jni.cpp revision 11857:d0fbf661cc16
1/* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#include "precompiled.hpp" 27#include "ci/ciReplay.hpp" 28#include "classfile/altHashing.hpp" 29#include "classfile/classFileStream.hpp" 30#include "classfile/classLoader.hpp" 31#include "classfile/javaClasses.hpp" 32#include "classfile/javaClasses.inline.hpp" 33#include "classfile/modules.hpp" 34#include "classfile/symbolTable.hpp" 35#include "classfile/systemDictionary.hpp" 36#include "classfile/vmSymbols.hpp" 37#include "gc/shared/gcLocker.inline.hpp" 38#include "interpreter/linkResolver.hpp" 39#include "memory/allocation.hpp" 40#include "memory/allocation.inline.hpp" 41#include "memory/oopFactory.hpp" 42#include "memory/resourceArea.hpp" 43#include "memory/universe.inline.hpp" 44#include "oops/instanceKlass.hpp" 45#include "oops/instanceOop.hpp" 46#include "oops/markOop.hpp" 47#include "oops/method.hpp" 48#include "oops/objArrayKlass.hpp" 49#include "oops/objArrayOop.inline.hpp" 50#include "oops/oop.inline.hpp" 51#include "oops/symbol.hpp" 52#include "oops/typeArrayKlass.hpp" 53#include "oops/typeArrayOop.hpp" 54#include "prims/jni.h" 55#include "prims/jniCheck.hpp" 56#include "prims/jniExport.hpp" 57#include "prims/jniFastGetField.hpp" 58#include "prims/jvm.h" 59#include "prims/jvm_misc.hpp" 60#include "prims/jvmtiExport.hpp" 61#include "prims/jvmtiThreadState.hpp" 62#include "runtime/atomic.hpp" 63#include "runtime/compilationPolicy.hpp" 64#include "runtime/fieldDescriptor.hpp" 65#include "runtime/fprofiler.hpp" 66#include "runtime/handles.inline.hpp" 67#include "runtime/interfaceSupport.hpp" 68#include "runtime/java.hpp" 69#include "runtime/javaCalls.hpp" 70#include "runtime/jfieldIDWorkaround.hpp" 71#include "runtime/orderAccess.inline.hpp" 72#include "runtime/reflection.hpp" 73#include "runtime/sharedRuntime.hpp" 74#include "runtime/signature.hpp" 75#include "runtime/thread.inline.hpp" 76#include "runtime/vm_operations.hpp" 77#include "services/memTracker.hpp" 78#include "services/runtimeService.hpp" 79#include "trace/traceMacros.hpp" 80#include "trace/tracing.hpp" 81#include "utilities/defaultStream.hpp" 82#include "utilities/dtrace.hpp" 83#include "utilities/events.hpp" 84#include "utilities/histogram.hpp" 85#include "utilities/internalVMTests.hpp" 86#include "utilities/macros.hpp" 87#if INCLUDE_ALL_GCS 88#include "gc/g1/g1SATBCardTableModRefBS.hpp" 89#endif // INCLUDE_ALL_GCS 90#if INCLUDE_JVMCI 91#include "jvmci/jvmciCompiler.hpp" 92#include "jvmci/jvmciRuntime.hpp" 93#endif 94 95static jint CurrentVersion = JNI_VERSION_9; 96 97#ifdef _WIN32 98extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); 99#endif 100 101// The DT_RETURN_MARK macros create a scoped object to fire the dtrace 102// '-return' probe regardless of the return path is taken out of the function. 103// Methods that have multiple return paths use this to avoid having to 104// instrument each return path. Methods that use CHECK or THROW must use this 105// since those macros can cause an immedate uninstrumented return. 106// 107// In order to get the return value, a reference to the variable containing 108// the return value must be passed to the contructor of the object, and 109// the return value must be set before return (since the mark object has 110// a reference to it). 111// 112// Example: 113// DT_RETURN_MARK_DECL(SomeFunc, int); 114// JNI_ENTRY(int, SomeFunc, ...) 115// int return_value = 0; 116// DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); 117// foo(CHECK_0) 118// return_value = 5; 119// return return_value; 120// JNI_END 121#define DT_RETURN_MARK_DECL(name, type, probe) \ 122 DTRACE_ONLY( \ 123 class DTraceReturnProbeMark_##name { \ 124 public: \ 125 const type& _ret_ref; \ 126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ 127 ~DTraceReturnProbeMark_##name() { \ 128 probe; \ 129 } \ 130 } \ 131 ) 132// Void functions are simpler since there's no return value 133#define DT_VOID_RETURN_MARK_DECL(name, probe) \ 134 DTRACE_ONLY( \ 135 class DTraceReturnProbeMark_##name { \ 136 public: \ 137 ~DTraceReturnProbeMark_##name() { \ 138 probe; \ 139 } \ 140 } \ 141 ) 142 143// Place these macros in the function to mark the return. Non-void 144// functions need the type and address of the return value. 145#define DT_RETURN_MARK(name, type, ref) \ 146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) 147#define DT_VOID_RETURN_MARK(name) \ 148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) 149 150 151// Use these to select distinct code for floating-point vs. non-floating point 152// situations. Used from within common macros where we need slightly 153// different behavior for Float/Double 154#define FP_SELECT_Boolean(intcode, fpcode) intcode 155#define FP_SELECT_Byte(intcode, fpcode) intcode 156#define FP_SELECT_Char(intcode, fpcode) intcode 157#define FP_SELECT_Short(intcode, fpcode) intcode 158#define FP_SELECT_Object(intcode, fpcode) intcode 159#define FP_SELECT_Int(intcode, fpcode) intcode 160#define FP_SELECT_Long(intcode, fpcode) intcode 161#define FP_SELECT_Float(intcode, fpcode) fpcode 162#define FP_SELECT_Double(intcode, fpcode) fpcode 163#define FP_SELECT(TypeName, intcode, fpcode) \ 164 FP_SELECT_##TypeName(intcode, fpcode) 165 166// Choose DT_RETURN_MARK macros based on the type: float/double -> void 167// (dtrace doesn't do FP yet) 168#define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \ 169 FP_SELECT(TypeName, \ 170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) ) 171#define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ 172 FP_SELECT(TypeName, \ 173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) 174 175 176// out-of-line helpers for class jfieldIDWorkaround: 177 178bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) { 179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { 180 uintptr_t as_uint = (uintptr_t) id; 181 intptr_t offset = raw_instance_offset(id); 182 if (is_checked_jfieldID(id)) { 183 if (!klass_hash_ok(k, id)) { 184 return false; 185 } 186 } 187 return InstanceKlass::cast(k)->contains_field_offset(offset); 188 } else { 189 JNIid* result = (JNIid*) id; 190#ifdef ASSERT 191 return result != NULL && result->is_static_field_id(); 192#else 193 return result != NULL; 194#endif 195 } 196} 197 198 199intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) { 200 if (offset <= small_offset_mask) { 201 Klass* field_klass = k; 202 Klass* super_klass = field_klass->super(); 203 // With compressed oops the most super class with nonstatic fields would 204 // be the owner of fields embedded in the header. 205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() && 206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) { 207 field_klass = super_klass; // super contains the field also 208 super_klass = field_klass->super(); 209 } 210 debug_only(NoSafepointVerifier nosafepoint;) 211 uintptr_t klass_hash = field_klass->identity_hash(); 212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; 213 } else { 214#if 0 215 #ifndef PRODUCT 216 { 217 ResourceMark rm; 218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name()); 219 } 220 #endif 221#endif 222 return 0; 223 } 224} 225 226bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) { 227 uintptr_t as_uint = (uintptr_t) id; 228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; 229 do { 230 debug_only(NoSafepointVerifier nosafepoint;) 231 // Could use a non-blocking query for identity_hash here... 232 if ((k->identity_hash() & klass_mask) == klass_hash) 233 return true; 234 k = k->super(); 235 } while (k != NULL); 236 return false; 237} 238 239void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) { 240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); 241 uintptr_t as_uint = (uintptr_t) id; 242 intptr_t offset = raw_instance_offset(id); 243 if (VerifyJNIFields) { 244 if (is_checked_jfieldID(id)) { 245 guarantee(klass_hash_ok(k, id), 246 "Bug in native code: jfieldID class must match object"); 247 } else { 248#if 0 249 #ifndef PRODUCT 250 if (Verbose) { 251 ResourceMark rm; 252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name()); 253 } 254 #endif 255#endif 256 } 257 } 258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset), 259 "Bug in native code: jfieldID offset must address interior of object"); 260} 261 262// Wrapper to trace JNI functions 263 264#ifdef ASSERT 265 Histogram* JNIHistogram; 266 static volatile jint JNIHistogram_lock = 0; 267 268 class JNIHistogramElement : public HistogramElement { 269 public: 270 JNIHistogramElement(const char* name); 271 }; 272 273 JNIHistogramElement::JNIHistogramElement(const char* elementName) { 274 _name = elementName; 275 uintx count = 0; 276 277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { 278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { 279 count +=1; 280 if ( (WarnOnStalledSpinLock > 0) 281 && (count % WarnOnStalledSpinLock == 0)) { 282 warning("JNIHistogram_lock seems to be stalled"); 283 } 284 } 285 } 286 287 288 if(JNIHistogram == NULL) 289 JNIHistogram = new Histogram("JNI Call Counts",100); 290 291 JNIHistogram->add_element(this); 292 Atomic::dec(&JNIHistogram_lock); 293 } 294 295 #define JNICountWrapper(arg) \ 296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ 297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ 298 if (e != NULL) e->increment_count() 299 #define JNIWrapper(arg) JNICountWrapper(arg); 300#else 301 #define JNIWrapper(arg) 302#endif 303 304 305// Implementation of JNI entries 306 307DT_RETURN_MARK_DECL(DefineClass, jclass 308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref)); 309 310JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, 311 const jbyte *buf, jsize bufLen)) 312 JNIWrapper("DefineClass"); 313 314 HOTSPOT_JNI_DEFINECLASS_ENTRY( 315 env, (char*) name, loaderRef, (char*) buf, bufLen); 316 317 jclass cls = NULL; 318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); 319 320 TempNewSymbol class_name = NULL; 321 // Since exceptions can be thrown, class initialization can take place 322 // if name is NULL no check for class name in .class stream has to be made. 323 if (name != NULL) { 324 const int str_len = (int)strlen(name); 325 if (str_len > Symbol::max_length()) { 326 // It's impossible to create this class; the name cannot fit 327 // into the constant pool. 328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 329 } 330 class_name = SymbolTable::new_symbol(name, CHECK_NULL); 331 } 332 ResourceMark rm(THREAD); 333 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify); 334 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); 335 336 if (UsePerfData && !class_loader.is_null()) { 337 // check whether the current caller thread holds the lock or not. 338 // If not, increment the corresponding counter 339 if (ObjectSynchronizer:: 340 query_lock_ownership((JavaThread*)THREAD, class_loader) != 341 ObjectSynchronizer::owner_self) { 342 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); 343 } 344 } 345 Klass* k = SystemDictionary::resolve_from_stream(class_name, 346 class_loader, 347 Handle(), 348 &st, 349 CHECK_NULL); 350 351 if (log_is_enabled(Debug, class, resolve) && k != NULL) { 352 trace_class_resolution(k); 353 } 354 355 cls = (jclass)JNIHandles::make_local( 356 env, k->java_mirror()); 357 return cls; 358JNI_END 359 360 361 362static bool first_time_FindClass = true; 363 364DT_RETURN_MARK_DECL(FindClass, jclass 365 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref)); 366 367JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) 368 JNIWrapper("FindClass"); 369 370 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name); 371 372 jclass result = NULL; 373 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); 374 375 // Remember if we are the first invocation of jni_FindClass 376 bool first_time = first_time_FindClass; 377 first_time_FindClass = false; 378 379 // Sanity check the name: it cannot be null or larger than the maximum size 380 // name we can fit in the constant pool. 381 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 382 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 383 } 384 385 //%note jni_3 386 Handle loader; 387 Handle protection_domain; 388 // Find calling class 389 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); 390 if (k.not_null()) { 391 loader = Handle(THREAD, k->class_loader()); 392 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed 393 // in the correct class context. 394 if (loader.is_null() && 395 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { 396 JavaValue result(T_OBJECT); 397 JavaCalls::call_static(&result, k, 398 vmSymbols::getFromClass_name(), 399 vmSymbols::void_class_signature(), 400 thread); 401 if (HAS_PENDING_EXCEPTION) { 402 Handle ex(thread, thread->pending_exception()); 403 CLEAR_PENDING_EXCEPTION; 404 THROW_HANDLE_0(ex); 405 } 406 oop mirror = (oop) result.get_jobject(); 407 loader = Handle(THREAD, 408 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader()); 409 protection_domain = Handle(THREAD, 410 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain()); 411 } 412 } else { 413 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. 414 loader = Handle(THREAD, SystemDictionary::java_system_loader()); 415 } 416 417 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 418 result = find_class_from_class_loader(env, sym, true, loader, 419 protection_domain, true, thread); 420 421 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 422 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 423 } 424 425 // If we were the first invocation of jni_FindClass, we enable compilation again 426 // rather than just allowing invocation counter to overflow and decay. 427 // Controlled by flag DelayCompilationDuringStartup. 428 if (first_time && !CompileTheWorld) 429 CompilationPolicy::completed_vm_startup(); 430 431 return result; 432JNI_END 433 434DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID 435 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref)); 436 437JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) 438 JNIWrapper("FromReflectedMethod"); 439 440 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method); 441 442 jmethodID ret = NULL; 443 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); 444 445 // method is a handle to a java.lang.reflect.Method object 446 oop reflected = JNIHandles::resolve_non_null(method); 447 oop mirror = NULL; 448 int slot = 0; 449 450 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 451 mirror = java_lang_reflect_Constructor::clazz(reflected); 452 slot = java_lang_reflect_Constructor::slot(reflected); 453 } else { 454 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); 455 mirror = java_lang_reflect_Method::clazz(reflected); 456 slot = java_lang_reflect_Method::slot(reflected); 457 } 458 Klass* k = java_lang_Class::as_Klass(mirror); 459 460 KlassHandle k1(THREAD, k); 461 // Make sure class is initialized before handing id's out to methods 462 k1()->initialize(CHECK_NULL); 463 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot); 464 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted 465 return ret; 466JNI_END 467 468DT_RETURN_MARK_DECL(FromReflectedField, jfieldID 469 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref)); 470 471JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) 472 JNIWrapper("FromReflectedField"); 473 474 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field); 475 476 jfieldID ret = NULL; 477 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); 478 479 // field is a handle to a java.lang.reflect.Field object 480 oop reflected = JNIHandles::resolve_non_null(field); 481 oop mirror = java_lang_reflect_Field::clazz(reflected); 482 Klass* k = java_lang_Class::as_Klass(mirror); 483 int slot = java_lang_reflect_Field::slot(reflected); 484 int modifiers = java_lang_reflect_Field::modifiers(reflected); 485 486 KlassHandle k1(THREAD, k); 487 // Make sure class is initialized before handing id's out to fields 488 k1()->initialize(CHECK_NULL); 489 490 // First check if this is a static field 491 if (modifiers & JVM_ACC_STATIC) { 492 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 493 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset); 494 assert(id != NULL, "corrupt Field object"); 495 debug_only(id->set_is_static_field_id();) 496 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 497 ret = jfieldIDWorkaround::to_static_jfieldID(id); 498 return ret; 499 } 500 501 // The slot is the index of the field description in the field-array 502 // The jfieldID is the offset of the field within the object 503 // It may also have hash bits for k, if VerifyJNIFields is turned on. 504 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot ); 505 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); 506 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); 507 return ret; 508JNI_END 509 510 511DT_RETURN_MARK_DECL(ToReflectedMethod, jobject 512 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref)); 513 514JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) 515 JNIWrapper("ToReflectedMethod"); 516 517 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic); 518 519 jobject ret = NULL; 520 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); 521 522 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id)); 523 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); 524 oop reflection_method; 525 if (m->is_initializer()) { 526 reflection_method = Reflection::new_constructor(m, CHECK_NULL); 527 } else { 528 reflection_method = Reflection::new_method(m, false, CHECK_NULL); 529 } 530 ret = JNIHandles::make_local(env, reflection_method); 531 return ret; 532JNI_END 533 534DT_RETURN_MARK_DECL(GetSuperclass, jclass 535 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref)); 536 537JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) 538 JNIWrapper("GetSuperclass"); 539 540 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub); 541 542 jclass obj = NULL; 543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); 544 545 oop mirror = JNIHandles::resolve_non_null(sub); 546 // primitive classes return NULL 547 if (java_lang_Class::is_primitive(mirror)) return NULL; 548 549 // Rules of Class.getSuperClass as implemented by KLass::java_super: 550 // arrays return Object 551 // interfaces return NULL 552 // proper classes return Klass::super() 553 Klass* k = java_lang_Class::as_Klass(mirror); 554 if (k->is_interface()) return NULL; 555 556 // return mirror for superclass 557 Klass* super = k->java_super(); 558 // super2 is the value computed by the compiler's getSuperClass intrinsic: 559 debug_only(Klass* super2 = ( k->is_array_klass() 560 ? SystemDictionary::Object_klass() 561 : k->super() ) ); 562 assert(super == super2, 563 "java_super computation depends on interface, array, other super"); 564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror()); 565 return obj; 566JNI_END 567 568JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) 569 JNIWrapper("IsSubclassOf"); 570 571 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super); 572 573 oop sub_mirror = JNIHandles::resolve_non_null(sub); 574 oop super_mirror = JNIHandles::resolve_non_null(super); 575 if (java_lang_Class::is_primitive(sub_mirror) || 576 java_lang_Class::is_primitive(super_mirror)) { 577 jboolean ret = (sub_mirror == super_mirror); 578 579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 580 return ret; 581 } 582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror); 583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror); 584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); 585 jboolean ret = sub_klass->is_subtype_of(super_klass) ? 