 4340const struct JNIInvokeInterface_ jni_InvokeInterface = { 4341 NULL, 4342 NULL, 4343 NULL, 4344 4345 jni_DestroyJavaVM, 4346 jni_AttachCurrentThread, 4347 jni_DetachCurrentThread, 4348 jni_GetEnv, 4349 jni_AttachCurrentThreadAsDaemon 4350}; 4351