586 JNI_TRUE : JNI_FALSE; 587 588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret); 589 return ret; 590JNI_END 591 592 593DT_RETURN_MARK_DECL(Throw, jint 594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref)); 595 596JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) 597 JNIWrapper("Throw"); 598 599 HOTSPOT_JNI_THROW_ENTRY(env, obj); 600 601 jint ret = JNI_OK; 602 DT_RETURN_MARK(Throw, jint, (const jint&)ret); 603 604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); 605 ShouldNotReachHere(); 606 return 0; // Mute compiler. 607JNI_END 608 609 610DT_RETURN_MARK_DECL(ThrowNew, jint 611 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref)); 612 613JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) 614 JNIWrapper("ThrowNew"); 615 616 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message); 617 618 jint ret = JNI_OK; 619 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); 620 621 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 622 Symbol* name = k->name(); 623 Handle class_loader (THREAD, k->class_loader()); 624 Handle protection_domain (THREAD, k->protection_domain()); 625 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); 626 ShouldNotReachHere(); 627 return 0; // Mute compiler. 628JNI_END 629 630 631// JNI functions only transform a pending async exception to a synchronous 632// exception in ExceptionOccurred and ExceptionCheck calls, since 633// delivering an async exception in other places won't change the native 634// code's control flow and would be harmful when native code further calls 635// JNI functions with a pending exception. Async exception is also checked 636// during the call, so ExceptionOccurred/ExceptionCheck won't return 637// false but deliver the async exception at the very end during 638// state transition. 639 640static void jni_check_async_exceptions(JavaThread *thread) { 641 assert(thread == Thread::current(), "must be itself"); 642 thread->check_and_handle_async_exceptions(); 643} 644 645JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) 646 JNIWrapper("ExceptionOccurred"); 647 648 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env); 649 650 jni_check_async_exceptions(thread); 651 oop exception = thread->pending_exception(); 652 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); 653 654 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret); 655 return ret; 656JNI_END 657 658 659JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) 660 JNIWrapper("ExceptionDescribe"); 661 662 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env); 663 664 if (thread->has_pending_exception()) { 665 Handle ex(thread, thread->pending_exception()); 666 thread->clear_pending_exception(); 667 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { 668 // Don't print anything if we are being killed. 669 } else { 670 jio_fprintf(defaultStream::error_stream(), "Exception "); 671 if (thread != NULL && thread->threadObj() != NULL) { 672 ResourceMark rm(THREAD); 673 jio_fprintf(defaultStream::error_stream(), 674 "in thread \"%s\" ", thread->get_thread_name()); 675 } 676 if (ex->is_a(SystemDictionary::Throwable_klass())) { 677 JavaValue result(T_VOID); 678 JavaCalls::call_virtual(&result, 679 ex, 680 KlassHandle(THREAD, 681 SystemDictionary::Throwable_klass()), 682 vmSymbols::printStackTrace_name(), 683 vmSymbols::void_method_signature(), 684 THREAD); 685 // If an exception is thrown in the call it gets thrown away. Not much 686 // we can do with it. The native code that calls this, does not check 687 // for the exception - hence, it might still be in the thread when DestroyVM gets 688 // called, potentially causing a few asserts to trigger - since no pending exception 689 // is expected. 690 CLEAR_PENDING_EXCEPTION; 691 } else { 692 ResourceMark rm(THREAD); 693 jio_fprintf(defaultStream::error_stream(), 694 ". Uncaught exception of type %s.", 695 ex->klass()->external_name()); 696 } 697 } 698 } 699 700 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN(); 701JNI_END 702 703 704JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) 705 JNIWrapper("ExceptionClear"); 706 707 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env); 708 709 // The jni code might be using this API to clear java thrown exception. 710 // So just mark jvmti thread exception state as exception caught. 711 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); 712 if (state != NULL && state->is_exception_detected()) { 713 state->set_exception_caught(); 714 } 715 thread->clear_pending_exception(); 716 717 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN(); 718JNI_END 719 720 721JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) 722 JNIWrapper("FatalError"); 723 724 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg); 725 726 tty->print_cr("FATAL ERROR in native method: %s", msg); 727 thread->print_stack(); 728 os::abort(); // Dump core and abort 729JNI_END 730 731 732JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) 733 JNIWrapper("PushLocalFrame"); 734 735 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity); 736 737 //%note jni_11 738 if (capacity < 0 || 739 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) { 740 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR); 741 return JNI_ERR; 742 } 743 JNIHandleBlock* old_handles = thread->active_handles(); 744 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 745 assert(new_handles != NULL, "should not be NULL"); 746 new_handles->set_pop_frame_link(old_handles); 747 thread->set_active_handles(new_handles); 748 jint ret = JNI_OK; 749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret); 750 return ret; 751JNI_END 752 753 754JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) 755 JNIWrapper("PopLocalFrame"); 756 757 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result); 758 759 //%note jni_11 760 Handle result_handle(thread, JNIHandles::resolve(result)); 761 JNIHandleBlock* old_handles = thread->active_handles(); 762 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 763 if (new_handles != NULL) { 764 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. 765 // This way code will still work if PopLocalFrame is called without a corresponding 766 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise 767 // the release_block call will release the blocks. 768 thread->set_active_handles(new_handles); 769 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below 770 JNIHandleBlock::release_block(old_handles, thread); // may block 771 result = JNIHandles::make_local(thread, result_handle()); 772 } 773 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result); 774 return result; 775JNI_END 776 777 778JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) 779 JNIWrapper("NewGlobalRef"); 780 781 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref); 782 783 Handle ref_handle(thread, JNIHandles::resolve(ref)); 784 jobject ret = JNIHandles::make_global(ref_handle); 785 786 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret); 787 return ret; 788JNI_END 789 790// Must be JNI_ENTRY (with HandleMark) 791JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) 792 JNIWrapper("DeleteGlobalRef"); 793 794 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref); 795 796 JNIHandles::destroy_global(ref); 797 798 HOTSPOT_JNI_DELETEGLOBALREF_RETURN(); 799JNI_END 800 801JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) 802 JNIWrapper("DeleteLocalRef"); 803 804 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj); 805 806 JNIHandles::destroy_local(obj); 807 808 HOTSPOT_JNI_DELETELOCALREF_RETURN(); 809JNI_END 810 811JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) 812 JNIWrapper("IsSameObject"); 813 814 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2); 815 816 oop a = JNIHandles::resolve(r1); 817 oop b = JNIHandles::resolve(r2); 818 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; 819 820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret); 821 return ret; 822JNI_END 823 824 825JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) 826 JNIWrapper("NewLocalRef"); 827 828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref); 829 830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); 831 832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret); 833 return ret; 834JNI_END 835 836JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) 837 JNIWrapper("EnsureLocalCapacity"); 838 839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity); 840 841 jint ret; 842 if (capacity >= 0 && 843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) { 844 ret = JNI_OK; 845 } else { 846 ret = JNI_ERR; 847 } 848 849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret); 850 return ret; 851JNI_END 852 853// Return the Handle Type 854JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) 855 JNIWrapper("GetObjectRefType"); 856 857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj); 858 859 jobjectRefType ret; 860 if (JNIHandles::is_local_handle(thread, obj) || 861 JNIHandles::is_frame_handle(thread, obj)) 862 ret = JNILocalRefType; 863 else if (JNIHandles::is_global_handle(obj)) 864 ret = JNIGlobalRefType; 865 else if (JNIHandles::is_weak_global_handle(obj)) 866 ret = JNIWeakGlobalRefType; 867 else 868 ret = JNIInvalidRefType; 869 870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret); 871 return ret; 872JNI_END 873 874 875class JNI_ArgumentPusher : public SignatureIterator { 876 protected: 877 JavaCallArguments* _arguments; 878 879 virtual void get_bool () = 0; 880 virtual void get_char () = 0; 881 virtual void get_short () = 0; 882 virtual void get_byte () = 0; 883 virtual void get_int () = 0; 884 virtual void get_long () = 0; 885 virtual void get_float () = 0; 886 virtual void get_double () = 0; 887 virtual void get_object () = 0; 888 889 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { 890 this->_return_type = T_ILLEGAL; 891 _arguments = NULL; 892 } 893 894 public: 895 virtual void iterate( uint64_t fingerprint ) = 0; 896 897 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } 898 899 inline void do_bool() { if (!is_return_type()) get_bool(); } 900 inline void do_char() { if (!is_return_type()) get_char(); } 901 inline void do_short() { if (!is_return_type()) get_short(); } 902 inline void do_byte() { if (!is_return_type()) get_byte(); } 903 inline void do_int() { if (!is_return_type()) get_int(); } 904 inline void do_long() { if (!is_return_type()) get_long(); } 905 inline void do_float() { if (!is_return_type()) get_float(); } 906 inline void do_double() { if (!is_return_type()) get_double(); } 907 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } 908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array 909 inline void do_void() { } 910 911 JavaCallArguments* arguments() { return _arguments; } 912 void push_receiver(Handle h) { _arguments->push_oop(h); } 913}; 914 915 916class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { 917 protected: 918 va_list _ap; 919 920 inline void get_bool() { 921 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 922 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 923 // TemplateInterpreterGenerator::generate_result_handler_for and 924 // SharedRuntime::generate_native_wrapper. 925 jboolean b = va_arg(_ap, jint); 926 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 927 } 928 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg 929 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg 930 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg 931 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } 932 933 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests 934 935 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } 936 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg 937 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } 938 inline void get_object() { jobject l = va_arg(_ap, jobject); 939 _arguments->push_oop(Handle((oop *)l, false)); } 940 941 inline void set_ap(va_list rap) { 942 va_copy(_ap, rap); 943 } 944 945 public: 946 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) 947 : JNI_ArgumentPusher(signature) { 948 set_ap(rap); 949 } 950 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) 951 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 952 set_ap(rap); 953 } 954 955 // Optimized path if we have the bitvector form of signature 956 void iterate( uint64_t fingerprint ) { 957 if (fingerprint == (uint64_t)CONST64(-1)) { 958 SignatureIterator::iterate(); // Must be too many arguments 959 } else { 960 _return_type = (BasicType)((fingerprint >> static_feature_size) & 961 result_feature_mask); 962 963 assert(fingerprint, "Fingerprint should not be 0"); 964 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 965 while ( 1 ) { 966 switch ( fingerprint & parameter_feature_mask ) { 967 case bool_parm: 968 get_bool(); 969 break; 970 case char_parm: 971 get_char(); 972 break; 973 case short_parm: 974 get_short(); 975 break; 976 case byte_parm: 977 get_byte(); 978 break; 979 case int_parm: 980 get_int(); 981 break; 982 case obj_parm: 983 get_object(); 984 break; 985 case long_parm: 986 get_long(); 987 break; 988 case float_parm: 989 get_float(); 990 break; 991 case double_parm: 992 get_double(); 993 break; 994 case done_parm: 995 return; 996 break; 997 default: 998 ShouldNotReachHere(); 999 break; 1000 } 1001 fingerprint >>= parameter_feature_size; 1002 } 1003 } 1004 } 1005}; 1006 1007 1008class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { 1009 protected: 1010 const jvalue *_ap; 1011 1012 inline void get_bool() { 1013 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and 1014 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in 1015 // TemplateInterpreterGenerator::generate_result_handler_for and 1016 // SharedRuntime::generate_native_wrapper. 1017 jboolean b = (_ap++)->z; 1018 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE)); 1019 } 1020 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } 1021 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } 1022 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } 1023 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } 1024 1025 inline void get_long() { _arguments->push_long((_ap++)->j); } 1026 inline void get_float() { _arguments->push_float((_ap++)->f); } 1027 inline void get_double() { _arguments->push_double((_ap++)->d);} 1028 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } 1029 1030 inline void set_ap(const jvalue *rap) { _ap = rap; } 1031 1032 public: 1033 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) 1034 : JNI_ArgumentPusher(signature) { 1035 set_ap(rap); 1036 } 1037 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) 1038 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) { 1039 set_ap(rap); 1040 } 1041 1042 // Optimized path if we have the bitvector form of signature 1043 void iterate( uint64_t fingerprint ) { 1044 if (fingerprint == (uint64_t)CONST64(-1)) { 1045 SignatureIterator::iterate(); // Must be too many arguments 1046 } else { 1047 _return_type = (BasicType)((fingerprint >> static_feature_size) & 1048 result_feature_mask); 1049 assert(fingerprint, "Fingerprint should not be 0"); 1050 fingerprint = fingerprint >> (static_feature_size + result_feature_size); 1051 while ( 1 ) { 1052 switch ( fingerprint & parameter_feature_mask ) { 1053 case bool_parm: 1054 get_bool(); 1055 break; 1056 case char_parm: 1057 get_char(); 1058 break; 1059 case short_parm: 1060 get_short(); 1061 break; 1062 case byte_parm: 1063 get_byte(); 1064 break; 1065 case int_parm: 1066 get_int(); 1067 break; 1068 case obj_parm: 1069 get_object(); 1070 break; 1071 case long_parm: 1072 get_long(); 1073 break; 1074 case float_parm: 1075 get_float(); 1076 break; 1077 case double_parm: 1078 get_double(); 1079 break; 1080 case done_parm: 1081 return; 1082 break; 1083 default: 1084 ShouldNotReachHere(); 1085 break; 1086 } 1087 fingerprint >>= parameter_feature_size; 1088 } 1089 } 1090 } 1091}; 1092 1093 1094enum JNICallType { 1095 JNI_STATIC, 1096 JNI_VIRTUAL, 1097 JNI_NONVIRTUAL 1098}; 1099 1100 1101 1102static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1103 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id)); 1104 1105 // Create object to hold arguments for the JavaCall, and associate it with 1106 // the jni parser 1107 ResourceMark rm(THREAD); 1108 int number_of_parameters = method->size_of_parameters(); 1109 JavaCallArguments java_args(number_of_parameters); 1110 args->set_java_argument_object(&java_args); 1111 1112 assert(method->is_static(), "method should be static"); 1113 1114 // Fill out JavaCallArguments object 1115 args->iterate( Fingerprinter(method).fingerprint() ); 1116 // Initialize result type 1117 result->set_type(args->get_ret_type()); 1118 1119 // Invoke the method. Result is returned as oop. 1120 JavaCalls::call(result, method, &java_args, CHECK); 1121 1122 // Convert result 1123 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1124 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1125 } 1126} 1127 1128 1129static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { 1130 oop recv = JNIHandles::resolve(receiver); 1131 if (recv == NULL) { 1132 THROW(vmSymbols::java_lang_NullPointerException()); 1133 } 1134 Handle h_recv(THREAD, recv); 1135 1136 int number_of_parameters; 1137 Method* selected_method; 1138 { 1139 Method* m = Method::resolve_jmethod_id(method_id); 1140 number_of_parameters = m->size_of_parameters(); 1141 Klass* holder = m->method_holder(); 1142 if (call_type != JNI_VIRTUAL) { 1143 selected_method = m; 1144 } else if (!m->has_itable_index()) { 1145 // non-interface call -- for that little speed boost, don't handlize 1146 debug_only(NoSafepointVerifier nosafepoint;) 1147 // jni_GetMethodID makes sure class is linked and initialized 1148 // so m should have a valid vtable index. 1149 assert(m->valid_vtable_index(), "no valid vtable index"); 1150 int vtbl_index = m->vtable_index(); 1151 if (vtbl_index != Method::nonvirtual_vtable_index) { 1152 selected_method = h_recv->klass()->method_at_vtable(vtbl_index); 1153 } else { 1154 // final method 1155 selected_method = m; 1156 } 1157 } else { 1158 // interface call 1159 KlassHandle h_holder(THREAD, holder); 1160 1161 int itbl_index = m->itable_index(); 1162 Klass* k = h_recv->klass(); 1163 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); 1164 } 1165 } 1166 1167 methodHandle method(THREAD, selected_method); 1168 1169 // Create object to hold arguments for the JavaCall, and associate it with 1170 // the jni parser 1171 ResourceMark rm(THREAD); 1172 JavaCallArguments java_args(number_of_parameters); 1173 args->set_java_argument_object(&java_args); 1174 1175 // handle arguments 1176 assert(!method->is_static(), "method should not be static"); 1177 args->push_receiver(h_recv); // Push jobject handle 1178 1179 // Fill out JavaCallArguments object 1180 args->iterate( Fingerprinter(method).fingerprint() ); 1181 // Initialize result type 1182 result->set_type(args->get_ret_type()); 1183 1184 // Invoke the method. Result is returned as oop. 1185 JavaCalls::call(result, method, &java_args, CHECK); 1186 1187 // Convert result 1188 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { 1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); 1190 } 1191} 1192 1193 1194static instanceOop alloc_object(jclass clazz, TRAPS) { 1195 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1196 if (k == NULL) { 1197 ResourceMark rm(THREAD); 1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL); 1199 } 1200 k()->check_valid_for_instantiation(false, CHECK_NULL); 1201 InstanceKlass::cast(k())->initialize(CHECK_NULL); 1202 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD); 1203 return ih; 1204} 1205 1206DT_RETURN_MARK_DECL(AllocObject, jobject 1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref)); 1208 1209JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) 1210 JNIWrapper("AllocObject"); 1211 1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz); 1213 1214 jobject ret = NULL; 1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); 1216 1217 instanceOop i = alloc_object(clazz, CHECK_NULL); 1218 ret = JNIHandles::make_local(env, i); 1219 return ret; 1220JNI_END 1221 1222DT_RETURN_MARK_DECL(NewObjectA, jobject 1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref)); 1224 1225JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) 1226 JNIWrapper("NewObjectA"); 1227 1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID); 1229 1230 jobject obj = NULL; 1231 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); 1232 1233 instanceOop i = alloc_object(clazz, CHECK_NULL); 1234 obj = JNIHandles::make_local(env, i); 1235 JavaValue jvalue(T_VOID); 1236 JNI_ArgumentPusherArray ap(methodID, args); 1237 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1238 return obj; 1239JNI_END 1240 1241 1242DT_RETURN_MARK_DECL(NewObjectV, jobject 1243 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref)); 1244 1245JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) 1246 JNIWrapper("NewObjectV"); 1247 1248 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID); 1249 1250 jobject obj = NULL; 1251 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); 1252 1253 instanceOop i = alloc_object(clazz, CHECK_NULL); 1254 obj = JNIHandles::make_local(env, i); 1255 JavaValue jvalue(T_VOID); 1256 JNI_ArgumentPusherVaArg ap(methodID, args); 1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1258 return obj; 1259JNI_END 1260 1261 1262DT_RETURN_MARK_DECL(NewObject, jobject 1263 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref)); 1264 1265JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) 1266 JNIWrapper("NewObject"); 1267 1268 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID); 1269 1270 jobject obj = NULL; 1271 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); 1272 1273 instanceOop i = alloc_object(clazz, CHECK_NULL); 1274 obj = JNIHandles::make_local(env, i); 1275 va_list args; 1276 va_start(args, methodID); 1277 JavaValue jvalue(T_VOID); 1278 JNI_ArgumentPusherVaArg ap(methodID, args); 1279 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); 1280 va_end(args); 1281 return obj; 1282JNI_END 1283 1284 1285JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) 1286 JNIWrapper("GetObjectClass"); 1287 1288 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj); 1289 1290 Klass* k = JNIHandles::resolve_non_null(obj)->klass(); 1291 jclass ret = 1292 (jclass) JNIHandles::make_local(env, k->java_mirror()); 1293 1294 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret); 1295 return ret; 1296JNI_END 1297 1298JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) 1299 JNIWrapper("IsInstanceOf"); 1300 1301 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz); 1302 1303 jboolean ret = JNI_TRUE; 1304 if (obj != NULL) { 1305 ret = JNI_FALSE; 1306 Klass* k = java_lang_Class::as_Klass( 1307 JNIHandles::resolve_non_null(clazz)); 1308 if (k != NULL) { 1309 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; 1310 } 1311 } 1312 1313 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret); 1314 return ret; 1315JNI_END 1316 1317 1318static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, 1319 const char *sig, bool is_static, TRAPS) { 1320 // %%%% This code should probably just call into a method in the LinkResolver 1321 // 1322 // The class should have been loaded (we have an instance of the class 1323 // passed in) so the method and signature should already be in the symbol 1324 // table. If they're not there, the method doesn't exist. 1325 const char *name_to_probe = (name_str == NULL) 1326 ? vmSymbols::object_initializer_name()->as_C_string() 1327 : name_str; 1328 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); 1329 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); 1330 1331 if (name == NULL || signature == NULL) { 1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1333 } 1334 1335 // Throw a NoSuchMethodError exception if we have an instance of a 1336 // primitive java.lang.Class 1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { 1338 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1339 } 1340 1341 KlassHandle klass(THREAD, 1342 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1343 1344 // Make sure class is linked and initialized before handing id's out to 1345 // Method*s. 1346 klass()->initialize(CHECK_NULL); 1347 1348 Method* m; 1349 if (name == vmSymbols::object_initializer_name() || 1350 name == vmSymbols::class_initializer_name()) { 1351 // Never search superclasses for constructors 1352 if (klass->is_instance_klass()) { 1353 m = InstanceKlass::cast(klass())->find_method(name, signature); 1354 } else { 1355 m = NULL; 1356 } 1357 } else { 1358 m = klass->lookup_method(name, signature); 1359 if (m == NULL && klass->is_instance_klass()) { 1360 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature); 1361 } 1362 } 1363 if (m == NULL || (m->is_static() != is_static)) { 1364 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); 1365 } 1366 return m->jmethod_id(); 1367} 1368 1369 1370JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, 1371 const char *name, const char *sig)) 1372 JNIWrapper("GetMethodID"); 1373 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig); 1374 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); 1375 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret); 1376 return ret; 1377JNI_END 1378 1379 1380JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, 1381 const char *name, const char *sig)) 1382 JNIWrapper("GetStaticMethodID"); 1383 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig); 1384 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); 1385 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret); 1386 return ret; 1387JNI_END 1388 1389 1390 1391// 1392// Calling Methods 1393// 1394 1395 1396#define DEFINE_CALLMETHOD(ResultType, Result, Tag \ 1397 , EntryProbe, ReturnProbe) \ 1398\ 1399 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \ 1400 , ReturnProbe); \ 1401\ 1402JNI_ENTRY(ResultType, \ 1403 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ 1404 JNIWrapper("Call" XSTR(Result) "Method"); \ 1405\ 1406 EntryProbe; \ 1407 ResultType ret = 0;\ 1408 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ 1409 (const ResultType&)ret);\ 1410\ 1411 va_list args; \ 1412 va_start(args, methodID); \ 1413 JavaValue jvalue(Tag); \ 1414 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1416 va_end(args); \ 1417 ret = jvalue.get_##ResultType(); \ 1418 return ret;\ 1419JNI_END 1420 1421// the runtime type of subword integral basic types is integer 1422DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN 1423 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1424 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref)) 1425DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE 1426 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1427 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref)) 1428DEFINE_CALLMETHOD(jchar, Char, T_CHAR 1429 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1430 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref)) 1431DEFINE_CALLMETHOD(jshort, Short, T_SHORT 1432 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1433 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref)) 1434 1435DEFINE_CALLMETHOD(jobject, Object, T_OBJECT 1436 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1437 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref)) 1438DEFINE_CALLMETHOD(jint, Int, T_INT, 1439 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1440 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref)) 1441DEFINE_CALLMETHOD(jlong, Long, T_LONG 1442 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1443 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref)) 1444// Float and double probes don't return value because dtrace doesn't currently support it 1445DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT 1446 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1447 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN()) 1448DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE 1449 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID), 1450 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN()) 1451 1452#define DEFINE_CALLMETHODV(ResultType, Result, Tag \ 1453 , EntryProbe, ReturnProbe) \ 1454\ 1455 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \ 1456 , ReturnProbe); \ 1457\ 1458JNI_ENTRY(ResultType, \ 1459 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ 1460 JNIWrapper("Call" XSTR(Result) "MethodV"); \ 1461\ 1462 EntryProbe;\ 1463 ResultType ret = 0;\ 1464 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ 1465 (const ResultType&)ret);\ 1466\ 1467 JavaValue jvalue(Tag); \ 1468 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1470 ret = jvalue.get_##ResultType(); \ 1471 return ret;\ 1472JNI_END 1473 1474// the runtime type of subword integral basic types is integer 1475DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN 1476 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1477 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref)) 1478DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE 1479 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1480 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref)) 1481DEFINE_CALLMETHODV(jchar, Char, T_CHAR 1482 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1483 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref)) 1484DEFINE_CALLMETHODV(jshort, Short, T_SHORT 1485 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1486 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref)) 1487 1488DEFINE_CALLMETHODV(jobject, Object, T_OBJECT 1489 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1490 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref)) 1491DEFINE_CALLMETHODV(jint, Int, T_INT, 1492 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1493 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref)) 1494DEFINE_CALLMETHODV(jlong, Long, T_LONG 1495 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1496 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref)) 1497// Float and double probes don't return value because dtrace doesn't currently support it 1498DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT 1499 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1500 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN()) 1501DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE 1502 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID), 1503 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN()) 1504 1505#define DEFINE_CALLMETHODA(ResultType, Result, Tag \ 1506 , EntryProbe, ReturnProbe) \ 1507\ 1508 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \ 1509 , ReturnProbe); \ 1510\ 1511JNI_ENTRY(ResultType, \ 1512 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ 1513 JNIWrapper("Call" XSTR(Result) "MethodA"); \ 1514 EntryProbe; \ 1515 ResultType ret = 0;\ 1516 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ 1517 (const ResultType&)ret);\ 1518\ 1519 JavaValue jvalue(Tag); \ 1520 JNI_ArgumentPusherArray ap(methodID, args); \ 1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ 1522 ret = jvalue.get_##ResultType(); \ 1523 return ret;\ 1524JNI_END 1525 1526// the runtime type of subword integral basic types is integer 1527DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN 1528 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1529 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref)) 1530DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE 1531 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1532 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref)) 1533DEFINE_CALLMETHODA(jchar, Char, T_CHAR 1534 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1535 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref)) 1536DEFINE_CALLMETHODA(jshort, Short, T_SHORT 1537 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1538 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref)) 1539 1540DEFINE_CALLMETHODA(jobject, Object, T_OBJECT 1541 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1542 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref)) 1543DEFINE_CALLMETHODA(jint, Int, T_INT, 1544 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1545 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref)) 1546DEFINE_CALLMETHODA(jlong, Long, T_LONG 1547 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1548 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref)) 1549// Float and double probes don't return value because dtrace doesn't currently support it 1550DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT 1551 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1552 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN()) 1553DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE 1554 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID), 1555 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN()) 1556 1557DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN()); 1558DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN()); 1559DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN()); 1560 1561 1562JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) 1563 JNIWrapper("CallVoidMethod"); 1564 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID); 1565 DT_VOID_RETURN_MARK(CallVoidMethod); 1566 1567 va_list args; 1568 va_start(args, methodID); 1569 JavaValue jvalue(T_VOID); 1570 JNI_ArgumentPusherVaArg ap(methodID, args); 1571 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1572 va_end(args); 1573JNI_END 1574 1575 1576JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) 1577 JNIWrapper("CallVoidMethodV"); 1578 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID); 1579 DT_VOID_RETURN_MARK(CallVoidMethodV); 1580 1581 JavaValue jvalue(T_VOID); 1582 JNI_ArgumentPusherVaArg ap(methodID, args); 1583 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1584JNI_END 1585 1586 1587JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) 1588 JNIWrapper("CallVoidMethodA"); 1589 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID); 1590 DT_VOID_RETURN_MARK(CallVoidMethodA); 1591 1592 JavaValue jvalue(T_VOID); 1593 JNI_ArgumentPusherArray ap(methodID, args); 1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); 1595JNI_END 1596 1597 1598 1599#define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \ 1600 , EntryProbe, ReturnProbe) \ 1601\ 1602 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \ 1603 , ReturnProbe);\ 1604\ 1605JNI_ENTRY(ResultType, \ 1606 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ 1607 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ 1608\ 1609 EntryProbe;\ 1610 ResultType ret;\ 1611 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ 1612 (const ResultType&)ret);\ 1613\ 1614 va_list args; \ 1615 va_start(args, methodID); \ 1616 JavaValue jvalue(Tag); \ 1617 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1619 va_end(args); \ 1620 ret = jvalue.get_##ResultType(); \ 1621 return ret;\ 1622JNI_END 1623 1624// the runtime type of subword integral basic types is integer 1625DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN 1626 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1627 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref)) 1628DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE 1629 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1630 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref)) 1631DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR 1632 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1633 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref)) 1634DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT 1635 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1636 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref)) 1637 1638DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT 1639 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1640 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref)) 1641DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT 1642 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1643 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref)) 1644DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG 1645 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1646// Float and double probes don't return value because dtrace doesn't currently support it 1647 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref)) 1648DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT 1649 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1650 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN()) 1651DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE 1652 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID), 1653 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN()) 1654 1655#define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \ 1656 , EntryProbe, ReturnProbe) \ 1657\ 1658 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \ 1659 , ReturnProbe);\ 1660\ 1661JNI_ENTRY(ResultType, \ 1662 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ 1663 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \ 1664\ 1665 EntryProbe;\ 1666 ResultType ret;\ 1667 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ 1668 (const ResultType&)ret);\ 1669\ 1670 JavaValue jvalue(Tag); \ 1671 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1672 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1673 ret = jvalue.get_##ResultType(); \ 1674 return ret;\ 1675JNI_END 1676 1677// the runtime type of subword integral basic types is integer 1678DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN 1679 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1680 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref)) 1681DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE 1682 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1683 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref)) 1684DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR 1685 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1686 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref)) 1687DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT 1688 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1689 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref)) 1690 1691DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT 1692 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1693 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref)) 1694DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT 1695 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1696 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref)) 1697DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG 1698 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1699// Float and double probes don't return value because dtrace doesn't currently support it 1700 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref)) 1701DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT 1702 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1703 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN()) 1704DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE 1705 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID), 1706 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN()) 1707 1708#define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \ 1709 , EntryProbe, ReturnProbe) \ 1710\ 1711 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \ 1712 , ReturnProbe);\ 1713\ 1714JNI_ENTRY(ResultType, \ 1715 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ 1716 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ 1717\ 1718 EntryProbe;\ 1719 ResultType ret;\ 1720 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ 1721 (const ResultType&)ret);\ 1722\ 1723 JavaValue jvalue(Tag); \ 1724 JNI_ArgumentPusherArray ap(methodID, args); \ 1725 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ 1726 ret = jvalue.get_##ResultType(); \ 1727 return ret;\ 1728JNI_END 1729 1730// the runtime type of subword integral basic types is integer 1731DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN 1732 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1733 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref)) 1734DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE 1735 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1736 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref)) 1737DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR 1738 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1739 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref)) 1740DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT 1741 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1742 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref)) 1743 1744DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT 1745 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1746 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref)) 1747DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT 1748 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1749 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref)) 1750DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG 1751 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1752// Float and double probes don't return value because dtrace doesn't currently support it 1753 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref)) 1754DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT 1755 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1756 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN()) 1757DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE 1758 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID), 1759 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN()) 1760 1761DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod 1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN()); 1763DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV 1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN()); 1765DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA 1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN()); 1767 1768JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) 1769 JNIWrapper("CallNonvirtualVoidMethod"); 1770 1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID); 1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); 1773 1774 va_list args; 1775 va_start(args, methodID); 1776 JavaValue jvalue(T_VOID); 1777 JNI_ArgumentPusherVaArg ap(methodID, args); 1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1779 va_end(args); 1780JNI_END 1781 1782 1783JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) 1784 JNIWrapper("CallNonvirtualVoidMethodV"); 1785 1786 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY( 1787 env, obj, cls, (uintptr_t) methodID); 1788 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); 1789 1790 JavaValue jvalue(T_VOID); 1791 JNI_ArgumentPusherVaArg ap(methodID, args); 1792 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1793JNI_END 1794 1795 1796JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) 1797 JNIWrapper("CallNonvirtualVoidMethodA"); 1798 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY( 1799 env, obj, cls, (uintptr_t) methodID); 1800 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); 1801 JavaValue jvalue(T_VOID); 1802 JNI_ArgumentPusherArray ap(methodID, args); 1803 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); 1804JNI_END 1805 1806 1807 1808#define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \ 1809 , EntryProbe, ResultProbe) \ 1810\ 1811 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \ 1812 , ResultProbe); \ 1813\ 1814JNI_ENTRY(ResultType, \ 1815 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ 1816 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ 1817\ 1818 EntryProbe; \ 1819 ResultType ret = 0;\ 1820 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ 1821 (const ResultType&)ret);\ 1822\ 1823 va_list args; \ 1824 va_start(args, methodID); \ 1825 JavaValue jvalue(Tag); \ 1826 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1827 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1828 va_end(args); \ 1829 ret = jvalue.get_##ResultType(); \ 1830 return ret;\ 1831JNI_END 1832 1833// the runtime type of subword integral basic types is integer 1834DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN 1835 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1836 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref)); 1837DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE 1838 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1839 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref)); 1840DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR 1841 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1842 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref)); 1843DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT 1844 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1845 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref)); 1846 1847DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT 1848 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1849 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref)); 1850DEFINE_CALLSTATICMETHOD(jint, Int, T_INT 1851 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1852 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref)); 1853DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG 1854 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1855 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref)); 1856// Float and double probes don't return value because dtrace doesn't currently support it 1857DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT 1858 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1859 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN()); 1860DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE 1861 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID), 1862 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN()); 1863 1864#define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \ 1865 , EntryProbe, ResultProbe) \ 1866\ 1867 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \ 1868 , ResultProbe); \ 1869\ 1870JNI_ENTRY(ResultType, \ 1871 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ 1872 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ 1873\ 1874 EntryProbe; \ 1875 ResultType ret = 0;\ 1876 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ 1877 (const ResultType&)ret);\ 1878\ 1879 JavaValue jvalue(Tag); \ 1880 JNI_ArgumentPusherVaArg ap(methodID, args); \ 1881 /* Make sure class is initialized before trying to invoke its method */ \ 1882 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \ 1883 k()->initialize(CHECK_0); \ 1884 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1885 va_end(args); \ 1886 ret = jvalue.get_##ResultType(); \ 1887 return ret;\ 1888JNI_END 1889 1890// the runtime type of subword integral basic types is integer 1891DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN 1892 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1893 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref)); 1894DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE 1895 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1896 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref)); 1897DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR 1898 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1899 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref)); 1900DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT 1901 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1902 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref)); 1903 1904DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT 1905 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1906 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref)); 1907DEFINE_CALLSTATICMETHODV(jint, Int, T_INT 1908 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1909 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref)); 1910DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG 1911 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1912 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref)); 1913// Float and double probes don't return value because dtrace doesn't currently support it 1914DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT 1915 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1916 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN()); 1917DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE 1918 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID), 1919 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN()); 1920 1921#define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \ 1922 , EntryProbe, ResultProbe) \ 1923\ 1924 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \ 1925 , ResultProbe); \ 1926\ 1927JNI_ENTRY(ResultType, \ 1928 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ 1929 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ 1930\ 1931 EntryProbe; \ 1932 ResultType ret = 0;\ 1933 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ 1934 (const ResultType&)ret);\ 1935\ 1936 JavaValue jvalue(Tag); \ 1937 JNI_ArgumentPusherArray ap(methodID, args); \ 1938 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ 1939 ret = jvalue.get_##ResultType(); \ 1940 return ret;\ 1941JNI_END 1942 1943// the runtime type of subword integral basic types is integer 1944DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN 1945 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1946 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref)); 1947DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE 1948 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1949 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref)); 1950DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR 1951 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1952 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref)); 1953DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT 1954 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1955 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref)); 1956 1957DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT 1958 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1959 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref)); 1960DEFINE_CALLSTATICMETHODA(jint, Int, T_INT 1961 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1962 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref)); 1963DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG 1964 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1965 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref)); 1966// Float and double probes don't return value because dtrace doesn't currently support it 1967DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT 1968 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1969 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN()); 1970DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE 1971 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID), 1972 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN()); 1973 1974DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod 1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN()); 1976DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV 1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN()); 1978DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA 1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN()); 1980 1981JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) 1982 JNIWrapper("CallStaticVoidMethod"); 1983 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID); 1984 DT_VOID_RETURN_MARK(CallStaticVoidMethod); 1985 1986 va_list args; 1987 va_start(args, methodID); 1988 JavaValue jvalue(T_VOID); 1989 JNI_ArgumentPusherVaArg ap(methodID, args); 1990 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 1991 va_end(args); 1992JNI_END 1993 1994 1995JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) 1996 JNIWrapper("CallStaticVoidMethodV"); 1997 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID); 1998 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); 1999 2000 JavaValue jvalue(T_VOID); 2001 JNI_ArgumentPusherVaArg ap(methodID, args); 2002 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2003JNI_END 2004 2005 2006JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) 2007 JNIWrapper("CallStaticVoidMethodA"); 2008 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID); 2009 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); 2010 2011 JavaValue jvalue(T_VOID); 2012 JNI_ArgumentPusherArray ap(methodID, args); 2013 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); 2014JNI_END 2015 2016 2017// 2018// Accessing Fields 2019// 2020 2021 2022DT_RETURN_MARK_DECL(GetFieldID, jfieldID 2023 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref)); 2024 2025JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, 2026 const char *name, const char *sig)) 2027 JNIWrapper("GetFieldID"); 2028 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2029 jfieldID ret = 0; 2030 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); 2031 2032 // The class should have been loaded (we have an instance of the class 2033 // passed in) so the field and signature should already be in the symbol 2034 // table. If they're not there, the field doesn't exist. 2035 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2036 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2037 if (fieldname == NULL || signame == NULL) { 2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2039 } 2040 KlassHandle k(THREAD, 2041 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2042 // Make sure class is initialized before handing id's out to fields 2043 k()->initialize(CHECK_NULL); 2044 2045 fieldDescriptor fd; 2046 if (!k()->is_instance_klass() || 2047 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { 2048 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2049 } 2050 2051 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop 2052 // It may also have hash bits for k, if VerifyJNIFields is turned on. 2053 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); 2054 return ret; 2055JNI_END 2056 2057 2058JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) 2059 JNIWrapper("GetObjectField"); 2060 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID); 2061 oop o = JNIHandles::resolve_non_null(obj); 2062 Klass* k = o->klass(); 2063 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2064 // Keep JVMTI addition small and only check enabled flag here. 2065 // jni_GetField_probe() assumes that is okay to create handles. 2066 if (JvmtiExport::should_post_field_access()) { 2067 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); 2068 } 2069 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); 2070#if INCLUDE_ALL_GCS 2071 // If G1 is enabled and we are accessing the value of the referent 2072 // field in a reference object then we need to register a non-null 2073 // referent with the SATB barrier. 2074 if (UseG1GC) { 2075 bool needs_barrier = false; 2076 2077 if (ret != NULL && 2078 offset == java_lang_ref_Reference::referent_offset && 2079 InstanceKlass::cast(k)->reference_type() != REF_NONE) { 2080 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 2081 needs_barrier = true; 2082 } 2083 2084 if (needs_barrier) { 2085 oop referent = JNIHandles::resolve(ret); 2086 G1SATBCardTableModRefBS::enqueue(referent); 2087 } 2088 } 2089#endif // INCLUDE_ALL_GCS 2090HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret); 2091 return ret; 2092JNI_END 2093 2094 2095 2096#define DEFINE_GETFIELD(Return,Fieldname,Result \ 2097 , EntryProbe, ReturnProbe) \ 2098\ 2099 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \ 2100 , ReturnProbe); \ 2101\ 2102JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ 2103 JNIWrapper("Get" XSTR(Result) "Field"); \ 2104\ 2105 EntryProbe; \ 2106 Return ret = 0;\ 2107 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ 2108\ 2109 oop o = JNIHandles::resolve_non_null(obj); \ 2110 Klass* k = o->klass(); \ 2111 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2112 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2113 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ 2114 /* and creates a ResetNoHandleMark. */ \ 2115 if (JvmtiExport::should_post_field_access()) { \ 2116 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ 2117 } \ 2118 ret = o->Fieldname##_field(offset); \ 2119 return ret; \ 2120JNI_END 2121 2122DEFINE_GETFIELD(jboolean, bool, Boolean 2123 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2124 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref)) 2125DEFINE_GETFIELD(jbyte, byte, Byte 2126 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2127 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref)) 2128DEFINE_GETFIELD(jchar, char, Char 2129 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2130 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref)) 2131DEFINE_GETFIELD(jshort, short, Short 2132 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2133 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref)) 2134DEFINE_GETFIELD(jint, int, Int 2135 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2136 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref)) 2137DEFINE_GETFIELD(jlong, long, Long 2138 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2139 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref)) 2140// Float and double probes don't return value because dtrace doesn't currently support it 2141DEFINE_GETFIELD(jfloat, float, Float 2142 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2143 HOTSPOT_JNI_GETFLOATFIELD_RETURN()) 2144DEFINE_GETFIELD(jdouble, double, Double 2145 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2146 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN()) 2147 2148address jni_GetBooleanField_addr() { 2149 return (address)jni_GetBooleanField; 2150} 2151address jni_GetByteField_addr() { 2152 return (address)jni_GetByteField; 2153} 2154address jni_GetCharField_addr() { 2155 return (address)jni_GetCharField; 2156} 2157address jni_GetShortField_addr() { 2158 return (address)jni_GetShortField; 2159} 2160address jni_GetIntField_addr() { 2161 return (address)jni_GetIntField; 2162} 2163address jni_GetLongField_addr() { 2164 return (address)jni_GetLongField; 2165} 2166address jni_GetFloatField_addr() { 2167 return (address)jni_GetFloatField; 2168} 2169address jni_GetDoubleField_addr() { 2170 return (address)jni_GetDoubleField; 2171} 2172 2173JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) 2174 JNIWrapper("SetObjectField"); 2175 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value); 2176 oop o = JNIHandles::resolve_non_null(obj); 2177 Klass* k = o->klass(); 2178 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2179 // Keep JVMTI addition small and only check enabled flag here. 2180 // jni_SetField_probe_nh() assumes that is not okay to create handles 2181 // and creates a ResetNoHandleMark. 2182 if (JvmtiExport::should_post_field_modification()) { 2183 jvalue field_value; 2184 field_value.l = value; 2185 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); 2186 } 2187 o->obj_field_put(offset, JNIHandles::resolve(value)); 2188 HOTSPOT_JNI_SETOBJECTFIELD_RETURN(); 2189JNI_END 2190 2191 2192#define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \ 2193 , EntryProbe, ReturnProbe) \ 2194\ 2195JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ 2196 JNIWrapper("Set" XSTR(Result) "Field"); \ 2197\ 2198 EntryProbe; \ 2199\ 2200 oop o = JNIHandles::resolve_non_null(obj); \ 2201 Klass* k = o->klass(); \ 2202 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ 2203 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2204 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ 2205 /* and creates a ResetNoHandleMark. */ \ 2206 if (JvmtiExport::should_post_field_modification()) { \ 2207 jvalue field_value; \ 2208 field_value.unionType = value; \ 2209 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ 2210 } \ 2211 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2212 o->Fieldname##_field_put(offset, value); \ 2213 ReturnProbe; \ 2214JNI_END 2215 2216DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z 2217 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2218 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN()) 2219DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b 2220 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2221 HOTSPOT_JNI_SETBYTEFIELD_RETURN()) 2222DEFINE_SETFIELD(jchar, char, Char, 'C', c 2223 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2224 HOTSPOT_JNI_SETCHARFIELD_RETURN()) 2225DEFINE_SETFIELD(jshort, short, Short, 'S', s 2226 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2227 HOTSPOT_JNI_SETSHORTFIELD_RETURN()) 2228DEFINE_SETFIELD(jint, int, Int, 'I', i 2229 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2230 HOTSPOT_JNI_SETINTFIELD_RETURN()) 2231DEFINE_SETFIELD(jlong, long, Long, 'J', j 2232 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value), 2233 HOTSPOT_JNI_SETLONGFIELD_RETURN()) 2234// Float and double probes don't return value because dtrace doesn't currently support it 2235DEFINE_SETFIELD(jfloat, float, Float, 'F', f 2236 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2237 HOTSPOT_JNI_SETFLOATFIELD_RETURN()) 2238DEFINE_SETFIELD(jdouble, double, Double, 'D', d 2239 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID), 2240 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN()) 2241 2242DT_RETURN_MARK_DECL(ToReflectedField, jobject 2243 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref)); 2244 2245JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) 2246 JNIWrapper("ToReflectedField"); 2247 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic); 2248 jobject ret = NULL; 2249 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); 2250 2251 fieldDescriptor fd; 2252 bool found = false; 2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2254 2255 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); 2256 2257 if (isStatic) { 2258 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*. 2259 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2260 assert(id->is_static_field_id(), "invalid static field id"); 2261 found = id->find_local_field(&fd); 2262 } else { 2263 // Non-static field. The fieldID is really the offset of the field within the instanceOop. 2264 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); 2265 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); 2266 } 2267 assert(found, "bad fieldID passed into jni_ToReflectedField"); 2268 oop reflected = Reflection::new_field(&fd, CHECK_NULL); 2269 ret = JNIHandles::make_local(env, reflected); 2270 return ret; 2271JNI_END 2272 2273 2274// 2275// Accessing Static Fields 2276// 2277DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID 2278 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref)); 2279 2280JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, 2281 const char *name, const char *sig)) 2282 JNIWrapper("GetStaticFieldID"); 2283 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig); 2284 jfieldID ret = NULL; 2285 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); 2286 2287 // The class should have been loaded (we have an instance of the class 2288 // passed in) so the field and signature should already be in the symbol 2289 // table. If they're not there, the field doesn't exist. 2290 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); 2291 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); 2292 if (fieldname == NULL || signame == NULL) { 2293 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2294 } 2295 KlassHandle k(THREAD, 2296 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 2297 // Make sure class is initialized before handing id's out to static fields 2298 k()->initialize(CHECK_NULL); 2299 2300 fieldDescriptor fd; 2301 if (!k()->is_instance_klass() || 2302 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { 2303 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); 2304 } 2305 2306 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass* 2307 JNIid* id = fd.field_holder()->jni_id_for(fd.offset()); 2308 debug_only(id->set_is_static_field_id();) 2309 2310 debug_only(id->verify(fd.field_holder())); 2311 2312 ret = jfieldIDWorkaround::to_static_jfieldID(id); 2313 return ret; 2314JNI_END 2315 2316 2317JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) 2318 JNIWrapper("GetStaticObjectField"); 2319 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID); 2320#if INCLUDE_JNI_CHECK 2321 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);) 2322#endif // INCLUDE_JNI_CHECK 2323 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2324 assert(id->is_static_field_id(), "invalid static field id"); 2325 // Keep JVMTI addition small and only check enabled flag here. 2326 // jni_GetField_probe() assumes that is okay to create handles. 2327 if (JvmtiExport::should_post_field_access()) { 2328 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); 2329 } 2330 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); 2331 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret); 2332 return ret; 2333JNI_END 2334 2335 2336#define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \ 2337 , EntryProbe, ReturnProbe) \ 2338\ 2339 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \ 2340 , ReturnProbe); \ 2341\ 2342JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ 2343 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ 2344 EntryProbe; \ 2345 Return ret = 0;\ 2346 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ 2347 (const Return&)ret);\ 2348 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2349 assert(id->is_static_field_id(), "invalid static field id"); \ 2350 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2351 /* jni_GetField_probe() assumes that is okay to create handles. */ \ 2352 if (JvmtiExport::should_post_field_access()) { \ 2353 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ 2354 } \ 2355 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ 2356 return ret;\ 2357JNI_END 2358 2359DEFINE_GETSTATICFIELD(jboolean, bool, Boolean 2360 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref)) 2361DEFINE_GETSTATICFIELD(jbyte, byte, Byte 2362 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) ) 2363DEFINE_GETSTATICFIELD(jchar, char, Char 2364 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) ) 2365DEFINE_GETSTATICFIELD(jshort, short, Short 2366 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) ) 2367DEFINE_GETSTATICFIELD(jint, int, Int 2368 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) ) 2369DEFINE_GETSTATICFIELD(jlong, long, Long 2370 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) ) 2371// Float and double probes don't return value because dtrace doesn't currently support it 2372DEFINE_GETSTATICFIELD(jfloat, float, Float 2373 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() ) 2374DEFINE_GETSTATICFIELD(jdouble, double, Double 2375 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() ) 2376 2377JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) 2378 JNIWrapper("SetStaticObjectField"); 2379 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value); 2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); 2381 assert(id->is_static_field_id(), "invalid static field id"); 2382 // Keep JVMTI addition small and only check enabled flag here. 2383 // jni_SetField_probe() assumes that is okay to create handles. 2384 if (JvmtiExport::should_post_field_modification()) { 2385 jvalue field_value; 2386 field_value.l = value; 2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); 2388 } 2389 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); 2390 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN(); 2391JNI_END 2392 2393 2394 2395#define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \ 2396 , EntryProbe, ReturnProbe) \ 2397\ 2398JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ 2399 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ 2400 EntryProbe; \ 2401\ 2402 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ 2403 assert(id->is_static_field_id(), "invalid static field id"); \ 2404 /* Keep JVMTI addition small and only check enabled flag here. */ \ 2405 /* jni_SetField_probe() assumes that is okay to create handles. */ \ 2406 if (JvmtiExport::should_post_field_modification()) { \ 2407 jvalue field_value; \ 2408 field_value.unionType = value; \ 2409 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ 2410 } \ 2411 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \ 2412 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ 2413 ReturnProbe;\ 2414JNI_END 2415 2416DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z 2417 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value), 2418 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN()) 2419DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b 2420 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2421 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN()) 2422DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c 2423 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2424 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN()) 2425DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s 2426 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2427 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN()) 2428DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i 2429 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2430 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN()) 2431DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j 2432 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value), 2433 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN()) 2434// Float and double probes don't return value because dtrace doesn't currently support it 2435DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f 2436 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2437 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN()) 2438DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d 2439 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), 2440 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN()) 2441 2442// 2443// String Operations 2444// 2445 2446// Unicode Interface 2447 2448DT_RETURN_MARK_DECL(NewString, jstring 2449 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref)); 2450 2451JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) 2452 JNIWrapper("NewString"); 2453 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len); 2454 jstring ret = NULL; 2455 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); 2456 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); 2457 ret = (jstring) JNIHandles::make_local(env, string); 2458 return ret; 2459JNI_END 2460 2461 2462JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) 2463 JNIWrapper("GetStringLength"); 2464 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string); 2465 jsize ret = 0; 2466 oop s = JNIHandles::resolve_non_null(string); 2467 if (java_lang_String::value(s) != NULL) { 2468 ret = java_lang_String::length(s); 2469 } 2470 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret); 2471 return ret; 2472JNI_END 2473 2474 2475JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( 2476 JNIEnv *env, jstring string, jboolean *isCopy)) 2477 JNIWrapper("GetStringChars"); 2478 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2479 jchar* buf = NULL; 2480 oop s = JNIHandles::resolve_non_null(string); 2481 typeArrayOop s_value = java_lang_String::value(s); 2482 if (s_value != NULL) { 2483 int s_len = java_lang_String::length(s); 2484 bool is_latin1 = java_lang_String::is_latin1(s); 2485 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 2486 /* JNI Specification states return NULL on OOM */ 2487 if (buf != NULL) { 2488 if (s_len > 0) { 2489 if (!is_latin1) { 2490 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len); 2491 } else { 2492 for (int i = 0; i < s_len; i++) { 2493 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; 2494 } 2495 } 2496 } 2497 buf[s_len] = 0; 2498 //%note jni_5 2499 if (isCopy != NULL) { 2500 *isCopy = JNI_TRUE; 2501 } 2502 } 2503 } 2504 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf); 2505 return buf; 2506JNI_END 2507 2508 2509JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) 2510 JNIWrapper("ReleaseStringChars"); 2511 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars); 2512 //%note jni_6 2513 if (chars != NULL) { 2514 // Since String objects are supposed to be immutable, don't copy any 2515 // new data back. A bad user will have to go after the char array. 2516 FreeHeap((void*) chars); 2517 } 2518 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN(); 2519JNI_END 2520 2521 2522// UTF Interface 2523 2524DT_RETURN_MARK_DECL(NewStringUTF, jstring 2525 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref)); 2526 2527JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) 2528 JNIWrapper("NewStringUTF"); 2529 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes); 2530 jstring ret; 2531 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); 2532 2533 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); 2534 ret = (jstring) JNIHandles::make_local(env, result); 2535 return ret; 2536JNI_END 2537 2538 2539JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) 2540 JNIWrapper("GetStringUTFLength"); 2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string); 2542 jsize ret = 0; 2543 oop java_string = JNIHandles::resolve_non_null(string); 2544 if (java_lang_String::value(java_string) != NULL) { 2545 ret = java_lang_String::utf8_length(java_string); 2546 } 2547 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret); 2548 return ret; 2549JNI_END 2550 2551 2552JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) 2553 JNIWrapper("GetStringUTFChars"); 2554 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy); 2555 char* result = NULL; 2556 oop java_string = JNIHandles::resolve_non_null(string); 2557 if (java_lang_String::value(java_string) != NULL) { 2558 size_t length = java_lang_String::utf8_length(java_string); 2559 /* JNI Specification states return NULL on OOM */ 2560 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL); 2561 if (result != NULL) { 2562 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); 2563 if (isCopy != NULL) { 2564 *isCopy = JNI_TRUE; 2565 } 2566 } 2567 } 2568 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result); 2569 return result; 2570JNI_END 2571 2572 2573JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) 2574 JNIWrapper("ReleaseStringUTFChars"); 2575 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars); 2576 if (chars != NULL) { 2577 FreeHeap((char*) chars); 2578 } 2579HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN(); 2580JNI_END 2581 2582 2583JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) 2584 JNIWrapper("GetArrayLength"); 2585 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array); 2586 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); 2587 assert(a->is_array(), "must be array"); 2588 jsize ret = a->length(); 2589 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret); 2590 return ret; 2591JNI_END 2592 2593 2594// 2595// Object Array Operations 2596// 2597 2598DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray 2599 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref)); 2600 2601JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) 2602 JNIWrapper("NewObjectArray"); 2603 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement); 2604 jobjectArray ret = NULL; 2605 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); 2606 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass))); 2607 Klass* ako = ek()->array_klass(CHECK_NULL); 2608 KlassHandle ak = KlassHandle(THREAD, ako); 2609 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL); 2610 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL); 2611 oop initial_value = JNIHandles::resolve(initialElement); 2612 if (initial_value != NULL) { // array already initialized with NULL 2613 for (int index = 0; index < length; index++) { 2614 result->obj_at_put(index, initial_value); 2615 } 2616 } 2617 ret = (jobjectArray) JNIHandles::make_local(env, result); 2618 return ret; 2619JNI_END 2620 2621DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject 2622 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref)); 2623 2624JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) 2625 JNIWrapper("GetObjectArrayElement"); 2626 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index); 2627 jobject ret = NULL; 2628 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); 2629 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2630 if (a->is_within_bounds(index)) { 2631 ret = JNIHandles::make_local(env, a->obj_at(index)); 2632 return ret; 2633 } else { 2634 char buf[jintAsStringSize]; 2635 sprintf(buf, "%d", index); 2636 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2637 } 2638JNI_END 2639 2640DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement 2641 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN()); 2642 2643JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) 2644 JNIWrapper("SetObjectArrayElement"); 2645 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value); 2646 DT_VOID_RETURN_MARK(SetObjectArrayElement); 2647 2648 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); 2649 oop v = JNIHandles::resolve(value); 2650 if (a->is_within_bounds(index)) { 2651 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) { 2652 a->obj_at_put(index, v); 2653 } else { 2654 THROW(vmSymbols::java_lang_ArrayStoreException()); 2655 } 2656 } else { 2657 char buf[jintAsStringSize]; 2658 sprintf(buf, "%d", index); 2659 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); 2660 } 2661JNI_END 2662 2663 2664 2665#define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \ 2666 ,EntryProbe,ReturnProbe) \ 2667\ 2668 DT_RETURN_MARK_DECL(New##Result##Array, Return \ 2669 , ReturnProbe); \ 2670\ 2671JNI_ENTRY(Return, \ 2672 jni_New##Result##Array(JNIEnv *env, jsize len)) \ 2673 JNIWrapper("New" XSTR(Result) "Array"); \ 2674 EntryProbe; \ 2675 Return ret = NULL;\ 2676 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ 2677\ 2678 oop obj= oopFactory::Allocator(len, CHECK_0); \ 2679 ret = (Return) JNIHandles::make_local(env, obj); \ 2680 return ret;\ 2681JNI_END 2682 2683DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean, 2684 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len), 2685 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref)) 2686DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte, 2687 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len), 2688 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref)) 2689DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short, 2690 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len), 2691 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref)) 2692DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char, 2693 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len), 2694 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref)) 2695DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int, 2696 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len), 2697 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref)) 2698DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long, 2699 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len), 2700 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref)) 2701DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float, 2702 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len), 2703 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref)) 2704DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double, 2705 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len), 2706 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref)) 2707 2708// Return an address which will fault if the caller writes to it. 2709 2710static char* get_bad_address() { 2711 static char* bad_address = NULL; 2712 if (bad_address == NULL) { 2713 size_t size = os::vm_allocation_granularity(); 2714 bad_address = os::reserve_memory(size); 2715 if (bad_address != NULL) { 2716 os::protect_memory(bad_address, size, os::MEM_PROT_READ, 2717 /*is_committed*/false); 2718 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal); 2719 } 2720 } 2721 return bad_address; 2722} 2723 2724 2725 2726#define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \ 2727 , EntryProbe, ReturnProbe) \ 2728\ 2729JNI_QUICK_ENTRY(ElementType*, \ 2730 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ 2731 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ 2732 EntryProbe; \ 2733 /* allocate an chunk of memory in c land */ \ 2734 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2735 ElementType* result; \ 2736 int len = a->length(); \ 2737 if (len == 0) { \ 2738 /* Empty array: legal but useless, can't return NULL. \ 2739 * Return a pointer to something useless. \ 2740 * Avoid asserts in typeArrayOop. */ \ 2741 result = (ElementType*)get_bad_address(); \ 2742 } else { \ 2743 /* JNI Specification states return NULL on OOM */ \ 2744 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \ 2745 if (result != NULL) { \ 2746 /* copy the array to the c chunk */ \ 2747 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ 2748 if (isCopy) { \ 2749 *isCopy = JNI_TRUE; \ 2750 } \ 2751 } \ 2752 } \ 2753 ReturnProbe; \ 2754 return result; \ 2755JNI_END 2756 2757DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2758 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2759 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result)) 2760DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2761 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2762 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result)) 2763DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2764 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2765 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result)) 2766DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2767 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy), 2768 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result)) 2769DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int 2770 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2771 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result)) 2772DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2773 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2774 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result))) 2775// Float and double probes don't return value because dtrace doesn't currently support it 2776DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2777 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2778 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result)) 2779DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2780 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy), 2781 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result)) 2782 2783 2784#define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \ 2785 , EntryProbe, ReturnProbe);\ 2786\ 2787JNI_QUICK_ENTRY(void, \ 2788 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ 2789 ElementType *buf, jint mode)) \ 2790 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ 2791 EntryProbe; \ 2792 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2793 int len = a->length(); \ 2794 if (len != 0) { /* Empty array: nothing to free or copy. */ \ 2795 if ((mode == 0) || (mode == JNI_COMMIT)) { \ 2796 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ 2797 } \ 2798 if ((mode == 0) || (mode == JNI_ABORT)) { \ 2799 FreeHeap(buf); \ 2800 } \ 2801 } \ 2802 ReturnProbe; \ 2803JNI_END 2804 2805DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool 2806 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2807 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN()) 2808DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte 2809 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode), 2810 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN()) 2811DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short 2812 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2813 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN()) 2814DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char 2815 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode), 2816 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN()) 2817DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int 2818 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode), 2819 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN()) 2820DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long 2821 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode), 2822 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN()) 2823DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float 2824 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode), 2825 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN()) 2826DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double 2827 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode), 2828 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN()) 2829 2830 2831#define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2832 , EntryProbe, ReturnProbe); \ 2833 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \ 2834 , ReturnProbe); \ 2835\ 2836JNI_ENTRY(void, \ 2837jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2838 jsize len, ElementType *buf)) \ 2839 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ 2840 EntryProbe; \ 2841 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ 2842 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2843 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ 2844 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2845 } else { \ 2846 if (len > 0) { \ 2847 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \ 2848 memcpy((u_char*) buf, \ 2849 (u_char*) src->Tag##_at_addr(start), \ 2850 len << sc); \ 2851 } \ 2852 } \ 2853JNI_END 2854 2855DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool 2856 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2857 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN()); 2858DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2859 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2860 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN()); 2861DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2862 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2863 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN()); 2864DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2865 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf), 2866 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN()); 2867DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int 2868 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf), 2869 HOTSPOT_JNI_GETINTARRAYREGION_RETURN()); 2870DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long 2871 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2872 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN()); 2873DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2874 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2875 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN()); 2876DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2877 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2878 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN()); 2879 2880 2881#define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \ 2882 , EntryProbe, ReturnProbe); \ 2883 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \ 2884 ,ReturnProbe); \ 2885\ 2886JNI_ENTRY(void, \ 2887jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ 2888 jsize len, const ElementType *buf)) \ 2889 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ 2890 EntryProbe; \ 2891 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ 2892 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ 2893 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ 2894 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ 2895 } else { \ 2896 if (len > 0) { \ 2897 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \ 2898 memcpy((u_char*) dst->Tag##_at_addr(start), \ 2899 (u_char*) buf, \ 2900 len << sc); \ 2901 } \ 2902 } \ 2903JNI_END 2904 2905DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool 2906 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf), 2907 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN()) 2908DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte 2909 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf), 2910 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN()) 2911DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short 2912 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2913 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN()) 2914DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char 2915 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf), 2916 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN()) 2917DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int 2918 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf), 2919 HOTSPOT_JNI_SETINTARRAYREGION_RETURN()) 2920DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long 2921 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf), 2922 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN()) 2923DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float 2924 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf), 2925 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN()) 2926DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double 2927 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf), 2928 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN()) 2929 2930 2931// 2932// Interception of natives 2933// 2934 2935// The RegisterNatives call being attempted tried to register with a method that 2936// is not native. Ask JVM TI what prefixes have been specified. Then check 2937// to see if the native method is now wrapped with the prefixes. See the 2938// SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. 2939static Method* find_prefixed_native(KlassHandle k, 2940 Symbol* name, Symbol* signature, TRAPS) { 2941#if INCLUDE_JVMTI 2942 ResourceMark rm(THREAD); 2943 Method* method; 2944 int name_len = name->utf8_length(); 2945 char* name_str = name->as_utf8(); 2946 int prefix_count; 2947 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); 2948 for (int i = 0; i < prefix_count; i++) { 2949 char* prefix = prefixes[i]; 2950 int prefix_len = (int)strlen(prefix); 2951 2952 // try adding this prefix to the method name and see if it matches another method name 2953 int trial_len = name_len + prefix_len; 2954 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); 2955 strcpy(trial_name_str, prefix); 2956 strcat(trial_name_str, name_str); 2957 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); 2958 if (trial_name == NULL) { 2959 continue; // no such symbol, so this prefix wasn't used, try the next prefix 2960 } 2961 method = k()->lookup_method(trial_name, signature); 2962 if (method == NULL) { 2963 continue; // signature doesn't match, try the next prefix 2964 } 2965 if (method->is_native()) { 2966 method->set_is_prefixed_native(); 2967 return method; // wahoo, we found a prefixed version of the method, return it 2968 } 2969 // found as non-native, so prefix is good, add it, probably just need more prefixes 2970 name_len = trial_len; 2971 name_str = trial_name_str; 2972 } 2973#endif // INCLUDE_JVMTI 2974 return NULL; // not found 2975} 2976 2977static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { 2978 Method* method = k()->lookup_method(name, signature); 2979 if (method == NULL) { 2980 ResourceMark rm; 2981 stringStream st; 2982 st.print("Method %s name or signature does not match", 2983 Method::name_and_sig_as_C_string(k(), name, signature)); 2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2985 } 2986 if (!method->is_native()) { 2987 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) 2988 method = find_prefixed_native(k, name, signature, THREAD); 2989 if (method == NULL) { 2990 ResourceMark rm; 2991 stringStream st; 2992 st.print("Method %s is not declared as native", 2993 Method::name_and_sig_as_C_string(k(), name, signature)); 2994 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); 2995 } 2996 } 2997 2998 if (entry != NULL) { 2999 method->set_native_function(entry, 3000 Method::native_bind_event_is_interesting); 3001 } else { 3002 method->clear_native_function(); 3003 } 3004 if (PrintJNIResolving) { 3005 ResourceMark rm(THREAD); 3006 tty->print_cr("[Registering JNI native method %s.%s]", 3007 method->method_holder()->external_name(), 3008 method->name()->as_C_string()); 3009 } 3010 return true; 3011} 3012 3013DT_RETURN_MARK_DECL(RegisterNatives, jint 3014 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref)); 3015 3016JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, 3017 const JNINativeMethod *methods, 3018 jint nMethods)) 3019 JNIWrapper("RegisterNatives"); 3020 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods); 3021 jint ret = 0; 3022 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); 3023 3024 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 3025 3026 for (int index = 0; index < nMethods; index++) { 3027 const char* meth_name = methods[index].name; 3028 const char* meth_sig = methods[index].signature; 3029 int meth_name_len = (int)strlen(meth_name); 3030 3031 // The class should have been loaded (we have an instance of the class 3032 // passed in) so the method and signature should already be in the symbol 3033 // table. If they're not there, the method doesn't exist. 3034 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); 3035 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); 3036 3037 if (name == NULL || signature == NULL) { 3038 ResourceMark rm; 3039 stringStream st; 3040 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig); 3041 // Must return negative value on failure 3042 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); 3043 } 3044 3045 bool res = register_native(h_k, name, signature, 3046 (address) methods[index].fnPtr, THREAD); 3047 if (!res) { 3048 ret = -1; 3049 break; 3050 } 3051 } 3052 return ret; 3053JNI_END 3054 3055 3056JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) 3057 JNIWrapper("UnregisterNatives"); 3058 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz); 3059 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)); 3060 //%note jni_2 3061 if (k->is_instance_klass()) { 3062 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) { 3063 Method* m = InstanceKlass::cast(k)->methods()->at(index); 3064 if (m->is_native()) { 3065 m->clear_native_function(); 3066 m->set_signature_handler(NULL); 3067 } 3068 } 3069 } 3070 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0); 3071 return 0; 3072JNI_END 3073 3074// 3075// Monitor functions 3076// 3077 3078DT_RETURN_MARK_DECL(MonitorEnter, jint 3079 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref)); 3080 3081JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) 3082 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj); 3083 jint ret = JNI_ERR; 3084 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); 3085 3086 // If the object is null, we can't do anything with it 3087 if (jobj == NULL) { 3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3089 } 3090 3091 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 3092 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); 3093 ret = JNI_OK; 3094 return ret; 3095JNI_END 3096 3097DT_RETURN_MARK_DECL(MonitorExit, jint 3098 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref)); 3099 3100JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) 3101 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj); 3102 jint ret = JNI_ERR; 3103 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); 3104 3105 // Don't do anything with a null object 3106 if (jobj == NULL) { 3107 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); 3108 } 3109 3110 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 3111 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); 3112 3113 ret = JNI_OK; 3114 return ret; 3115JNI_END 3116 3117// 3118// Extensions 3119// 3120 3121DT_VOID_RETURN_MARK_DECL(GetStringRegion 3122 , HOTSPOT_JNI_GETSTRINGREGION_RETURN()); 3123 3124JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) 3125 JNIWrapper("GetStringRegion"); 3126 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf); 3127 DT_VOID_RETURN_MARK(GetStringRegion); 3128 oop s = JNIHandles::resolve_non_null(string); 3129 int s_len = java_lang_String::length(s); 3130 if (start < 0 || len < 0 || start + len > s_len) { 3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3132 } else { 3133 if (len > 0) { 3134 typeArrayOop s_value = java_lang_String::value(s); 3135 bool is_latin1 = java_lang_String::is_latin1(s); 3136 if (!is_latin1) { 3137 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len); 3138 } else { 3139 for (int i = 0; i < len; i++) { 3140 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff; 3141 } 3142 } 3143 } 3144 } 3145JNI_END 3146 3147DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion 3148 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN()); 3149 3150JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) 3151 JNIWrapper("GetStringUTFRegion"); 3152 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf); 3153 DT_VOID_RETURN_MARK(GetStringUTFRegion); 3154 oop s = JNIHandles::resolve_non_null(string); 3155 int s_len = java_lang_String::length(s); 3156 if (start < 0 || len < 0 || start + len > s_len) { 3157 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); 3158 } else { 3159 //%note jni_7 3160 if (len > 0) { 3161 // Assume the buffer is large enough as the JNI spec. does not require user error checking 3162 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX); 3163 // as_utf8_string null-terminates the result string 3164 } else { 3165 // JDK null-terminates the buffer even in len is zero 3166 if (buf != NULL) { 3167 buf[0] = 0; 3168 } 3169 } 3170 } 3171JNI_END 3172 3173 3174JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) 3175 JNIWrapper("GetPrimitiveArrayCritical"); 3176 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy); 3177 GCLocker::lock_critical(thread); 3178 if (isCopy != NULL) { 3179 *isCopy = JNI_FALSE; 3180 } 3181 oop a = JNIHandles::resolve_non_null(array); 3182 assert(a->is_array(), "just checking"); 3183 BasicType type; 3184 if (a->is_objArray()) { 3185 type = T_OBJECT; 3186 } else { 3187 type = TypeArrayKlass::cast(a->klass())->element_type(); 3188 } 3189 void* ret = arrayOop(a)->base(type); 3190 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret); 3191 return ret; 3192JNI_END 3193 3194 3195JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) 3196 JNIWrapper("ReleasePrimitiveArrayCritical"); 3197 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode); 3198 // The array, carray and mode arguments are ignored 3199 GCLocker::unlock_critical(thread); 3200HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN(); 3201JNI_END 3202 3203 3204JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) 3205 JNIWrapper("GetStringCritical"); 3206 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy); 3207 GCLocker::lock_critical(thread); 3208 oop s = JNIHandles::resolve_non_null(string); 3209 typeArrayOop s_value = java_lang_String::value(s); 3210 bool is_latin1 = java_lang_String::is_latin1(s); 3211 if (isCopy != NULL) { 3212 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE; 3213 } 3214 jchar* ret; 3215 if (!is_latin1) { 3216 ret = (jchar*) s_value->base(T_CHAR); 3217 } else { 3218 // Inflate latin1 encoded string to UTF16 3219 int s_len = java_lang_String::length(s); 3220 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination 3221 /* JNI Specification states return NULL on OOM */ 3222 if (ret != NULL) { 3223 for (int i = 0; i < s_len; i++) { 3224 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff; 3225 } 3226 ret[s_len] = 0; 3227 } 3228 } 3229 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret); 3230 return ret; 3231JNI_END 3232 3233 3234JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) 3235 JNIWrapper("ReleaseStringCritical"); 3236 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars); 3237 // The str and chars arguments are ignored for UTF16 strings 3238 oop s = JNIHandles::resolve_non_null(str); 3239 bool is_latin1 = java_lang_String::is_latin1(s); 3240 if (is_latin1) { 3241 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical. 3242 // This assumes that ReleaseStringCritical bookends GetStringCritical. 3243 FREE_C_HEAP_ARRAY(jchar, chars); 3244 } 3245 GCLocker::unlock_critical(thread); 3246HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN(); 3247JNI_END 3248 3249 3250JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) 3251 JNIWrapper("jni_NewWeakGlobalRef"); 3252 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref); 3253 Handle ref_handle(thread, JNIHandles::resolve(ref)); 3254 jweak ret = JNIHandles::make_weak_global(ref_handle); 3255 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret); 3256 return ret; 3257JNI_END 3258 3259// Must be JNI_ENTRY (with HandleMark) 3260JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) 3261 JNIWrapper("jni_DeleteWeakGlobalRef"); 3262 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref); 3263 JNIHandles::destroy_weak_global(ref); 3264 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN(); 3265JNI_END 3266 3267 3268JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) 3269 JNIWrapper("jni_ExceptionCheck"); 3270 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env); 3271 jni_check_async_exceptions(thread); 3272 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; 3273 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret); 3274 return ret; 3275JNI_END 3276 3277 3278// Initialization state for three routines below relating to 3279// java.nio.DirectBuffers 3280static jint directBufferSupportInitializeStarted = 0; 3281static volatile jint directBufferSupportInitializeEnded = 0; 3282static volatile jint directBufferSupportInitializeFailed = 0; 3283static jclass bufferClass = NULL; 3284static jclass directBufferClass = NULL; 3285static jclass directByteBufferClass = NULL; 3286static jmethodID directByteBufferConstructor = NULL; 3287static jfieldID directBufferAddressField = NULL; 3288static jfieldID bufferCapacityField = NULL; 3289 3290static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { 3291 Handle loader; // null (bootstrap) loader 3292 Handle protection_domain; // null protection domain 3293 3294 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); 3295 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); 3296 3297 if (log_is_enabled(Debug, class, resolve) && result != NULL) { 3298 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3299 } 3300 return result; 3301} 3302 3303// These lookups are done with the NULL (bootstrap) ClassLoader to 3304// circumvent any security checks that would be done by jni_FindClass. 3305JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) 3306{ 3307 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } 3308 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } 3309 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } 3310 return true; 3311} 3312JNI_END 3313 3314 3315static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { 3316 if (directBufferSupportInitializeFailed) { 3317 return false; 3318 } 3319 3320 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { 3321 if (!lookupDirectBufferClasses(env)) { 3322 directBufferSupportInitializeFailed = 1; 3323 return false; 3324 } 3325 3326 // Make global references for these 3327 bufferClass = (jclass) env->NewGlobalRef(bufferClass); 3328 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); 3329 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); 3330 3331 // Get needed field and method IDs 3332 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); 3333 if (env->ExceptionCheck()) { 3334 env->ExceptionClear(); 3335 directBufferSupportInitializeFailed = 1; 3336 return false; 3337 } 3338 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); 3339 if (env->ExceptionCheck()) { 3340 env->ExceptionClear(); 3341 directBufferSupportInitializeFailed = 1; 3342 return false; 3343 } 3344 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); 3345 if (env->ExceptionCheck()) { 3346 env->ExceptionClear(); 3347 directBufferSupportInitializeFailed = 1; 3348 return false; 3349 } 3350 3351 if ((directByteBufferConstructor == NULL) || 3352 (directBufferAddressField == NULL) || 3353 (bufferCapacityField == NULL)) { 3354 directBufferSupportInitializeFailed = 1; 3355 return false; 3356 } 3357 3358 directBufferSupportInitializeEnded = 1; 3359 } else { 3360 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { 3361 os::naked_yield(); 3362 } 3363 } 3364 3365 return !directBufferSupportInitializeFailed; 3366} 3367 3368extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) 3369{ 3370 // thread_from_jni_environment() will block if VM is gone. 3371 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3372 3373 JNIWrapper("jni_NewDirectByteBuffer"); 3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity); 3375 3376 if (!directBufferSupportInitializeEnded) { 3377 if (!initializeDirectBufferSupport(env, thread)) { 3378 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL); 3379 return NULL; 3380 } 3381 } 3382 3383 // Being paranoid about accidental sign extension on address 3384 jlong addr = (jlong) ((uintptr_t) address); 3385 // NOTE that package-private DirectByteBuffer constructor currently 3386 // takes int capacity 3387 jint cap = (jint) capacity; 3388 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); 3389 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret); 3390 return ret; 3391} 3392 3393DT_RETURN_MARK_DECL(GetDirectBufferAddress, void* 3394 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref)); 3395 3396extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) 3397{ 3398 // thread_from_jni_environment() will block if VM is gone. 3399 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3400 3401 JNIWrapper("jni_GetDirectBufferAddress"); 3402 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf); 3403 void* ret = NULL; 3404 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); 3405 3406 if (!directBufferSupportInitializeEnded) { 3407 if (!initializeDirectBufferSupport(env, thread)) { 3408 return 0; 3409 } 3410 } 3411 3412 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { 3413 return 0; 3414 } 3415 3416 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); 3417 return ret; 3418} 3419 3420DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong 3421 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref)); 3422 3423extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) 3424{ 3425 // thread_from_jni_environment() will block if VM is gone. 3426 JavaThread* thread = JavaThread::thread_from_jni_environment(env); 3427 3428 JNIWrapper("jni_GetDirectBufferCapacity"); 3429 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf); 3430 jlong ret = -1; 3431 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); 3432 3433 if (!directBufferSupportInitializeEnded) { 3434 if (!initializeDirectBufferSupport(env, thread)) { 3435 ret = 0; 3436 return ret; 3437 } 3438 } 3439 3440 if (buf == NULL) { 3441 return -1; 3442 } 3443 3444 if (!env->IsInstanceOf(buf, directBufferClass)) { 3445 return -1; 3446 } 3447 3448 // NOTE that capacity is currently an int in the implementation 3449 ret = env->GetIntField(buf, bufferCapacityField); 3450 return ret; 3451} 3452 3453 3454JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) 3455 JNIWrapper("GetVersion"); 3456 HOTSPOT_JNI_GETVERSION_ENTRY(env); 3457 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion); 3458 return CurrentVersion; 3459JNI_END 3460 3461extern struct JavaVM_ main_vm; 3462 3463JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) 3464 JNIWrapper("jni_GetJavaVM"); 3465 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm); 3466 *vm = (JavaVM *)(&main_vm); 3467 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK); 3468 return JNI_OK; 3469JNI_END 3470 3471 3472JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz)) 3473 JNIWrapper("GetModule"); 3474 return Modules::get_module(clazz, THREAD); 3475JNI_END 3476 3477 3478JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2)) 3479 JNIWrapper("AddModuleReads"); 3480 if (m1 == NULL || m2 == NULL) { 3481 THROW(vmSymbols::java_lang_NullPointerException()); 3482 } 3483 JavaValue result(T_VOID); 3484 Handle m1_h(THREAD, JNIHandles::resolve(m1)); 3485 if (!java_lang_reflect_Module::is_instance(m1_h())) { 3486 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object"); 3487 } 3488 Handle m2_h(THREAD, JNIHandles::resolve(m2)); 3489 if (!java_lang_reflect_Module::is_instance(m2_h())) { 3490 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object"); 3491 } 3492 JavaCalls::call_static(&result, 3493 KlassHandle(THREAD, SystemDictionary::module_Modules_klass()), 3494 vmSymbols::addReads_name(), 3495 vmSymbols::addReads_signature(), 3496 m1_h, 3497 m2_h, 3498 THREAD); 3499JNI_END 3500 3501 3502JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2)) 3503 JNIWrapper("CanReadModule"); 3504 if (m1 == NULL || m2 == NULL) { 3505 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3506 } 3507 jboolean res = Modules::can_read_module(m1, m2, CHECK_false); 3508 return res; 3509JNI_END 3510 3511 3512// Structure containing all jni functions 3513struct JNINativeInterface_ jni_NativeInterface = { 3514 NULL, 3515 NULL, 3516 NULL, 3517 3518 NULL, 3519 3520 jni_GetVersion, 3521 3522 jni_DefineClass, 3523 jni_FindClass, 3524 3525 jni_FromReflectedMethod, 3526 jni_FromReflectedField, 3527 3528 jni_ToReflectedMethod, 3529 3530 jni_GetSuperclass, 3531 jni_IsAssignableFrom, 3532 3533 jni_ToReflectedField, 3534 3535 jni_Throw, 3536 jni_ThrowNew, 3537 jni_ExceptionOccurred, 3538 jni_ExceptionDescribe, 3539 jni_ExceptionClear, 3540 jni_FatalError, 3541 3542 jni_PushLocalFrame, 3543 jni_PopLocalFrame, 3544 3545 jni_NewGlobalRef, 3546 jni_DeleteGlobalRef, 3547 jni_DeleteLocalRef, 3548 jni_IsSameObject, 3549 3550 jni_NewLocalRef, 3551 jni_EnsureLocalCapacity, 3552 3553 jni_AllocObject, 3554 jni_NewObject, 3555 jni_NewObjectV, 3556 jni_NewObjectA, 3557 3558 jni_GetObjectClass, 3559 jni_IsInstanceOf, 3560 3561 jni_GetMethodID, 3562 3563 jni_CallObjectMethod, 3564 jni_CallObjectMethodV, 3565 jni_CallObjectMethodA, 3566 jni_CallBooleanMethod, 3567 jni_CallBooleanMethodV, 3568 jni_CallBooleanMethodA, 3569 jni_CallByteMethod, 3570 jni_CallByteMethodV, 3571 jni_CallByteMethodA, 3572 jni_CallCharMethod, 3573 jni_CallCharMethodV, 3574 jni_CallCharMethodA, 3575 jni_CallShortMethod, 3576 jni_CallShortMethodV, 3577 jni_CallShortMethodA, 3578 jni_CallIntMethod, 3579 jni_CallIntMethodV, 3580 jni_CallIntMethodA, 3581 jni_CallLongMethod, 3582 jni_CallLongMethodV, 3583 jni_CallLongMethodA, 3584 jni_CallFloatMethod, 3585 jni_CallFloatMethodV, 3586 jni_CallFloatMethodA, 3587 jni_CallDoubleMethod, 3588 jni_CallDoubleMethodV, 3589 jni_CallDoubleMethodA, 3590 jni_CallVoidMethod, 3591 jni_CallVoidMethodV, 3592 jni_CallVoidMethodA, 3593 3594 jni_CallNonvirtualObjectMethod, 3595 jni_CallNonvirtualObjectMethodV, 3596 jni_CallNonvirtualObjectMethodA, 3597 jni_CallNonvirtualBooleanMethod, 3598 jni_CallNonvirtualBooleanMethodV, 3599 jni_CallNonvirtualBooleanMethodA, 3600 jni_CallNonvirtualByteMethod, 3601 jni_CallNonvirtualByteMethodV, 3602 jni_CallNonvirtualByteMethodA, 3603 jni_CallNonvirtualCharMethod, 3604 jni_CallNonvirtualCharMethodV, 3605 jni_CallNonvirtualCharMethodA, 3606 jni_CallNonvirtualShortMethod, 3607 jni_CallNonvirtualShortMethodV, 3608 jni_CallNonvirtualShortMethodA, 3609 jni_CallNonvirtualIntMethod, 3610 jni_CallNonvirtualIntMethodV, 3611 jni_CallNonvirtualIntMethodA, 3612 jni_CallNonvirtualLongMethod, 3613 jni_CallNonvirtualLongMethodV, 3614 jni_CallNonvirtualLongMethodA, 3615 jni_CallNonvirtualFloatMethod, 3616 jni_CallNonvirtualFloatMethodV, 3617 jni_CallNonvirtualFloatMethodA, 3618 jni_CallNonvirtualDoubleMethod, 3619 jni_CallNonvirtualDoubleMethodV, 3620 jni_CallNonvirtualDoubleMethodA, 3621 jni_CallNonvirtualVoidMethod, 3622 jni_CallNonvirtualVoidMethodV, 3623 jni_CallNonvirtualVoidMethodA, 3624 3625 jni_GetFieldID, 3626 3627 jni_GetObjectField, 3628 jni_GetBooleanField, 3629 jni_GetByteField, 3630 jni_GetCharField, 3631 jni_GetShortField, 3632 jni_GetIntField, 3633 jni_GetLongField, 3634 jni_GetFloatField, 3635 jni_GetDoubleField, 3636 3637 jni_SetObjectField, 3638 jni_SetBooleanField, 3639 jni_SetByteField, 3640 jni_SetCharField, 3641 jni_SetShortField, 3642 jni_SetIntField, 3643 jni_SetLongField, 3644 jni_SetFloatField, 3645 jni_SetDoubleField, 3646 3647 jni_GetStaticMethodID, 3648 3649 jni_CallStaticObjectMethod, 3650 jni_CallStaticObjectMethodV, 3651 jni_CallStaticObjectMethodA, 3652 jni_CallStaticBooleanMethod, 3653 jni_CallStaticBooleanMethodV, 3654 jni_CallStaticBooleanMethodA, 3655 jni_CallStaticByteMethod, 3656 jni_CallStaticByteMethodV, 3657 jni_CallStaticByteMethodA, 3658 jni_CallStaticCharMethod, 3659 jni_CallStaticCharMethodV, 3660 jni_CallStaticCharMethodA, 3661 jni_CallStaticShortMethod, 3662 jni_CallStaticShortMethodV, 3663 jni_CallStaticShortMethodA, 3664 jni_CallStaticIntMethod, 3665 jni_CallStaticIntMethodV, 3666 jni_CallStaticIntMethodA, 3667 jni_CallStaticLongMethod, 3668 jni_CallStaticLongMethodV, 3669 jni_CallStaticLongMethodA, 3670 jni_CallStaticFloatMethod, 3671 jni_CallStaticFloatMethodV, 3672 jni_CallStaticFloatMethodA, 3673 jni_CallStaticDoubleMethod, 3674 jni_CallStaticDoubleMethodV, 3675 jni_CallStaticDoubleMethodA, 3676 jni_CallStaticVoidMethod, 3677 jni_CallStaticVoidMethodV, 3678 jni_CallStaticVoidMethodA, 3679 3680 jni_GetStaticFieldID, 3681 3682 jni_GetStaticObjectField, 3683 jni_GetStaticBooleanField, 3684 jni_GetStaticByteField, 3685 jni_GetStaticCharField, 3686 jni_GetStaticShortField, 3687 jni_GetStaticIntField, 3688 jni_GetStaticLongField, 3689 jni_GetStaticFloatField, 3690 jni_GetStaticDoubleField, 3691 3692 jni_SetStaticObjectField, 3693 jni_SetStaticBooleanField, 3694 jni_SetStaticByteField, 3695 jni_SetStaticCharField, 3696 jni_SetStaticShortField, 3697 jni_SetStaticIntField, 3698 jni_SetStaticLongField, 3699 jni_SetStaticFloatField, 3700 jni_SetStaticDoubleField, 3701 3702 jni_NewString, 3703 jni_GetStringLength, 3704 jni_GetStringChars, 3705 jni_ReleaseStringChars, 3706 3707 jni_NewStringUTF, 3708 jni_GetStringUTFLength, 3709 jni_GetStringUTFChars, 3710 jni_ReleaseStringUTFChars, 3711 3712 jni_GetArrayLength, 3713 3714 jni_NewObjectArray, 3715 jni_GetObjectArrayElement, 3716 jni_SetObjectArrayElement, 3717 3718 jni_NewBooleanArray, 3719 jni_NewByteArray, 3720 jni_NewCharArray, 3721 jni_NewShortArray, 3722 jni_NewIntArray, 3723 jni_NewLongArray, 3724 jni_NewFloatArray, 3725 jni_NewDoubleArray, 3726 3727 jni_GetBooleanArrayElements, 3728 jni_GetByteArrayElements, 3729 jni_GetCharArrayElements, 3730 jni_GetShortArrayElements, 3731 jni_GetIntArrayElements, 3732 jni_GetLongArrayElements, 3733 jni_GetFloatArrayElements, 3734 jni_GetDoubleArrayElements, 3735 3736 jni_ReleaseBooleanArrayElements, 3737 jni_ReleaseByteArrayElements, 3738 jni_ReleaseCharArrayElements, 3739 jni_ReleaseShortArrayElements, 3740 jni_ReleaseIntArrayElements, 3741 jni_ReleaseLongArrayElements, 3742 jni_ReleaseFloatArrayElements, 3743 jni_ReleaseDoubleArrayElements, 3744 3745 jni_GetBooleanArrayRegion, 3746 jni_GetByteArrayRegion, 3747 jni_GetCharArrayRegion, 3748 jni_GetShortArrayRegion, 3749 jni_GetIntArrayRegion, 3750 jni_GetLongArrayRegion, 3751 jni_GetFloatArrayRegion, 3752 jni_GetDoubleArrayRegion, 3753 3754 jni_SetBooleanArrayRegion, 3755 jni_SetByteArrayRegion, 3756 jni_SetCharArrayRegion, 3757 jni_SetShortArrayRegion, 3758 jni_SetIntArrayRegion, 3759 jni_SetLongArrayRegion, 3760 jni_SetFloatArrayRegion, 3761 jni_SetDoubleArrayRegion, 3762 3763 jni_RegisterNatives, 3764 jni_UnregisterNatives, 3765 3766 jni_MonitorEnter, 3767 jni_MonitorExit, 3768 3769 jni_GetJavaVM, 3770 3771 jni_GetStringRegion, 3772 jni_GetStringUTFRegion, 3773 3774 jni_GetPrimitiveArrayCritical, 3775 jni_ReleasePrimitiveArrayCritical, 3776 3777 jni_GetStringCritical, 3778 jni_ReleaseStringCritical, 3779 3780 jni_NewWeakGlobalRef, 3781 jni_DeleteWeakGlobalRef, 3782 3783 jni_ExceptionCheck, 3784 3785 jni_NewDirectByteBuffer, 3786 jni_GetDirectBufferAddress, 3787 jni_GetDirectBufferCapacity, 3788 3789 // New 1_6 features 3790 3791 jni_GetObjectRefType, 3792 3793 // Module features 3794 3795 jni_GetModule, 3796 jni_AddModuleReads, 3797 jni_CanReadModule 3798}; 3799 3800 3801// For jvmti use to modify jni function table. 3802// Java threads in native contiues to run until it is transitioned 3803// to VM at safepoint. Before the transition or before it is blocked 3804// for safepoint it may access jni function table. VM could crash if 3805// any java thread access the jni function table in the middle of memcpy. 3806// To avoid this each function pointers are copied automically. 3807void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { 3808 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); 3809 intptr_t *a = (intptr_t *) jni_functions(); 3810 intptr_t *b = (intptr_t *) new_jni_NativeInterface; 3811 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { 3812 Atomic::store_ptr(*b++, a++); 3813 } 3814} 3815 3816void quicken_jni_functions() { 3817 // Replace Get<Primitive>Field with fast versions 3818 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() 3819 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls 3820#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) 3821 // windows x86 currently needs SEH wrapper and the gain of the fast 3822 // versions currently isn't certain for server vm on uniprocessor. 3823 && os::is_MP() 3824#endif 3825 ) { 3826 address func; 3827 func = JNI_FastGetField::generate_fast_get_boolean_field(); 3828 if (func != (address)-1) { 3829 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; 3830 } 3831 func = JNI_FastGetField::generate_fast_get_byte_field(); 3832 if (func != (address)-1) { 3833 jni_NativeInterface.GetByteField = (GetByteField_t)func; 3834 } 3835 func = JNI_FastGetField::generate_fast_get_char_field(); 3836 if (func != (address)-1) { 3837 jni_NativeInterface.GetCharField = (GetCharField_t)func; 3838 } 3839 func = JNI_FastGetField::generate_fast_get_short_field(); 3840 if (func != (address)-1) { 3841 jni_NativeInterface.GetShortField = (GetShortField_t)func; 3842 } 3843 func = JNI_FastGetField::generate_fast_get_int_field(); 3844 if (func != (address)-1) { 3845 jni_NativeInterface.GetIntField = (GetIntField_t)func; 3846 } 3847 func = JNI_FastGetField::generate_fast_get_long_field(); 3848 if (func != (address)-1) { 3849 jni_NativeInterface.GetLongField = (GetLongField_t)func; 3850 } 3851 func = JNI_FastGetField::generate_fast_get_float_field(); 3852 if (func != (address)-1) { 3853 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; 3854 } 3855 func = JNI_FastGetField::generate_fast_get_double_field(); 3856 if (func != (address)-1) { 3857 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; 3858 } 3859 } 3860} 3861 3862// Returns the function structure 3863struct JNINativeInterface_* jni_functions() { 3864#if INCLUDE_JNI_CHECK 3865 if (CheckJNICalls) return jni_functions_check(); 3866#endif // INCLUDE_JNI_CHECK 3867 return &jni_NativeInterface; 3868} 3869 3870// Returns the function structure 3871struct JNINativeInterface_* jni_functions_nocheck() { 3872 return &jni_NativeInterface; 3873} 3874 3875 3876// Invocation API 3877 3878 3879// Forward declaration 3880extern const struct JNIInvokeInterface_ jni_InvokeInterface; 3881 3882// Global invocation API vars 3883volatile jint vm_created = 0; 3884// Indicate whether it is safe to recreate VM 3885volatile jint safe_to_recreate_vm = 1; 3886struct JavaVM_ main_vm = {&jni_InvokeInterface}; 3887 3888 3889#define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ 3890enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; 3891 3892DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint 3893 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref)); 3894 3895_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { 3896 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_); 3897 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; 3898 jint ret = JNI_ERR; 3899 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); 3900 3901 if (Threads::is_supported_jni_version(args->version)) { 3902 ret = JNI_OK; 3903 } 3904 // 1.1 style no longer supported in hotspot. 3905 // According the JNI spec, we should update args->version on return. 3906 // We also use the structure to communicate with launcher about default 3907 // stack size. 3908 if (args->version == JNI_VERSION_1_1) { 3909 args->version = JNI_VERSION_1_2; 3910 // javaStackSize is int in arguments structure 3911 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); 3912 args->javaStackSize = (jint)(ThreadStackSize * K); 3913 } 3914 return ret; 3915} 3916 3917DT_RETURN_MARK_DECL(CreateJavaVM, jint 3918 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref)); 3919 3920static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) { 3921 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args); 3922 3923 jint result = JNI_ERR; 3924 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3925 3926 // We're about to use Atomic::xchg for synchronization. Some Zero 3927 // platforms use the GCC builtin __sync_lock_test_and_set for this, 3928 // but __sync_lock_test_and_set is not guaranteed to do what we want 3929 // on all architectures. So we check it works before relying on it. 3930#if defined(ZERO) && defined(ASSERT) 3931 { 3932 jint a = 0xcafebabe; 3933 jint b = Atomic::xchg(0xdeadbeef, &a); 3934 void *c = &a; 3935 void *d = Atomic::xchg_ptr(&b, &c); 3936 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); 3937 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); 3938 } 3939#endif // ZERO && ASSERT 3940 3941 // At the moment it's only possible to have one Java VM, 3942 // since some of the runtime state is in global variables. 3943 3944 // We cannot use our mutex locks here, since they only work on 3945 // Threads. We do an atomic compare and exchange to ensure only 3946 // one thread can call this method at a time 3947 3948 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms 3949 // the add/dec implementations are dependent on whether we are running 3950 // on a multiprocessor, and at this stage of initialization the os::is_MP 3951 // function used to determine this will always return false. Atomic::xchg 3952 // does not have this problem. 3953 if (Atomic::xchg(1, &vm_created) == 1) { 3954 return JNI_EEXIST; // already created, or create attempt in progress 3955 } 3956 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { 3957 return JNI_ERR; // someone tried and failed and retry not allowed. 3958 } 3959 3960 assert(vm_created == 1, "vm_created is true during the creation"); 3961 3962 /** 3963 * Certain errors during initialization are recoverable and do not 3964 * prevent this method from being called again at a later time 3965 * (perhaps with different arguments). However, at a certain 3966 * point during initialization if an error occurs we cannot allow 3967 * this function to be called again (or it will crash). In those 3968 * situations, the 'canTryAgain' flag is set to false, which atomically 3969 * sets safe_to_recreate_vm to 1, such that any new call to 3970 * JNI_CreateJavaVM will immediately fail using the above logic. 3971 */ 3972 bool can_try_again = true; 3973 3974 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); 3975 if (result == JNI_OK) { 3976 JavaThread *thread = JavaThread::current(); 3977 assert(!thread->has_pending_exception(), "should have returned not OK"); 3978 /* thread is thread_in_vm here */ 3979 *vm = (JavaVM *)(&main_vm); 3980 *(JNIEnv**)penv = thread->jni_environment(); 3981 3982#if INCLUDE_JVMCI 3983 if (EnableJVMCI) { 3984 if (UseJVMCICompiler) { 3985 // JVMCI is initialized on a CompilerThread 3986 if (BootstrapJVMCI) { 3987 JavaThread* THREAD = thread; 3988 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH); 3989 compiler->bootstrap(THREAD); 3990 if (HAS_PENDING_EXCEPTION) { 3991 HandleMark hm; 3992 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 3993 } 3994 } 3995 } 3996 } 3997#endif 3998 3999 // Tracks the time application was running before GC 4000 RuntimeService::record_application_start(); 4001 4002 // Notify JVMTI 4003 if (JvmtiExport::should_post_thread_life()) { 4004 JvmtiExport::post_thread_start(thread); 4005 } 4006 4007 EventThreadStart event; 4008 if (event.should_commit()) { 4009 event.set_thread(THREAD_TRACE_ID(thread)); 4010 event.commit(); 4011 } 4012 4013#ifndef PRODUCT 4014 // Check if we should compile all classes on bootclasspath 4015 if (CompileTheWorld) ClassLoader::compile_the_world(); 4016 if (ReplayCompiles) ciReplay::replay(thread); 4017 4018 // Some platforms (like Win*) need a wrapper around these test 4019 // functions in order to properly handle error conditions. 4020 test_error_handler(); 4021 if (ExecuteInternalVMTests) { 4022 InternalVMTests::run(); 4023 } 4024#endif 4025 4026 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. 4027 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4028 } else { 4029 // If create_vm exits because of a pending exception, exit with that 4030 // exception. In the future when we figure out how to reclaim memory, 4031 // we may be able to exit with JNI_ERR and allow the calling application 4032 // to continue. 4033 if (Universe::is_fully_initialized()) { 4034 // otherwise no pending exception possible - VM will already have aborted 4035 JavaThread* THREAD = JavaThread::current(); 4036 if (HAS_PENDING_EXCEPTION) { 4037 HandleMark hm; 4038 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); 4039 } 4040 } 4041 4042 if (can_try_again) { 4043 // reset safe_to_recreate_vm to 1 so that retrial would be possible 4044 safe_to_recreate_vm = 1; 4045 } 4046 4047 // Creation failed. We must reset vm_created 4048 *vm = 0; 4049 *(JNIEnv**)penv = 0; 4050 // reset vm_created last to avoid race condition. Use OrderAccess to 4051 // control both compiler and architectural-based reordering. 4052 OrderAccess::release_store(&vm_created, 0); 4053 } 4054 4055 // Flush stdout and stderr before exit. 4056 fflush(stdout); 4057 fflush(stderr); 4058 4059 return result; 4060 4061} 4062 4063_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { 4064 jint result = 0; 4065 // On Windows, let CreateJavaVM run with SEH protection 4066#ifdef _WIN32 4067 __try { 4068#endif 4069 result = JNI_CreateJavaVM_inner(vm, penv, args); 4070#ifdef _WIN32 4071 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { 4072 // Nothing to do. 4073 } 4074#endif 4075 return result; 4076} 4077 4078_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { 4079 // See bug 4367188, the wrapper can sometimes cause VM crashes 4080 // JNIWrapper("GetCreatedJavaVMs"); 4081 4082 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs); 4083 4084 if (vm_created) { 4085 if (numVMs != NULL) *numVMs = 1; 4086 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); 4087 } else { 4088 if (numVMs != NULL) *numVMs = 0; 4089 } 4090 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK); 4091 return JNI_OK; 4092} 4093 4094extern "C" { 4095 4096DT_RETURN_MARK_DECL(DestroyJavaVM, jint 4097 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref)); 4098 4099jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { 4100 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm); 4101 jint res = JNI_ERR; 4102 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); 4103 4104 if (!vm_created) { 4105 res = JNI_ERR; 4106 return res; 4107 } 4108 4109 JNIWrapper("DestroyJavaVM"); 4110 JNIEnv *env; 4111 JavaVMAttachArgs destroyargs; 4112 destroyargs.version = CurrentVersion; 4113 destroyargs.name = (char *)"DestroyJavaVM"; 4114 destroyargs.group = NULL; 4115 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); 4116 if (res != JNI_OK) { 4117 return res; 4118 } 4119 4120 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. 4121 JavaThread* thread = JavaThread::current(); 4122 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4123 if (Threads::destroy_vm()) { 4124 // Should not change thread state, VM is gone 4125 vm_created = false; 4126 res = JNI_OK; 4127 return res; 4128 } else { 4129 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4130 res = JNI_ERR; 4131 return res; 4132 } 4133} 4134 4135 4136static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { 4137 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; 4138 4139 // Check below commented out from JDK1.2fcs as well 4140 /* 4141 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { 4142 return JNI_EVERSION; 4143 } 4144 */ 4145 4146 Thread* t = Thread::current_or_null(); 4147 if (t != NULL) { 4148 // If the thread has been attached this operation is a no-op 4149 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); 4150 return JNI_OK; 4151 } 4152 4153 // Create a thread and mark it as attaching so it will be skipped by the 4154 // ThreadsListEnumerator - see CR 6404306 4155 JavaThread* thread = new JavaThread(true); 4156 4157 // Set correct safepoint info. The thread is going to call into Java when 4158 // initializing the Java level thread object. Hence, the correct state must 4159 // be set in order for the Safepoint code to deal with it correctly. 4160 thread->set_thread_state(_thread_in_vm); 4161 thread->record_stack_base_and_size(); 4162 thread->initialize_thread_current(); 4163 4164 if (!os::create_attached_thread(thread)) { 4165 delete thread; 4166 return JNI_ERR; 4167 } 4168 // Enable stack overflow checks 4169 thread->create_stack_guard_pages(); 4170 4171 thread->initialize_tlab(); 4172 4173 thread->cache_global_variables(); 4174 4175 // Crucial that we do not have a safepoint check for this thread, since it has 4176 // not been added to the Thread list yet. 4177 { Threads_lock->lock_without_safepoint_check(); 4178 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to 4179 // avoid this thread trying to do a GC before it is added to the thread-list 4180 thread->set_active_handles(JNIHandleBlock::allocate_block()); 4181 Threads::add(thread, daemon); 4182 Threads_lock->unlock(); 4183 } 4184 // Create thread group and name info from attach arguments 4185 oop group = NULL; 4186 char* thread_name = NULL; 4187 if (args != NULL && Threads::is_supported_jni_version(args->version)) { 4188 group = JNIHandles::resolve(args->group); 4189 thread_name = args->name; // may be NULL 4190 } 4191 if (group == NULL) group = Universe::main_thread_group(); 4192 4193 // Create Java level thread object and attach it to this thread 4194 bool attach_failed = false; 4195 { 4196 EXCEPTION_MARK; 4197 HandleMark hm(THREAD); 4198 Handle thread_group(THREAD, group); 4199 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); 4200 if (HAS_PENDING_EXCEPTION) { 4201 CLEAR_PENDING_EXCEPTION; 4202 // cleanup outside the handle mark. 4203 attach_failed = true; 4204 } 4205 } 4206 4207 if (attach_failed) { 4208 // Added missing cleanup 4209 thread->cleanup_failed_attach_current_thread(); 4210 return JNI_ERR; 4211 } 4212 4213 // mark the thread as no longer attaching 4214 // this uses a fence to push the change through so we don't have 4215 // to regrab the threads_lock 4216 thread->set_done_attaching_via_jni(); 4217 4218 // Set java thread status. 4219 java_lang_Thread::set_thread_status(thread->threadObj(), 4220 java_lang_Thread::RUNNABLE); 4221 4222 // Notify the debugger 4223 if (JvmtiExport::should_post_thread_life()) { 4224 JvmtiExport::post_thread_start(thread); 4225 } 4226 4227 EventThreadStart event; 4228 if (event.should_commit()) { 4229 event.set_thread(THREAD_TRACE_ID(thread)); 4230 event.commit(); 4231 } 4232 4233 *(JNIEnv**)penv = thread->jni_environment(); 4234 4235 // Now leaving the VM, so change thread_state. This is normally automatically taken care 4236 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by 4237 // using ThreadStateTransition::transition, we do a callback to the safepoint code if 4238 // needed. 4239 4240 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); 4241 4242 // Perform any platform dependent FPU setup 4243 os::setup_fpu(); 4244 4245 return JNI_OK; 4246} 4247 4248 4249jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { 4250 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args); 4251 if (!vm_created) { 4252 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4253 return JNI_ERR; 4254 } 4255 4256 JNIWrapper("AttachCurrentThread"); 4257 jint ret = attach_current_thread(vm, penv, _args, false); 4258 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret); 4259 return ret; 4260} 4261 4262 4263jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { 4264 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm); 4265 VM_Exit::block_if_vm_exited(); 4266 4267 JNIWrapper("DetachCurrentThread"); 4268 4269 // If the thread has already been detached the operation is a no-op 4270 if (Thread::current_or_null() == NULL) { 4271 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4272 return JNI_OK; 4273 } 4274 4275 JavaThread* thread = JavaThread::current(); 4276 if (thread->has_last_Java_frame()) { 4277 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR); 4278 // Can't detach a thread that's running java, that can't work. 4279 return JNI_ERR; 4280 } 4281 4282 // Safepoint support. Have to do call-back to safepoint code, if in the 4283 // middel of a safepoint operation 4284 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); 4285 4286 // XXX: Note that JavaThread::exit() call below removes the guards on the 4287 // stack pages set up via enable_stack_{red,yellow}_zone() calls 4288 // above in jni_AttachCurrentThread. Unfortunately, while the setting 4289 // of the guards is visible in jni_AttachCurrentThread above, 4290 // the removal of the guards is buried below in JavaThread::exit() 4291 // here. The abstraction should be more symmetrically either exposed 4292 // or hidden (e.g. it could probably be hidden in the same 4293 // (platform-dependent) methods where we do alternate stack 4294 // maintenance work?) 4295 thread->exit(false, JavaThread::jni_detach); 4296 delete thread; 4297 4298 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK); 4299 return JNI_OK; 4300} 4301 4302DT_RETURN_MARK_DECL(GetEnv, jint 4303 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref)); 4304 4305jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { 4306 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version); 4307 jint ret = JNI_ERR; 4308 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); 4309 4310 if (!vm_created) { 4311 *penv = NULL; 4312 ret = JNI_EDETACHED; 4313 return ret; 4314 } 4315 4316 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) { 4317 return ret; 4318 } 4319 4320#ifndef JVMPI_VERSION_1 4321// need these in order to be polite about older agents 4322#define JVMPI_VERSION_1 ((jint)0x10000001) 4323#define JVMPI_VERSION_1_1 ((jint)0x10000002) 4324#define JVMPI_VERSION_1_2 ((jint)0x10000003) 4325#endif // !JVMPI_VERSION_1 4326 4327 Thread* thread = Thread::current_or_null(); 4328 if (thread != NULL && thread->is_Java_thread()) { 4329 if (Threads::is_supported_jni_version_including_1_1(version)) { 4330 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); 4331 ret = JNI_OK; 4332 return ret; 4333 4334 } else if (version == JVMPI_VERSION_1 || 4335 version == JVMPI_VERSION_1_1 || 4336 version == JVMPI_VERSION_1_2) { 4337 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); 4338 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4339 ret = JNI_EVERSION; 4340 return ret; 4341 } else if (JvmtiExport::is_jvmdi_version(version)) { 4342 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); 4343 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); 4344 ret = JNI_EVERSION; 4345 return ret; 4346 } else { 4347 *penv = NULL; 4348 ret = JNI_EVERSION; 4349 return ret; 4350 } 4351 } else { 4352 *penv = NULL; 4353 ret = JNI_EDETACHED; 4354 return ret; 4355 } 4356} 4357 4358 4359jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { 4360 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args); 4361 if (!vm_created) { 4362 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR); 4363 return JNI_ERR; 4364 } 4365 4366 JNIWrapper("AttachCurrentThreadAsDaemon"); 4367 jint ret = attach_current_thread(vm, penv, _args, true); 4368 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret); 4369 return ret; 4370} 4371 4372 4373} // End extern "C" 4374 4375const struct JNIInvokeInterface_ jni_InvokeInterface = { 4376 NULL, 4377 NULL, 4378 NULL, 4379 4380 jni_DestroyJavaVM, 4381 jni_AttachCurrentThread, 4382 jni_DetachCurrentThread, 4383 jni_GetEnv, 4384 jni_AttachCurrentThreadAsDaemon 4385}; 4386